Coated mining bolt
AssigneeTerrasimco Inc.
InventorsWalter John Simmons, Walter Neal Simmons
Life of this patent
Estimating the term…
Abstract
A mine support includes an elongate metal member and a coating comprising post-consumer recycled thermoplastic disposed on the member. The thermoplastic may include post-consumer recycled poly(ethylene terephthalate), and the coating may be an injection molded coating. A first layer of the coating may be provided with a thickness at least about 0.1 mm and a crystallinity between about 16% and about 30%, and a second layer of the coating may be provided with a thickness at least about 0.1 mm and a crystallinity between about 6% and about 14%. Either the first layer or second layer may contact the elongate metal member.
Claims3
1-75. (canceled)
A method of forming a mine roof support comprising:
- placing an elongate metal member in a mold, the member having a first temperature at an outer surface thereof;
- injecting polymer into the mold, an inner surface of the mold having a second temperature different from the first temperature;
- forming a first semi-crystalline layer of the polymer proximate the outer surface of the member;
- forming a first substantially amorphous layer of the polymer proximate the inner surface of the mold.
77-98. (canceled)
Dependencies are inferred from the claim text.