Vinyl Chloride Fiber Composition for Fine, Thermally Stable Spinning
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Solution Overview
Problem
Vinyl chloride-based fibers produced through melt-spinning face challenges with reduced fineness and deteriorating thermal resistance when increasing plasticizer content for improved spinnability.
Innovation Solution
A vinyl chloride-based fiber composition comprising a copolymer of vinyl chloride and a macromonomer, combined with another vinyl chloride-based resin, enhances spinnability and thermal resistance by improving flowability during melt-spinning, achieving a fineness of 30 dtex or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the blend amount of plasticizer is increased to improve spinnability, then the fineness of vinyl chloride-based fibers can be reduced, but the thermal resistance deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters of the resin by incorporating a macromonomer with specific molecular weight (1000-10000) and structure (ethylene-unts with double bonds in main chain). This parameter change improves melt flowability and spinnability without requiring excessive plasticizer, thereby maintaining thermal resistance.
Solution Approach 2:
The invention creates a composite resin system by blending vinyl chloride-based resin A (copolymer with macromonomer) and vinyl chloride-based resin B (other vinyl chloride resin). This composite approach combines the flowability benefits of the macromonomer-containing resin with the thermal stability of the other vinyl chloride resin, resolving the contradiction between spinnability and thermal resistance.
2Length of moving object
If the fineness of vinyl chloride-based fibers is reduced for clothing applications, then the fibers become more suitable for apparel, but the spinnability deteriorates
Solution Approach 1:
The invention modifies the resin parameters by using a macromonomer with controlled molecular weight (1000-10000) that enhances melt flow characteristics. This allows the production of fine fibers (30 dtex or less) with improved spinnability, as the macromonomer facilitates better polymer chain mobility during the spinning process.
Solution Approach 2:
The invention introduces local quality changes by incorporating a specific type of macromonomer (with ethylene-unts and double bonds in main chain) that locally enhances flowability at the molecular level. This localized modification enables fine fiber production without compromising overall spinnability.
3Ease of manufacture
If vinyl chloride-based resin is processed through melt-spinning to avoid solvent removal steps, then production cost is reduced, but the spinnability and thermal resistance are compromised
Solution Approach 1:
The invention changes the resin composition parameters to enable successful melt-spinning. By incorporating macromonomer (1000-10000 molecular weight) and controlling the blend ratio of resin A and resin B, the invention achieves adequate melt flowability and thermal stability, making melt-spinning a viable and cost-effective process.
Solution Approach 2:
The invention develops a composite resin formulation combining vinyl chloride-based resin A (with macromonomer for flowability) and vinyl chloride-based resin B (for thermal stability). This composite material enables melt-spinning processing while maintaining both spinnability and thermal resistance, avoiding the need for solvent removal steps and reducing production costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Stable production of vinyl chloride-based fibers with favorable thermal resistance and reduced fineness is achieved through the use of a specific resin composition, improving spinning stability and maintaining thermal properties.
Implementation Method 1
a step of obtaining undrawn yarn by melt-spinning a vinyl chloride-based resin composition
Data Source
AI summary
The present invention relates to a vinyl chloride-based fiber that includes a vinyl chloride-based resin composition. The vinyl chloride-based resin composition includes a vinyl chloride-based resin A and a vinyl chloride-based resin B. The vinyl chloride-based resin A is a copolymer of vinyl chloride and a macromonomer and the vinyl chloride-based resin B is a vinyl chloride-based resin other than the vinyl chloride-based resin A. A method for producing the vinyl chloride-based fiber includes a step of obtaining undrawn yarn by melt-spinning the vinyl chloride-based resin composition.