JP2533260C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven composite fabric containing pulp fibers and intertwined by hydraulic pressure.
Is what you do. The present invention also relates to a method for producing a nonwoven composite fabric. [0002] It is known that nonwoven webs of pulp fibers have absorbency.
Non-woven webs consisting solely are not suitable for certain applications, such as abused wipes
It may be. The reason for this is that such nonwoven webs have increased strength and abrasion resistance.
Because they are missing. In the past, pulp fiber webs were coated with a binder on the outside.
Reinforced by fabric. For example, one of the wet webs of pulp fibers
Or higher strength by printing the binder on the surface
We have created absorbent wipes with In a typical case, the outer
The toughened wipe contains up to about 25% binder by weight. So high
Including a concentration of binder will increase the price. Also, during use
Streaks remain, which is undesirable for applications such as automotive painting.
A surface is created. In addition, the wiping cloth reinforced in this way can be replaced with a specific volatile agent.
Alternatively, when used with semi-volatiles, the binder may leach. [0003] Pulp fibers and / or pulp fiber webs are nonwoven spunbonded webs.
, Meltblown webs, scrim materials, and woven materials.
You. One known technique for mixing these materials is hydraulic entanglement.
There is a law. For example, U.S. Pat. No. 4,808,467 to Suskind
The issue includes wood pulp and text entangled with a continuous filament base web.
A high strength nonwoven fabric comprising a mixture of tile fibers is disclosed. Pulp fiber
Laminating a woven or knitted web and / or a non-woven web can be performed by using Shambe.
This is disclosed in Canadian Patent No. 841,398 to Lan. This patent
According to, the untreated paper layer is separated into continuous fillers using a high-pressure jet stream.
It is intertwined with the base web such as the ment web. [0004] In European Patent Application No. 128,667, entanglement with an upper side and a lower side is described.
A composite fabric made by lamination is disclosed. The top side is the printed reprint
It is disclosed as being formed from a loopable paper sheet.
On the other side is a base textile layer, such as a continuous filament nonwoven web.
Are disclosed. According to this patent application, each layer
Entangle the fibers of the pulp layer with the fibers of the base layer using a water column jet
By being connected to each other. [0005] These documents are of interest to those engaged in underwater jet entanglement of fiber materials.
It has high strength and high abrasion resistance, but is used as a high-strength wiping cloth
No mention is made of the need for high pulp content nonwoven composite fabrics. Rapidly
Inexpensive and strong enough to absorb water, water-like liquid or oil several times its own weight
There is still a need for a degree of wiping cloth. Also, several times its own weight quickly
Can absorb water, water-like liquids or oils, and has a short average fiber length
There is still demand for high-pulp, high-pulp reinforced wipes with a high fiber content
Are there. Personal care product that can be used as a wipe or absorbable
Pulp-rich composite fabric that can be used as a fluid dispersion layer and / or absorber
There is a demand for Furthermore, the practical use of non-woven composite fabrics with high pulp content
There is also a demand for a new manufacturing method. Among these demands are short average fiber lengths.
There is also a need for a method of making composite fabrics containing a high proportion of fibers. This
It is important to meet such demands. Because high quality virgin wood fiber
Use secondary (ie, recycled) fiber pulp with short average fiber length instead of pulp
This is desirable both economically and in terms of environmental protection detection. (Definition) In the present specification, the “longitudinal direction” means that when forming an absorbent nonwoven web,
Refers to the direction in which the surface to be deposited is formed. In this specification, the “horizontal direction” refers to a direction orthogonal to the “vertical direction”. As used herein, the term "pulp" includes natural fibers such as trees or plants other than trees.
Pulp. "Tree" refers to, for example, deciduous or coniferous trees. "The tree
"External plants" include, for example, cotton, flax, espart, milkweed, straw, ju
Toto Asa and Bagasse. In the present specification, the “average fiber length” refers to Kajaani Oy Electr.
Kanici Fiber Analyzer (model
No. FS-100) is the average length of the weighed pulp fiber determined using
. According to the test procedure, a sample of the pulp is treated with the dissociation solution,
That is, no binding fibers are present. Each pulp sample is put in boiling water and decomposed
And diluted with about a 0.001% solution. Approximately from the dilute solution as each test sample
Fifty to 100 milliliters are sampled and tested using the fiber analyzer described above.
Is performed. The measured average fiber length can be expressed by the following equation. [0008] Where k = maximum fiber length x _i = Fiber length n _i = Length x _i N = total number of fibers measured. As used herein, “pulp having a short average fiber length” refers to a large amount of short fibers and non-fibers.
Pulp that contains particles, such a large amount of short fiber and non-fiber particles are present
A relatively tight, impermeable paper sheet or non-woven web
Are not preferred where absorptivity or rapid liquid inhalation is required. Many secondary wood fiber pulps are considered to be pulp with a short average fiber length.
However, the quality of secondary wood fiber pulp depends on the quality of recycled fiber and pretreatment.
It depends on the format and degree. Pulp with a short average fiber length is suitable for optical fiber analyzers such as
The average fiber length was about 1.2 as measured by the above-mentioned FS-100 type fiber analyzer.
mm or less. For example, pulp with a short average fiber length has an average fiber length of
It has about 0.7 to 1.2 mm. An example of pulp with a small average fiber length is
Gin hardwood pulp, or office waste, newsprint, paperboard, etc.
And secondary fiber pulp. In the present specification, “pulp having a long average fiber length” refers to a relatively small amount of short fibers.
Pulp containing non-fibrous particles, such a small amount of short fibers or non-fibrous particles
If not present, a relatively slow, permeable paper sheet or non-woven web could be formed.
Bitter, these are preferred where absorption or rapid liquid inhalation is required
Things. Pulp with a long average fiber length is generally non-secondary fiber (ie, bar
Gin fibers). Sorted secondary fiber pulp also has a long average fiber length
. The pulp having a long average fiber length is an optical fiber analyzer, for example, the FS-100 type fiber described above.
It has a length of about 1.5 mm or more as an average fiber length as measured by a fiber analyzer or the like.
For example, pulp having a large average fiber length has an average fiber length of about 1.5 to about 6 mm.
Have. Examples of pulp having a long average fiber length among wood pulp fibers include, for example,
Virgin softwood fiber pulp, bleached or unbleached. As used herein, the term “spunbonded filament” refers to a small diameter chain.
Continuous filament, which melts the thermoplastic material into the spinneret
Multiple fine and usually circular in gold, the same diameter as the extruded filament
Extruded from the capillary as a filament, and then by suction withdrawal and / or
By using other well-known spun bonding mechanisms, etc., the diameter can be rapidly reduced.
It was formed. The production of spunbonded nonwoven webs involves, for example, A
U.S. Patent No. 4,340,563 to Dorpel.
And the like. U.S. Pat. No. 3,692,618 to U.S. Pat. The disclosures of these patents are incorporated herein by reference. An object of the present invention is to provide a non-woven composite fabric having a high pulp content.
It is to satisfy each requirement. [0014] The composite fabric of the present invention contains about 70% or more by weight of wood pulp fiber.
Wood pulp fiber is composed of high average fiber length pulp with average fiber length
A mixture of low-average fiber length pulp with a fiber length of less than 1.2 mm, about 30% of the fabric weight
Less than a nonwoven continuous filament is hydraulically entangled with the support. Non-woven
Support for continuous filaments is greater than 100 bonds per square inch
It has a density and a total bond area of about 2 to about 30 percent. For example, the present invention
The nonwoven composite fabric of about 10 to about 25% by weight of a nonwoven continuous filament substrate;
It may also contain from about 75 to about 90% by weight pulp fiber. [0015] The nonwoven support of continuous filaments may be a nonwoven of continuous spunbonded filaments.
It may be a web. In one aspect of the invention, the nonwoven continuous filament
Support material has a total bond area (as measured by optical microscopy)
Bond locations of less than about 30% and bond density of about 100 bins per square inch
The above may be adopted. As an example, the support for this nonwoven continuous filament
Have a total bond area in the range of about 2 to about 30% and a bond density of about
It can be from 100 to about 500 pins / in 2. With another example
Thus, the total bond area of the nonwoven continuous filament support may be from about 5 to about 20.
% And the bond density ranges from about 250 to about 350 pins / in 2.
Can be [0016] The pulp fiber element in the composite nonwoven fabric of the present invention may be a tree and / or a plant other than wood.
Fiber pulp. The pulp may be a mixture of different types and / or amounts of pulp fibers. As an example, in one embodiment of the present invention
Pulp with a short average fiber length of about 50% or more by weight and less than 50% by weight
Have a pulp containing pulp with a long average fiber length (virgin softwood pulp, etc.)
You. Pulp with a short average fiber length is defined as having an average fiber length of less than about 1.2 mm.
Wear. For example, pulp having a short average fiber length has a fiber length of about 0.7 to about 1.2.
mm. Pulp with a long average fiber length has an average fiber length of about 1.5 mm or more
Can be defined. For example, this pulp having a long average fiber length has a fiber length of about 1.5 to 1.5.
It is about 6 mm. An exemplary fiber mixture has a short average fiber length of about 75% by weight.
Pulp and pulp with a long average fiber length of about 25% by weight. According to the present invention, pulp having a short average fiber length is used for newsprint, recycled paperboard, and office waste.
Virgin hardwood pulp of a certain quality obtained from products and low quality secondary (
That is, (recycled) fiber pulp. Fiber pulp with a long average fiber length
Can be white virgin softwood pulp or unbleached virgin softwood pulp
it can. [0018] The present invention relates to a method for converting nonwoven composite fabrics into small amounts of materials, such as binders, surfactants, crosslinkers.
, Release agents, burn retardants, wettable powders and / or pigments, etc.
I have. Instead of and / or in addition to performing such processing
In addition, the present invention relates to various particles, such as activated carbon, clay, starch, and superabsorbents.
It is also intended to add the collector to the nonwoven composite fabric. The nonwoven composite fabric of the present invention is a durable wipe or absorbent personal care product.
Can be used as a fluid dispersion material. In one embodiment,
The nonwoven composite of the present invention can be weighed from about 20 to about 200 grams per square meter.
Single-ply or multi-ply wipes up to gsm
You. By way of example, the basis weight of such a wipe is from about 25 to about 150 gsm.
And, more particularly, in the range of about 30 to about 110 gsm. Such payments
The water absorption of the wipe is about 450% or more, the oil absorption is about 250% or more, the water suction speed is about 2.0 cm or more per 15 seconds in the vertical direction, and the oil
It is desirable that the suction speed be about 0.5 cm or more per 15 seconds in the vertical direction.
Good. When used as a fluid treatment material in personal care products,
The properties of the nonwoven composite fabric of the invention can be the same as those of the wiping cloth, except that
Weighs from about 40 to about 170 gsm, for example, from about 60 to about 12 gsm.
The range is up to 0 gsm. In addition, non-woven composites of one or more layers
Can be used as an absorbent element in personal care products using fabric, especially
, A superabsorbent is additionally used. When used as an absorbing element,
The weight of the nonwoven composite cloth is about 100 gsm or more, and this is
Can also be used as For example, the weighing of this non-woven composite
To about 350 gsm. The present invention further relates to a method for producing a non-woven composite fabric having a high pulp content.
You. The method of the present invention provides for a layer of pulp fibers having a total bond area of less than about 30 percent.
Full, non-woven continuous filler with bond density of about 100 pin bond positions / in 2 or more
These layers are superimposed on the
Forming a composite material and then drying the composite material. According to the present invention, the nonwoven continuous filament is formed by a wet forming method or a dry forming method.
The layers are superimposed by depositing pulp fibers on
You may do it. Superposition of each layer cohesive the support layer of the nonwoven continuous filament
Pulp fiber. As cohesive pulp fiber
For example, repulpable paper sheets, repulpable tissues
And pulp made of wood pulp fiber. The drying of the nonwoven composite fabric entangled by water pressure utilizes an incompressible drying process.
Can be done. Drying in air has been found to be particularly preferred. other
Available drying methods include infrared radiation, Yankee dryer, steam can, vacuum
There are water method, ultrasonic and ultra high frequency energy. FIG. 1 shows a processing apparatus for forming a non-woven composite fabric having a high pulp content by number 10.
Are schematically shown as In the present invention, the diluted suspension of pulp fiber is
Supplied from the feed box 12 and placed on the forming cloth 16 of a conventional papermaking machine.
4 and is evenly distributed. Pulp fiber suspensions are common in traditional papermaking processes
It can be diluted to the concentration used typically. For example, the suspension is about 0.1
To about 1.5% by weight of pulp fibers suspended in water. This pal
The water is removed from the pulp fiber suspension to form a uniform layer 18 of pulp fibers. The pulp fiber may be pulp having a long average fiber length, or pulp having a short average fiber length.
It may be rupe or a mixture thereof. Average of pulp with long average fiber length
Fiber length ranges from about 1.5 to about 6 mm. Wood pal with long average fiber length
For example, Kimberly-Clark has purchased “Longlac 19”, “Co
"osa River 56" and "Coosa River 57"
Some are for sale. Examples of pulp having a short average fiber length include virgin hardwood pulp and secondary pulp.
There is fiber pulp (ie, recycled fiber pulp). Secondary fiber pulp
Are made from, for example, newsprint, recycled paperboard, office paper, and the like. average
Pulp having a short fiber length is generally about 1.2 mm or less in average fiber length.
Having. For example, it has a length of about 0.7 to about 1.2 mm. In a mixture of pulp having a long average fiber length and pulp having a short average fiber length,
Pulp with a short average fiber length has a significant proportion. For example, a mixture of both
Pulp having a short average fiber length of about 50% by weight or more and about 50% by weight or less
And pulp having a long average fiber length. An example of such a mixture
The pulp with a short average fiber length of 75% by weight and the average fiber length of about 25% by weight
Has long pulp. [0027] The pulp fiber used in the present invention may not be refined, or may be made from pulp.
Then, various degrees of purification may be performed. A small amount of moisture resistant resin and / or resin
Binders may be added to improve strength and abrasion resistance. Binder and
Useful as a moisture-resistant resin include, for example, Hercules Chemi
"Kymene 557H" and Amer sold by cal Company
ican Cyanamid Inc. "Parez 631" sold by
There is. Also, a cross-linking agent and / or a hydrating agent may be added to the pulp mixture. Relaxation
If a loose nonwoven pulp fiber web is required, a release agent may be added to the pulp mixture.
Alternatively, the hydrogen bonding force may be weakened. Examples of release agents include Guake Chem
Ical Company sold under the trade name "Quaker 2008"
There is something. Adding 1 to 4% by weight of the release agent to the composite material is
Or reduce the dynamic coefficient of friction to reduce the abrasion resistance of the continuous fabric rich side of the composite fabric.
It seems to increase wear. This release material is used as a lubricant or friction reducing agent.
It is determined to work. The continuous filament nonwoven support 20 is unwound from a supply roll 22 and
As the supply roll 22 rotates in the direction attached thereto, the direction indicated by the arrow
Move in the direction. The nonwoven support 20 is formed from stack rollers 28, 30
Pass through the nip portion 24 of the S-shaped roll row 26. The non-woven support 20 may be formed by a known continuous filament non-woven extrusion process, such as a known non-woven
Can be formed by the agent spinning process or the melt spinning process.
It immediately passes through the nip 16 without being wound up by a roll. This continuous file
The filament nonwoven support 20 is a continuous melt spa formed by a spunbond process.
Preferably, it is a non-filament nonwoven web. This spunbond filament
The polymer is a melt-spinable polymer or copolymer, or a blend thereof.
Can be formed from a rend. For example, spunbond filaments
Olefins, polyamides, polyesters, polyurethanes, AB and
ABA 'block copolymers (where A and A' are thermoplastic endblocks and B is an elastomeric midblock), ethylene and
Copolymers of at least one vinyl monomer (vinyl monomers include
, Vinyl acetates, unsaturated aliphatic monocarboxylic acids and their monocarboxylic acids
And esters of boric acids. ). Filament
A non-woven support when formed from a polyolefin, for example polypropylene
The basis weight of 20 goes from about 3.5 to about 70 gsm. To further mention, a non-woven support
A basis weight of 20 will be from about 10 to about 35 gsm. Polymers include pigments, antioxidants
Agents, glidants, stabilizers and other materials. One important property of the nonwoven continuous filament support is that its total bond area is
Less than about 30 percent and a uniform bond density of about 100 bonds / square inch.
It is more than j. For example, the total volume of the nonwoven continuous filament support
Area ranges from about 2 to about 30 percent (by conventional light microscopy).
The bond density is from about 250 to about 500 pin bond positions /
Square inches. In order for the total bond area and bond density to be such values, continuous
Adhesion of the fillet support should be achieved with a pin about 100 pin bond positions / square inch or more.
What is necessary is just to carry out by the shape of a bond pattern.
Approximately 30% or less when the support is completely contacted with a smooth anvil roll
Is formed. The bond pattern is a smooth anvil
When contacted with a roll, the pin bond density is from about 250 to about 350 pins / square.
Inches, with a total bond strength of about 10 to about 25 percent
New An example of this bond pattern is shown in FIG. 2 (714 pattern). This
Has a pin density of about 306 pins / in 2. Each pin is approximately
It forms a square bond surface with a side length of 0.025 inches. Each pin is smooth
When in contact with the anvil roll, it is about 15.7 percent total bond
Form a surface area. A heavily weighed support generally has a bond surface close to this value.
Have a product. A low weighed support generally has a small bond area. FIG. 3 shows another bond pattern (WW13 pattern). Figure 3
The pin density of the lead pattern is about 278 pins / in 2. Shaped by each pin
The resulting bond surface has two parallel sides approximately 0.035 inches long (the distance between each other is approximately
0.02 inches) and two convex sides (each about 0.0075 inches radius)
Have. )have. When the pin contacts the smooth anvil roll, it
Form a total bond surface area of about 17.2 percent. Can be used in Figure 4
Another possible bond pattern is shown. The pin density of the pattern of FIG.
3 pins per square inch. The square bond surface formed by each pin
It has a side length of about 0.043 inches. These pins have smooth anvil rolls
Contact, they form a total bond surface area of about 16.5 percent
Is done. Although the pin bonding formed by the thermal bond roll has been described above, the present invention
, Including all forms of bonding that can bond filaments well with minimal bond area
It is. For example, using thermal bonding and latex impregnation, with a minimum bond area
The desired bonding of the filaments can be formed. Instead of doing this
And / or additionally a resin, latex or adhesive, for example
Spray or print on nonwoven continuous filament web and dry
By doing so, a desired bond can be formed. [0032] The layer 18 of pulp fibers is then coated with a perforated confounding surface in a conventional hydraulic confounding mechanism.
It is placed on a non-woven support 20 on 32. Pulp layer 18 for hydraulic confounding
Is preferably located between the manifold 34 and the nonwoven support 20. this
The pulp fiber layer 18 and the nonwoven support 20 may be used for one or more hydraulic entanglements.
Passing below the manifold 34, it is treated by a fluid jet to produce pulp.
The fibers are entangled with the filaments of the continuous filament nonwoven support 20
You. The fluid jet causes the pulp fibers to enter the interior of the nonwoven support 20, or
Penetrates it, thereby forming the composite material 36. Alternatively, the pulp fibers 18 and the non-woven support 20 may be the same where wet deposition is performed.
Hydraulic entanglement while on top of a perforated screen (ie mesh cloth)
You may do so. In addition, the present invention relates to a method in which a dried pulp sheet is continuously filamentized.
Over the non-woven support and replace until a consistent consistency is achieved.
After this, the pulp sheet thus restored should be hydraulically entangled.
Also included. Hydraulic entanglement may be performed while the pulp fiber layer 18 is highly saturated with water.
. For example, immediately prior to hydraulic entanglement, a maximum of about 90 weight percent
Water may be included. Instead, the pulp fiber layer 18 is
It can also be an aerial layer of dry fibers or a dry layer. It is desirable to hydroentangle the wet-laid layer of pulp fibers. The reason for this is
Pulp fibers without being hindered by “par” bonds (sometimes called hydrogen bonds)
The fibers can be embedded and / or entangled in a continuous filament support
This is because that. Because the pulp fiber is kept in a hydrated state
. "Paper" bonding enhances the abrasion resistance and tensile properties of high pulp content composite fabrics.
It seems to improve. For performing hydraulic confounding, see US Pat. No. 3,485,706.
Such conventional hydraulic confounding equipment may be used. The contents of this patent specification
Be part of. The hydraulic confounding of the present invention can be performed using a suitable working fluid such as water.
Can be. The working fluid flows through the manifold where the fluid is
It is dispersed in a group of holes or orifices. The diameter of these holes is about 0.00
3 to about 0.015 inches. For example, in implementing the present invention,
default, Honeycomb Systems Inc., Maine
It is possible to use an manufactured manifold.
Has a strip of orifices with a diameter of 0.007 inches, 30 holes per inch,
Holes. Use various other manifold structures and combinations
be able to. For example, a single manifold may be used, or a plurality of manifolds may be continuously arranged. In a hydraulic entanglement process, the working fluid is from about 200 to about 2000 pounds / square.
Flow through the orifice at a pressure of inch gauge (psig). Above this pressure
In the side area, treat the composite fabric at a speed of about 1000 feet per minute (fpm)
Intended to be. Fluid impinges on pulp fiber layer 18 and nonwoven support 20
I do. These have, for example, a mesh size of about 40 × 40 to about 100 × 100
Supported by a perforated surface of a single planar mesh in the range Perforated surface
Is a multi-size with a mesh size ranging from about 50x50 to about 200x200.
It can also be a ply mesh. In the process of water jet treatment,
The vacuum slot 38 is directly connected to the hydraulic needling manifold.
Below or directly below the perforated confounding surface 32 downstream of the confounding manifold.
So that excess water is sucked from the composite material 36 which has been entangled by water pressure.
It may be. Nothing is based on a particular theory of operation, but a deposit is placed on a nonwoven continuous filament support.
The columnar jet of working fluid that directly impacts the piled pulp fibers
Fibers into a support matrix or filament non-woven network,
Alternatively, it is considered to act to partially penetrate. Fluid jet
And the pulp fibers have the bond characteristics described above (and from about 5 microns to about 40 micron).
Interact with nonwoven continuous filament webs having a denier in the range of
Pulp fibers also become entangled with the filaments of the nonwoven web
The pulp fibers are intertwined with each other. Loose bonding of nonwoven continuous filament support
In the case of breaking, the filaments move easily as a whole and fix the pulp fiber.
Cannot form a cohesive matrix. Meanwhile, the total bond surface of the support
If the volume is too large, the penetration of pulp fibers hardly occurs. And even bond
If the area is too large, the fluid jet hits a large, non-porous bond spot
Scattered in the case, washing away the pulp fibers, resulting in a stained composite cloth
It can also cause A certain level of adhesion forms a coherent support, which is entangled by hydraulic pressure on only one side, thereby allowing the pulp fiber to be duplicated.
It becomes plywood. Moreover, such a specific level of adhesion provides the desired dimensional security.
Able to form a strong and useful cloth as well as a composite cloth with qualitative properties
You. In one embodiment of the invention, a fluid jet impinging on the pulp layer and the support is provided.
The pulp fibers are continuously filtered to adjust the energy of the pulp and improve both sides of the fabric.
It may be sunk into the lament support and entangled. Ie
By adjusting the entanglement, the density of pulp fibers on one side of the cloth
Increase and decrease the density of the pulp stream on the opposite side. like this
The configuration is especially for special purpose wipes and disposable diapers, women's pads, adults
Useful for personal care products such as incontinence products. Instead of continuous
The filament support is entangled with the pulp fiber layer on one side and
By entangled with pulp fiber layers with different sides, both sides contain a large amount of pulp.
A composite fabric may be formed. In such a case, both sides of the composite cloth
It is desirable to perform hydraulic confounding on the surface. After finishing the treatment by the fluid jet, the composite cloth 36 is subjected to a drying treatment in an uncompressed state.
Move to Hydraulic need of material using pick-up rolls 40 of different speed
You may convey from a ring belt toward a non-compression drying process. Instead of this,
May be used. If necessary, composite cloth
May be wet creeped prior to being conveyed to the drying step. Ue
In order to perform non-compression drying of the blade, a conventional rotary
A ram-through air drying device may be used. This through dryer 42
An outer fan for receiving hot air blown through the hole 46 together with the hole 46.
Can be an outer rotatable cylinder 44 with a card. Through dry yabe
The belt 50 carries the composite cloth 36 onto the upper part of the through-drier outer cylinder 40.
Send. The air blown out from the hole 46 of the outer cylinder 44 of the through dryer 42
The heated air removes water from the composite fabric 36. The temperature of the air blown against the composite cloth 36 by the through dryer 42 is from about 200 degrees Fahrenheit to about 50 degrees Fahrenheit.
The range is 0 degrees. Other useful through-drying methods and equipment are described, for example, in the United States.
See patents 2,666,369 and 3,821,068.
These contents are part of the contents of the present invention. The finishing process and / or the post-processing process are performed to provide the composite fabric 36 with predetermined characteristics.
It is desirable to impart the property. For example, lightly wrap this cloth with a calendar roll
Uniform appearance, by compression, creeping or brushing, and
And / or may impart a certain tactile property. Alternatively and / or this
In addition, chemical after-treatments, such as adhesives and dyes, may be added to the fabric. In one embodiment of the present invention, the fabric is provided with various materials, such as activated carbon, clay,
Starch and superabsorbent materials may be added. For example, these materials are
It may be added to the pulp fiber suspension used to form the fibrous layer. These materials
Is added to the pulp fiber layer prior to treatment with the fluid jet to provide a fluid jet.
These materials may be inserted into the interior of the composite cloth by the action of the above.
Alternatively and / or in addition, these materials can be converted into a fluid jet.
It may be added after the processing. Before water jet treatment, remove superabsorbent material
When added to a pulp fiber suspension or pulp fiber layer, as a superabsorbent
Inactive during wet forming and / or during water jet treatment,
It is preferable to be of a type that is in an active state. After water jet treatment,
Conventional superabsorbent materials may be added to the composite fabric. Useful superabsorbents include, for example,
The product name is Hoechst Cel as "Sanwet IM-5000 P"
Sodium polyacryle available from anase Corporation
There is a salt superabsorbent. The amount of super absorbent is 100 grams of pulp fiber in the pulp fiber layer
It can be up to about 50 grams per. For example, non-woven webs
It may contain from about 15 to about 30 grams of superabsorbent per 100 grams of fiber.
More specifically, the nonwoven web weighs about 25 grams per 100 grams of pulp fiber.
Of superabsorbents. FIG. 5 shows a cross section of a high pulp content nonwoven composite fabric taken as an example 50.6.
It is a microscope photograph at the magnification. FIG. 6 shows a non-woven composite fabric with a high pulp content as an example.
5 shows a cross section after post-processing by a cold embossing pattern roller in FIG.
It is a microscope photograph of 0.6 times. As can be seen from these FIGS. 5 and 6, the nonwoven
The composite fabric is reinforced internally by a continuous filament nonwoven web, or
Contains a web of physically reinforced pulp fibers. This allows the outer reinforcement
For example, printing of a binder or an adhesive becomes unnecessary. In the present invention,
By using a material that is internally or integrally reinforced,
Short pulp fibers can be used. Treating such low-grade fibers with a release agent
Changes the properties of the material, without compromising the strength and / or wear resistance
A softer, more cloth-like material can be formed. Figure 7 shows an absorbent structure incorporating a non-woven composite fabric with a high pulp content as a liquid dispersant.
1 is an exploded perspective view of an example of a body 100. FIG. FIG. 7 simply shows the relationship between each layer of the absorbing structure.
And, in any way, these layers in a particular product.
(Or other layers) is not limited to being formed in this manner
. For example, having fewer or more layers than shown in FIG.
May be. The absorbent structure 100 shown here is a disposable diaper and a pad for women.
Is suitable for use in other nursing supplies, etc., and consists of four layers. That is,
The top layer 102, the fluid dispersion layer 104, the absorption layer 106, and the bottom layer 108. Summit
The sub-layer 102 may be a non-woven web of melt spun fibers or filaments,
Or embossed net. The top layer 102 is
Functions as a liner for disposable diapers, or for women's pads, nursing products, etc.
Functions as a cover layer. The upper surface 110 of the top layer 102 has the absorbent structure 100 thereon.
This is the part that comes into contact with the user's skin. The lower surface 112 of the top layer 102 has a high pulp content
Overlying a fluid distribution layer 104 of a non-woven composite fabric of high modulus. Liquid dispersion layer 1
04 quickly absorbs fluid from the top layer 102 and
It has a function of dispersing the fluid and discharging the fluid to the absorption layer 106. Flow
Body dispersion layer 104 has an upper surface 114 that is in contact with lower surface 112 of top layer 102. Further, the fluid dispersion layer 104 is overlaid on the upper surface 118 of the absorption layer 106.
It has a lower surface 116. The fluid dispersion device 104 has a different size from the absorption layer 106.
Size or shape. Absorbing layer 106 is pulp fluff, super absorbent
Or a layer of a mixture thereof. The absorbing layer 106 is a liquid
It is superimposed on the impermeable bottom layer 108. The absorbing layer 106 is liquid-impermeable
The lower surface 120 is in contact with the upper surface 122 of the conductive bottom layer 108. Bottom layer 1
08 forms the outer surface of the absorbent structure 100. Usually used
In other words, the liner layer 102 is a topsheet and a fluid impermeable bottom layer.
108 is a back sheet, the fluid dispersion layer 104 is a dispersion layer, and the absorption layer 106
Is an absorbent core. Before or after bonding each layer to other layers
To match the shape of a particular product. When the layers are combined to form a product, such as a female pad, the high pulp content
The non-woven composite fabric fluid distribution layer 104 of the percentage comprises a fluid retained in the top layer 102.
It has the advantage of being reduced. This allows the absorbent layer 106 to be removed from the wearer's skin.
Transfer of the fluid to the skin of the wearer is promoted by the moisture inside the absorbent layer 106 and the skin of the wearer.
By dispersing the fluid in the bulk of the absorber
It becomes possible to use the absorption layer 106 more efficiently. These advantages are vertical
This is due to the improvement of the suction rate and the moisture absorption characteristics. One embodiment of the present invention
In one embodiment, the fluid dispersion layer 104 comprises the top layer 102 and / or the absorbent layer 106.
Can also function. Nonwoven composites particularly useful for such configurations
The fabric is mainly formed by a pulp-rich surface and a continuous filament support
And a cloth having a curved surface. Experimental example Using an Instron Model 1122 Universal tester
US Test Method Standard No. Tensile strength and elongation according to Method 5100 of 191A.
Measurements were performed. The tensile strength is the maximum load when the sample is stretched until it breaks.
Weight (peak load). Maximum load measurement is a commercial method of wet and dry samples
For the vertical and horizontal directions. Each sample is 3 inches wide and 6 inches long, and the unit of the test result is gram weight. “Elongation” or “elongation percentage” refers to the initial length of a nonwoven web before stretching and after stretching.
Is measured in specific units and the difference is measured as the initial length of the nonwoven web before stretching (
Divided by the same unit). If the elongation is expressed in “%”, multiply by 100.
The elongation was measured when the web reached approximately its break point. The measurement of the trapezoidal tear strength was performed according to ASTM Standard Test D 1
117-14, except that the tear load was reduced to the lowest maximum load.
Initial maximum load and highest maximum load, not as an average of weight and highest maximum load
It is calculated as the average value of the weights. Measurements of particles and fibers taken from the sample cloth were made according to INDA Standard
In accordance with the rd test 160.0-83, the Climet Lint test
The difference was that the sample dimensions were 6 inches instead of 7 inches x 8 inches.
That is, the size was set to inches × 6 inches. Measurement of water and oil absorption capacity of samples should be performed using industrial and engine towels and wipes
US Test Method Standard No. Line according to UU-T-595C
Was. Absorbency is the ability of a material to absorb liquid over a period of time,
Is the total amount of liquid retained in the material. The absorption power is
It is determined by measuring the increase in weight of the material due to Percentage absorption
To display the weight, the weight of the absorbed liquid is calculated by the weight of the sample according to the following formula.
You just need to break it. Total Absorbency = [(Saturated Sample Weight−Sample Weight) / Sample Weight] × 100 The measurement of the water and oil wicking rate of the sample is determined by TAPPI Method U
Performed according to M451. The wicking rate is vertical by the strip of absorbent material
It is the speed of water sucked up in the direction. The weighing of the sample was determined essentially according to ASTM D-3776-9
However, the following points are different. 1) The dimensions of the sample were 4 inches x 4 inches square
. 2) The total weight of the nine samples was measured. The coefficient of friction was measured according to ASTM 1894. The drape stiffness of the sample was measured according to ASTM D1383,
The dimensions of the sample were 1 inch × 8 inches. A sample was measured for a cup crush test. This cup crash test
Means that a cup-shaped cloth is surrounded by a cylinder with a diameter of about 6.5 cm, and a uniform deformation state is maintained.
A 9 inch x 9 inch piece of cloth approximately 6.5 cm in diameter
To crush into a 6.5 cm inverted cup, a 4.5 cm diameter hemispherical foot
It is evaluated by measuring the required maximum load. Align foot and cup
Contact between the side of the cup and the foot, which could affect the maximum load
Was avoided. The maximum load was measured by measuring the foot at about 0.25 inch / second (15 inch / second).
Minutes) while descending at the speed of Tennsauken, NJ
Model FTD-G- available from Scheatz Company
Performed using a 500 load cell (500 gram range). The determination of sample bulk (ie, thickness) was determined by Waltha, Mass.
m. C. Ames Thic available from Ames Company
Using a Kness Tester Model 3223, 5
The test was performed by attaching an inch × 5 inch foot. 182 grams of bulk for each sample
The test was carried out at a load within the range of 5 grams above and below. The determination of the bulk of the sample was performed using TMI, Amityville, NY.
Available from Testing Machines Incorporated
2 inch diameter when working with a functional Model 49-70 thickness tester
Add about 0.2 pounds per square inch (spi) to the round foot of
went. Thickness measurements using 5/8 inch diameter feet were obtained using a TMI Mode 1 549-M thickness tester. Sample weighing
The measurement was basically performed according to ASTM D-3776-9. The Handle-O-Meter test is based on Thwing-Albert Ins
Handle-O-Meter available from the instrument Company
Mode No. Performed at 211-5. This test is based on the INDA Standard
rd Test IST 90.0-75 (R82).
The dimensions of the tool were 4 inches x 4 inches instead of 8 inches x 8 inches. The abrasion resistance test was performed by Ahib, Charlotte, NC.
a-Mathis abrasion tester Model No. 103. test
The method was performed according to ASTM, applying a pressure of 12 kPa (kPa).
. For pulp-rich surfaces of the composite, abrasion tests show that this pulp is
The number of cycles required to make a 1/2 inch hole in the volume included was measured. cloth
150 cycles of test on the surface of the continuous filament
And fluffing (rise of fiber) on the surface, pilling, twisting,
Alternatively, the presence of holes was examined. Compare sample to visible scale from 1 to 5
Was given a wear number. Number 5 has little or no wear
The number 1 means that the sample is worn and a hole is formed.
I have. [0053] Experimental example 1 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood fiber pulp
("L" available from Kimberly-Clark Corporation.
onglac 19 ") by wet method.
The web is spun from a 0.5 spun polypropylene spunbond filament.
Per square yard (osy) (17 gsm) web (eg, US
Nos. 4,340,563 and 3,692,618.
It was manufactured as follows. ). Spunbond filament bonding to a smooth anvil roll with approximately 103 pin bond positions / square inch
Using a pattern that forms a maximum bond area of about 16.5 percent when contacted
I went. The laminate having a total weight of about 90 gsm obtained in this manner was
The composite material was formed by entanglement by water pressure using a hold. Each Maniho
One row of 0.007 inch holes at a density of 30 holes per inch
The equipped jet strip was placed. 650 psi water pressure in the manifold
(Gauge). Pass each layer under the manifold at a speed of about 20 fpm
Supported on a 100 mesh stainless steel forming wire. This compound
The plywood was dried using a common through-air drying apparatus. Maximum load, maximum strain (
That is, the elongation) and the maximum total absorbed energy were measured and are shown in Table 1. [0054] Experimental example 2 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood fiber pulp (K
“Lon” available from the memberly-Clark Corporation
A web of 73 gsm consisting of Glac 19 ") was formed by a wet method.
The web was spun from 0.6 oz.
Conveyed over a square yard (osy) (20 gsm) web. Delawar
Hercules Chemical Co, Wilmington, e
mpany available from K. mpany called "Kymene 557 H"
The heavy duty resin was added to the pulp fibers at a rate of 5 dry pounds per ton of dry fiber.
Spunbond filament bonding to approximately 306 pin bond positions / square inch
Has a maximum bond area of about 16% when in contact with a smooth anvil roll
Was performed using a pattern for forming The total weight obtained in this way is about 90 gs
m, using four manifolds to entangle by water pressure
The material was formed. Each manifold has a density of 30 holes per inch.
A jet strip with a row of 007 inch holes was placed. Manihole
The water pressure in the gutter was 700 psi (gauge). Each layer is machined at a speed of about 30 fpm.
Forming wire made of 100 mesh stainless steel passing underneath the manifold
Supported on ears. The composite cloth was dried by passing through a steam can roller. The fabric after drying was subjected to cold embossing. Measure physical properties of composite fabric
Table 1 shows the results. [0055] Experimental example 3 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood fiber pulp (K
“Lon” available from the memberly-Clark Corporation
A web of 76 gsm consisting of Glac 19 ") was formed by a wet method.
The web was treated with 0.4 oz.
Conveyed over a square yard (osy) (14 gsm) web. Hercule
s "Kymene 557" available from the Chemical Company
H ”of wet dry strength resin at 5 dry pounds per ton of dry fiber.
A proportion was added to the pulp fiber. Additionally, a release agent (Consho, Pennsylvania)
Obtained from the Quaker Chemical Company at Hocken
Possible "Quaker 2008") at 90 dry pounds per ton of dry fiber
A proportion was added to the pulp fiber. Approximately 306 pins
About 16 when in contact with a smooth anvil roll.
This was done with a pattern that produced a percent maximum bond area. Like this
The laminated body having a total weight of about 90 gsm obtained in
The composite material was formed by entanglement by water pressure, depending on the procedure. This composite cloth
Was dried by passing through a steam can roller. Cold to dry cloth
Embossed. The physical properties of the composite fabric were measured and the results were listed in Table 1.
is there. [0056] Experimental example 4 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood fiber pulp (K
“Lon” available from the memberly-Clark Corporation
A web of 73 gsm consisting of Glac 19 ") was formed by a wet method.
The web was spun from a 0.5 oz.
Conveyed over a square yard (osy) (17 gsm) web. The spunbonded filament bond should be smooth, with approximately 103 pin bond positions per square inch.
Forms a maximum bond area of about 16.5% when contacted with the roll
This was performed using a pattern. The thus obtained laminate having a total weight of about 90 gsm
Under the same conditions as in Example 1 using three manifolds
To form a composite material. Philad, Pennsylvania
from Rohm & Haas Company of Elphia.
The adhesive available as "hoplex (R) B" is applied to the composite fabric by about
Sprayed at a rate of 0.9 gsm (to about 1% by weight of 90 gsm cloth). This
Was dried using a general through-air drying apparatus. Maximum load, maximum
The strain (ie the amount of elongation) and the maximum total energy absorption were measured and listed in Table 1.
It is. [Table 1] [0058] Experimental example 5 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood fiber pulp ("L" available from Kimberly-Clark Corporation)
onglac 19 ") by wet method.
The web is spun from a 0.5 spun polypropylene spunbond filament.
Conveyed over the web per square yard (osy) (17 gsm). Spunbon
Has approximately 103 pin bond positions / square inch,
Forms a maximum bond area of about 16.5% when contacted with an anvil roll
The test was performed using the following pattern. The product thus obtained has a total weight of about 89 gsm.
The layers are entangled by water pressure using four manifolds to form a composite material.
Formed. Each manifold has a density of 30 holes per inch, 0.007.
A jet strip with a row of inch holes was placed. In the manifold
The water pressure was 650 psi (gauge). Manifold each layer at a speed of about 20 fpm
On a 100 mesh stainless steel forming wire passing underneath the screen
Supported. This composite cloth was dried using a general through-air drying apparatus. This
The physical and absorption properties of the fabrics were measured. Table 2 shows the measurement results. [0059] Experimental example 6 A high pulp content nonwoven composite fabric was prepared as described for Example 5.
. However, the weighing of the cloth is about 82 gsm, and an inter mesh grooved roll is used.
And made it mechanically flexible. The physical and absorption properties of the fabric were measured. Measurement
The results are listed in Table 2. [0060] Experimental example 7 A high pulp content nonwoven composite fabric was prepared as described for Example 5.
. However, the weight of the cloth was about 86 gsm, and a flower pattern was added by cold embossing.
I did. The physical and absorption properties of the fabric were measured. Table 2 shows the measurement results.
is there. [0061] Experimental Example 8 Wypall® 5 reinforced outer reinforcement available from Scott Paper Company of Philadelphia, PA.
The physical and absorption properties of the 700 "wipe were tested. The weight of this wipe is 85
gsm, about 84 weight percent creeped pulp sheet and about 16
An amount of adhesive was included on both sides of the pulp sheet. Table 2 shows the test results.
It is listed. [0062] Experimental example 9 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood pulp fiber
("L" available from Kimberly-Clark Corporation.
onglac 19 ") and about 70% by weight of southern softwood pulp fiber (Jo
Georgia Pacific Corporation, Atlanta, Georgia
"Brunswick pulp" available from Tion Corporation at about 30 weight percent
A 73 gsm web is formed from the mixture containing
0.4 ounces per square yard (osy) (1
4 gsm). Joining spunbond filaments almost
With 278 pin bond positions / square inch, when contacting a smooth anvil roll
Was performed using a pattern that formed a maximum bond area of about 17.2 percent.
The thus obtained laminate having a total weighing of about 87 gsm was connected to three manifolds.
In use, they were entangled by water pressure to form a composite material. Each manifold has
A row of 0.007 inch holes with a density of 30 holes per inch.
Cut strips were placed. Set the water pressure in the manifold to 1050 psi (gauge
). Each layer passes under the manifold at a speed of about 100 fpm.
The mesh was supported on a stainless steel forming wire. This composite cloth
It dried using the general steam can drying equipment. This fabric is cold embossed
The pattern shown in FIG. Measure the physical and absorption properties of this fabric
Was. Table 3 shows the measurement results. [0063] Experimental example 1 A non-woven composite fabric with a high pulp content was produced as follows. Northern softwood pulp fiber ("L" available from Kimberly-Clark Corporation)
onglac 19 ") to form a web of 73 gsm,
0.5 oz / square yard (o) of propylene spunbond filaments
sy) (17 gsm). Spunbond filament connection
Were performed in the pattern described in Experimental Example 9. The total scale obtained in this way
A laminate having an amount of about 87 gsm was subjected to water pressure in the same manner as in Experimental Example 9.
Entangled to form a composite material. However, in this experimental example, the water in the manifold was
The pressure was approximately 1100 psi (gauge). This composite cloth is dried in a general steam can
Dry using the instrument. This fabric is subjected to cold embossing and the pattern shown in FIG.
Was attached. The physical and absorption properties of the fabric were measured. Table 3 shows the measurement results.
There is. [0064] Experimental Example 11 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood pulp fiber
("L" available from Kimberly-Clark Corporation.
onglac 19 ") and about 30% by weight of secondary fibers (Georgia).
Of Ponderosa Fibers of America in Atlanta
Available from the branch office Ponderosa Pulp Products
BJ-deinked secondary fiber pulp) from a mixture containing about 70 weight percent
gsm web is formed, and the web is spunbonded with polypropylene.
0.4 ounces per square yard (osy) (14 gsm) web of
Conveyed up. The bonding of spunbond filaments was performed using the pattern described in Experimental Example 9.
This was performed using The laminate having a total weight of about 87 gsm obtained in this way was
The composite was formed by entanglement by hydraulic pressure as described in Example 9. Only
However, in this experimental example, four manifolds were used. This composite cloth is commonly used
It dried using a steam can drying device. FIG. 8 shows a cold embossing process for this cloth.
The pattern shown in the figure was attached. The physical and absorption properties of the fabric were measured. Measurement
The results are listed in Table 3. [0065] Experimental Example 12 A non-woven composite fabric with a high pulp content was produced as in Example 10. Only
In the present embodiment, the pulp layer is made of northern softwood pulp fiber (Kimberly).
-"Longlac 19 available from Clark Corporation.
)) And about 70% by weight of secondary fibers (Patlan, Atlanta, Georgia).
Pond, a branch of onderosa Fibers of America
BJ-ink drainer available from erosa Pulp Products
(Fiber pulp) of about 30 weight percent. The physics of this cloth
And absorption properties were measured. Table 3 shows the measurement results. [Table 2] [Table 3] [0068] Experimental Example 13 A thin absorbent structure with a wettable cover was manufactured using: Toto
About 0.3% available from Rohm & Has Company
"TRITON (registered trademark) X102" (octyl finoxy polyethoxy)
27 gsm polypropylene stainless steel treated with a nonionic surfactant of ethanol)
Formed from panbonded polypropylene. As the intermediate layer, the weight is about 11
0 gsm high pulp content nonwoven composite fabric (approximately 20
gsm spunbond polypropylene and about 90 gsm northern softwood pulp)
Formed. As the absorbent core, 1) Super absorbency of 75 gsm polyacrylate
Two plies of 52 gsm formed by aerial deposition of two layers sandwiching a layer of particles
A double layer of a laminate composite, superimposed on a C-shape containing tissue, 2) longitudinally
Formed from streaked 169 gsm wood pulp fiber blotter paper. each
The layers measured about 1.25 inches by about 8 inches. Lay each layer on a flat horizontal surface
Absorbent structure held above. [0069] Another thin absorbent structure is provided with the same cover material, absorbent core, and intermediate layer.
About 1 weight percent dioctyl sodium sulfosuccinate surfactant
60 gsm nonwoven web consisting of meltblown polypropylene fibers treated with
It was manufactured using These two structures were tested to determine whether Kimbe, Nina, Wisconsin.
rly-Clark Corporation's Analytical Lab
The artificial physiological fluid obtained from the laboratory was measured for dispersion and absorption rate. This
Has a viscosity of about 17 centipoise at room temperature (about 73 degrees Fahrenheit) and a surface tension of
It is about 53 dynes / centimeter. A liquid of about 10 cubic cm is applied to each structure at a constant speed of 10 cubic cm / min from a height of about 1 cm.
Dropped in the center of the body. After about one hour, the length of the stain in the longitudinal direction of the fluid dispersion layer is determined.
It was measured. The larger the length of the stain is, the more desirable. It's a fluid
This is because they exhibit better dispersibility. The test results are listed in Table 4. Experimental Example 14 The thin absorbing structures of Experimental Example 13 were tested, and each structure absorbed 8 cubic cm of the artificial fluid.
The settling time was measured. Measurements were made with 1) "Lucite" (registered trademark) block
2) Performed using a test apparatus with a flat horizontal test surface. FIG. 8 shows a plane of the “Lucite” block. FIG. 9 shows this
The cross section of the block is shown. This block 200 has a base 202,
Base protrudes from the bottom surface of the block. The base 202 has a flat surface 2
04, which surface is approximately 2.875 inches long and 1.5 inches wide
, The bottom surface of the block 200. Oval opening 206 (length about 1.5
Inches and a width of about 0.25 inches) are located in the center of the block and
It extends from the top to the base 202. When the bottom of the opening 206 is closed,
206 can hold a fluid of about 10 cubic cm or more. Mark above opening 206
Indicates a liquid level of about 2 cubic cm. The funnel 208 at the top of the block is a passage
The passage 210 communicates with the oblong opening 206. Funnel 2
The fluid poured into the passage 08 enters the oblong opening 206 through the passage 210.
Flow over the test sample just below the block. Each sample was placed on a flat, level test surface and the block was placed on top of the sample.
The long axis of the oval opening is parallel to the sample length with a flat protruding base
Each sample so that it is centered on both sides and between the ends of the sample.
A pull test was performed. Adjust the weight of the block to about 162 grams,
On top, the block was loaded at a pressure of about 1 psi.
. Start the stopwatch and apply approximately 10 cubic centimeters of fluid to the Repeat (Cat. No. 13-687-20; Fischer Scientific).
(Company). Fluid fills block oval opening
And the meniscus of the fluid is 2 cubic cm, indicating that 8 cubic cm of fluid has been absorbed.
Stopped your watch when you reached the level. The test results are listed in Table 5. Experimental Example 15 Produces a thick absorbent structure with an embossed net cover from:
did. Embossed netty with weighing about 45 gsm and opening area of about 35 to about 40%
Top layer and a high pulp content nonwoven composite fabric weighing about 110 gsm (FIG. 4).
About 25 gsm spunbond polypropylene and about 90
gsm northern softwood pulp) and about 760 gsm southern softwood pulp
Fluff (Coo of Kimberly-Clark Corporation)
From the absorbent core consisting of sa River No. 54 pulp and fluff)
Configured. Cut the absorbent core approximately 2.5 inches by approximately 7.5 inches and replace the cover.
It was large enough to cover it. Another thick absorbent structure was prepared by using the same cover material, absorbent core, and
60 g of melt-blown polypropylene fiber treated with the above-mentioned surfactant
and an intermediate layer formed from a non-woven fabric of sm. Time to test two structures and disperse each artificial physiological fluid 10 cubic cm
Was measured according to the procedure described in Experimental Example 13. The results are listed in Table 6. Experimental Example 16 The structure of Experimental Example 15 was tested according to the procedure of Experimental Example 14, and each structure was tested.
The time taken for the body to absorb 8 cubic cm of the artificial physiological fluid was measured. The results are listed in Table 7.
You. As can be seen from Tables 4 and 6, a high pulp content nonwoven composite fabric of 110 gsm
The absorbent structure of the present invention containing
It has better test fluid dispersibility than a fluid dispersion layer made of ren. Tables 5 and 7
It can be seen that the absorption of the present invention comprising a nonwoven composite fabric with a high pulp content of 110 gsm.
The structure uses a surfactant-treated melt-blown polypropylene fluid dispersion layer.
It has the same or higher absorbency of the test fluid as the absorbent structure containing it. [0074] Experimental Example 17 A high pulp content nonwoven composite fabric was produced as follows. Northern softwood pulp fiber
("L" available from Kimberly-Clark Corporation.
onglac 19 ") and about 30% by weight of secondary fibers (Georgia).
Of Ponderosa Fibers of America in Atlanta
Available from the branch office Ponderosa Pulp Products
(BJ-inked secondary fiber pulp) from a mixture containing about 70 weight percent
gsm web is formed by a wet method, and the web is
Conveyed over a 0.4 oz / square yard (osy) (14 gsm) web of bond filaments. Quaker 2008 release agent (Quaker C
chemical Company) from dry pulp fiber to pulp fiber.
Added at levels of 0, 1, 2, 3 percent by weight. Spunbond filament
The joints have a smooth anvillo with approximately 306 pin bond positions per square inch.
Use a pattern that forms a maximum bond area of about 16 percent when contacting
I went there. The laminate having a total weight of about 90 gsm obtained in this manner was
Using a manifold, the composite material was formed by entanglement with water pressure. Each mani
Hold a row of 0.007 inch holes with a density of 30 holes per inch.
A jet strip with rows was placed. 600 ps water pressure in the manifold
i (gauge). Pass each layer under the manifold at a speed of about 20 fpm
On a 100 mesh stainless steel forming wire. this
The composite fabric was tested for dynamic and abrasion resistance on the side with the lower pulp fiber content.
The static coefficient of friction was measured. The results are listed in Table 8. Although the present invention has been described with respect to certain preferred embodiments, it is encompassed by the present invention.
The subject matter is not limited to these particular embodiments. Conversely, the present invention provides
Includes all changes, modifications and equivalents included within the scope of the claims.
Things.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of one example of a process for producing a non-woven composite fabric having a high pulp content. FIG. 2 is a plan view showing an example of a bond pattern. FIG. 3 is a plan view showing an example of a bond pattern. FIG. 4 is a plan view showing an example of a bond pattern. FIG. 5 is a micrograph showing a cross-sectional fiber shape of an example of a nonwoven composite fabric having a high pulp content. FIG. 6 is a photomicrograph showing the cross-sectional fiber shape of an example of a non-woven composite fabric having a high pulp content after a post-treatment step. FIG. 7 is a perspective view showing an example of an absorbent structure including a non-woven composite fabric having a high pulp content. FIG. 8 is a plan view showing an example of an emboss pattern. FIG. 9 is a top view of a test apparatus for measuring a liquid absorption rate of an absorbing structure. FIG. 10 is a cross-sectional view of a test device for measuring a liquid absorption rate of an absorbing structure. DESCRIPTION OF SYMBOLS 10 Processing device 18 Layer of pulp fiber 20 Nonwoven support 36 Composite cloth 100 Absorbing structure 102 Top layer 104 Fluid dispersion layer 106 Absorbing layer 108 Bottom layer 110 Upper surface 114 Upper surface 116 Lower surface 118 Upper surface 120 Lower surface 122 Upper surface 124 bottom surface 200 block 202 base 204 flat surface 206 opening 208 funnel 210 passage

Claims (1)

Claims: 1. A non-woven composite fabric having a high pulp content hydraulically entangled, having a bond density greater than about 100 bonds per square inch and having a total bond area of from about 2 to about 2 bonds. A nonwoven continuous filament support of about 30 percent by weight or less, about 30 percent by weight or less; a high average fiber length pulp having an average fiber length greater than about 1.5 millimeters; and a low average fiber length pulp having an average fiber length of less than about 1.2 mm. And a fibrous portion comprising at least about 70 weight percent of a wood pulp that is a mixture of: a non-woven composite fabric. 2. The nonwoven composite fabric according to claim 1, comprising about 10 to 25 weight percent of a nonwoven continuous filament support and about 75 to 90 weight percent of a fibrous portion comprising pulp. 3. The nonwoven composite fabric according to claim 1, having a basis weight of about 20 to about 200 grams per square meter. 4. The nonwoven composite fabric according to claim 1, further comprising clay, starch, particulate matter and superabsorbent particles. 5. The nonwoven composite fabric according to claim 1, further comprising up to about 3 percent of a release agent. 6. A wiping cloth comprising one or more layers of the nonwoven composite cloth according to claim 1 and weighing about 20 to about 200 gsm. 7. The nonwoven composite fabric according to claim 6, having a basis weight of about 40 to about 150 gsm. 8. A fluid dispersion of an absorbent nursing product comprising one or more layers of the nonwoven composite fabric of claim 1 and weighing from about 20 to about 300 gsm. 9. The nonwoven composite fabric according to claim 8, wherein the basis weight is about 30 to about 170 gsm. 10. The nonwoven composite fabric according to claim 1, wherein said continuous filament nonwoven support is a nonwoven web of continuous spunbonded filaments. 11. The nonwoven composite fabric according to claim 1, wherein the fiber portion is selected from virgin hardwood pulp fiber, virgin softwood pulp fiber, secondary fiber, and a mixture thereof. 12. The method of claim 11, wherein the fiber portion is a mixture of pulp having a short average fiber length of 50% by weight or more and pulp having a long average fiber length of about 50% by weight or less. Non-woven composite cloth. 13. A method for producing a high pulp content nonwoven composite fabric comprising at least about 30 weight percent nonwoven continuous filament support and at least about 70 weight percent wood pulp fiber portion, comprising: High average fiber length pulp fiber larger than about 1.5 mm and average fiber length 1.2
A layer of wood pulp fibers having a mixture of low average fiber length pulp fibers less than 1 mm is bonded to a nonwoven continuous filament support having a bond density of about 100 pin bond positions / in 2 and a total bond area of about 2 to about 30 percent. A method for producing a nonwoven composite fabric, comprising: forming a composite material by superimposing the layers on each other and entanglement the respective layers by hydraulic pressure; and drying the composite material. 14. The method according to claim 13, wherein the layers are superposed by depositing pulp fibers on a nonwoven continuous filament support by a dry forming method or a wet forming method. 15. The method according to claim 13, wherein the superposition of the layers is performed by mixing an agglomerated sheet of pulp fibers with a layer of a nonwoven continuous filament support. 16. The manufacturing method according to claim 13, wherein the pulp fiber coagulated sheet is selected from a repulpable paper sheet, a repulpable tissue sheet, and a wood pulp fiber bat. Method.