CN112663161A - Native anti-wrinkle viscose spinning solution, fiber and preparation method - Google Patents
Native anti-wrinkle viscose spinning solution, fiber and preparation method Download PDFInfo
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- CN112663161A CN112663161A CN202011490255.2A CN202011490255A CN112663161A CN 112663161 A CN112663161 A CN 112663161A CN 202011490255 A CN202011490255 A CN 202011490255A CN 112663161 A CN112663161 A CN 112663161A
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Abstract
The invention relates to a primary crease-resistant viscose spinning solution, a fiber and a preparation method thereof, wherein the primary crease-resistant viscose spinning solution comprises the following components in percentage by mass: 4 to 6 percent of sodium hydroxide, 6 to 9 percent of alpha cellulose, 0.5 to 1 percent of anti-wrinkle agent, 0 to 0.1 percent of catalyst, and the balance of water and a small amount of impurities. The invention relates to a primary crease-resistant viscose fiber, which is formed by physically blending and spinning a viscose spinning solution containing alpha cellulose and a crease-resistant agent, and belongs to the field of manufacturing of regenerated cellulose fibers by textile technology. The primary crease-resistant viscose fiber has the characteristics of softness, comfort, sweat absorption and the like of the viscose fiber, also has better mechanical property and good crease resistance, is different from an after-finishing crease-resistant fabric, and the crease-resistant agent and the cellulose fiber in the primary crease-resistant viscose fiber achieve molecular level fusion, thereby overcoming the defect that the viscose fiber is easy to crease, and solving the defects that the after-finishing crease-resistant fabric is poor in washability and easy to yellow and damage in strength.
Description
Technical Field
The invention relates to a primary crease-resistant viscose spinning solution, a primary crease-resistant viscose spinning fiber and a preparation method thereof, belonging to the field of viscose fiber manufacturing in the textile industry.
Background
Viscose has been widely used from garments to nonwoven products for over one hundred years. In the application process, people find that soft and comfortable viscose fiber clothes are easy to deform and have poor dimensional stability, and clothes made of viscose fibers are easy to wrinkle, so that the appearance and the appearance of textiles are poor, and the wearing life is short. Viscose fiber fabrics available in the market at present mostly appear in a form of blending with cotton or other synthetic fibers, so as to improve the defects.
To date, no viscose staple fiber product has been produced or reported publicly that provides virgin anti-wrinkle properties. The anti-wrinkle technology in the market is realized by performing after-finishing on the fabric. The durability of the after-finishing crease-resistant technology is poor, and the crease-resistant performance is reduced along with the increase of the washing times. In addition, the after-finishing crease-resistant technology can cause the strength loss of the fabric, the hand feeling is hard, and the fabric is yellow in the drying link, so that the application of the fabric is limited.
Disclosure of Invention
Aiming at the current industrial situation, the invention aims to provide a primary anti-wrinkle viscose spinning solution and viscose fibers with a permanent anti-wrinkle effect, aiming at overcoming the defects that the existing viscose fiber fabric is easy to deform and wrinkle, prolonging the service life of clothes, reducing the consumption cost of clothes and meeting the current trend of energy conservation, emission reduction and low carbon life.
The technical scheme for solving the technical problems is as follows: a primary anti-wrinkle viscose spinning solution comprises the following components in percentage by mass: 4 to 6 percent of sodium hydroxide, 6 to 9 percent of alpha cellulose, 0.5 to 1 percent of anti-wrinkle agent, 0 to 0.1 percent of catalyst, and the balance of water and a small amount of impurities.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the alpha cellulose is derived from one or a mixture of more of wood pulp cellulose, bamboo pulp cellulose and cotton pulp cellulose. Specifically, the alpha cellulose source may be a purified product of plant cellulose such as bagasse, cotton, etc., or a purified product of cellulose such as wood, bamboo, etc.
Further, the anti-wrinkle agent is one or a mixture of more of glutaraldehyde, citric acid, 1,2,3, 4-butanetetracarboxylic acid, polyether block aminosiloxane polymer, imidazolidinone derivative, melamine resin, urea resin and dimethylol dihydroxy ethylene urea.
The anti-wrinkle agent can be organic matters containing aldehyde groups, such as glutaraldehyde, can also be polycarboxylic acids, such as citric acid and 1,2,3, 4-butanetetracarboxylic acid, and can also be other agents with an anti-wrinkle function and can react with cellulose hydroxyl groups. For example, the polyether block amino siloxane polymer is a common fabric hand feeling improver, mature commodities such as Zhejiang Hongda special silicone oil 50, Magnasoft SRS and Magnasoft JSS silicone oil in America, and belongs to high molecular substances and has the characteristic similar to a spring structure, and the structure provides longitudinal extension and resilience of fibers in the viscose fibers and shows better elastic recovery compared with common viscose fibers, so that the crease-resistant viscose fibers have higher strength and elasticity, can enable clothes made of the fibers to have a permanent crease-resistant effect, and endow the viscose fibers with new performance. Other compounds work similarly.
Further, the anti-wrinkle agent comprises 1,2,3, 4-butanetetracarboxylic acid and/or citric acid, and the primary anti-wrinkle viscose spinning solution comprises a catalyst with the mass percentage of more than 0% and less than or equal to 0.1%.
The method has the advantages that the catalyst is a chemical reaction initiator, 1,2,3, 4-butanetetracarboxylic acid and citric acid in the anti-wrinkle agent can be used for initiation, the content of the catalyst which needs to be added is more than 0 and less than or equal to 0.1 percent, other anti-wrinkle agents can be omitted, the main action mechanism is to promote the activation of cellulose hydroxyl and the activation of butanetetracarboxylic acid or citric acid carboxyl under the weak alkaline condition, and the chemical reaction is more favorably carried out.
Further, the catalyst is one of triethanolamine, magnesium chloride, manganese dioxide and sodium phosphite.
The invention also relates to a preparation method of the primary anti-wrinkle viscose spinning solution, which comprises the following steps: (1) preparing viscose spinning solution and preparing an anti-wrinkle agent; (2) and adding the prepared anti-wrinkle agent into the viscose spinning solution to obtain the primary anti-wrinkle viscose spinning solution.
Viscose fiber spinning needs viscose spinning solution, common viscose fiber is obtained by spinning the common viscose spinning solution, the viscose spinning solution added with the anti-wrinkle agent is native anti-wrinkle viscose spinning solution, and the native anti-wrinkle viscose fiber can be obtained after spinning.
The viscose spinning solution adopts a conventional viscose fiber manufacturing method, namely, a certain mass of alpha cellulose pulp is accurately weighed, and the alpha cellulose pulp is subjected to a viscose production process: dipping, crushing, ageing, yellowing, filtering and degassing to prepare the viscose spinning solution. Conventional viscose spinning dope mainly contains sodium hydroxide, alpha cellulose, water and small amounts of unavoidable impurities, which are original to or carried over by some steps of the above-mentioned manufacturing method, and the content is usually below 0.25%, which does not affect normal spinning and can be ignored.
Further, the addition amount of the anti-wrinkle agent is 5.5-16.7% of the mass of the alpha cellulose in the viscose spinning solution. According to the addition amount, in the finally obtained primary anti-wrinkle viscose spinning solution, the mass percent of alpha cellulose is 6-9%, and the mass percent of the anti-wrinkle agent is 0.5-1%. If the anti-wrinkle agent comprises multiple components, the multiple components are blended firstly, and the mixture is blended with deionized water, wherein the blending concentration is 15-25%. In addition, for the anti-wrinkling agent requiring the catalyst, the catalyst is added into the preparation liquid according to the corresponding design proportion during preparation (the anti-wrinkling agent comprises 1,2,3, 4-butanetetracarboxylic acid and/or citric acid, and the catalyst is required, otherwise the catalyst is not required). The anti-wrinkle agent solution (if a catalyst is a mixed solution) is specifically added by the following steps: adding the blended solution into a common viscose spinning solution through a metering pump, synchronously adjusting the flow of the solution and the flow of the spinning solution in the adding process to ensure continuous and accurate adding, and mixing the solution through a secondary mixer, wherein the primary mixer is a static mixer, and the secondary mixer is a dynamic mixer to obtain the uniformly mixed primary crease-resistant viscose spinning solution.
The invention also relates to a preparation method of the native anti-wrinkle viscose fiber, which is prepared by spinning the native anti-wrinkle viscose spinning solution. The invention relates to a novel native anti-wrinkle viscose fiber processing method based on a production process of common viscose fibers, in particular to a method for processing native anti-wrinkle viscose fibers, which comprises the steps of uniformly blending a viscose spinning stock solution for producing viscose fibers and an anti-wrinkle agent, then carrying out spinning forming in a spinning bath to obtain blended co-melting formed anti-wrinkle native cellulose filaments, firstly carrying out cutting and refining procedures to obtain wet clean fibers, and then carrying out cross-linking fixation at the temperature of 140 ℃ in the drying process to finish the preparation of the native anti-wrinkle viscose staple fibers.
More specifically, the viscose spinning solution is a yellow-brown viscous liquid which has good fluidity and enters a forming bath through a spinneret plate in 45-55 micron trickle to gradually solidify to form solid fibers. Before spinning, a coagulation forming bath is prepared, wherein the concentration of sulfuric acid is 60-120 g/L, the concentration of sodium sulfate is 80-270 g/L, the concentration of zinc sulfate is 5-15 g/L, and the temperature is 30-50 ℃.
The invention also relates to a protogenic anti-wrinkle viscose fiber prepared by the preparation method, in particular to a natural anti-wrinkle viscose fiber prepared by blending, co-melting, spinning and crosslinking copolymerization of viscose spinning solution containing alpha cellulose and an anti-wrinkle agent.
Further, the paint comprises the following components in percentage by mass: 78.0-85.5% of alpha cellulose, 4.7-13.0% of anti-wrinkle agent and 9.0-9.8% of water.
The invention has the beneficial effects that: the invention relates to a primary crease-resistant viscose fiber, which is formed by physically blending and spinning a viscose spinning solution containing alpha cellulose and a crease-resistant agent, and belongs to the field of manufacturing of regenerated cellulose fibers by textile technology. The primary crease-resistant viscose fiber has the characteristics of softness, comfort, sweat absorption and the like of the viscose fiber, also has better mechanical property and good crease resistance, is different from an after-finishing crease-resistant fabric, and the crease-resistant agent and the cellulose fiber in the primary crease-resistant viscose fiber achieve molecular level fusion, thereby overcoming the defect that the viscose fiber is easy to crease, and solving the defects that the after-finishing crease-resistant fabric is poor in washability and easy to yellow and damage in strength. Can be widely applied to the production of fabrics such as high-grade shirts, western-style trousers, suits, women's clothes, washable and wearable fabrics and the like. Fabrics and other textiles produced by the protogenic anti-wrinkle viscose fiber do not need finishing processes such as anti-wrinkle and non-ironing, and the application field of the traditional viscose fiber is enlarged.
The invention adopts the mode of injecting the stock solution before blending to mix the viscose spinning stock solution and the anti-wrinkling agent, realizes the effective utilization of the anti-wrinkling agent, almost all the anti-wrinkling agent is blended into the fiber to form molecular level mosaic through the acid-encountering molding of the viscose spinning stock solution, and compared with the after-finishing technology, the anti-wrinkling agent is only discharged into a sewage system in a trace manner, thereby reducing the pollution to the environment.
The anti-wrinkle agent embedded in the fiber and the viscose fiber body are subjected to refining processes such as water washing, desulfurization and the like, and due to the rise of temperature in a drying system, groups with a crosslinking effect in the anti-wrinkle agent rapidly react with the viscose fiber, so that the anti-wrinkle agent and the viscose fiber are crosslinked into a stable combination. The cross-linking of the viscose fiber prepared by the method occurs in the drying process, the bonding force of the cross-linking enables the strength of the fiber to be improved, and the wrinkle recovery angle of the fabric to be increased, so that the fiber obtains good elasticity and wrinkle recovery capability.
Specifically, at the temperature of 100-140 ℃, the functional groups of the anti-wrinkling agent, such as reactive functional groups of amino, carboxyl, aldehyde and the like, and cellulose hydroxyl are subjected to copolymerization reaction, and thermosetting resin is subjected to solidification reaction, so that the tensile strength of the viscose fiber is longitudinally increased, and the breaking strength is improved.
The primary crease-resistant viscose fiber matrix prepared by the method and the main production process are consistent with those of the conventional viscose fiber, so that the moisture absorption and permeability characteristics of the conventional viscose fiber are maintained, and the crease-resistant viscose fiber matrix is a textile raw material with good application significance.
Drawings
FIG. 1 is a schematic representation of the structure of a polyether block aminosiloxane polymer.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
Preparing a viscose spinning solution according to a common viscose fiber production process, taking 10 kilograms of viscose spinning solution, adding an anti-wrinkle agent, and ensuring that the components are in proportion as follows:
the anti-wrinkle agent is urea-formaldehyde resin, which is added into the viscose spinning solution according to the mass of 10 percent of the A cellulose, which is equivalent to 0.9 percent of the mass of the system, the urea-formaldehyde resin and the viscose spinning solution are uniformly mixed, and the mixture is conveyed to a spinning section and is molded, drawn, cut, refined and dried at high temperature according to the common viscose spinning process to obtain the primary anti-wrinkle viscose staple fiber.
Example 2
Preparing a viscose spinning solution according to a common viscose fiber production process, taking 10 kilograms of viscose spinning solution, adding an anti-wrinkle agent, and ensuring that the components are in proportion as follows:
the anti-wrinkle agent is dimethylol dihydroxy ethylene urea which is added into the viscose spinning solution according to the mass of 16.7 percent of the alpha cellulose, which is equivalent to 1 percent of the system mass, is uniformly mixed and conveyed to a spinning section, and the raw anti-wrinkle viscose staple fiber is obtained by molding, drafting, cutting, refining and high-temperature drying according to the common viscose spinning process.
Example 3
Preparing a viscose spinning solution according to a common viscose fiber production process, taking 10 kilograms of viscose spinning solution, adding an anti-wrinkling agent and a catalyst, and ensuring that the components are in proportion as follows:
the crease-resistant agent is 1,2,3, 4-butanetetracarboxylic acid, which is added into the spinning solution according to 10% of the mass of the alpha cellulose, which is equivalent to 0.9% of the mass of the system, and the catalyst is sodium phosphite, which is added into the viscose spinning solution according to 0.1% of the mass of the system, and the mixture is uniformly mixed and conveyed to a spinning section, and the mixture is formed, drawn, cut, refined and dried at high temperature according to the common viscose spinning process to obtain the primary crease-resistant viscose staple fiber.
The anti-wrinkle agent can be a multi-component mixture or a single component, the anti-wrinkle agent applied in the embodiment is 1,2,3, 4-butanetetracarboxylic acid, and sodium phosphite (catalyst) is preferably used as an initiator, so that the sodium phosphite is added in the anti-wrinkle agent, and the content of the sodium phosphite is 0-0.1% of the mass content of the original anti-wrinkle viscose spinning dope.
Example 4
Preparing a viscose spinning solution according to a common viscose fiber production process, taking 10 kilograms of viscose spinning solution, adding an anti-wrinkle agent, and ensuring that the components are in proportion as follows:
the anti-wrinkle agent is melamine resin, which is added into the viscose spinning solution according to 5.6 percent of the mass of the alpha cellulose, which is equivalent to 0.5 percent of the mass of the system, and the melamine resin is uniformly mixed and conveyed to a spinning section, and the raw anti-wrinkle viscose staple fiber is obtained by molding, drafting, cutting, refining and high-temperature drying according to the common viscose spinning process.
Example 5
Preparing a viscose spinning solution according to a common viscose fiber production process, taking 10 kilograms of viscose spinning solution, adding an anti-wrinkle agent, and ensuring that the components are in proportion as follows:
the anti-wrinkle agent is polyether long-chain silicone oil, is added into the viscose spinning solution according to the mass of 7.5 percent of the A cellulose, is equivalent to 0.6 percent of the system mass, is uniformly mixed, is conveyed to a spinning section, is molded, stretched, cut, refined and dried at high temperature according to the common viscose spinning process, and then the primary anti-wrinkle viscose staple fiber is obtained.
In the above examples, the anti-wrinkling agent can be replaced by a polyether block aminosilicone polymer, the structure of which is shown in fig. 1, and which has spring-like structural characteristics, and which provides longitudinal elongation and rebound of the fibers within the viscose fibers, which is shown by better elastic recovery than conventional viscose fibers. In addition, the anti-wrinkling agent may be replaced by a mixture of one or more of glutaraldehyde, citric acid, 1,2,3, 4-butanetetracarboxylic acid, polyether block aminosiloxane polymer, imidazolidinone derivative, melamine resin, urea resin, dimethylol dihydroxy ethylene urea, and fibers prepared with properties similar to those of the examples above.
The linear density and breaking strength of the fibers obtained in examples 1,2,3,4 and 5 and the plain weave fabric made of the fibers obtained in examples 1,2,3,4 and 5 and the ordinary viscose fibers are shown in table 1. The linear density of the fiber is tested according to a GB/T14335-2008 chemical fiber short fiber linear density test method, the breaking strength and the breaking elongation of the fiber are tested according to a GB/T14337-2008 chemical fiber short fiber tensile property test method, and the wrinkle recovery angle of the fabric is tested according to a GB/T3819-1997 textile fabric crease recovery determination recovery angle method, and the obtained results are shown in Table 1.
TABLE 1 fiber and Fabric Performance Table
As can be seen from Table 1, the primary anti-wrinkle viscose fiber produced by the invention has greatly improved dry and wet breaking strength, and the wrinkle recovery angle of the fabric is obviously larger than that of the common viscose fiber fabric, so that the defect of poor anti-wrinkle property of the conventional viscose fiber can be effectively overcome.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The primary anti-wrinkle viscose spinning solution is characterized by comprising the following components in percentage by mass: 4 to 6 percent of sodium hydroxide, 6 to 9 percent of alpha cellulose, 0.5 to 1 percent of anti-wrinkle agent, 0 to 0.1 percent of catalyst, and the balance of water and a small amount of impurities.
2. The primary anti-wrinkle viscose spinning solution according to claim 1, wherein the alpha cellulose is derived from one or more of wood pulp cellulose, bamboo pulp cellulose and cotton pulp cellulose.
3. The virgin anti-wrinkle viscose spinning dope according to claim 1 or 2, wherein the anti-wrinkle agent is one or a mixture of more of glutaraldehyde, citric acid, 1,2,3, 4-butanetetracarboxylic acid, polyether block aminosiloxane polymer, imidazolidinone derivative, melamine resin, urea resin, dimethylol dihydroxy ethylene urea.
4. The native anti-wrinkle viscose spinning dope according to claim 3, wherein the anti-wrinkle agent comprises 1,2,3, 4-butanetetracarboxylic acid and/or citric acid, and the native anti-wrinkle viscose spinning dope comprises a catalyst in a mass percentage of more than 0% and less than or equal to 0.1%.
5. The primary anti-wrinkle viscose spinning dope according to claim 4, wherein the catalyst is one of triethanolamine, magnesium chloride, manganese dioxide and sodium phosphite.
6. A method for preparing the native anti-wrinkle viscose spinning dope according to any one of claims 1 to 5, comprising the steps of: (1) preparing viscose spinning solution and preparing an anti-wrinkle agent; (2) and adding the prepared anti-wrinkle agent into the viscose spinning solution to obtain the primary anti-wrinkle viscose spinning solution.
7. The method for preparing the primary anti-wrinkle viscose spinning dope according to claim 6, wherein the anti-wrinkle agent is added in an amount of 5.5-16.7% of the mass of the alpha cellulose in the viscose spinning dope.
8. A method for preparing a native anti-wrinkle viscose fiber, characterized in that the native anti-wrinkle viscose fiber is obtained by spinning the native anti-wrinkle viscose spinning dope according to any one of claims 1 to 5.
9. A virgin anti-wrinkle viscose fiber, characterized by being produced by the production method of claim 8.
10. The native anti-wrinkle viscose fiber according to claim 9, comprising the following components in percentage by mass: 78.0-85.5% of alpha cellulose, 4.7-13.0% of anti-wrinkle agent and 9.0-9.8% of water.
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Application publication date: 20210416 |