Segmented Hot Melt Adhesive Rod with Cleaning Agent
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Solution Overview
Problem
Reactive hot melt adhesives used in hot melt adhesive guns tend to irreversibly harden and clog the equipment, making it difficult to clean and reuse, especially when exposed to moisture or radiation, leading to inefficient processing and storage issues.
Innovation Solution
A rod-shaped hot melt adhesive body with distinct sections of reactive hot melt adhesive and a cleaning agent, where the cleaning agent is designed to inactivate the reactive groups of the adhesive, allowing for easy separation and prevention of clogging, with visual differentiation via color to facilitate user control during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reactive hot melt adhesive is used to achieve strong bonding performance, then adhesive strength is improved, but the adhesive irreversibly hardens and clogs the equipment
Solution Approach 1:
The adhesive stick is divided into multiple functional sections: a first section containing reactive hot melt adhesive for bonding, and a second section containing cleaning agent for removing residual adhesive. This segmentation allows the adhesive to perform its bonding function while the cleaning section prevents equipment clogging by dissolving residual reactive adhesive.
Solution Approach 2:
The cleaning agent in the second section acts as an intermediary substance that reacts with the residual reactive hot melt adhesive in the equipment. This intermediary chemical reaction dissolves or deactivates the hardened adhesive, preventing permanent clogging and enabling equipment reuse.
2Strength
If reactive hot melt adhesive is used to achieve chemical crosslinking and strong bonds, then bonding performance is improved, but cleaning and reuse of equipment becomes difficult
Solution Approach 1:
The adhesive stick is segmented into a bonding section (reactive adhesive) and a cleaning section (cleaning agent). This allows the equipment to be cleaned in-situ during the adhesive application process, making maintenance easier without requiring disassembly or external cleaning procedures.
Solution Approach 2:
The cleaning agent in the second section enables the equipment to clean itself automatically during normal operation. As the reactive adhesive is dispensed, the cleaning agent follows and removes residual adhesive from the dispensing mechanism, eliminating the need for separate manual cleaning operations.
3Duration of action of stationary object
If reactive hot melt adhesive is stored for extended periods, then adhesive performance is maintained, but exposure to moisture or radiation causes irreversible hardening
Solution Approach 1:
The adhesive stick is segmented into sealed functional sections that isolate the reactive adhesive from environmental factors during storage. The cleaning agent section acts as a barrier and reactive scavenger, preventing moisture and radiation from triggering premature crosslinking of the adhesive.
Solution Approach 2:
The cleaning agent is pre-positioned in the second section to counteract any premature reaction of the reactive adhesive. This preliminary protective action prevents moisture or radiation from causing irreversible hardening during storage, maintaining adhesive stability until use.
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
This solution enables efficient processing and cleaning of hot melt adhesive guns by allowing the reactive adhesive to be easily distinguished and removed, preventing clogging and extending the usability of the equipment, while maintaining the adhesive's performance through chemical crosslinking.
Implementation Method 1
The chemically reactive groups lead to (post-)crosslinking or, in addition to the physical adhesive properties, also to the formation of chemical adhesive bonds
Implementation Method 2
the cleaning agent contains at least one additive inactivating the chemically reactive groups of the reactive hot melt adhesive, wherein the additive has a functional group that reacts with the chemically reactive groups
Data Source
Figure 1A~1D
Figure 2A~2B
Figure 3~3B
AI summary
The present invention relates to a rod-shaped hot melt adhesive body for use in hot melt glue guns, wherein the hot melt adhesive body has at least one first section comprising or consisting of at least one reactive hot melt adhesive and at least one second section comprising or consisting of at least one cleaning agent (dishwashing liquid), wherein the first section and/or the reactive hot melt adhesive on the one hand and the second section and/or the cleaning agent on the other hand are optically and/or visually different from each other, in particular different in color from each other.