CN108867084A - A kind of production method of the superfine fiber chemical leather with three proofings function - Google Patents

Abstract

A production method of superfine fiber synthetic leather with three-proof function, using superfine fiber synthetic leather base cloth as the base material, passing through the dipping tank equipped with impregnation solution A, drying after rolling, and passing through the three-proof finishing solution B The immersion tank is used, the liquid is squeezed and dried, and the above is repeated 2 to 3 times, and the superfine fiber synthetic leather with three anti-functions is obtained by kneading the skin. The present invention adopts all environmentally friendly materials and the composite technology of layer-by-layer self-assembly, so that anionic and water-based polyurethane and weakly cationic fluorine-containing acrylic resin are fixed to each other, and endow the superfine fiber synthetic leather base fabric with good waterproof, oil-proof and anti-corrosion properties. Anti-fouling properties, to obtain superfine fiber synthetic leather with three anti-functions, which can pass AATCC22, AATCC118, AATCC124 tests and lotion standards, with good waterproof, oil-proof and anti-fouling properties, can be used for automotive interiors, outdoor products, shoes Manufacture of products such as classes, sofas, bags.

Description

A kind of production method of superfine fiber synthetic leather with three anti-functions

technical field

The invention relates to the technical field of ultrafine fiber synthetic leather, in particular to a production method of ultrafine fiber synthetic leather with three-proof functions.

Background technique

Due to the limited resources of raw leather used to produce natural leather, and the production of natural leather is a process of high energy consumption and high pollution, it will bring a huge pollution load to the environment. In recent years, developed countries such as the European Union have also proposed new standards for the safety of natural leather itself, strictly restricting the presence of toxic chemicals such as Cr(VI), azo dyes, pentachlorophenol (PCP) and free formaldehyde in natural leather. . From the perspective of raw leather resources, environmental protection, product safety and market, the production and use of natural leather are facing great challenges.

For the above reasons, countries all over the world are accelerating the development of new materials to replace natural leather. Among them, the development of microfiber synthetic leather can be called a model of the combination of new materials. Ultrafine fiber synthetic leather is made of ultrafine fiber nonwoven as the base material, impregnated with polyurethane slurry with open-pore structure, and processed through a series of complicated processes. Since the diameter of the microfiber almost reaches the nanoscale size and has a huge specific surface area, it is very similar to the bundled collagen fibers in natural leather, and can be compared with natural leather in terms of physical properties. It has completed the transformation from "imitation" to " The process of "transformation" becomes the best material to replace natural leather.

China is a major producer of natural leather in the world, and its total production ranks first in the world. However, due to the shortage of raw leather and environmental pollution, the continuous decline of my country's leather industry is inevitable. What we can learn from is the successful experience of Japan. When the Japanese leather industry declined, it took the lead in developing high-performance ultra-fine fiber synthetic leather, which promptly filled the gap left by the decline of the natural leather industry and became the world's ultra-fine fiber synthetic leather. The country with the most advanced fiber synthetic leather technology has monopolized the high-end market of high-end microfiber synthetic leather products.

Coincidentally, China is also a big producer of synthetic leather, and its total production ranks first in the world. According to the data of Synthetic Leather and Artificial Leather Information Network, the consumption of artificial leather and synthetic leather in my country in 2013 was 4.292 billion square meters, an increase of 10.42% over the previous year. Driven by the industrial upgrading and transformation of the synthetic leather industry, the growth rate of demand for high-end microfiber synthetic leather is significantly higher than the industry average. The effective production capacity is about 120 million square meters, and the future market demand growth rate will reach more than 20%.

However, my country's microfiber synthetic leather products have always been in the middle and low-end position of similar products. Compared with Japan and other countries, there is still a considerable gap. It is necessary to accelerate the upgrading of my country's microfiber synthetic leather products, technological progress and industrial development upgrade. Among them, the development of functional microfiber synthetic leather is the main development direction of high-end microfiber synthetic leather in the future.

Contents of the invention

For overcoming the problems in the prior art, the purpose of the invention is to provide a kind of production method of the microfiber synthetic leather with three anti-functions.

To achieve the above object, the present invention adopts the following technical solutions:

A method for producing superfine fiber synthetic leather with three-proof function, comprising the following steps:

(1) take the superfine fiber synthetic leather base cloth as base material, pass through the dipping tank that dipping solution A is housed, dry after squeezing liquid, obtain pretreatment base cloth A;

(2) Taking the pretreatment base cloth A as the base material, passing through the dipping tank equipped with the three-proof finishing solution B, drying after squeezing the liquid, and obtaining the pretreatment base cloth B;

(3) Using the pretreated base cloth B as the base material, repeating steps (1) and (2) 2 to 3 times to obtain a pretreated base cloth C;

(4) Using the pretreated base cloth C as the base material, by kneading the skin, obtain the superfine fiber synthetic leather with three-proof function.

The further improvement of the present invention is that the impregnation solution A is prepared by the following process: in parts by weight, 10-15 parts of anionic water-based polyurethane, 0.02-0.1 parts of aziridine and 50-60 parts of water, Stir and mix evenly to obtain impregnation solution A.

The further improvement of the present invention is that the anionic waterborne polyurethane is carboxylic acid type waterborne polyurethane or sulfonic acid type waterborne polyurethane.

The further improvement of the present invention is that the specific process of step (1) is as follows: pass the superfine fiber synthetic leather base cloth through the dipping tank equipped with dipping solution A, and then pass through the rollers to control the impregnation amount of dipping solution A to be superfine fiber synthetic leather. 60-80% of the weight of the leather base cloth, and then pass through an oven and dry under the condition of 100°C-120°C to obtain the pretreated base cloth A.

5. a kind of production method of the superfine fiber synthetic leather with three anti-functions according to claim 1, is characterized in that, described three anti-finishing liquid B is made through the following process: in parts by weight, 15 ～20 parts of waterproofing agent and 70～80 parts of water are stirred and mixed evenly to obtain the three-proof finishing liquid B.

The further improvement of the present invention lies in that the waterproofing agent is a weak cationic fluorine-containing acrylic resin emulsion.

The further improvement of the present invention is that the specific process of the step (2) is as follows: pass the pretreatment base cloth A through the dipping tank equipped with the three-proof finishing solution B, and then pass through the rollers to control the impregnation amount of the three-proof finishing solution B to be pre-treated. Treat 50-70% of the weight of base cloth A, then pass through an oven, dry at 100°C-120°C, and then dry at 140°C-150°C for 2 minutes to obtain pretreated base cloth B.

The further improvement of the present invention is that the specific process of kneading skin described in step (4) is as follows: pass the pretreated base cloth C through a synthetic leather kneading machine, control the temperature at 100°C-120°C, and knead the skin for 3 to 5 minutes , to obtain superfine fiber synthetic leather with three anti-functions.

The further improvement of the present invention is that the superfine fiber synthetic leather base cloth is an island-fixed microfiber synthetic leather base cloth or a non-island-fixed microfiber synthetic leather base cloth that has been buffed and napped.

Compared with the prior art, the present invention has beneficial effects: First, the invention uses environmentally friendly materials and layer-by-layer self-assembly composite technology to make the anionic water-based polyurethane in the immersion solution A and the weak cationic fluorine-containing The acrylic resins are mutually fixed, endowing the superfine fiber synthetic leather base cloth with good waterproof, oil-proof and anti-fouling properties, and obtain superfine fiber synthetic leather with three anti-functions; second, the present invention uses all clean materials, and the production process is safe and environmentally friendly . It can pass AATCC22, AATCC118, AATCC124 tests and lotion standards, and has good waterproof, oil-proof and anti-fouling properties. It can be used in the manufacture of automotive interiors, outdoor products, footwear, sofas, and bags.

Detailed ways

The present invention will be further described in detail through specific embodiments below, but the present invention is not limited to these examples.

The invention provides a production method of ultra-fine fiber synthetic leather with three-proof function, all of which adopt environmentally friendly materials and layer-by-layer self-assembly composite technology, so that anionic and water-based polyurethane and weak cationic fluorine-containing acrylic resin are fixed to each other , endow the superfine fiber synthetic leather base fabric with good waterproof, oil-proof and anti-fouling properties, and obtain a superfine fiber synthetic leather with three anti-functions, which can pass AATCC22, AATCC118, AATCC124 tests and lotion standards, and has good waterproof, Anti-oil and anti-fouling properties, it can be used in the manufacture of automotive interiors, outdoor products, footwear, sofas, and bags.

Concrete production method comprises the following steps:

(1) Take the superfine fiber synthetic leather base cloth as the base material, pass through the dipping tank equipped with impregnating solution A, and pass through the drying oven after squeezing the liquid to obtain the pretreated base cloth A; the specific process is as follows:

Superfine fiber synthetic leather base cloth is passed through the dipping tank that dipping solution A is housed, then by roll, the impregnation amount of controlling dipping solution A is 60-80% of superfine fiber synthetic leather base cloth weight, then by oven, at 100 ℃-120 ℃ under the condition of drying, to obtain the pretreatment base cloth A.

Wherein, the preparation process of the impregnation solution A is as follows: in parts by weight, 10-15 parts of anionic water-based polyurethane (solid content 30-35%), 0.02-0.1 parts of aziridine and 50-60 parts of water, fully stirred and mixed to obtain impregnation solution A. Among them, anionic water-based polyurethane includes various anionic water-based polyurethanes, such as carboxylic acid-based water-based polyurethane, sulfonic acid-based water-based polyurethane, etc. Aziridine is a water-based polyurethane crosslinking agent, preferably HS-100 from Dongguan Rongsui Industrial Investment Co., Ltd.

The microfiber synthetic leather base cloth can be island-fixed microfiber synthetic leather base cloth, or non-island-fixed microfiber synthetic leather base cloth, and the microfiber synthetic leather base cloth must be ground and fleece finishing.

(2) Take the pretreatment base cloth A as the base material, pass through the dipping tank equipped with the three-proof finishing solution B, and dry it in an oven after squeezing the liquid to obtain the pretreatment base cloth B; the specific process is as follows:

Pass the pre-treated base cloth A through the dipping tank equipped with the three-proof finishing solution B, and then pass through the rollers, control the impregnation amount of the three-proof finishing solution B to be 50-70% of the weight of the pre-treated base cloth A, and then pass through the oven at 100°C Dry at -120°C, and then dry at 140°C-150°C for 2 minutes to obtain a pretreated base cloth B.

Wherein, the preparation process of the three-proof finishing solution B is as follows: in parts by weight, 15-20 parts of water repellent and 70-80 parts of water are fully stirred and mixed to obtain the three-proof finishing solution B. Among them, the waterproofing agent is a weak cationic fluorine-containing acrylic resin emulsion that does not contain prohibited substances such as APEO, PFOA, and PFOS, such as ANFONE Durable three-proof finishing agent RH-5492, ANFONE Durable three-proof finishing agent RH-3882, ANFONE Durable three-proof finishing agent RH-6492, etc.

(3) Using the pretreated base cloth B as the base material, repeating steps (1) and (2) 2 to 3 times to obtain a pretreated base cloth C;

(4) Using the pretreated base cloth C as the base material, by kneading the skin, obtain the superfine fiber synthetic leather with three-proof function. Among them, the kneading process is as follows: pass the pretreated base fabric C through a synthetic leather kneading machine, control the temperature at 100°C-120°C, and knead the skin for 3 to 5 minutes, and then you can get ultra-fine fiber synthetic leather with three-proof functions .

The following are specific examples.

Example 1

(1) With the island-fixed superfine fiber synthetic leather base cloth through grinding and napping finishing as the base material, pass through the dipping tank equipped with dipping solution A, and then pass through rolls to control the impregnation amount of dipping solution A to exceed 60% of the weight of the fine fiber synthetic leather base cloth is then passed through an oven and dried at 120° C. to obtain the pretreated base cloth A.

Wherein, the preparation process of the impregnation solution A is as follows: in parts by weight, 10 parts of anionic water-based polyurethane (solid content 30-35%), 0.02 parts of aziridine and 50 parts of water are fully stirred and mixed, That is, the dipping solution A was obtained. Anionic water-based polyurethane is carboxylic acid-based water-based polyurethane. Aziridine is HS-100 from Dongguan Rongsui Industrial Investment Co., Ltd.

(2) Pretreatment base cloth A is passed through the impregnating tank that three anti-finishing liquid B is housed, then by roll, the impregnation amount of control three anti-finishing liquid B is 50% of pretreatment base cloth A weight, then passes through oven, at 120 ℃, and then dried at 150 ℃ for 2 minutes to obtain the pretreated base cloth B.

Wherein, the preparation process of the three-proof finishing solution B is as follows: in parts by weight, 15 parts of water repellent and 80 parts of water are fully stirred and mixed to obtain the three-proof finishing solution B. Among them, the waterproof agent is ANFONE Durable three-proof finishing agent RH-5492.

(3) Taking the pretreatment base cloth B as the base material, repeating step (1) and step (2) twice to obtain the pretreatment base cloth C;

(4) Using the pretreated base cloth C as the base material, through a synthetic leather kneading machine, the temperature is controlled at 100° C., and the kneading time is 5 minutes to obtain a superfine fiber synthetic leather with three-proof function.

Example 2

(1) With the non-superfine fiber synthetic leather base cloth of the fixed island type through grinding and napping finishing as base material, by the dipping tank that soaking solution A is housed, then by roll, the impregnation amount of controlling soaking solution A is 70% of the superfine fiber synthetic leather base cloth weight, then by oven, dry under the condition of 110 ℃, obtain pretreatment base cloth A.

Wherein, the preparation process of the impregnation solution A is as follows: in parts by weight, 12 parts of anionic water-based polyurethane (solid content 30-35%), 0.1 part of aziridine and 52 parts of water are fully stirred and mixed, That is, the dipping solution A was obtained. Anionic waterborne polyurethane is sulfonic acid type waterborne polyurethane. Aziridine is HS-100 from Dongguan Rongsui Industrial Investment Co., Ltd.

(2) Pretreatment base cloth A is passed through the dipping tank that three anti-finishing liquid B is housed, then by roll, the impregnation amount of control three anti-finishing liquid B is 60% of pretreatment base cloth A weight, then by oven, at 110 ℃, and then dried at 140 ℃ for 2 minutes to obtain the pretreated base cloth B.

Wherein, the preparation process of the three-proof finishing solution B is as follows: in parts by weight, 20 parts of water repellent and 70 parts of water are fully stirred and mixed to obtain the three-proof finishing solution B. Among them, the waterproof agent is ANFONE Durable three-proof finishing agent RH-3882.

(3) Taking the pretreated base cloth B as the base material, repeating steps (1) and (2) 3 times to obtain a pretreated base cloth C;

(4) Using the pretreated base cloth C as the base material, through a synthetic leather kneading machine, the controlled temperature is 120° C., and the kneading time is 3 minutes to obtain a superfine fiber synthetic leather with three-proof function.

Example 3

(1) With the island-fixed superfine fiber synthetic leather base cloth through grinding and napping finishing as the base material, pass through the dipping tank equipped with dipping solution A, and then pass through the rollers to control the impregnation amount of dipping solution A to exceed 80% of the weight of the fine fiber synthetic leather base cloth is then passed through an oven and dried under the condition of 100° C. to obtain the pretreated base cloth A.

Wherein, the preparation process of the impregnation solution A is as follows: in parts by weight, 13 parts of anionic water-based polyurethane (solid content 30-35%), 0.05 parts of aziridine and 58 parts of water are fully stirred and mixed, That is, the dipping solution A was obtained. Anionic water-based polyurethane is carboxylic acid-based water-based polyurethane. Aziridine is HS-100 from Dongguan Rongsui Industrial Investment Co., Ltd.

(2) Pretreatment base cloth A is passed through the impregnating tank that three anti-finishing liquid B is housed, then by roller, the impregnation amount of control three anti-finishing liquid B is 70% of pretreatment base cloth A weight, then passes through oven, at 100 ℃, and then dried at 142 ℃ for 2 minutes to obtain the pretreated base cloth B.

Wherein, the preparation process of the three-proof finishing solution B is as follows: in parts by weight, 17 parts of water repellent and 72 parts of water are fully stirred and mixed to obtain the three-proof finishing solution B. Among them, the waterproof agent is ANFONE Durable three-proof finishing agent RH-6492.

(3) Taking the pretreatment base cloth B as the base material, repeating step (1) and step (2) twice to obtain the pretreatment base cloth C;

(4) Using the pretreated base cloth C as the base material, through a synthetic leather kneading machine, the temperature is controlled at 110° C., and the kneading time is 4 minutes to obtain a superfine fiber synthetic leather with three-proof function.

Example 4

(1) With the island-fixed superfine fiber synthetic leather base cloth through grinding and napping finishing as the base material, pass through the dipping tank equipped with dipping solution A, and then pass through rolls to control the impregnation amount of dipping solution A to exceed 65% of the weight of the fine fiber synthetic leather base cloth is then dried under the condition of 105 ℃ by an oven to obtain the pretreated base cloth A.

Wherein, the preparation process of the impregnation solution A is as follows: in parts by weight, 14 parts of anionic water-based polyurethane (solid content 30-35%), 0.07 parts of aziridine and 50 parts of water are fully stirred and mixed, That is, the dipping solution A was obtained. Anionic waterborne polyurethane is sulfonic acid type waterborne polyurethane. Aziridine is HS-100 from Dongguan Rongsui Industrial Investment Co., Ltd.

(2) The pretreatment base cloth A is passed through the dipping tank equipped with the three-proof finishing solution B, and then passed through the rollers to control the impregnation amount of the three-proof finishing solution B to be 65% of the weight of the pretreatment base cloth A, and then pass through the oven at 105 ℃, and then dried at 145 ℃ for 2 minutes to obtain the pretreated base cloth B.

Among them, the preparation process of the three-proof finishing solution B is as follows: in parts by weight, 18 parts of water repellent and 75 parts of water are fully stirred and mixed to obtain the three-proof finishing solution B. Among them, the waterproof agent is ANFONE Durable three-proof finishing agent RH-5492.

(3) Taking the pretreated base cloth B as the base material, repeating steps (1) and (2) 3 times to obtain a pretreated base cloth C;

(4) Using the pretreated base cloth C as the base material, through a synthetic leather kneading machine, the controlled temperature is 110° C., and the kneading time is 5 minutes to obtain superfine fiber synthetic leather with three-proof function.

Example 5

(1) With the island-fixed superfine fiber synthetic leather base cloth through grinding and napping finishing as the base material, pass through the dipping tank equipped with dipping solution A, and then pass through the rollers to control the impregnation amount of dipping solution A to exceed 75% of the weight of the fine fiber synthetic leather base cloth is then passed through an oven and dried at 115° C. to obtain the pretreated base cloth A.

Wherein, the preparation process of the impregnation solution A is as follows: in parts by weight, 15 parts of anionic water-based polyurethane (solid content 30-35%), 0.08 parts of aziridine and 60 parts of water are fully stirred and mixed, That is, the dipping solution A was obtained. Anionic water-based polyurethane is carboxylic acid-based water-based polyurethane. Aziridine is HS-100 from Dongguan Rongsui Industrial Investment Co., Ltd.

(2) Pretreatment base cloth A is passed through the impregnating tank that three anti-finishing liquid B is housed, then by roll, the impregnation amount of control three anti-finishing liquid B is 55% of pretreatment base cloth A weight, then by oven, at 115 ℃, and then dried at 147 ℃ for 2 minutes to obtain the pretreated base cloth B.

Wherein, the preparation process of the three-proof finishing solution B is as follows: in parts by weight, 16 parts of water repellent and 77 parts of water are fully stirred and mixed to obtain the three-proof finishing solution B. Among them, the waterproof agent is ANFONE Durable three-proof finishing agent RH-3882.

(3) Taking the pretreatment base cloth B as the base material, repeating step (1) and step (2) twice to obtain the pretreatment base cloth C;

(4) Using the pretreated base cloth C as the base material, through a synthetic leather kneading machine, the temperature is controlled at 115° C., and the kneading time is 4 minutes to obtain a superfine fiber synthetic leather with three-proof function.

The present invention adopts all environmentally friendly materials and the composite technology of layer-by-layer self-assembly, so that anionic and water-based polyurethane and weakly cationic fluorine-containing acrylic resin are fixed to each other, and endow the superfine fiber synthetic leather base fabric with good waterproof, oil-proof and anti-corrosion properties. Anti-fouling performance, to obtain superfine fiber synthetic leather with three anti-functions, which can pass AATCC22, AATCC118, AATCC124 tests and lotion standards, and has good waterproof, oil-proof and anti-fouling properties, and can be used for automotive interiors, outdoor products, shoes Manufacture of products such as classes, sofas, bags.

Claims (9)

1. a production method of superfine fiber synthetic leather with three anti-functions, is characterized in that, comprises the following steps: (1) take the superfine fiber synthetic leather base cloth as base material, pass through the dipping tank that dipping solution A is housed, dry after squeezing liquid, obtain pretreatment base cloth A; (2) Taking the pretreatment base cloth A as the base material, passing through the dipping tank equipped with the three-proof finishing solution B, drying after squeezing the liquid, and obtaining the pretreatment base cloth B; (3) Using the pretreated base cloth B as the base material, repeating steps (1) and (2) 2 to 3 times to obtain a pretreated base cloth C; (4) Using the pretreated base cloth C as the base material, by kneading the skin, obtain the superfine fiber synthetic leather with three-proof function. 2. The production method of a kind of superfine fiber synthetic leather with three-proof function according to claim 1, characterized in that, the dipping solution A is obtained through the following process: in parts by weight, 10 to 15 1 part of anionic water-based polyurethane, 0.02-0.1 part of aziridine and 50-60 parts of water, stirred and mixed evenly to obtain impregnation solution A. 3. according to claim 1 and 2 described a kind of production method of the superfine fiber synthetic leather with three anti-functions, it is characterized in that, anionic waterborne polyurethane is carboxylic acid type waterborne polyurethane or sulfonic acid type waterborne polyurethane. 4. a kind of production method of the superfine fiber synthetic leather with three anti-functions according to claim 3 is characterized in that, the concrete process of step (1) is as follows: the superfine fiber synthetic leather base cloth is impregnated The dipping tank of liquid A, and then pass through rollers to control the impregnation amount of dipping liquid A to be 60-80% of the weight of the superfine fiber synthetic leather base cloth, and then pass through an oven and dry under the condition of 100°C-120°C to obtain the pre- Process base cloth A. 5. a kind of production method of the superfine fiber synthetic leather with three anti-functions according to claim 1, is characterized in that, described three anti-finishing liquid B is made through the following process: in parts by weight, 15 ～20 parts of waterproofing agent and 70～80 parts of water are stirred and mixed evenly to obtain the three-proof finishing liquid B. 6. according to claim 1 or 5 described a kind of production method of the microfiber synthetic leather with three anti-functions, it is characterized in that, waterproofing agent is weak cationic fluorine-containing acrylic resin emulsion. 7. the production method of a kind of superfine fiber synthetic leather with three-proof function according to claim 6, is characterized in that, the concrete process of described step (2) is as follows: the pretreatment base cloth A is passed through three-proof The impregnation tank of the finishing solution B, and then pass through the rollers to control the impregnation amount of the three-proof finishing solution B to 50-70% of the weight of the pretreated base cloth A, then pass through the oven, dry under the condition of 100°C-120°C, and then Dry at 140°C-150°C for 2 minutes to obtain pretreated base cloth B. 8. a kind of production method of the microfiber synthetic leather with three anti-functions according to claim 1, is characterized in that, the concrete process of kneading skin described in step (4) is as follows: pretreatment base cloth C is passed through Synthetic leather kneading machine, the temperature is controlled at 100°C-120°C, and the kneading time is 3-5 minutes to obtain superfine fiber synthetic leather with three-proof function. 9. A kind of production method of the superfine fiber synthetic leather with three anti-functions according to claim 1, is characterized in that, described superfine fiber synthetic leather base cloth is the fixed island type through buffing and napping finishing Microfiber synthetic leather base cloth or non-stationary microfiber synthetic leather base cloth.