Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1980-10-07
1983-12-13
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
15624413, 15624425, 2642092, 264312, 4251331, 425376B, 425381, B29F 310
Patent
active
044204515
ABSTRACT:
A high-strength laminate comprising generally weakly adhered biaxially oriented films, each formed of a blend which exhibits a distinct fibrous morphology with the fibres forming a distinct unidirectional grain when measured on a macro-scale but with the fibre-portions strongly deflected from this direction as seen on a micro-scale, the films being arranged in the laminate such that the unidirectional grain in at least two of the films criss-cross each other. This laminate is produced by melt attenuating the blend(s) while extruding the latter to films, cross-laminating the layers before or after solidification while they are still in molecularly unoriented state--except for the weak orientation produced by the melt-attenuation--and finally strongly biaxially orienting the laminate by stretching in several steps, whereby the stretching is generally uniaxial during each step.
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Daniel William J.
Thurlow Jeffery R.
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