Colored Acrylic Adhesive Tape for Heat-Resistant Uniform Masking
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Solution Overview
Problem
Conventional colored pressure-sensitive adhesive tapes used in skin-material securing applications for in-car heaters lack sufficient heat resistance and uniform masking properties due to transmittance variations, especially when the polarity of the pressure-sensitive adhesive layer is increased for enhanced heat resistance.
Innovation Solution
A double-sided pressure-sensitive adhesive tape with a pressure-sensitive adhesive layer comprising an acrylic pressure-sensitive adhesive and a coloring agent, having a storage modulus of 4.0×10^4 Pa at 150°C and fewer than 15 aggregates of 5 µm or more in a 5 cm × 5 cm portion, along with a thickness of 10 µm to 50 µm, and using a rosin-based resin as a binder for the coloring agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the polarity of the pressure-sensitive adhesive layer is increased to enhance heat resistance, then heat resistance is improved, but transmittance variation increases and masking properties deteriorate
Solution Approach 1:
The invention changes the chemical composition parameters of the pressure-sensitive adhesive by incorporating specific polar groups (carboxyl, hydroxyl, or amino groups) into the adhesive formulation. This allows the adhesive to achieve high heat resistance through increased polarity while maintaining uniform transmittance properties, resolving the contradiction between heat resistance and transmittance uniformity.
Solution Approach 2:
The invention uses a composite pressure-sensitive adhesive formulation that combines acrylic polymer base with specific functional additives containing polar groups. This composite approach enables the adhesive to simultaneously achieve high heat resistance through polar group interactions and uniform optical properties through controlled dispersion and composition, preventing transmittance variation.
2Ease of manufacture
If a conventional coloring agent is used in the pressure-sensitive adhesive layer, then coloration is achieved, but heat resistance is insufficient
Solution Approach 1:
The invention modifies the chemical parameters of the pressure-sensitive adhesive by incorporating specific polar groups (carboxyl, hydroxyl, or amino groups) into the adhesive formulation. This allows the adhesive to achieve high heat resistance through increased polarity while maintaining uniform transmittance properties, resolving the contradiction between heat resistance and transmittance uniformity.
Solution Approach 2:
The invention uses a composite pressure-sensitive adhesive formulation that combines acrylic polymer base with specific functional additives containing polar groups. This composite approach enables the adhesive to simultaneously achieve high heat resistance through polar group interactions and uniform optical properties through controlled dispersion and composition, preventing transmittance variation.
3Manufacturing precision
If the pressure-sensitive adhesive layer is made thinner to reduce visibility, then masking properties improve, but heat resistance may be compromised
Solution Approach 1:
The invention changes the chemical composition parameters of the pressure-sensitive adhesive by incorporating specific polar groups (carboxyl, hydroxyl, or amino groups) into the adhesive formulation. This allows the adhesive to achieve high heat resistance through increased polarity while maintaining uniform transmittance properties, resolving the contradiction between heat resistance and transmittance uniformity.
Solution Approach 2:
The invention uses a composite pressure-sensitive adhesive formulation that combines acrylic polymer base with specific functional additives containing polar groups. This composite approach enables the adhesive to simultaneously achieve high heat resistance through polar group interactions and uniform optical properties through controlled dispersion and composition, preventing transmittance variation.
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 tape achieves excellent heat resistance and masking properties with a total light transmittance of 50% or less, enhancing cohesive force and reducing thickness when substrate-free, suitable for vehicle interior parts.
Implementation Method 1
the pressure-sensitive adhesive layer has a storage modulus (G') at 150°C of 4.0×10^4 Pa or more
Data Source
AI summary
The double sided pressure-sensitive adhesive tape of the present invention includes a pressure-sensitive adhesive layer containing an acrylic pressure-sensitive adhesive and a coloring agent, wherein the pressure-sensitive adhesive layer has a storage modulus (G') at 150°C of 4.0×104 Pa or more, and the number of aggregates of the coloring agent having a longitudinal length of 5 µm or more in the pressure-sensitive adhesive layer is 15 or less when a 5 cm × 5 cm portion is observed. The present invention can provide a double sided pressure-sensitive adhesive tape having excellent heat resistance and masking properties.