Butene-1 Copolymer Hot Melt Adhesive for Temporary Bonding
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Solution Overview
Problem
Existing hot melt adhesives often create permanent bonds, leading to substrate damage when separation is attempted, and may have aesthetic issues due to residual adhesive, while adhesives with desirable aesthetics lack initial adhesion for many applications.
Innovation Solution
A hot melt adhesive composition comprising a copolymer of butene-1, wax, and tackifying resin, which initially exhibits adhesion and subsequently loses adhesion without damaging the substrates, allowing for temporary bonding and easy separation without fiber tear or unsightly residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If typical hot melt adhesives are used to form permanent bonds, then bond strength is improved, but substrate damage occurs during separation
Solution Approach 1:
The adhesive composition dynamically changes its properties over time, transitioning from an adhesive state with strong bonding capabilities to a non-adhesive state that releases easily. This temporal dynamic allows the bond to be strong during the bonding period but gentle during separation, eliminating substrate damage while maintaining bond strength when needed.
Solution Approach 2:
The adhesive undergoes parameter changes in its adhesive properties over time. Initially, it exhibits high adhesion strength for effective bonding, then progressively loses adhesive qualities until it becomes non-tacky and releases easily. This parameter transformation enables the adhesive to provide strong bonding when applied but gentle release during separation, resolving the contradiction between bond strength and substrate damage.
2Strength
If hot melt adhesive is used for permanent bonding, then adhesion is improved, but aesthetic appearance deteriorates due to residual adhesive
Solution Approach 1:
The adhesive dynamically transitions from a tacky, adhesive state to a non-tacky, non-adhesive state over time. This temporal evolution ensures that while the adhesive provides strong initial bonding and holds substrates together effectively, it subsequently loses its adhesive qualities and becomes aesthetically acceptable as it releases without leaving unsightly residue.
3Object-affected harmful factors
If adhesive with desirable aesthetic properties is used, then appearance is improved, but initial adhesion is insufficient for many applications
Solution Approach 1:
The adhesive performs preliminary bonding action with strong initial adhesion when first applied, effectively securing substrates together. After completing this preliminary bonding function, it then transitions to a non-adhesive state that provides desirable aesthetic properties. This sequence of actions—strong initial bonding followed by gentle release—resolves the contradiction between initial adhesion strength and aesthetic appearance.
4Strength
If adhesive provides strong initial bond, then bonding effectiveness is improved, but separation becomes difficult without fiber tear
Solution Approach 1:
The adhesive exhibits dynamic temporal behavior, providing strong initial bond strength for effective bonding during the required period, then progressively losing adhesive qualities until it becomes easy to separate without fiber tear. This temporal dynamic allows the same adhesive to be both strongly bonding and easily separable at different times, resolving the contradiction between bonding effectiveness and ease of separation.
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 composition provides initial bond strength for temporary applications, such as palletizing and container bonding, and subsequently loses adhesion within a controlled timeframe (0.5 seconds to 24 hours) to enable easy separation without substrate damage or aesthetic issues, maintaining non-tacky and brittle properties.
Implementation Method 1
The composition includes from about 10% by weight to about 80% by weight of a copolymer of butene-1, from about 5% by weight to about 60% by weight of a wax, and from about 5% by weight to about 70% by weight of a tackifying resin, wherein the composition initially exhibits adhesion qualities and subsequently exhibits non-adhesion qualities
Data Source
AI summary
The present invention includes compositions relating to a hot melt adhesive that includes a copolymer of butene-1, a wax, and a tackifying resin. The present invention further relates to adhesives initially exhibiting adhesion properties and subsequently non-adhesion qualities. Methods of using these adhesives are also part of the claimed invention.