CN116497473A - A kind of regenerated fabric and its preparation process - Google Patents

Abstract

The application relates to the technical field of fabric preparation, and particularly discloses a regenerated fabric and a preparation process thereof. The regenerated fabric is formed by blending and weaving modified regenerated polyester fibers, sorona plant fibers and soybean protein fibers; the modified regenerated polyester fiber is prepared from the following components in parts by weight: 70-90 parts of PET reclaimed materials, 1.0-1.2 parts of itaconic anhydride-vinyl acetate copolymer microspheres, 0.8-1.2 parts of nano zinc oxide, 0.4-0.6 part of nano silver powder, 0.5-1 part of aliphatic polyurethane dispersion liquid, 0.8-1 part of surface treatment agent, 0.05-0.1 part of cross-linking agent and 0.01-0.05 part of compatilizer. The regenerated polyester fiber antistatic performance can be improved, the regenerated fabric is prepared by blending the modified regenerated polyester fiber with the sorona plant fiber and the soybean protein fiber, the moisture absorption and air permeability and antistatic performance of the fabric can be enhanced, and the application range of the regenerated fabric is widened.

Description

A kind of regenerated fabric and its preparation process

technical field

This application relates to the technical field of fabric preparation, more specifically, it relates to a recycled fabric and its preparation process.

Background technique

The continuous improvement of textile fabrics has always been an important direction for the sustainable development of the textile industry. In order to comply with the concept of green environmental protection, bio-based sources, recyclable regeneration and degradability have become research hotspots for fabric improvement. Regenerated polyester fabric is a new type of environmentally friendly recycled fabric. Its yarn is extracted from waste PET bottles. The fabric can be used in bags, home textiles, clothing and other fields. It is a kind of environmentally friendly recycled fabric with relatively mature technology. .

Since recycled polyester is obtained by chemical or physical methods from waste PET plastics, the quality and performance of recycled polyester will be worse than virgin polyester. Related technologies propose that recycled polyester fibers are blended with other functional fibers to obtain yarns and then spun into fabrics, thereby obtaining environmentally friendly recycled fabrics with excellent moisture absorption, breathability, and antistatic properties. However, blending of recycled polyester fibers with other functional fibers is prone to Static electricity makes it difficult to carry out blending processing, and the quality and performance defects of recycled polyester will affect the overall performance of the fabric.

Contents of the invention

In order to improve the antistatic properties of regenerated polyester and the moisture absorption and air permeability of regenerated fabrics, the application provides a regenerated fabric and its preparation process.

The application provides a recycled fabric, which adopts the following technical scheme:

A kind of regenerated fabric, is made by the blending of modified regenerated polyester fiber and sorona plant fiber, soybean protein fiber; Described modified regenerated polyester fiber is prepared by following components by weight:

70-90 copies of recycled PET

Itaconic anhydride-vinyl acetate copolymer microspheres 1.0-1.2 parts

Nano zinc oxide 0.8-1.2 parts

Nano silver powder 0.4-0.6 parts

Aliphatic polyurethane dispersion 0.5-1 part

Surface treatment agent 0.8-1 part

0.05-0.1 parts of crosslinking agent

0.01-0.05 parts of compatibilizer.

By adopting the above scheme, regenerated polyester fiber is obtained by physical spinning using PET recycled material, and its fiber quality and performance are worse than that of virgin polyester fiber. In this application, PET recycled material is modified. The nano-zinc oxide, nano-silver powder and itaconic anhydride-vinyl acetate copolymer microspheres are adsorbed and combined with each other in the aliphatic polyurethane dispersion. The nano-zinc oxide and nano-silver powder have excellent bactericidal and antistatic properties, and can be easily It can improve the antistatic properties of regenerated polyester fibers and endow them with antibacterial and bactericidal properties, while itaconic anhydride-vinyl acetate copolymer microspheres have active functional groups such as anhydride groups and ester groups, which have large specific surface area and strong adsorption. The surface reaction ability is strong. While forming a combination with nano-fillers in the dispersion, it can have good adhesion with PET, so that the antistatic and antibacterial properties of the fiber are more durable. On the one hand, the aliphatic polyurethane dispersion can improve The dispersion of the combination of nanomaterials and itaconic anhydride-vinyl acetate copolymer microspheres in PET recycled materials is conducive to its deep integration. On the other hand, it also repairs some defects of recycled polyester, thereby improving elongation and recovery. Elasticity, cross-linking agent and compatibilizer can assist the above substances in modifying PET recycled materials, so that the recycled polyester fiber has good antistatic properties; sorona plant fiber is a new type of biomass elastic fiber, and the fabric woven with it feels smooth , has an excellent skin-friendly feeling, soybean protein fiber is regenerated plant protein fiber, easy to biodegrade, has good environmental protection, and has good moisture absorption and air permeability, through modified recycled polyester fiber and sorona plant fiber, soybean protein fiber and Appropriate proportion blending can make the woven recycled fabric have excellent skin-friendly feeling and moisture absorption and air permeability, which broadens the application range of recycled fabrics.

Preferably, the preparation of the modified regenerated polyester fiber comprises the following steps:

Step 1, preparing modified PET slices, comprising the following steps:

a. Use a surface treatment agent to modify the surface of the nano-zinc oxide and nano-silver powder to obtain a modified nano-mixture; b. Mix the modified nano-mixture with the aliphatic polyurethane dispersion, and mechanically stir for 10-15 minutes at room temperature, Obtain a modified dispersion; then add accurately measured itaconic anhydride-vinyl acetate copolymer microspheres into the modified dispersion and stir and mix for 15-30 minutes to obtain a mixture;

c. Melting and blending the accurately measured PET recycled material with the mixture obtained in step b and the accurately measured cross-linking agent and compatibilizer to obtain a compound, and then extruding the compound to granulate and dry to obtain modified PET chips; Control the temperature condition of blending extrusion to be 265-290°C;

Step two, extrusion spinning.

By adopting the above scheme, the preparation steps of modified regenerated polyester fibers are limited, and in the treatment stage of PET recycled materials, the PET recycled materials are modified with a mixture formed by dispersing modified nanometer mixture and copolymer microspheres in aliphatic polyurethane , Supplemented with crosslinking agent and compatibilizer to make the modification of PET recycled material better, by limiting the temperature of melt blending, the obtained melt can be more easily extruded and spun, and modified recycled polyester fiber with excellent performance can be obtained .

Preferably, the step 2, the specific steps are: using the modified PET chip obtained in the step 1 as raw material, the modified regenerated polyester fiber is obtained by melting, filtering and spinning, and the spinning process parameters are: the frequency of the metering pump is 50 -60Hz, the spinning speed is 3100-3500m/min, the spinning temperature is 265-290°C, the temperature of the front hot roll is 95-100°C, the temperature of the rear hot roll is 140-150°C, the draft ratio is 3.1-3.3, The drawing temperature is 75-80°C.

By adopting the above scheme, by limiting the spinning speed, temperature and draft ratio in the spinning process, the spinning process can be carried out more easily, and the quality and performance of the spun fibers can be kept at a good level.

Preferably, in the step one (c), the mixing specifically includes the following steps: first put the recycled PET material into a screw extruder for banburying, the screw speed is 500-600r/min, and the screw speed is adjusted to 400r/min after 25-30min. -500r/min, put into the mixture obtained in step b and accurately measure the cross-linking agent and compatibilizer for blending for 1.5-2h.

By adopting the above scheme, before the components are mixed, the PET recycled material is first put into banburying, and some impurities in the PET recycled material can be eliminated under heating, and the virgin polyester fiber is in a state that is easier to modify. It is convenient to add other components for blending modification later, and the fiber quality and performance obtained by the final blending modification are better.

Preferably, the weight ratio of the nano-zinc oxide to the nano-silver powder is (1-1.6): (0.5-0.75); the average particle diameter of the nano-zinc oxide is 10-20nm; the nano-silver powder The average particle size is 20-50nm.

By adopting the above scheme, the particle size of nano-zinc oxide and nano-silver powder is limited, which can better combine the two with itaconic anhydride-vinyl acetate copolymer microspheres, and simultaneously limit the nano-zinc oxide and nano-silver powder. The weight ratio of the body can achieve a good balance between economic cost and excellent antistatic and antibacterial effect quality inspection.

Preferably, the ratio of the total mass of the nano-zinc oxide and nano-silver powder to the mass of the itaconic anhydride-vinyl acetate copolymer microspheres is (1.2-1.5):1.

By adopting the above scheme, under the weight ratio of nano-zinc oxide and nano-silver powder, limiting the mass ratio of the two to the copolymer microsphere can make the combination better.

Preferably, the surface treatment agent is γ-glycidyl etheroxypropyl trimethoxysiloxane KH-560, isopropyl distearoyloxyaluminate HY-988, hexadecyl trimethoxy One of the silane KH-1631.

By adopting the above-mentioned solution, selecting the above-mentioned surface treatment agent can better modify the surface of the nano-zinc oxide and nano-silver powder, so that the combination with the copolymer microsphere is better.

Preferably, the crosslinking agent is one of N-aminoethyl-3-aminopropylmethyldimethoxysilane, tetrabutyl titanate, polybutyl titanate; the compatibilizer is One or more of macromolecular aminosilane mixture KH-450, silicon-aluminum polymer KY-933, and γ-aminopropylmethyldiethoxysilane KH-902.

By adopting the above scheme, the selected cross-linking agent can make the combination of nano-zinc oxide, nano-silver powder and copolymer microspheres more tightly combined, and at the same time help the combination between copolymer microspheres and PET to be better. The macromolecular aminosilane mixture KH-450 can optimize the compatibility between macromolecules and inorganic substances and improve the toughness of the material; while improving the dispersion, the silicon-aluminum polymer KY-933 also maintains a certain reactivity and can capture Free radicals or polar bonds to the polymer system, resulting in a better coupling effect and improving the mechanical properties of composite materials; γ-aminopropylmethyldiethoxysilane KH-902 can improve the filling in the polymer matrix wettability and dispersibility.

Preferably, the blending ratio of the modified regenerated polyester fiber, sorona plant fiber and soybean protein fiber is (40%-65%):(20%-40%):(15%-20%).

By adopting the above solution and limiting the blending ratio of the three fibers, the moisture absorption, air permeability and antistatic performance of the woven fabric can be improved.

In the second aspect, the preparation process of a recycled fabric provided by the application is realized through the following technical solutions:

A preparation process for regenerated fabrics, comprising the following steps:

S1, blending: blending modified recycled polyester fiber with sorona plant fiber and soybean protein fiber in proportion to obtain warp yarn and weft yarn, and weaving warp yarn and weft yarn to obtain fabric blank;

S2. Pretreatment: desizing the fabric blank;

S3. Dyeing: pad the pre-treated fabric with dye solution, and then go through pre-drying, washing and drying processes to obtain dyed fabric;

S4. Post-processing: finishing the dyed fabric obtained in S3 with a finishing agent, and finally obtaining a finished recycled fabric.

By adopting the above scheme, blending modified regenerated polyester fiber with sorona plant fiber and soybean protein fiber in an appropriate ratio can make the woven fabric have better moisture absorption and air permeability, and the use of modified regenerated polyester fiber can better improve polyester fiber. The problem that the fabric blank is not easy to be colored during dyeing makes the fabric processing convenient.

In summary, the application has the following beneficial effects:

1. In this application, nano-zinc oxide, nano-silver powder and itaconic anhydride-vinyl acetate copolymer microspheres are adsorbed and combined in the dispersion, and the copolymer microspheres are combined on recycled polyester to obtain The modified regenerated polyester fiber has good antistatic properties, which is convenient for blending processing with sorona plant fiber and soybean protein fiber. Both sorona plant fiber and soybean protein fiber are environmentally friendly fibers, which add environmental protection to the recycled fabric of this application , and the fabric feels more comfortable, has good applicability, and has excellent moisture absorption and breathability;

2. The preparation method of the present application is relatively simple, the operation difficulty is low, and it is convenient to realize industrial production and manufacture.

Detailed ways

The present application will be described in further detail below in conjunction with the preparation examples, examples and comparative examples.

Preparation example

Preparation Example 1

Preparation of itaconic anhydride-vinyl acetate copolymer microspheres

A1. Add 0.56kg of itaconic anhydride, 0.43kg of vinyl acetate and 0.08kg of azobisisopropylimidazoline hydrochloride into the first container, ultrasonically dissolve in 800mL of butyl acetate, and pass N ₂ for 30 minutes;

A2. Place the first container with reactants in an oil bath at 85°C, and react in _N atmosphere for 6 hours;

A3. After the reaction, centrifuge the product for 10 minutes, pour off the supernatant and wash the precipitate with the first solvent, then wash with petroleum ether, and then dry the centrifuged product in a vacuum oven at 100°C to obtain itaconic anhydride-vinyl acetate copolymer Microspheres.

Preparation example 2

Preparation of Modified Regenerated Polyester Fiber

Modified recycled polyester fiber is prepared from the following components: 72kg of recycled PET, 1.0kg of itaconic anhydride-vinyl acetate copolymer microspheres, 0.8kg of nano-zinc oxide, 0.4kg of nano-silver powder, and 0.5kg of aliphatic polyurethane dispersion , Surface treatment agent 1.0kg, crosslinking agent 0.08kg, compatibilizer 0.02kg.

Among them, PET recycled materials are obtained by crushing waste PET plastics into flakes, separating PET impurities, washing, drying and granulating waste PET fragments.

Itaconic anhydride-vinyl acetate copolymer microspheres were obtained in Preparation Example 1. The average particle diameter of the nano-zinc oxide is 20nm, and the average particle diameter of the nano-silver powder is 50nm. The aliphatic polyurethane dispersion adopts PU570FN self-dulling aliphatic aqueous polyurethane dispersion.

The surface treatment agent adopts hexadecyltrimethoxysilane KH-1631, and the crosslinking agent adopts N-aminoethyl-3-aminopropylmethyldimethoxysilane (CAS No. 3069-29-2), which is compatible with The agent is silica aluminum polymer KY-933.

The specific preparation process of modified recycled polyester fiber is as follows:

Step 1. Preparation of modified PET slices

a. Use a surface treatment agent to modify the surface of nano-zinc oxide and nano-silver powder to obtain a modified nano-mixture: disperse 1.0kg hexadecyltrimethoxysilane KH-1631 in 100ml ethanol aqueous solution, and then Add the metered nano-zinc oxide and nano-silver powder into it, stir and react at 75°C for 4 hours, then filter through the funnel, and dry the filtered mixture in a 100°C drying oven to obtain the treated Nano-zinc oxide; the treatment of nano-silver powder is the same as the above operation. Then the treated nano-zinc oxide is mixed with nano-silver powder to obtain a modified nano-mixture.

b. Mix the modified nano-mixture with PU570FN aliphatic polyurethane dispersion, and stir mechanically at 25°C for 10 minutes to obtain a modified dispersion; then add accurately measured itaconic anhydride-vinyl acetate copolymer microspheres into the modified dispersion Stir and mix in medium for 25min to obtain the mixture;

c. Mix the accurately measured PET recycled material with the mixture obtained in step b and the accurately measured cross-linking agent and compatibilizer in the screw extruder for 1.5 hours, and then extrude the mixed material to granulate: mix the mixed material at 265- Melt into fluid at 290°C, the first temperature zone is 265-270°C, the second temperature zone is 270-275°C, the third temperature zone is 275-285°C, the fourth temperature zone is 285-290°C, the die head temperature 285-295°C, the extruded molten material is injected into the granulator and dried to obtain modified PET chips;

Step 2. Extrusion and spinning

The modified PET chips obtained in step 1 are used as raw materials, and modified recycled polyester fibers are obtained by melting, filtering, and spinning. The filament temperature is 265-290°C, the temperature of the front hot roll is 100°C, the temperature of the rear hot roll is 148°C, the draw ratio is 3.2, and the draw temperature is 75°C.

Thus the modified regenerated polyester fiber is prepared.

Preparation example 3

The difference between Preparation Example 3 and Preparation Example 2 is that in Step 1 (c), the mixing specifically includes the following steps: put the recycled PET material into the screw extruder for banburying, the screw speed is 550r/min, and adjust the screw speed after 25min 450r/min, put into the mixture obtained in step b and accurately measure the cross-linking agent and compatibilizer for blending for 1.5h.

Preparation Example 4

The difference between Preparation Example 4 and Preparation Example 2 is that the total amount of nano-zinc oxide and nano-silver powder remains unchanged, and the weight ratio of nano-zinc oxide to nano-silver powder is 1.6:0.75.

Preparation Example 5

The difference between Preparation Example 5 and Preparation Example 2 is that the total amount of nano-zinc oxide and nano-silver powder remains unchanged, and the weight ratio of nano-zinc oxide to nano-silver powder is 1.1:0.6.

Preparation Example 6

The difference between Preparation Example 6 and Preparation Example 5 is that the ratio of the total mass of nano-zinc oxide and nano-silver powder to the mass of itaconic anhydride-vinyl acetate copolymer microspheres is 1.8:1, using 1.0kg itaconic anhydride- Vinyl acetate copolymer microspheres are matched with 1.16kg nano-zinc oxide and 0.64kg nano-silver powder.

Preparation Example 7

The difference between Preparation Example 7 and Preparation Example 5 is that the ratio of the total mass of nano-zinc oxide and nano-silver powder to the mass of itaconic anhydride-vinyl acetate copolymer microspheres is 1.5:1, using 1.0kg itaconic anhydride- Vinyl acetate copolymer microspheres are matched with 0.97kg nano-zinc oxide and 0.53kg nano-silver powder.

Preparation example 8

The difference between Preparation Example 8 and Preparation Example 5 is that the ratio of the total mass of nano-zinc oxide and nano-silver powder to the mass of itaconic anhydride-vinyl acetate copolymer microspheres is 1.4:1, using 1.0kg itaconic anhydride- Vinyl acetate copolymer microspheres are matched with 0.91kg nano-zinc oxide and 0.49kg nano-silver powder.

Preparation Example 9

The difference between Preparation Example 9 and Preparation Example 2 is that the total amount of nano-zinc oxide and nano-silver powder remains unchanged, and the weight ratio of nano-zinc oxide to nano-silver powder is 0.8:0.5.

Preparation Example 10

The difference between Preparation Example 10 and Preparation Example 2 is that the total amount of nano-zinc oxide and nano-silver powder remains unchanged, and the weight ratio of nano-zinc oxide to nano-silver powder is 0.8:1.

Preparation Example 11

The difference between Preparation Example 11 and Preparation Example 5 is that the ratio of the total mass of nano-zinc oxide and nano-silver powder to the mass of itaconic anhydride-vinyl acetate copolymer microspheres is 1:1, using 1.0kg itaconic anhydride- Vinyl acetate copolymer microspheres are matched with 0.65kg nano-zinc oxide and 0.35kg nano-silver powder.

Preparation Example 12

The difference between Preparation Example 12 and Preparation Example 5 is that the ratio of the total mass of nano-zinc oxide and nano-silver powder to the mass of itaconic anhydride-vinyl acetate copolymer microspheres is 2:1, using 1.0kg itaconic anhydride- Vinyl acetate copolymer microspheres are matched with 1.3kg nano-zinc oxide and 0.7kg nano-silver powder.

Example

Example 1

A recycled fabric made of blended modified recycled polyester fiber, sorona plant fiber and soybean protein fiber. The blending ratio is 40% modified recycled polyester fiber, 40% sorona plant fiber, and 20% soybean protein fiber. Wherein, the modified regenerated polyester fiber is obtained from Preparation Example 2.

A preparation process for regenerated fabrics, comprising the following steps:

S1, blending: blending modified recycled polyester fiber with sorona plant fiber and soybean protein fiber in proportion to obtain yarn, and weaving warp and weft of yarn to obtain fabric blank;

S2. Pre-treatment: desizing the fabric blank, using scouring desizing agent S-310A to desizing the fabric blank at 110°C;

S3. Dyeing: Pad the pre-treated fabric with dye solution at 125°C, and then go through the pre-drying, washing and re-drying processes after 20 minutes to obtain the dyed fabric;

S4. Post-processing: the dyed fabric obtained in S3 is finished with polyester finishing agent MT-110, and finally the finished recycled fabric is obtained.

Example 2

The difference between Example 2 and Example 1 is that the modified regenerated polyester fiber obtained in Preparation Example 3 is used for blending.

Example 3

The difference between Example 3 and Example 1 is that the modified regenerated polyester fiber obtained in Preparation Example 4 is used for blending.

Example 4

The difference between Example 4 and Example 1 is that the modified regenerated polyester fiber obtained in Preparation Example 5 is used for blending.

Example 5

The difference between Example 5 and Example 4 is that the modified regenerated polyester fiber obtained in Preparation Example 6 is used for blending.

Example 6

The difference between Example 6 and Example 4 is that the modified regenerated polyester fiber obtained in Preparation Example 7 is used for blending.

Example 7

The difference between Example 7 and Example 4 is that the modified regenerated polyester fiber obtained in Preparation Example 8 is used for blending.

Example 8

The difference between embodiment 8 and embodiment 1 is that the blending ratio is 65% modified regenerated polyester fiber, 20% sorona plant fiber, and 15% soybean protein fiber.

Example 9

The difference between embodiment 9 and embodiment 1 is that the blending ratio is 55% modified regenerated polyester fiber, 27% sorona plant fiber, and 18% soybean protein fiber.

comparative example

Comparative Example 1: a recycled fabric, the difference from Example 1 is that the modified recycled polyester fiber obtained in Preparation Example 9 is used for blending.

Comparative Example 2: A recycled fabric, the difference from Example 1 is that the modified recycled polyester fiber obtained in Preparation Example 10 is used for blending.

Comparative Example 3: a recycled fabric, the difference from Example 4 is that the modified recycled polyester fiber obtained in Preparation Example 11 is used for blending.

Comparative Example 4: A recycled fabric, the difference from Example 4 is that the modified recycled polyester fiber obtained in Preparation Example 12 is used for blending.

Comparative Example 5: a recycled fabric, the difference from Example 1 is that the blending ratio is 70% modified recycled polyester fiber, 10% sorona plant fiber, and 20% soybean protein fiber.

Comparative example 6: a recycled fabric, the difference from Example 1 is that the blending ratio is 65% modified recycled polyester fiber, 30% sorona plant fiber, and 5% soybean protein fiber.

Comparative Example 7: a recycled fabric, the difference from Example 1 is that the blending ratio is 70% modified recycled polyester fiber, 5% sorona plant fiber, and 25% soybean protein fiber.

performance test

Detection method

Experiment 1, fiber antistatic performance: According to FZ/T 50035-2016 "Synthetic Filament Filament Resistance Test Method", the antistatic performance of the modified regenerated polyester fiber prepared in Preparation Example 2-12 was measured. Take a 100mm-long fiber, stick conductive glue on both ends of the fiber, use EST121 digital ultra-high resistance micro-current meter to test the resistance value of the fiber at a distance of 100mm, the test voltage is (100±5)V, measure 5 times to get the average value , to calculate the volume specific resistance of the fiber.

Experiment 2. Tensile properties of fibers: According to GB/T 14344-2003 "Test Method for Tensile Properties of Synthetic Fiber Filaments", test the tensile properties of the modified regenerated polyester fiber prepared in Preparation Example 2-12, and set the tensile speed to 100mm /min, gauge 25cm, pretension 0.05cN/dtex. The instrument used is YG-061-1500 tensile strength machine.

Experiment 3. Air permeability of fabrics: The size of the cut sample is 100mm*100mm, according to GB/T 5453-1997 "Determination of the air permeability of textile fabrics", the embodiment 1/8/9 and the comparative example 5/6 before and after washing 30 times /7 The air permeability of the woven fabric is tested, and the instrument used is the air permeability tester TQD-G1.

Experiment 4. Hygroscopicity of fabrics: use 101-0 electric blast drying oven, YG175 constant temperature and humidity box, and test washing 30 times according to GB/T 9995-1997 "Determination of moisture content and moisture regain of textile materials - oven drying method" The fabrics woven in Examples 1/8/9 and Comparative Examples 5/6/7 before and after were tested for hygroscopicity.

Experiment 5. Fabric antistatic performance: cut the sample size to 10mm*10mm, and balance it for more than 12 hours in a constant temperature and humidity environment (20°C, humidity 70%), test the resistance value with an insulation resistance tester, and take the average value of 20 times Value, obtain the embodiment 1-9 before and after washing 30 times and the surface specific resistance value of comparative example 1-7 sample to evaluate the antistatic performance of woven fabric.

Test results

The performance test results of Preparation Examples 2-12, Examples 1-9 and Comparative Examples 1-7 are shown in Table 1-3.

The fiber property test data of table 1 preparation example 2-12

Comparing the modified regenerated polyester fiber obtained in Preparation Example 2 and Preparation Example 3 and combining it with Table 1, it can be known that the recycled PET material is first heated and banburyed and then mixed with the modified substances of each component, so that the modified recycled polyester fiber obtained can be The antistatic properties and tensile properties of the fibers have been improved, indicating that the banburying treatment of PET recycled materials is conducive to better combination of modified substances with PET materials, and antistatic and antibacterial modification of them.

Comparing Preparation Example 2 and Preparation Example 4/5/9/10 and in conjunction with Table 1, it can be seen that under the constant situation of the total consumption of nano-zinc oxide and nano-silver powder, the consumption of nano-zinc oxide and nano-silver powder material is relatively The antistatic properties of modified recycled polyester fibers have a greater impact. When the proportion of nano-zinc oxide is too large or too small, the effect of improving the antistatic properties of fibers is weakened, and considering the cost of nanomaterials, From the overall effect, when the total amount of nano-zinc oxide and nano-silver powder is constant, the antistatic performance of the fiber is the best when the weight ratio of nano-zinc oxide to nano-silver powder is 1.1:0.6.

Comparing Preparation Example 5 with Preparation Example 6/7/8/11/12 and in conjunction with Table 1, it can be seen that when the ratio of nano-zinc oxide and nano-silver powder is fixed, itaconic anhydride-vinyl acetate copolymer microspheres and nanomaterials The ratio between the total amount of fiber also has a great influence on the antistatic modification. When the total amount of nanomaterials is too large, the binding amount of itaconic anhydride copolymer microspheres will reach the peak, and the excess nanomaterials are directly combined with PET materials, the connection is not tight enough and the dispersion is not good, and when the nanomaterials If the total amount is too small, the effect of antistatic improvement is not good. From the comprehensive effect, when the ratio of the total mass of nano-zinc oxide and nano-silver powder to the mass of itaconic anhydride-vinyl acetate copolymer microspheres is 1.4:1, The antistatic property and mechanical property of the modified recycled polyester fiber obtained are good.

The moisture absorption and gas permeability test data of table 2 embodiment 1/8/9 and comparative examples 5-7

Comparing Example 1/8/9 and Comparative Example 5/6/7 and in conjunction with Table 2, it can be known that the blending ratio of modified regenerated polyester fiber and sorona plant fiber and soybean protein fiber is within the range of ratios defined by the application. It has a large utilization rate for waste PET plastics, and can also ensure that the woven fabric has good moisture absorption and air permeability. When the proportion of modified recycled polyester fiber and soybean protein fiber used in blending is too large or too small, the fabric The hygroscopicity and air permeability will be reduced, and in the blending ratio of the three fibers, in general, when 55% modified recycled polyester fiber, 27% sorona plant fiber and 18% soybean protein fiber are blended Woven recycled fabrics are optimal for moisture wicking and breathability.

The antistatic property test data of table 3 embodiment 1-9 and comparative example 1-7

Performance Testing Before washing/10 ⁹ Ω·cm After washing/10 ⁹ Ω·cm Example 1 1.2 2.1 Example 2 1.0 2.3 Example 3 1.6 2.8 Example 4 0.9 1.6 Example 5 1.1 2.2 Example 6 0.6 1.5 Example 7 0.7 1.5 Example 8 1.0 1.8 Example 9 0.8 1.7 Comparative example 1 1.8 2.7 Comparative example 2 1.0 2.2 Comparative example 3 1.5 2.9 Comparative example 4 2.5 3.8 Comparative example 5 1.9 2.7 Comparative example 6 2.1 3.2 Comparative example 7 1.8 2.6

In combination with Table 3, comparing Example 1 with Examples 2-7, and Comparative Examples 1-4, under the conditions of improving the proportion of each component prepared by the modified regenerated polyester fiber and its mixing steps, the modified regenerated polyester fiber can be obtained. The antistatic property of polyester fiber is improved to some extent, and the modified regenerated polyester fiber can be better blended with sorona plant fiber and soybean protein fiber, and the antistatic property of the woven fabric is greatly improved; comparative example 1, embodiment 8 , embodiment 9 and comparative examples 5-7, under the situation of improving three kinds of fiber blending ratios, the antistatic performance of fabric can produce bigger change equally, because sorona plant fiber, soybean protein fiber also have certain antistatic performance, When blended with modified recycled polyester fiber, a synergistic effect can be produced within a certain range to further improve the antistatic performance of the fabric. From the perspective of comprehensive effects, when the blending ratio is 55% modified recycled polyester fiber, 27% sorona plant fiber, The antistatic properties of recycled fabrics are best when 18% soy protein fibers are used.

In summary, during the processing and manufacturing process of the recycled fabric of this application, the antistatic property of the recycled polyester fiber is effectively improved, so that the blending process is easy to carry out, and the recycled polyester is modified, and the sorona plant fiber and soybean protein fiber are used. Made of blended fabric, the moisture absorption and breathability of the fabric are significantly improved, which greatly broadens the application range of recycled fabrics.

This specific embodiment is only an explanation of this application, and it is not a limitation of this application. Those skilled in the art can make modifications to this embodiment without creative contribution according to needs after reading this specification, but as long as the rights of this application All claims are protected by patent law.

Claims (10)

1. The regenerated fabric is characterized in that: the modified regenerated polyester fiber is formed by blending and weaving modified regenerated polyester fibers, sorona plant fibers and soybean protein fibers; the modified regenerated polyester fiber is prepared from the following components in parts by weight:

70-90 parts of PET reclaimed material

1.0 to 1.2 portions of itaconic anhydride-vinyl acetate copolymer microsphere

0.8-1.2 parts of nano zinc oxide

0.4 to 0.6 part of nano silver powder

Aliphatic polyurethane dispersion 0.5-1 parts

0.8-1 part of surface treating agent

0.05 to 0.1 part of cross-linking agent

0.01-0.05 part of compatilizer.

2. The regenerated fabric according to claim 1, wherein: the preparation of the modified regenerated polyester fiber comprises the following steps:

step one, preparing a modified PET slice, which comprises the following steps:

a. carrying out surface modification treatment on the nano zinc oxide and the nano silver powder by using a surface treating agent to obtain a modified nano mixture;

b. mixing the modified nano mixture with aliphatic polyurethane dispersion liquid, and mechanically stirring for 10-15min at normal temperature to obtain modified dispersion liquid; adding itaconic anhydride-vinyl acetate copolymer microspheres with accurate metering into the modified dispersion liquid, stirring and mixing for 15-30min to obtain a mixture;

c. melting and blending the PET reclaimed material with accurate measurement, the mixture obtained in the step b, the crosslinking agent with accurate measurement and the compatilizer to obtain a mixed material, extruding, granulating and drying the mixed material to obtain a modified PET slice; controlling the temperature condition of blending extrusion to be 265-290 ℃;

and step two, extrusion spinning.

3. The regenerated fabric according to claim 2, wherein: the second step comprises the following specific steps: taking the modified PET slices prepared in the first step as raw materials, and preparing the modified regenerated polyester fibers through melting, filtering and spinning, wherein the spinning technological parameters are as follows: the frequency of the metering pump is 50-60Hz, the spinning speed is 3100-3500m/min, the spinning temperature is 265-290 ℃, the temperature of the front hot roller is 95-100 ℃, the temperature of the rear hot roller is 140-150 ℃, the drafting multiple is 3.1-3.3, and the drafting temperature is 75-80 ℃.

4. A regenerated fabric according to claim 3, wherein: in the first step (c), the mixing specifically comprises the following steps: and d, firstly, putting the PET reclaimed material into a screw extruder for banburying, adjusting the screw rotation speed to be 400-500r/min after the screw rotation speed to be 500-600r/min and 25-30min, and putting the mixture obtained in the step b, the accurately-metered cross-linking agent and the accurately-metered compatilizer into the mixture for blending for 1.5-2h.

5. The regenerated fabric according to claim 1, wherein: the weight ratio of the nano zinc oxide to the nano silver powder is (1-1.6): (0.5-0.75); the average grain diameter of the nano zinc oxide is 10-20nm; the average grain diameter of the nanometer silver powder is 20-50nm.

6. The regenerated fabric according to claim 5, wherein: the ratio of the total mass of the nano zinc oxide and the nano silver powder to the mass of the itaconic anhydride-vinyl acetate copolymer microsphere is (1.2-1.5): 1.

7. the regenerated fabric according to claim 6, wherein: the surface treating agent is one of gamma-glycidol ether oxypropyl trimethoxy siloxane KH-560, isopropyl distearoyl oxy aluminate HY-988 and hexadecyl trimethoxy silane KH-1631.

8. The regenerated fabric according to claim 1, wherein: the cross-linking agent is one of N-aminoethyl-3-aminopropyl methyl dimethoxy silane, tetrabutyl titanate and polybutyl titanate; the compatilizer is one or more of macromolecular aminosilane mixture KH-450, silicon-aluminum polymer KY-933 and gamma-aminopropyl methyl diethoxy silane KH-902.

9. The regenerated fabric according to claim 1, wherein: the blending ratio of the modified regenerated polyester fiber to the sorona vegetable fiber to the soybean protein fiber is (40% -65%): (20% -40%): (15% -20%).

10. The process for preparing the regenerated fabric as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:

s1, blending: blending the modified regenerated polyester fiber with the sorona plant fiber and the soybean protein fiber according to a proportion to obtain warp yarn and weft yarn, and weaving the warp yarn and the weft yarn to obtain a fabric blank;

s2, pretreatment: desizing the fabric blank;

s3, dyeing: padding dye liquor on the pretreated fabric, and performing the procedures of pre-drying, water washing and re-drying to obtain dyed fabric;

s4, post-processing: and (3) finishing the dyed fabric obtained in the step (S3) by adopting a finishing agent to finally obtain a regenerated fabric finished product.