CN1142331C

CN1142331C - Soybean milk composite fibre and its production method

Info

Publication number: CN1142331C
Application number: CNB011388978A
Authority: CN
Inventors: 陈福库; 范伟杰; 孙帮庆; 祖志东
Original assignee: 陈福库
Priority date: 2001-12-22
Filing date: 2001-12-22
Publication date: 2004-03-17
Anticipated expiration: 2021-12-22
Also published as: CN1354291A

Abstract

The present invention relates to a composite soybean-milk fiber which is prepared from the components with weight percentages: 20% to 50% of soybean protein and milk protein (the matching proportion of the soybean protein to the milk protein is that the soybean protein accounts for 30% to 70% and the milk protein accounts for 30% to 70% by weight percentages), and 50% to 80% of polyvinyl alcohol. The making method comprises: (1) soybean protein and milk protein are proportionally mixed, and are dissolved in a NaOH solution of which the pH is from 9 to 13.5, and the soybean-milk protein content is from 10% to 20%; (2) polyvinyl alcohol washed with water is dissolved and prepared into 10% to 20% water solution; (3) the soybean-milk protein solution and the polyvinyl alcohol solution are mixed in the proportion of 20% to 50% of soybean-milk protein and 50% to 80% polyvinyl alcohol; an initiator of an oxidation-reduction system is added to the solution to initiate graft copolymerization, and a spinning solution is prepared; (4) wet spinning is carried out with vinylon production equipment and technology. The soybean protein has wide source and low price; the milk protein causes fibers to have smooth and soft tactile impression; the fiber can be produced by the existing equipment in domestic vinylon factories; the present invention has the advantages of simple method, low investment and obvious effects.

Description

Soybean milk composite fibre and manufacture method thereof

The present invention relates to a kind of method of making soybean milk composite fibre with soybean protein, milk protein and polyvinyl alcohol.

Along with people's living standard improves constantly, the requirement of garment material is developed towards multi-level, many kinds direction.In the world current, occurred that Piao returns very to returning aspect dress, the pursuit of uphold nature, comfortable healthy aspect, market is bigger to the demand of natural fabric.For adapting to this piece market new demand, will force us to develop the fabric raw material of high-performance, high-quality, high technology content.

Utilize the native protein azlon, proposed several different methods at present.Spinning the milk protein silk of being called of company exploitation " Star ノ Application " (glad you) fiber as Japanese Japan, is the composite fibre by the acrylonitrile compolymer of about 40% milk casein and 60%.China's publication and for example provides respectively in the application number 95111366.6,96116532.4,94114071.7 with pupa albumen, milk protein and fibroin and the blend of synthetic high polymer raw material propylene nitrile, acrylamide or polyacrylonitrile, the manufacture method of copolymerized fiber.It is the method for raw material production soybean protein composite fibre that China also has with the glycinin.Also have my patent applied for (application number: 01106274.6, open) milk protein and polyvinyl alcohol composite fiber manufacture method in addition.

For further making protein fibre product diversification, seriation, meet the need of market better, the invention provides a kind of is raw material with soybean protein, milk protein and polyvinyl alcohol, produces the method for soybean milk composite fibre.

The method of the manufacturing soybean milk composite fibre that the present invention relates to comprises: the dissolving of (1) soybean protein and milk protein, modification; (2) washing of polyvinyl alcohol and dissolving; (3) protein solution and poly-vinyl alcohol solution redox system initator, the initiation grafting copolymerization; (4) wet spinning is made soybean milk composite fibre.

At first, get soybean protein and milk protein, press soybean protein isolate 30～70%, the mixed of milk protein 30～70% adds deionized water, is 10～20% with the mass percentage content of dilute NaOH solution furnishing protein, PH is 9～13.5 protein solution, and to add the liquor capacity percentage composition be that 0.5～1% concentration is 36% hydrogen peroxide, is heated to 80～120 ℃, stirs to dissolve fully to protein in 2～4 hours.

Polyvinyl alcohol is washed, is dissolved according to the known vinylon production technology in synthetic fiber field, is mixed with the polyvinyl alcohol water solution of 10-20%.

With the protein and the polyvinyl alcohol of dissolving, the weight ratio of pressing dry is (20～50): (50～80), send into after filtration respectively in another reactor, mixed 30～60 minutes.Add oxidation-reducting system initiator then, and to transfer pH value with dilute sulfuric acid be 2～3, insulation was stirred polymerisation 1～2 hour at 60～90 ℃, made protein and polyvinyl alcohol graft copolymerized copolymerization.Wherein: oxidation-reducting system initiator can be selected for use: NaClO ₃-Na ₂SO ₃, NaClO ₃-NaHSO ₃, K ₂S ₂O ₈-NaHSO ₃, (NH ₄) ₂S ₂O ₈-NaHSO ₃Make initator, CuSO ₄Make accelerator; Its consumption (to protein) is: oxidant 0.5～1%, reductant 1.5～5%, accelerator 0.0005～0.0015%.

With graft copolymerization solution, be heated to 98 ± 2 ℃, send into deaerator after filtration, static and keep 98 ± 2 ℃ of temperature, deaeration 6-10 hour, make the spinning solution of spinnability.

Filtration in the said process when small scale experiments, can be used candle filter or dish-shaped filter; Use plate and frame type filter-press during industrial production.Its filtering material uses three layers of polyvinyl single-side pile and one deck Kanakin.

Spinning solution after the deaeration utilizes the spinning process of the known vinylon in synthetic fiber field and equipment to carry out spinning, drawing-off, dryness finalization, acetalation arrangement, makes soybean milk composite fibre.

Characteristics of the present invention are: cheap, the wide material sources of soybean protein raw material, milk protein make the fiber feel smooth, soft; The composite fibre that generates has good hygroscopicity, gas permeability and dyeability, and comfortable and easy to wear smooth, skin-friendly is good; Can make full use of the production equipment of domestic vinylon plant, suitably increase protein dissolution equipment, can produce after the transformation, small investment, instant effect.

Present invention will be further described for following example, but can not think to limit scope of invention.In these examples, deal and percentage are by weight, unless other explanation is arranged.

Example

Take by weighing soybean protein and milk protein and (press soybean protein isolate 50% for each 1.2 kilograms, the ratio of milk protein 50%) mixes, add 12.5 kilograms of deionized waters, mass percentage content with dilute NaOH solution furnishing protein is 15～16%, pH value is 15 kilograms of 12 mixed liquors, and to add concentration be 36% hydrogen peroxide 100ml, is heated to 90～95 ℃, stirs to dissolve fully to protein in 2～4 hours.

15～16% polyvinyl alcohol water solution is washed, dissolves, is mixed with to polyvinyl alcohol according to the known vinylon production technology in synthetic fiber field.

With the protein solution and the poly-vinyl alcohol solution of dissolving, be 30: 70 by weight, send into after filtration in another reactor respectively, mixed 30 minutes.Add oxidation-reducting system initiator K then ₂S ₂O ₈20 grams, NaHSO ₃60 grams, accelerator CuSO ₄2.5 gram, and to transfer pH value with dilute sulfuric acid be 2 ± 0.2, insulation was stirred polymerisation 1 hour at 80 ℃, made protein and polyvinyl alcohol graft copolymerized copolymerization.

With graft copolymerization solution, be heated to 98 ± 2 ℃, send into deaerator after filtration, static and keep 98 ± 2 ℃ of temperature, the spinning solution of spinnability is made in deaeration 8 hours.

Claims

1, soybean milk composite fibre is characterized in that it is formed by soybean protein, milk protein and the graft copolymerization of polyvinyl alcohol raw material, and above by weight percentage three kinds of raw materials account for following ratio: soybean protein and milk protein 20-50, polyvinyl alcohol 50-80.

2, according to claim 1, the cooperation ratio of soybean protein and milk protein is: by weight percentage, soybean protein accounts for 30-70, and milk protein accounts for 30-70.

3, the manufacture method of soybean milk composite fibre is characterized in that glycinin and milk casein through dissolving, modification processing, make protein molecular weight be degraded to 20,000 to 30,000, and strand launches to be the linear macromolecule structure; Soybean protein, milk protein and polyvinyl alcohol graft copolymerized copolymerization; Make soymilk bicomponent filament yarn or staple fibre with wet spinning.

4, method according to claim 3 is characterized in that: dissolving soybean protein and milk protein, can use dilute NaOH solution, and pH value is 9-13.5.

5, method according to claim 3 is characterized in that: working concentration is 36% hydrogen peroxide oxidation soybean protein and the disulfide bond in the milk protein molecule, makes the protein degradation modification, and consumption is the 0.5-1% of soymilk protein solution volume.

6, method according to claim 3, soybean protein, milk protein and polyvinyl alcohol graft copolymerized copolymerization is characterized in that: oxidation-reduction initiator can use K ₂S ₂O ₈-NaHSO ₃, K ₂S ₂O ₈Consumption is the 0.5-1% of beans, milk proem dry weight, NaHSO ₃Consumption is the 1.5-5% of beans, milk proem dry weight, and accelerator can use CuSO ₄, consumption is the 0.0005-0.0015% of beans, milk proem dry weight.