U.S. patent application number 10/981467 was filed with the patent office on 2005-07-21 for hydrophilic nonwoven fabric.
This patent application is currently assigned to Mitsui Chemicals, Inc.. Invention is credited to Kawakami, Yoshihisa, Kunimoto, Naosuke.
Application Number | 20050159067 10/981467 |
Document ID | / |
Family ID | 34575918 |
Filed Date | 2005-07-21 |
United States Patent
Application |
20050159067 |
Kind Code |
A1 |
Kunimoto, Naosuke ; et
al. |
July 21, 2005 |
Hydrophilic nonwoven fabric
Abstract
The present invention is to provide a hydrophilic nonwoven
fabric which can reveal hydrophilicity even after exposure to high
temperature. The hydrophilic nonwoven fabric comprising an olefinic
polymer containing a hydrophilic agent is characterized in that
hydrophilicity can be revealed after heating treatment for an hour
at 60.degree. C. The nonwoven fabric is manufactured by using an
olefinic polymer (B) and a master batch where a hydrophilic agent
is included in an olefinic polymer (A), wherein an MFR (melt flow
rate) of a master batch is preferably the same as or lower than the
MFR of an olefinic polymer composition forming the nonwoven
fabric.
Inventors: |
Kunimoto, Naosuke;
(Sodegaura-shi, JP) ; Kawakami, Yoshihisa;
(Sodegaura-shi, JP) |
Correspondence
Address: |
BURNS DOANE SWECKER & MATHIS L L P
POST OFFICE BOX 1404
ALEXANDRIA
VA
22313-1404
US
|
Assignee: |
Mitsui Chemicals, Inc.
Tokyo
JP
|
Family ID: |
34575918 |
Appl. No.: |
10/981467 |
Filed: |
November 5, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60564967 |
Apr 26, 2004 |
|
|
|
Current U.S.
Class: |
442/414 ;
442/327; 442/400; 442/401 |
Current CPC
Class: |
D01F 6/04 20130101; Y10T
442/681 20150401; D01F 1/10 20130101; Y10T 442/68 20150401; D04H
3/007 20130101; Y10T 442/60 20150401; D04H 1/4291 20130101; Y10T
442/696 20150401 |
Class at
Publication: |
442/414 ;
442/400; 442/401; 442/327 |
International
Class: |
D04H 001/00; D04H
003/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 7, 2003 |
JP |
2003-377627 |
Claims
What is claimed is:
1. A nonwoven fabric comprising polyolefin in which liquid
transport is recognized within 10 seconds as measured by the liquid
transport speed specified in EDANA 150 2-93 after heating treatment
for an hour at 60.degree. C.
2. The nonwoven fabric according to claim 1, wherein said
polyolefin is an olefin polymer containing a hydrophilic
compound.
3. The nonwoven fabric according to claim 1, wherein said
polyolefin is an olefin polymer where a hydrophilic compound is
contained as one mixture compounded.
4. The nonwoven fabric according to claim 1, wherein the nonwoven
fabric is made from polyolefin formed by using a hydrophilic
compound as a master batch where the melt flow index of the master
batch is same or lower than the melt flow index of polyolefin.
5. The nonwoven fabric according to claim 1, wherein the nonwoven
fabric is a spunbonded nonwoven fabric or a meltblown nonwoven
fabric.
Description
TECHNICAL FIELD
[0001] The present invention relates to a hydrophilic nonwoven
fabric. More specifically, the invention relates to a hydrophilic
nonwoven fabric which can maintain hydrophilicity even when the
hydrophilic nonwoven fabric is exposed to the environment of high
temperature.
BACKGROUND ART
[0002] A method of coating a fiber with a hydrophilic agent and a
method of adding a hydrophilic agent to a resin forming fibers have
been known for a conventional method of allowing hydrophilicity to
nonwoven fabrics (for example, refer to JP2003-201670A). Also, a
hydrophilic agent compounded to a resin was disclosed in
WO2002-42530A. However, when a method of allowing hydrophilicity by
coating was repeatedly used, it was difficult to maintain
hydrophilic ability continuously because a coating agent was fallen
off. Also, a method of adding a hydrophilic agent to a resin had
hydrophilicity continuously, but it was difficult to maintain
hydrophilic ability after exposure to high temperature.
DISCLOSURE OF THE INVENTION
[0003] An object of the present invention is to provide a
hydrophilic nonwoven fabric which can reveal hydrophilicity even
after exposure to high temperature.
[0004] The present inventor has found hydrophilic nonwoven fabrics
which have hydrophilicity continuously and maintain heat resistant
hydrophilicity by adding a specific master batch containing a
hydrophilic agent to a resin. Thus, the present invention has been
completed.
[0005] Namely, the present invention provides a nonwoven fabric
comprising polyolefin in which liquid transport is recognized
within 10 seconds as measured by the liquid transport speed
specified in EDANA 150 2-93 (or the more recent version EDANA 150
4-99) after heating treatment for an hour at 60.degree. C. The
content of EDANA 150 2-93 (EDANA 150 4-99) is hereby incorporated
by reference.
[0006] Polyolefin to be used for the present invention is an olefin
polymer containing a hydrophilic compound. Also, one of desirable
embodiments of the present invention is a nonwoven fabric, wherein
polyolefin to be used for the present invention is an olefin
polymer where a hydrophilic compound is contained as one mixture
compounded.
[0007] According to an appropriate embodiment of the present
invention, the nonwoven fabric is manufactured by using an olefinic
polymer (B) and a master batch where a hydrophilic agent is
included in an olefinic polymer (A), wherein an MFR (melt flow
rate) of the master batch is the same as or lower than the MFR of
an olefinic polymer composition forming the nonwoven fabric.
[0008] The present invention provides a method for manufacturing a
hydrophilic nonwoven fabric, wherein the hydrophilic nonwoven
fabric is manufactured by extruding from a spinning nozzle after
melting and compounding (kneading) a master batch where a
hydrophilic agent is included in an olefinic polymer (A) together
with an olefinic polymer (B) at an extruder, wherein the MFR of the
master batch is the same as or lower than the MFR of an olefinic
polymer composition forming the nonwoven fabric.
Effect of the Invention
[0009] According to the present invention, it is possible to
provide a hydrophilic nonwoven fabric which can reveal
hydrophilicity even when the nonwoven fabric is exposed to an
environment of high temperature and is superior in heat
resistance.
BEST MODE FOR CARRYING OUT THE INVENTION
[0010] An olefinic polymer, a hydrophilic agent, a nonwoven fabric
and a composite nonwoven fabric in which the nonwoven fabrics are
laminated according to the present invention will be described in
more detail below.
[0011] In the present specification, a nonwoven fabric is sometimes
described as a "hydrophilic nonwoven fabric", in which liquid
transport is recognized within 10 seconds as measured by the liquid
transport speed specified in EDANA 150 2-93. Also, a nonwoven
fabric comprising polyolefin is sometimes described as a
"polyolefin nonwoven fabric".
[0012] As an olefinic polymer (B) which can be used for the
nonwoven fabric of the present invention, there can be mentioned,
for example, ethylene-based polymers such as a homopolymer of
ethylene, a copolymer of ethylene and other .alpha.-olefin and the
like; propylene-based polymers such as a homopolymer of propylene,
a copolymer of propylene and other .alpha.-olefin and the like; or
a mixture thereof. Of these polymers, a propylene-based polymer is
preferred.
[0013] [Propylene-based Polymer]
[0014] A propylene-based polymer which can be used for the present
invention includes a homopolymer of propylene or a copolymer of
propylene as a main monomer component and at least one other
.alpha.-olefin. As other .alpha.-olefins, there can be mentioned,
for example, .alpha.-olefins having 2 to 20 carbon atoms and
preferably having 2 to 8 carbon atoms such as ethylene, 1-butene,
1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene and the like.
These homopolymers or copolymers can be used singly (one kind) or
in combination of 2 or more kinds.
[0015] As for a propylene-based polymer which can be used for the
present invention, the MFR is usually 15 to 2000 g/10 min.,
preferably 1.5 to 900 g/10 min., more preferably 10 to 100 g/10
min., and further preferably 30 to 80 g/10 min. The MFR is measured
on the basis of the standards according to each resin. For example,
a propylene-based polymer is measured under a load of 2.16 kg at
230.degree. C. in accordance with ASTM D1238.
[0016] Mw/Mn, that is, the ratio of weight average molecular weight
(Mw) and number average molecular weight (Mn) of a propylene-based
polymer which can be used for the present invention is usually 1.5
to 8 and preferably 1.5 to 5. Furthermore, Mw/Mn of 1.5 to 3 is
preferred from the facts that spinnability is good and fibers
having particularly excellent fiber strength can be obtained. In
the present invention, good spinnability means that no thread
breakage occurs during drawing and extending from the spinning
nozzle, and fusion of filaments does not occur. In the present
invention, Mw/Mn is measured by GPC (gel permeation chromatography)
in a usual method.
[0017] Other components may be added to the resin to be used for
production of the nonwoven fabric of the present invention as
desired, within the range of not damaging the object of the present
invention. Other components include additives that are combined to
provide further functions, which can be appropriately combined with
by the proper selection for each use.
[0018] As other components, there can be mentioned, for example,
known heat resistant stabilizers, weather resistant stabilizers,
various stabilizers, anti-static agents, slipping agents,
anti-blocking agents, anti-fogging agents, lubricants, dyes,
pigments, natural oil, synthetic oil, waxes, fillers and the
like.
[0019] As stabilizers, there can be mentioned, for example,
anti-aging agents such as 2,6-di-t-butyl-4-methylphenol (BHT) and
the like; phenol-based antioxidants such as
tetrakis[methylene-3-(3,5-di-t-butyl-4--
hydoxyphenyl)propionate]methane,
.beta.-(3,5-di-t-butyl-4-hydroxyphenyl)pr- opionic acid alkyl
esters, 2,2'-oxamidobis[ethyl-3-(3,5-di-t-butyl-4-hydro-
xyphenyl)]propionate, Irganox 1010 (trademark of hindered phenol
type antioxidant) and the like; fatty acid metal salts such as zinc
stearate, calcium stearate, calcium 1,2-hydroxystearate and the
like; polyhydric alcohol fatty acid esters such as glycerine
monosterate, glycerine distearate, pentaerythritol monostearate,
pentaerythritol distearate, pentaerythritol tristearate and the
like. These stabilizers can also be used in combination.
[0020] Furthermore, as fillers, there can be mentioned, for
example, silica, diatomaceous earth, alumina, titanium oxide,
magnesium oxide, pumice powders, pumice balloon, aluminum
hydroxide, magnesium hydroxide, basic magnesium carbonate,
dolomite, calcium sulfate, potassium titanate, barium sulfate,
calcium sulfite, talc, clay, mica, asbestos, calcium silicate,
montmorillonite, bentonite, graphite, aluminum powders, molybdenum
sulfide and the like.
[0021] [Hydrophilic Agent]
[0022] A hydrophilic agent to be used for the present invention is
not particularly restricted as far as the hydrophilic agent can be
made to a master batch. Specifically, the hydrophilic agents
include nonionic surfactants such as fatty acid glyceride,
alkoxylated alkyl phenol, polyoxy alkylene fatty acid ester, alkyl
polyoxy ethylene alcohol, fatty acid amide and the like; a group of
surfactants such as fatty acid salts, alkyl sulfuric acid ester
salts, alkyl benzene sulfonic acid salts, alkyl naphthalene
sulfonic acid salts, dialkyl sulfosuccinic acid salts, special
anion and the like; those properly selected from a compound group
such as polyethylene glycol, a copolymer of vinyl alcohol and
ethylene, and a polyether block amide copolymer. These can be used
singly or in combination.
[0023] Of these agents, those represented by the following formula
are preferred.
R.sup.1--(hydrophilic oligomer)
[0024] wherein R.sup.1 is a straight-chained or branched alkyl
group and preferably has 22 to 40 carbon atoms. Also, hydrophilic
oligomers are preferably those comprising single or oligomer unit
derived from ethylene oxide, propylene oxide, ethylene glycol,
epichlorohydrin, acrylic acid, methacrylic acid, ethylene imine,
caprolactone, vinyl alcohol and vinyl acetate and units thereof are
made up of 2 to 10.
[0025] More preferably, those having the following formula can be
mentioned.
R.sup.1(OCH.sub.2CH.sub.2).sub.xOH
[0026] wherein x is a number of 2 to 10.
[0027] Furthermore, for example,
CH.sub.3CH.sub.2(CH.sub.2CH.sub.2).sub.13-
CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.2.5OH can be specifically
mentioned. Herein, the adduct number 2.5 of ethylene oxide is an
average value.
[0028] These compounds of the structure can be used in combination
of 2 or more kinds.
[0029] A hydrophilic agent which can be applied to the present
invention, for example, when the olefinic polymer (A) is a
propylene-based polymer, is preferably included to the olefinic
polymer (A) in the form of a master batch at a ratio of 5 to 70
weight %, wherein the MFR of the olefinic polymer (A) measured
under a load of 2.16 kg at 230.degree. C. is 1.5 to 2000 g/10 min.
and more preferably 5 to 800 g/10 min. The olefinic polymer (A) to
be used here is preferably the same kind as the olefinic polymer
(B) forming the nonwoven fabric. Furthermore, the MFR of the master
batch to be added is preferably the same as or lower than the MFR
of the olefinic polymer composition forming the produced nonwoven
fabric. For this reason, the MFR of the propylene-based polymer to
which the master batch is added may be equivalent to or lower than
the MFR of the master batch.
[0030] The range of amount of the master batch is preferably 0.1 to
10 weight % and more preferably 0.5 to 5 weight %. Here, the MFR is
the same, which means that the MFR of the olefinic polymer
composition and the MFR of the master batch of a hydrophilic agent
are viewed the same in consideration of the range of measurement
error.
[0031] [Nonwoven Fabric]
[0032] The intended amount of the hydrophilic nonwoven fabric of
the present invention is usually 3 to 100 g/m.sup.2 and preferably
20 to 60 g/m.sup.2.
[0033] The nonwoven fabric of the present invention is preferably a
spunbonded nonwoven fabric or a meltblown nonwoven fabric. The
spunbonded nonwoven fabric is produced, for example, by the
following method. A hydrophilic agent is added to the olefinic
polymer (A) so as to be a predetermined density, and then the
mixture is melted and compounded to produce a master batch of a
hydrophilic agent (the olefinic polymer (A) used here is preferably
the same kind as the olefinic polymer (B) forming the nonwoven
fabric). The thus-produced master batch is mixed with the olefinic
polymer (B) forming the nonwoven fabric at a predetermined rate,
and then the mixture is melted by using an extruder and the like.
The melted product is drew from a spinning cap having a spinning
nozzle, thus spinning long-fibers. So, the thus-spun composite
long-fiber is cooled by cooling fluid and further stress is added
to long-fibers by extending air to have a predetermined fiber
titer. The long-fiber is collected as it is on the web-forming belt
and piled up at a predetermined thickness. Next, entangling
treatment using means such as a needle punch, water jet, ultrasonic
seal and the like or thermo melting treatment using a heat
embossing roll is performed. In case of thermo melting treatment by
a heat embossing roll, embossing area of the embossing roll is
usually 5 to 30%. Such areas are preferred.
[0034] The meltblown nonwoven fabric is produced in the same manner
as the spunbonded nonwoven fabric. That is, a hydrophilic agent is
added to the olefinic polymer (A) so as to be a predetermined
density, and then the mixture is melted and compounded to produce a
master batch of a hydrophilic agent. The thus-produced master batch
is mixed with the olefinic polymer (B) forming the nonwoven fabric
at a predetermined rate, and then the mixture is melted by using an
extruder and the like. The melted product is drew from a meltblown
spinning cap to obtain fibers. The thus-obtained fibers become
traction fine to ultrafine fibers by high-temperature and
high-speed gas, and then they are taken for an ultrafine fiber web
by a collection device for further performing thermo melting
treatment as needed.
[0035] The hydrophilic nonwoven fabric of the present invention has
excellent heat resistant hydrophilicity. Herein, excellent heat
resistant hydrophilicity means that, for example, in a spunbond
process, hydrophilic ability is maintained even after heating
treatment such as heat embossing process and the like was
performed. Especially, the hydrophilic nonwoven fabric of the
present invention has a remarkable heat resistant hydrophilicity
which can reveal hydrophilicity even after heating treatment for an
hour at 60.degree. C. Incidentally, a drying method or a heating
method is not particularly restricted thereto.
[0036] The nonwoven fabric comprises polyolelfin of the present
invention, wherein the hydrophilic agent as described above is
contained in polyolefin as one mixture compounded. Whether the
hydrophilic agent is compounded or not can be confirmed by treating
the nonwoven fabric with water. Namely, when the surface tension of
water before treating the nonwoven fabric (for example, dipping and
stirring the nonwoven fabric) is compared with the surface tension
after treating the nonwoven fabric, if it is reduced, it can be
considered that a hydrophilic agent is coated on the fiber forming
the nonwoven fabric or dissolution occurs at an intense state even
if it is compounded. Usually, the pure surface tension is about 70
to 72 mN/m. However, when an additive or the like is present on the
fiber, the pure surface tension also depends on a structure of the
additive present on the fiber, but the water surface tension is
reduced down to 60 mN/m or less and further down to 55 mN/m or
less. The nonwoven fabric of the present invention that is treated
with the water is transported within 10 seconds even when the
liquid transport speed specified in EDANA 150 2-93 is measured even
after treating at room temperature and 60.degree. C. for an
hour.
[0037] According to the test method of EDANA 150 2-93 (EDANA 150
4-99), the following testing conditions material, reagents,
apparatus and procedure are used:
[0038] Testing Conditions
[0039] Condition the samples of nonwoven and the filter papers to
be used as the standard absorbent pad for 24 hours and test at
20.degree. C. and 65% relative humidity; test conditions are to be
mentioned in the report (see ERT 60 for tolerances and choice of
conditions). ISO 9073-8: 1995 Textiles--Test method for
nonwovens--Determination of liquid strike-through time (stimulated
urine). (EN 29073 part 8) (For testing conditions specified in ISO
9073-8, refer to ERT 60.)
[0040] Material and Reagents
[0041] 1. Reference absorbent pad, consisting of five layers of
reference filter paper (100 mm.times.100 mm) with the smooth side
uppermost and having a mean strike-through time, in 10
determinations without the nonwoven, of (3.+-.0.5) s. [Reference
filter paper: ERT FF3 filter paper supplied by Hollingsworth &
Vose Company Ltd.]
[0042] 2. Simulated urine, consisting of a 9 g/l solution of sodium
chloride in distilled water with a surface tension of (70.+-.2)
mN/m. This surface tension should be checked before each series of
tests, as surface can alter tension during storage.
[0043] Apparatus
[0044] 1. Burette, of 50 ml capacity, with a supporting stand.
[0045] 2. Funnel, fitted with a magnetic valve, giving a rate of
discharge of 25 ml in (3.5.+-.0.25) s.
[0046] 3. Ring stand, to support the funnel.
[0047] 4. Strike-through plate constructed of 25 mm thick
transparent acrylic sheet, of total mass (500.+-.5) g, fitted with
corrosion-resistant electrodes consisting of 1.6 mm diameter
platinum or stainless steel wire set in grooves of cross-section
4.0 mm.times.7.0 mm cut in the base of the plate and fixed with
quick-setting epoxy resin.
[0048] 5. Baseplate, of transparent acrylic sheet, approximately
125 mm.times.125 mm square and 5 mm thick.
[0049] 6. Electronic timer, which can be read to the nearest 0.01
s.
[0050] Procedure
[0051] 1. Set up the ring stand holding the funnel and position the
burette with the tip inside the funnel.
[0052] 2. Cut the required number of pieces of nonwoven, 125
mm.times.125 mm, test pieces being selected in accordance with ERT
130.
[0053] 3. Place one nonwoven test piece on top of one set of 5
reference filter papers on the baseplate. Place the nonwoven on the
filter paper in such a way that the side of the nonwoven which is
intended to be in contact with the user's skin is uppermost. Ensure
that the electrodes in the strike-through plate are clean. Place
the strike-through plate on top of the nonwoven with the center of
the plate over the center of the test piece. Center the burette and
the funnel over the plate.
[0054] 4. Adjust the height of the funnel so that it is (5.+-.0.5)
mm above the top of the cavity in the plate (i.e., 30 mm above the
test piece).
[0055] 5. Ensure the electrodes are connected to the timer.
Activate the timer and set the clock to zero.
[0056] 6. Fill the burette with simulated urine. Keep the discharge
valve of the funnel closed and run 5.0 ml of liquid from the
burette into the funnel.
[0057] 7. Open the magnetic discharge valve of the funnel to
discharge 5.0 ml of liquid. The initial flow of liquid will
complete the electrical circuit and start the timer. It will stop
when the liquid has penetrated into the nonwoven and fallen below
the level of the electrodes in the strike-through plate.
[0058] 8. Record the time indicated on the electronic timer.
[0059] 9. Repeat for the required number of test pieces. (A minimum
of 10 tests on test pieces from each sample is recommended.)
[0060] The liquid transport speed was measured with a Lister device
(available from Lenzing Instruments).
EXAMPLE
[0061] Alkyl polyoxy ethylene alcohol
(CH.sub.3CH.sub.2(CH.sub.2CH.sub.2).-
sub.13CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.2.5OH) was added to a
polypropylene resin (S119, MFR=60 g/10 min., manufactured by Mitsui
Chemicals, Inc.) as a hydrophilic agent so as to be 60 weight % for
melting and kneading, thus producing a pellet of a master batch.
The MFR of the master batch was 30 g/10 min. Next, the master batch
was added thereto at a ratio of 3 weight parts to 100 weight parts
of the polypropylene resin (S119, MFR=60 g/10 min., manufactured by
Mitsui Chemicals, Inc.). The resulting mixture was melted at an
extruder and draw according to the spunbonding process for
embossing processing, thus producing a spunbonded nonwoven fabric
having 2.2 denier of fiber titer, 20 g/m.sup.2 (MFR of the resin
composition forming the nonwoven fabric was 60 g/10 min.). Heating
treatment of the nonwoven fabric was performed for an hour at
60.degree. C. and left at room temperature. As the result,
hydrophilicity was revealed after 2 hours.
[0062] In addition, the heating treatment was conducted by hanging
a piece of the nonwoven fabric (200 mm.times.250 mm) in the center
of a drier TABAI SAFETY OVEN STS222 manufactured by Espec Corp.,
operation condition: wind level 5 and temperature 60.degree. C., so
that the piece receives dry wind vertically.
[0063] Here, in case liquid transport was recognized within 10
seconds for the nonwoven fabric as measured by the liquid transport
speed specified in EDANA 150 2-93, the nonwoven fabric was
evaluated that it had hydrophilicity.
Comparative Example
[0064] Alkyl polyoxy ethylene alcohol
(CH.sub.3CH.sub.2(CH.sub.2CH.sub.2).-
sub.13CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.2.5OH) was added to a
polypropylene resin (HF461X, manufactured by Basell Inc.) as a
hydrophilic agent so as to be 60 weight % for melting and
compounding, thus producing a pellet of a master batch. The MFR of
the master batch was 400 g/10 min. Next, the master batch was added
thereto at a ratio of 3 weight parts to 100 weight parts of the
polypropylene resin (S119, MFR=60 g/10 min., manufactured by Mitsui
Chemicals, Inc.). The resulting mixture was melted at an extruder
and draw according to the spunbonding process for embossing
processing, thus producing a spunbonded nonwoven fabric having 2.2
denier of fiber titer, 20 g/m.sup.2 (MFR of the resin composition
forming the nonwoven fabric was 60 g/10 min.). Heating treatment of
the nonwoven fabric was performed for an hour at 60.degree. C. and
left at room temperature. As the result, no hydrophilicity was
revealed even after 2 weeks have passed.
INDUSTRIAL APPLICABILITY
[0065] Conventionally, in case of heat embossing processing, as
hydrophilic ability becomes devitalized due to thermal history
thereof, use of goods such as disposable diapers and the like has
been restricted. However, the hydrophilic nonwoven fabric of the
present invention, which has excellent heat resistant
hydrophilicity, can be properly used for medical purposes, sanitary
purposes, packaging materials, industrial materials and the like
according to the present invention. Specifically, the nonwoven
fabric of the present invention can be applied to sheets, pet
sheets, soup absorbing sheets such as vegetable, drip sheets,
gowns, steamed hand towels, pap materials, labor cloths, wipers,
wet tissues, gauzes, dish cloths, towels, hip wipers, toilet
cleaners, flooring cleaners, range cleaners, make up removers,
glass cleaning and the like. In particular, the nonwoven fabric can
be preferably used as members of disposable diapers and sanitary
napkins.
* * * * *