阅读说明：本技术 一种阻燃抓绒面料及其制备方法 (Flame-retardant fleece fabric and preparation method thereof ) 是由 毕慎平 王双 胡金龙 冉国庆 王宝剑 于 2018-07-16 设计创作，主要内容包括：本发明公开了一种阻燃抓绒面料及其制备方法,该面料由SOL FR纤维、阻燃腈纶、导电纤维以及聚酰亚胺纤维或芳砜纶混纺制成。本发明所生产的抓绒面料具有良好的吸湿性、透气性,在兼顾了面料的舒适性及永久阻燃性的同时,还具有抗菌防螨及远红外功能。(The invention discloses a flame-retardant fleece fabric and a preparation method thereof. The fleece fabric produced by the invention has good hygroscopicity and air permeability, and has the functions of antibiosis, mite prevention and far infrared while taking the comfort and permanent flame retardance of the fabric into consideration.)

1. The flame-retardant fleece fabric is characterized in that: is made by blending SOL FR fiber, flame retardant acrylic fiber, conductive fiber and polyimide fiber or polysulfonamide fiber.

2. The flame-retardant fleece fabric according to claim 1, wherein: the weight ratio of the four-component fiber material is as follows: the SOLFR is: polyimide fiber: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)%.

3. The flame-retardant fleece fabric according to claim 1, wherein: the weight ratio of the four-component fiber material is as follows: the SOLFR is: polysulfonamide: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)%.

4. The flame-retardant fleece fabric according to claim 1, wherein: the fiber linear density of the flame-retardant fleece fabric is 1.33 dtex-3.33 dtex.

5. The flame-retardant fleece fabric according to claim 1, wherein: the limit oxygen index of the flame-retardant fleece fabric is more than 32%.

6. The flame-retardant fleece fabric according to claim 1, wherein: the normal phase emissivity of the flame-retardant fleece fabric is more than 0.86.

7. The flame-retardant fleece fabric according to claim 1, wherein: the antibacterial rate of escherichia coli (8099) of the flame-retardant fleece fabric is more than 85%, the antibacterial rate of staphylococcus aureus (ATCC6538) is more than 85%, the antibacterial rate of candida albicans (ATCC 10231) is more than 80%, and the repelling rate of dust mites is more than 70%.

8. The flame-retardant fleece fabric according to claim 1, wherein: the flame-retardant fleece fabric comprises flame-retardant polar fleece and flame-retardant coral fleece.

9. A preparation method of the flame-retardant fleece fabric comprises the following steps:

the first step is as follows: uniformly mixing various flame-retardant fibers according to a blending formula to spin spun yarns;

wherein, each flame-retardant fiber is four components of SOL FR, polyimide fiber, flame-retardant acrylic fiber and conductive fiber or four components of SOLFR, polysulfonamide, flame-retardant acrylic fiber and conductive fiber;

wherein the flame-retardant fiber blending formula is SOL FR: polyimide fiber: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)% or SOL FR: polysulfonamide: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)%;

wherein the flame-retardant fiber blending step comprises the following steps: the method comprises the steps of opening picking, cotton carding, drawing, roving and spinning;

the second step is that: weaving grey cloth: taking flame-retardant polyester filament as a bottom yarn and four-component blended spun yarns as a face yarn, and carrying out weft knitting to obtain grey cloth;

the third step: dyeing and after-finishing, the process comprises: gray fabric inspection-presetting → dyeing → dehydration → drying → preshrinking → napping → carding → shearing → tentering and setting → cropping → finished product inspection.

10. The method of claim 9, wherein: the specification of the flame-retardant polyester filament is 75D/48F or 120D/60F, and the linear density of other flame-retardant fibers is required to be 1.33 dtex-3.33 dtex.

Technical Field

The invention belongs to the technical field of textile disciplines, and relates to a flame-retardant fleece fabric and a preparation method thereof.

Background

Most of fleece fabrics on the market at present are woven by polyester fibers, and although the fleece fabrics are good in softness, the fleece fabrics are poor in moisture absorption and breathability, easy to generate static electricity, inflammable and accompanied with the defects of melting and dripping.

Disclosure of Invention

The technical problems solved by the invention are as follows: in order to overcome the defects that the existing fleece fabric on the market is poor in comfort, easy to generate static electricity and inflammable, the fleece fabric is good in comfort, high in flame retardance and free of melting and dripping.

According to the first aspect of the invention, the flame-retardant fleece fabric is prepared by blending SOL FR fibers, flame-retardant acrylic fibers, conductive fibers and polyimide fibers or polysulfonamide fibers.

In certain preferred embodiments, the flame-retardant fleece fabric is made of the following four-component fiber materials (by weight): SOL FR: polyimide fiber: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)% of the total fiber.

In certain preferred embodiments, the flame-retardant fleece fabric is made of the following four-component fiber materials (by weight): SOL FR: polysulfonamide: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)% of the total fiber.

Preferably, the fiber linear density of the flame-retardant fleece fabric is 1.33dtex to 3.33dtex, and the gram weight is 200 g/square meter to 400 g/square meter.

Wherein, SOL FR refers to the flame-retardant regenerated cellulose fiber produced by Beijing Sailolan flame-retardant fiber Co., Ltd, and other fibers adopt the varieties widely sold in the market. The SOL FR is specifically named as multi-element synergistic flame-retardant regenerated cellulose fiber, and the fiber is formed by forming a silk fiber structure by a cross-linked network of cellulose, multi-element synergistic flame retardant and cationic cross-linking agent. The manufacturing process of the fiber comprises the following steps: the method takes alpha-cellulose, multi-element synergistic flame retardant and cationic cross-linking agent as raw materials and comprises the steps of dipping, squeezing, crushing, ageing, yellowing, filtering, glue mixing, balancing, spinning, drafting, cross-linking, refining and drying.

Wherein, the multi-element synergistic flame retardant is composed of a plurality of flame retardant elements, comprises Si, P, N and B elements and is prepared by multi-step synthesis and blending. In a specific case, the multi-element synergistic flame retardant is prepared by taking DDPS (2, 2 '-oxo-bis (5, 5-dimethyl-1, 3, 2-dioxaphosphane-2, 2' -disulfide)), polyborosiloxane, a silica sol dispersant and carbodiamide as raw materials through a blending synthesis process. More specifically, in the preparation process, the weight ratio of DDPS, polyborosiloxane, silica sol dispersant and carbodiamide is 1 (1-2): (8-10): 2-2.5. More particularly, the silica sol dispersing agent is prepared by reacting silica sol with NaOH solution.

Wherein the cation cross-linking agent is a cross-linking agent code T-4 provided by Oshenlan of Beijing, wherein the cation Me is Ti, Ca and/or Al.

In the manufacturing process of the multi-element synergistic flame-retardant regenerated cellulose fiber, the multi-element synergistic flame retardant is added into the IIF viscose, the stirring time is more than or equal to 0.5h, and the balance time is more than or equal to 1 h. Wherein, the IIF viscose glue comprises the following components: 8.1-9.8% of methyl fiber and 5.4-7.8% of NaOH. The colloid viscosity is 40-60 seconds (falling ball method), and the ripening degree is 14-16 ml (10% ammonium chloride). The mixing proportion is as follows: 80-92% of IIF viscose and 8-20% of flame retardant. The flame retardant is added at the position of the IIF adhesive, so that the flame retardant and the adhesive are not gelatinized within the time required by the spinning process after being mixed; in the post-finishing process, the cationic cross-linking agent is added, so that the flame retardant components in the fibers form a net insoluble matter, the flame retardant components are not easy to lose, and continuous and large-scale production is realized.

In the manufacturing process of the multi-element synergistic flame-retardant regenerated cellulose fiber, the spinning procedure requires that the acid bath comprises the following components: 70-145 g/L of sulfuric acid, 220-350 g/L of sodium sulfate and 14-90 g/L of zinc sulfate. The acid bath temperature is 36-55 ℃, and the acid value drop is less than 4 g/L.

In the manufacturing process of the multi-element synergistic flame-retardant regenerated cellulose fiber, an alkali washing desulfurization step is eliminated in a refining process, a crosslinking process is added after secondary washing, the dosage of a cationic crosslinking agent is 0.5-0.8 time of the dosage of cellulose, the treatment time is more than or equal to 15min, and the treatment temperature is more than or equal to 75 ℃.

The multi-element synergistic flame-retardant regenerated cellulose fiber prepared by the technical scheme comprises 65-85% of methyl cellulose, 1-3% of cation Me (Ti, Ca and Al) and SiO₂14-16%, P4-6%, B1-2%, and N1-2%. The dry breaking strength of the formed fiber is more than or equal to 1.85cN/dtex, the water content is 8-15%, the original form of the fiber can be kept under the aerobic condition at 1100 ℃, and the fabric can form a shielding protective layer，LOI≥30％。

According to a second aspect of the invention, a preparation method of the flame-retardant fleece fabric is provided, which comprises the following steps:

the first step is as follows: uniformly mixing various flame-retardant fibers according to a blending formula to spin spun yarns;

wherein, the flame-retardant fibers are four components of SOL FR, polyimide fibers, flame-retardant acrylic fibers and conductive fibers or four components of SOL FR, polysulfonamide, flame-retardant acrylic fibers and conductive fibers.

Wherein the flame-retardant fiber blending formula is SOL FR: polyimide fiber: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)% or SOL FR: polysulfonamide: flame-retardant acrylic fibers: the conductive fiber is (20-40)%: (20-40)%: (20-40)%: (1-3)%.

Wherein the flame-retardant fiber blending step comprises the following steps: the method comprises the steps of opening picking, cotton carding, drawing, roving and spinning.

The second step is that: weaving grey cloth: the flame-retardant polyester filament yarn is used as a bottom yarn, the four-component blended spun yarn is used as a face yarn, and the grey cloth is formed by weft knitting.

The third step: dyeing and after-finishing, the process comprises: gray fabric inspection-presetting → dyeing → dehydration → drying → preshrinking → napping → carding → shearing → tentering and setting → cropping → finished product inspection.

Preferably, the specification of the flame-retardant polyester filament is 75D/48F or 120D/60F, and the linear density of other flame-retardant fibers is required to be 1.33 dtex-3.33 dtex.

The fleece fabric produced by the invention has good hygroscopicity and air permeability, and has the functions of antibiosis, mite prevention and far infrared while taking the comfort and permanent flame retardance of the fabric into consideration. Can be made into various forms such as flame-retardant polar fleece, flame-retardant coral fleece and the like.

Detailed Description

The following examples are included to aid in the understanding of the invention, but are not intended to limit the invention otherwise.