Biodegradable Thermal Adhesive Coating Composition
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Solution Overview
Problem
Conventional package materials, such as laminating films made from PE and PP plastics, are not biodegradable and lack environmental friendliness, while alternative materials based on starch face issues with viscosity increase over time, making them unsuitable for various applications.
Innovation Solution
A biodegradable thermal adhesive coating composition comprising thermoplastic starch, a pH regulating agent, a viscosity stabilizing agent, a first solvent, a second solvent, and a natural resin, which is stable in viscosity and maintains consistent adhesive strength, suitable for application on various substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If starch-based materials are used as biodegradable alternatives to conventional plastics, then environment-friendliness is improved, but viscosity increases over time due to hydrogen bond formation between starch chains, making distribution impossible
Solution Approach 1:
The patent introduces a viscosity stabilizing agent as an intermediary substance that interferes with the hydrogen bonding between starch chains. This agent acts as a mediator that prevents the direct interaction between starch molecules that would otherwise lead to viscosity increase, thereby maintaining stable viscosity over time while preserving the biodegradable nature of starch-based materials
Solution Approach 2:
The patent modifies the chemical environment by adding a pH regulating agent that changes the pH parameters of the system. This parameter change affects the ionization state of starch molecules and their tendency to form hydrogen bonds, thereby controlling viscosity stability. By adjusting pH as a key parameter, the patent prevents the time-dependent viscosity increase that would otherwise occur in pure starch-based materials
2Strength
If conventional thermal adhesive materials (PE and PP plastics) are used, then adhesion performance is maintained, but biodegradability is lost and environmental friendliness deteriorates
Solution Approach 1:
The patent creates a composite adhesive material that combines starch-based biodegradable components with natural resins and functional additives. This composite formulation achieves adhesion performance comparable to conventional plastic-based adhesives while maintaining biodegradability. The synergistic combination of multiple components allows the material to exhibit both strong adhesive properties and environmental compatibility
Solution Approach 2:
The patent modifies the chemical composition parameters by replacing synthetic plastic polymers with natural polymer alternatives (starch and natural resins). By changing the fundamental chemical parameters from petroleum-based polymers to bio-based polymers, the patent achieves both adhesion performance and biodegradability, resolving the contradiction between strength and environmental friendliness
3Adaptability or versatility
If starch gelatinization is performed to improve processability, then adhesion to various substrates is enhanced, but hydrogen bond formation increases viscosity making further processing difficult
Solution Approach 1:
The viscosity stabilizing agent serves as an intermediary that is introduced during or after gelatinization to prevent excessive hydrogen bond formation. This agent allows the starch to achieve proper gelatinization for good substrate adhesion while simultaneously preventing the viscosity increase that would hinder further processing and distribution
Solution Approach 2:
The patent applies preliminary action by adding the pH regulating agent and viscosity stabilizing agent before or during the gelatinization process. This preliminary introduction of protective agents ensures that when gelatinization occurs and hydrogen bonds begin to form, the stabilizing agents are already in place to prevent excessive viscosity increase, thereby maintaining processability throughout the manufacturing sequence
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 composition achieves excellent thermal adhesive strength, durability, and water resistance, while being adjustable in viscosity and environmentally friendly, making it suitable for use in package materials across various industries.
Implementation Method 1
hydrogen bonds between starch chains increase as time elapses after starch gelatinization
Implementation Method 2
comprising thermoplastic starch (TPS), a pH regulating agent
Implementation Method 3
hydrogen bonds between starch chains increase as time elapses after starch gelatinization, leading to an increase of viscosity of a reactant
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
The present disclosure relates to a biodegradable thermal adhesive coating composition and a method of preparation thereof, and more specifically, it relates to a biodegradable thermal adhesive coating composition, which is biodegradable in order to be environment-friendly, excellent in its adhesion to substrates of various materials, such as paper, plastic, etc., water-resistant, stable in the viscosity change, and suitable for a production process using thermal adhesion, and a method of preparation thereof.