Resin Blend Layer Separation Structure for Weather Resistance
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Solution Overview
Problem
Conventional plastic resins used in applications like vehicle components and toys face issues with weather resistance and impact resistance due to degradation from oxygen, ozone, and sunlight, requiring additional coating or plating processes that increase costs and produce hazardous materials.
Innovation Solution
A resin blend comprising a first resin and a second resin with a hydrophobic functional group, where the second resin has a surface energy difference of 0.1 to 20 mN/m from the first resin, forming a layer separation structure to enhance mechanical and surface properties without the need for coating or plating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coating or plating process is applied to improve weather resistance and surface hardness, then surface properties are improved, but production cost increases and hazardous materials are produced
Solution Approach 1:
The patent combines multiple functions (weather resistance, surface hardness, impact resistance) into a single resin blend formulation, eliminating the need for separate coating or plating processes. The resin blend integrates hydrophobic functional groups and inorganic particles within the base resin matrix, achieving all required properties in one material system rather than through multiple sequential processes.
Solution Approach 2:
The patent creates a composite resin blend consisting of a base resin, hydrophobic functional groups (such as silane or fluorocarbon groups), and inorganic particles. This composite structure provides weather resistance through hydrophobic groups, surface hardness through inorganic particles, and maintains processability through the resin matrix, replacing the need for separate coating materials.
2Strength
If inorganic particles are added to improve wear resistance and rigidity, then mechanical properties are improved, but impact resistance and glossiness are reduced
Solution Approach 1:
The patent applies local quality by concentrating inorganic particles and hydrophobic functional groups primarily at the surface region of the resin molding article. The core interior maintains the base resin's toughness and impact resistance, while the surface layer provides enhanced wear resistance, scratch resistance, and weather resistance. This gradient structure allows different regions to have optimized properties for their specific functions.
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 resin blend improves mechanical and surface properties, reduces production costs, and shortens processing time by forming a layer separation structure that enhances surface hardness and scratch resistance without additional surface treatments.
Implementation Method 1
the second resin having a surface energy difference of 0.1 to 20 mN/m from the first resin at 25° C.
Implementation Method 2
the second resin having a hydrophobic functional group represented by the following Chemical Formula 1 in a side chain
Data Source
AI summary
Provided is a resin blend including a first resin and a second resin, the second resin having a hydrophobic functional group in a side chain and having a surface energy difference of 0.1 to 20 mN/m from the first resin at 25° C., wherein the resin blend is capable of forming a layer separation structure. Also, provided are a pellet, a method for preparing the same, and a resin molding article having a specific layer separation structure. The resin blend may not only improve mechanical properties and surface hardness of the molding article but also shorten process time, increase productivity and reduce production cost by omitting an additional surface coating step.