Fiber sizing agent composition, fiber sizing agent dispersion, fiber sizing agent solution, method for producing fiber bundles, composite intermediate and fiber-reinforced composite material
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Solution Overview
Problem
Existing fiber sizing agents fail to impart sufficient sizing properties and tensile strength to composite materials, and those that attempt to suppress fluffing of fiber bundles are ineffective.
Innovation Solution
A fiber sizing agent composition comprising a polyester resin with specific HLB and viscosity ranges, combined with reactive compounds like blocked isocyanates, tertiary amines, or quaternary ammonium salts, applied in specific weight ratios to enhance sizing properties and tensile strength while minimizing fluffing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing fiber sizing agents are used, then fiber bundles can be processed, but sufficient sizing properties and tensile strength cannot be imparted to the composite materials
Solution Approach 1:
The invention uses a composite sizing agent system combining polyester resin (A) with specific HLB and viscosity characteristics and reactive compound (B) from a defined group, creating a multi-component formulation that simultaneously achieves adequate sizing properties and high tensile strength in the resulting composite materials
Solution Approach 2:
The invention specifies precise parameter ranges for the polyester resin including HLB value and viscosity at 30°C, along with defined weight ratios of (A)/(B) from 99.9/0.1 to 10/90, optimizing the physical and chemical properties to achieve both sufficient sizing properties and enhanced tensile strength
2Strength
If sizing agents containing blocked isocyanate are used, then some strength improvement is achieved, but fluffing of fiber bundles cannot be suppressed
Solution Approach 1:
The invention optimizes the viscosity parameter of the polyester resin at 30°C to fall within 10 to 1,000,000 Pa·s and controls the weight ratio of polyester resin to reactive compound within 99.9/0.1 to 10/90, achieving a balance that suppresses fluffing while maintaining strength improvement
3Strength
If epoxy compounds or rubber latex containing epoxy groups are used in sizing agents, then some strength enhancement is achieved, but sufficient sizing properties cannot be imparted
Solution Approach 1:
The invention creates a composite sizing system where polyester resin (A) with specifically controlled HLB and viscosity parameters works synergistically with reactive compound (B), achieving both adequate sizing properties and enhanced composite material strength that neither component could achieve alone
Solution Approach 2:
By controlling the HLB value and viscosity of the polyester resin within specified ranges and optimizing the weight ratio of (A)/(B), the invention achieves optimal balance between sizing properties and strength enhancement
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
The proposed composition achieves excellent emulsion stability, improved sizing properties, and enhanced tensile strength in fiber-reinforced composite materials, effectively suppressing fluffing and improving the overall performance of the materials.
Implementation Method 1
The fiber sizing agent composition of the present invention is excellent in emulsion stability
Implementation Method 2
a reactive compound (B), wherein the polyester resin (A) is a polyester resin having an HLB of 4 to 18 and a viscosity at 30° C. of 10 to 1,000,000 Pa·s; the reactive compound (B) is at least one reactive compound selected from the group consisting of blocked isocyanates, tertiary amines, tertiary amine salts, quaternary ammonium salts, quaternary phosphonium salts, and phosphine compounds
Data Source
AI summary
The present invention provides a fiber sizing agent composition containing a polyester resin (A) and a reactive compound (B), wherein the polyester resin (A) is a polyester resin having an HLB of 4 to 18 and a viscosity at 30° C. of 10 to 1,000,000 Pa·s, the reactive compound (B) is at least one reactive compound selected from the group consisting of blocked isocyanates, tertiary amines, tertiary amine salts, quaternary ammonium salts, quaternary phosphonium salts, and phosphine compounds, and the weight ratio of the polyester resin (A) to the reactive compound (B) [(A)/(B)] in the fiber sizing agent composition is 99.9/0.1 to 10/90.