Crystalline Polypropylene Decorative Sheet Transparency Scratch Resistance
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Solution Overview
Problem
Decorative sheets with olefin-based resins lack high transparency and excellent surface scratch resistance, which are essential design properties.
Innovation Solution
A decorative sheet with a transparent resin layer containing crystalline polypropylene resin, where the peak area ratio from X-ray diffraction and peak intensity ratio from Fourier infrared spectrometry are optimized to achieve high transparency and scratch resistance, with the addition of a nano-sized nucleating agent vesicle for enhanced crystallization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a polyvinyl chloride decorative sheet is used, then good surface scratch resistance is achieved, but transparency and design properties are compromised
Solution Approach 1:
The invention changes the chemical composition parameters by using olefin-based resins (polyethylene, polypropylene, polybutene-1) instead of polyvinyl chloride, and controls the crystallinity parameters (peak area ratio x≥0.4 from X-ray diffraction) to achieve both transparency and scratch resistance simultaneously
Solution Approach 2:
The invention creates a composite structure with multiple resin layers including a transparent resin layer containing olefin-based resin with specific crystallinity, combining the advantages of different materials to achieve both transparency and mechanical durability
2Illumination intensity
If an olefin-based resin decorative sheet is used, then transparency is improved, but surface scratch resistance deteriorates
Solution Approach 1:
The invention optimizes the crystallinity parameters of the olefin-based resin by controlling the peak area ratio x≥0.4 (from X-ray diffraction) and peak intensity ratio y≥0.65 (from Fourier infrared spectrometry), transforming the resin properties to achieve both transparency and scratch resistance
Solution Approach 2:
The invention creates different functional layers with specific properties: a transparent resin layer with controlled crystallinity for transparency and scratch resistance, and a pattern layer for design, allowing each layer to optimize its local function
3Illumination intensity
If the resin layer is made transparent, then design properties are improved, but surface durability and scratch resistance worsen
Solution Approach 1:
The invention changes the physical and chemical parameters of the resin by controlling crystallinity (peak area ratio x≥0.4, peak intensity ratio y≥0.65) and molecular structure (olefin-based resin with specific composition), achieving simultaneous improvement in transparency and surface durability
Solution Approach 2:
Instead of adding opaque materials to improve scratch resistance, the invention inverts the approach by optimizing the crystalline structure of transparent olefin-based resin itself to provide both transparency and enhanced scratch resistance
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 solution provides a decorative sheet with high transparency and excellent scratch resistance, preventing whitening during bending and maintaining design properties, while ensuring uniform resin hardening and improved dispersibility of the nucleating agent.
Implementation Method 1
a transparent resin layer containing a crystalline polypropylene resin as the main component
Implementation Method 2
the addition of a nano-sized nucleating agent vesicle for enhanced crystallization
Implementation Method 3
a value of a peak area ratio x represented by the following expression (1) of the transparent resin layer is x≥0.4. Herein, S040, S130 and Sam in the following expression (1) are peak areas determined from an X-ray diffraction spectrum obtained by measuring the transparent resin layer by an X-ray diffractometer
Implementation Method 4
a value of a peak intensity ratio y represented by the following expression (2) of the transparent resin layer is y≥0.65. Herein, I997, I938, and I973 in the following expression (2) are peak intensity values calculated from the absorption spectrum obtained by the Fourier infrared spectrometry of the transparent resin layer
Data Source
AI summary
To provide a decorative sheet including a transparent resin layer having high transparency and excellent surface scratch resistance from the viewpoint of the design properties and a transparent resin sheet. A decorative sheet (1) according to one aspect of the present invention has a transparent resin layer (4) containing a crystalline polypropylene resin as the main component, in which a value of a peak area ratio x represented by the following expression (1) of the transparent resin layer (4) is x≥0.4. Herein, S040, S130, and Sam in the following expression (1) are peak areas determined from an X-ray diffraction spectrum obtained by measuring the transparent resin layer with an X-ray diffractometer, S040 is the peak area from the Miller index (040) of polypropylene α crystals, S130 is the peak area from the Miller index (130) of the polypropylene α crystals, and Sam is the peak area of an amorphous material.Peakarearatiox=(S040+S130)(Sam)(1)