Hot Melt Adhesive with Polar Polymer for Polyolefin
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Solution Overview
Problem
Polylactic acid-based hot melt adhesives exhibit poor adhesion and thermal stability, particularly on polyolefin substrates, limiting their application in vehicle interior materials due to compatibility issues with polyolefin and tackifier resins.
Innovation Solution
A hot melt adhesive composition comprising a polar functional group-modified polymer, an aliphatic polyester-based resin, an olefin-based polymer, and a tackifier resin, which enhances compatibility and adhesion properties, including the use of polylactic acid-based resins and poly(butylene succinate) with olefin-based polymers and tackifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If polylactic acid-based resin is used as hot melt adhesive, then environmental sustainability is improved, but adhesion property to polyolefin substrate deteriorates
Solution Approach 1:
The patent creates a composite hot melt adhesive system combining polylactic acid-based resin (environmentally friendly component) with polyolefin-based resin (provides adhesion to polyolefin substrates) and tackifier resin (enhances adhesion). This composite approach allows the adhesive to maintain environmental sustainability while achieving excellent adhesion to polyolefin substrates through the synergistic effects of the different resin components.
2Object-affected harmful factors
If polylactic acid-based resin is used as hot melt adhesive, then environmental sustainability is improved, but thermal stability deteriorates
Solution Approach 1:
The patent formulates a composite hot melt adhesive containing polylactic acid-based resin combined with polyolefin-based resin and tackifier resin. The polyolefin-based resin and tackifier resin components provide enhanced thermal stability to the formulation, compensating for the relatively lower thermal stability of pure polylactic acid-based resin, while maintaining the environmental sustainability benefits.
3Object-affected harmful factors
If polylactic acid-based resin is used as hot melt adhesive, then environmental sustainability is improved, but compatibility with tackifier resin deteriorates
Solution Approach 1:
The patent develops a composite hot melt adhesive formulation that combines polylactic acid-based resin with specific polyolefin-based resins and tackifier resins in optimized ratios. This composite system ensures good compatibility among all components, preventing phase separation and maintaining homogeneous adhesive properties, while preserving the environmental sustainability of the polylactic acid-based resin component.
4Object-affected harmful factors
If polylactic acid-based resin is used as hot melt adhesive, then environmental sustainability is improved, but tackiness deteriorates
Solution Approach 1:
The patent creates a composite hot melt adhesive system where polylactic acid-based resin is combined with polyolefin-based resin and tackifier resin. The tackifier resin component specifically enhances the tackiness of the adhesive formulation, compensating for the lower inherent tackiness of polylactic acid-based resin, while the overall composite maintains environmental sustainability.
Data Source
AI summary
An object of the present invention is to provide a hot melt adhesive being environmentally-friendly, having excellent adhesion property to various substrates such as paper substrate and polyolefin substrate, as well having excellent thermal stability. The present invention relates to a hot melt adhesive comprising: (A) a polar functional group-modified polymer, (B) an aliphatic polyester-based resin, (C) an olefin-based polymer, and (D) a tackifier resin.