JPH08170263A - Nonwoven fabric and its production - Google Patents

Abstract

PURPOSE: To provide a nonwoven fabric composed of a nonwoven fabric of a specific hydrophobic filament and a specific short fiber web containing a hydrophilic fiber, satisfying air-permeability, water-resistance and wearing comfortableness at the same time and suitable for medical use. CONSTITUTION: A filament nonwoven fabric having a number of hot-pressed recesses each having an area of 0.3-0.6mm<2> and a short fiber web containing 40-70wt.% of a hydrophilic fiber (preferably regenerated fiber, etc.) are interlocked and integrated to a surface of a cloth of a hydrophobic filament such as polyolefin or polyester. The laminate is subjected to a fluid-jet treatment from the side of the short fiber web under a water-pressure of >=80kg/cm<2> and then to the fluid-jet treatment from the side of the nonwoven filament fabric to obtain a nonwoven fabric having an areal density of the nonwoven layer of 60-80g/m<2> and a thickness of 0.3-0.6mm. This nonwoven fabric gives a nonwoven fabric material for medical use having a water- content of >=5%, an air-permeability of 100-180cm<3> /cm<2> /sec, a water-resistant pressure of >=12cm, a surface abrasion strength of >=14, a tensile strength of >=9.0kg/5cm width in longitudinal direction, a tearing strength of >=0.8kg in longitudinal direction and a tensile strength of >=2.5kg/5cm width in lateral direction and exhibiting excellent abrasion resistance and sanitariness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven fabric having appropriate breathability and water pressure resistance and being comfortable to wear, and a method for producing the same. More specifically, the present invention relates to a disposable gown used in an operating room or the like. The present invention relates to a nonwoven fabric body suitable for medical use such as a shoe cover, a cap, an arm cover, a covering cloth, a drape, and a trunk for an inspection room, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a base cloth for disposable gowns, shoe covers, covering cloths, drapes, etc., there has been proposed a water punched nonwoven cloth using wood pulp and polyester short fibers (Japanese Patent Laid-Open No. 59-9465).
9).

This non-woven fabric is also called a spun-lace non-woven fabric. Specifically, polyester short fiber groups are opened to form a uniform web, and then a tissue or pulp mat is layered on the web, and the web is formed by high-pressure water flow. And a pulp mat are entangled and integrated.

However, this spunlaced nonwoven fabric has a low air permeability when used as a base fabric for medical non-woven fabric products, and therefore is liable to come loose, and produces a large amount of fiber waste due to friction. It gave a feeling of like.

As a method of reducing dust generation during use, surgical dressing excellent in lint-free property using a wet non-woven fabric in which columnar fluid entangled in a mixed state of cellulose-based short fibers and synthetic short fibers or in a laminated state is used. A manufacturing method thereof has been proposed (Japanese Patent Laid-Open No. 3-14693). Although this surgical gown has improved lint-free properties, it is made up of only short fibers, and because the water pressure during fluid entanglement treatment is low and the diameter of the orifice is slightly large, tensile strength and Tear strength and wear resistance are not fully satisfactory.

Further, as a method for improving the strength and drapability, a method has been proposed in which a fiber fleece in which continuous filament groups are self-bonded is used as a reinforcing material (Japanese Patent Laid-Open No. 1-97257). The non-woven fabric obtained by this method, when used as a base fabric for medical non-woven fabric products, etc., because each intersection of the continuous filament group is self-adhesive, has a dense and dense tissue, high air permeability, therefore In addition, there was a problem that external dust was likely to enter from the rough portion and the texture (comfort) was not sufficient.

In addition, is it a short fiber web and a thermoplastic polymer?
It is a non-woven fabric composed of long fiber webs made of
The area per piece of the long fiber web is 0.1
mm ²The following minute recesses were formed on one surface by thermocompression bonding.
One has been proposed (Japanese Patent Laid-Open No. 57-112454).
However, this nonwoven fabric has the following problems.
Was. That is, this nonwoven fabric has an area of 0.1
mm²There are many small recesses as shown below.
It has a high temperament and dust easily enters from the outside.
There was a problem that the wear was not sufficient.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the drawbacks of conventional non-woven fabrics, satisfies the requirements of breathability, water pressure resistance and comfort at the same time, and is suitable for medical use. The challenge is to provide.

[0009]

In order to solve the above-mentioned problems, the present invention takes the following means. That is,
The present invention is made of hydrophobic fiber and has an area of 0.3 by thermocompression bonding.
A flexible non-woven fabric layer in which a long-fiber non-woven fabric having a large number of recesses of up to 0.6 mm ² / co on at least one surface thereof and a short-fiber web containing hydrophilic fibers are laminated and integrated by interlacing, and the moisture content is 5%. Above, air permeability 100 cm ³ / cm ²
/ Sec to 180 cm ³ / cm ² / sec, water pressure resistance 12 cm or more, plane wear 14 times or more, tensile strength in the warp direction 9.0 Kg
A nonwoven fabric having a width of / 5 cm or more, a tear strength of 0.8 Kg or more in the warp direction, and a tensile strength of 2.5 Kg / 5 cm width or more in the weft direction.

Further, according to the present invention, a long fiber non-woven fabric made of hydrophobic fibers and having a large number of recesses by thermocompression bonding and a short fiber web containing hydrophilic fibers are laminated, and then 80 kg / cm ² or more from the short fiber web side is laminated. A method for manufacturing a non-woven fabric body, which is characterized in that a fluid jetting process is performed with water pressure.

The present invention will be described in detail below. First,
The nonwoven fabric body of the present invention comprises a long fiber nonwoven fabric and a short fiber web, and this long fiber nonwoven fabric has a large number of recesses having an area of 0.3 to 0.6 mm ² / co due to thermocompression bonding on at least one surface thereof. Must have. The recesses are important requirements for increasing the tensile strength and tear strength of the long-fiber nonwoven fabric, contributing to the improvement of dimensional stability, and keeping the air permeability within an appropriate range, and in turn, have a great influence on comfort. is there.

If the area of the concave portion per one piece is less than 0.3 mm ² / piece, the air permeability becomes too large and dust easily enters from the outside, which is not preferable for medical use. On the other hand,
On the other hand, if it exceeds 0.6 mm ² / ko, the air permeability will be too small, and it will be liable to be worn and will not be comfortable to wear, which is not preferable for medical use.

Since the number of the recesses (co / cm ² ) also affects the air permeability, it is preferably 20 co / cm ^2.
It is preferably in the range of up to 35 co / cm ² . 20 / c
m ² less than a is a not preferred is the strength and the like planes wear low the nonwoven material, 35 co / cm ² to more than the air permeability of the nonwoven fabric body is significantly reduced, unfavorably become even more hard texture.

The long-fiber nonwoven fabric may have the recesses on at least one surface, but it is preferable to have the recesses on one surface from the viewpoints of lowering rigidity and improving texture (comfort).

The long-fiber nonwoven fabric must be a hydrophobic fiber. Official moisture content of 1% among the hydrophobic fibers
The following fibers, for example, polyolefin long fibers, polyester long fibers, polyvinyl chloride long fibers, polyvinylidene chloride long fibers, polyurethane long fibers and the like can be used. If it is not a hydrophobic fiber, a sufficient water-repellent effect cannot be obtained when the substrate is made to have water repellency, which is not preferable. Among these, polyester long fibers having high strength, good workability, and excellent disposability are preferable. As the polyester-based long fibers, long fibers of polyethylene terephthalate, long fibers of polybutylene terephthalate, long fibers of polyethylene naphthalate, and the like can be used. The thickness of the long fibers is preferably 2d or less, more preferably 0.5 to
1.5d is good.

The long-fiber non-woven fabric has a unit weight of 1
0-20g / m²Are preferred. Long-fiber non-woven eye
Attached 10g / m²If less than, the thickness of long-fiber non-woven fabric
Is too thin to handle when laminated with short fiber webs
However, there is concern about the strength of the base fabric of medical non-woven products,
Not good. On the contrary, the basis weight of long-fiber non-woven fabric is 20 g / m
²If it exceeds the range, the long-fiber non-woven fabric has a high rigidity and the texture of the base fabric is high.
It becomes harder to use as a base fabric for medical non-woven products.
Not good for The thickness of the long fiber non-woven fabric is 0.10 to 0.
The range of 20 mm is also defined as the basis weight of the long-fiber non-woven fabric.
The reason is almost the same. The thickness of long-fiber non-woven fabric is 0.10.
If it is less than mm, the thickness of the long-fiber non-woven fabric is too thin and short fibers
Non-woven for medical use, difficult to handle when laminated with fiber web
It is not preferable because there is concern about the strength of the base fabric of the product. Long fiber
Fiber non-woven fabric with fibrous non-woven fabric thickness exceeding 0.20 mm
Made of non-woven fabric for medical use due to its high rigidity and hard texture of base fabric
Not suitable for use as a base fabric for articles.

Next, the short fiber web which is entangled with the long fiber non-woven fabric contains hydrophilic fibers to enhance the texture (comfort) of the non-woven fabric and to improve the air permeability, the water pressure resistance and the mechanical properties. It plays a role of keeping (controlling) at a specific level. The short fiber web preferably has hydrophilic fibers of 40 to
Must contain 70% by weight. This is determined from the viewpoints of both comfort and dimensional stability, and if the hydrophilic fiber content is less than 40% by weight, it will be uncomfortable when it comes into contact with the skin, which is not preferable. If it exceeds 70% by weight,
This is not preferable because it causes a problem in strength in medical applications, and further, when moisture is absorbed, dimensional stability is lowered and the shape is easily deformed.

The term "hydrophilic fiber" as used herein means a fiber having an official moisture content of 5% or more, and examples thereof include regenerated fiber and natural fiber. Among them, cellulosic fiber as hydrophilic regenerated fiber system such as rayon, polynosic, Cupra and the like are preferable.

The short fibers such as the hydrophilic fibers have a thickness of 0.7 to 1.5 d and an average fiber length of 32 to 51 mm.
Are preferred. If the fineness is less than 0.7d, there is a problem that the fiber openability of the short fibers deteriorates and a uniform short fiber web cannot be obtained. On the contrary, when the fineness of the short fibers exceeds 1.5d, the short fiber web has high rigidity and the texture becomes hard,
Further, there is a problem that sufficient water pressure resistance cannot be obtained when used as a base fabric of a medical non-woven fabric product. If the average fiber length of the short fibers is less than 32 mm, there is a problem that the fiber length is too short and sufficient entanglement between the short fibers cannot be obtained, resulting in a large number of dropped fibers. On the other hand, when the fiber length of the short fibers exceeds 51 mm, the texture of the short fiber web is deteriorated, and further, when it is used as a base fabric of a nonwoven fabric for medical use, there is a problem that sufficient water pressure resistance cannot be obtained.

The short fiber web contains, in addition to hydrophilic fibers, hydrophobic fibers having the above-mentioned thickness and length, preferably hydrophobic fibers having an official moisture regain of 1% or less, preferably in the so-called mixed spinning mode. ing.

The non-woven fabric layer in which the long-fiber non-woven fabric and the short-fiber non-woven fabric are laminated and integrated by interlacing is made flexible because a fluid jet treatment with water is used for the lamination and integration without using an adhesive. Has become. The non-woven fabric layer has a water content of 5% or more.

The basis weight of the laminated and integrated non-woven fabric layer is 60 to
80 g / m ² is preferred. If the basis weight of the laminated and integrated nonwoven fabrics is less than 60 g / m ² , there is a problem that sufficient water pressure resistance cannot be obtained when the nonwoven fabrics for medical use are used as a base fabric. On the contrary, when the basis weight of the laminated and integrated non-woven fabric exceeds 80 g / m ² , there is a problem that when it is used as a base fabric of a non-woven fabric product for medical use, the rigidity is high, the texture becomes hard and the flexibility deteriorates.

The thickness of the laminated and integrated nonwoven fabric is 0.3 to
It is 0.6 mm. If the thickness is less than 0.3 mm, there is a problem that sufficient water pressure resistance and good texture cannot be obtained when used as a base fabric for a medical non-woven fabric product. On the other hand, if the thickness exceeds 0.6 mm, when it is bulky and is used as a base fabric for medical non-woven products, it will be swelled and swelled when worn, and it will also take up extra space during storage and disposal. However, there is a problem that the amount of garbage increases at the time of disposal.

The non-woven fabric of the present invention comprises a flexible non-woven fabric layer in which a long-fiber non-woven fabric and a short-fiber web are laminated and integrated by entanglement, and must further have the following physical properties. First, the nonwoven fabric must have a moisture content of 5% or more. This is to prevent texture and unevenness when used as a medical non-woven product.
If the moisture content of the nonwoven fabric is less than 5%, the texture (touch) is poor when used as a medical nonwoven fabric product,
It is not preferable because it tends to get loose.

Next, the nonwoven fabric has an air permeability of 100 cm ^3.
/ Cm ² s to 180 cm ³ / cm ² / s. This is because it is comfortable to wear and does not get loose, and when it is less than 100 cm ³ / cm ² / sec, it is not preferable because it tends to get loose when used as a medical nonwoven fabric product, and when it exceeds 180 cm ³ / cm ² / sec. When it is used as a medical non-woven fabric product, bacteria and dust from the outside easily enter, which is not preferable.

Further, the non-woven fabric must have a water pressure resistance of 12 cm or more. This is to maintain resistance to liquids such as blood and body fluid when used as a medical non-woven product, and when it is less than 12 cm, when used as a medical non-woven product, to liquids such as blood and body fluid. It is not preferable because the resistance becomes low and there is a problem in safety.

Further, the non-woven fabric must have a flat wear of 14 times or more. This is to ensure the shape-retaining property with respect to the contact between products that are produced when they are used as medical non-woven products, and when it is less than 14 times, they are long-lived when they are used as medical non-woven products. In the case of time surgery, there are problems such as fluffing on the surface and thinning of the cloth due to the above-mentioned pine or contact, which is not preferable.

Furthermore, the nonwoven fabric body must have a tensile strength in the warp direction of 9.0 kg or more per 5 cm width. This is to prevent the product from being deformed or broken when it is used as a medical non-woven product. On the other hand, when it is less than 9.0 kg, the product is instantly applied with a large tensile force in the longitudinal direction. This is not preferable because it may cause problems such as deformation.

Furthermore, the tensile strength in the weft direction is 5c.
Must have a minimum of 2.5 kg per m width.
This is for the same reason as the case of the longitudinal direction,
On the other hand, if it is less than 2.5 kg, there is a possibility that a product may be deformed when a large pulling force is instantaneously applied in the weft direction, which is not preferable.

Furthermore, the tear strength in the longitudinal direction is 0.8K.
must be greater than or equal to g. This is to prevent damage due to contact of sharp medical instruments and instruments when used as a nonwoven fabric for medical use and to prevent tearing during wear.
If it is less than 8 kg, it may be damaged by tearing stress caused by the movement during wearing, and a sharp medical instrument,
This is not preferable because the risk of breakage due to the contact of the device occurs.

Here, the method for producing the nonwoven fabric of the present invention will be described. First, a long fiber non-woven fabric made of hydrophobic fibers is manufactured by a spunbond method, a melt blow method, etc.,
Then, thermocompression bonding is applied to at least one surface of the long fiber nonwoven fabric by embossing or the like to form a large number of recesses.

On the other hand, a short fiber web made of short fibers containing hydrophilic fibers is formed with a card or the like. Then, the long-fiber non-woven fabric and the short-fiber web are overlapped, and a high-pressure water stream of preferably 80 kg / cm ² or more is jetted from the short-fiber web side,
The short fibers are entangled with each other and the short fibers of the short fiber web are infiltrated into the long fiber nonwoven fabric to be entangled. In addition, the high pressure water flow is preferably 80 kg from the long fiber non-woven fabric side.
It is preferable to inject at a rate of / cm ² or more. In the liquid jetting apparatus, it is preferable that jetting holes having a hole diameter of 0.08 to 0.15 mm and nozzle intervals of 0.4 to 0.8 mm and nozzles of 1 to 3 rows arranged in multiple stages.

[0033]

【Example】

Example 1 A polyethylene terephthalate resin having an intrinsic viscosity of 0.63 was melt-extruded, spun, cooled, and then a long fiber fleece having an official moisture content of 0.4% and a fineness of 1.0 d was manufactured by an ordinary spunbond manufacturing method.

This long-fiber fleece was passed between an embossing roll having irregularities at a rate of 10 pieces / cm ² and a smooth roll, and thermocompression bonded under the conditions of 240 ° C. and 60 kg / cm,
A long-fiber nonwoven fabric having a basis weight of 15 g / m ² and a thickness of 0.11 mm (thickness other than the concave portions) was produced. The long-fiber nonwoven fabrics were manufactured by changing the area of the recess of the embossing roll.

On the other hand, official moisture regain of 11%, fineness of 1.25
d, 65% by weight of rayon having an average fiber length of 38 mm, 35% by weight of official moisture regain of 0.4%, fineness of 1.0 d, and polyester short fiber having an average fiber length of 38 mm were mixed and opened to give a basis weight of 65 g / m ^2. A short fiber web of

Then, the long-fiber nonwoven fabric and the short-fiber web are laminated on a metal support, and from the short-fiber web side, the nozzle diameter is 0.12 mm, the nozzle interval is 0.6 mm, and the water pressure is 100 mm.
A nonwoven fabric was produced by treating with a high-pressure water stream at Kg / cm ² . The characteristics are shown in Table 1.

[0037]

[Table 1]

The methods for measuring the characteristics shown in Table 1 were as follows. I. Area of recesses (mm ² / piece) 5 recesses of long-fiber non-woven fabric are randomly sampled and observed with an optical microscope. At the same time, a 30 times photograph is taken with a standard scale, and measurements are taken from the print, and the average value of 5 locations is shown. It was

B. Moisture content (%) JIS L 1015 (Chemical fiber staple test method)
It measured according to the test method regarding the equilibrium moisture content of. That is, about 5 g is taken from a sample that has reached water equilibrium, its mass and absolute dry mass are weighed, the equilibrium water content (%) is calculated by the following formula, and it is represented by the average value of three test times. Equilibrium moisture content (%) = [(mass at the time of sampling (g) -absolute dry mass of sample (g)) / absolute dry mass of sample (g)] x 100

C. Unit weight (g / m ² ) It was measured according to the test method for mass (unit weight) of JIS L 1085 (nonwoven fabric interlining test method). In addition, 2
Three 0 cm × 20 cm test pieces were sampled, the mass in each water equilibrium state was measured, and the average value is shown per unit area.

D. Thickness (mm) The thickness was measured with a constant pressure thickness meter according to the synthetic fiber long fiber nonwoven fabric test method of the Japan Chemical Fiber Association. The measurement area of the sample was 1 cm ² , the initial load was 20 g / cm ² , the number of tests was 3, and the average value was shown.

E. Water pressure resistance (cm) Measured according to the test method in accordance with JIS L 1092 (textile waterproof test method). Specifically, the test was carried out by the hydrostatic pressure method of the method A (low water pressure method). That is,
Using a water resistance tester, four 15 cm x 15 cm test pieces were sampled, the water level was raised, and the water level (cm) when water came out from three places on the back side of the test piece was measured. Expressed as

F. Air permeability (cm ³ / cm ² / sec) It was measured according to the test method according to JIS L 1096 (Test method for general fabrics). Specifically, using the Frazier tester of Method A, the suction fan was adjusted to show a pressure of 1.27 cm of water column, and from the pressure indicated by the vertical barometer at that time and the type of air hole used, The air volume (air permeability) that passes through the test piece is calculated from the following formula using the table attached to the tester. Air permeability (cm ³ / cm ² / sec) = measured value × nozzle coefficient (50) / measurement time (30 sec)

G. Lost fiber (book) A unit movement that actually wears a gown sewn using a non-woven fabric sample and simulates the movement of the user (back and forth of the upper body, flexion and extension of the elbow, rubbing of the side, metal scissors) The contact with (rubbing with) was performed 100 times each, and the number of lint (lint) generated was counted.

H. Planar wear (times) Measured according to the A-1 method (universal type method) concerning the wear strength of JIS L1096. Specifically, five test pieces having a diameter of 12 cm were sampled, placed on a rubber film, and a polishing paper (cc # 600) was used to press a load of 0.454.
kgf, friction speed 125 ± 5 times / min, air pressure 0.281
The number of times when the test piece broke in multiple directions under the condition of kg / cm ² and the test piece broke was measured and expressed as an average value of 5 times.

Re. Bending resistance (mm) It was measured according to the test method for JIS L 1096 (general woven fabric method). Specifically, using a 45 ° cantilever type tester of Method A, 5 pieces of a 2 cm × 15 cm test piece were sampled in the vertical direction and the horizontal direction, and one end was 45 °.
The test piece was placed on a smooth horizontal table having a slope, and then the test piece was gently slid in the direction of the slope, and when the center point of one end of the test piece touched the slope, the length of movement of the test piece The average value of the length (mm) was expressed as the bending resistance.

Nu. Comfort (dots) Comfort when wearing a sewn gown with each non-woven fabric facing the short fiber web on the skin side is 10
When a name monitor was evaluated with a focus on drapability, and when it was judged that there was drapability, it was evaluated as 1 point.

Le. Mixing of dust from the outside Using colored dust in accordance with JIS D 0207, it was judged whether or not the dust entered the nonwoven fabric body and passed therethrough.

Wo. Tensile strength (kgf / 5 cm) Measured in accordance with the tensile strength test method of JIS L-1096. That is, the strength at break was measured using a constant-speed extension type tester under the test conditions of a test piece width of 5 cm, a gripping interval of 20 cm, and a pulling speed of 20 cm / min. The number of tests was three, and the tensile strength was represented by its average value.

Wa. Tear strength (kgf) Of the test methods for tear strength of JIS L-1096, the D method (Pendulum method) was applied correspondingly. That is, 5 pieces of a 6.5 cm × 10 cm test piece were sampled in each of the warp direction and the weft direction, and a 2 cm cut was made at a right angle in the center of both grips of the test piece using an Elmendorf tear tester, and the remaining 4 The load strength when tearing at 0.5 cm in the warp and weft directions was measured and expressed as an average value.

From Table 1, the following was confirmed. NO1 is
This is the case where the area of the recesses is 0.2 mm ² / piece, which is outside the scope of the present invention. The air permeability is as high as 200 cm ³ / cm ² / sec, and dust from the outside is mixed in. Also, since the unit surface area of the recess is small, the binding force and entanglement force between the fibers on the surface are low, so the flat wear is low. Therefore, the surface may be chipped when used for a long time, and the tear strength is low because the unit surface area of the concave portion that serves as the reinforcing portion is low and it is difficult to prevent the tear strength once it is torn.

NO2 to NO5 were within the range of the present invention, and the air permeability was appropriate, the number of fallen fibers was small, and the wearing comfort was good.

Since NO6 has a large area of recesses of 1.0 mm ² / piece, the air permeability is small and it is uneven and uncomfortable to wear.

Example 2 Among the short fibers constituting the short fiber web of Example 1, the same fineness as that of Example 1 was adopted except that the fineness of polyester short fibers was variously changed. Area is 0.5 mm ² / piece, the ratio of existing on one surface is 30 pieces / cm
^The same conditions as in Example 1 were adopted except that the number was changed to ^2.
A nonwoven fabric was manufactured in the same manner as in 1. and the characteristics are shown in Table 2.

[0055]

[Table 2]

The characteristics shown in Table 2 were measured by the methods described above. From Table 2, the following was confirmed. The thickness (d) of the short fiber of NO1 is 0.
Because it is as thin as 5d, the air permeability is low and it is uncomfortable to wear,
Since the resistance due to contact with the skin caused by the ultrafine fibers was large, the flat wear was small and the wear resistance was poor.

NO2 to NO5 had appropriate air permeability and water pressure resistance, and were comfortable to wear.

Since NO6 has a large short fiber thickness of 2.0d, it has a large air permeability and dust from the outside is conspicuous.
It was not preferable because of low water pressure resistance and hard texture.

Example 3 1.5d, 3 as the constituent fibers of the short fiber web of Example 1
Using 8% 100% rayon, the basis weight is 55 g / m ^2.
The non-woven fabric of the present invention was produced in the same manner as in NO 3 of Example 1 except that

For comparison, in Example 3, a pair of smooth rollers were used in place of the embossing rollers, the temperature of one heating roller was set to 210 ° C., and a self-bonded long fiber nonwoven fabric was prepared. A nonwoven fabric was manufactured under the same conditions as in Example 3 by laminating the fibers (Comparative Example 1).

For comparison, polyester short fibers (1.2 d, 38 mm) were used to obtain a uniform web (weight per unit area 3).
0 g / m ² ) was formed, and five commercially available tissues (40 g / m ^{2 in} basis weight) made of wood pulp fibers were layered on this web and integrated under the same conditions as in Example 3 to achieve a basis weight of 66 g / m ^2.
m ² (polyester staple fiber: wood pulp = 45:55)
The non-woven fabric of was produced (Comparative Example 2).

The characteristics of Example 3 and Comparative Examples 1 and 2 thus obtained were measured by the above-mentioned measuring method and shown in Table 3.

[0063]

[Table 3]

From Table 3, the following was confirmed. That is, it was found that Example 3 uses a self-adhesive long-fiber nonwoven fabric, has a lower bending resistance, is superior in flexibility, and is comfortable to wear as compared with Comparative Example 1. Further, it was found that in Comparative Example 2 in which polyester short fibers and wood pulp fibers were used, the number of shed fibers was small, the lint-free property was excellent, and the air permeability was high, so that the fibers did not get loose and were comfortable to wear.

[0065]

The non-woven fabric of the present invention is one in which a long-fiber non-woven fabric and a short-fiber non-woven fabric are laminated and integrated, and the long-fiber non-woven fabric is recessed to a predetermined size by thermocompression bonding with an embossing roll made of a hydrophobic material. Are formed in large numbers. As a result, the concave portions are regularly and uniformly formed to be strong, which contributes to the reinforcing effect, the reduction of the dropped fibers, and the planar wear when the nonwoven fabric body is formed. The non-thermocompression-bonded portion of the long fiber nonwoven fabric is entangled with the short fibers in the short fiber web by a high-pressure water flow under a water pressure condition of 80 kg / cm ² or more. by this,
The material in the long fiber non-woven fabric and the material in the short fiber web having the official moisture regain are tightly laminated and integrated. At the same time, the short fibers in the short fiber web are also intimately entangled with each other by the high-pressure water flow. As a result, air permeability, fallen fibers, water pressure resistance, and comfort can be achieved at the same time.

[0066]

EFFECT OF THE INVENTION The nonwoven fabric of the present invention comprises a specific long-fiber nonwoven fabric and a specific short-fiber web, and has suitable air permeability and water pressure resistance as a base fabric for medical non-woven products, and is comfortable to wear. It is also excellent in abrasion resistance, has less dust from the outside, has less falling fibers, and has excellent wear resistance. In addition, the method of the present invention has an effect that the above-mentioned non-woven fabric can be stably manufactured with good reproducibility.

Claims (6)

[Claims] 1. A long fiber non-woven fabric having a large number of recesses of hydrophobic fibers having an area of 0.3 to 0.6 mm ² / co, which is formed by thermocompression bonding, on at least one surface thereof, and a short fiber web containing hydrophilic fibers are entangled. It consists of a flexible non-woven fabric layer that is laminated and integrated, and has a moisture content of 5% or more and an air permeability of 100 cm ³ /
cm ² / sec ~180cm ³ / cm ² / sec, the water pressure 12c
m or more, surface wear 14 times or more, tensile strength in the longitudinal direction 9.0
A nonwoven fabric having a Kg / 5 cm width or more, a tear strength of 0.8 kg or more in the warp direction, and a tensile strength of 2.5 Kg / 5 cm width or more in the weft direction. 2. The fabric weight of the non-woven fabric layer is 60 to 80 g / m ² ,
The nonwoven fabric body according to claim 1, which has a thickness of 0.3 to 0.6 mm. 3. A hydrophilic fiber is added to a short fiber web in an amount of 40 to 70.
The non-woven fabric body according to any one of claims 1 to 2, which is contained in a weight percentage. 4. The short fibers of the short fiber web have a fineness of 0.7 to 1.5 d and an average fiber length of 32.
The non-woven fabric according to any one of claims 1 to 3, which is in the range of ~ 51 mm. 5. A long-fiber non-woven fabric made of hydrophobic fibers having a large number of recesses by thermocompression bonding and a short-fiber web containing hydrophilic fibers are laminated, and then 80 Kg / c from the short-fiber web side.
A method for producing a non-woven fabric, which comprises subjecting a fluid jet process to a water pressure of m ² or more. 6. The method for producing a nonwoven fabric body according to claim 5, wherein after the fluid ejection treatment from the short fiber web side, the fluid ejection treatment is further performed from the long fiber nonwoven fabric side.