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CN-122013390-A - High-toughness flame-retardant yarn and preparation method and application thereof

CN122013390ACN 122013390 ACN122013390 ACN 122013390ACN-122013390-A

Abstract

The invention provides a high-toughness flame-retardant yarn and a preparation method and application thereof, and belongs to the technical field of textile materials. The invention uses high-strength filament yarn as core yarn and flame-retardant spun yarn as skin layer to prepare skin core yarn, after pre-cleaning, the skin core yarn is soaked and rolled in water-based flame-retardant finishing liquid containing chitosan quaternary ammonium salt derivative, citric acid polyol ester and organic silicon softening agent, and then the finished yarn is prepared through pre-drying and heat setting. The invention realizes the balance of flame retardance and high toughness through the skin-core structural design and the process adaptation of the bio-based flame retardant finishing liquid, has excellent flame retardance after washing, small yarn color difference, good air permeability, no formaldehyde and low smoke density grade, and can meet the severe standard of vehicle interior trim cloth. The process does not need special equipment, does not release toxic solvents, has low production cost, and the prepared yarn can be widely applied to the fields of flame-retardant curtains, sofa fabrics, curtains, traffic interior trim fabrics and the like, and has good industrialization prospect.

Inventors

  • HAO YONGGANG
  • XU ZHENJIAN
  • SUN BICHENG
  • ZHANG YONG

Assignees

  • 山东环升新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (9)

  1. 1. The preparation method of the high-toughness flame-retardant yarn is characterized by comprising the following steps of: step 1), mixing chitosan quaternary ammonium salt derivative aqueous solution, a cross-linking agent and a softening agent to obtain flame-retardant finishing liquid; Step 2), after carding and drawing, the flame-retardant spun yarn is coated by taking high-strength filaments as core yarns to obtain sheath-core yarns; And 3) pre-cleaning the sheath-core yarn, soaking the sheath-core yarn in the flame-retardant finishing liquid for two times, rolling the sheath-core yarn, sequentially pre-drying and heat setting, and naturally cooling to obtain the high-toughness flame-retardant yarn.
  2. 2. The method for preparing the high-toughness flame-retardant yarn according to claim 1, wherein in the step 1), the addition amount of the chitosan quaternary ammonium salt derivative is 5-10 parts by mass, the addition amount of the cross-linking agent is 2-5 parts by mass, the addition amount of the softening agent is 1-3 parts by mass, and the balance is water in the flame-retardant finishing liquid; the cross-linking agent is citric acid polyol ester, and the softening agent is an organosilicon softening agent; the solid content of the flame-retardant finishing liquid is 10-20wt%.
  3. 3. The method for preparing the high-toughness flame-retardant yarn according to claim 2, wherein in the step 1), the mixing is performed under the stirring condition, the stirring temperature is 25-30 ℃, the stirring time is 15-20 min, and the stirring rotating speed is 300-500 r/min.
  4. 4. The method for preparing a high-tenacity flame-retardant yarn according to claim 1 or 2, wherein in step 2), the high-strength filaments comprise aramid fibers or high-strength polyester fibers, and the linear density range is 100-500 d; the flame-retardant spun yarn comprises flame-retardant acrylic fibers or flame-retardant polyester staple fibers, wherein the fiber length of the flame-retardant spun yarn is 38-51 mm, and the fineness is 1.5-3.0D.
  5. 5. The method for preparing the high-toughness flame-retardant yarn according to claim 4, wherein in the step 2), the coating is a ring spinning or sirospun process, the coating rate is more than or equal to 85%, the twist is 600-900T/m, and the twist coefficient alpha is 120-140.
  6. 6. The method for preparing a high-tenacity flame-retardant yarn according to claim 1 or 5, wherein in the step 3), the time of each impregnation is 30-60 s in the two-by-two padding, and the padding residual rate after padding is 50-60%.
  7. 7. The method for producing a high tenacity flame retardant yarn of claim 6 wherein in step 3), the pre-bake temperature is 60 to 70 ℃ and the pre-bake time is 3 to 5 minutes; The temperature of heat setting is 120-150 ℃, and the time of heat setting is 2-4 min.
  8. 8. The high-tenacity flame-retardant yarn prepared by the preparation method of any one of claims 1 to 7.
  9. 9. The use of the high tenacity flame retardant yarn of claim 8 in the manufacture of flame retardant upholstery, wherein the flame retardant upholstery comprises flame retardant curtains, sofa fabric, draperies, and vehicle interior trim.

Description

High-toughness flame-retardant yarn and preparation method and application thereof Technical Field The invention relates to the technical field of textile materials, in particular to a high-toughness flame-retardant yarn and a preparation method and application thereof. Background The flame-retardant decorative cloth is used as a core textile material for public places such as hotels, markets, rail transit and the like and home scenes, flame-retardant safety is a basic performance requirement, and meanwhile, the use performances such as handfeel, air permeability, color attractiveness, durability and the like are also considered, and the industrialization requirements of the market on the flame-retardant decorative cloth with large scale, multiple varieties and low cost are increasingly improved. The flame retardant treatment for the flame retardant decorative cloth in the industry at present mainly comprises the steps of after-finishing the fabric, namely, firstly weaving the base fabric, and then realizing the flame retardant effect by dip-coating the flame retardant, wherein the process is simple and convenient to operate, and the initial flame retardant effect reaches the standard, but has a plurality of technical defects which are difficult to solve; secondly, most of the existing high-efficiency flame retardants are chemical synthesis type, the compatibility with dyes is poor, the coloring effect of the dyes is easy to influence, the color of cloth is darkish, the color fastness is reduced, part of the flame retardants also have inherent colors, the degree of freedom of the flame-retardant decorative cloth in terms of color collocation and pattern design is severely limited, and the aesthetic requirement of the decorative cloth is difficult to meet. In order to solve the defects of the after-finishing of the fabric, part of the technical proposal tries to add functional master batch or auxiliary agent into spinning raw materials, realizes the flame retardant property of the yarn through spinning integration, and simultaneously stacks multiple functions of high strength, antibiosis and the like. However, in order to realize high-performance superposition, a large amount of expensive flame-retardant and antibacterial functional master batches are often required to be added, so that the raw material cost is greatly increased, and the addition of the functional master batches and the spinning process are matched with specific high-temperature polymerization spinning equipment, so that the process is complex, the energy consumption is high, the production flexibility is poor, the product performance is difficult to adjust quickly according to the market demand, the productivity is limited to improve, and the large-scale and multi-variety production demands of flame-retardant decorative cloth markets cannot be adapted. Meanwhile, the existing flame-retardant fibers have inherent performance defects, most of high-efficiency flame-retardant fibers are large in brittleness and low in breaking strength, the produced yarns are poor in tear resistance, the yarns are easy to damage and fuzzing after being woven into cloth, if the consumption of the flame-retardant fibers is simply increased, the strength is improved, the problem of stiff hand feeling of the cloth is further aggravated, and the relationship among flame retardance, toughness and hand feeling is difficult to balance. In addition, most of the functional modified layers of the existing yarns are chemical synthesis type coatings, the crosslinking and bonding effects with fibers are poor, the colors of fiber bodies are easy to cover, and meanwhile, toxic solvents can be released in the preparation process of part of the coatings, so that the yarn is neither environment-friendly nor accords with the green production trend of textile materials. In summary, there is a need in the industry to provide a technology for preparing flame-retardant yarns, which combines flame-retardant safety, high toughness, aesthetic property and durability, and solves the problems of easy falling of flame retardant, poor hand feeling, limited color and the like in the traditional flame-retardant treatment process on the basis of reducing production cost, reducing energy consumption and improving production flexibility, and meanwhile, realizes efficient superposition of functions of flame retardance, high strength, antibiosis and the like so as to adapt to application requirements of flame-retardant decorative cloth in various scenes and promote technical upgrading of the flame-retardant decorative cloth industry. Disclosure of Invention The invention aims to provide a high-toughness flame-retardant yarn, and a preparation method and application thereof, which are used for solving the technical problems. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a preparation method of high-toughness flame-retar