WO2017054698A1 - Blending of organic silicon-nitrogen flame retardant viscose staple fibre - Google Patents

Abstract

A flame retardant staple fibre yarn and a preparation method therefor, and a weaving method for a fabric prepared therefrom. The flame retardant staple fibre yarn is prepared by blending organic silicon-nitrogen flame retardant viscose staple fibres and one or more fibres selected from polyimide, flame retardant acrylic, flame retardant dacron, wool, conductive fibres, aramid 1313 and polysulphonamide, wherein the organic silicon-nitrogen flame retardant viscose staple fibres contain cellulose and a silicon-nitrogen flame retardant. The fabric prepared by the weaving method not only maintains comfortability, but also has higher flame retardance, and has both good corrosion resistance and light resistance and a certain bacteriostatic effect.

Description

Blend of silicone-nitrogen flame retardant viscose staple fiber

This application claims the Chinese invention patent application filed on September 28, 2015 with the application number 201510628333.3 and the name "blend of silicone-silicon flame retardant viscose staple fiber and polyimide", submitted on September 28, 2015. The application number is 201510628159.2, the Chinese invention patent application titled "blend of silicone-silicon flame retardant viscose staple fiber and aramid 1313", and the application number submitted on September 28, 2015 is 201510626975.X "silicone nitrogen resistance Chinese invention patent application for blending of viscose staple fiber and flame-retardant polyester, China's invention filed on September 28, 2015 with application number 201510626919.6 "blend of silicone-silicon flame-retardant viscose staple fiber and flame-retardant acrylic fiber" The patent application, the application number submitted on September 28, 2015 is 201510628189.3, the Chinese invention patent application entitled “silicone-nitrogen flame retardant viscose staple fiber, blend of wool and conductive fiber” and submitted on July 26, 2016 Priority is claimed on Chinese Patent Application No. 201610595253.7, entitled "Flame-Smooth Flame Retardant Viscose Staple Fiber and Aromatic Sulfone Blend". The entire text of the above application is incorporated herein by reference.

Technical field

The present invention relates to blending of fibers of different properties and related applications of the resulting products.

Background technique

Whether synthetic fibers, viscose fibers or natural cotton fibers are flammable and cause fire. Although the flame retardant fiber produced by adding flame retardant to viscose fiber can play a certain flame retardant effect, the flame retardant fiber commonly used in the market is often insufficient in strength, and it cannot be used in applications such as wear resistance and deformation resistance. Satisfied.

Summary of the invention

It is an object of the present invention to provide a blended flame retardant product which provides at least the durability of the fabric while providing flame retardancy.

According to a first aspect of the present invention, there is provided a flame-retardant spun yarn comprising a silicone-nitrogen flame-retardant viscose staple fiber selected from the group consisting of polyimide, flame-retardant acrylic, flame-retardant polyester, wool, and conductive fiber It is made by blending one or more fibers of wei, aramid 1313 and polysulfonamide. Among them, the organosilicon nitrogen flame retardant viscose staple fiber contains cellulose and silicon nitride flame retardant.

The silicone nitrogen flame retardant viscose staple fiber may contain 60-80% by weight of cellulose and 10-30% by weight of a silicon-nitrogen flame retardant; or may further contain 1.5-2.5% by weight of cationic cross-linking. Agent. The ionic form of the cationic crosslinking agent may be Ti ⁴⁺ , RN ³⁺ , Al ³⁺ . In a preferred embodiment of the present invention, the cellulose-nitrogen flame-retardant viscose staple fibers may have a degree of polymerization of 650 to 750. The silicone nitrogen flame retardant viscose staple fiber of the present invention may have a length of 38-120 mm.

Polyimide has excellent mechanical properties and tensile strength up to 400 MPa. The amount of elastic film of polyimide fiber can be as high as 200 Gpa, second only to carbon fiber. In addition, polyimide has good dielectric properties and flame retardancy, and is biocompatible.

In one embodiment of the invention, the flame-retardant spun yarn is made from a blend of silicone-nitrogen flame-retardant viscose staple fibers and polyimide fibers. The weight ratio of the silicone nitrogen flame retardant viscose staple fiber to the polyimide (fiber) may be 95-50:5-50 (that is, between 95:5 and 50:50).

Flame-retardant acrylic fiber is well known and is one of the four major synthetic fibers. Its fluffiness, curling and softness are similar to those of wool. It has a wool-like feel and warmth, but its strength and wear resistance are superior to wool. In addition, the acrylic fabric is easy to wash and dry, and has simple care, light resistance and corrosion resistance.

In another embodiment of the invention, the flame-resistant spun yarn is made of a blend of silicone-nitrogen flame-retardant viscose staple fibers and flame-retardant acrylic fibers. The weight ratio of the silicone nitrogen flame retardant viscose staple fiber to the flame retardant acrylic fiber (fiber) may be between 20:80 and 65:35.

Flame-retardant polyester is well known, and its application range is wide. In addition to industrial textiles, interior decoration, and interior decoration, it plays an irreplaceable role, and it plays a lot of roles in the field of protective clothing. The flame-retardant protective clothing made of flame-retardant polyester has excellent washing resistance, non-toxic, tasteless and non-irritating, safe and reliable to the human body, breathable and moisture-permeable, soft to the touch and comfortable to wear.

In still another embodiment of the present invention, the flame-retardant spun yarn is made of a silicone-nitrogen flame-retardant viscose staple fiber and a flame-retardant polyester blend. The weight ratio of the silicone nitrogen flame retardant viscose staple fiber to the flame retardant polyester (fiber) may be between 20:80 and 65:35.

In still another embodiment of the present invention, the flame-retardant spun yarn is made of a blend of silicone-nitrogen flame-retardant viscose staple fibers, wool and conductive fibers, wherein the weight of the short fibers is 10-50, and the weight of the wool The parts are 50-90, and the conductive fibers are 0.5-1 parts by weight. In the present invention, the electrically conductive fiber may be any suitable fiber such as a conductive carbon fiber having a resistivity of less than 105 Ω·cm (20 ° C, 65% humidity). In a preferred embodiment of the invention, the electrically conductive fibers have a resistivity of from 1 × 10 ^-1 to 1 × 10 ^-5 Ω·cm; more preferably from 1 × 10 ^-3 to 1 × 10 ^-4 Ω·cm. Conductive fibers having too high or too low electrical resistivity can adversely affect other related properties of the resulting fabric.

In the present invention, there is no particular requirement for wool as long as it can maintain the hand and warmth of ordinary wool. A preferred embodiment of the invention utilizes a 70 s anti-shrinkage wool.

Aramid 1313, also known as meta-aramid fiber (PMIA), has good mechanical properties (breaking strength is higher than ordinary polyester, cotton, nylon, etc., elongation is large, soft handfeel, good spinnability), Excellent flame retardant and heat resistance (limital oxygen index (LOI) is greater than 28, so it will not continue to burn when it leaves the flame; it will not melt and melt under high temperature conditions, and will start to carbonize when the temperature is close to 400 degrees Celsius. ; and will not reduce or lose flame retardant performance due to the use time and washing times), stable chemical properties (with excellent resistance to most chemicals, can withstand most high concentrations of inorganic acids, good alkali resistance at room temperature) ), excellent radiation resistance (the strength remains unchanged under the long-term illumination of 1.2×10 ^-2 W/in ² ultraviolet ray and 1.72×108 rad γ ray); good durability (after 100 washings, The tearing strength can still reach more than 85% of the original strength).

In another embodiment of the invention, the flame resistant spun yarn is made from a blend of silicone nitrogen flame retardant viscose staple fibers and aramid 1313. The weight ratio of the silicone nitrogen flame retardant viscose staple fiber to the aramid 1313 may be between 20:80 and 80:20.

Polysulfonamide (polyphenylsulfone terephthalamide fiber), abbreviation: PSA. It is significantly better than aramid in anti-combustion and anti-heat aging. It is heated in hot air at 300 °C for 100h, the strength loss is less than 5%, the limiting oxygen index is over 33; there is good dyeability, electrical insulation and chemical corrosion resistance. , anti-radiation and so on.

In still another embodiment of the present invention, the flame-retardant spun yarn is made of a blend of silicone-nitrogen flame-retardant viscose staple fibers and a polysulfonamide. The weight ratio of the organosilicon nitrogen flame retardant viscose staple fiber to the polysulfonamide can be 20-50:50-80.

According to a second aspect of the present invention, there is provided a method of producing a flame-retardant spun yarn according to the first aspect. The method includes:

Providing a flame retardant viscose staple fiber comprising the steps of:

Making cellulose into a viscose collagen solution;

The silicon nitrogen flame retardant is formulated into a flame retardant liquid;

Spinning the flame retardant liquid immediately after mixing with the spinning viscous collagen solution;

Cutting the spun fiber into short fibers of a predetermined length;

Curing and desulfurizing the short fibers by using a cationic crosslinking agent to obtain flame retardant viscose staple fibers having stable flame retardancy;

The flame-retardant viscose staple fiber is blended with one or more fibers selected from the group consisting of polyimide, flame-retardant acrylic, flame-retardant polyester, wool, conductive fiber, aramid 1313, and polysulfonamide to obtain a predetermined ratio. Flame retardant spun yarn.

In a particular embodiment of the invention, the blending comprises a cotton cleaning step, a carding step, a drawing step, a roving step, and a spinning step. The corresponding process parameters for each step are as follows.

In the process of opening the cotton: the comprehensive beater speed is 750r/min, the lap speed of the lap is 11r/min, the dry weight of the lap is 380g/m, and the length is 30.6m.

In the carding step: the speed of the cylinder is 300r/min, the speed of the doffer is 28r/min, the speed of the licking roller is 700r/min; the dust removing knife is 6mm above the horizontal plane of the frame, the installation angle is 95°; the distance between the dust removing knife and the licking roller 0.36mm, the distance between the licker and the cotton board is 0.38mm, and the four-point spacing between the cylinder and the cover is 0.28mm, 0.25mm, 0.25mm, 0.28mm respectively; the dry weight of the raw strip is 16.78g/5m The sliver rate (≤20mm) is 4.20%.

In the step of drawing: multiple draws, tight pressure and 5-6m/min.

In the roving step: dry quantitative 3.35g/5m, roller center distance 42mm × 55mm × 67mm, rear zone draft 1.16 times, front roller speed 195r / min, 捻 coefficient 68.

In the spinning step: the center distance of the roller is 43×58, the rear zone is 1.165 times, the twist factor is 335, and the front roller speed is 205 r/min.

The staple fiber size prepared according to the process of the present invention can be within a wide range from 1.0D to 6.0D (representing the weight per unit length).

According to a third aspect of the invention, there is provided a method of weaving a fabric comprising:

Providing a flame-resistant spun yarn prepared by the method of the second aspect of the invention;

The following treatments are applied to the flame retardant spun yarn:

High temperature vacuum steaming treatment, wherein the degree of vacuum is -0.08 MPa, the temperature is 95-115 ° C, and the treatment time is about 2 hours;

Warping treatment: warping pressure is 0.4MPa, warping speed is 400m/min;

Sizing treatment: the slurry comprises 50 parts by weight of low-viscosity phosphate starch, 12.5 parts of PVA-1799 and 6 parts of acrylic slurry, wherein the slurry has a solid content of 5%, an unpacking viscosity of 11 s, and a slurry viscosity of 5 s;

Wear treatment: the comprehensive method is {(1, 5), (3, 2), (6, 4)} × 12, (9, 5, 11), (12, 9, 5), (11, 12 , 9), (5, 11, 12), {(1, 7), (3, 2), (8, 4)} × 16, {(1, 5), (3, 2), (6, 4)}×4.

In a preferred embodiment, the present invention also carefully selects and designs the yarn: the warp and weft yarns can be JC 9.7 tex (1950 Å/m) strong twist yarn and arranged in 2S: 2Z. This choice of design makes the fabric feel comfortable after printing and dyeing, and has a faint curling effect.

In summary, the present invention has at least the following advantages: not only solves the environmental hazard of the halogen or phosphorus-based flame retardant, but also makes the flame-retardant spun yarn and the fabric and fabric thereof produced with higher flame retardancy and softness. Degree, greatly reducing the smoke generated during combustion and harm to the human body, and also improving the radiation resistance and durability of the flame retardant viscose staple fibers and fabrics thereof.

The fabric and the garment fabric made according to the invention not only maintain the unique performance of the viscose fiber, but also have higher flame retardancy, low smoke combustion, safety and environmental protection, and excellent corrosion resistance and light resistance. (Sun resistance) and certain antibacterial effects.

detailed description

Unless otherwise stated, the terms used in the present invention are all terms commonly used in the field of textiles.

The flame-retardant spun yarn of the present invention is made from a blend of silicone-nitrogen flame-retardant viscose staple fibers and other existing fibers. The organosilicon nitrogen flame retardant viscose staple fiber of the present invention contains a cellulose and a silicon nitride flame retardant. The silicone nitrogen flame retardant viscose staple fiber may contain 70-80% by weight of cellulose and 20-30% by weight of a silicon-nitrogen flame retardant; or may further contain 1.5-2.5% by weight of cationic cross-linking. Agent. The ionic form of the cationic crosslinking agent may be Ti ⁴⁺ , RN ³⁺ , Al ³⁺ . In a preferred embodiment of the present invention, the cellulose-nitrogen flame-retardant viscose staple fibers may have a degree of polymerization of 650 to 750. The silicone nitrogen flame retardant viscose staple fiber of the present invention may have a length of 38 to 120 mm.

The silicon nitride flame retardant used in the present invention may be a silica nitrogen compound. For example, an organosilane hydrolysis dispersion having a chemical formula of [Me _x O _y · nSiO ₂ ] + [--CONH], wherein Me represents a metal ion such as Ti ⁴⁺ , Ca ²⁺ , Li ⁺ , Na ⁺ , The content of K ⁺ and SiO ₂ is 9.23-53%; the content of amide [-CONH] is 4.3-27%. The metal ion Me is preferably Ti ⁴⁺ and Ca ²⁺ , and the silicon, titanium and calcium elements in the flame retardant are combined on the cellulose main chain to form a silicon titanium calcium ceramic network, which constitutes a far infrared emitting group, especially when silicon When the ratio of titanium to calcium (molar ratio) is from 1 to 10:1 to 5:1 to 23, the final product having the best radiation resistance can be obtained. With regard to the silicon-nitrogen flame retardant, reference is also made to the applicant's prior patent application CN104032401A and CN103789858A, the entire contents of each of which are hereby incorporated by reference. In a preferred embodiment of the invention, the silicon-nitrogen flame retardant is a 801 ^# silicon-nitrogen flame retardant produced and sold by Beijing Sauerland Flame Retardant Fiber Co., Ltd.

The following is the manufacturing process of the flame-retardant spun yarn of the present invention:

FA002 cotton picking machine→SFA035C mixed opener→FA56B comb opener→SFA161 vibrating cotton box to cotton machine→A076E single hand winder→FA231 carding machine→FA311F draw frame →FA311F draw frame→FA311F draw frame→FA423A roving machine→FA506 spinning frame→GA013 winder→packing.

The specific process parameters of each corresponding process/step are as follows:

Open cleaning process

The comprehensive beater speed is 750r/min, the lap speed of the lap is 11r/min, the dry weight of the lap is 380g/m, and the length is 30.6m.

Carding process

The speed of the cylinder is 300r/min, the speed of the doffer is 28r/min, the speed of the licking roller is 700r/min; the dust knives are 6mm above the water level of the frame, the installation angle is 95°; the distance between the dust knives and the licker is 0.36mm, the licker The distance from the cotton board is 0.38mm, and the four-point spacing between the cylinder and the cover is 0.28mm, 0.25mm, 0.25mm, 0.28mm. The dry weight is 16.78g/5m, and the sliver rate is (≤20mm) is 4.20%.

Drawing process

In order to ensure the correct and good cooked strips and mixing quality, the process is arranged in multiple times, with a tight pressure and a small take-up speed of 5-6 m/min.

Roving process

The dry weight is 3.35g/5m, the center of the roller is 42mm×55mm×67mm, the rear zone is 1.16 times, the front roller speed is 195r/min, and the twist coefficient is 68.

Spinning process

The center of the roller is 43×58, the rear zone is 1.165 times, the twist factor is 335, and the front roller speed is 205r/min.

The fabric weaving process of the present invention is:

Steaming (setting) → warping → sizing → piercing → weaving → inspection → classification → woven → finished product.

The invention may further comprise a dyeing and finishing process:

Singeing → overflowing and bleaching → mercerizing → overflow dyeing → loose drying → soft → pre-shrinking.

The specific steps/steps of the fabric weaving of the present invention are as follows:

Yarn preparation

Carefully overhaul the equipment to ensure that the spindles operate flexibly, the tension is uniform, and the operation is strictly controlled to avoid artificial collapse;

Steamed yarn

Vacuuming → preheating → humidification → heat preservation (constant temperature) → vacuum cooling → end. The vacuum is 8 min, the specified vacuum is -0.08 MPa, the temperature is 95-115 ° C, and the high temperature and high pressure steaming yarn is 120 min.

Warping

Using the D-type gold warping machine, adopting the medium tension and medium elongation process route, the yarn tension is reduced under the premise of uniform tension of the yarn, and some preparations are made for reducing the later retraction. The fabric has a total of 5,632 pieces, and the axis is Z捻: 704×4, S捻: 704×4, and a total of 8 axes. With an adjustable warping frame, the angle is maintained at 45°, keeping the tension of the entire warp yarn consistent. The warping pressure is 0.4 MPa, and the warping speed is 400 m/min.

sizing

Slurry formula: low viscosity phosphate starch 50kg, PVA-179912.5kg, acrylic pulp (P-T) 6kg, slurry solid content 5%, unpacking viscosity 11s, pulp pot viscosity 5s.

Sizing machine

The sizing is carried out by a seven-unit transmission GA 308 sizing machine. The sizing adopts a double-slot double-dip double-pressure non-separating laminating process, and the control dipping depth is 20 cm, and the unwinding tension is appropriately increased to ensure that the speed is not too fast. And use hydrophilic fibers.

Wear

The No. 78 steel shovel is used, the ground yarn is entangled twice, the warp yarn is circulated by 204, and 12 pieces of healds are used. The wearing method is {(1, 5), (3, 2), (6, 4)}×12 , (9, 5, 11), (12, 9, 5), (11, 12, 9), (5, 11, 12), {(1, 7), (3, 2), (8, 4) ) × ×, { (1, 5), (3, 2), (6, 4)} × 4, through the stop 6 columns to wear.

Weaving

Weaving using a Picanol multi-arm air jet loom.

printing and dyeing

Using the caustic soda hydrogen peroxide bath process - straight roll cloth combined with mercerizing machine - overflow dyeing - mechanical soft finishing - pre-shrinking finishing process.

Example 1: Silicon-nitrogen flame retardant viscose fiber and polyimide 65:35 blended flame retardant fabric

The 2D×51mm silicon-nitrogen flame-retardant viscose fiber was blended with polyimide, and the above production method was used to make 15 yarns, twill fabric, and a flame retardant fabric with a weight of 250 g/m ² . It can increase the wearing comfort based on the high temperature resistance and radiation resistance of polyimide, and can be used as special fireproof and protective clothing fabrics.

Example 2: Silicone-nitrogen flame retardant viscose fiber and polyimide 85:15 blended flame retardant fabric

The 2D×51mm silicon-nitrogen flame retardant viscose fiber was blended with polyimide, and the above production method was used to make 16 yarns, twill fabric, and 168 g/m ² flame retardant fabric. It can make the fabric meet the requirements of high flame retardant performance, radiation protection and comfortable wearing. It can be used as a fabric that needs flame retardant and fireproof requirements and can be worn close to the body.

Example 3: Silicon-nitrogen flame retardant viscose fiber and flame retardant acrylic fiber 35:65 blended flame retardant fabric

The 2D×51mm silicon-nitrogen flame-retardant viscose fiber was blended with the flame-retardant acrylic fiber, and the production method in the manual was used to make 10 yarns, twill fabric, and a flame retardant fabric with a weight of 200g/m ² . It can enhance the flame retardancy of the flame retardant acrylic fiber based on its corrosion resistance and light resistance. It can be used as a special fireproof, military training clothing fabric.

Example 4: Silicon Nitrogen Flame Retardant Viscose Fiber and Flame Retardant Acrylic Fiber 65:35 Blended Flame Retardant Fabric

The 2D×38mm silicon-nitrogen flame retardant viscose fiber is blended with the flame retardant acrylic fiber, and the production method in the manual is used to make 20 yarns, twill fabric, and a flame retardant fabric with a weight of 150g/m ² . The fabric can meet the requirements of high flame retardancy, corrosion resistance and light resistance at the same time, and it can be used as a garment fabric that needs flame retardant and fireproof requirements and can be worn close to the body.

Example 5: Silicon Nitrogen Flame Retardant Viscose Fiber and Flame Retardant Polyester 35:65 Blended Flame Retardant Fabric

The 2D×51mm silicon-nitrogen flame retardant viscose fiber is blended with the flame retardant polyester. According to the production method in the manual, 15 yarns, plain cloth and 180g/m ² flame retardant fabric are used. It can enhance the flame retardancy of the flame retardant polyester on the basis of high strength and good wear resistance. It can be used as special protective clothing and military combat clothing fabrics.

Example 6: Silicon Nitrogen Flame Retardant Viscose Fiber and Flame Retardant Polyester 65:35 Blended Flame Retardant Fabric

The 2D×51mm silicon-nitrogen flame-retardant viscose fiber was blended with the flame-retardant polyester. The production method was used to make 16 yarns, plain cloth and 168g/m ² flame-retardant fabric. The fabric can meet the requirements of high flame retardant performance, high strength, non-deformation and comfortable wearing, and can be used as apparel fabrics and home textiles and industrial textiles which require flame retardant and fireproof requirements.

Example 7: Silicon-nitrogen flame retardant viscose fiber and anti-shrinkage wool, conductive fiber 35:64.2:0.8 ratio blended flame retardant fabric

Using a knitting flat knitting machine (sweater), 3D×88mm silicon-nitrogen flame retardant viscose fiber is blended with 70s anti-shrinkage wool and conductive fiber. The yarn count is 36Nm/3, 48Nm/3, and the production method in the manual is adopted. Made of woolen sweater flame retardant fabric. The fabric is made of flame retardant and excellent electrical conductivity; the fabric can be machine washed, the physical indexes are stable, and the anti-pilling effect is good; the skin-friendly performance is excellent, the appearance of the fabric is clear and full, and the hand feels fluffy.

Example 8: Silicon-nitrogen flame retardant viscose fiber and anti-shrinkage wool, conductive fiber 20:79.2:0.8 ratio blended flame retardant fabric

Using a knitting flat knitting machine (sweater), 3D×88mm silicon-nitrogen flame retardant viscose fiber is blended with 70s anti-shrinkage wool and conductive fiber. The yarn count is 36Nm/3, 48Nm/3, and the production method in the manual is adopted. Made of woolen sweater flame retardant fabric. The fabric is made of flame retardant and excellent in electrical conductivity; the fabric can be machine washed, the physical indexes are stable, and the anti-pilling effect is good; the skin-friendly performance is excellent and soft, and the appearance of the fabric is clear and full, and the hand feels fluffy.

Example 9: Silicon-nitrogen flame-retardant viscose fiber blended with mercerized wool and conductive fiber in a ratio of 35:64.2:0.8

Using a circular knitting machine, 2D×76mm silicon-nitrogen flame retardant viscose fiber is blended with 70s mercerized wool and conductive fiber. The yarn count is 36Nm/3, 48Nm/3, 54Nm/3, and the production method is adopted. Made into wool flame retardant fabric. The fabric is made of flame retardant and excellent electrical conductivity; the fabric can be machine washed, the physical indexes are stable, and the anti-pilling effect is good; the fabric has rich hair feel and excellent skin-friendly properties, and the appearance of the fabric is clear and full, and the hand feels fluffy.

Example 10: Silicon-nitrogen flame-retardant viscose fiber blended with mercerized wool and conductive fiber in a ratio of 20:79.2:0.8

Using a circular knitting machine, 2D×76mm silicon-nitrogen flame retardant viscose fiber and 70s wire Light wool and conductive fibers are blended. The yarn counts are 36Nm/3, 48Nm/3, and 54Nm/3. The wool flame retardant fabric is made by the production method in the manual. The fabric is made of flame retardant and excellent electrical conductivity; the fabric can be machine washed, the physical indexes are stable, and the anti-pilling effect is good; the fabric has rich hair feel, good skin-friendly performance, softness, and the appearance of the fabric is clear and full, and the hand feels fluffy. .

Example 11: Silicone-nitrogen flame retardant viscose fiber and aramid 35:65 ratio blended flame retardant fabric

A 2D×51mm silicon-nitrogen flame retardant viscose fiber was blended with aramid 1313, and 10 flames, twill, and a flame retardant fabric weighing 250 g/m ² were obtained by the above method. On the basis of the permanent flame retardant and high strength of aramid fiber, it can increase the wearing comfort, high tearing strength and high wear resistance. It can be used as special fireproof and protective clothing fabrics.

Example 12: Silicone-nitrogen flame retardant viscose fiber and aramid 65:35 ratio blended flame retardant fabric

The 2D×51mm silicon-nitrogen flame retardant viscose fiber was blended with aramid 1313, and 16 yarns, twill, and 168 g/m ² flame retardant fabric were prepared by the above method. The fabric can meet the requirements of high flame retardant performance and comfortable wearing at the same time, and can be used as a garment fabric that needs flame retardant and fireproof requirements and can be worn by the body.

Example 13: Silicone-nitrogen flame retardant viscose fiber and polysulfonamide 20:80 ratio blended flame retardant fabric

A 2D×51mm silicon-nitrogen flame retardant viscose fiber was blended with a polysulfonamide. Using the above production method, 10 yarns, twill, and a flame retardant fabric weighing 250 g/m ² were obtained. It can enhance the wearing comfort based on the permanent flame retardant and high strength of the polysulfonamide, and can be used as special personal protection.

Example 14: Silicone-nitrogen flame retardant viscose fiber and polysulfonamide 50:50 ratio blended flame retardant fabric

The blending of 1.5D×38mm silicon-nitrogen flame retardant viscose fiber and polysulfonamide was carried out, and the above production method was used to make 16 yarns, plain cloth and 168g/m ² flame retardant fabric. The flame-retardant fabric is harmless to the human body and has a higher degree of comfort, and can be used as a bedding area for underwear and underwear that needs to be worn.

Example 15: Silicone-nitrogen flame retardant viscose fiber and polysulfonamide 35:65 ratio blended flame retardant fabric

A 2D×51mm silicon-nitrogen flame-retardant viscose fiber was blended with a polysulfonamide, and the above production method was used to make 15 yarns, twill, and a flame retardant fabric weighing 200 g/m ² . Compared with the silicon-nitrogen flame-retardant viscose fiber, the blended fiber and the product thereof have lower smoke generation and higher strength, so that the wearer has higher wear resistance and can be used in aeronautical, marine and land transportation vehicles. Decoration.

Those skilled in the art can understand that the various method steps listed in the above embodiments are only for the purpose of illustrating the invention and are not intended to limit the same. Therefore, these steps are not necessarily in order and are not indispensable. The invention is only limited by the specific claims.

Claims (15)

1. Flame-retardant spun yarn, which is composed of organosilicon nitrogen flame retardant viscose staple fiber and one selected from the group consisting of polyimide, flame retardant acrylic fiber, flame retardant polyester, wool, conductive fiber, aramid 1313 and polysulfonamide Or a variety of fiber blends; wherein the silicone nitrogen flame retardant viscose staple fiber contains cellulose and a silicon nitride flame retardant.
2. The flame-retardant spun yarn according to claim 1, which is prepared by blending silicone-silicon flame-retardant viscose staple fibers and polyimide fibers, wherein the ratio of silicone-silicon flame-retardant viscose staple fibers to polyimide is It is between 95:5 and 50:50.
3. The flame-retardant spun yarn according to claim 1, which is prepared by blending silicone-silicon flame-retardant viscose staple fiber and flame-retardant acrylic fiber, wherein the weight ratio of the silicone-silicon flame-retardant viscose staple fiber to the flame-retardant acrylic fiber is 20: Between 80 and 65:35.
4. The flame-retardant spun yarn according to claim 1, which is made of a silicone-silicon flame-retardant viscose staple fiber and a flame-retardant polyester blend, wherein the weight ratio of the organosilicon-nitrogen flame-retardant viscose staple fiber to the flame-retardant polyester is 20: Between 80 and 65:35.
5. The flame-retardant spun yarn according to claim 1, which is prepared by blending silicone-silicon flame-retardant viscose staple fibers, wool and conductive fibers, wherein the silicone-silicon flame-retardant viscose staple fibers are 10-50 parts by weight. The parts by weight of the wool are 50-90, and the parts by weight of the conductive fibers are 0.5-1.
6. The flame-retardant spun yarn according to claim 1, which is prepared by blending silicone-silicon flame-retardant viscose staple fiber and aramid 1313, wherein the weight ratio of the silicone-silicon flame-retardant viscose staple fiber to the aramid 1313 is 20: Between 80 and 80:20.
7. The flame-retardant spun yarn according to claim 1, which is prepared by blending silicone-silicon flame-retardant viscose staple fiber and polysulfonamide, wherein the weight ratio of the organosilicon-nitrogen flame-retardant viscose staple fiber to the polysulfonate is 20: Between 80 and 50:50.
8. The flame-retardant spun yarn according to claim 1, wherein the silicone-nitrogen flame-retardant viscose staple fiber contains 60-80% by weight of cellulose and 10-30% by weight of a silicon-nitrogen flame retardant, the flame retardant It is a silica nitrogen compound.
9. The flame-resistant spun yarn according to claim 1, wherein the silicone nitrogen flame-retardant viscose staple fiber further contains 1.5 to 2.5% by weight of a cationic crosslinking agent, and the cationic crosslinking agent has an ionic form of Ti ⁴⁺ , RN ³⁺ , Al ³⁺ .
10. A flame-resistant spun yarn according to claim 1, wherein said cellulose is polymerized The degree is 650 ~ 750.
11. The flame-resistant spun yarn according to claim 1, wherein the staple fiber has a length of 38 to 120 mm.
12. A method for preparing a flame-retardant spun yarn according to any one of claims 1-11, comprising:

    Providing a flame retardant viscose staple fiber comprising the steps of:

    Making cellulose into a viscose collagen solution;

    The silicon nitrogen flame retardant is formulated into a flame retardant liquid;

    Spinning the flame retardant liquid immediately after mixing with the spinning viscous collagen solution;

    Cutting the spun fiber into short fibers of a predetermined length;

    Curing and desulfurizing the short fibers by using a cationic crosslinking agent to obtain flame retardant viscose staple fibers having stable flame retardancy;

    The flame-retardant viscose staple fiber is blended with one or more fibers selected from the group consisting of polyimide, flame-retardant acrylic, flame-retardant polyester, wool, conductive fiber, aramid 1313, and polysulfonamide to obtain a predetermined ratio. Flame retardant spun yarn.
13. The preparation method according to claim 12, wherein the blending comprises:

    The cleaning step, the carding step, the drawing step, the roving step, and the spinning step are performed.
14. The preparation method according to claim 13,

    In the cleaning step: the comprehensive beater speed is 750r/min, the lap speed of the lap is 11r/min, the dry weight of the lap is 380g/m, and the length is 30.6m;

    In the carding step: the speed of the cylinder is 300r/min, the speed of the doffer is 28r/min, the speed of the licking roller is 700r/min; the dust removing knife is 6mm above the horizontal plane of the frame, the installation angle is 95°; the distance between the dust removing knife and the licking roller 0.36mm, the distance between the licker and the cotton board is 0.38mm, and the four-point spacing between the cylinder and the cover is 0.28mm, 0.25mm, 0.25mm, 0.28mm respectively; the dry weight of the raw strip is 16.78g/5m , the short-lived rate is 4.20%;

    In the step of drawing; multiple draws, tight pressure and 5-6m/min;

    In the roving step: dry quantitative 3.35g/5m, roller center distance 42mm × 55mm × 67mm, rear zone draft 1.16 times, front roller speed 195r / min, 捻 coefficient 68;

    In the spinning step: the center distance of the roller is 43×58, the rear zone is 1.165 times, the twist factor is 335, and the front roller speed is 205 r/min.
15. A method of weaving a fabric, comprising:

    Providing a flame-resistant spun yarn prepared by the method of claim 12;

    The following treatments are applied to the flame retardant spun yarn:

    High temperature vacuum steaming treatment, wherein the degree of vacuum is -0.08 MPa, the temperature is 95-115 ° C, and the treatment time is about 2 hours;

    Warping treatment: warping pressure is 0.4MPa, warping speed is 400m/min;

    Sizing treatment: the slurry comprises 50 parts by weight of low-viscosity phosphate starch, 12.5 parts of PVA-1799 and 6 parts of acrylic slurry, wherein the slurry has a solid content of 5%, an unpacking viscosity of 11 s, and a slurry viscosity of 5 s;

    Wear treatment: the comprehensive method is {(1, 5), (3, 2), (6, 4)} × 12, (9, 5, 11), (12, 9, 5), (11, 12 , 9), (5, 11, 12), {(1, 7), (3, 2), (8, 4)} × 16, {(1, 5), (3, 2), (6, 4)}×4.