WO2000006373A1 - Nonwoven web comprising arched fibers - Google Patents

Nonwoven web comprising arched fibers Download PDF

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Publication number
WO2000006373A1
WO2000006373A1 PCT/US1999/015422 US9915422W WO0006373A1 WO 2000006373 A1 WO2000006373 A1 WO 2000006373A1 US 9915422 W US9915422 W US 9915422W WO 0006373 A1 WO0006373 A1 WO 0006373A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
axis
plane
filaments
arched
Prior art date
Application number
PCT/US1999/015422
Other languages
French (fr)
Inventor
Charles B. Hassenboehler
Original Assignee
The University Of Tennessee Research Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The University Of Tennessee Research Corporation filed Critical The University Of Tennessee Research Corporation
Publication of WO2000006373A1 publication Critical patent/WO2000006373A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0003—Fastener constructions
    • A44B18/0011—Female or loop elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating

Definitions

  • This invention relates to a nonwoven web comprising arched filaments
  • present invention is useful in mechanical fastening, filtering applications, and
  • the invention further relates to methods
  • hook and loop systems Such fabrics include those sold under
  • VelcroTM In a hook and loop fastening system, one fabric
  • Prior art loops comprise a stem
  • Air filtrations systems contain a filtering media which must be
  • the filter fabric becomes loaded it will cease to efficiently trap particulate
  • the apparatus of the present invention is directed towards a nonwoven
  • a minimum initial tensile modulus direction hereinafter referred to as the
  • minimum tensile modulus axis The initial tensile modulus is defined by the
  • the machine direction axis is defined by the direction of travel of
  • the invention further comprises at least one arched filament projecting
  • Each of the arched filaments comprises two base regions attached to the web plane, a leg region attached to each of the base
  • the web plane comprises only one or two arched
  • the present invention is also directed toward methods for producing
  • Figure 1 is an isometric view of the web plane of the present invention.
  • Figure 2 is an enlarged top view of the web plane of the present
  • Figure 3A is an enlarged top view of the web plane of the present
  • Figure 3B is a top view of a preferred embodiment of the method of the
  • Figure 4 is a top view of a preferred embodiment of the method of the
  • Figure 5A is a block diagram of a preferred embodiment of the method
  • Figure 5B is a block diagram of a preferred embodiment of the method
  • the present invention is directed towards a
  • nonwoven web comprising a nonwoven web plane 10 having a machine
  • the minimum tensile modulus axis is
  • the invention further comprises at least one arched filament 12, each
  • the filaments further comprise an arched central region
  • filaments are positioned such that their base region define an axis within 45
  • filaments are positioned such that their base ends define an axis within 30
  • the web plane is formed from a
  • thermoplastic precursor web In another preferred embodiment, the thermoplastic precursor web is thermoplastic thermoplastic precursor web.
  • thermoplastic precursor web is bonded.
  • the thermoplastic precursor web is bonded.
  • thermoplastic precursor web is spunbonded or thermally bonded.
  • the nonwoven web further comprises a
  • the substrate comprises meltblown polymer.
  • the meltblown polymer is polypropylene, polyurethane,
  • polyethylene or polyester, or a copolymer of the above.
  • polyester or a copolymer of the above.
  • the substrate is adhesively laminated to the web plane.
  • the web plane of the present invention may be made from a variety of
  • the web plane comprises an average arched filaments density of at least
  • Such a filament density can be
  • the present invention is particularly suitable as a mechanical fastener
  • arches of the present invention have a greater surface area than conventional
  • loop fasteners having a radius which is equal to the radius of curvature of
  • the nonwoven web of the present invention is nonwoven web of the present
  • invention has a minimum peel strength of at least 23 grams of force per
  • the web plane may
  • the present invention is also directed toward methods for producing
  • the first method here of the present invention comprises heating a
  • nonwoven web sufficiently to permit plastic deformation of its filaments in
  • the heating and applying of tensile force are
  • the force is applied by a stretching machine
  • the force is of sufficient magnitude to cause an arching of one or more filaments out of the web plane as shown
  • the tensile force is applied in the cross direction and it is of sufficient
  • the tensile force is applied in the machine direction and it is of
  • a machine located on a cross direction
  • edge of the web plane, opposite a roll of web plane, is attached to the web by a gripping member such that the machine can apply a tensile force along the
  • a third method of the present invention is depicted in Figure 4.
  • step of the third method is gripping a rectangular web plane comprising a
  • the gripping occurs at a region in the
  • method of the present invention further comprises installing a cross direction
  • the nonwoven web is initially machine drawn.
  • the third method further comprises applying directed forces, F, in the
  • filaments are positioned such that their base regions define an axis within 45 degrees of the direction of the minimum initial tensile modulus direction of the

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

This invention relates to a nonwoven web comprising arched filaments aligned within 45 degrees of a minimum tensile modulus direction axis. The present invention is useful in mechanical fastening, filtering applications, and for nonwovens utilizing bias stretch. The invention further relates to methods for making such a web.

Description

Title: NONWOVEN WEB COMPRISING ARCHED FIBERS
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a nonwoven web comprising arched filaments
aligned within 45 degrees of a minimum tensile modulus direction axis. The
present invention is useful in mechanical fastening, filtering applications, and
for nonwovens utilizing bias stretch. The invention further relates to methods
for making such a web.
2. Description of the Prior Art
Fabrics have been used in mechanical fastening applications, typically
referred to as "hook and loop" systems. Such fabrics include those sold under
the trademark Velcro™. In a hook and loop fastening system, one fabric
comprising hooks is mechanically fastened to another fabric comprising loops
via the insertion of the hooks into the loops. Prior art loops comprise a stem
which projects up from the surface of the fabric and a circular loop attached
to the stem. The shape of such stem and loop combinations is similar to the
shape of a magnifying glass with a cylindrical handle. Such prior art hook and
loop systems are expensive to produce. The gripping power of such systems
is limited by the size of the loop openings. Air filtrations systems contain a filtering media which must be
sufficiently porous to allow air to pass through the filtering media while
trapping undesirable particulate matter. Such filters are commonly made out
of a fiberglass fabric. Such filters have limited utility and low pressure drop
applications. Another drawback of conventional filtering media is that once
the filter fabric becomes loaded it will cease to efficiently trap particulate
matter.
SUMMARY OF THE INVENTION
The apparatus of the present invention is directed towards a nonwoven
web or web plane comprising a machine direction axis and an axis Ω defining
a minimum initial tensile modulus direction, hereinafter referred to as the
"minimum tensile modulus axis". The initial tensile modulus is defined by the
slope of the stress strain curve for the nonwoven web, at that region of the
curve where the web material has elastic properties. It is known to those of
ordinary skill in the art, that as stress increases, the slope of the stress strain
curve eventually increases, beyond that slope which defines the initial tensile
modulus. The machine direction axis is defined by the direction of travel of
the web plane as a machine produces it.
The invention further comprises at least one arched filament projecting
out of the web plane. Each of the arched filaments comprises two base regions attached to the web plane, a leg region attached to each of the base
regions and projecting out of the web plane, and an arched central region
connected to each of the leg regions. The majority of the arched filaments are
positioned such that their base regions define an axis within 45 degrees of the
tensile modulus direction axis Ω. The phrase "within 45 degrees," as used
herein, means plus and minus 45 degrees.
In a case where the web plane comprises only one or two arched
filaments, all of the arched filaments in the web plane have base regions
defining an axis within 45 degrees of the minimum tensile modulus axis. The
present invention is well suited to a variety of garment fastener applications,
including but not limited to, diapers, pajamas, infant garments, and hospital
gowns, and bulletin board.
The present invention is also directed toward methods for producing
arched filaments in a nonwoven web. A method of the present invention
comprises gripping a nonwoven web plane having a machine direction axis
and a cross direction axis with a tensioning device, applying a tensile force
and/or shear force to a nonwoven web plane which comprises a multiplicity
of filaments, and heat setting. The shear force is applied along the machine
direction axis in the vicinity of the web edges. The magnitude of the force will
depend, in part, on the filament size and composition. DESCRIPTION OF DRAWINGS
Figure 1 is an isometric view of the web plane of the present invention.
Figure 2 is an enlarged top view of the web plane of the present
invention.
Figure 3A is an enlarged top view of the web plane of the present
invention resulting from shear forces.
Figure 3B is a top view of a preferred embodiment of the method of the
present invention.
Figure 4 is a top view of a preferred embodiment of the method of the
present invention.
Figure 5A is a block diagram of a preferred embodiment of the method
the of the present invention.
Figure 5B is a block diagram of a preferred embodiment of the method
of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in Figure 1 , the present invention is directed towards a
nonwoven web comprising a nonwoven web plane 10 having a machine
direction axis 11 , a cross direction axis 13 and a minimum tensile modulus
axis 9. In a preferred embodiment, the minimum tensile modulus axis is
located between 10 to 80 degrees from the cross direction axis. The invention further comprises at least one arched filament 12, each
of said filaments comprising two base regions 14 attached to the web plane,
and a leg region 16 attached to each of said base regions, and projecting out
of said web plane. The filaments further comprise an arched central region
18 connected to each of said leg regions wherein the majority of said arched
filaments are positioned such that their base region define an axis within 45
degrees of the minimum tensile modulus axis 9.
A top view of the present invention is shown in Figure 2. The angle θ,
measured relative to the minimum tensile modulus axis depicted in Figure 2,
is the angle within which a majority of the base ends of said filaments define
an axis. In another preferred embodiment, at least two-thirds of the arched
filaments are positioned such that their base ends define an axis within 30
degrees of the minimum tensile modulus direction.
In a preferred embodiment, the web plane is formed from a
thermoplastic precursor web. In another preferred embodiment, the
thermoplastic precursor web is bonded. In other preferred embodiments, the
thermoplastic precursor web is spunbonded or thermally bonded.
In a preferred embodiment, the nonwoven web further comprises a
substrate 15 attached to the nonwoven web plane, as shown in Figure 1. In
a preferred embodiment, the substrate comprises meltblown polymer. In a preferred embodiment, the meltblown polymer is polypropylene, polyurethane,
polyethylene, or polyester, or a copolymer of the above. In a preferred
embodiment, the substrate is adhesively laminated to the web plane.
The web plane of the present invention may be made from a variety of
different fibers having different filament diameters. The filament number
density of the web plane is, in part, a function of the filament size. In a
preferred embodiment of the present invention comprising a thermoplastic
web, the web plane comprises an average arched filaments density of at least
20 arched filaments per square centimeter. Such a filament density can be
achieved by practicing the method of the present invention on a nonwoven
web comprising a filament density of at least 40 filaments per square
centimeter.
The present invention is particularly suitable as a mechanical fastener
to be used in conjunction with an article comprising hooks which are
releaseably insertable into the arched filaments of the present invention. The
arches of the present invention have a greater surface area than conventional
"loop" fasteners having a radius which is equal to the radius of curvature of
the arched filaments of the present invention. This increased surface area
increases the probability that a hook from a mating strip of fastener material
will engage each loop. This produces a mechanical fastener having superior peel strength to prior art mechanical fasteners using a hook and loop type
arrangement. In a preferred embodiment, the nonwoven web of the present
invention has a minimum peel strength of at least 23 grams of force per
centimeter wide strip of web. In a preferred embodiment, the web plane may
be cut into strips which may be attached onto garments through the use of an
adhesive.
The present invention is also directed toward methods for producing
arched filaments in a nonwoven web, as illustrated in Figures 3B, 4, 5A and
5B. The first method here of the present invention comprises heating a
nonwoven web sufficiently to permit plastic deformation of its filaments in
response to an applied tensile stress; gripping a nonwoven web plane having
a machine direction axis and a cross direction axis; and applying tensile force,
F, in the direction of the machine direction axis 11 or cross direction axis 13
as shown in Figure 3B and Figure 5A, blocks 60-64.
In a preferred embodiment, the heating and applying of tensile force are
performed simultaneously. These steps may also be performed sequentially.
In a preferred embodiment, the force is applied by a stretching machine
22, comprising a gripping member 24 which grips the web and stretches it in
the direction of the cross direction axis. The force is of sufficient magnitude to cause an arching of one or more filaments out of the web plane as shown
in block 64 of Figure 5A.
In a preferred embodiment of the first method of the present invention,
the tensile force is applied in the cross direction and it is of sufficient
magnitude to produce a cross direction elongation of at least 15%, and a
respective machine direction contraction of sufficient magnitude to cause an
arching of one or more filaments out of the web plane, as shown in block 64
of Figure 5A.
In a preferred embodiment, two machines located on opposite machine
direction edges of the web plane are attached to the web by a gripping
member such that these machines can apply a tensile force in opposite
directions along the cross direction axis, as shown in Figure 3B.
In another preferred embodiment of the first method of the present
invention, the tensile force is applied in the machine direction and it is of
sufficient magnitude to produce a machine direction elongation of at least 15
percent, and a respective cross direction contraction of sufficient magnitude
to cause an arching of one or more filaments out of the web plane, as shown
in Figure 3A and in block 74 of Figure 5B.
In a preferred embodiment, a machine located on a cross direction
edge of the web plane, opposite a roll of web plane, is attached to the web by a gripping member such that the machine can apply a tensile force along the
machine direction axis, as shown in Figure 3A.
A third method of the present invention is depicted in Figure 4. The first
step of the third method is gripping a rectangular web plane comprising a
multiplicity of filaments and at least two opposite machine direction edges and
two opposite cross direction edges. The gripping occurs at a region in the
vicinity of the machine direction edges. In a preferred embodiment, the third
method of the present invention further comprises installing a cross direction
or machine direction extension of at least 10 percent to the web. In another
preferred embodiment, the nonwoven web is initially machine drawn. The
phrase "opposite machine direction edges", as used herein, means two edges
that define the cross direction width edges of the web plane.
The third method further comprises applying directed forces, F, in the
vicinity of each gripped edge such that said web plane is subjected to a
shearing stress of sufficient magnitude to install a shear deformations of at
least 12 degrees and cause an arching of one or more filaments out of said
web plane. This step is depicted in Figure 4. This method can be used to
produce arched filaments in a web plane wherein the majority of arched
filaments are positioned such that their base regions define an axis within 45 degrees of the direction of the minimum initial tensile modulus direction of the
instant web product.
The foregoing disclosure and description of the invention are illustrative
and explanatory thereof, and various changes in the size, shape and
materials, as well as in the details of the illustrated construction, may be made
without departing from the spirit of the invention.

Claims

What is claimed is
1. A nonwoven web comprising:
a. a nonwoven web plane having a machine direction axis, a cross
direction axis, and a minimum tensile modulus axis; and
b. at least one arched filament, each of said filaments comprising
two base regions attached to said web plane, a leg region
attached to each of said base regions and projecting out of said
web plane, and an arched central region connected to each of
said leg regions wherein the majority of said arched filaments are
positioned such that their base regions define an axis within 45
degrees of said minimum tensile modulus axis.
2. The nonwoven web of claim 1 wherein said minimum tensile modulus
axis is located between 10 and 80 degrees from said cross direction
axis.
3. The web of claim 1 , wherein said web plane is formed from a
thermoplastic precursor web.
4. The web of claim 3, wherein said web plane comprises an average
arched filament density of at least 20 arched filaments per square
centimeter.
The web of claim 3, wherein said thermoplastic precursor web is
bonded.
6. The web of claim 5, wherein said thermoplastic precursor web is spun
bonded.
7. The web of claim 5, wherein said thermoplastic precursor web is
thermally bonded.
8. The web of claim 1 wherein at least two thirds of said arched filaments
are positioned such that their base ends define an axis within 45
degrees of said minimum tensile modulus axis.
9. The web of claim 1 further comprising a substrate attached to said web
plane.
10. The web of claim 9, wherein said substrate comprises a meltblown
polymer.
11. The web of claim 10, wherein said polymer is polypropylene,
polyurethane, polyethylene, polyester, nylon, or a copolymer of said
polymers.
12. The web of claim 9, wherein said substrate is adhesively laminated to
said web plane.
13. The web of claim 1 , having a minimum peel strength of at least 23
grams per centimeter wide strip of said web.
14. A nonwoven web comprising:
a. a nonwoven web plane having a machine direction axis, a cross
direction axis, and a minimum tensile modulus axis; and
b. at least one arched filament, each of said filaments comprising
two base regions attached to said web plane, a leg region
attached to each of said base regions and projecting out of said
web plane, and an arched central region connected to each of said leg regions wherein the majority of said arched filaments are
positioned such that their base regions define an axis within 30
degrees of said minimum tensile modulus axis; and
c. a substrate attached to said web plane.
15. The web of claim 14, wherein at least two thirds of said filaments are
positioned such that their base ends define an axis within 30 degrees
of said minimum tensile modulus axis.
16. The web of claim 14, wherein said web plane is formed from a
thermoplastic precursor web.
17. The web of claim 14, wherein said thermoplastic precursor web is
bonded.
18. A method for producing arched filaments in a nonwoven web having
machine direction edges comprising:
a. heating a nonwoven web sufficiently to permit plastic deformation
of the filaments in response to an applied tensile stress; b. gripping a nonwoven web plane having a machine direction axis
and a cross direction axis; and
c. applying a tensile force to a nonwoven web plane in the direction
of a machine direction axis or a cross direction axis, said force
being of sufficient magnitude to cause an arching of one or more
filaments out of said plane.
19. The method of claim 18, wherein the tensile force is applied in the cross
direction and is of sufficient magnitude to produce a cross direction
elongation of at least 15% and a respective machine direction
contraction, said contraction being of sufficient magnitude to cause an
arching of one or more filaments out of said web plane.
20. The method of claim 19, wherein two machines located on opposite
machine direction edges of the web plane are attached to the web by
a gripping member such that said machines can apply a tensile force
in opposite directions along the cross direction axis.
21. The method of claim 19 wherein said heating and said applying a
tensile force are performed simultaneously.
22. The method of claim 18, wherein the tensile force is applied in the
machine direction and is of sufficient magnitude to produce a machine
direction elongation of at least 15% and a respective cross direction
contraction, said contraction being of sufficient magnitude to cause an
arching of one or more filaments out of said web plane.
23. The method of claim 22, wherein a machine located on a cross
direction edge of the web plane opposite a roll of web plane, is attached
to the web by a gripping member such that said machine can apply a
tensile force along the machine direction axis.
24. A method of producing arched filaments in a nonwoven web having a
machine direction axis comprising:
a. gripping a rectangular web plane comprising a multiplicity of
filaments and at least two opposite machine direction edges and
two opposite cross direction edges, said gripping occurring at a
region in the vicinity of said machine direction edges; and
b. applying sufficient forces to move each of said gripped regions
in opposite directions along a machine direction axis, such that said web plane is subjected to a shearing stress of sufficient
magnitude to install a shear deformation of at least 12 degrees
and to cause an arching of one or more filaments out of said web
plane.
25. The method of claim 24 further comprising installing of a cross direction
or machine direction extension of at least 10% to the web.
26. The method of claim 24 wherein the nonwoven web is initially machine
drawn.
PCT/US1999/015422 1998-07-30 1999-07-09 Nonwoven web comprising arched fibers WO2000006373A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12471698A 1998-07-30 1998-07-30
US09/124,716 1998-07-30

Publications (1)

Publication Number Publication Date
WO2000006373A1 true WO2000006373A1 (en) 2000-02-10

Family

ID=22416440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/015422 WO2000006373A1 (en) 1998-07-30 1999-07-09 Nonwoven web comprising arched fibers

Country Status (2)

Country Link
TW (1) TW434341B (en)
WO (1) WO2000006373A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101739602B1 (en) 2009-06-19 2017-05-24 홀링스워쓰 앤드 보우즈 컴파니 Flutable fiber webs with high dust holding capacity

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053066A (en) * 1990-05-04 1991-10-01 Hassenboehler Charles B Nonwoven filter and method of manufacture
US5326612A (en) * 1991-05-20 1994-07-05 The Procter & Gamble Company Nonwoven female component for refastenable fastening device and method of making the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053066A (en) * 1990-05-04 1991-10-01 Hassenboehler Charles B Nonwoven filter and method of manufacture
US5326612A (en) * 1991-05-20 1994-07-05 The Procter & Gamble Company Nonwoven female component for refastenable fastening device and method of making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101739602B1 (en) 2009-06-19 2017-05-24 홀링스워쓰 앤드 보우즈 컴파니 Flutable fiber webs with high dust holding capacity

Also Published As

Publication number Publication date
TW434341B (en) 2001-05-16

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