Glove Adhesive Layer for Impact Pad Bonding
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Solution Overview
Problem
Conventional gloves used in labor such as civil engineering and construction lack sufficient adhesiveness between impact-resistant pads and the fiber material, leading to limited protection at bent areas and inadequate water and chemical resistance.
Innovation Solution
A glove design featuring a stretchable fiber glove main body, a coating layer made of natural rubber or acrylonitrile-butadiene rubber, impact-resistant pads with a base layer and protruding parts, and an adhesive layer to bond the coating layer and impact-resistant pads, enhancing adhesion and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the protection portion is directly bonded to the fiber material, then the structure is simple, but the adhesiveness is insufficient and the protection portion is likely to detach
Solution Approach 1:
An adhesive layer comprising a polyolefin resin is introduced between the protection portion and the glove main body. This intermediary layer provides sufficient bonding force to both surfaces, preventing detachment of the protection portion while maintaining structural simplicity.
Solution Approach 2:
The glove is constructed as a composite structure with multiple material layers: the glove main body made of stretchable fiber material, the adhesive layer made of polyolefin resin, and the protection portion made of rigid or semi-rigid material. This composite structure combines the advantages of each material to achieve both simplicity and reliability.
2Reliability
If the protection portion is arranged at bent areas of fingers, then the protection coverage is improved, but the adhesiveness becomes insufficient due to bending stress
Solution Approach 1:
The adhesive layer acts as a flexible intermediary that can accommodate bending stresses at finger joints while maintaining strong bonding. This allows the protection portion to be effectively positioned at bent areas without compromising adhesion strength.
Solution Approach 2:
The adhesive layer's material properties are selected to maintain bonding strength under varying stress conditions. The polyolefin resin provides adequate adhesion strength even when the glove is bent, allowing protection portions to be effectively placed at joint areas.
3Device complexity
If the fiber material is exposed at the surface, then the structure is simple, but the water resistance and chemical resistance are insufficient
Solution Approach 1:
A coating layer comprising a flexible film is applied to the outer surface of the glove main body. This thin film layer provides effective water resistance and chemical resistance while maintaining the flexibility and simplicity of the overall glove structure.
Solution Approach 2:
The glove employs a composite structure where the glove main body (stretchable fiber material) is combined with a coating layer (flexible film). This composite design provides both the simplicity of fiber construction and the protective properties of the film coating against water and chemicals.
4Strength
If sewing is used to fix the protection portion, then the bonding is strong, but holes are made in the coating layer reducing water and chemical resistance
Solution Approach 1:
The adhesive layer serves as a non-penetrating intermediary that bonds the protection portion to the glove main body without creating holes or openings in the coating layer. This maintains the integrity of the water and chemical barrier while providing sufficient bonding strength.
Solution Approach 2:
The mechanical sewing process is replaced with a chemical bonding process using the adhesive layer. This substitution eliminates the need to pierce the coating layer with needles, thereby maintaining water and chemical resistance while achieving strong bonding through adhesive chemistry.
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 improved adhesion and bonding between the coating layer and impact-resistant pads result in superior impact resistance, water resistance, and chemical resistance, while maintaining flexibility and preventing detachment at bent areas.
Implementation Method 1
an adhesive layer that bonds the coating layer and the impact-resistant pad together
Implementation Method 2
a coating layer that comprises a natural rubber or an acrylonitrile-butadiene rubber as a principal component and covers an external face of the glove main body
Implementation Method 3
Using, as an adhesive constituting the adhesive layer, the moisture-curing urethane-based hot-melt adhesive superior in processibility and adhesive force with respect to the rubber and the resin
Data Source
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AI summary
An object of the present invention is to provide a glove that is superior in impact resistance, water proofing property and chemical resistance, in which adhesiveness of an impact-resistant pad is relatively high. The glove of the present invention comprises: a glove main body that is stretchable and made of fiber; a coating layer that comprises a synthetic resin or a rubber as a principal component and covers an external face of the glove main body; at least one impact-resistant pad that comprises a synthetic resin or a rubber as a principal component and is arranged to at least a part of a dorsal side portion of an external face side of the coating layer on the glove main body; and an adhesive layer that bonds the coating layer and the impact-resistant pad together, wherein an adhesive constituting the adhesive layer is a moisture-curing urethane-based hot-melt adhesive. It is preferred that the impact-resistant pad is arranged on a portion corresponding to a joint of at least one finger. The impact-resistant pad is preferably provided with a base layer that is overlaid on the coating layer, and a protruding part that is arranged to protrude from an external face of the base layer. It is preferred that the average thickness of the base layer is no less than 0.1 mm and no greater than 1 mm.