Fiber size composition, fiber size dispersion, fiber size solution, fiber bundle, fiber product, and composite material
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Solution Overview
Problem
Existing fiber sizing agents fail to adequately penetrate between fibers in fiber bundles, particularly when the bundles contain many fibers, leading to insufficient suppression of fluffing and end breakage.
Innovation Solution
A fiber sizing agent composition comprising an aliphatic alcohol alkylene oxide adduct and a compound such as a polyester, polyurethane, epoxy group-containing compound, or polyether, which enhances penetration and bonding between fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sizing solution is applied to fiber bundles containing many fibers, then the sizing process can be completed, but the sizing solution does not sufficiently penetrate between fibers, resulting in insufficient suppression of fluffing and end breakage
Solution Approach 1:
The patent changes the chemical parameters of the sizing agent by using an aliphatic alcohol alkylene oxide adduct with specific molecular weight (200-500) and specific structural characteristics (R1 is C8-C11 aliphatic hydrocarbon group with three or more methyl groups). These parameter changes enable the sizing agent to sufficiently penetrate between fibers in dense fiber bundles, resolving the penetration issue while maintaining reliability in suppressing fluffing and end breakage
Solution Approach 2:
The patent creates a composite sizing agent system by combining the aliphatic alcohol alkylene oxide adduct (component A) with at least one compound from specific groups (polyester, polyurethane, epoxy group-containing compound, (meth)acryloyl group-containing compound, or polyether compound). This composite approach enhances both penetration capability and the effectiveness in suppressing fluffing and end breakage
Data Source
Figure 1
AI summary
The present invention aims to provide a fiber sizing agent composition capable of suppressing fluffing of fiber bundles. The fiber sizing agent composition of the present invention contains an aliphatic alcohol alkylene oxide adduct (A) represented by the following formula (1), and a compound (B), wherein the compound (B) is at least one selected from the group consisting of a polyester (B1), a polyurethane (B2), an epoxy group-containing compound (B3), a (meth)acryloyl group-containing compound (B4), and a polyether compound (B5) other than the aliphatic alcohol alkylene oxide adduct (A): R1O(AO)mH (1) in the formula (1), R1 is a C8-C11 aliphatic hydrocarbon group having three or more methyl groups; AO is a C2-C4 alkyleneoxy group; and m represents the number average number of moles of alkylene oxide added and is 3 to 10.