Nonwoven laminate fabrics and processes of making same
First Claim
Patent Images
1. A nonwoven laminate fabric, comprising:
- first and second nonwoven webs; and
a nonwoven web of meltblown microfibers having a basis weight between about one and twenty grams per square meter sandwiched between and bonded to said first and second nonwoven webs to form a composite nonwoven fabric, said meltblown web comprising a plurality of thermoplastic microfine fibers having an average fiber diameter of less than 1.5 microns and comprising polypropylene having a melt flow rate of at least about or greater than 1,000.
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Accused Products
Abstract
A nonwoven laminate fabric includes first and second nonwoven webs formed of spunbonded substantially continuous filaments and a nonwoven web of meltblown microfibers having a basis weight between about one and twenty grams per square meter sandwiched between and bonded to the first and second nonwoven webs to form a composite nonwoven fabric. The meltblown web includes a plurality of thermoplastic microfine fibers having an average fiber diameter of less than 1.5 microns. The nonwoven laminate exhibits good barrier properties and can be used as a sterile wrap.
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Citations
36 Claims
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1. A nonwoven laminate fabric, comprising:
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first and second nonwoven webs; and a nonwoven web of meltblown microfibers having a basis weight between about one and twenty grams per square meter sandwiched between and bonded to said first and second nonwoven webs to form a composite nonwoven fabric, said meltblown web comprising a plurality of thermoplastic microfine fibers having an average fiber diameter of less than 1.5 microns and comprising polypropylene having a melt flow rate of at least about or greater than 1,000. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A sterile wrap formed of a laminate nonwoven fabric for wrapping about objects to be sterilized for use in subsequent applications requiring sterilized objects, comprising:
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first and second nonwoven webs formed of spunbonded substantially continuous filaments; a nonwoven web of meltblown microfibers having a basis weight between about one and twenty grams per square meter sandwiched between and bonded to said first and second nonwoven webs to form a composite nonwoven fabric, said meltblown web comprising a plurality of thermoplastic microfine fibers having an average fiber diameter of less than 1.5 microns and comprising polypropylene having a melt flow rate of at least about or greater than 1,000. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wrapped package of sterilizable objects comprising a sterile wrap wrapped about said sterilizable objects, said sterile wrap formed of a laminate nonwoven fabric comprising:
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first and second nonwoven webs formed of spunbonded substantially continuous filaments; and a nonwoven web of meltblown microfibers having a basis weight between about one and twenty grams per square meter sandwiched between and bonded to said first and second nonwoven webs to form a composite nonwoven fabric, said meltblown web comprising a plurality of thermoplastic microfine fibers having an average fiber diameter of less than 1.5 microns and comprising polypropylene having a melt flow rate of at least about or greater than 1,000. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A process for the manufacture of a nonwoven laminate fabric, the process comprising:
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forming a meltblown web comprising a plurality of thermoplastic microfine meltblown fibers having an average fiber diameter of less than 1.5 microns and comprising polypropylene having a melt flow rate of at least about or greater than 1,000, said meltblown web having a basis of weight between about one and twenty grams per square meter; sandwiching said meltblown nonwoven web between opposing nonwoven webs formed of spunbonded substantially continuous filaments to form a laminate fabric; and bonding said opposing nonwoven webs and said meltblown web together to form a coherent laminate fabric. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A process for the manufacture of a sterile wrap for wrapping about items to be sterilized for use in subsequent applications requiring sterilized items, the process comprising:
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forming a meltblown web comprising a plurality of thermoplastic microfine meltblown fibers comprising polypropylene having a melt flow rate of at least about or greater than 1,000, said microfibers having an average fiber diameter of less than 1.5 microns, said meltblown web having a basis of weight between about one and twenty grams per square meter; sandwiching said meltblown nonwoven web between opposing nonwoven webs formed of spunbonded substantially continuous filaments to form a laminate fabric; bonding said opposing nonwoven webs and said meltblown web together to form a coherent laminate fabric; and cutting said laminate fabric into a sheet having a predetermined shape and size.
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35. A process for preparing a wrapped package of sterilizable objects, comprising:
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placing sterilizable items onto a single layer of a sterile wrap formed of a laminate nonwoven fabric comprising a first and second nonwoven webs formed of spunbonded substantially continuous filaments and a nonwoven web of meltblown microfibers having a basis weight between about one and twenty grams per square meter sandwiched between and bonded to said first and second nonwoven webs to form a composite nonwoven fabric, said meltblown web comprising a plurality of thermoplastic microfine fibers comprising polypropylene having a melt flow rate of at least about or greater than 1,000, said microfibers having an average fiber diameter of less than 1.5 microns; and wrapping and securing the edges of said sterile wrap about said sterilizable items to form a sterile wrap package. - View Dependent Claims (36)
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Specification