Bonding Polyolefin Textiles Using Chlorinated Primer and Waterborne Adhesive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for lower-cost, recyclable alternatives to high-performance polymers used in footwear and sporting equipment that offer improved mechanical properties and bonding capabilities, particularly for polyolefin materials which have traditionally suffered from poor mechanical properties and surface bonding issues.
Innovation Solution
The use of a method involving a chlorinated polyolefin primer and a waterborne polyurethane adhesive, combined with surface treatments like corona or plasma treatment, to enhance the bonding between polyolefin-containing textile components and other materials in footwear, such as foams or solid resins, achieving strong and durable adhesive bonds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyolefin materials are used as lower-cost alternatives to high-performance polymers, then cost is reduced, but bonding capability and mechanical properties deteriorate
Solution Approach 1:
The patent applies a silane-based primer as an intermediary substance between the polyolefin surface and the adhesive. The silane primer chemically bonds to the polyolefin through silane coupling and provides anchoring points for the adhesive, enabling reliable bonding of polyolefin materials while maintaining cost-effectiveness
Solution Approach 2:
The patent modifies the surface chemistry parameters of polyolefin by applying silane treatment, which changes the surface energy and chemical reactivity. This parameter change enables polyolefin materials to achieve bonding capabilities comparable to high-performance polymers without increasing material cost
2Strength
If conventional adhesives are used to bond polyolefin textiles, then manufacturing is simple, but adhesive bond strength deteriorates
Solution Approach 1:
The patent applies silane primer treatment to the polyolefin surface before adhesive application. This preliminary action modifies the surface chemistry to enhance adhesive bonding, achieving strong bonds while keeping the overall process relatively simple through a straightforward multi-step surface treatment and bonding sequence
Solution Approach 2:
The silane primer acts as a chemical intermediary that creates strong interfacial bonding between the polyolefin textile and the adhesive. This intermediary layer provides both chemical attachment to the polyolefin and compatibility with the adhesive system, significantly enhancing bond strength
3Reliability
If polyolefin materials are used for recyclability, then environmental sustainability is improved, but mechanical properties and surface bonding deteriorate
Solution Approach 1:
The silane primer serves as a mediator that enables reliable bonding of recyclable polyolefin materials without compromising their mechanical properties. This allows the use of environmentally friendly polyolefin materials while achieving the necessary bonding performance through surface modification rather than material substitution
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 method provides improved adhesive peel strength and durability, meeting the demanding requirements of the footwear market by creating strong bonds between polyolefin textiles and other components, enhancing the performance and longevity of footwear and sporting equipment.
Implementation Method 1
surface treatments like corona or plasma treatment
Implementation Method 2
surface treatments like corona or plasma treatment
Implementation Method 3
The use of a method involving a chlorinated polyolefin primer and a waterborne polyurethane adhesive
Implementation Method 4
a waterborne polyurethane adhesive, combined with surface treatments like corona or plasma treatment, to enhance the bonding between polyolefin-containing textile components and other materials
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 1E~1F
AI summary
Methods of bonding components are provided that provide for improved bonding when one or both of the components include a textile (314, 614) component (810, 820) including a polyolefin resin. Articles of footwear (110, 210, 310, 410, 610, 710), athletic apparel, sporting equipment, and portions thereof are also provided including the components, at least one of which includes a polyolefin textile (314, 614) component (810, 820), and the component (810, 820) are adhesively bonded together by methods and/or compositions described herein. Methods can include (i) applying (P039) a chlorinated polyolefin primer (830, 850) to a surface (811, 821) of the textile (314, 614) component (810, 820) to produce a primed surface (811, 821); (ii) applying (P039) a first waterborne polyurethane adhesive (840) to the primed surface (811, 821) to produce an adhesive surface (811, 821); and (iv) contacting a surface (811, 821) of the second component (810, 820) to the adhesive surface (811, 821) to adhesively bond the second component (810, 820) to the textile (314, 614) component (810, 820). In some aspects (1179, 180, 189), the textile (314, 614) component (810, 820) is an upper (112, 212, 312, 412, 612, 712) including an adhesive bond to a sole component (810, 820) such as a plate (116, 216, 316, 416, 500, 616).