Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Patent
1992-03-09
1993-08-24
Ryan, Patrick J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
4283171, 4289033, 238 1, 238 29, 238 83, B32B 300
Patent
active
052387348
ABSTRACT:
This invention relates to the use of rubber fragments from discarded tires in railroad ties. Such ties are made using rubber fragments which contain steel, polyester, or other strands or fibers, and which therefor are less expensive to prepare than fragments from which the reinforcing strands have been removed. These fragments are mixed with an epoxy mixture comprising an oxirane-containing resin and an amine-containing hardening agent. Test samples made using the materials described herein have excellent hardness, strength, durability, and nail-gripping characteristics.
REFERENCES:
patent: 2892592 (1959-06-01), Greene et al.
patent: 2977864 (1961-04-01), Pullar
patent: 3081035 (1963-03-01), Meyer
patent: 3801421 (1974-08-01), Allen
patent: 4244841 (1981-01-01), Frankland
Evans Elizabeth
Ryan Patrick J.
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