Title: Film laminates having a reirradiated layer

Abstract: The seal strength, dimensional stability, bond strength between plies, and ink adhesion of certain film laminates may be significantly increased by irradiating the substrate, forming the laminate, and then irradiating the entire laminate whereas in the prior art the practice is to only irradiate the substrate layer prior to forming the laminate.

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Inventors: Kremkau, William P. (Watkinsville, GA, US)

Application Number: 580103
Filing Date: 1975-05-22
Publication_date: 1977-08-23
Assignee: W. R. Grace & Co. (Duncan, SC)
Primary Class(es): 428/212 138/118, 138/137, 138/141, 138/177, 156/272.2, 156/273.5, 427/496, 428/516, 428/518, 428/520, 522/153, 522/154
Other Classes:
US Patent Ref:

2907675	Oct, 1959	Gaylord	427/44.
3022543	Feb, 1962	Baird	260/91.
3741253	Jun, 1973	Brax et al.	138/141.
3821182	Jun, 1974	Baird et al.	260/91.

Other Refs:
Primary Examiner: Lusignan, Michael R.
Assistant Examiner:
Attorney: Toney; John J., Lee, Jr.; William D., Hardaway; John B.