Backing-Paper-Free Cold Laminating Film Release Layer Composition
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Solution Overview
Problem
Conventional backing-paper-free cold laminating films experience bubble formation during the laminating process due to high peel strength, and their release force is affected by external environmental conditions, leading to instability and increased manufacturing costs.
Innovation Solution
An ultra-quiet backing-paper-free cold laminating film comprising a substrate layer with a release layer and an adhesive layer, where the release layer is formed by drying a specific composition including 2-ethylhexyl acrylate, vinyltrimethoxysilane, di-t-butyl cumene peroxide, and fluorosiloxane, which reduces peel strength and ensures stability by maintaining consistent release force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the peel strength of the cold laminating film is increased to improve bonding, then the adhesive force is enhanced, but bubbles are easily formed during the laminating process
Solution Approach 1:
The invention modifies the chemical composition parameters of the release layer by incorporating specific silicone resins, silicones, and wax powders in controlled proportions. This changes the physical and chemical properties of the release layer to achieve optimal release force that prevents bubble formation while maintaining adequate bonding.
Solution Approach 2:
The invention creates a composite release layer by combining multiple materials (silicone resin, silicone, wax powder, and other components) that work synergistically. This composite structure provides both the necessary release properties to prevent bubbles and the adhesive properties for proper bonding.
2Ease of manufacture
If conventional release agents are used, then the manufacturing process is simple, but the release force is affected by external environmental conditions leading to instability
Solution Approach 1:
The invention changes the chemical composition parameters of the release agent to include specific ratios of silicone-based materials and wax powders. This compositional modification makes the release force insensitive to environmental variations while maintaining manufacturing simplicity through a straightforward formulation process.
3Strength
If backing paper is used in cold laminating films, then the structural integrity is improved, but the manufacturing cost increases and environmental burden increases
Solution Approach 1:
The invention extracts and removes the backing paper component from the cold laminating film structure. The release layer is directly applied to the substrate, eliminating the need for separate backing paper while maintaining structural integrity through the optimized release layer composition.
Solution Approach 2:
The invention enhances the local quality of the release layer by concentrating functional materials (silicone resin, silicone, wax powder) in this specific layer. This localized enhancement provides the necessary structural support and release properties without requiring a separate backing paper layer.
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 film achieves low and stable peel strength, preventing bubble formation and maintaining adhesive force over time, even under varying environmental conditions, while reducing environmental impact and manufacturing costs.
Implementation Method 1
50-75 parts of 2-ethylhexyl acrylate, 10-30 parts of vinyltrimethoxysilane, 0.5-1.5 parts of 1-methyl-1-phenylethyl hydroperoxide, and 20-30 parts of vinyl-terminated silicone resin are added into a reactor, and the reaction mixture is stirred and heated for 2-4 hrs
Implementation Method 2
2-5 parts of di-t-butyl cumene peroxide are added into the reactor, and stirred for 1-3 hrs
Implementation Method 3
30-50 parts of ethyl acetate, and 50-80 parts of ethylene glycol dimethyl ether are added into the reactor
Implementation Method 4
the release layer is obtained by drying a release agent applied on the substrate layer
Data Source
AI summary
The present invention discloses an ultra-quiet backing-paper-free cold laminating film comprising a substrate layer, a release layer, and an adhesive layer, the release layer and the adhesive layer being each attached to a respective side of the substrate layer, the release layer being obtained by drying a release agent applied on the substrate layer, and the release agent consisting of the following components by weight: 2-ethylhexyl acrylate, vinyltrimethoxysilane, 1-methyl-1-phenylethyl hydroperoxide, vinyl-terminated silicone resin, di-t-butyl cumene peroxide, fluorosiloxane, ethyl acetate, ethylene glycol dimethyl ether, a toughening agent, polysiloxane-polyether copolymer, silicone and wax powder. In the invention, the peel strength is reduced; it is ensured that the release force of the cold laminating film is not affected by the external environment, such that the cold laminating film has good stability; and meanwhile the subsequent adhesion of the release layer is improved, so that it can ensure that the adhesive force of the adhesive layer would not be affected after long-term adhesion between the adhesive layer and the release layer.