Solvent-Free Adhesive Aging Time Reduction
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Solution Overview
Problem
Current solvent-free two-component laminating adhesives for flexible packaging face challenges in achieving practical packaging properties, such as poor adhesion and fragility, while also requiring extended aging times, which can be detrimental to the efficiency and quality of the lamination process.
Innovation Solution
A solvent-free two-component adhesive system comprising a polyisocyanate composition and a polyol composition, both containing a tertiary amine compound with multiple hydroxyl groups, which significantly shortens the aging time and enhances the curing properties, resulting in improved adhesion and texture of the laminated films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If an amine catalyst is used to shorten the aging time, then the aging time is reduced, but the adhesive coating becomes hard and fragile, resulting in poor practical packaging property
Solution Approach 1:
The patent changes the chemical parameters of the adhesive system by introducing a polyol composition containing a tertiary amine compound with multiple hydroxyl groups. This modifies the curing mechanism to achieve faster aging time without the harmful effects of conventional amine catalysts, specifically avoiding the creation of hard and fragile adhesive coatings while maintaining practical packaging properties.
Solution Approach 2:
The patent employs a composite adhesive system combining polyisocyanate composition with a polyol composition that contains both polyol and tertiary amine compound with multiple hydroxyl groups. This composite approach allows the system to benefit from accelerated curing while the polyol component provides flexibility and prevents brittleness, thus maintaining reliable packaging properties.
2Object-affected harmful factors
If conventional solvent-free two-component adhesives are used, then environmental load is reduced, but the aging time is extended, reducing lamination efficiency
Solution Approach 1:
The patent modifies the chemical composition parameters of the solvent-free adhesive system by incorporating a polyol composition containing a tertiary amine compound with multiple hydroxyl groups. This parameter change enables the adhesive to cure faster while maintaining the environmental benefits of being solvent-free, thus improving lamination efficiency without increasing environmental harm.
3Ease of manufacture
If conventional adhesive formulations are used, then the adhesive coating can be applied, but the laminated film exhibits poor adhesion and bubble entrainment
Solution Approach 1:
The patent uses a composite adhesive formulation combining polyisocyanate with a polyol composition containing tertiary amine compound and polyol. This composite structure ensures proper adhesion quality and reduces bubble entrainment in the laminated film while maintaining ease of coating application, addressing both manufacturing convenience and product reliability.
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 adhesive system ensures excellent curing properties, reduces bubble entrainment, and provides a better texture and appearance of the laminated films, while maintaining a practical packaging property, thus improving the overall efficiency and quality of the lamination process.
Implementation Method 1
a solvent-free two-component type adhesive comprising a polyisocyanate composition (X) containing a polyisocyanate (A), and a polyol composition (Y) containing a polyol (C) and a tertiary amine compound (B) having multiple hydroxyl groups
Implementation Method 2
a tertiary amine compound (B) having multiple hydroxyl groups... which significantly shortens the aging time and enhances the curing properties
Data Source
AI summary
Provided are a solvent-free two-component type adhesive capable of guaranteeing a practical packaging property, with an excellent curing property and significantly shortening aging time, a laminated film using the same, and a polyol composition for an adhesive. An adhesive, characterized in comprising a polyisocyanate composition (X) containing a polyisocyanate (A), and a polyol composition (Y) containing a polyol (C) and a tertiary amine compound (B) having multiple hydroxyl groups, as necessary components.