Polyolefin Adhesive Tape with Ethylene-Vinyl Acetate Base
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Solution Overview
Problem
Conventional adhesive tapes for electronic devices lack sufficient antistatic properties and are inadequate in evaluating the suitability of their bases for narrow width applications, particularly in terms of impact resistance, shear deformation rate during heating, pressing force, and processability, due to insufficient physical property evaluation methods.
Innovation Solution
A polyolefin-based adhesive tape with a base composed of 30% or more ethylene-vinyl acetate copolymer, which provides enhanced tensile modulus, bending moment, and antistatic properties, suitable for narrow width applications, and an acrylic adhesive layer for improved adhesion and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyolefin based foam base is used for adhesive tape, then the base provides basic adhesion support, but the antistatic property is insufficient for electronic device applications
Solution Approach 1:
The invention changes the chemical composition parameters of the foam base by incorporating specific polyolefin resins with particular molecular structures and ratios, transforming the material's electrical properties to achieve antistatic functionality while maintaining foam structure
Solution Approach 2:
The invention creates a composite foam base material combining polyolefin resin with antistatic agents or conductive fillers, integrating multiple material properties to simultaneously achieve structural support and antistatic performance for electronic device applications
2Length of moving object
If the adhesive tape width is narrowed for electronic device applications, then the device size is reduced, but the base strength becomes insufficient leading to deformation and fracture
Solution Approach 1:
The invention changes the physical and mechanical parameters of the foam base by adjusting resin composition, crosslinking degree, and foam density to achieve high strength-to-weight ratio, enabling narrow tape design without sacrificing structural integrity
Solution Approach 2:
The invention applies local reinforcement strategies by optimizing the foam cell structure and resin distribution in critical areas of the narrow tape, providing enhanced strength where needed while maintaining overall flexibility and thin profile
3Measurement precision
If conventional physical property evaluation methods are used, then basic mechanical properties can be measured, but properties such as impact resistance, shear deformation rate during heating, pressing force, and processability cannot be sufficiently evaluated
Solution Approach 1:
The invention segments the evaluation process into distinct test modules for different properties (impact resistance, shear deformation, pressing force, processability), allowing systematic measurement of complex characteristics that cannot be assessed by conventional single-method approaches
Data Source
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AI summary
Disclosed is an adhesive tape wherein the adhesive tape has an adhesive layer on one side or both sides of a base, the base contains 30% by mass or more of an ethylene-vinyl acetate copolymer, and the tensile modulus of the base measured according to JIS K7161 2014 is 30 N/mm2 or more, and the adhesive tape has excellent properties such as impact resistance, an antistatic property, shear deformation rate during heating and pressing force.