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US 2026/0021630 A1Published application
Angled film stretching
AssigneeMeta Platforms Technologies, LLC
InventorsArman Boromand, Sheng Ye, Nagi Hosni Elabbasi, Andrew John Ouderkirk
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Abstract
A method includes feeding a polymer sheet along a first machine direction through a first roller assembly, where an orientation of first rollers within the first roller assembly is angled with respect to the first machine direction and feeding the polymer sheet along a second machine direction through a second roller assembly, where an orientation of second rollers within the second roller assembly is angled with respect to the second machine direction.
Claims20
A method comprising:
- feeding a polymer sheet along a first machine direction through a first roller assembly, wherein an orientation of first rollers within the first roller assembly is angled with respect to the first machine direction;
- and
- feeding the polymer sheet along a second machine direction through a second roller assembly to form a stretched polymer sheet, wherein an orientation of second rollers within the second roller assembly is angled with respect to the second machine direction.
A method comprising:
- compacting a polymer material to form a sheet;
- feeding the sheet through a first roller assembly along a first machine direction, wherein rollers of the first roller assembly are oriented at an angle of 10° to 45° relative to the first machine direction, thereby applying a first tensile stress to the sheet;
- and
- feeding the sheet, after passing through the first roller assembly, through a second roller assembly along a second machine direction, wherein rollers of the second roller assembly are oriented at an angle of 10° to 45° relative to the second machine direction, the second machine direction being different from the first machine direction.
1 more element
A stretched polymer sheet comprising:
- ultra-high molecular weight polyethylene (UHMWPE) having a weight-averaged molecular weight of at least approximately 100,000 g/mol;
- a thickness of approximately 10 to 500 micrometers;
- a substantially uniform density and alignment of polymer chains throughout the sheet;
- visible light transmissivity of at least 85%;
- and
- bulk haze of less than 10%.
3 more elements
Dependencies are inferred from the claim text.