Acrylic Resin Laminate with T2H-Controlled Core for Low-Temperature Impact
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Solution Overview
Problem
Existing resin window materials face challenges in achieving sufficient impact resistance while maintaining transparency, which is crucial for applications like automobile glazing, where high physical performance is required.
Innovation Solution
A laminate structure comprising a first acrylic resin layer, a thermoplastic resin layer with a spin-spin relaxation time of 0.03 ms or longer, and a second acrylic resin layer, with specific thickness ratios and compositions, is developed to enhance impact resistance, particularly at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a resin with high transparency is used for a resin window material, then transparency is improved, but impact resistance becomes insufficient
Solution Approach 1:
The invention uses a composite structure consisting of a transparent resin layer and a thermoplastic resin layer with specific T2H characteristics. The transparent resin provides optical clarity while the thermoplastic resin layer with T2H ≥ 0.03 ms provides impact resistance, creating a composite material that achieves both transparency and high impact resistance simultaneously.
Solution Approach 2:
The invention changes the physical parameter T2H (spin-spin relaxation time) of the thermoplastic resin to be 0.03 ms or longer, which correlates with enhanced impact resistance. By selecting and controlling this specific parameter of the thermoplastic resin, the invention achieves improved impact resistance while maintaining the transparency of the overall laminate.
2Strength
If the thickness of the thermoplastic resin layer is increased to improve impact resistance, then impact resistance is improved, but the weight of the laminate increases
Solution Approach 1:
Instead of simply increasing thickness, the invention changes the material parameter T2H of the thermoplastic resin to be 0.03 ms or longer. This parameter change enables achieving high impact resistance with a thinner layer (0.05-2.5 mm), thereby reducing overall weight while maintaining required strength performance.
3Strength
If a laminate structure with multiple layers is used to improve impact resistance, then impact resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The invention specifies a clear parameter threshold (T2H ≥ 0.03 ms) for the thermoplastic resin, which simplifies material selection and quality control. This parameter-based approach provides clear manufacturing guidelines and acceptance criteria, reducing complexity in production and inspection processes despite the multi-layer structure.
Data Source
AI summary
Provided are an acrylic resin layer laminate having excellent impact resistance and a manufacturing method of the same. The laminate includes a first acrylic resin layer, a thermoplastic resin layer, and a second acrylic resin layer in this order, in which the thermoplastic resin layer contains 71% or more of a component having a spin-spin relaxation time T2H in pulse NMR measurement of 0.03 ms or longer. The manufacturing method of the laminate includes: discharging, from a die, a molten resin laminate containing at least a melt of a resin composition (1) containing a (meth)acrylic resin, a melt of a resin composition containing a thermoplastic resin, and a melt of a resin composition (2) containing a (meth)acrylic resin; and cooling the discharged molten resin laminate to obtain a laminate.