Rubber Laminate Structure for Bonding Low-Polarity Olefin 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, as they do not adhere strongly due to their inherent properties.
Innovation Solution
A laminate structure is created using an olefin-type rubber layer, an adhesive resin layer containing specific copolymers like ethylene/vinyl acetate, and a layer with Group 15 elements, such as nitrile rubber, where the adhesive resin layer enhances the bonding between these otherwise difficult-to-bond materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If olefin-type rubber and Group 15 element-containing rubber are directly bonded, then manufacturing simplicity is maintained, but bonding strength is insufficient
Solution Approach 1:
An adhesive resin layer is introduced as an intermediary between the olefin-type rubber layer and the Group 15 element-containing rubber layer. This adhesive layer contains specific functional groups that can chemically interact with both rubber types, thereby achieving strong bonding without requiring complex surface treatment or vulcanization processes on the rubber layers themselves.
Solution Approach 2:
The invention creates a composite laminate structure consisting of multiple layers: olefin-type rubber layer, adhesive resin layer, and Group 15 element-containing rubber layer. This composite structure combines the advantages of each material while overcoming their individual limitations, particularly the poor adhesion of olefin-type rubber to other materials.
2Reliability
If fluorine rubber is used to improve heat resistance and oil resistance, then performance is enhanced, but cost increases
Solution Approach 1:
Instead of using fluorine rubber throughout the entire hose structure, the invention applies it only in specific layers where its superior heat and oil resistance is most needed. The olefin-type rubber is used in other layers where cost-effectiveness and flexibility are priorities, achieving performance optimization without excessive cost increase.
Solution Approach 2:
The invention changes the compositional parameters of the laminate by controlling the thickness and arrangement of fluorine rubber layers relative to non-fluorine rubber layers. This allows optimization of the balance between performance (heat/oil resistance) and cost by adjusting the proportion of expensive fluorine rubber material.
3Strength
If adhesive resin layer is added to bond olefin-type rubber and Group 15 element-containing rubber, then bonding strength is improved, but device complexity increases
Solution Approach 1:
The bonding function is segmented from the rubber layers and assigned to a dedicated adhesive resin layer. This segmentation allows each layer to be optimized for its specific function: olefin-type rubber for flexibility and chemical resistance, adhesive resin for bonding, and Group 15 element-containing rubber for structural integrity.
Solution Approach 2:
The adhesive resin layer serves as a mediator that simplifies the overall manufacturing process by providing a reliable bonding interface without requiring complex surface treatments, primers, or post-bonding treatments on the rubber layers themselves.
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 laminate exhibits strong integration of olefin-type rubber and Group 15 element-containing rubber layers, improving mechanical properties and resistance to heat and fatigue, making it suitable for high-performance applications like automotive hoses.
Implementation Method 1
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
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.