Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Reexamination Certificate
2005-07-26
2005-07-26
Mayes, Melvin (Department: 1734)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
C427S243000, C442S102000
Reexamination Certificate
active
06921508
ABSTRACT:
A method of preparation of microfibrous non-woven fabric of the suede-finish type comprising the steps of: spinning of a bi-component fiber of the “islands in the sea” type in which the “island” comprises a polymer chosen from among those employed in textile applications while the “sea” is a polymer that can dissolve and be removed by means of treatment with water, alkaline or acidic aqueous solutions, with non-polluting organic solvents alone or in aqueous solution; preparing a felt with the bi-component fiber; impregnating the felt with aqueous solution of polyvinylalcohol with reduced solubility in water; removing the “sea” component by treatment with solvents step; impregnating with emulsion or polyurethane dispersion; removing the polyvinylalcohol; and finishing the non-woven fabric obtained.
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Latini David
Romani Gianni
Alcantara S.p.A.
Mayes Melvin
Pauley Petersen & Erickson
LandOfFree
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