阅读说明：本技术 一种聚酯纤维毯接枝壳聚糖工艺整理方法 (Technological finishing method for grafting chitosan on polyester fiber blanket ) 是由 程贤生 于 2021-07-12 设计创作，主要内容包括：本发明公开了一种聚酯纤维毯接枝壳聚糖工艺整理方法,将聚酯纤维切片放入到质量分数为15％-20％的氢氧化钠溶液中进行碱洗,同时在氢氧化钠溶液中加入5g碱减量助剂,混合搅拌30min,通过去离子水设备去除溶液中的钠离子；取5g醋酸溶液,将壳聚糖粉末放入醋酸溶液,使其溶解于醋酸溶液中；将S1中的聚酯纤维切片水溶液和S2中的壳聚糖溶液依次加入200ml的水中。本发明由季铵盐组成的碱减量助剂,能够在保证聚酯纤维强度的同时,降低烧碱的用量提高了聚酯纤维毯的柔软性和悬垂性,在再生聚酯切片中加入抗静电剂,抗静电剂为乙氧基化烷基胺、乙氧基化硬脂酞胺、乙氧基化月桂酷胺中的其中一种,这些抗静电剂可以降低聚酯纤维毯摩擦产生的静电。(The invention discloses a polyester fiber blanket grafted chitosan process finishing method, which comprises the steps of putting polyester fiber slices into a sodium hydroxide solution with the mass fraction of 15% -20% for alkali washing, simultaneously adding 5g of alkali reduction auxiliary agent into the sodium hydroxide solution, mixing and stirring for 30min, and removing sodium ions in the solution through deionized water equipment; taking 5g of acetic acid solution, putting chitosan powder into the acetic acid solution, and dissolving the chitosan powder in the acetic acid solution; the aqueous solution of polyester fiber chips in S1 and the chitosan solution in S2 were added to 200ml of water in this order. The alkali deweighting auxiliary agent composed of the quaternary ammonium salt can ensure the strength of the polyester fiber, reduce the consumption of caustic soda and improve the flexibility and the drapability of the polyester fiber blanket, and the antistatic agent is added into the regenerated polyester slice, is one of ethoxylated alkylamine, ethoxylated stearylamine and ethoxylated laurylamine, and can reduce static electricity generated by the friction of the polyester fiber blanket.)

1. A polyester fiber blanket grafting chitosan process finishing method comprises the following steps:

s1: putting polyester fiber slices into 15-20% of sodium hydroxide solution for alkali washing, simultaneously adding 5g of alkali decrement auxiliary agent into the sodium hydroxide solution, mixing and stirring for 30min, and removing sodium ions in the solution through deionized water equipment;

s2: taking 5g of acetic acid solution, putting chitosan powder into the acetic acid solution, and dissolving the chitosan powder in the acetic acid solution;

s3: sequentially adding the polyester fiber slice aqueous solution in S1 and the chitosan solution in S2 into 200ml of water, then carrying out graft copolymerization on the polyester fiber slice and the chitosan by taking ammonium persulfate as an initiator and vinyl acetate as a monomer, and stirring the mixed solution for 45 min;

s4: drying the stirred mixed solution in a dryer at the temperature of 95 ℃ for 2-3h to obtain a regenerated polyester slice, and keeping the water content of the regenerated polyester slice to be lower than 0.5-0.7%;

s5: adding 50ml of antistatic agent into the regenerated polyester chips, adding the regenerated polyester chips into a single-screw extruder, heating the regenerated polyester chips into a melt, feeding the melt into a spinning box, spraying polyester yarns through a spinning assembly, cooling the polyester yarns through a yarn strip cooling device, collecting the polyester yarns onto a spinneret plate, and finally spinning the polyester yarns into a polyester fiber blanket through a spinning machine.

2. The polyester fiber blanket-grafted chitosan technological finishing method according to claim 1, wherein the pH value of the sodium hydroxide solution is 7.5-9, and the temperature of the sodium hydroxide solution is 60-65 ℃.

3. The polyester fiber blanket-grafted chitosan process finishing method as claimed in claim 1, wherein the component of the alkali weight reducing auxiliary agent is quaternary ammonium salt.

4. The polyester fiber carpet grafting chitosan technological finishing method according to claim 1, wherein the stirring mode in S3 is straight blade stirring, wherein n-50-80 rpm, v-3-4 m/S.

5. The polyester fiber blanket grafted chitosan process finishing method as claimed in claim 1, wherein the temperature of the regenerated polyester chips when being hot-melted into a melt is 220 ℃, and the hot-melting time is 5-7 min.

6. The polyester fiber blanket graft chitosan process finishing method of claim 1, wherein the antistatic agent is one of ethoxylated alkylamine, ethoxylated stearidonamide and ethoxylated lauramide.

Technical Field

The invention relates to the technical field of fabric production, in particular to a technical finishing method for grafting chitosan on a polyester fiber blanket.

Background

Polyester fibers, commonly known as "dacron". The PET fiber is a synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acid and dihydric alcohol, is called PET fiber for short, and belongs to a high molecular compound. Invented in 1941, is the first major variety of current synthetic fibers. The polyester fiber has the advantages of good crease resistance and shape retention, high strength and elastic recovery capability. It is firm and durable, has the functions of resisting wrinkle, preventing ironing and preventing hair from sticking.

In order to improve the performance of the polyester fiber, sodium hydroxide is usually added in the process of preparing the polyester fiber for alkali washing, but a large amount of sodium hydroxide is easily needed in the alkali washing process, so that the preparation cost is overhigh, and static electricity is easily generated in the production process and the wearing process of the polyester fiber fabric. Static electricity generated by rubbing polyester fibers can irritate human bodies to cause discomfort, and serious people can cause ineffective damage to instrument elements and possibly cause fire in serious cases.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a polyester fiber blanket grafted chitosan process finishing method.

In order to achieve the purpose, the invention adopts the following technical scheme, which comprises the following steps:

s1: putting polyester fiber slices into 15-20% of sodium hydroxide solution for alkali washing, simultaneously adding 5g of alkali decrement auxiliary agent into the sodium hydroxide solution, mixing and stirring for 30min, and removing sodium ions in the solution through deionized water equipment;

s2: taking 5g of acetic acid solution, putting chitosan powder into the acetic acid solution, and dissolving the chitosan powder in the acetic acid solution;

s3: sequentially adding the polyester fiber slice aqueous solution in S1 and the chitosan solution in S2 into 200ml of water, then carrying out graft copolymerization on the polyester fiber slice and the chitosan by taking ammonium persulfate as an initiator and vinyl acetate as a monomer, and stirring the mixed solution for 45 min;

s4: drying the stirred mixed solution in a dryer at the temperature of 95 ℃ for 2-3h to obtain a regenerated polyester slice, and keeping the water content of the regenerated polyester slice to be lower than 0.5-0.7%;

s5: adding 50ml of antistatic agent into the regenerated polyester chips, adding the regenerated polyester chips into a single-screw extruder, heating the regenerated polyester chips into a melt, feeding the melt into a spinning box, spraying polyester yarns through a spinning assembly, cooling the polyester yarns through a yarn strip cooling device, collecting the polyester yarns onto a spinneret plate, and finally spinning the polyester yarns into a polyester fiber blanket through a spinning machine.

Preferably, the pH of the sodium hydroxide solution is 7.5-9 and the temperature of the sodium hydroxide solution is 60-65 ℃.

Preferably, the alkali weight reduction auxiliary agent is a quaternary ammonium salt.

Preferably, the stirring mode in S3 is flat blade stirring, wherein n is 50-80rpm, and v is 3-4 m/S.

Preferably, the temperature of the regenerated polyester chip when the regenerated polyester chip is hot-melted into a melt is 220 ℃, and the hot-melting time is 2 min.

Preferably, the antistatic agent is one of ethoxylated alkylamine, ethoxylated stearidonamide and ethoxylated lauramide.

The invention has the beneficial effects that:

1. according to the polyester fiber blanket grafted chitosan process finishing method provided by the invention, the alkali decrement auxiliary agent consisting of quaternary ammonium salt can reduce the amount of caustic soda while ensuring the strength of the polyester fiber, the amount of the caustic soda can be reduced to 10.5g/l, the softness and drapability of the polyester fiber blanket are improved, meanwhile, the alkali decrement auxiliary agent can realize rapid, balanced and stable alkali decrement finishing of the polyester silk-like fabric under low alkali concentration, and the effect of decrement rate is obvious;

2. according to the technical finishing method for grafting chitosan on the polyester fiber blanket, the antistatic agent is added into the regenerated polyester slice, the antistatic agent is one of ethoxylated alkylamine, ethoxylated stearidonamide and ethoxylated laurel amine, and the antistatic agent can reduce static electricity generated by friction of the polyester fiber blanket and greatly improve the production quality of the polyester fiber blanket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1: a polyester fiber blanket grafting chitosan process finishing method comprises the following steps:

s1: putting polyester fiber slices into a sodium hydroxide solution with the mass fraction of 15% for alkali washing, wherein the pH value of the sodium hydroxide solution is 7.5, the temperature of the sodium hydroxide solution is 60 ℃, simultaneously adding 5g of an alkali reduction auxiliary agent into the sodium hydroxide solution, the alkali reduction auxiliary agent comprises a quaternary ammonium salt, mixing and stirring for 30min, and removing sodium ions in the solution through deionized water equipment;

s2: taking 5g of acetic acid solution, putting chitosan powder into the acetic acid solution, and dissolving the chitosan powder in the acetic acid solution;

s3: adding the polyester fiber slice aqueous solution in S1 and the chitosan solution in S2 into 200ml of water in sequence, then using ammonium persulfate as an initiator and vinyl acetate as monomers to perform graft copolymerization on the polyester fiber slice and the chitosan, and stirring the mixed solution for 45min, wherein the stirring mode in S3 is straight-leaf stirring, wherein n is 50-80rpm, and v is 3-4 m/S;

s4: drying the stirred mixed solution in a dryer at the temperature of 95 ℃ for 2-3h to obtain a regenerated polyester slice, and ensuring that the water content of the regenerated polyester slice is lower than 0.5% -0.7%;

s5: adding 50ml of antistatic agent into the regenerated polyester chip, wherein the antistatic agent is one of ethoxylated alkylamine, ethoxylated stearylphthalimide and ethoxylated laurylsulfonamide, adding the regenerated polyester chip into a single-screw extruder, heating the regenerated polyester chip into a melt, carrying out hot melting on the regenerated polyester chip into the melt at 220 ℃ for 2min, feeding the melt into a spinning box, spraying polyester filaments through a spinning assembly, cooling the polyester filaments through a filament cooling device, collecting the polyester filaments on a spinneret plate, and finally spinning the polyester filaments into a polyester fiber blanket through a spinning machine.

Example 2: a polyester fiber blanket grafting chitosan process finishing method comprises the following steps:

s1: putting polyester fiber slices into a sodium hydroxide solution with the mass fraction of 20% for alkali washing, wherein the pH value of the sodium hydroxide solution is 9, the temperature of the sodium hydroxide solution is 65 ℃, simultaneously adding 5g of an alkali reduction auxiliary agent into the sodium hydroxide solution, mixing and stirring the components of the alkali reduction auxiliary agent which is quaternary ammonium salt for 30min, and removing sodium ions in the solution through deionized water equipment;

s2: taking 5g of acetic acid solution, putting chitosan powder into the acetic acid solution, and dissolving the chitosan powder in the acetic acid solution;

s3: adding the polyester fiber slice aqueous solution in S1 and the chitosan solution in S2 into 200ml of water in sequence, then using ammonium persulfate as an initiator and vinyl acetate as monomers to perform graft copolymerization on the polyester fiber slice and the chitosan, and stirring the mixed solution for 45min, wherein the stirring mode in S3 is straight-leaf stirring, wherein n is 50-80rpm, and v is 3-4 m/S;

s4: drying the stirred mixed solution in a dryer at the temperature of 95 ℃ for 2-3h to obtain a regenerated polyester slice, and ensuring that the water content of the regenerated polyester slice is lower than 0.5% -0.7%;

s5: adding 50ml of antistatic agent into the regenerated polyester chip, wherein the antistatic agent is one of ethoxylated alkylamine, ethoxylated stearylphthalimide and ethoxylated laurylsulfonamide, adding the regenerated polyester chip into a single-screw extruder, heating the regenerated polyester chip into a melt, carrying out hot melting on the regenerated polyester chip into the melt at 220 ℃ for 2min, feeding the melt into a spinning box, spraying polyester filaments through a spinning assembly, cooling the polyester filaments through a filament cooling device, collecting the polyester filaments on a spinneret plate, and finally spinning the polyester filaments into a polyester fiber blanket through a spinning machine.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover any one of the technical aspects of the present invention and the equivalent alternatives or modifications thereof within the technical scope of the present invention.