Polyolefin based hot melt adhesive composition
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Solution Overview
Problem
Existing hot melt adhesive compositions using thermoplastic polyolefins have high viscosity due to the use of peroxides, leading to industrial and economic drawbacks, and often result in unpleasant odors, making them unsuitable for applications like food packaging, while lacking good adhesive properties and high elongation.
Innovation Solution
A hot melt adhesive polyolefin composition comprising a high melt flow butene-1 copolymer with 2-4.5% ethylene units, combined with optional additional polymers, resins, and waxes or oils, which offers low viscosity, high elongation, and improved adhesion without the use of high peroxide amounts, thus overcoming the drawbacks of existing compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If high amount of peroxides is used to achieve low viscosity, then viscosity is reduced, but unpleasant odor is generated and industrial applicability is compromised
Solution Approach 1:
The patent removes peroxides from the adhesive composition entirely, extracting the harmful substance that causes unpleasant odor while maintaining the desired low viscosity through alternative polyolefin components with optimized molecular weight and composition
Solution Approach 2:
The patent changes the chemical composition parameters by using specific polyolefin blends with controlled molecular weights and comonomer contents, achieving viscosity reduction through physical and chemical property optimization rather than chemical degradation via peroxides
2Force
If peroxides are used in the production process, then low viscosity is achieved, but the composition becomes unsuitable for food packaging applications
Solution Approach 1:
The patent eliminates peroxides from the formulation, removing the source of unpleasant odor that would contaminate food packaging applications, while maintaining functional performance through alternative polyolefin component selection
3Strength
If conventional thermoplastic polyolefin compositions are used, then adhesive properties are achieved, but elongation is insufficient
Solution Approach 1:
The patent creates a composite adhesive system blending thermoplastic polyolefin with elastomeric polyolefin components, combining the adhesive strength of thermoplastics with the high elongation and flexibility of elastomers to achieve balanced performance
Data Source
AI summary
A hot melt adhesive polyolefin composition comprising a high melt flow butene-1 copolymer suitable to be used as a glue in paper and packaging industry, in furniture manufacture e.g. for edgebands, particularly square edges and softforming, for paneling in high moisture environments, particularly suitable for acting as a glue in tufted or needle punched carpets.