Silane Heat-Sealable Textile Structure for Waterproof Bonding
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Solution Overview
Problem
Existing heat-sealable textile fabrics face challenges in achieving sufficient adhesion to hydrophobic outer materials, particularly those siliconized for rain protection, where traditional sewing methods compromise waterproofness.
Innovation Solution
A heat-sealable textile fabric with a woven or knitted carrier and a double-dot adhesive layer featuring polymeric materials like polyurethane, copolyester, or copolyamide, combined with silanes such as aminosilanes or epoxysilanes, applied in a grid pattern to ensure strong adhesion without the need for sewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional adhesive layer is applied to the textile fabric, then the adhesion to hydrophobic outer materials is improved, but the adhesion force remains insufficient on siliconized outer materials
Solution Approach 1:
The adhesive layer uses a composite system combining polymeric adhesive materials (polyurethane, copolyester, or copolyamide) with silane compounds. This composite structure allows the polymeric component to provide base adhesion while the silane component specifically bonds to hydrophobic siliconized surfaces, achieving reliable adhesion on challenging substrates like rain protection fabrics.
Solution Approach 2:
The invention modifies the chemical composition parameters of the adhesive layer by incorporating silane compounds at specific concentrations (0.1-5% by weight). This parameter change enables the adhesive to chemically interact with hydrophobic surfaces through silane crosslinking, transforming the adhesive's performance on siliconized materials from insufficient to highly effective.
2Reliability
If sewing is used to ensure adhesion on hydrophobic materials, then adhesion reliability is improved, but waterproofness is compromised
Solution Approach 1:
The invention replaces the mechanical sewing system with a chemical adhesive system. Instead of using needles and thread to physically join fabrics (which creates puncture holes compromising waterproofness), the silane-enhanced adhesive layer chemically bonds to both the textile fabric and the hydrophobic outer material, achieving reliable adhesion without mechanical penetration.
Solution Approach 2:
The silane compound acts as a chemical intermediary between the polymeric adhesive and the hydrophobic siliconized surface. The silane molecules form bridge structures that bond to both the adhesive matrix and the siliconized fabric, enabling adhesion on surfaces that are otherwise difficult to bond without compromising the fabric's waterproof properties.
3Strength
If a complex adhesive system is used to achieve sufficient adhesion on hydrophobic materials, then adhesion force is improved, but manufacturing complexity increases
Solution Approach 1:
The invention merges the polymeric adhesive material with silane compounds into a single integrated adhesive layer application. Rather than requiring separate layers or sequential applications of different materials, the silane is incorporated directly into the adhesive composition, simplifying the manufacturing process while achieving enhanced adhesion on hydrophobic surfaces.
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 achieves significantly higher adhesion forces, allowing for complete omission of sewing processes while maintaining waterproofness, ensuring firm fixation and watertightness in rainwear.
Implementation Method 1
the upper point of the double-point coating contains a polyurethane, copolyester or copolyamide and additionally at least one silane
Implementation Method 2
excellent adhesion can be achieved with the textile fabric of this invention, with the adhesion forces being in some cases significantly higher than can usually be achieved
Implementation Method 3
heat-sealable, textile fabric with a carrier based on a woven, knitted fabric, optionally with weft insertion, or a fleece and with an adhesive layer applied thereon in a grid pattern
Data Source
AI summary
This invention describes a heat-sealable sheet-like textile structure with a carrier based on a woven fabric, knitted fabric, possibly with weft insertion, or a nonwoven and with an adhesive-bonding layer applied thereon in grid form, the adhesive-bonding layer containing a polymer material and at least one silane. This adhesive-bonding layer may be produced in the form of a spot of paste, a spot of powder or a double spot. In particular when this heat-sealable sheet-like structure is used for waterproofed items of clothing, a high level of adhesion along with a high level of water-tightness are thus achieved. This invention likewise describes a method of producing such a sheet-like structure.