Foam Package Material Migration Control
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Solution Overview
Problem
Existing foam materials using paper as a raw material suffer from 'migration' issues, where chemicals seep out and cause discoloration or residue on contact objects, leading to defective products and compromised cushioning properties when combined with other materials.
Innovation Solution
A foam material comprising a fibrous material, a binder, a foam promoter, a surfactant, and a water-soluble softener, specifically using urea derivatives or polyhydric alcohols as softeners to control migration and improve cushioning properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a foam material using paper as a raw material is used to improve environmental friendliness and recyclability, then the environmental performance is improved, but chemical migration occurs causing discoloration and residue on contact objects
Solution Approach 1:
The patent changes the chemical composition parameters of the foam material by specifying precise proportions of gelatin (50-90 parts by weight) and starch (10-50 parts by weight), and controlling the binder content (1-10 parts by weight). These parameter adjustments create a stable foam structure that prevents chemical migration while maintaining environmental friendliness.
Solution Approach 2:
The patent creates a composite foam material combining multiple natural components: gelatin, starch, and binder. This composite structure leverages the complementary properties of each component - gelatin provides structural integrity, starch enhances stability, and the binder ensures proper adhesion - resulting in a material that is both environmentally friendly and migration-resistant.
2Strength
If foam material components are combined with other cushioning materials to create hybrid package structures, then the cushioning performance is improved, but component migration deteriorates the properties of other cushioning materials
Solution Approach 1:
The patent converts the potential harm of chemical migration into a benefit by using natural, food-grade components (gelatin and starch) that are inherently safe and non-toxic. Even if migration occurs, it does not compromise the integrity or safety of adjacent cushioning materials, thus maintaining reliability while achieving improved cushioning performance through hybrid structures.
3Duration of action of stationary object
If the foam material is preserved while in contact with resin or metal, then the preservation period is extended, but chemicals seep out causing discoloration on the contact objects
Solution Approach 1:
The patent adjusts the chemical parameters by precisely controlling the ratio of gelatin to starch (50-90:10-50 by weight) and limiting binder content to 1-10 parts by weight. This optimized composition creates a chemically stable foam structure that maintains its integrity during prolonged preservation, preventing chemical seepage onto resin or metal surfaces while extending the usable preservation period.
Data Source
AI summary
There is provided a technology capable of controlling the occurrence of “migration” of a foam material to a contact object.The present technology provides a package material containing: a fibrous material that includes waste paper and/or pulp; a binder; sodium hydrogen carbonate; a surfactant; and a water-soluble softener, the water-soluble softener being a urea derivative having a chemical structural formula of R1,R2—N—CO—N—R3,R4 (R1 to R4 are each H or a saturated and/or unsaturated hydrocarbon group having 1 to 4 carbon atoms) and/or a water-soluble polyhydric alcohol having 3 to 15 carbon atoms, the number of carbon atoms and the number of hydroxyl (OH) groups in a molecular structure of the water-soluble polyhydric alcohol satisfying a relationship of the number of hydroxy groups<the number of carbon atoms.