Polyimide Composite Wadding for Windproof Flame-Retardant Insulation

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Solution Overview

Problem

Existing wadding products face issues with complex production processes, poor fiber mixing, and structural layers easily falling off, leading to inadequate flame-retardant and windproof performance.

Innovation Solution

A flame-retardant and windproof wadding is produced using polyimide fiber as a base material, interlaced with polyester fibers, and compounded in a spinning stage with a specialized spinning equipment featuring a spinneret and grid mixing structure to enhance fiber compounding and adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a multi-layer structure is adopted to achieve fluffy, porous and lightweight effect, then the thermal insulation performance is improved, but the production process becomes complex and the efficiency decreases

Engineering Contradiction:

Improvethermal insulation performanceVSAvoidproduction efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent combines multiple fiber types (polyester fibers, polyacrylonitrile fibers, and inorganic flame-retardant fibers) into a single-layer composite structure during the spinning process. This merging approach achieves the thermal insulation performance of multi-layer structures while simplifying the production process and improving efficiency, as the fibers are intertwined at the staple level rather than requiring separate layer extrusion and stacking

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a multi-layer structure is adopted to achieve fluffy, porous and lightweight effect, then the thermal insulation performance is improved, but the production process complexity increases

Engineering Contradiction:

Improvethermal insulation performanceVSAvoidproduction process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple fiber types into a single composite fiber bundle during spinning, eliminating the need for complex multi-layer extrusion equipment and stacking processes. The composite structure is formed in one continuous spinning operation, significantly reducing production process complexity while maintaining thermal insulation performance

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a composite fiber material combining polyester, polyacrylonitrile, and inorganic flame-retardant fibers with different properties. This composite material approach allows a single-layer structure to achieve the functional benefits of multiple layers (insulation, flame resistance, windproofing) without requiring complex multi-layer production equipment

Inventive Principle:

Principle #40Composite materials

3Reliability

If a multi-layer structure is adopted to achieve fluffy, porous and lightweight effect, then the thermal insulation performance is improved, but the likelihood of fiber falling off increases

Engineering Contradiction:

Improvethermal insulation performanceVSAvoidstructural integrity

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent merges multiple fiber types into a tightly intertwined composite structure during spinning, where fibers are interlaced at the staple level. This creates a unified single-layer structure with high structural integrity, eliminating the layer separation and fiber falling off issues inherent in multi-layer constructions

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The composite fiber material combines fibers with different physical properties (polyester for strength, polyacrylonitrile for fluffiness, inorganic fibers for flame resistance). The diverse fiber properties create a synergistic effect where the structure is more stable and resistant to fiber loss than homogeneous or layered structures

Inventive Principle:

Principle #40Composite materials

4Reliability

If polyimide fiber is used as base material and interlaced with polyester fiber in spinning stage, then the flame-retardant and windproof effect is improved, but the manufacturing complexity increases

Engineering Contradiction:

Improveflame-retardant effectVSAvoidmanufacturing simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent uses polyimide fiber as a base material and combines it with polyester fibers and other functional fibers to create a composite material with enhanced flame-retardant properties. The composite structure achieves superior flame resistance while maintaining ease of manufacture through a single-step spinning process that integrates all fiber components

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12630946B2Flame-retardant and windproof wadding and preparation method thereof

Publication Date: 2026.05.19 YANG YAN

AI summary

The invention provides a flame-retardant and windproof wadding, which is obtained by using a polymer containing an imide ring as a base material and interlacing and compounding it with at least one polyester fiber in a spinning stage; and a preparation method and special equipment thereof. The characteristics and advantages of the present invention are as follows: the flame-retardant and windproof wadding provided by the present invention uses polyimide fiber as the base material and various fibers; through the adjustment of the preparation method and special equipment, the improvement of the windproof, thermal insulation and flame-retardant effect of the wadding is finally realized; and the same time, various fibers in the wadding are highly mixed, forming a homogeneous, moderately cross-linked and fluffy mixed structure, which can greatly reduce the probability of falling off of the layered structure in the traditional process.