Thermally fusible sheet body
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Solution Overview
Problem
Current adhesive compound technologies for interlining materials in the textile industry face challenges such as contamination, inhomogeneous dot formation, and poor performance in garment dyeing applications, especially with light and open backing layers, leading to weakened composites and increased production plant maintenance.
Innovation Solution
A thermally fusible textile fabric with a backing layer coated using a polyurethane mixture comprising polyester urethane, polyether urethane, and polycarbonate urethane, partially crosslinked with an isocyanate blocked with a blocking agent, which provides improved post-processing properties, reduced back-tacking, and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional adhesive compound technologies are used for coating interlining materials, then bonding efficiency is achieved, but contamination occurs and inhomogeneous dot formation results
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive compound by using a polyurethane mixture comprising polyester urethane, polyether urethane, and polycarbonate urethane with controlled molecular weights and ratios. This parameter optimization enables homogeneous dot formation and prevents contamination while maintaining bonding efficiency
Solution Approach 2:
The invention uses a composite polyurethane system combining three different urethane types (polyester, polyether, and polycarbonate) with specific weight ratios. This composite material approach provides synergistic effects that improve dot formation homogeneity, prevent contamination, and enhance overall bonding performance
2Strength
If light and open backing layers are used for interlining materials, then softness and wear resistance are improved, but adhesive compound penetration occurs leading to weakened composites
Solution Approach 1:
The patent optimizes the adhesive compound parameters including molecular weight distribution, polyol to isocyanate ratio, and curing conditions. These parameter changes control the viscosity and reactivity of the adhesive, preventing penetration into light and open backing layers while maintaining strong bonding and composite integrity
Solution Approach 2:
The polyurethane adhesive mixture acts as an intermediary layer between the outer fabric and the backing material. Its specifically formulated composition provides optimal adhesion to both surfaces without penetrating the backing layer, thus maintaining composite integrity while enabling use of light and open structures
3Strength
If thermoplastic polymers are used for adhesive compound activation, then thermal bonding is achieved, but back-tacking increases and chemical resistance decreases
Solution Approach 1:
The invention employs a composite polyurethane system combining polyester, polyether, and polycarbonate urethanes in specific ratios. This composite provides both thermal bonding capability and superior chemical resistance, eliminating the trade-off between bonding strength and chemical stability
Solution Approach 2:
The patent changes the chemical structure parameters of the adhesive by using polyurethane polymers with specific functional groups and molecular weights. The polyether component provides chemical resistance while the polyester and polycarbonate components contribute to bonding strength, achieving both properties simultaneously
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 solution achieves excellent washing resistance up to 95°C, maintains elasticity, and prevents contamination during application, resulting in a stable and durable interlining material with enhanced haptic performance and reduced production plant downtime.
Implementation Method 1
wherein the polyurethane mixture has been at least partially crosslinked with a crosslinker comprising at least one isocyanate blocked with a blocking agent at at least one isocyanate group
Implementation Method 2
The interlining is thus laminated to an outer fabric. The various textile fabrics mentioned have different property profiles depending on the production method.
Data Source
AI summary
A thermally fusible textile fabric usable as a fusible interlining material in the textile industry includes: a backing layer having a textile material on top of which has been applied an adhesive compound structure including a polyurethane coating containing a polyurethane mixture including at least one polyester urethane, at least one polyether urethane, and at least one polycarbonate urethane. The polyurethane mixture has been at least partially crosslinked with a crosslinker including at least one isocyanate blocked with a blocking agent at at least one isocyanate group.