Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1991-01-25
1993-01-05
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
135117, 156 85, 156160, 156229, 2642888, B31C 1300
Patent
active
051767740
ABSTRACT:
The invention provides a multilayer plastic sheet of self-rollable maerial comprising at least two layers of material joined to one another at states of different relative stretch and capable of alternating between a relaxed and a tensioned state and of inherently assuming a rolled-up configuration in said relaxed state as a result of the different states of stretch of the respective layers and to retain said inherent property of spontaneous rolling up even after prolonged exposure to sunlight and heat. The invention also provides a process for preparing a rollable sheet containing at least one layer of laminatable plastic material, said sheet being capable of alternating between a relaxed and a tensioned state and of inherently assuming a rolled up configuration in said relaxed state and retaining said inherent property of spontaneous rolling up even after prolonged exposure to sunlight and heat, said process comprising heating and stretching a first sheet of plastic material and laminating said first sheet of prestretched plastic material to a second sheet of non-stretched material, to form a self-rollable composite sheet.
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Har-El Moshe
Laniado Josephe
Amzel Viviana
Dixon Merrick
Roll Screens, Inc.
Simmons David A.
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