Method to separate and recover resin and steel pipe from resin-c

Details Method to separate and recover resin and steel pipe from resin-c Method to separate and recover resin and steel pipe from resin-c

1994-03-11

1996-04-30

El-Arini, Zeinab

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 5, 134 10, 134 19, 134 32, 134 16, 134 17, B08B 100, B08B 312, B08B 702

Patent

active

055121047

ABSTRACT:
In order to utilize separately steel pipe and coating resin as recycling resources, resin-coated steel pipe, which is produced by adhering a thermo-plastic coating resin on the surface of steel pipe with an adhesive, is heated by high-frequency induction heating to at least the melting temperature of the coating resin, and the coating resin is scraped off while the inner layer thereof is in a melted condition and the outer layer is in a softened condition. Coating resin and steel pipe can be recovered without the composition thereof being damaged. The scraping of coating resin is complete and efficient and requires only minimal energy since it occurs when the inner layer of the coating resin is in a melted condition and the outer layer is in a softened condition.

REFERENCES:
patent: 3236688 (1966-02-01), Kahn
patent: 3923653 (1975-12-01), Lavins, Jr.
patent: 3941087 (1976-03-01), Yazaki
patent: 4534801 (1985-08-01), Matsuoka et al.

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