Process of providing tubular polymeric anticorrosion film

Details Process of providing tubular polymeric anticorrosion film Process of providing tubular polymeric anticorrosion film

1989-02-21

1990-04-03

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264129, 264173, 2642091, 264211, 4273935, B05D 726, B29C 5528

Patent

active

049138740

ABSTRACT:
A process of producing a tubular polymeric anticorrosion film which includes extrusion of a mixture of a thermoplastic polymer with a corrosion inhibitor in a liquid phase or with a solution thereof in a plastifying agent employed in an amount exceeding the limit of compatibility with the polymer, blowing this melt into a tubular film upon cooling, application of a layer of an enamel or a varnish incompatible with the thermoplastic polymer onto the external surface of the formed tubular film before the line of crystallization, which layer has a difference of the solubility parameters in respect of said corrosion inhibitor or a solution thereof in a plastifying agent of not more than 8.

REFERENCES:
patent: 3260776 (1966-07-01), Lindstrom, Jr. et al.
patent: 4124549 (1978-11-01), Hashiudo et al.
patent: 4605574 (1986-08-01), Yonehara et al.

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