Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.

Patentes

  1. Búsqueda avanzada de patentes
Número de publicaciónUSRE35621 E
Tipo de publicaciónConcesión
Número de solicitudUS 08/473,917
Fecha de publicación7 Oct 1997
Fecha de presentación7 Jun 1995
Fecha de prioridad30 May 1989
Número de publicación08473917, 473917, US RE35621 E, US RE35621E, US-E-RE35621, USRE35621 E, USRE35621E
InventoresA. Chandler Schmalz
Cesionario originalHercules Incorporated
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Cardable hydrophobic polypropylene fiber, material and method for preparation thereof
US RE35621 E
Resumen
A method for placing hydrophobic polyolefin fiber in condition for cutting, carding and production of nonwoven material without substantial sacrifice in desired hydrophobic properties in the corresponding nonwoven, by utilization of a sequential treatment of the fiber with a neutralized phosphoric acid ester and a polysiloxane of defined classes.
Imágenes(1)
Previous page
Next page
Reclamaciones(33)
I claim:
1. A method for preparing essentially hydrophobic polyolefin-containing spun fiber or filament for cutting and carding steps in the production of hydrophobic nonwoven material, comprising
A. initially treating corresponding continuous spun fiber or filament with an effective amount .Iadd.for fiber or filament processing to avoid difficulties generated by friction and accumulated static charge .Iaddend.of a first modifier composition comprising
(a) about 70%-100% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR3## wherein Alk is individually defined as a lower alkyl group,
R is defined as an amino group or an alkali metal,
n and m are individually defined as positive numbers of not less than . ˜!. 1, the sum of which is about 3; and
(b) up to about 30% by weight of modifier composition of at least one polysiloxane represented by the formula ##STR4## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number . .within the range.!. of .Iadd.at least .Iaddend.about 10 . .-50 or higher.!.;
B. crimping the resulting continuous fiber or filament in a crimper;
C. applying to said fiber or filament an effective amount .Iadd.for fiber or filament processing to avoid difficulties generated by friction and accumulated static charge .Iaddend.of a second modifier composition comprising
(a) about 70%-100%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2) and
(b) up to about 30%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1);
D. processing the resulting modifier-treated fiber or filament to obtain one or more webs for bonding; and
E. bonding the resulting web to obtain a desired hydrophobic nonwoven material.
2. The method of claim 1 wherein initial treatment of said continuous spun fiber or filament is effected using about 100%, by weight of first modifier composition, of at least one neutralized phosphoric acid ester represented in formula (1).
3. The method of claim 1 wherein the Alk-O group of the neutralized ester is defined as a straight 1-4 carbon alkoxy group; n is 2; and m is 1.
4. The method of claim 1 wherein the second modifier composition is topically applied upstream of said crimper.
5. The method of claim 1 wherein the second modifier composition is topically applied to an at least partially crimped continuous spun fiber or filament.
6. The method of claim 1 wherein the "D" processing step comprises a fiber cutting and carding operation.
7. The method of claim 1 wherein the "D" "E" steps comprise a spun bonding operation.
8. A . .Crimped.!. .Iadd.crimped .Iaddend.essentially hydrophobic polyolefin-containing fiber obtained by
A. initially treating corresponding continuous spun fiber or filament with an effective amount .Iadd.for fiber or filament processing to avoid difficulties generated by friction and accumulated static charge .Iaddend.of a first modifier composition comprising
(a) about 70%-100% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR5## wherein Alk is individually defined as a lower alkyl group,
R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than . ˜!. 1, the sum of which is about 3; and
(b) up to about 30% by weight of modifier composition of at least one polysiloxane represented by the formula ##STR6## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number . .within the range.!. of .Iadd.at least .Iaddend.about 10 . .-50 or higher.!.;
B. crimping and applying to said fiber or filament an effective amount .Iadd.for fiber or filament processing to avoid difficulties generated by friction and accumulated static charge .Iaddend.of a second modifier composition comprising
(a) about 70%-100%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2), and
(b) up to about 30%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula . .(I).!. .Iadd.(1).Iaddend..
9. The fiber of claim 8 wherein initial treatment of said continuous spun fiber or filament is effected using about 100%, by weight of first modifier composition, of at least one neutralized phosphoric acid ester represented in formula (1).
10. The fiber of claim 8 wherein the Alk-O group of the neutralized ester is defined as a straight 1-4 carbon alkoxy group; n is 2; and m is 1.
11. The fiber of claim 10 wherein the second modifier composition is topically applied upstream of said crimper.
12. The fiber of claim 9 wherein the second modifier composition is topically applied to an at least partially crimped continuous spun fiber or filament.
13. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 1.
14. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 2.
15. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 3.
16. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 4.
17. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 5.
18. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 6.
19. A nonwoven material . .obtained in accordance with.!. .Iadd.produced by the method recited in .Iaddend.claim 7. .Iadd.
20. The method of claim 1, wherein o is defined as a positive number of about 10 to 50. .Iaddend..Iadd.21. The fiber of claim 8, wherein o is
defined as a positive number of about 10 to 50. .Iaddend..Iadd.22. The method for preparing essentially hydrophobic polyolefin-containing fiber or filament, comprising:
treating continuous polyolefin-containing fiber or filament with a first composition comprising at least one neutralized phosphoric acid ester represented by the formula ##STR7## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than 1, the sum of which is about 3;
crimping the polyolefin-containing fiber or filament subsequent to treatment with the first composition; and
treating the crimped polyolefin-containing fiber or filament with a second composition comprising at least one neutralized phosphoric acid ester represented by the formula ##STR8## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than 1, the sum of which is about 3.
.Iaddend..Iadd.23. The method according to claim 22, wherein said first composition further comprises at least one polysiloxane. .Iaddend..Iadd.24. The method according to claim 23, wherein said at least one polysiloxane comprises at least one polysiloxane represented by the formula ##STR9## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number of at least about 10. .Iaddend..Iadd.25. The method according to claim 24, wherein o is defined as a positive
member of about 10 to 50. .Iaddend..Iadd.26. The method according to claim 24, wherein the treating comprises applying from about 0.09% to 0.5% of the first composition based on the weight of the fiber or filament. .Iaddend..Iadd.27. The method according to claim 22, wherein said second composition further comprises at least one polysiloxane. .Iaddend..Iadd.28. The method according to claim 27, wherein said at least one polysiloxane comprises at least one polysiloxane represented by the formula ##STR10## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number of at least about 10. .Iaddend..Iadd.29. The method according to claim 28, wherein the treating the continuous polyolefin-containing fiber or filament with a first composition comprises applying from about 0.09% to 0.5% of the composition based on the weight of the fiber or filament, and the treating the crimped polyolefin-containing fiber or filament with a second composition comprises applying from about 0.05% to 0.20% of the second composition based on the weight of the fiber or filament. .Iaddend..Iadd.30. The method according to claim 27, further comprising processing the polyolefin-containing fiber or filament subsequent to treatment with the second composition to obtain at least one web, and bonding the at least one web to obtain a hydrophobic nonwoven material. .Iaddend..Iadd.31. The method according to claim 22, further comprising processing the polyolefin-containing fiber or filament subsequent to treatment with the second composition to obtain at least one web, and bonding the at least
one web to obtain a hydrophobic nonwoven material. .Iaddend..Iadd.32. The method according to claim 22, wherein the treating comprises applying from about 0.09% to 0.5% of the first composition based on the weight of the fiber or filament. .Iaddend..Iadd.33. The method according to claim 22, wherein the treating the continuous polyolefin-containing fiber or filament with a first composition comprises applying from about 0.09% to 0.5% of the composition based on the weight of the fiber or filament, and the treating the crimped polyolefin-containing fiber or filament with a second composition comprises applying from about 0.05% to 0.20% of the second composition based on the weight of the fiber or filament.
.Iaddend..Iadd.34. An essentially hydrophobic polyolefin-containing fiber or filament, comprising:
polyolefin-containing fiber or filament including a coating comprising at least one neutralized phosphoric acid ester represented by the formula ##STR11## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than 1, the sum of which is about 3.
.Iaddend..Iadd.35. The fiber or filament according to claim 34, wherein said coating further comprises at least one polysiloxane.
.Iaddend..Iadd. . The fiber or filament according to claim 35, wherein said at least one polysiloxane comprises at least one polysiloxane represented by the formula ##STR12## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number of at least about 10. .Iaddend..Iadd.37. The fiber or filament according to claim 36, wherein o is defined as a positive number of about 10 to 50. .Iaddend..Iadd.38. The fiber or filament according to claim 35, wherein said fiber or filament is crimped.
.Iaddend..Iadd.39. A nonwoven material comprising the fibers of claim 35. .Iaddend..Iadd.40. The fiber or filament according to claim 34, wherein said fiber or filament is crimped. .Iaddend..Iadd.41. A nonwoven material
comprising the fibers of claim 34. .Iaddend..Iadd.42. A method for preparing essentially hydrophobic polyolefin-containing spun fiber or filament for cutting and carding steps in the production of hydrophobic nonwoven material, comprising
A. initially treating corresponding continuous spun fiber or filament with from about 0.09% to 0.5% based on the weight of the fiber or filament of a first modifier composition comprising
(a) about 70%-100% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR13## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than 1, the sum of which is about 3; and
(b) up to about 30% by weight of modifier composition of at least one polysiloxane represented by the formula ##STR14## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number of at least about 10;
B. crimping the resulting continuous fiber or filament in a crimper;
C. applying to said fiber or filament from about 0.05% to 0.20% based on the weight of the fiber or filament of a second modifier composition comprising
(a) about 70%-100%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2), and
(b) up to about 30%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1);
D. processing the resulting modifier-treated fiber or filament to obtain one or more webs for bonding; and
E. bonding the resulting web to obtain a desired hydrophobic nonwoven
material. .Iaddend..Iadd.43. A crimped essentially hydrophobic polyolefin-containing fiber obtained by
A. initially treating corresponding continuous spun fiber or filament with from about 0.09% to 0.5% based on the weight of the fiber or filament of a first modifier composition comprising
(a) about 70%-100% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR15## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than 1, the sum of which is about 3; and
(b) up to about 30% by weight of modifier composition of at least one polysiloxane represented by the formula ##STR16## wherein X and Y are defined as hydrophobic chemical end groups,
R' is individually defined as a lower alkyl group, and
o is defined as a positive number of at least about 10;
B. crimping and applying to said fiber or filament from about 0.05% to 0.20% based on the weight of the fiber or filament of a second modifier composition comprising
(a) about 70%-100%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2), and
(b) up to about 30%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1). .Iaddend.
Descripción

.Iadd.This application is a continuation of application Ser. No. 07/909,188, filed Jul. 6, 1992, now abandoned. .Iaddend.

The present invention relates to a method utilizing topically applied modifier compositions arranged in sequence and in a unique arrangement whereby polyolefin-containing hydrophobic fiber or filament is made receptive to interim cutting and carding operations without loss of hydrophobicity in the resulting fiber or nonwoven product.

BACKGROUND

While the manufacture of polyolefin-based fiber, webs and corresponding nonwoven materials are well known in the textile art, attempts to broadly apply such knowledge to produce products in the area of personal hygiene, such as catamenial devices, disposable diapers, incontinence pads and the like, have met with serious technical problems.

In general, such products must have a fluid-absorbent core, usually comprising one or more layers of absorbent material such as wood pulp, rayon, gauze, tissue and the like and, in some cases, synthetic hydrophilic material such as a hydrophilic polyurethane foam.

Such fluid-absorbing core is most generally fabricated in the form of a thermally bonded pad, of wood pulp, fiber and conjugate fiber, having a rectangular or somewhat oval shape. To protect a wearer's clothing, and surrounding areas from stain or wetting by fluids already absorbed in such a core, a fluid-impervious barrier sheet is usually required. In general, the absorbent device is positioned against the body of the user with hydrophilic material facing and contacting the body and the fluid impervious barrier sheet positioned on the outside or opposite side.

A particularly troublesome technical problem arises when a high degree of hydrophobicity is desired in a nonwoven component produced substantially from conventionally bonded webs of hydrophobic fiber such as polyolefin-containing staple or spun-bonded webs.

In general, untreated hydrophobic fiber quickly becomes unworkable due to friction and accumulated static charge generated during conventional spinning, cutting and carding operations. For this reason, the art has long recognized and used a variety of topically applied antistatic agents which change fiber surface properties sufficiently to permit such conventional fiber processing. In effect, however, such treatment also produces fiber, web and nonwoven product which is substantially more hydrophilic than the untreated spun fiber.

Because of the nature of commercial high speed operations, and the somewhat unpredictable affinity of such agents to individual batches or bales of hydrophobic fiber, it becomes very difficult to maintain adequate control over bonding steps and over the wetting characteristics of the final nonwoven product.

It is an object of the present invention to prepare a hydrophobic polyolefin-containing spun fiber or filament for processing such as intermediate cutting and carding steps without unduly interfering with subsequent bonding steps or sacrificing needed hydrophobic characteristics in the nonwoven product.

THE INVENTION

The above objects are obtained in accordance with the present invention by preparing polyolefin-containing spun fiber or filament in accordance with the steps of

A. initially treating the corresponding continuous spun fiber or filament with an effective amount, varying from about0.09%-0.5% based on fiber weight, of a first modifier composition comprising

(a) about 70%-100% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR1## wherein Alk is individually defined as a lower alkyl group, such as a 1-8 carbon alkyl and preferably a 1-4 carbon alkyl group;

R is defined as an amino group or an alkali metal,

n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3; and

(b) up to about 30% by weight of modifier composition of at least one polysiloxane represented by the formula ##STR2## wherein X and Y are individually defined as a hydrophobic chemical end group such as a lower alkyl group;

R' is individually defined as a lower alkyl such as a methyl group, and

o is defined as a positive number within the range of about 10-50 or higher;

B. crimping the resulting continuous fiber or filament in a crimper;

C. applying to said continuous fiber or filament preferably at a point proximate to said crimper an effective amount, varying from about 0.05%-0.20% by fiber weight, of a second modifier composition comprising

(a) about 70%-100%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2), and

(b) up to about 30%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1);

D. processing the resulting modifier-treated continuous fiber or filament, for spun bonding or for staple web bonding purposes, to obtain position one or more webs for bonding; and

E. bonding the resulting web in a conventional manner to obtain a desired hydrophobic nonwoven material.

For present purposes the term "polyolefin-containing spun fiber or filament" includes continuous as well as staple melt spun fibers which are obtainable from conventionally blended isotactic polypropylene as well as art-recognized hydrophobic copolymers thereof with ethylene, 1-butene, 4-methylpentene-1 and the like. The resulting blended . .an.!. .Iadd.and .Iaddend.extruded spun melt conveniently has a weight average varying from about 3 distribution of about 5.0-8.0, a melt flow rate of about 2.5 to about 4.0 g/10 minutes, and a spin temperature conveniently within a range of about 220

Also includible within the spun melt are various art-recognized fiber additives, including pH stabilizers such as calcium stearate, antioxidants, pigments, including whiteners and colorants such as TiO.sub.2 and the like. Generally such additives vary, in amount, from about 0.5%-3% by weight of spun melt.

The present invention is found particularly applicable to high speed production of a variety of nonwoven materials utilizing webs obtained, for instance, from spun bonded or carded staple and may also comprise additional web components such as . .fabricated.!. .Iadd.fibrillated .Iaddend.film and the like. In each case, the fiber-handling difficulties generated by friction and accumulated static charge can be avoided, without unacceptable sacrifice in bonding characteristics (i.e. strength) or loss of hydrophobic properties of the final nonwoven product.

In this regard, the term "processing" as applied in process step "D" is inclusive of art recognized web formation techniques applicable to continuous as well as crimped, cut and carded staple fiber, the crimping step in the former case being optional with respect to webs formed solely of fiber or filament.

Continuous spun fiber or filaments used to form webs within the scope of the present invention preferably comprise topically treated spun melt staple fiber, filament or fibrillated film of bicomponent or monofilament types, the above-defined modifier compositions being conventionally drawn over a feed wheel partially immersed in a bath of the above-defined modifier composition, dipped therein, or sprayed in effective amount for fiber processing, and dried.

For present purposes, webs used to form nonwovens within the scope of the present invention can be formed by spun bonded, melt blown or conventional "Dry" carded Process using staple fiber and bonded together using techniques employing adhesive binders (U.S. Pat. No. 4,535,013), calender rolls, hot air, sonic, laser, pressure bonding, needle punching and the like, known to the art.

Webs used to fabricate nonwoven material can also usefully comprise conventional sheath/core or side-by-side bicomponent fiber of filament, alone or combined with treated or untreated homogeneous type fiber or filament and/or fibrillated film.

Also within the scope of the present invention is the use of nonwovens comprised of one or more bonded webs of modifier-treated polyolefin fiber and/or fiber-like (fibrillated film) components having a mixed fiber denier of homogeneous and/or bicomponent types not exceeding about 40 dpf. Such webs preferably utilize fiber or filaments within a range of about 0.1-40 dpf.

In addition, the resulting nonwoven material can be embossed and/or calender printed conventionally with various designs and colors, as desired, to increase loft, augment wet strength, and provide easy market identification.

In addition, webs used in forming nonwovens within the scope of the present invention are produced from one or more types of conventionally spun fibers or filaments having, for instance, round, delta, . .trifocal.!. .Iadd.trilobal.Iaddend., or diamond cross sectional configurations.

Nonwoven cover stock of the above defined types can usefully vary in weight from about 10-45 gm yd.sup.2 or higher.

The invention is further illustrated but not limited by the following Examples and Tables:

EXAMPLE 1

A. Polypropylene in flake form and characterized as follows: (crystallinity 60% M.sub.w 3.5.times.10.sup.5, molecular weight distribution 6.4, and melt flow 3.2 g/10 minutes) is mixed in an impact blender. After thorough blending, the mixture is fed into a 11/2 extruder and spun through a 210 hole spinnerette at 280 115 then passed over a feed or kiss wheel partly immersed in a tank of first modifier composition consisting of a 50% aqueous solution of Lurol AS-Y.sup.(*1), a neutralized phosphoric acid/alcohol ester, contact being of sufficient duration and speed to topically apply about 0.6 wt. % of the dried composition. The resulting continuous filament is crimped at about 100 composition consisting of a 20:1 mixture by weight of a 60% polydimethyl siloxane emulsion commercially available as LE-458HS.sup.(*2) and a 50% aqueous solution of Lurol AS-Y. After air drying, the coated 2.0 dpf fiber is chopped to 1.5" length staple and set aside for conventional ASTM Sink Time tests in which a given weight of fiber is loosely packed into a mesh basket and the sink time measured in seconds. The remainder is carded into webs weighing about 20 g/yd.sup.2, two webs being calender bonded at 162 into strips of convenient dimensions for carrying out conventional strength and run off tests using syn urine.sup.(*3) as the wetting fluid. Test results, are summarized and reported in Tables I and II.

                                  TABLE I__________________________________________________________________________STAPLE PROPERTIESColor     Degree of  Percent Finish                          Tenacity                               Elongation                                       Spin Fin.                                             Over Fin.Sample #Type Hydrophobicity*.sup.4             MFR                Tow                   Staple                       DPF                          gms  %    CPI                                       Type/AMT                                             Type/AMT__________________________________________________________________________S-1  195  5       17.6                0.77                   0.41                       2.6                          2.05 308.7                                    28.9                                       263/0.6                                             262/0.3S-2  187  5       35.7                0.31                   0.49                       2.0                          --   --   -- 263/0.2                                             262/0.3S-3  195  5       24.3                0.15                   --  2.2             263/0.2                                             262/0.15*.sup.5S-4  187  5       21.7                0.48                   0.48                       2.43                          1.68 402.0                                    25.1                                       263/0.2                                             262/0.3Lt. BlueS-5  187  5       22.2                0.25                   0.38                       2.54                          1.72 424.8                                    28.5                                       263/0.2                                             262/0.3Med. BlueS-6  195  5       21.0                0.5                   0.53                       2.28                          1.91 375.1                                    26.0                                       263/0.4                                             262/0.3S-7  195  5       21.0                0.5                   0.51                       2.38                          1.86 373.8                                    21.5                                       263/0.4                                             262/0.3*.sup.6S-8  195  5       21.0                0.5                   0.48                       2.45                          2.10 411.4                                    22.8                                       263/0.4                                             262/0.3*.sup.7S-9  195  5       21.0                0.5                   0.60                       2.43                          1.91 363.0                                    22.1                                       263/0.4                                             262/0.3*.sup.8S-10 195  5       21.0                0.5                   0.61                       2.50                          1.93 361.5                                    20.5                                       263/0.4                                             262/0.3*.sup.9S-11 187  5          0.42                   --  -- --   --   30.8                                       263/0.4                                             262/0.3Lt. BlueS-12 187  5          0.45                   --  -- --   --   30.8                                       263/0.4                                             262/0.3Med. BlueS-13 195  5       22.3                0.35                   0.4 2.42                          1.87 273.9                                    27.5                                       263/0.4                                             262/0.15S-14 187  5       19.8                0.47                   0.52                       2.36         21.3                                       263/0.4                                             262/0.3BlueS-15 187  5       20.9                0.56                   0.53                       2.42                          1.80 297.0                                    27.8                                       263/0.4                                             262/0.3Blue 225S-16 187  5       20.8                0.44                   0.48                       2.13                          1.92 347.0                                    26.3                                       263/0.4                                             262/0.3Blue 275__________________________________________________________________________ *.sup.4 1 = Fully Hydrophilic 5 = Fully Hydrophobic based on Fiber Sink Test. *.sup.5 Added Finish No. 262 to tow with kim roll to reduce static. Total 262 addon not known. *.sup.6 Finish No. 262 + 0.08 Lurol ASY; *.sup.7 Extra (0.24) Lurol ASY: *.sup.8 Extra 0.32 Lurol ASY. *.sup.9 Extra 0.72 Lurol ASY

                                  TABLE II__________________________________________________________________________THERMOBONDED WEBBond     Bond Line Speed               Strength g/in.*.sup.10                       Elongation %*.sup.10                               Run-Off                                   Rewet                                       Strike TimeStaple    Temp.     Press. Pli         ft./min.               MD  CD  MD  CD  %   gms.                                       sec.__________________________________________________________________________S-1 165  160  250   930 271 43  86  98.3                                   *.sup.11                                       *.sup.11S-2 160  160  250   892 288 27  70  99.3                                   *.sup.11                                       *.sup.11S-3 157.5    160  100   1294                   325 30  77  97.3                                   *.sup.11                                       *.sup.11S-4 160  160  250   1716                   339 50  101 91.2                                   *.sup.11                                       *.sup.11S-5 155  160  100   1500                   423 37  87  94.7                                   *.sup.11                                       *.sup.11S-6 155  160  100   1463                   310 27  70  95.9                                   0.105                                       *.sup.11S-7 155  160  100   1345                   292 27  76  95.0                                   0.120                                       *.sup.11S-8 155  160  100   1188                   285 23  78  97.1                                   0.111                                       *.sup.11S-9 155  160  100   1325                   255 28  70  94.1                                   0.102                                       *.sup.11S-10    155  160  100   1391                   220 29  73  98.8                                   0.147                                       *.sup.11S-11    152.5    160  100   1244                   257 31  71  93.0                                   *.sup.11                                       *.sup.11S-12    152.5    160  100   1389                   294 37  80  95.2                                   *.sup.11                                       *.sup.11S-13    150  160  100   *.sup.12                   *.sup.12                       *.sup.12                           *.sup.12                               91.5                                   *.sup.11                                       *.sup.11S-14    157.5    160  100   1944                   533 34  78  95.0                                   *.sup.11                                       *.sup.11S-15    157.5    160  --    *.sup.12                   *.sup.12                       *.sup.12                           *.sup.12                               94.9                                   *.sup.11                                       *.sup.11S-16    157.5    160  100   1347                   392 26  80  >90.0                                   *.sup.11                                       *.sup.11__________________________________________________________________________ *.sup.10 20 g/yd.sup.2 Wet *.sup.11 Could not test. Solution remained on surface of fabric in Run Of Test (fully hydrophobic) *.sup.12 No determination run.
Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US3009830 *15 Mar 196021 Nov 1961Hercules Powder Co LtdFinishing polyolefin filamentary textile article and the article obtained therefrom
US3341451 *1 Mar 196512 Sep 1967Courtaulds LtdTextile processing agents
US3377181 *19 Nov 19639 Abr 1968Sanyo Chemical Ind LtdMethod for producing webs including polypropylene fibers
US3423314 *19 Ene 196621 Ene 1969Dow CorningAntistatic lubricant as a process finish for synthetic fibers
US3433008 *19 Nov 196518 Mar 1969Du PontBulked yarn
US3544462 *2 May 19671 Dic 1970Du PontHigh temperature resistant textile fiber finish composition
US3652419 *6 Mar 196828 Mar 1972Witco Chemical CorpAntistatic fiber lubricant
US3821021 *29 Feb 197228 Jun 1974Du PontAntistatically protected nonwoven polyolefin sheet
US3919097 *6 Sep 197411 Nov 1975Union Carbide CorpLubricant composition
US3926816 *23 Jul 197316 Dic 1975Goulston Co George ATextile fiber lubricants
US3983272 *24 Ene 197528 Sep 1976Wacker-Chemie GmbhMethod for improving the lubricating properties and imparting antistatic properties to organic fibers
US4058489 *15 May 197515 Nov 1977Berol Kemi AbDetergent composition having textile softening and antistatic effect
US4069159 *2 Feb 197617 Ene 1978E. I. Du Pont De Nemours And CompanyAntistat and softener for textiles
US4069160 *20 Ene 197517 Ene 1978Hoechst Fibers Industries, Division Of American Hoechst CorporationTexturing finish for synthetic filaments
US4072617 *12 Abr 19767 Feb 1978Dow Badische CompanyFinish for acrylic fiber
US4082887 *14 May 19764 Abr 1978E. I. Du Pont De Nemours And CompanyCoating composition for a fibrous nonwoven sheet of polyolefin
US4105567 *4 Ene 19778 Ago 1978Th. Goldschmidt AgOrganosilicon compounds and textile fiber finishes containing them
US4105569 *7 Feb 19778 Ago 1978George A. Goulston Co., Ltd.Yarn finish formulation
US4137181 *22 Jul 197730 Ene 1979Hoechst Fibers IndustriesStaple fiber, finish therefor and process for use of same
US4143206 *16 Sep 19776 Mar 1979Ciba-Geigy CorporationMethod of finishing synthetic organic fibrous material, in particular of providing it with an antistatic finish
US4179543 *19 Ago 197618 Dic 1979Hoechst Fibers Industries, Division Of American Hoechst CorporationStaple fiber, finish therefor and process for use of same
US4273600 *26 Jul 197916 Jun 1981Brown & Williamson Tobacco CorporationBonding fibrillated polypropylene smoke filter with ethylene-vinylacetate emulsion
US4283292 *12 Dic 197911 Ago 1981Allied Chemical CorporationSoil resistant yarn finish for synthetic organic polymer yarn
US4285748 *26 Dic 197925 Ago 1981Fiber Industries, Inc.Selfbonded nonwoven fabrics
US4291093 *5 Oct 197922 Sep 1981Phillips Petroleum Co.Stabilized polyolefin substrate overcoated with an ethoxylated lubricant and a phosphate ester
US4294883 *17 Ago 197913 Oct 1981Hoechst Fibers Industries, Div. Of American Hoechst CorporationStaple fiber, finish therefor and process for use of same
US4306929 *1 Dic 198022 Dic 1981Monsanto CompanyProcess for point-bonding organic fibers
US4369134 *2 Feb 198118 Ene 1983Kao Soap Co., Ltd.Creamy cleansing compositions
US4423092 *9 Dic 198127 Dic 1983Wacker-Chemie GmbhLubricating compositions for organic fibers
US4511489 *1 Jun 198316 Abr 1985The Drackett CompanyComposition for cleaning and imparting antistatic properties to plastics surfaces
US4535013 *15 Ago 198313 Ago 1985Hercules IncAddition of resins to latex bonded nonwoven fabrics for improved strength
US4624793 *20 Jun 198425 Nov 1986National Distillers And Chemical CorporationFiber finishes
US4705704 *12 Ene 198710 Nov 1987General Electric CompanyNovel aminofunctional polysiloxane emulsions for treating textiles
US4717507 *5 May 19865 Ene 1988Henkel Kommanditgesellschaft Auf AktienLiquid detergent with fabric softening properties
US4816336 *2 Abr 198728 Mar 1989Hoechst Celanese CorporationSynthetic fiber having high neutralized alkyl phosphate ester finish level
US4837078 *17 Dic 19876 Jun 1989Hercules IncorporatedWet/dry wipes
US4965301 *7 Mar 198823 Oct 1990Phillips Petroleum CompanyStabilization of polyolefins
US4995884 *8 Dic 198926 Feb 1991Henkel CorporationPolyalphaolefin emulsions for fiber and textile applications
US5033172 *1 Jun 198923 Jul 1991Hercules IncorporatedRewettable polyolefin fiber and corresponding nonwovens
US5045387 *28 Jul 19893 Sep 1991Hercules IncorporatedRewettable polyolefin fiber and corresponding nonwovens
US5232742 *15 May 19923 Ago 1993Bridgestone/Firestone, Inc.Spin finish composition
UST917002 *15 Jun 19724 Dic 1973 Defensive publication
DE1494751A1 *18 Jul 196430 Oct 1969Toyo Rayon Co LtdVerfahren zum Vorspinnen von Polypropylenfasern
EP0010764A2 *2 Nov 197914 May 1980Phillips Petroleum CompanyPolypropylene yarn product of improved stability and method for preparing a textile material
EP0400622A2 *30 May 19905 Dic 1990Hercules IncorporatedRewettable polyolefin fiber and corresponding nonwovens
EP0486158A2 *16 Oct 199120 May 1992Hercules IncorporatedCardable hydrophobic polyolefin fiber, material and method for preparation thereof
FR2259938A1 * Título no disponible
FR2351152A1 * Título no disponible
GB828735A * Título no disponible
GB999199A * Título no disponible
GB1246134A * Título no disponible
GB1533359A * Título no disponible
Otras citas
Referencia
1 *Derwent Abstract of JP 82 002828.
2 *Derwent Abstract of JP 87 047989.
3 *Derwent Abstract of JP 87 052072.
4George A. Goulston Company, Technical Data Report, entitled "Lurostat AS-Y Anionic Antistatic Agent".
5 *George A. Goulston Company, Technical Data Report, entitled Lurostat AS Y Anionic Antistatic Agent .
6 *Kirk Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 22, 1983 (John Wiley & Sons) pp. 359 361.
7Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 22, 1983 (John Wiley & Sons) pp. 359-361.
8 *Zimmerman et al., Supplement IV to the 1953 Edition of Handbook of Material Trade Names, p. 126.
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US629693630 Ene 19982 Oct 2001Kimberly-Clark Worldwide, Inc.Coform material having improved fluid handling and method for producing
US630025827 Ago 19999 Oct 2001Kimberly-Clark Worldwide, Inc.Nonwovens treated with surfactants having high polydispersities
US643227020 Feb 200113 Ago 2002Kimberly-Clark Worldwide, Inc.Soft absorbent tissue
US651158015 Nov 200128 Ene 2003Kimberly-Clark Worldwide, Inc.Soft absorbent tissue containing derivitized amino-functional polysiloxanes
US651438315 Nov 20014 Feb 2003Kimberly-Clark Worldwide, Inc.Soft absorbent tissue containing derivitized amino-functional polysiloxanes
US657608715 Nov 200110 Jun 2003Kimberly-Clark Worldwide, Inc.Soft absorbent tissue containing polysiloxanes
US658255815 Nov 200124 Jun 2003Kimberly-Clark Worldwide, Inc.Soft absorbent tissue containing hydrophilic polysiloxanes
US659939315 Nov 200129 Jul 2003Kimberly-Clark Worldwide, Inc.Soft absorbent tissue containing hydrophilically-modified amino-functional polysiloxanes
US668267228 Jun 200227 Ene 2004Hercules IncorporatedProcess for making polymeric fiber
US74387771 Abr 200521 Oct 2008North Carolina State UniversityLightweight high-tensile, high-tear strength bicomponent nonwoven fabrics
US788377228 Jun 20078 Feb 2011North Carolina State UniversityHigh strength, durable fabrics produced by fibrillating multilobal fibers
US793564526 Sep 20083 May 2011North Carolina State UniversityLightweight high-tensile, high-tear strength biocomponent nonwoven fabrics
US798122623 Jun 200619 Jul 2011North Carolina State UniversityHigh strength, durable micro and nano-fiber fabrics produced by fibrillating bicomponent islands in the sea fibers
US842055624 Jun 201116 Abr 2013North Carolina State UniversityHigh strength, durable micro and nano-fiber fabrics produced by fibrillating bicomponent islands in the sea fibers
Clasificaciones
Clasificación de EE.UU.156/308.8, 428/391, 442/359, 427/393.1, 252/8.81, 156/296, 428/369, 156/305, 524/274
Clasificación internacionalD06M13/292, D06M15/643
Clasificación cooperativaD06M13/292, D06M7/00, D06M15/643, D06M2200/40
Clasificación europeaD06M7/00, D06M13/292, D06M15/643
Eventos legales
FechaCódigoEventoDescripción
1 Dic 2008ASAssignment
Owner name: HERCULES INCORPORATED, DELAWARE
Free format text: PATENT TERMINATION CS-013625-0233;ASSIGNOR:CREDIT SUISSE, CAYMAN ISLANDS BRANCH;REEL/FRAME:021901/0585
Effective date: 20081113
11 Ago 2006ASAssignment
Owner name: HERCULES INCORPORATED, DELAWARE
Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE;REEL/FRAME:018087/0723
Effective date: 20060331
27 Abr 2006ASAssignment
Owner name: CREDIT SUISSE, NEW YORK
Free format text: SECOND LIEN SECURITY AGREEMENT;ASSIGNOR:FIBERVISIONS, L.P.;REEL/FRAME:017537/0220
Effective date: 20060426
Free format text: FIRST LIEN SECURITY AGREEMENT;ASSIGNOR:FIBERVISIONS, L.P.;REEL/FRAME:017537/0201
31 Dic 2002ASAssignment
Owner name: HERCULES INCORPORATED, DELAWARE
Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:BANK OF AMERICA, N.A., AS COLLATERAL AGENT;REEL/FRAME:013616/0722
Effective date: 20021219
Owner name: HERCULES INCORPORATED 1313 NORTH MARKET STREETWILM
27 Dic 2002ASAssignment
Owner name: CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT, N
Free format text: SECURITY INTEREST;ASSIGNOR:HERCULES INCORPORATED;REEL/FRAME:013625/0233
Effective date: 20021220
Owner name: CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT EL
Free format text: SECURITY INTEREST;ASSIGNOR:HERCULES INCORPORATED /AR;REEL/FRAME:013625/0233
5 Ene 2001ASAssignment
Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT, NORTH
Free format text: SECURITY INTEREST;ASSIGNORS:HERCULES FLAVOR, INC., A DELAWARE CORPORATION;WSP, INC., A DELAWARE CORPORATION;AQUALON COMPANY, A DELAWARE PARTNERSHIP;AND OTHERS;REEL/FRAME:011449/0877
Effective date: 20001114
Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT 101 N.
Free format text: SECURITY INTEREST;ASSIGNORS:HERCULES FLAVOR, INC., A DELAWARE CORPORATION /AR;REEL/FRAME:011449/0877
28 Oct 1997ASAssignment
Owner name: NATIONSBANK, N.A., AS AGENT, NORTH CAROLINA
Free format text: NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS;ASSIGNOR:FIBERCO, INC.;REEL/FRAME:008766/0071
Effective date: 19970924
9 Jul 1997ASAssignment
Owner name: FIBERCO, INC., DELAWARE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HERCULES INCORPORTED;REEL/FRAME:008639/0239
Effective date: 19970624