Rubber Laminate Structure for Bonding Low-Polarity Elastomer Layers
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Solution Overview
Problem
It is challenging to bond olefin-type rubber, which is non-polar or has low polarity, with other materials, and rubber containing Group 15 elements, due to their inherent properties, which limits their integration in laminate structures.
Innovation Solution
A laminate structure is developed comprising an olefin-type rubber layer, an adhesive resin layer, and a layer containing Group 15 elements, where the adhesive resin specifically facilitates strong integration between these otherwise difficult-to-bond materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If olefin-type rubber and Group 15 element-containing rubber are directly bonded, then the bonding difficulty increases due to non-polar or low polarity properties, but using conventional adhesive layers adds complexity to the laminate structure
Solution Approach 1:
The patent employs a specifically designed adhesive resin layer as an intermediary between the olefin-type rubber layer and the Group 15 element-containing rubber layer. This adhesive resin contains functional groups that can chemically interact with both rubber types, bridging the polarity gap and enabling strong bonding without requiring complex multi-layer structures or special surface treatments.
2Reliability
If fluorine rubber is used to improve heat resistance and oil resistance, then performance increases, but cost increases due to expensive material
Solution Approach 1:
The patent creates a composite laminate structure where fluorine rubber is combined with other rubber materials (such as Group 15 element-containing rubbers) through the adhesive resin layer. This allows the fluorine rubber layer to provide heat and oil resistance where needed, while other layers can provide structural support or additional functional properties, optimizing the balance between performance and cost by not requiring 100% fluorine rubber construction.
3Reliability
If nitrile rubber is used for oil resistance applications, then oil resistance improves, but heat aging resistance decreases compared to fluorine rubber
Solution Approach 1:
The patent divides the hose structure into multiple functional layers: a fluorine rubber layer (or other heat-resistant rubber) provides the heat aging resistance for the high-temperature engine room environment, while nitrile rubber or other oil-resistant rubbers are used in layers that contact oil or fuel. The adhesive resin layers bond these segmented functional layers together, allowing each layer to optimize its performance for its specific function without compromising the other properties.
Data Source
AI summary
An object of the present invention is to provide a laminate of an olefin-type rubber, which is non-polar or has a small polarity and which is difficult to bond with a different material, and a rubber comprising Group 15 elements, which is a different kind of rubber. The laminate according to the present invention includes a structure including, in order, an olefin-type rubber layer (A); an adhesive resin layer (B) containing at least one selected from the group consisting of an ethylene/vinyl acetate copolymer, a silane-modified ethylene/vinyl acetate copolymer, an ethylene/acrylic acid copolymer and an ionomer thereof, and an ethylene/methacrylic acid copolymer and an ionomer thereof; and a layer (C) containing a rubber containing Group 15 elements.