Method of producing cross laminates

Details Method of producing cross laminates Method of producing cross laminates

1977-10-25

1981-01-06

Kittle, John E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264346, 428910, B29D 724, B32B 3102

Patent

active

042434637

ABSTRACT:
A method for improving the impact strength and other properties of monaxially oriented, thermoplastic polymeric film cross-laminates which comprises first forming the cross-laminate and then annealing it at an elevated temperature. The annealing may be carried out by passing the cross-laminate through an annealing oven or over a heated cylinder. Annealing temperatures can vary from 35.degree. C. to a temperature below the melting temperature of the lowest melting thermoplastic film, excluding any adhesive or extruded bonding layer. A particularly useful annealing temperature is within the range of 60.degree. to 180.degree. C.

REFERENCES:
patent: 2943356 (1960-07-01), Rasmussen
patent: 3409495 (1968-11-01), Rasmussen
patent: 3471353 (1969-10-01), Rasmussen
patent: 3496059 (1970-02-01), Rasmussen
patent: 3632726 (1972-01-01), Knox et al.
patent: 3679791 (1972-07-01), Reade

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