Battery Packaging Material for Residue-Free Protective Tape Peeling
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Solution Overview
Problem
Existing battery packaging materials face issues with adhesive residues after peeling off protective tapes, which can damage the surface and affect the appearance, and these materials do not effectively prevent adhesive residues on non-colored layers.
Innovation Solution
A battery packaging material configuration with a substrate protective layer comprising a binder resin, wax, resin beads, and inorganic fine particles, where the surface gross value is set between 1% to 5%, allowing for good slipperiness and easy peeling of protective tapes without leaving adhesive residues, and includes a colored layer for improved visibility of adhesive residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protective tape firmly adheres to the packaging material, then the protective tape is not peeled off during the production process, but adhesive residues remain on the packaging material after peeling
Solution Approach 1:
The substrate protective layer incorporates solid fine particles (wax, resin beads, inorganic fine particles) to create local variations in surface properties. These particles create micro-roughness that provides localized low-adhesion zones, allowing the protective tape to adhere strongly in some areas while easily peeling in others, thus preventing adhesive residues without compromising adhesive strength during production
Solution Approach 2:
The invention changes the surface parameters of the substrate protective layer by controlling the gross value (1-15%) and incorporating solid fine particles with specific particle diameters (1-20 μm). This parameter modification creates an optimal balance between adhesive strength and easy peeling, resolving the contradiction between reliable adhesion during production and residue-free removal after production
2Ease of manufacture
If the protective tape is peeled off after production, then the packaging material surface is exposed, but adhesive residues damage the appearance
Solution Approach 1:
The invention converts the potentially harmful adhesive residues into a beneficial effect by using solid fine particles in the substrate protective layer. These particles create surface unevenness that prevents adhesive from fully contacting the packaging material, transforming the peeling process from harmful (leaving residues) to beneficial (easy removal without damage), thus improving ease of manufacture while eliminating appearance damage
3Ease of manufacture
If inorganic and/or organic solid fine particles are dispersed in the substrate protective layer, then slipperiness is imparted for good moldability, but the surface gross value increases
Solution Approach 1:
The invention optimizes the parameters of solid fine particles by selecting specific particle diameter ranges (1-20 μm) and controlling the total content rate (30-50 mass %). This parameter optimization achieves the desired balance: particles large enough to provide slipperiness for good moldability, but small and controlled in quantity to maintain surface gross value within the optimal range (1-15%), thus resolving the contradiction between ease of manufacture and manufacturing precision
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 material ensures easy peeling of protective tapes without adhesive residues, maintaining surface integrity and visibility of adhesive residues, thus preventing damage and improving the appearance of the packaging material.
Implementation Method 1
inorganic and/or organic solid fine particles are made to dispersedly include in a substrate protective layer serving as an outer surface of a battery packaging material, and the surface gross value of the substrate protective layer is set to 1 to 15%. With this configuration, slipperiness by the surface unevenness effect is imparted
Implementation Method 2
the substrate protective layer includes a binder resin and solid fine particles which are wax, resin beads and inorganic fine particles
Data Source
AI summary
The battery packaging material includes a substrate layer, a heat-fusible resin layer, a barrier layer arranged between the substrate layer and the heat-fusible resin layer, and a substrate protective layer as an outermost layer arranged on an outer side of the substrate layer. The substrate protective layer includes a binder resin, wax as solid fine particles, resin beads, and inorganic fine particles, and a gross value of the surface of the substrate protective layer is 1% and 5%.