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US 6,150,020 AGranted
Articles exhibiting improved hydrophobicity
AssigneeBBA Nonwovens Simpsonville, Inc.
InventorsRahul K. Dharmadhikary, W. Andrew Coslett, Eric S. Gardiner
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AssigneeBBA Nonwovens Simpsonville, Inc.
InventorsRahul K. Dharmadhikary, W. Andrew Coslett, Eric S. Gardiner
Estimating the term…
The specification discloses polymeric articles such as fibers and fibrous webs which exhibit improved hydrophobicity and methods for making the articles. The articles comprise a polymer selected from the group consisting of polyolefins and polyesters and an additive of the structure R.sup.1 --A--Si(R.sup.2 R.sup.3)--O--(Si(R.sup.4 R.sup.5)--O)n--Si--(R.sup.6 R.sup.7)--A--R.sup.8, wherein R.sup.1 and R.sup.8 are selected from the group consisting of alkyl, aryl, alkylaryl groups and acyl and arylacyl derivatives of an aliphatic or aliphatic/aromatic mono-acid with a molecular weight of from about 250 to about 600 daltons, A is selected from the group consisting of --O--, --NH--C(O)--NH--(CH.sub.2).sub.3 --, and --C(O)--NH--(CH.sub.2).sub.3 --, R.sup.2, R.sup.3, R.sup.6 and R.sup.7 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and C.sub.4 H.sub.9, R.sup.4 and R.sup.5 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and (CH.sub.2).sub.I --C.sub.j F.sub.2j+1, wherein I is from 0 to 3 and j is an integer from I to 3, and n is an integer from 7 to 70.
A nonwoven web containing synthetic fibers which comprise a polymer selected from the group consisting of polyolefins and polyesters and an additive having the structure R.sup.1 --A--Si(R.sup.2 R.sup.3)--O--(Si(R.sup.4 R.sup.5)--O).sub.n --Si(R.sup.6 R.sup.7)--A--R.sup.8 wherein the R.sup.1 and R.sup.8 units are selected from the group consisting of alkyl, aryl, alkylaryl groups and acyl and arylacyl derivatives of an aliphatic or aliphatic/aromatic mono-acid with a molecular weight of from about 250 to about 600 daltons, A is selected from the group consisting of --O--, --NH--C(O)--NH--(CH.sub.2).sub.3 --, and --C(O)--NH--(CH.sub.2).sub.3 --, R.sup.2, R.sup.3, R.sup.6 and R.sup.7 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and C.sub.4 H.sub.9, R.sup.4 and R.sup.5 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and (CH.sub.2).sub.I --C.sub.j F.sub.2j+1, wherein I is from 0 to 3 and j is an integer from 1 to 3, and n is an integer from 7 to 70.
A method for making a nonwoven web which comprises mixing a polymer selected from the group consisting of polyolefins and polyesters with an additive having the structure R.sup.1 --A--Si(R.sup.2 R.sup.3)--O--(Si(R.sup.4 R.sup.5)--O).sub.n --Si(R.sup.6 R.sup.7)--A--R.sup.8 wherein R.sup.1 and R.sup.8 are selected from the group consisting of alkyl, aryl, alkylaryl groups and acyl and arylacyl derivatives of an aliphatic or aliphatic/aromatic mono-acid with a molecular weight of from about 250 to about 600 daltons, A is selected from the group consisting of --O--, --NH--C(O)--NH--(CH.sub.2).sub.3 --, and --C(O)--NH--(CH.sub.2).sub.3 --, R.sup.2, R.sup.3, R.sup.6 and R.sup.7 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and C.sub.4 H.sub.9, R.sup.4 and R.sup.5 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and (CH.sub.2).sub.I --C.sub.j F.sub.2j+1, wherein I is from 0 to 3 and j is an integer from 1 to 3, and n is an integer from 7 to 70, extruding the mixture through a spinnerette to form fibers, and forming the fibers into a nonwoven web.
A method for making web containing synthetic fibers which comprises providing a polymer selected from the group consisting of polyolefins and polyesters including an additive having the structure R.sup.1 --A--Si(R.sup.2 R.sup.3)--O--(Si(R.sup.4 R.sup.5)--O).sub.n --Si(R.sup.6 R.sup.7)--A--R.sup.8 wherein R.sup.1 and R.sup.8 are selected from the group consisting of alkyl, aryl, alkylaryl groups and acyl and arylacyl derivatives of an aliphatic or aliphatic/aromatic mono-acid with a molecular weight of from about 250 to about 600 daltons, A is selected from the group consisting of --O--, --NH--C(O)--NH--(CH.sub.2).sub.3 --, and --C(O)--NH--(CH.sub.2).sub.3 --, R.sup.2, R.sup.3, R.sup.6 and R.sup.7 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and C.sub.4 H.sub.9, R.sup.4 and R.sup.5 are selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, and (CH.sub.2).sub.I --C.sub.j F.sub.2j+1, wherein I is from 0 to 3 and j is an integer from 1 to 3, and n is an integer from 7 to 70, extruding the polymer to make fibers thereof and producing a web including the fibers.
Dependencies are inferred from the claim text.