Wide microporous film
AssigneeCelgard, LLC
InventorsDavid Anzini, Ronnie E. Smith, Daniel R. Alexander
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Abstract
In one aspect, a wide microporous film comprises one or more layers comprising a polyolefin, wherein the microporous film has a width of at least 50 inches and comprises one or more non-porous regions. In some embodiments, the microporous film is at least 55 inches or at least 60 inches. Moreover, in some embodiments, the non-porous region is located along a creased region of the microporous film.
Claims35
1-34. (canceled)
A wide microporous film comprising:
- one or more layers comprising a polyolefin;
- wherein the microporous film has a width of at least 127 cm and comprises one or more non-porous regions.
A method of forming a wide microporous film comprising:
- providing a microporous film;
- and
- expanding width of the microporous film around a crease in the microporous film;
- and
- sealing the microporous film along the crease to provide one or more non-porous regions.
The method of claim 24, wherein the polyolefin comprises a polypropylene, a polypropylene blend, a polypropylene copolymer, a polyethylene, a polyethylene blend, a polyethylene copolymer, a polyvinylidene fluoride (PVDF), a polyethylene oxide (PEO), a poly(methyl methacrylate) (PMMA), or any combination thereof.
A wide microporous dry process membrane comprising:
- one or more layers comprising a folded dry stretch polyolefin membrane having a folded side and an open side;
- and,
- which when unfolded has a width of at least 101.6 cm and is adapted for use as at least one layer in a textile, garment, clothing, PPE, tent, awning, separator, diaper, cover, filter, automotive fabric, seat fabric, shoes, or the like.
Dependencies are inferred from the claim text.