CN111926579A

CN111926579A - Fluorine-free anti-siphon high-density synthetic leather and production method thereof

Info

Publication number: CN111926579A
Application number: CN202010756811.XA
Authority: CN
Inventors: 贾军辉; 苏德业; 叶陆阳; 柯博元
Original assignee: An'an China Co ltd
Current assignee: An'an China Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2020-11-13
Anticipated expiration: 2040-07-31
Also published as: CN111926579B

Abstract

The invention provides a fluoride-free anti-siphon high-density synthetic leather and a production method thereof, wherein the method comprises the steps that non-woven fabrics are unreeled through a fabric storage rack, the unreeled non-woven fabrics enter an impregnation groove for impregnation, and the non-woven fabrics enter a pre-solidification groove for pre-solidification after the impregnation is finished; the pre-solidified non-woven fabric is subjected to ironing treatment by an ironing device and is subjected to surface material blade coating treatment by a coating table device provided with a coating knife; the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; the synthetic leather coming out of the three-fold coagulation tank enters a washing tank for washing to obtain the base; and (3) the bass coming out of the rinsing bath is pre-scalded by a ironing roller, dried by an oven and wound. The invention has the advantages that: the produced bass has fluorine content meeting the environmental protection requirement, and does not cause harm to human health; the anti-siphon effect is good, and the stripping data is high; the base material has the advantages of full base hand feeling, good rebound resilience and the like.

Description

Fluorine-free anti-siphon high-density synthetic leather and production method thereof

Technical Field

The invention relates to the field of synthetic leather, in particular to fluorine-free anti-siphon high-density synthetic leather and a production method thereof.

Background

The synthetic leather product is applied to various aspects in our life, and the functions of the product are rich and colorful. In recent years, waterproof synthetic leather materials are increasingly favored, and are applied to more and more shoe types. People are also experimenting on how to make leisure shoes, sports shoes and the like which are worn normally into waterproof shoes with the same waterproof effect as water shoes. At present, more and more shoes with waterproof effect are on the market, but the stability and environmental protection performance of the shoes still can not meet the requirements; and a lot of waterproof materials are all added with fluorine waterproofing agents, and although the waterproof effect of the fluorine waterproofing agents is good, fluorine is a substance harmful to human bodies and is not environment-friendly, so fluorine-containing products are increasingly eliminated.

In view of the above problems, the present inventors have conducted extensive studies and have made the present invention.

Disclosure of Invention

The invention aims to solve the technical problem of providing fluorine-free anti-siphon high-density synthetic leather and a production method thereof, and solves the problem that the waterproof stability and environmental protection performance of the conventional synthetic leather cannot meet the requirements.

The invention is realized by the following steps:

in a first aspect: a production method of fluorine-free anti-siphon high-density synthetic leather comprises the following steps:

s1, unreeling the non-woven fabric through a fabric storage rack, enabling the unreeled non-woven fabric to enter an impregnation tank for impregnation, and entering a pre-solidification tank for pre-solidification after impregnation; the pre-solidified non-woven fabric is subjected to ironing treatment by an ironing device and is subjected to surface material blade coating treatment by a coating table device provided with a coating knife;

s2, the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; the synthetic leather coming out of the three-fold coagulation tank enters a washing tank for washing to obtain the base;

and S3, pre-ironing the bass discharged from the rinsing bath by using an ironing roller, drying the bass by using an oven, and rolling the dried bass.

Further, in the step S1, the thickness of the nonwoven fabric is 0.65 to 0.75 mm.

Further, the gram weight of the non-woven fabric is 195-205g/m²。

Further, the burst of the non-woven fabric was 17kgf/cm²。

Furthermore, the tensile strength of the non-woven fabric is more than 120N in the warp direction and more than 70N in the weft direction.

Furthermore, the elongation at break is greater than 80% in the warp direction and greater than 170% in the weft direction.

Further, in the step S1, the thickness of the nonwoven fabric is 0.85 to 0.95 mm.

Further, the gram weight of the non-woven fabric is 235-245g/m²。

Further, the burst of the non-woven fabric was 18kgf/cm²。

Furthermore, the tensile strength of the non-woven fabric is larger than 140N in the warp direction and larger than 80N in the weft direction.

Furthermore, the elongation at break is greater than 90% in the warp direction and greater than 190% in the weft direction.

Further, before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried.

Further, in the step S1, the unwinding speed of the cloth storage rack is 9 m/min.

Further, in step S1, the impregnation solution in the impregnation tank is prepared as follows: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15 are added.

Further, the prepared impregnation liquid is stirred for 15-20 minutes at the stirring speed of 1000-1500r/min at normal temperature.

Furthermore, the viscosity of the prepared impregnation liquid is between 140 and 200 cps.

Further, in the impregnation liquid, the resin is hydrolysis-resistant impregnation resin.

Furthermore, in the impregnation liquid, the solid content of the resin is 30%, the hundred percent modulus is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity range is 10-12 ten thousand.

Further, in the step S1, the pressure of the oil-impregnated press roller in the impregnation tank is 5 to 5.5 Kg.

Further, in the step S1, the sugar degree of the pre-solidified liquid in the pre-solidification tank is 35 to 38%.

Further, in the step S1, the pressure of the pre-solidified oil pressure roller in the pre-solidified groove is between 5Kg and 5.5 Kg.

Further, in the step S1, the ironing temperature of the ironing device is 50 ℃.

Further, in the step S1, the draw-coated fabric is prepared as resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2 are added.

Further, the prepared fabric is stirred at high speed for 30-35 minutes at the stirring speed of 1000-1500r/min at normal temperature.

Further, after the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at a stirring speed of 300 +/-50 r/min.

Furthermore, the viscosity of the prepared fabric is 9000cps-10000 cps.

Further, in the fabric, the resin is polyester-polyether blend resin.

Furthermore, the solid content of the resin is 35%, the hundred percent modulus is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity range is 16-18 ten thousand.

Further, in the step S1, the coating gap of the coating knife is between 225 ± 5 filaments.

Further, in the step S1, the coating weight of the coating knife is between 1.48 plus or minus 0.05 kg/y.

Further, in the step S2, the sugar degree of the coagulation liquid in the triple-reverse-flow coagulation tank is 16 to 18%.

Further, in the step S2, the temperature of the coagulation liquid in the triple-turn coagulation tank is 30 ± 2 ℃.

Further, in the step S2, before the synthetic leather enters the rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.45-1.50 mm.

Further, in the step S2, before the synthetic leather enters the rinsing bath, the width of the synthetic leather is measured and controlled to be 1.47-1.49 m.

Further, in the step S2, the water washing tank has 15 sets.

Furthermore, in the 15 groups of rinsing baths, the rinsing sugar degrees of the first six groups of rinsing baths are controlled to be between 20 and 10 percent, the rinsing sugar degrees of the middle six groups of rinsing baths are controlled to be between 10 and 0 percent, and the rinsing sugar degrees of the last three groups of rinsing baths are 0 percent.

Further, the washing temperatures of the last three groups of washing tanks are controlled at 70 +/-5 ℃.

Further, in the step S3, the pre-ironing temperature of the ironing roller is 110 ± 10 ℃.

Further, in the step S3, the oven has 5 sets.

Furthermore, in 5 groups of drying ovens, the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃.

Further, after the drying is finished, the thickness of the rolled bass is controlled to be 1.3-1.4 mm.

Further, after the drying is finished, the width of the rolled bass is controlled to be between 145 and 147 cm.

In a second aspect: the fluorine-free anti-siphon high-density synthetic leather is prepared by the production method.

The invention has the following advantages: according to the bass produced by the technical scheme of the invention, the three-centimeter opposite-sticking peeling performance can reach 120N/3cm, and the softness test value is between 2.3 and 2.5; the dynamic anti-siphon of left, right side sample test respectively, at the pre-deflection processing 3000 times, there is not the infiltration condition, and the static anti-siphon of back test can reach twenty four hours and can not have the climbing phenomenon. Therefore, the produced bass has fluorine content meeting the requirement of environmental protection, and cannot cause harm to human health; the anti-siphon effect is good, and the stripping data is high; the base material has the advantages of full base hand feeling, good rebound resilience and the like.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of a production apparatus of the present invention.

FIG. 2 is a schematic view showing the structure of the water repellent tank and the second oven according to the present invention.

FIG. 3 is a schematic view of the internal structure of the pre-coagulation tank of the present invention.

Description of reference numerals:

1-unreeling cloth storage rack, 2-soaking tank, 21-oil soaking press roll, 3-pre-solidifying tank, 31-pre-solidifying oil press roll, 4-ironing device, 5-coating device, 51-coating knife, 6-three-fold-back solidifying tank, 61-solidifying oil press roll, 7-water washing tank, 71-third press roll, 72-water washing oil press roll, 8-ironing roll, 9-first oven, 91-second guide roll, 10-cooling roll, 11-reeling cloth storage rack, 12-water-proofing agent tank, 121-water-proofing oil press roll, 13-second oven, 131-third guide roll, 14-first press roll, 15-second press roll and 16-first guide roll.

Detailed Description

The invention relates to a production method of fluorine-free anti-siphon high-density synthetic leather, which comprises the following steps:

According to the bass produced by the technical scheme, the three-centimeter opposite-sticking peeling performance can reach 120N/3cm, and the softness test value is between 2.3 and 2.5; the dynamic anti-siphon of left, right side sample test respectively, at the pre-deflection processing 3000 times, there is not the infiltration condition, and the static anti-siphon of back test can reach twenty four hours and can not have the climbing phenomenon. Therefore, the Bayes produced by the invention have fluorine content meeting the environmental protection requirement and can not cause harm to human health; the anti-siphon effect is good, and the stripping data is high; the base material has the advantages of full base hand feeling, good rebound resilience and the like.

Because the technical scheme of the invention has higher requirements on physical properties (physical properties), the non-woven fabric needs to have certain physical property requirements in the selection, including higher density, thicker overall structure and better rebound resilience compared with the normal non-woven fabric. Because the semi-finished product needs different thickness specifications of 2 during specific production and manufacturing, one is 1.2mm, and the other is 1.4 mm; therefore, 2 kinds of non-woven fabrics with different specifications need to be selected.

Specification of the first nonwoven fabric:

in the present invention, in order to satisfy physical properties such as high density, a massive structure, and good resilience, the thickness of the non-woven fabric is 0.65 to 0.75mm in the step S1. The gram weight of the non-woven fabric is 195-205g/m². The burst of the non-woven fabric is 17kgf/cm². The tensile strength of the non-woven fabric is more than 120N in the warp direction and more than 70N in the weft direction. The elongation at break is more than 80% in warp direction and more than 170% in weft direction.

Specification of the second nonwoven fabric:

in the present invention, in order to satisfy physical properties such as high density, a thick overall structure, and good resilience, the thickness of the non-woven fabric is 0.85 to 0.95mm in the step S1. The gram weight of the non-woven fabric is 235-245g/m². The burst of the non-woven fabric is 18kgf/cm². The tensile strength of the non-woven fabric is greater than 140N in the warp direction and greater than 80N in the weft direction. The elongation at break is greater than 90% in warp direction and greater than 190% in weft direction.

In the invention, before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment by using a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The invention requires higher waterproof effect, so the non-woven fabric needs to be pretreated; the non-woven fabric is treated and dried by the water-based waterproof agent, and the non-woven fabric is enabled to obtain a waterproof effect through treatment and permeation of the water-based waterproof agent.

In the invention, in order to better meet the actual production requirement and realize a better permeation effect, in the step S1, the unreeling speed of the cloth storage rack is 9 m/min.

In the present invention, in step S1, the impregnation solution in the impregnation tank is prepared as follows: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15 are added. The impregnation material is prepared from the following components: dimethylformamide: tear resistance aid: the weight ratio of the anionic surfactant to the hydrolysis-resistant auxiliary agent to the color paste is 100: 300: 15: 2: 1: 12, adding; compared with the prior impregnation material, the invention reduces the part of the dimethylformamide, thereby improving the viscosity of the impregnation slurry, improving the solid content of the whole impregnation liquid and having better hand feeling.

In the invention, in order to completely dissolve the resin, the color paste and the hydrolysis-resistant additive, the prepared impregnation liquid is stirred for 15-20 minutes at the stirring speed of 1000-1500r/min at normal temperature.

In the invention, in order to ensure that the whole solid content of the impregnation liquid is improved and the hand feeling is better, the viscosity of the prepared impregnation liquid is between 140 and 200 cps.

In the present invention, the resin in the impregnation liquid is a hydrolysis-resistant impregnation resin. The hydrolysis-resistant impregnated resin has the advantages of excellent color development, excellent dynamic anti-siphon effect and no fluorine compound.

In the impregnation liquid, the solid content of the resin is 30 percent, the hundred percent modulus is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity range is between 10 and 12 ten thousand. The resin with physical properties has the advantages of low speed, large material consumption and fine wrinkles when the DMF aqueous solution is solidified; the resin is characterized in that the resin has the water repellent effect under the condition of no adding water-splashing agent, so that the anti-siphon effect is achieved when the finished product is obtained.

In the present invention, in the step S1, the pressure of the oil-impregnated press roller in the impregnation tank is 5 to 5.5 Kg. Because certain pressure is needed to be applied to the non-woven fabric during impregnation, and the pressure cannot be too much, the pressure is controlled to be between 5 and 5.5 Kg.

In the present invention, in order to achieve the pre-coagulation purpose and improve the product performance, in step S1, the sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 35 to 38%; the sugar degree is the concentration of DMF in an aqueous solution of DMF and is measured by Abbe refractometer. The pre-coagulation liquid is obtained by mixing dimethyl formamide and water.

In the present invention, in the step S1, the pressure of the pre-solidified oil pressure roller in the pre-solidification groove is between 5Kg and 5.5 Kg. Because certain pressure needs to be applied to the non-woven fabric during pre-solidification, and the pressure cannot be too much, the pressure is controlled to be between 5 and 5.5 Kg.

In the present invention, in order to achieve a good ironing effect, in the step S1, the ironing temperature of the ironing device is 50 ℃. The ironing device adopts six wheels of ironing rollers.

In the present invention, in the step S1, the draw-down coating fabric is prepared as resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2 are added. The former fabric is prepared from resin: dimethylformamide: anionic active agent: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 40: 1: 1.5: 3, adding; compared with the prior fabric preparation, the fluorine-free filler is added in the fabric, so that the fullness of the slurry is improved; the part of the dimethylformamide is increased, the viscosity of the slurry is reduced, and the slurry can easily permeate into the non-woven fabric; the anionic active agent is deleted, and although the anionic active agent is beneficial to improving the peeling strength, the auxiliary agent has certain hydrophilicity and can affect a waterproof test more or less, so that the stability is not high; the black paste is reduced from 3 parts to 2 parts at present, and because the black paste contains carbon black which absorbs water comparatively, the reduction of the parts is also helpful for the waterproof test.

In the invention, in order to completely dissolve the resin, the fluorine-free filler, the hydrolysis-resistant additive and the color paste and ensure the uniformity of the slurry, the prepared fabric is stirred at a high speed of 1000-1500r/min for 30-35 minutes at normal temperature. The time of high-speed stirring must be strictly controlled between 30 minutes and 35 minutes, because too short time of slurry stirring may not be sufficient, and too long time of slurry stirring may cause too high temperature of slurry, resulting in dead slurry.

In the invention, in order to eliminate bubbles in the fabric, the fabric is uniformly stirred at a high speed and then vacuum defoamed for 90min at a stirring speed of 300 +/-50 r/min.

In the invention, in order to ensure that the sizing agent can easily permeate into the non-woven fabric, the viscosity of the prepared fabric is 9000cps-10000cps (temperature is 30 ℃).

In the invention, in the fabric, the resin is polyester-polyether blend resin. The polyester-polyether blended resin has the advantages of high solid content, excellent leather-forming resilience, high peel strength and no fluorine-containing compound in the resin.

In the invention, the solid content of the resin is 35%, the hundred percent modulus is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity range is 16-18 ten thousand. Compared with the prior resin, the resin with physical properties has higher solid content under the condition of reducing the viscosity, so that the resin has better rebound effect; when the resin with physical properties is foamed and solidified by a DMF (dimethyl formamide) aqueous solution, the foam pore structure is thinner than that of the conventional resin, and the elasticity is better; the resin is characterized by having the effect of water repellency under the condition of no addition of a water splashing agent, so that the anti-siphon effect is achieved when a finished product is obtained.

In the present invention, in order to ensure that the thickness of the coating layer can meet the actual production requirement, in the step S1, the coating gap of the coating knife is between 225 ± 5 filaments.

In the present invention, in order to ensure that the coating amount can meet the actual production requirement, in the step S1, the coating amount of the coating knife is between 1.48 ± 0.05 kg/y. In practice, after the coating is applied, attention is paid to observing the surface condition of the coating, and timely treatment is required once an abnormality occurs.

In the present invention, in order to achieve a better solidification effect, in step S2, the sugar degree of the solidification liquid in the triple-turn solidification tank is 16 to 18%; the sugar degree is the concentration of DMF in DMF water solution, and is measured by Abbe refractometer. In order to meet the requirement of three-fold solidification and ensure the solidification effect, the length of the three-fold solidification tank is set to be 30 m.

In the present invention, in order to sufficiently solidify the slurry, the temperature of the solidification liquid in the triple-turn solidification tank is 30 ± 2 ℃ in step S2.

According to the production method, the non-woven fabric is pre-solidified through the pre-solidification tank, so that the permeation effect of the non-woven fabric can be met, and then the non-woven fabric is solidified through the three-fold-back solidification tank, so that the problem that the cell structure is large can be effectively solved.

In the present invention, in order to meet the actual production requirement, in step S2, the synthetic leather is measured before entering the rinsing bath, and the thickness of the synthetic leather is controlled to be 1.45-1.50 mm.

In the present invention, in order to meet the actual production requirement, in step S2, the width of the synthetic leather is measured before the synthetic leather enters the rinsing bath, and the width is controlled to be 1.47-1.49 m.

In order to achieve a better water washing effect, the invention adopts multiple stages of water washing tanks, and the water washing sugar degree is gradually reduced, in the step S2, the water washing tanks are provided with 15 groups, in the 15 groups of water washing tanks, the water washing sugar degree of the first six groups of water washing tanks is controlled to be 20-10%, the water washing sugar degree of the middle six groups of water washing tanks is controlled to be 10-0%, and the water washing sugar degree of the last three groups of water washing tanks is 0%, wherein the sugar degree is the concentration of DMF in DMF aqueous solution, and the data is obtained after measurement by an Abbe refractometer. The washing temperature of the last three groups of washing tanks is controlled at 70 +/-5 ℃.

In the present invention, in order to achieve a better ironing effect, in the step S3, the pre-ironing temperature of the ironing roller is 110 ± 10 ℃. The ironing rollers are eight-wheel ironing rollers.

In the present invention, in order to achieve a better drying effect, the present invention adopts a gradient drying manner, and in the step S3, the oven has 5 groups. In 5 groups of drying ovens, the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃.

In the invention, in order to meet the actual production requirement, the thickness of the rolled bass is controlled to be 1.3-1.4mm after the drying is finished.

In the invention, in order to meet the actual production requirement, after the drying is finished, the width of the wound bass is controlled to be between 145 and 147 cm.

The invention is further illustrated by the following specific examples, which take the specification of the first nonwoven fabric as an example:

example 1

A production method of fluorine-free anti-siphon high-density synthetic leather comprises the following steps:

s1, unreeling the non-woven fabric through a fabric storage rack, enabling the unreeled non-woven fabric to enter an impregnation tank for impregnation, and entering a pre-solidification tank for pre-solidification after impregnation; and (3) ironing the pre-solidified non-woven fabric by using an ironing device, and carrying out blade coating on the fabric by using a coating table device provided with a coating knife.

In the step S1, the nonwoven fabric has a thickness of 0.65mm and a grammage of 195g/m²Blasting at 17kgf/cm²(ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9 m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15 are added. The prepared impregnation solution was stirred at a stirring speed of 1000r/min at room temperature for 15 minutes. The viscosity of the prepared impregnation liquid is 140 cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity is 10 ten thousand. The pressure of the oil-impregnated press roller in the impregnation tank is 5 Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 35%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5 Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: durableHydrolysis aid: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2, adding the mixture, and stirring the prepared fabric at a high speed of 1000r/min for 30 minutes at normal temperature. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at a stirring speed of 250r/min, and the viscosity of the prepared fabric is 9000 cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity is 16 ten thousand. The coating gap of the coating knife is 220 filaments. The coating weight of the coating knife was 1.43 kg/y.

S2, the non-woven fabric coated with the fabric enters a three-fold coagulation tank for coagulation to obtain synthetic leather; and (4) the synthetic leather coming out of the three-fold coagulation tank enters a washing tank for washing to obtain the base.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 16%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 28 ℃. Before the synthetic leather enters a rinsing bath, measuring the thickness of the synthetic leather, and controlling the thickness to be 1.45 mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.47 m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 10%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 0%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 65 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 100 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.3mm, and the width of the rolled bass is controlled to be 145 cm.

Example 2

In the step S1, the nonwoven fabric has a thickness of 0.70mm and a grammage of 200g/m²Blasting at 17kgf/cm²(ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9 m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15, and stirring the prepared impregnation liquid at the normal temperature at the stirring speed of 1200r/min for 18 minutes, wherein the viscosity of the prepared impregnation liquid is 170 cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity is 11 ten thousand. The pressure of the oil-impregnated press roller in the impregnation tank is 5.2 Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 36%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.2 Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2, adding the mixture, and stirring the prepared fabric at a high speed of 1300r/min for 32 minutes at normal temperature. After the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 300r/min, and the viscosity of the prepared fabric is 9500 cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity is 17 ten thousand. The coating gap of the coating knife was 225 filaments. The coating weight of the coating knife was 1.48 kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 17%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 30 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.48 mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.48 m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 15%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 5%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 70 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 110 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.35mm, and the width of the rolled bass is controlled to be 146 cm.

Example 3

In the step S1, the nonwoven fabric has a thickness of 0.75mm and a grammage of 205g/m²Blasting at 17kgf/cm²(ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment by a water-based waterproof agent and is to be preventedAnd drying the non-woven fabric after water treatment. The unwinding speed of the cloth storage rack is 9 m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15, and stirring the prepared impregnation solution at a stirring speed of 1500r/min for 20 minutes at normal temperature. The viscosity of the prepared impregnation liquid is 200 cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity is 12 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5.5 Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 38%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.5 Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2, adding the mixture, and stirring the prepared fabric at a high speed of 1500r/min for 35 minutes at normal temperature. After the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at a stirring speed of 350r/min, and the viscosity of the prepared fabric is 10000 cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity is 18 ten thousand. The coating gap of the coating knife was 230 filaments. The coating weight of the coating knife was 1.53 kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 18%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 32 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.50 mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.49 m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 20%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 10%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 75 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 120 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.4mm, and the width of the rolled bass is controlled to be 147 cm.

Example 4

In the step S1, the nonwoven fabric has a thickness of 0.65mm and a grammage of 198g/m²Blasting at 17kgf/cm²(ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9 m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15, and stirring the prepared impregnation liquid at the normal temperature at a stirring speed of 1100r/min for 20 minutes to obtain the prepared impregnation liquid with the viscosity of 166 cps. In the immersion liquid, the resin is hydrolysis-resistant type immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity is 10.5 ten thousand. The pressure of the oil-impregnated press roller in the impregnation tank is 5 Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 36%. Pre-coagulationThe pressure of the pre-solidified oil press roller in the groove is 5.5 Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2, adding the mixture, and stirring the prepared fabric at a high speed of 1400r/min for 30 minutes at normal temperature. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 300 r/min. The viscosity of the prepared fabric is 9200 cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity is 17.5 ten thousand. The coating gap of the coating knife was 226 filaments. The coating weight of the coating knife was 1.49 kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 17%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 31 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.48 mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.47 m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 11%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 8%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 72 ℃.

In the step S3, the pre-ironing temperature of the ironing roller is 104 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.37mm, and the width of the rolled bass is controlled to be 145 cm.

Example 5

In the step S1, the nonwoven fabric has a thickness of 0.72mm and a grammage of 204g/m²Blasting at 17kgf/cm²(ii) a The tensile strength is more than 120N in the warp direction and more than 70N in the weft direction; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9 m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15, and stirring the prepared impregnation liquid at the normal temperature at a stirring speed of 1400r/min for 16 minutes, wherein the viscosity of the prepared impregnation liquid is 180 cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity is 10 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5.1 Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 38%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.4 Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2, adding the mixture, and stirring the prepared fabric at a high speed of 1500r/min for 33 minutes at normal temperature. After the fabric is uniformly stirred at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 320r/min, and the viscosity of the prepared fabric is 9990 cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity is 16 ten thousand. Coating of coating knifeThe gap is at 230 filaments. The coating weight of the coating knife was 1.48 kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 17%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 32 ℃. Before the synthetic leather enters a rinsing bath, the thickness of the synthetic leather is measured and controlled to be 1.46 mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.49 m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 20%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 6%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperatures of the latter three groups of water washing tanks were controlled at 69 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 114 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.36mm, and the width of the rolled bass is controlled to be 145 cm.

Example 6

in the step S1, the nonwoven fabric has a thickness of 0.67mm and a grammage of 199g/m²Blasting at 17kgf/cm²(ii) a Tensile strength warp direction > 120NThe weft direction is more than 70N; the elongation at break is more than 80% in warp direction and more than 170% in weft direction. Before the non-woven fabric is unreeled, the non-woven fabric is subjected to waterproof treatment through a water-based waterproof agent, and the non-woven fabric subjected to waterproof treatment is dried. The unwinding speed of the cloth storage rack is 9 m/min. The impregnation liquid in the impregnation tank is prepared from the following resin: dimethylformamide: tear resistance aid: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 250: 15: 2: 15, and stirring the prepared impregnation liquid at a stirring speed of 1500r/min for 19 minutes at normal temperature, wherein the viscosity of the prepared impregnation liquid is 182 cps. In the immersion liquid, the resin is hydrolysis-resistant immersion resin, the solid content of the resin is 30 percent, the hundred percent modulus of the resin is 60, the tensile strength is more than 35MPa, the elongation is more than or equal to 400, and the viscosity is 10 ten thousand. The pressure of the oil-impregnated press roll in the impregnation tank is 5.5 Kg. The sugar degree of the pre-coagulated liquid in the pre-coagulation tank is 35%. The pressure of the pre-solidified oil press roller in the pre-solidifying groove is 5.3 Kg. The ironing temperature of the ironing device was 50 ℃. The scrape coated fabric is prepared from resin: dimethylformamide: fluorine-free filler: hydrolysis resistance auxiliary agent: the color paste is prepared from the following components in parts by weight of 100: 45: 3: 1.5: 2, adding the mixture, and stirring the prepared fabric at a high speed of 1000r/min for 31 minutes at normal temperature. After the fabric is stirred uniformly at a high speed, vacuum defoaming is carried out for 90min at the stirring speed of 260r/min, and the viscosity of the prepared fabric is 9000 cps. In the fabric, the resin is polyester-polyether blended resin, the solid content of the resin is 35%, the hundred percent modulus of the resin is 60, the tensile strength is more than 45MPa, the elongation is more than or equal to 500, and the viscosity is 16.7 ten thousand. The coating gap of the coating knife was 225 filaments. The coating weight of the coating knife was 1.50 kg/y.

In step S2, the sugar degree of the coagulation liquid in the triple-turn coagulation tank is 16.4%. The temperature of the solidification liquid in the triple-reverse-flow solidification tank is 32 ℃. Before the synthetic leather enters a rinsing bath, measuring the thickness of the synthetic leather, and controlling the thickness to be 1.45 mm. Before the synthetic leather enters a rinsing bath, measuring the width of the synthetic leather, and controlling the width at 1.49 m. The water washing tanks are provided with 15 groups, the water washing sugar degrees of the front six groups of water washing tanks are controlled to be 10%, the water washing sugar degrees of the middle six groups of water washing tanks are controlled to be 2%, and the water washing sugar degrees of the rear three groups of water washing tanks are 0%. The water washing temperature of the last three groups of water washing tanks is controlled at 75 ℃.

In the step S3, the pre-ironing temperature of the ironing roll is 115 ℃. The drying ovens comprise 5 groups, wherein the drying temperature of the first group of drying ovens is 150 ℃, the drying temperature of the second group of drying ovens is 160 ℃, the drying temperature of the third group of drying ovens is 160 ℃, the drying temperature of the fourth group of drying ovens is 160 ℃, and the drying temperature of the fifth group of drying ovens is 140 ℃. After the drying is finished, the thickness of the rolled bass is controlled to be 1.3mm, and the width of the rolled bass is controlled to be 146 cm.

The fluorine-free anti-siphon high-density synthetic leather is prepared by the production method. The fluorine-free anti-siphon high-density synthetic leather (Bass) prepared by the production method has the advantages that the three-centimeter opposite-sticking peeling performance can reach 120N/3cm, and the softness test value is between 2.3 and 2.5; the dynamic anti-siphon of left, right side sample test respectively, at the pre-deflection processing 3000 times, there is not the infiltration condition, and the static anti-siphon of back test can reach twenty four hours and can not have the climbing phenomenon.

In the invention, the physical property results of the fluorine-free anti-siphon high-density synthetic leather test are as follows:

the following introduces a production device for producing the fluorine-free anti-siphon high-density synthetic leather of the invention:

referring to fig. 1 to 3, the production apparatus includes an unwinding cloth storage rack 1, an impregnation tank 2, a pre-coagulation tank 3, an ironing device 4, a coating table device 5, a triple-folding coagulation tank 6, a rinsing tank 7, an ironing roller 8, a first oven 9, a cooling roller 10, and a winding cloth storage rack 11, which are sequentially disposed along a production line.

In the invention, the unreeling cloth storage rack 1 is used for unreeling non-woven fabrics, and the speed of unreeling is controlled to be 9m/min in order to ensure the permeation of coating slurry.

The impregnation tank 2 is provided with impregnation slurry therein, and the impregnation tank 2 is used for impregnating the non-woven fabric, so that the impregnated non-woven fabric has the effects of good hand feeling, dynamic anti-siphon and the like.

The pre-coagulation tank 3 is internally provided with pre-coagulation liquid, and the pre-coagulation tank 3 is used for pre-coagulation treatment of non-woven fabrics so as to improve the product performance.

The ironing device 4 is used for ironing the non-woven fabric so as to facilitate the subsequent coating operation; the ironing device can adopt six wheels of ironing rollers.

The coating device 5 is used for coating the blended fabric onto the non-woven fabric in a blade mode so as to achieve the effects of water resistance, siphon prevention, high elasticity and the like. In a specific embodiment, the coating station device 5 has a coating knife 51, and the non-woven fabric is scraped and coated on the non-woven fabric by the coating knife 51 when the non-woven fabric passes through the coating station device 5. In order to make the coating layer have a certain thickness, the gap between the coating blade 51 and the nonwoven fabric is set to 225 ± 5 filaments.

The three-fold coagulating tank 6 is internally provided with coagulating liquid, and the three-fold coagulating tank 6 is used for coagulating the non-woven fabric coated with the fabric so as to enable the fabric to permeate into the non-woven fabric to form the synthetic leather.

The washing tank 7 is internally provided with a washing liquid, and the washing tank 7 is used for washing the synthetic leather to obtain the bass.

The ironing roller 8 is used for carrying out pre-ironing treatment on the bass; the ironing roller 8 is an eight-wheel ironing roller.

The first oven 9 is used for drying the bass.

The cooling roller 10 is used for cooling the dried bass so as to facilitate rolling. In order to achieve a better cooling effect, the cooling rolls 10 have at least 2.

And the winding and cloth storage rack 11 is used for winding the cooled bass.

In the invention, a waterproof agent groove 12 and a second oven 13 are arranged in sequence before the cloth unreeling and storing rack 1. The water repellent agent groove 12 is provided with a water repellent agent, and the water repellent agent groove 12 is used for performing water repellent treatment on the non-woven fabric so as to enable the non-woven fabric to obtain a water repellent function. The second oven 13 is used for drying the nonwoven fabric subjected to the waterproof treatment.

In the invention, a first press roller 14 is arranged between the unreeling cloth storage rack 1 and the impregnation groove 2, and the first press roller 14 is used for flattening the unreeled non-woven fabric. The impregnation tank 2 and the pre-coagulation tank 3 are provided with a second press roller 15, and the second press roller 15 is used for pressing and rolling the impregnated non-woven fabric.

In the invention, a first guide roller 16 is arranged between the three-fold coagulation tank 6 and the washing tank 7, and the first guide roller 16 is used for guiding the coagulated synthetic leather into the washing tank 7 for washing.

In the present invention, the impregnation tank 2 has an oil impregnation pressure roller 21 therein, and the oil impregnation pressure roller 21 is used to press the unwound nonwoven fabric into the impregnation tank 2 for impregnation. Since too large or too small pressure may affect the impregnation effect, the pressure of the oil-impregnated press roller 21 needs to be controlled to be 5-5.5Kg in order to ensure the impregnation effect, and if too large pressure may affect the vehicle speed or press the nonwoven fabric to be deformed.

In the present invention, the pre-coagulation tank 3 has a pre-coagulation oil pressure roller 31 therein, and the pre-coagulation oil pressure roller 31 is used for pressing the nonwoven fabric into the pre-coagulation tank 3 for pre-coagulation. Since too large or too small pressure will affect the pre-setting effect, the pressure of the pre-setting oil pressing roller 31 needs to be controlled between 5-5.5Kg to ensure the pre-setting effect, and if too large pressure may affect the vehicle speed or press the non-woven fabric into shape.

In the concrete implementation of the invention, in order to achieve a better pre-solidification effect, 5 pre-solidification oil pressing rollers 31 are arranged in the pre-solidification groove 3, wherein 3 pre-solidification oil pressing rollers 31 are positioned at the position close to the bottom, 2 pre-solidification oil pressing rollers 31 are positioned at the position close to the upper part of the liquid level, and the pre-solidification oil pressing roller 31 at the bottom and the pre-solidification oil pressing roller 31 at the upper part are arranged in a staggered manner. Therefore, the non-woven fabric can be folded back up and down for many times in the pre-coagulation tank 3, thereby realizing better pre-coagulation effect.

In the present invention, the three-fold coagulation tank 6 has a coagulation hydraulic roller 61 for performing three-fold from bottom to top, and the coagulation hydraulic roller 61 is used to press the nonwoven fabric into the three-fold coagulation tank 6 and coagulate the nonwoven fabric. In the invention, 2 solidification oil pressure rollers 61 are arranged at two ends in the three-fold coagulation tank 6, and the solidification oil pressure rollers 61 at two ends are arranged in a staggered way, so that the non-woven fabric can be subjected to three-fold from bottom to top in the three-fold coagulation tank 6. Meanwhile, in order to make the solidification more sufficient and ensure the full penetration of the slurry, the length of the triple-turn solidification tank 6 is set to be 30 meters.

In the invention, the washing tanks 7 are provided with 15 groups, the inlet end and the outlet end of each group of washing tanks 7 are provided with third press rolls 71, and each group of washing tanks 7 is internally provided with a washing oil press roll 72. Wherein, the third press roller 71 is used for carrying out press-binding treatment on the synthetic leather in the water inlet and outlet washing tank 7; the water washing oil pressing roller 72 is used for pressing the synthetic leather into the water washing tank 7 for water washing. The purpose of the invention is to provide 15 groups of rinsing tanks 7 to fully rinse the synthetic leather, and in the 15 groups of rinsing tanks 7, the rinsing sugar degree of the rinsing liquid is gradually reduced from front to back.

In the present invention, the first ovens 9 have 5 sets, and each set of the first ovens 9 has a second guide roller 91 therein. In specific implementation, the second guide rollers 91 can be respectively arranged on different sides of the upper end and the lower end of each first oven 9, so that the bass can be bent in a Z shape in the first oven 9, and the drying effect can be improved. Meanwhile, 5 groups of first ovens 9 are provided to achieve sufficient drying of the bass.

In the present invention, the water repellent agent tank 12 has a water repellent oil pressing roller 121 therein, and the water repellent oil pressing roller 121 presses the nonwoven fabric into the water repellent agent tank 12 to perform water repellent treatment. The second oven 13 has a third guide roller 131 therein. In specific implementation, the third guiding rollers 131 can be respectively arranged on different sides of the upper end and the lower end of the second oven 13, so that the non-woven fabric can be bent in a zigzag manner in the second oven 13, and the drying effect can be improved.

Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.

Claims

1. A production method of fluorine-free anti-siphon high-density synthetic leather is characterized by comprising the following steps: the production method comprises the following steps:

2. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the thickness of the nonwoven fabric is 0.65 to 0.75 mm.

3. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 2, characterized in that: the gram weight of the non-woven fabric is 195-205g/m²。

4. The fluorine-free anti-siphon high density of claim 3The production method of the synthetic leather is characterized by comprising the following steps: the burst of the non-woven fabric is 17kgf/cm²。

5. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 4, characterized in that: the tensile strength of the non-woven fabric is more than 120N in the warp direction and more than 70N in the weft direction.

6. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 5, characterized in that: the elongation at break is more than 80% in warp direction and more than 170% in weft direction.

7. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 1, characterized in that: in the step S1, the thickness of the nonwoven fabric is 0.85 to 0.95 mm.

8. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 7, characterized in that: the gram weight of the non-woven fabric is 235-245g/m²。

9. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 8, characterized in that: the burst of the non-woven fabric is 18kgf/cm²。

10. The production method of the fluorine-free anti-siphon high-density synthetic leather according to claim 9, characterized in that: the tensile strength of the non-woven fabric is greater than 140N in the warp direction and greater than 80N in the weft direction.