Heat-sealing of semicrystalline polymers with metals

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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156 735, 1562722, 1562733, 20415761, 2504921, 427558, 4284258, 428457, 428458, 428463, C08J 328, B29C 6506, B05D 306

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055004598

ABSTRACT:
Semicrystalline polymers are heat-sealed with metals under pressure and at a temperature between the glass transition temperature and the softening temperature of the polymer by prior exposure of the polymer surface to UV radiation produced by the decomposition of excimers in the wavelength range of from 120 to 400 nm and with an energy density below the ablation threshold.

REFERENCES:
patent: 3081485 (1963-03-01), Steigerwald
patent: 4822451 (1989-04-01), Ouderkirk et al.
patent: 4868006 (1989-09-01), Yorkgitis et al.
patent: 5032209 (1991-07-01), Shinbach et al.
Database WPI Derwent Publications, Ltd., AN 90-003344[01] (English abstract of JP-A-1 286 212). Also submitted--Patent Abstracts of Japan for same Japanese application.
J. of Applied Polymer Science, vol. 45, pp. 1679-1683, (1992).
H. Yokoya and R. S. Poster, J. Appl. Polymer Sci. 44 (1992), 1679-1683.

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