Multi-block copolymer gum base reduces surface adhesion
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Solution Overview
Problem
Conventional chewing gum bases adhere excessively to environmental surfaces, making them difficult to remove and causing litter issues when improperly discarded.
Innovation Solution
Development of novel chewing gum formulations using multi-block copolymers with hydrogen bond donor and acceptor groups, which form crosslinks to increase elasticity and reduce adhesion to surfaces, allowing for easier removal of gum cuds from environmental surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional gum bases are used, then the gum provides characteristic chewy texture and elasticity, but the gum adheres excessively to environmental surfaces making it difficult to remove
Solution Approach 1:
The patent modifies the chemical composition parameters of the gum base by incorporating specific polymers (polyvinyl acetate, polyethylene, polypropylene) in controlled ratios, and adding adhesion-reducing agents such as waxes and oils. These parameter changes alter the surface properties of the gum to reduce adhesion while preserving the bulk elastic properties needed for chewing functionality.
Solution Approach 2:
The invention creates a composite gum base material combining multiple polymer components (synthetic and natural elastomers, plastics, waxes, oils) with complementary properties. The composite structure allows the gum to simultaneously exhibit elasticity from the polymer matrix and reduced adhesion from the hydrophobic wax and oil components, resolving the contradiction between sticking and弹性能.
2Stability of the object's composition
If conventional gum bases are used, then the gum maintains cohesive structure during chewing, but the discarded cud adheres to surfaces and is difficult to remove
Solution Approach 1:
The patent adjusts compositional parameters by incorporating adhesion-reducing agents (waxes, oils, specific polymer ratios) that modify the surface energy of the gum cud. This allows the gum to maintain internal cohesion for proper chewing function while presenting a low-adhesion surface that prevents strong bonding to environmental surfaces, thereby reducing persistent gum litter.
Solution Approach 2:
The invention converts the naturally adhesive property of gum (which causes litter problems) into a beneficial characteristic by carefully controlling the balance between cohesive forces (maintaining cud integrity) and adhesive forces (reducing surface bonding). The modified gum base maintains enough adhesion to hold together during chewing but reduces excessive adhesion that causes difficult removal and environmental pollution.
3Strength
If multi-block copolymers with hydrogen bond crosslinks are used, then elasticity is increased, but adhesion to surfaces is reduced
Solution Approach 1:
The patent introduces hydrogen bond crosslinks as intermediary connections between polymer chains within the gum base matrix. These crosslinks act as dynamic connectors that provide elastic recovery (acting like molecular springs) while the hydrophobic nature of the crosslinking groups reduces direct adhesion to external surfaces. The crosslinks mediate between the need for internal elasticity and external non-stick properties.
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 multi-block copolymer-based gum bases exhibit reduced adhesion to surfaces, enabling cuds to be removed with minimal effort, leaving little to no residue, thus addressing the issue of gum litter.
Implementation Method 1
the two or more polymeric blocks and/or the linking unit (if present) will collectively comprise at least one hydrogen bond donor group and at least one hydrogen bond acceptor group. The presence of the hydrogen bond groups allows hydrogen bond crosslinks to form between adjacent multiblock copolymer chains to increase elasticity of the polymer system
Data Source
AI summary
Chewing gums and chewing gum bases which are cud-forming and chewable at mouth temperature contains a multi-block copolymer having at least two repeating sequences of at least two different polymeric blocks having at least three monomer units each. The multi-block copolymer optionally includes linking units and may be formulated to have non-covalent crosslinking between the copolymer chains. The multi-block copolymer is optionally plasticized with a compatible di-block copolymer to function as an elastomer system in the gum base. Characteristics of the multi-block copolymers can be selected to produce gum bases and chewing gums having desired properties. In some cases, chewed cuds formed from the gum bases may exhibit improved removability from environmental surfaces to which they may become undesirably attached.