PVC Adhesive Tape High Boiling Plasticizer Heat Resistance
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Solution Overview
Problem
Conventional polyvinyl chloride-based adhesive tapes used for bundling high-voltage cables in electric and hybrid cars face issues with heat resistance, as they tend to crack under high temperature conditions, and the use of polyester-based plasticizers leads to adhesion problems and high costs due to ionizing radiation processing.
Innovation Solution
An adhesive tape with a substrate composed of 40 to 65 parts by mass of high boiling point plasticizer (such as trimellitic acid ester) and 5 to 15 parts by mass of antimony trioxide, combined with a rubber-based adhesive, enhances mechanical properties and prevents cracking at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyvinyl chloride based adhesive tape is used for bundling high-voltage cables, then it has adequate flexibility and elongation properties, but it cannot prevent occurrence of cracks when exposed to high temperature environment for long periods
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive layer by specifying precise proportions of rubber components (10-30 parts natural rubber, 70-90 parts synthetic rubber), tackifier resin (30-70 parts), and plasticizer (10-30 parts). This compositional parameter optimization enables the adhesive to maintain both flexibility and heat resistance, preventing cracks at high temperatures while preserving elongation properties.
Solution Approach 2:
The patent creates a composite adhesive system combining multiple material components: natural rubber, synthetic rubber, tackifier resin, and plasticizer in specific ratios. This composite formulation synergistically provides thermal stability from the rubber components, adhesion from the tackifier resin, and flexibility from the plasticizer, resolving the contradiction between heat resistance and crack prevention.
2Temperature
If polyester based plasticizer is used with ionizing radiation crosslinking to achieve high heat resistance, then heat resistance is improved, but adhesion properties deteriorate and manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the problematic polyester based plasticizer and ionizing radiation crosslinking process from the system. Instead, it uses a simplified plasticizer system combined with a specifically formulated rubber-based adhesive that achieves heat resistance through compositional design rather than crosslinking, thereby maintaining adhesion properties and reducing manufacturing complexity.
Solution Approach 2:
The patent replaces expensive ionizing radiation crosslinking processing with a cost-effective chemical composition approach using readily available rubber components and plasticizers. This substitution achieves comparable or superior heat resistance without requiring costly radiation equipment or complex processing steps, making the solution more economically viable.
3Stability of the object's composition
If acryl based adhesive is used to improve plasticizer transfer by controlling SP value to 9.0 or higher, then transfer is improved, but effect is low with rubber based adhesives
Solution Approach 1:
The patent optimizes the SP value parameters of the adhesive components by selecting synthetic rubber with appropriate solubility characteristics and matching plasticizer properties. This parameter optimization ensures effective plasticizer transfer to the adhesive layer while maintaining the advantages of rubber-based adhesives, achieving both composition stability and adhesion properties.
Data Source
AI summary
An adhesive tape has superior mechanical properties, and can suppress occurrence of cracks after being exposed to high temperature conditions for a long period of time. The adhesive tape includes a substrate and an adhesive layer formed on one side of the substrate; wherein the substrate is made of a resin composition including 40 to 65 parts by mass of high boiling point plasticizer and 5 to 15 parts by mass of antimony trioxide with respect to 100 parts by mass of polyvinyl chloride resin.