High flame-retardant rag felt and its production process

By introducing chloroacetic acid treatment and amino nano-silica modification into nylon waste fibers, combined with chain extender, the problems of flammability and reduced mechanical properties of nylon waste felt were solved, and the production of waste felt with high flame retardancy and high strength was achieved.

CN119372841BActive Publication Date: 2026-09-04ANHUI JIELIANG NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202411277864.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-12
Publication Date
2026-09-04
Estimated Expiration
2044-09-12

AI Technical Summary

Technical Problem

In existing technologies, the flame retardant and mechanical properties of waste nylon felt decrease during recycling and processing, making it flammable and producing combustible gases, which makes it difficult to meet safety requirements.

Method used

Carboxyl-modified fibers are formed by introducing chloroacetic acid into nylon waste fibers. These fibers are then mixed with amino nano-silica and diethyl aluminum hypophosphite to form amide bonds and a carbon layer. Combined with a chain extender, the fiber strength and flame retardant properties are improved.

Benefits of technology

It improves the flame retardant and mechanical properties of waste textile felt, reduces the release of molten droplets and combustible gases, enhances tear resistance, forms a dense heat insulation layer, and terminates the combustion chain reaction.

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Abstract

The application discloses a kind of high flame-retardant waste spinning blanket and production process, belong to waste spinning blanket material technical field, including the following steps: S1, after being recycled, sorting, disinfecting, the nylon waste spinning is again opened and carded, and pretreated fiber is obtained;S2, pretreated fiber is immersed in isopropyl alcohol solution, then 10wt% concentration chloroacetic acid solution is added, and is stirred and reacted at 50-60 DEG C for 1-1.5h, then after deionized water washing, drying, modified fiber is obtained;S3, modified fiber, modified chain extender, amino nano silicon dioxide, diethyl hypophosphite aluminum are mixed uniformly, and are added to melt spinning machine to spin, after combing, paving into net, again after needle punching processing, hot-pressing treatment, high flame-retardant waste spinning blanket is obtained.The application uses nylon waste spinning as base material, and under the synergistic effect of modified chain extender, amino nano silicon dioxide and flame retardant, the tear resistance and flame retardant performance of waste spinning blanket are improved.
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