JPWO2021059083A5 - - Google Patents

Claims (10)

an elongated core including a first material and a second material;
an outer layer comprising a foamable material and covering at least a portion of the outer surface of the elongated core;
Equipped with
the second material is configured to thermally bond to the outer layer during activation of the foamable material;
Push-in earplugs. The push-on earplug of claim 1, wherein the foamable material includes a foaming agent that increases the volume of the outer layer when activated. 3. The push-on earplug of claim 2, wherein the foaming agent comprises an unactivated expandable spherical foaming agent. 3. The push-on earplug of claim 2, wherein the foaming agent comprises an unactivated chemical foaming agent. Any one of claims 2 to 4, wherein the blowing agent is heat activated at a temperature that enables thermal bonding with the second material , the temperature being lower than the melting temperature of the first material. Push-in earplugs as described in section . A push-on earplug according to any one of claims 1 to 5 , wherein the first material also comprises an impact modifier. Push-on earplug according to any one of the preceding claims, wherein the first material and the second material are coextruded. Push-on earplug according to any of the preceding claims, wherein the outer layer is extruded onto the elongated core. a substrate comprising an extruded mixture of a first material and a second material;
an outer layer comprising a third material, the outer layer at least partially covering an outer surface of the substrate;
Equipped with
the third material includes an activatable blowing agent, the activatable blowing agent thermally bonding with the second material during activation;
Goods. 10. The article of claim 9 , wherein the blowing agent is configured to expand into the shape of a mold during activation.