Translucent Resin Member with SiOX Interlayer for Alkali Resistance
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Solution Overview
Problem
Translucent resin members, particularly polycarbonate, face issues with weather resistance, abrasion resistance, productivity, and alkali resistance due to surface damage and peeling of silicon dioxide layers when exposed to alkaline solutions.
Innovation Solution
A translucent resin member configuration featuring an acrylic hard coat layer, a SiOX layer formed by deposition, and a dense Si(1-Y)CYOX layer formed by plasma CVD, where the SiOX layer protects the acrylic hard coat layer from plasma damage and the Si(1-Y)CYOX layer minimizes alkaline solution transmission, enhancing alkali resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a silicon-based hard coat layer is formed by thermal curing on a PC substrate, then weather resistance and abrasion resistance are improved, but productivity decreases and manufacturing costs increase due to long curing time (30-60 minutes)
Solution Approach 1:
The patent changes the curing mechanism from thermal curing (requiring 30-60 minutes at elevated temperatures) to UV light curing (completing in seconds to minutes at room temperature). This parameter change in the curing process enables rapid production while maintaining the protective function of the hard coat layer, thereby resolving the contradiction between weather resistance and productivity
Solution Approach 2:
The patent replaces the thermal curing mechanism with a photochemical UV curing mechanism. Instead of using heat and time for curing, UV light initiates rapid polymerization of the acrylic-based hard coat material, substituting a thermal process with a photochemical one to achieve both high reliability and productivity
2Productivity
If a SiO2 layer is formed by plasma CVD directly on an acrylic hard coat layer, then productivity is improved, but alkali resistance deteriorates due to plasma damage to the acrylic layer and subsequent peeling when exposed to alkaline solutions
Solution Approach 1:
The patent introduces a SiOX layer as an intermediary between the acrylic hard coat layer and the SiO2 layer. This intermediate layer acts as a protective barrier that prevents direct plasma contact with the acrylic layer during CVD processing, eliminating plasma-induced damage and subsequent alkali resistance problems while maintaining the benefits of plasma CVD formation
Solution Approach 2:
The patent applies a SiOX layer beforehand to cushion and protect the acrylic hard coat layer from the harmful effects of plasma exposure during subsequent SiO2 layer formation. This preliminary protective measure prevents the acrylic layer from being damaged by plasma, thereby preventing future peeling issues when exposed to alkaline environments
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 configuration significantly improves alkali resistance, weather resistance, abrasion resistance, productivity, and thermal resistance while maintaining transparency and strength, as demonstrated by reduced peeling and surface damage in alkali resistance tests.
Implementation Method 1
a SiOX layer which is formed by deposition
Implementation Method 2
a Si(1-Y)CYOX layer (0
Implementation Method 3
the acrylic hard coat layer is UV-cured in the absence of oxygen
Data Source
AI summary
Provided is a translucent resin member including: an acrylic hard coat layer, a SiOX layer (1.2<X<2), and a Si(1-Y)CYOX layer (0<Y<1, 1.2<X<2) sequentially provided on a polycarbonate (PC) substrate. The acrylic hard coat layer may be UV-cured in the absence of oxygen. The SiOX layer may be formed by deposition. The Si(1-Y)CYOX layer may be formed by plasma chemical vapor deposition (CVD).