PVC Resin Sheet Welding via Trimellitic Plasticizer and Hydrotalcite
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Solution Overview
Problem
Existing methods for welding polyvinyl chloride-based resin sheets with non-woven fabrics often result in decomposition or carbonization due to the need for heating, which compromises weldability and thermal stability.
Innovation Solution
A polyvinyl chloride resin sheet is developed by blending trimellitic acid-based plasticizers, phthalic acid-based plasticizers, and hydrotalcite-based compounds at specific ratios to enhance weldability and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If thermal lamination methods are used to weld polyvinyl chloride resin sheet with non-woven fabric, then direct welding is achieved, but decomposition or carbonization of the resin occurs due to heating
Solution Approach 1:
The patent modifies the chemical composition parameters of the polyvinyl chloride resin by incorporating specific additives (plasticizers, stabilizers, and flame retardants) to change its thermal properties. This allows the resin to withstand welding temperatures without decomposition, resolving the contradiction between achieving weldability and maintaining thermal stability.
Solution Approach 2:
The patent introduces intermediary substances (stabilizers and plasticizers) that mediate between the heating process and the polyvinyl chloride resin. These intermediaries protect the resin from thermal damage during welding, enabling direct thermal welding while preventing decomposition and carbonization.
2Strength
If heating is applied to weld the resin sheet, then bonding with non-woven fabric is achieved, but decomposition and carbonization compromise weld quality
Solution Approach 1:
The patent converts the potentially harmful effect of heat into a beneficial welding process by using heat-resistant additives. The stabilizers and flame retardants transform the harmful thermal energy that would cause decomposition into a controlled welding heat source that creates strong bonds without damage.
Solution Approach 2:
Stabilizers and flame retardants act as intermediaries that protect the polyvinyl chloride resin from decomposition and carbonization during the heating process. These substances absorb or neutralize the harmful thermal effects while allowing the beneficial bonding process to occur.
3Ease of operation
If conventional plasticizers are used in polyvinyl chloride resin, then flexibility is improved, but thermal stability and weldability deteriorate
Solution Approach 1:
The patent creates a composite plasticizer system combining multiple types of plasticizers (phthalate-based and adipate-based) with stabilizers and flame retardants. This composite approach provides both the flexibility needed for ease of operation and the thermal stability required for weldability, resolving the contradiction between these properties.
Solution Approach 2:
The patent changes the chemical composition parameters by using specific ratios of different plasticizers and adding stabilizing compounds. This modified composition maintains flexibility while significantly improving thermal stability and weldability compared to conventional single-type plasticizer systems.
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 resulting laminated sheet exhibits improved weldability and high thermal stability, preventing decomposition and carbonization during the welding process, ensuring strong and durable bonds between the resin sheet and the non-woven fabric.
Implementation Method 1
a polyvinyl chloride resin sheet comprising polyvinyl chloride and, with respect to 100 parts by mass of the polyvinyl chloride, 40 to 70 parts by mass of a trimellitic acid ester-based plasticizer, 1 to 35 parts by mass of a phthalic acid ester-based plasticizer, and 0.5 to 15 parts by mass of a hydrotalcite-based compound
Data Source
Figure 1~2
Figure 3
AI summary
[Problem] To provide a polyvinyl chloride resin sheet having high thermal stability and favorable weldability and a laminated sheet using the same. [Solution] A polyvinyl chloride resin sheet comprising a polyvinyl chloride resin and, with respect to 100 parts by mass of the polyvinyl chloride resin, 40-70 parts by mass of a trimellitic acid ester-based plasticizer, 1-35 parts by mass of a phthalic acid ester-based plasticizer, and 0.5-15 parts by mass of a hydrotalcite-based compound. A laminated sheet having the polyvinyl chloride resin sheet and a sheet-like base material.