Articles having composite member for inhibiting longitudinal stretch
An article may include a carcass or jacket, and at least one composite member arranged within the carcass or jacket for inhibiting longitudinal stretch of the article. The composite member may include a plurality of fibers arranged in a polymeric binder, the polymeric binder bonding the composite member to the carcass or jacket. The carcass or jacket may be formed substantially of rubber or thermoplastic elastomer. The plurality of fibers may include fibers formed substantially from at least one of S-glass, aramid and carbon fiber. The polymer binder may be formed substantially of a thermoplastic material or of a thermoset material. In manufacturing of the article, the carcass or jacket may be extruded to surround the composite member. The article may be a handrail or an elevator belt.
1. An article, comprising:
a carcass; and
at least one composite member arranged within the carcass for inhibiting longitudinal stretch of the article, the at least one composite member comprising a plurality of fibers arranged in a polymeric binder, the polymeric binder bonding the at least one composite member to the carcass,
wherein the at least one composite member is disposed along a central plane generally intermediate of the carcass so as to be positioned in a neutral plane during flexing.
2. The article of claim 1 , wherein the carcass is formed substantially of thermoplastic polyurethane.
3. The article of claim 2 , wherein the plurality of fibers comprises fibers formed substantially from at least one of S-glass, aramid and carbon fiber.
4. The article of claim 3 , wherein the polymeric binder is formed substantially of a thermoplastic material selected from a group consisting of thermoplastic polyester, polybutylene terephthalate, polyethylene terephthalate, engineered thermoplastic polyurethane and nylon.
5. The article of claim 3 , wherein the polymeric binder is formed substantially of a thermoset material selected from a group consisting of toluene diisocyanate (TDI) cured urethane, methylenediphenyl diisocyanate (MDI) cured urethane, reactive polyester, vinyl ester, epoxy, acrylic resin and modified acrylic resin.
6. The article of claim 1 , comprising a splice joint between two adjoining ends of the article, the splice joint comprising overlapping portions of the at least one composite member and an adhesive therebetween.
7. The article of claim 6 , wherein the overlapping portions comprise matching positive and negative tapered sections, and a ratio of a length of the tapered section and a thickness of the at least one composite member is at least 100:1.
8. The article of claim 1 , comprising a cover at least partially surrounding and bonded to the carcass, the carcass is formed of a first thermoplastic material, the cover is formed of a second thermoplastic material, and the first thermoplastic material is harder than the second thermoplastic material.
9. The article of claim 8 , wherein the article is a handrail.
10. The article of claim 9 , wherein the at least one composite member is arranged centered relative to a central width axis of the article, and side edges of the at least one composite member are offset inwardly in relation to side interior surfaces of the cover.