Selectively applied adhesive particulate on nonmetallic substrates
The manufacturing of articles relies on the bonding of two or more components to form some forms of the articles, such as a shoe sole bonded with a shoe upper. The bonding may be achieved with an adhesive particulate that is applied to a surface of a substrate. The adhesive particulate is selectively fused to the substrate with a controlled energy source, such as a laser. The selective application of laser energy allows for specific geometric structures of adhesive particulate to be formed on the substrate. The substrate having the fused adhesive particulate is mated with another component allowing the fused adhesive particulate to bond the first substrate and the second component.
1. A nonmetallic component, the component comprising:
the component having a component surface;
an adhesive particulate contacting the component surface; and
the adhesive particulate forming a fused region and a second unfused region, wherein laser energy is selectively applied at a sufficient level to the adhesive particulate to fuse the adhesive particulate with the component in the fused region and wherein laser energy is selectively applied at an insufficient level to the adhesive particulate so that the adhesive particulate is not fused with the component in the unfused region, the fused region forming a perimeter enclosing the unfused region on the component surface.
2. The component of claim 1 , wherein the component is one of an article of footwear sole portion or an upper portion.
3. The component of claim 1 , wherein the component is formed from a material having a melting temperature within 150 degrees Celsius of a melting temperature of the adhesive particulate.
4. The component of claim 1 , wherein the fused region forming the perimeter enclosing the unfused region is between 50 millimeters and 3 centimeters wide.
5. The component of claim 1 , wherein the component is formed from a material selected from:
a thermoset material; or
a thermoform material.
6. The component of claim 5 , wherein the thermoset material is one of rubber, cross-linked polyolefin foam, thermoset polyurethane foam, and thermoset polyurethane elastomers.
7. The component of claim 1 , wherein the adhesive particulate is comprised of at least one selected from the following:
a thermoplastic polyurethane (“TPU”);
ethylene vinyl acetate (“EVA”); and
polyolefins.
8. The component of claim 7 , wherein the adhesive particulate is further comprised of an infrared doping agent.
9. The component of claim 7 , wherein the adhesive particulate has a state change between 60 degrees Celsius and 80 degrees Celsius.
10. A footwear component, the footwear component comprising:
the component having a foot-facing surface and comprising one of rubber, cross-linked polyolefin foam, thermoset polyurethane foam, and thermoset polyurethane elastomers;
an adhesive particulate contacting the component surface; and
the adhesive particulate forming a fused region and a second unfused region, wherein laser energy is selectively applied at a sufficient level to the adhesive particulate to fuse the adhesive particulate with the component in the fused region and wherein laser energy is selectively applied at an insufficient level to the adhesive particulate so that the adhesive particulate is not fused with the component in the unfused region, the fused region forming a perimeter enclosing the unfused region on the component surface.
11. The footwear component of claim 10 , wherein the adhesive particulate is comprised of a powdered adhesive.
12. The footwear component of claim 11 , wherein the powdered adhesive is comprised of at least one selected from the following:
a thermoplastic polyurethane (“TPU”);
ethylene vinyl acetate (“EVA”); and
polyolefins.
13. The footwear component of claim 10 , wherein after the selective application of laser energy, the unfused adhesive particulate in the unfused region is removed.
14. The footwear component of claim 13 , wherein a crosslinking material is applied to the fused adhesive particulate subsequent to removing the unfused adhesive particulate.
15. The footwear component of claim 13 , wherein thermal energy is applied to the fused region for bonding the footwear component with a second substrate subsequent to removing the unfused adhesive particulate.