Transparent Glue Stick Adhesive Mass Composition
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Solution Overview
Problem
Existing glue sticks often leave adhesive lumps on substrates due to improper use, have inherent colors making them unsuitable for transparent components, and lack sufficient strength and spreadability.
Innovation Solution
A dimensionally stable adhesive composition with a surfactant and sugar mixture, where the weight ratio of surfactant and sugar to water is at least 0.7:1, and a water content of 25-35% by weight, including a mixture of fatty alcohol derivatives and fatty acid salts, ensuring transparency and high strength without lump formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the adhesive has high strength, then bonding performance is improved, but applicability and spreadability deteriorate
Solution Approach 1:
The patent adjusts the chemical composition parameters of the adhesive, specifically the ratio of surfactant to sugar (weight ratio of 0.3 to 0.7) and water content (25-35%), to achieve optimal balance between strength and spreadability. This parameter optimization allows the adhesive to be both strong and easily applicable without forming lumps.
2Illumination intensity
If the adhesive is transparent, then suitability for bonding transparent components is improved, but inherent color increases
Solution Approach 1:
The patent uses specific surfactants (fatty alcohol derivatives and fatty acid salts) and sugars that maintain adhesive transparency while minimizing inherent color. The controlled water content (25-35%) and surfactant-sugar ratio further enhance transparency, making the adhesive suitable for bonding transparent components without significant coloration.
3Strength
If the adhesive is applied with high contact pressure, then bonding effectiveness is improved, but adhesive agglomerate detachment occurs
Solution Approach 1:
The patent optimizes the water content (25-35%) and surfactant-sugar ratio (0.3 to 0.7) to achieve the right balance between adhesive hardness and plasticity. This allows the adhesive to spread evenly under pressure without forming lumps or detaching agglomerates, ensuring reliable lump-free application while maintaining bonding effectiveness.
Solution Approach 2:
The surfactant acts as an intermediary substance that reduces surface tension and improves wetting properties. This allows the adhesive to spread smoothly on the substrate even under high contact pressure, preventing agglomerate formation and detachment while maintaining strong bonding.
4Stability of the object's composition
If the adhesive has sufficient hardness, then dimensional stability is improved, but spreadability deteriorates
Solution Approach 1:
The patent carefully controls the water content (25-35%) and surfactant-sugar ratio (0.3 to 0.7) to achieve optimal dimensional stability while maintaining good spreadability. The surfactant components improve wetting and reduce surface tension, allowing the adhesive to spread easily despite its hardness, eliminating the need for excessive rubbing.
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 achieves transparency, high strength, and improved applicability, preventing adhesive agglomerate detachment during use, allowing for effective bonding without lumps and maintaining transparency across a wide temperature range.
Implementation Method 1
the surfactants containing a mixture of at least one fatty alcohol derivative and at least one salt of a fatty acid or a fatty acid derivative
Implementation Method 2
the weight ratio of the sum of surfactant and sugar to water is at least 0.7:1
Implementation Method 3
the ratio of fatty alcohol derivative to the salt of the fatty acid or its derivative is from 4:1 to 1:4
Data Source
AI summary
The present invention relates to a dimensionally stable adhesive mass for a glue stick, containing at least one polymer, a surfactant, a sugar, and water, characterized in that the weight ratio of the sum of surfactant and sugar to water is at least 0.7:1 and the glue stick has a water content of 25 to less than 35 wt% relative to the total weight of the adhesive mass. The invention further relates to a method for producing such an adhesive mass, to a glue stick that contains such an adhesive mass, and to the use of such adhesive masses to adhesively bond paper, in particular photographic paper, cardboard, glass, and/or plastic.