CN102433747A - Method for reducing pilling performance of acrylic fabric by using active acrylate polymer - Google Patents

Abstract

The present invention discloses a method for reducing the pilling performance of alkali-modified acrylic fabric by using an active acrylic ester polymer. The specific steps of the method are: firstly, the acrylic fabric is subjected to an alkali modification treatment; and then the acrylic fabric is finished with an active acrylic ester finishing liquid. The anti-pilling finishing method of the present invention can effectively improve the durability of the anti-pilling performance of acrylic, and the fabric can better maintain the anti-pilling performance after wearing and washing, thereby improving the wearing performance of the acrylic fabric.

Description

Method for reducing the pilling performance of acrylic fabric with reactive acrylate polymer

technical field

The invention relates to a method for reducing the pilling performance of an acrylic fabric, in particular to a method for reducing the pilling performance of an alkali-modified acrylic fabric by using an active acrylate polymer.

Background technique

Acrylic fiber is one of the main raw materials in the textile industry. It has characteristics similar to wool, has a fluffy texture, and has good thermal performance. It is a good raw material in the clothing industry. However, due to the fabrics made of acrylic fibers, especially knitted fabrics, the fabric has poor pilling resistance during wearing, and the pilled balls are always attached to the surface of the fabric and are not easy to fall off, which greatly affects the quality of acrylic fabrics. Therefore, it is of great significance to study the pilling resistance of acrylic fiber to improve the wearability of this type of fabric and expand its application range.

In order to improve the pilling property of acrylic fibers, people have carried out a lot of exploration and research, mainly including: 1) Adopting polymerization modification method, mainly by increasing the content of acrylonitrile in the polymer or reducing the relative molecular weight of the polymer, and appropriately increasing the acrylonitrile content. Wide relative molecular mass distribution reduces the extensibility of acrylic fiber. 2) In the spinning stage, by modifying the spinneret and adjusting the spinning process, the surface of the spun fiber has a pitted and concave-convex effect, or a twisted spiral effect, or other methods that can reduce the pilling of acrylic fiber. 3) Treat acrylic fiber or fabric with polyacrylonitrile solvent. 4) Treat the fiber or fabric with a finishing agent. Among them, the treatment of acrylic fibers or fabrics with acrylate copolymer emulsions has a significant effect on improving the pilling properties of fabrics. This is because the particles of the acrylate copolymer emulsion have a certain size distribution. After the treated fabric is dried, the acrylate copolymer binds the fibers in the form of point particles. The resistance is reduced, so it can improve the pilling resistance of the fabric. But the problem is that acrylate copolymers and fibers are physically bonded together, so although acrylic fabrics are finished with acrylate copolymers, the initial anti-pilling effect is better, but the durability of this property is poor , unable to meet the actual consumption needs.

In the literature published by Jia Meng et al. in "The Influence of Hydrolysis Conditions on the Water Absorption Properties of Acrylic Fibers", it is mentioned that acrylic fibers will be hydrolyzed on the surface of the fibers in a strong alkali solution, which can effectively change the surface properties of the fibers, and this method is simple and effective. This is because the acrylic fiber molecular chain contains a large number of -CN side group polar groups, which are hydrolyzed into -COOH and _-CONH groups under the action of strong alkali; in addition, the etching action of alkaline substances on the fiber surface forms a large number of micro Pore structure, which facilitates better "retention" of reactive finishes, such as reactive acrylate polymers, on the fibers after finishing, thereby increasing the durability of the fabric's anti-pilling properties.

Contents of the invention

The purpose of the present invention is to provide a method for reducing the pilling properties of alkali-modified acrylic fabrics with active acrylate polymers, which can improve the durability of the anti-pilling properties of acrylic fabrics to meet actual wearing needs.

A finishing method for reducing the fuzzing and pilling of alkali-modified acrylic fabrics by using an active acrylate polymer, which is characterized in that the specific steps of the method are as follows: first, the acrylic fabric is subjected to alkali modification treatment; and then the active acrylate finishing solution is used Finishing of acrylic fabrics.

The specific steps of the above-mentioned alkali modification treatment are as follows: immerse the acrylic fiber fabric in the strong alkali treatment solution, and wash it at 50-90° C. after being kept warm for 10-30 minutes; the weight of the acrylic fiber fabric and the strong alkali treatment solution The ratio is 1:15-40. In the strong alkali treatment liquid, the quality of strong alkali is 10-20% of the weight of the acrylic fabric.

The above-mentioned strong base is at least one of sodium oxide and potassium oxide.

The specific steps for finishing the acrylic fabric with the above-mentioned active acrylate finishing solution are: immerse the above-mentioned alkali-modified acrylic fabric in the active acrylic finishing solution, the ratio of the acrylic fabric and the finishing solution by bath ratio The ratio is 1:15-30, and the weight of the active acrylate emulsion in the finishing solution is 1-5% of the weight of the acrylic fabric; after running at 60-90°C for 15-30 minutes, it is taken out of the cylinder, dehydrated, dried and baked.

During the drying process of the above-mentioned acrylic fabric, the drying temperature is 80-100°C.

The above-mentioned acrylic fabric is baked at a temperature of 120-150° C., and the treatment time is 2-5 minutes.

The solid content of the active acrylate emulsion is 15-50%, and the molecular weight of the resin is 5,000-100,000.

The macromolecular chain of the above-mentioned active acrylate polymer contains at least one of the following chain segments:

； (a)

;

； (b)

;

In the formula, R ₁ , R ₃ , R ₄ , R ₅ and R ₇ are H or CH ₃ , and R ₂ and R ₆ are alkyl groups with 1 to 18 carbon atoms.

The preparation method of above-mentioned active acrylate emulsion is:

a. The mixed emulsifier composed of acrylate monomer, chain transfer agent dodecyl mercaptan, anionic emulsifier and nonionic emulsifier and water are mixed according to the ratio of 100:0.1～2:3～15:100～300 The mass ratio is mixed evenly, and a stable pre-emulsion is obtained after emulsification by a high-pressure homogenizer; the anionic emulsifier is sodium lauryl sulfate or sodium dodecylsulfonate; the nonionic emulsifier is Fatty alcohol polyoxyethylene ether or nonylphenol polyoxyethylene ether; the acrylate monomer is a mixture of active acrylate monomers and inactive acrylate monomers in a mass ratio of 20 to 50:100;

b. dissolving 0.1 to 2% ammonium persulfate of the mass of the acrylate monomer in deionized water to obtain an initiator solution;

c. In an inert atmosphere, stir and heat 1/5 of the pre-emulsion to 65-85°C, add 1/5 of the initiator solution, react for 0.5-1 hour, then add the remaining pre-emulsion and the remaining initiator dropwise , continue to react for 5-8 hours, and obtain active acrylate emulsion after cooling down.

The above-mentioned fatty alcohol polyoxyethylene ether and nonylphenol polyoxyethylene ether can adopt commercially available products, such as the product of Tianjin Yutong Chemical Auxiliary Co., Ltd. whose brand is fatty alcohol polyoxyethylene ether OS-15, Jiangsu Haian Petrochemical Plant The grade is nonylphenol polyoxyethylene ether OP-10.

The above-mentioned reactive acrylate monomer is at least one of hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, glyceryl acrylate and glyceryl methacrylate; Reactive acrylate monomers are butyl acrylate, isooctyl acrylate, butyl methacrylate, methyl methacrylate, isobutyl acrylate, isooctyl methacrylate, ethyl acrylate, lauryl acrylate, methyl At least one of stearyl acrylate and stearyl acrylate.

The present invention is based on the problem that the finishing agent and the fiber cannot produce a strong chemical interaction during the anti-pilling finishing of the acrylic fiber, thereby affecting the durability of the anti-pilling property of the fabric. In the invention, the acrylic fiber is treated with a strong alkali solution to obtain the alkali-modified acrylic fiber containing a large amount of carboxyl groups on the surface, so that the fiber can have strong chemical interaction with the active acrylate containing hydroxyl/epoxy groups. The anti-pilling finishing method of the present invention can effectively improve the durability of the anti-pilling performance of the acrylic fiber, and the fabric can better maintain the anti-pilling property after wearing and washing, thereby improving the wearing performance of the acrylic fiber fabric .

Description of drawings

Fig. 1 is the test result of the acrylic fiber fabric after the embodiment of the present invention one arrangement ;

Fig. 2 is the test result of the acrylic fiber fabric after the embodiment of the present invention two finishing;

Fig. 3 is the test result of the acrylic fiber fabric after finishing in Example 3 of the present invention .

Detailed ways

The following examples will help to understand the present invention, but do not limit the content of the present invention.

Example 1:

1. Preparation of active acrylate emulsion:

18.40g of hydroxyethyl methacrylate, 7.60g of methyl methacrylate, 36.00g of butyl acrylate, 1.50g of stearic acid alcohol ester, 0.11g of chain transfer agent dodecyl mercaptan, lauryl sulfate Sodium 1.58g, fatty alcohol polyoxyethylene ether OS-15 1.60g, deionized water 126.05ml in the reaction vessel, obtain a stable pre-emulsion after emulsification by a high-pressure homogenizer; take 0.5g ammonium persulfate and dissolve it in 30ml to In deionized water, the initiator solution was obtained.

Add 1/5 of the pre-emulsion into a reactor equipped with a stirrer, a thermometer, and a condenser. After passing through nitrogen to deoxygenate, stir and heat, raise the temperature to 70°C, add 1/5 of the initiator, and react for half an hour before separately Add the remaining pre-emulsion and the remaining initiator dropwise. After 3 hours of dropping, continue to react for 6 hours. After cooling down, an active acrylate emulsion with a solid content of 30% and a molecular weight of 15,000 is obtained.

2. Put the acrylic fiber in the strong alkali treatment bath, add the aqueous solution of sodium oxide according to the weight ratio of the bath ratio of 1:30, the quality of sodium oxide is 20% of the weight of the acrylic fiber, raise the temperature to 80°C, and keep it warm for 15 minutes Turn on the water and wash 2 times with pure water.

3. Put the alkali-modified acrylic fiber in the finishing bath, add the active acrylate emulsion and water according to the weight ratio of 1:20, the weight of the active acrylate emulsion is 3% of the weight of the acrylic fiber, after running at 65°C for 20 minutes, Take out the cylinder, dehydrate, dry the fabric at 90°C, and bake at 140°C for 4 minutes. 

The finished acrylic fabric is detected by the method specified in the GB/T4802.3-2008 document, and the non-alkali-modified fabric is compared with the finishing method in this embodiment; as a comparison of the anti-pilling durability , refer to the method specified in GB/T 8424.1-3-2001 to prepare alkaline washing liquid, put another group of samples into it, wash it in the washing machine for 10 minutes, take it out, and test it after drying. The results are shown in Figure 1.

Example 2:

Finishing agent: the active acrylate emulsion obtained in Example 1. the

Put the acrylic fiber in a strong alkali treatment bath, add water according to the weight ratio of 1:20, add sodium oxide with 15% of the weight of the acrylic fiber, raise the temperature to 80°C, keep it warm for 20 minutes, drain the water, and wash it twice with pure water.

Put the alkali-modified acrylic fiber in the finishing bath, add water according to the weight ratio of 1:20, add the active acrylate emulsion of 4% of the weight of the acrylic fiber, run it at 70°C for 20 minutes, take it out of the cylinder, dehydrate it, and put it under 90°C Dry the fabric at 140°C for 4 min.

The finished acrylic fabric is detected by the method specified in the GB/T4802.3-2008 document, and the non-alkali-modified fabric is compared with the finishing method in this embodiment; as a comparison of the anti-pilling durability , refer to the method specified in GB/T 8424.1-3-2001 to prepare alkaline washing liquid, put another group of samples into it, wash it in the washing machine for 10 minutes, take it out, and test it after drying. See Figure 2 for the results.

Example 3:

Finishing agent: the active acrylate emulsion obtained in Example 1.

Put acrylic fibers in a strong alkali treatment bath, add water according to the weight ratio of 1:20, add sodium oxide with 15% of the weight of acrylic fibers, raise the temperature to 90°C, keep warm for 20 minutes, drain water, and wash twice with pure water.

Put the alkali-modified acrylic fiber in the finishing bath, add water according to the weight ratio of 1:20, add the active acrylate emulsion of 5% of the weight of the acrylic fiber, run it at 60°C for 30 minutes, take it out of the cylinder, dehydrate it, and set it at 90°C Dry the fabric at 140°C for 4 min.

The finished acrylic fabric is detected by the method specified in the GB/T4802.3-2008 document, and the non-alkali-modified fabric is compared with the finishing method in this embodiment; as a comparison of the anti-pilling durability , refer to the method specified in GB/T 8424.1-3-2001 to prepare alkaline washing liquid, put another group of samples into it, wash it in the washing machine for 10 minutes, take it out, and test it after drying. See Figure 3 for the results.

Claims (10)

1. the method for sorting with active crylic acid ester polymer reduction alkali modification acrylic fabric pilling is characterized in that the concrete steps of this method are: at first acrylic fabric is carried out the alkaline process modification and handle; And then acrylic fabric is put in order with active acrylate's dressing liquid.

2. the method for sorting that reduces alkali modification acrylic fabric pilling with the active crylic acid ester polymer according to claim 1; It is characterized in that the concrete steps that described alkaline process modification is handled are: acrylic fabric is immersed in the highly basic treatment fluid; Be warmed up to 50～90 ℃; After handling 10～30min, clean; The weight ratio of described acrylic fabric and highly basic treatment fluid is 1:15～40, and in the highly basic treatment fluid, the quality of highly basic is 10～20% of an acrylic fabric weight.

3. the method for sorting with active crylic acid ester polymer reduction alkali modification acrylic fabric pilling according to claim 2 is characterized in that described highly basic is at least a kind in oxygen sodium oxide molybdena and the oxygen potassium oxide.

4. the method for sorting that reduces alkali modification acrylic fabric pilling with the active crylic acid ester polymer according to claim 1; It is characterized in that the concrete steps that described use active acrylate dressing liquid is put in order acrylic fabric are: the above-mentioned acrylic fabric through the alkaline process modification is immersed in places active acrylate's dressing liquid; Acrylic fabric and dressing liquid are by weight being 1:15～30, and the weight of active acrylate's emulsion is 1～5% of acrylic fabric weight in the dressing liquid; Behind 60～90 ℃ of running 15～30 min, go out cylinder, dehydration, oven dry bakes.

5. the method for sorting with active crylic acid ester polymer reduction alkali modification acrylic fabric pilling according to claim 4 is characterized in that described acrylic fabric in drying course, and bake out temperature is 80～100 ℃.

6. the method for sorting with active crylic acid ester polymer reduction alkali modification acrylic fabric pilling according to claim 4 is characterized in that described acrylic fabric is 120～150 ℃ in the temperature of the process of baking, and the processing time is 2～5 min.

7. according to claim 1 or 4 described method for sorting with active crylic acid ester polymer reduction alkali modification acrylic fabric pilling, the solid content that it is characterized in that said active acrylate's emulsion is 15～50%, and the molecular resin amount is 5000～100000.

8. according to claim 7ly reduce the method for sorting of alkali modification acrylic fabric pilling, it is characterized in that containing in the macromolecular chain of described active crylic acid ester polymer at least a in the following chain link with the active crylic acid ester polymer:

（a）

；

（b）

；

In the formula, R ₁, R ₃, R ₄, R ₅And R ₇Be H or CH ₃, R ₂And R ₆It is the alkyl of 1～18 carbon atom.

9. the method for sorting with active crylic acid ester polymer reduction alkali modification acrylic fabric pilling according to claim 8 is characterized in that the preparation method of described active acrylate's emulsion is:

A. blended emulsifier of acrylate monomer, chain-transferring agent lauryl mercaptan, anionic emulsifier and nonionic emulsifier being formed and water mix by the mass ratio of 100:0.1～2:3～15:100～300, after high pressure homogenizer emulsification, obtain stable pre-emulsion; Described anionic emulsifier is lauryl sodium sulfate or ten sodium hisbenzene sulfonates; Described nonionic emulsifier is AEO or NPE; Described acrylate monomer is active acrylate's monomer and the nonactive acrylate monomer mixture with the mass ratio of 20～50:100;

B. the ammonium persulfate with 0.1～2 % of acrylate monomer quality is dissolved in the deionized water, obtains initiator solution;

C. in inert atmosphere; 1/5 pre-emulsion is stirred and heated to 65～85 ℃, adds 1/5 initiator solution, react and drip remaining pre-emulsion and remaining initator after 0.5～1 hour more respectively; Continue reaction 5～8 hours, obtain active acrylate's emulsion after the cooling.

10. according to claim 9ly reduce the method for sorting of alkali modification acrylic fabric pilling, it is characterized in that described active acrylate's monomer is at least a in methacrylic acid hydroxyl ethyl ester, methacrylic acid hydroxyl propyl ester, Hydroxyethyl Acrylate, acrylic acid hydroxy propyl ester, acrylic acid glyceride and the glyceral methacrylate with the active crylic acid ester polymer; Described nonactive acrylate monomer is at least a in butyl acrylate, Isooctyl acrylate monomer, butyl methacrylate, methyl methacrylate, isobutyl acrylate, EHMA, ethyl acrylate, acrylic acid bay alcohol ester, methacrylic acid stearic acid alcohol ester, the stearyl acrylate acid alcohol ester.

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