JP3474209B2 - Hydro-entangled nonwoven fabric with good formation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
Non-woven fabrics with excellent properties, texture, air permeability and strength
A method for producing the same. [0002] 2. Description of the Related Art In recent years, nonwoven fabrics have been replaced by woven fabrics in many fields.
Has been widely used. Low cost and high productivity
Therefore, the use as a substitute for the conventional woven fabric, or
Because it can provide performance that cannot be obtained with cloth,
Use as a woven fabric is conceivable. In addition, conventional paper pallets
High performance by utilizing the functionality of non-woven fabric in the field of
The supply of active materials has become popular. [0003] Among them, using a high-pressure columnar water stream to reduce the fiber
Iwayu that has a woven fabric-like texture
Of spunlace nonwoven fabric or hydroentangled nonwoven fabric
It is thriving and many products have been launched on the market. water
Fluid entanglement (span lace) is one of the web processing methods
Therefore, it is necessary to supply the web before processing.
is there. Web manufacturing method is dry method of card method and air lay method
Method, melt blow method, spun bond method, wet papermaking method, etc.
can give. The card method uses long fibers.
But it is difficult to make a uniform web.
The processed non-woven fabric also has poor formation and can be observed with transmitted light
Then, spots are seen, and there are problems with the feel and texture.
leave. The air lay method also uses long fibers
And the formation becomes worse, and the obtained non-woven fabric is
Leave a problem on the point. [0005] Using the web obtained by the spunbond method,
Despite high strength, poor formation and continuous fiber connection
With few free ends of fiber
Requires a lot of energy and interacts with other web
Compounding by confounding is difficult. Melt blow method
Although it is possible to make fine fibers into webs,
There is a problem that production speed is slow and expensive. [0006] In the wet papermaking method, the production rate is lower than the above method.
Faster, multiple fibers of different sizes and types in the same device
Can be mixed in any ratio. That is, in the form of fiber
, Staple, pulp, etc.
The diameter of the fibers that can be used is from ultra-fine fibers to thick fibers.
It can be used up to fibers and has very good formation compared to other methods.
This is how the web is obtained. Because of this, the pole
It is considered to be a web forming method with a wide range of applications. One disclosed in Japanese Patent Application Laid-Open No. 2-6651
In the method, the fiber diameter is 7 to 25 μm, the fiber diameter (D) and the fiber length
The value of the ratio (L / D, aspect ratio) of (L) is 800 to 2
000 short fiber webs are three-dimensionally crossed by high pressure columnar water flow
An entangled wet nonwoven fabric is disclosed. [0008] This nonwoven fabric is a shortcoming of the conventional wet nonwoven fabric.
The disadvantage is that the strength is weak due to the short fiber length.
It is noted as an improvement. In other words,
Hydro-entangled nonwovens using wet webs in the range of spec ratios
Has many free-cut ends of the fiber and can move freely during confounding.
There are many fibers that can be
It states that the strength has been developed because of the entanglement. However, in the prior art of this specification,
In order to disperse fibers evenly in water, the fiber length is generally
Approximately 3 to 7 mm is required, and the fiber length exceeds 7 mm.
Non-woven fabrics processed from a formula web are said to have poor formation.
In addition, as shown in Comparative Example 2,
Entanglement of the nonwoven fabric reduces the drapability of the nonwoven fabric after entanglement.
It is said that this is the cause of insufficient strength. [0010] Similarly, an example using a wet papermaking web and
Japanese Patent Application Laid-Open No. 3-14695 discloses a preferable fiber length.
Is 15 mm or less.
As you can see, the fiber length became longer and confounding became more difficult
Rather, the fiber is entangled and the formation is also reduced, but the strength
Probable cause of the decline. From this, the aspect ratio becomes large.
Therefore, due to the factor that the fiber movement during confounding is suppressed,
The formation became worse and the movement of the fibers was suppressed,
It can be considered that performance such as drapability and strength has decreased.
Wear. On the other hand, a web by a dry method, especially a card method
When using, the preferred fiber length is 20 to 100 mm
ing. In the case of the card method, an appropriate free-cut end
Have a long fiber length (which can be used effectively for confounding)
Can be used. Therefore, in addition to the strength due to confounding,
In addition, the fiber length is longer than that of the wet method, and the
It is considered that the range is wide and the strength is developed. [Problems to be solved by the invention] [0013] The present invention relates to a wet papermaking method and a dry method.
Utilizing the advantages of the sheet forming method,
Is good, manufactures a web with a long fiber length,
Degree, drape, good texture, good ventilation,
It is intended to provide a uniform nonwoven fabric. [0014] Means for Solving the Problems The present inventors have made the above-mentioned problems.
We studied diligently. As a result, the wet
Fabrics with a fineness of 0.3 denier (hereinafter abbreviated as d) or more
Containing fibers, these fibers are three-dimensionally entangled and
Having a pore size allows for good formation, drapability and hand
That a nonwoven fabric with excellent breathability and strength can be obtained.
I found it. In addition, a specific aspect
By carefully fabricating fibers with a
By producing a good web with good
It has been found that woven fabrics can be manufactured. That is, in the present invention, the wet papermaking web is simply
Layered or laminated, tertiary fibers in web and between layers
Not entangled and do not substantially separate within a single layer or between layers.
Good water exchange for woven fabrics that satisfies the following conditions
It is a entangled nonwoven fabric. Fiber length (L) and fiber diameter with fineness of 0.3 denier or more
(D) ratio (L / D, aspect ratio) is greater than 2000
It is made of fiber. The value of the maximum gap diameter to the average gap diameter is within 5 times
You. Further, in the above nonwoven fabric, the fiber length is 50 mm or less.
Is a hydroentangled nonwoven fabric. When the fineness is 0.3 denier or more,
Disperse fibers with water ratios greater than 2000 in water,
Adjust the slurry that does not entangle these fibers and use wet papermaking.
The obtained web is made into a single layer or multiple sheets.
Layer, and laminated with other non-woven fabric, placed on a support,
A high-pressure columnar water stream from above
Good entanglement of water, characterized by entanglement and drying
This is a method for producing a nonwoven fabric. Hereinafter, the present invention will be described in detail. Also,
The hydro-entangled non-woven fabric with good formation is referred to as non-woven
Abbreviated as cloth. The fibers used in the nonwoven fabric of the present invention are fibers
The degree is 0.3d or more. More preferably, 0.3 to 5
d. If it is thinner than 0.3d, the nonwoven fabric becomes denser,
It is not preferable because the air permeability deteriorates. If more than 5d, fiber
The diameter is large, and the surface properties of the nonwoven fabric deteriorate, which is not preferable.
As will be described later, the fibers are within the range of the aspect ratio of the present invention.
Weincho becomes very large and paper cannot be made
Therefore, it is not preferable. [0018] The aspect ratio of the fiber used is from 2000
Larger is preferred. If less than 2000, between fibers
Is difficult to confound, and the amount of fibers flowing out during confounding increases. Ma
The fiber length is preferably 50 mm or less. Fiber longer than 50mm
It is difficult to make paper using fibers. Furthermore, fineness is 0.
When using 3d or more fibers,
The upper limit of the aspect ratio that can be formed is 5000 or less. The strength of the nonwoven fabric by the hydroentanglement method is
It is considered to be determined by the balance between the condition and the fiber length. I
However, a good fiber length for entanglement in the case of the dry method is 20 to 10
Considering that the fiber length is
If the fiber length is longer, the aspect ratio
The larger the value, the greater the strength of the nonwoven fabric. Large fiber length
And the strength of the web
Decrease. Further description will be made in detail. In general,
The shorter the fiber length, the more free ends of the fibers and the entanglement between the fibers
However, the fibers that can be entangled are
Limited to fibers in the immediate vicinity of the fiber. Conversely, the fiber length is long
Will result in fewer free ends, but due to the long fiber length,
Wide range of fibers that can be entangled. Thus, the degree of confounding
Depends on the fiber length and the free end. However, dry c
In the web, the fiber length of 20mm or more is effective.
Fiber length rather than strength difference due to the number of free ends
It seems that the difference in intensity is larger. [0021] In addition, the fiber easily moves at the time of confounding.
Is easier to confound, and the intensity of expression is greater
Becomes The ease of movement of the fiber depends on the aspect ratio of the fiber
Not only the web fiber arrangement,
Expected to be affected. That is, if the aspect ratio is 2
Even if it exceeds 000,
The better non-woven fabric
It is. Conversely, poorly formed webs have reduced fiber movement
Therefore, strength is not developed for the fiber length.
You. For the above reasons, the aspect ratio of 2000
In the following cases, the fiber length is short,
Although it is possible to obtain a non-woven fabric with a certain level of strength,
It can not be said. With more fibers than 2000
It is believed that an excellent nonwoven fabric is obtained. In addition, when the aspect ratio exceeds 5000,
If the fiber length exceeds 50 mm,
At the operative level, wet papermaking is difficult and web formation is poor
The free movement of the fiber is suppressed, and the confounding can be performed firmly.
Absent. Because there is a weak part of such confounding,
Not only decreases the uniformity of the nonwoven fabric, but also
The texture and the drape
And the like are inferior. However, if the aspect ratio is 5
Even if the fibers are more than 000, they can be easily and uniformly dispersed.
If so, it is possible to obtain a better nonwoven fabric. The fibers used in the present invention include polyester
Fiber, polyolefin fiber, polyacrylonitrile
Fiber, polyvinyl alcohol fiber, nylon fiber
Organic synthetic fibers such as fibers and urethane fibers, and recycled fibers,
Fibers such as semi-synthetic fibers and natural fibers. [0025] Polyester fiber refers to polyester fiber.
Phthalate, polybutylene terephthalate,
Homopolymers and copolymers such as modified polymers of limmer
Fiber. [0026] Polyolefin fibers are polypropylene fibers.
Polyethylene, polystyrene, their modified polymers
-Fibers consisting of homopolymers and copolymers such as-
Polyacrylonitrile fiber refers to acrylic fiber,
Polyvinyl alcohol fibers such as krill fibers
Nylon fiber such as fiber made of nyl alcohol
Fibers made of polymers such as Iron 6, Nylon 66, etc.
U. Semi-synthetic fibers are fibers such as acetate fibers,
Recycled fibers are regenerated cellulose fibers such as rayon and cola.
Solution of gen, alginic acid, chitin, etc.
It means a thread. Natural fiber is a material such as hemp or cotton.
Refers to protein-based fibers such as lulose-based fibers, wool, and silk. The fibers used in the present invention are made of synthetic fibers.
If the composite fiber consists of two or more of the above polymers,
It may take a form. The cross-sectional shape of the fiber is a circle
Shape, oval, triangle, Y, T, U, star,
It has a so-called irregular cross-sectional shape such as a dog bone type.
You may. Fiber having a fineness of 0.3d or more used in the present invention
Is that fibers with relatively low rigidity tend to move and bend
Quick and easy to confound. Of small aspect ratio fiber
If the fiber is relatively rigid, the fiber moves,
It is difficult to bend the fiber,
They tend to drop and are not suitable for confounding. However, the aspect ratio exceeds 2000
In this case, even fibers with high rigidity can be bent,
Confounding is possible if confounding is performed at a higher water pressure. Also,
Binder that elutes or loses contact during the entanglement process
-Entanglement is better when using a web with fibers fixed with components.
It is possible to perform with high water pressure. Of course, other than the above fibers, the present invention
It is possible to include a small amount of non-woven fibers in the nonwoven fabric
However, it is within a range that hinders the performance of the nonwoven fabric of the present invention.
must not. Next, the pore size of the nonwoven fabric of the present invention will be described.
Do. The pore size is determined by the bubble point method described in ASTM F-316.
And mean flow point method
It is measured as the pore size. Comparing average pore size with maximum pore size
Thus, the uniformity of the nonwoven fabric can be evaluated. Degree of confounding
Depending on the case, these void diameters change. For example, strong confounding
When performed firmly, these pore sizes become smaller, and conversely
The weaker the confound, the larger the void diameter. That is, formation,
If there is unevenness of confounding due to deviation of basis weight,
The cloth range is widened. The average of the pore diameters
Judging that the confounding was effective just because it showed
It is not possible. Therefore, the difference between the average gap diameter and the maximum gap diameter is
The smaller the is, the more uniform the nonwoven fabric, in other words
It can be thought that it is done at once. The maximum gap diameter is within 5 times the average gap diameter.
In this range, the fibers were entangled uniformly.
Is confirmed. Maximum void diameter exceeds 5 times the average void diameter
, The non-woven fabric lacks uniformity, poor formation, and uneven confounding
The strength of the nonwoven is decoy, the drape of the nonwoven,
The feel is inferior. In this way, the most
Large, measuring the average pore diameter to determine the entangled state,
Not only uniformity, but also the touch and
Can be evaluated. Next, the method for producing the nonwoven fabric of the present invention will be described.
I do. The fibers used in the present invention have a large aspect ratio.
Take special care to prevent fiber tangling during the defibration and dispersion processes
Need to pay. As mentioned earlier, wet papermaking
Non-woven fabric is reduced in formation due to entanglement of fibers in the web
Greatly affects the performance of Before disintegrating the fiber, a dispersant
To disperse uniformly in a solution of about 1% dispersant
Pre-soaking the fiber promotes fiber disaggregation
And is effective in preventing entanglement after disaggregation.
It is fruitful. Rotating material can be used for disaggregation and dispersion.
Noh. At this time, it is necessary to pay attention to the wings of the rotating object.
You. The wings are where the fibers are entangled and are easy to cling
With more meat than when dispersing fibers with a small aspect ratio
Thick types are preferred. Furthermore, for the fiber length, 1 /
Those having a thickness of 3 or more and being rounded are preferable. As for the stirring, the fibers are not entangled.
However, it is preferable that stirring for disaggregation be performed promptly.
If fiber disaggregation is insufficient with short stirring, instantaneous
Intermittently increase the stirring speed to impact the undisintegrated fiber bundle,
A method that promotes disaggregation is preferred. The stirring speed should be one
If the stirring time is long only by speeding up occasionally,
A bond is formed, which is not preferable. Not disaggregated at once
In some cases, slow down the stirring speed and then stir again for a short time.
The method of repeating the step of speeding up is preferred. Further
In order to give intermittent share to undisintegrated fiber,
It is also effective to perform processing for a short period of time. Next, when the disintegrated fibers are dispersed,
Maintain fiber dispersion and prevent loose
Perform under gentle stirring. Make sure to disintegrate the slurry
If necessary, add more water to lower the concentration, then
Add the crab to maintain the dispersion. During this time, the stirring was
Perform as slowly as possible. In this way, uniform
Prepare a slurry dispersed in
Means that fiber entanglement and flocculation during flocculation are substantial
Refers to a state not seen in The slurry thus prepared is subjected to a wet papermaking method.
To form a web. this
The web may be three-dimensionally entangled with a continuous stream of high pressure water.
Also, a binder is applied to the web, and after papermaking, dried,
After winding once, three-dimensional confounding may be performed. by
The place of the undercoat is slurry if it is fibrous.
Medium or liquid, applied after papermaking and before drying
The method is preferred. Web drying method is Yankee Dry
Dryer, multi-cylinder cylinder dryer, air dryer
And can be dried by an ordinary drying method. Here, the binder used is a liquid or a fiber.
There is a fiber shape. Mainly as a fibrous material
Utilizing entanglement with fiber, heat, etc.
There is one that uses wearability. For liquids, they dissolve during the confounding process.
Are preferred. Therefore, water-soluble ones are preferred.
No. In addition, these water-soluble binders are made into fibrous
A method of papermaking with body fiber is also a preferable method. liquid
The amount of the binder in the form is 1 to 10 with respect to the sheet weight.
% By weight is preferred. If less than 1% by weight, the sheet strength
Is weak, and if it is more than 10% by weight, the adhesion between fibers is too strong.
A new three-dimensional intermingling that cannot be performed
It is not possible to perform entanglement firmly. After lamination, delamination
Separation occurs. The fibrous binder is mainly used during the confounding process.
The bond with the body fiber is released, and a new three-dimensional confound appears.
Are preferred. Therefore, the amount of the binder to be applied depends on the adhesiveness.
In the case of the sheet, 3 to 20% by weight based on the sheet weight is preferable.
Good. If it is less than 3% by weight, strength after papermaking is obtained.
Absent. If it exceeds 20% by weight, the movement of the fiber is suppressed,
The confounding cannot be performed firmly. Also, after lamination,
Peeling occurs. In the case of utilizing the entanglement with the fiber,
The structure has a branched structure, and the branched portion is the main part of the present invention.
When determining the fineness and aspect ratio of body fibers, there is no limit on the amount.
However, if it is out of this range, 3-20% by weight
Is preferable. A place where sheets using a binder are entangled
In this process, the formation is not disturbed and the formation is good
A non-woven fabric can be obtained. Probably as soon as the bond comes off
It is presumed that confounding occurs. The web or web obtained in this way is
The three-dimensional confounding is performed with a high-pressure columnar water flow using a sheet. Confounding
The method is a single layer or multiple layers of web or sheet
And place it on a support of about 50-200 mesh,
, A three-dimensional entanglement of the fibers is performed. In the following, the confounding is firmly and properly performed according to the purpose.
The conditions for performing are described. Nozzle for jetting water flow
Preferably has a diameter of 10 to 500 μm. Between nozzles
The distance is preferably from 10 to 1500 μm. These nozzles are orthogonal to the papermaking direction.
The direction needs a range that covers the width of the sheet to be processed,
For the papermaking direction, web type, basis weight, processing speed,
Consider the water pressure and set the nozzle head within the range where sufficient confounding can be obtained.
The number of codes can be changed and used. Also, the number of confounds
You can choose arbitrarily. Water pressure is 10-250 kg / cm^TwoUsed in the range
Preferably. More preferably, 50 to 250 kg /
cm^TwoRange. 10kgf / cm^TwoLess than enough of fiber
No confounding is obtained. 250kg / cm^TwoBigger and web
The fibers are remarkably dropped from the sheet, and the sheet is damaged. Was
However, depending on the size of the grammage and the size of the fiber rigidity,
It is added that the upper limit of changes. The web transport speed is in the range of 5 to 200 m / min.
It is possible to use it in a box. If the transfer speed is slow,
The water flow hitting the web may damage the web,
In addition, this is not preferable in terms of production efficiency. If the transfer speed is too fast,
I can't give the web the energy it needs for confounding
Therefore, confounding cannot be performed firmly. The nozzles are arranged step by step, and the water pressure is initially processed
By gradually increasing the pressure from the end to the end, the web
To reduce confusion and to properly confound
it can. In addition, it is preferable in that the surface quality is improved. As well
The nozzle diameter or nozzle spacing, or both
Reducing the size allows proper confounding, and
It is preferable because the surface quality of the cloth is improved. Also, the nozzle header is rotated.
Vibrating left and right, or supporting the web
Vibrating the ears left and right further improves surface quality
Can be Furthermore, after confounding, between the nozzle and the web
Insert a wire mesh of 40 to 100 mesh into the
Surface quality can also be improved by spraying on liquefied web
it can. The confounding method is to use only one side or both sides.
It can be carried out. After confounding, further lamination
It is also possible to perform confounding. The thus obtained three-dimensional confounding process is performed.
Excess moisture during or after entanglement
Was removed by suction or wet pressing
After, there is an air dryer, air through dryer
Or dry using a suction drum dryer, etc.
be able to. Contains the fibrous binder described above.
Non-woven fabric is used to improve the strength of the binder component.
Drying at a temperature above the melting point is also possible. Also confounding
Applying heat and pressure to the web after
Has the same effect. However, a softer nonwoven
If necessary, dry below the melting point of the binder
It is necessary to let Of course, other non-woven fabrics such as dry non-woven fabrics
Woven fabric, pulp sheet, fibers deviating from the claims of the present invention
Wet wet nonwoven fabric etc. on one side, both sides, sandwich
Although it is possible to cause
Needless to say, it must not be an enclosure. The ground of the present invention obtained by the method as described above
Spunlace non-woven fabric with good fit
Post-processing such as immersion processing and water-repellent processing can be performed.
New performance can be provided. The use of the nonwoven fabric of the present invention is
For raw materials. Rich in drape, soft and skin
Good feel, changing fiber diameter, confounding water pressure, support
Can control the pore size. In addition, the pulp layer is laminated
Can provide barrier properties, masks, surgical
It is suitable for applications such as clothing gowns. Also, because of good air permeability, it is suitable for liquid
It is suitable for use as a prefilter for the body. In addition, good texture and good texture
Suitable for use as a base material for synthetic leather, and has high elasticity
It is also possible to impregnate the molecules. Also at the time of 3D confounding
And a web made of so-called extra-fine fibers with fineness
By layering and confounding, high-quality suede-like artificial leather
It is suitable for use as a substrate. As described above, the nonwoven fabric of the present invention
An example of the use of is shown, but the application is limited to these.
Note that it is not. [0061] The nonwoven fabric of the present invention provides a wet web having a good formation.
Used and have a certain large aspect ratio,
It has a specific gap diameter. Because the formation is good
The entanglement is uniform and the fiber length is long.
It has strong nonwoven fabric strength. In addition, formation is uniform
From, good feel, excellent texture, breathability, strength,
It is a good non-woven fabric that could not be obtained with a conventional non-woven fabric. [0062] EXAMPLES The present invention will be specifically described below with reference to examples.
However, the present invention is not limited to this embodiment.
All parts and percentages described in the examples are by weight.
is there. As shown in the examples, the tensile strength was 20 mm in width,
150mm length sample, span 100mm, speed 200cm
When the sample is pulled at
Maximum load value, vertical direction (web transport direction), horizontal direction
The direction (perpendicular to the transport) was measured. JI is JI
Use the 45-degree cantilever method described in S-L1096
The average value in the vertical and horizontal directions was measured. As the air permeability, JIS-B9908 format
The pressure loss measured at a wind speed of 5.3 cm / sec by
Was. The pore size of the nonwoven fabric is described in ASTM-F-316.
Bubble point method and mean flow point method
The maximum void diameter (MAX) and the average void diameter (MFP) were determined. The formation of the nonwoven fabric was held over the transmitted light.
◎ is very good, ○ is good, △ is slightly bad
It was evaluated in four stages of bad and bad. Non-woven fabric texture
And after rubbing it a little, it gets caught in your hand and it feels strange
Judged by degree. ◎ is very good, ○ good, △ slightly bad
It was evaluated in four stages of bad and bad. Embodiment 1 Polyethylene terephthale with a fineness of 1.5d and a fiber length of 29mm
PET fiber (fiber diameter 12 μm, L / D = 2.4
× 10^Three) 97 parts in 1% nonionic dispersant solution
did. Then, hot water soluble polyvinyl alcohol (PV
A) Fiber (VPW107-1, manufactured by Kuraray Co., Ltd., dissolved in hot water)
(The temperature for re-dissolving in water is 20 ° C.) 3 parts in a pulper
Sprinkle and use reciprocating reversing stirrer (Agitator, Shimazaki Seisakusho)
Moved to equipped chest. DispersionAgentPET fiber impregnated in
After adding water, stir at high speed for a short time to
Was disintegrated. Then put this slurry in a chest
And add more water, stirring gently with an agitator.
And a 0.1% polyacrylamide solution (viscosity)
Was. Thus, a uniform slurry was prepared. The
Using a rally, a round paper machine with a width of 50 cm and a basis weight of 41 g / m^Two
Web at 110 ° C using a Yankee dryer
Drying was performed. Two sheets were laminated, and the nozzle head was
The confounding was performed with a columnar water flow using a head. Nose of the first head
The nozzle has a nozzle diameter of 120 μm, a nozzle interval of 0.6 mm, and two rows.
Water pressure 60kgf / cm^TwoThe second head has a nozzle diameter of 120 μm,
Nozzle spacing 0.3mm, water pressure 90kgf / cm in one row^Two, 3rd
The nozzle has a nozzle diameter of 100 μm, a nozzle interval of 0.3 mm, and one row
With water pressure of 120kgf / cm^TwoThe fourth head has a nozzle diameter of 100
μm, nozzle interval 0.3mm, water pressure in one row 100kgf / c
m^TwoThe fifth head has a nozzle diameter of 100 μm and a nozzle interval
0.3mm, water pressure 60kgf / cm^TwoIt is. Strengthen laminated sheet
On a 100-mesh support made of synthetic polyester
And passing the laminated sheet under the above water flow to solidify the fiber
Was confounded. Flip the sheet after confounding, and do the same on the back
Was performed. The confounding speed was 15 m / min. This
Using a suction through dryer for the entangled web
Drying was performed at 10 ° C. to obtain a nonwoven fabric. The results are shown in Table 1.
You. Embodiment 2 PET fiber with a fineness of 1.5 d and a fiber length of 38 mm (fiber diameter 12
μm, L / D = 3.2 × 10^Three), As in Example 1.
A non-woven fabric was produced by the method described above. Table 1 shows the results. Embodiment 3 PET fiber with a fineness of 0.4 d and a fiber length of 20 mm (fiber diameter 6.
5 μm, L / D = 3.1 × 10^Three) And the same as in Example 1.
A nonwoven fabric was produced in the same manner. Table 1 shows the results. Embodiment 4 PET fiber with a fineness of 0.4 d and a fiber length of 30 mm (fiber diameter 6.
5 μm, L / D = 4.6 × 10^Three) 50 parts, same fineness
PET fiber with a length of 15 mm (L / D = 2.3 × 10^Three) 5
A method similar to that of Example 1 using a fiber mixed with 0 parts
Thus, a nonwoven fabric was manufactured. Table 1 shows the results. Embodiment 5 PET fiber with a fineness of 4d and a fiber length of 45 mm (fiber diameter 20μ)
m, L / D = 2.5 × 10^Three) And the same as in Example 1.
A nonwoven fabric was produced by the method. Table 1 shows the results. Embodiment 6 With the same composition as in Example 1, the disaggregation dispersion was
The test was performed using a Bellmer-type chest equipped with wings. Fiber
Confirm that the disintegration is sufficient, and then reduce the stirring speed.
Then, a tackifier was added to maintain a uniform dispersion state. Example 1
A nonwoven fabric was obtained in the same manner as described above. Table 1 shows the results. Strange
A good nonwoven fabric was obtained even by the above dispersion method. Comparative Example 1 PET fiber with a fineness of 1.5 d and a fiber length of 38 mm (fiber diameter 12
μm, L / D = 2.4 × 10^Three), The web using the card
After forming the web, implement the web manufactured using the cross wrapper
Entangling was performed under the same conditions as in Example 1 to produce a nonwoven fabric. result
Are shown in Table 1. It is possible to obtain non-woven fabric with low aspect ratio
It is possible, but compared with the one using the wet web of the same fiber length.
When you look at it, you can see that the formation is bad and the feel is rough in some places
Was. These are thought to be due to uneven basis weight. Ma
In addition, there is a large difference in strength between specimens, which is considered to be confounding unevenness.
It was a terrible thing. Comparative Example 2 PET fiber with a fineness of 1.5 d and a fiber length of 10 mm (fiber diameter 12
μm, L / D = 0.8 × 10^Three), As in Example 1.
A non-woven fabric was produced by the method described above. Table 1 shows the results. In the table
As shown, L / D is small and fibers are short.
Therefore, non-woven fabrics with insufficient confounding and high strength can be obtained.
could not. In addition, the free ends of the fibers appear on the surface of the nonwoven fabric.
There was a tingling feeling that was probably caused by
Was. Comparative Example 3 PET fiber with fineness 0.1d and fiber length 5mm (fiber diameter 3μ
m, L / D = 1.7 × 10^Three) And the same as in Example 1.
By the method, a nonwoven fabric was produced. Table 1 shows the results. fiber
Because the diameter is small, the pressure loss is large and the L / D is small,
A high strength nonwoven fabric could not be obtained. Comparative Example 4 Example 1 Agitating for disaggregation without using dispersant with the same formulation
Was done. The glue was added to this and dispersed with agitator
However, the fibers were entangled in the slurry,
Entangled into a large mass. Using this slurry,
Under the same conditions as in Example 1, papermaking and entanglement were performed. The resulttable1
Shown in Even if the same fiber is used, the strength,
It became inferior in all aspects of rigidity, formation and texture. Fiber
Poor formation due to fiber entanglement may be the cause. Comparative Example 5 PET fiber with a fineness of 2d and a fiber length of 76 mm (fiber diameter 14μ
m, L / D = 5.4 × 10^Three) And the same as in Example 1.
The paper was made by the method and entangled. Table 1 shows the results. Formation
Tried to obtain a good web of
Emitted. The web entangled using this web is
Of course, the strength, drape, and feel are very poor
there were. [0079] [Table 1] Embodiment 7 90 parts of PET fiber of Example 1 and core-sheath type P of PVA fiber
ET heat-fusible fiber (denier 2 denier, fiber length 5 mm, uni
Chica, Melty 4080, melting point of sheath 110 ° C) 1
0 part, and then a non-woven fabric was produced in the same manner as in Example 1.
Built. However, the basis weight of the sheet is 40 g / m^TwoAnd after confounding
The drying temperature was 95 ° C. Table 2 shows the results. Heat melting
As in Example 1, a good non-woven fabric was obtained using adhesive fibers.
Was. Embodiment 8 Using only the PET fiber of Example 1 and using a binder
80g / m^TwoPaper web, and implement it as it is
Entangling was performed under the same conditions as in Example 1 to produce a nonwoven fabric. result
Are shown in Table 2. Good non-woven even without binder
A cloth is obtained. Embodiment 9 A PET fiber having a fineness of 0.1 d and a fiber length of 5 mm is the same as in Example 1.
The sheet was formed by the same method. This sheet and the sheet obtained in Example 1 were used.
And entangled. At first, 0.1d of fiber
The confounding was performed from one side, and then the confounding was performed from the back. Confounding
The conditions are the same as in the first embodiment. Table of results2Shown in 0.
1d, 5mm PET fiber is not strong in single layer,
Good by laminating with large sheet with good breathability and strength
A good nonwoven fabric is obtained. Embodiment 10 Polyethylene, polypropylene with 3d fineness and 5mm fiber length
Dividable fiber consisting of (DF-2, manufactured by Daiwabo, 16 split
Possible, non-woven property after splitting fiber diameter 5-6μm)
After adding a dispersant, stirring with a pulper and dividing,
41g / m^TwoWas prepared. On this sheet,
The non-woven fabric obtained in Example 1 is laminated, and a stream of water flows first from the split fiber side.
And confounded. In the same confounding condition as in the first embodiment,
A woven fabric was manufactured. Table 2 shows the results. Use this nonwoven
Wipe the lens of the dirty eyeglasses on the side of the split fiber
Was. The lens surface is clean and no scratches are visible.
Also, no fibers were dropped off. [0084] [Table 2] Embodiment 11 Polypropylene fiber (fineness 0.5d, fiber length 20mm)
Diameter 8.8 μm, L / D = 2.3 × 10^Three)
A nonwoven fabric was produced in the same manner as in Example 1. Table 3 shows the results
Show. Embodiment 12 Acrylic fiber with a fineness of 0.5 d and a fiber length of 20 mm (fiber diameter 8
μm, L / D = 2.5 × 10^Three) And the same as in the example.
By the method, a nonwoven fabric was produced. Table 3 shows the results. Embodiment 13 Rayon fiber with a fineness of 1.5 d and a fiber length of 30 mm (fiber diameter 1
2 μm, L / D = 2.5 × 10^Three) 48 parts, the same fineness
Rayon fiber with a length of 10 mm (L / D = 0.83 × 1
0^Three) 48 parts, 3 parts of PVA fiber (VPW107-1)
In addition to water, polymer polyacrylamide (viscosity) 0.1
% Solution, and using a beater of the type
Disintegration and dispersion were performed. In addition, this slurry
Transfer to attached chest, further dilute with water, add glue
Well, the dispersion was kept. Paper making and drying as in Example 1
Then, two sheets obtained are laminated, entangled, and nonwoven fabric
I got Table 3 shows the results. Comparative Example 6 4 consisting of rayon fiber with a fineness of 1.5 d and a fiber length of 38 mm
0g / m^Two2 card webs are laminated and the same as in Example 1.
Confounding was performed under conditions. Table 3 shows the results. Card web
The web obtained in the above is poorly formed, resulting in strength, drainage
Inferiority and feel to the wet web
Was. [0089] [Table 3] [0090] According to the present invention, the specific fiber diameter and the
Of fibers with a three-dimensional ratio.
Entangled with a specific pore size,
The use of Weicho makes the formation good and drapes
Nonwoven fabric with excellent strength and touch and high strength can be obtained
You. Even if the aspect ratio and fiber length are within the scope of the present invention.
Even if the formation is not good, it should be out of the range of the pore size.
As a result, the draping property, tactile sensation and strength are inferior.

Claims (1)

(57) [Claim 1] In a nonwoven fabric in which a wet-laid paper web is single-layered or laminated, and fibers in the web and between layers are three-dimensionally entangled and do not substantially peel off within a single layer or between layers. A good hydroentangled nonwoven fabric that satisfies the following conditions. 1) A fiber having a fineness of 0.3 denier or more and a fiber length (L) to fiber diameter (D) ratio (L / D, aspect ratio) of more than 2,000. 2) The value of the maximum gap diameter to the average gap diameter is within 5 times.