KR20210030330A - Machine and method for preparing fibrous web, fibrillar fiber aggregate or nonwoven fabric, and fibrous web, fibrillar fiber aggregate or nonwoven fabric prepared thereby - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing a fibrous web, a fibrillar fiber aggregate, or a nonwoven fabric using a woven fabric, a method for manufacturing a fibrous web, a fibrillar fiber aggregate, or a nonwoven fabric using the apparatus, and a fibrous web, a fibrillar fiber aggregate, or a nonwoven fabric manufactured by the method, especially, a fibrous web, a fibrillar fiber aggregate, or a nonwoven fabric for use in a hemostatic agent or an anti-adhesive agent.

Description

An apparatus and method for producing a fibrous web, fibril-like fiber aggregate or nonwoven fabric, and a fibrous web, fibrillar fiber aggregate or nonwoven fabric produced thereby, and fibrous web, fibrillar fiber aggregate or nonwoven fabric prepared thereby}

The present invention is an apparatus for manufacturing a fibrous web, a fibrillar fiber aggregate or a nonwoven fabric using a woven fabric, and a fibrous web, fibril-like fibers using the apparatus It relates to a method of manufacturing an aggregate or nonwoven fabric, and a fibrous web, fibril-like fiber aggregate or nonwoven fabric produced by the method, in particular, a fibrous web, fibril-like fiber aggregate or nonwoven for use as a hemostatic or anti-adhesion agent.

Non-woven fabric refers to a fiber product made by forming a web in the shape of a sheet (cloth) by tangling various fibers according to mutual characteristics without going through processes such as twisting, weaving, knitting, etc., and bonding them by mechanical and physical methods.

The nonwoven fabric manufacturing process is generally made up of three steps: web formation → web bonding → processing. The web forming process is a process of making a web by distributing and laminating fibers to a uniform thickness as possible on a conveyor. The web bonding process is a process of tangling or bonding fiber aggregates to have morphological stability by giving appropriate strength to the web so that the fibers are not separated. The processing process is the process of completing the nonwoven fabric through dyeing or processing required for the final use.

Nonwoven fabrics are divided into wet method and dry method according to the web formation method. Dry and wet processes are divided into whether the web is formed in a dry or wet state. That is, in the dry method, fibers are formed in the form of a web in air, and in the wet method, the fibers are dispersed in a liquid to obtain a web. Therefore, the method of forming a web is classified according to the matrix that disperses the fibers, that is, air and liquid. On the other hand, nonwoven fabrics are also divided into long fiber nonwoven fabrics and short fiber nonwoven fabrics depending on the type of fiber.

Oxidized Regenerated Cellulose (ORC) is a known absorbable hemostatic substance. Many methods are known for forming various types of hemostatic agents based on Oxidized Cellulose (OC) into powders, fabrics, nonwovens, knitted fabrics, other forms and combinations thereof. Hemostatic wound dressings currently used include knitted or nonwoven fabrics containing oxidized regenerated cellulose (ORC).

Korean Patent Publication No. 2013-0101109 discloses a) providing a cellulose yarn having a minimum twist of filaments; b) forming a multi-yarn, single feed circular knitted cellulose fabric with minimal twist; c) scouring the cellulose cloth; d) oxidizing the scoured cloth; e) pliabilizing the oxidized fabric; f) de-knitting the softened fabric to form a continuous strand having a crimp of about 2.0 crimps/cm (5 crimps/inch) to about 4.7 crimps/cm (12 crimps/inch). ; g) cutting the continuous strand to form staples that are about 1½ to about 4¼ inches (about 3.8 to about 10.8 cm) in length; h) carding the staples into a carded batt; i) A method of manufacturing a reabsorbable hemostatic nonwoven dressing comprising the step of forming a single layer of nonwoven felt by needle-punching the carded bat and entangled in three dimensions.

However, since the above method includes the step of softening the oxidized fabric, releasing knitting, and cutting to form staple fibers of a specific length, the manufacturing process is long and complicated.

In addition, in general, machines used to manufacture fiber webs and non-woven fabrics often use bundles of fibers that have already been gripped with short fibers as raw materials. Methods of manufacturing fibrous webs, nonwovens, and the like have not been known so far.

In particular, physical properties of the formed fibrous web and non-woven fabric are sensitively changed according to the characteristics of a manufacturing machine such as a fibrous web and a non-woven fabric. The physical properties of each component, such as the order of bonding, the presence or absence of the bedding fabric in each component of the machine, the shape, length, angle, and arrangement of the fabric, as well as the physical properties of each component, such as the operating speed of each component, are generated by the physical properties of the fiber web and nonwoven fabric. The characteristics are determined, and the development of mechanical equipment with the optimal combination of machine configurations and operating conditions for manufacturing excellent fiber webs and nonwovens, and development of hemostatic agents or fiber webs and nonwovens with excellent anti-adhesion effect manufactured using the above facilities It is a necessary situation.

It is an object of the present invention to provide an apparatus capable of producing a fibrous web, a fibril-like fiber aggregate, or a non-woven fabric from a woven fabric in a simple process.

Another object of the present invention is to provide a method of manufacturing a fibrous web, fibril-like fiber aggregate or nonwoven fabric using the above apparatus.

Another object of the present invention is to provide a fibrous web, a fibril-like fiber aggregate, or a nonwoven fabric that is manufactured by the above method and can be used as a hemostatic agent or an anti-adhesion agent.

According to an aspect of the present invention, there is provided an apparatus for producing a fibrous web, fibril-like fiber aggregate or non-woven fabric from a woven fabric, comprising: a feed roller; A cylinder in which a flat bar is provided on the surface; Doffer; And a stripper; wherein a tooth is formed on the surface of each of the feed roller, flat bar, cylinder, doffer, and stripper, and the woven fabric passes through the feed roller and is supplied to the cylinder. , After passing between the flat bar and the cylinder, there is provided an apparatus, which is operated to sequentially pass through the doper and stripper.

According to another aspect of the present invention, there is provided a method of manufacturing a fibrous web, comprising the step of passing a woven fabric through the apparatus of the present invention and processing it into a fibrous web.

According to another aspect of the present invention, the step of processing the woven fabric into a fibrous web by passing it through the apparatus of the present invention; And calendering a plurality of the fibrous web; containing, a method for producing a fibril-like fiber aggregate is provided.

According to another aspect of the present invention, the step of processing the woven fabric into a fibrous web by passing it through the apparatus of the present invention; Combining a plurality of the fibrous webs in a non-woven manner; And calendering the combined plurality of fibrous webs; containing, a method of manufacturing a nonwoven fabric is provided.

According to another aspect of the present invention, there is provided a fibrous web manufactured by the method for manufacturing a fibrous web of the present invention and having a weight per unit area of 10g/m ² to 60g/m ² .

According to another aspect of the present invention, a fibril-like fiber assembly is provided that is manufactured by the method for manufacturing a fibril-like fiber assembly of the present invention, and has a weight per unit area of 100 g/m ² to 600 g/m ² .

According to another aspect of the present invention, a nonwoven fabric manufactured by the method of manufacturing the nonwoven fabric of the present invention and having a weight per unit area of 50g/m ² to 600g/m ² is provided.

According to another aspect of the present invention, there is provided a hemostatic agent or anti-adhesion agent comprising the fibrous web of the present invention.

According to another aspect of the present invention, there is provided a hemostatic agent or an anti-adhesion agent comprising the fibril-like fiber aggregate of the present invention.

According to another aspect of the present invention, there is provided a hemostatic agent or an anti-adhesion agent comprising the nonwoven fabric of the present invention.

According to the present invention, a fibrous web, fibril-like fiber aggregate or non-woven fabric can be produced from a woven fabric in a simple process, and the fibrous web, fibril-like fiber aggregate or non-woven fabric thus produced is particularly suitable as a hemostatic agent or anti-adhesion Can be used.

1 is a diagram schematically showing a specific example of an apparatus for manufacturing a fibrous web, fibril-like fiber aggregate or nonwoven fabric of the present invention (tooth formed on the surface of a feed roller, a flat bar, a cylinder, a doffer, and a stripper is not Shown).

Hereinafter, the present invention will be described in detail.

In the present invention, the term "fabric" is a concept including a knit.

In a preferred embodiment, the tensile strength of the fabric may be, for example, 4kgf to 20kgf (more specifically 5kgf to 18kgf, even more specifically 6kgf to 15kgf). If the tensile strength of the fabric is lower than the above level, it may not be properly cut and may take on a powdery shape, and if it is higher than that, the cutting may not occur completely, resulting in a part that is not aligned with the product.

In one embodiment, the weight per unit area of the fabric usable in the present invention is, for example, 30 g/m ² to 150 g/m ² (more specifically 40 g/m ² to 120 g/m ² , more specifically 50 g /m ² to 100g/m ² ). If the weight per unit area of the fabric is higher than the above level, the amount of fiber in the device may be too large and processing into the fiber web may not be smooth.If it is lower than that, the amount of fiber in the device may be too small and the resulting fiber web may be torn or weakened. , Production can be reduced.

In one embodiment, the fabric may be Oxidized Regenerated Cellulose (ORC), Oxidized Cellulose (OC), or a combination thereof.

In the present invention, oxidized (regenerated) cellulose means oxidized (regenerated) cellulose having a carboxy group (-COOH). In one embodiment, the content of carboxyl groups (ie, degree of oxidation) in the oxidized (regenerated) cellulose may be 13% to 24% by weight.

According to one embodiment of the present invention, oxidized (regenerated) cellulose having an oxidation degree of 13% to 17% by weight may be used in order to enhance the anti-adhesion effect of the prepared fibrous web, fibril-like fiber aggregate or nonwoven fabric.

According to another embodiment of the present invention, in order to enhance the hemostatic effect of the prepared fibrous web, fibril-like fiber aggregate or nonwoven fabric, the oxidation degree is greater than 17% by weight to 24% by weight (for example, 18% by weight to 24% by weight). %) phosphorylated (regenerated) cellulose can be used.

The oxidized (regenerated) cellulose can be prepared according to a method known in the art, and for example, it can be prepared according to the method disclosed in U.S. Patent No. 7,279,177, U.S. Patent No. 7,645,874, etc. It is not.

The apparatus for producing a fibrous web, fibril-like fiber aggregate or non-woven fabric of the present invention performs an operation of carding a woven fabric.

In the present specification, the term "carding" or "carding process" is combing (also referred to as "brushing") while cutting fibers forming a woven fabric to form a fibrous web. It has a meaning that encompasses the process of doing.

The apparatus of the present invention for performing such a carding operation includes: a feed roller; A cylinder in which a flat bar is provided on the surface; Doffer; And a stripper (stripper); Including, the feed roller, flat bar, cylinder, doffer, and each surface of the stripper has a tooth formed, and the woven fabric is supplied to the cylinder through the feed roller , After passing between the flat bar and the cylinder, it is operated to sequentially pass through the doper and stripper.

The feed roller serves to supply the woven fabric to the cylinder. In one embodiment, the device of the present invention may include one or more (eg, 1 to 3) such feed rollers.

The fabric supplied to the cylinder through the feed roller is cut and combed while passing between the flat bar provided on the cylinder and the cylinder surface. Specifically, the fabric is inserted between the cylinder covered with the metallic wire on which the bedding is formed and the bedding of the flat bar provided on the cylinder, and is cut and held between two types of bedding of different characteristics, and at the same time, it is changed into a form of a short fiber. It is combed.

In one embodiment, the device of the present invention may include one or more (eg, 1 to 2) cylinders equipped with such flat bars. In addition, in one embodiment, in the apparatus of the present invention, one or more flat bars (eg, 2 to 10, or 3 to 8) may be provided per cylinder.

The doffer serves to remove the gripped fabric distributed on the cylinder surface and finally comb it to form a fibrous web. In one embodiment, the device of the present invention may include one or more (eg, 1 to 2) such dopers.

The stripper serves to move the fiber web formed through the doper from one roller to another. In one embodiment, the device of the present invention may include one or more (eg, 1 to 3) such strippers.

In one embodiment, in addition to the above components, the device of the invention further comprises one or more additional components, such as a take-in roller and/or an additional roller for movement of the resulting fibrous web. Can include.

In the apparatus of the present invention, teeth are formed on the surfaces of each of the feed rollers, flat bars, cylinders, dopers and strippers.

The chimcloth enters into the woven fabric to unwrap the fabric, and serves to mix the fibers forming the woven fabric, and the height, angle, thickness, number, etc. are for each facility within the range that can achieve the object of the invention. Can be appropriately selected.

In one embodiment, the bedding formed on the surface of the feed roller, a height of 2.0 to 6.0 mm (more specifically, 3.0 to 5.0 mm, or 3.2 to 5.0 mm), an angle of 50 to 85 ° (more specifically, 55 to 80 ° , 60 to 85° or 65 to 80°), thickness 0.5 to 2.5 mm (more specifically 1.0 to 2.0 mm, or 1.0 to 1.8 mm), number of 3 to 20 / inch (more specifically 4 to 18 /inch, or 5 to 15 pieces/inch) may be satisfied, and it is preferable to satisfy all of them.

In one embodiment, the bedding fabric formed on the cylinder surface is 2.0-6.0mm in height (more specifically 3.0-5.0mm, or 2.0-4.0mm), angle 50-85° (more specifically 55-80°, 60 to 85°, or 65 to 80°), thickness of 0.5 to 2.5 mm (more specifically, 0.5 to 1.5 mm, or 0.5 to 1.2 mm), number of 3 to 20 / inch (more specifically, 4 to 18 /inch, or 6-12 pieces/inch) may be satisfied, and it is preferable to satisfy all of them.

In one embodiment, the bedding fabric formed on the surface of the flat bar is 0.5 to 5.0 mm in height (more specifically 0.5 to 4.5 mm, or 0.5 to 4.0 mm), angle 50 to 90 ° (more specifically 60 to 90 ° , Or 70 to 90°), thickness 0.5 to 2.5 mm (more specifically 0.5 to 1.5 mm, or 0.8 to 1.2 mm), number of 3 to 20 / inch (more specifically 4 to 15 / inch, or It may be to satisfy one or more of the conditions of 4 to 10 pieces/inch), and it is preferable to satisfy all of them.

In one embodiment, the bedding fabric formed on the surface of the doper is 2.0 to 6.0 mm in height (more specifically 2.5 to 5.5 mm, or 3.0 to 5.0 mm), and an angle of 30 to 80° (more specifically 35 to 70°, Or 40 to 65°), 0.5 to 2.5 mm thick (more specifically 0.5 to 1.5 mm, or 0.6 to 1.2 mm), 3 to 20 pieces/inch (more specifically 5 to 18 pieces/inch, or 8 It may be to satisfy one or more of the conditions of ~14 / inch), it is preferable to satisfy all.

In one embodiment, the bedding fabric formed on the surface of the stripper is 2.0-6.0mm in height (more specifically 2.5-5.5mm, or 3.0-5.0mm), angle 30-80° (more specifically 35-70°, Or 35 to 55°), thickness of 0.5 to 2.5 mm (more specifically, 0.5 to 1.5 mm, or 0.8 to 1.5 mm), number of 3 to 20 pieces/inch (more specifically, 5 to 18 pieces/inch, or 8 It may be to satisfy one or more of the conditions of ~14 / inch), it is preferable to satisfy all.

In fabricating a fibrous web using the apparatus of the present invention, the interaction of the feeder roller speed, cylinder speed and doffer speed affects the physical properties of the fibrous web being produced.

The fabric is conveyed to the cylinder through the feeder roller, and the fabric that has passed through the cylinder and the flat bar is gripped and converted into short fibers, combed, and reaches the action area of the doffer. Since the speed of the doffer surface with respect to the cylinder surface is relatively low (usually less than 1/30), the fabric that has passed through the cylinder and the flat bar is all gripped and converted into short fibers to be combed, forming a fibrous web between the cylinder and the doffer. To be finally combed. The fabric that has not been gripped is returned to the cylinder, and the fabric in the doffer is combed and easily separated into a web. That is, a thin layer in the cylinder becomes a thick layer in the doffer, and it can be condensed to produce a thick fiber web.

For example, when the speed of the cylinder is high, the gripping and combing actions by the immersion of the cylinder and the flat bar are better, and carding occurs more effectively, while the doping action efficiency is low. In addition, as the speed of the doffer is increased or slowed, the fibrous layer collected in the doffer can be made thin or thick. This increases or decreases the time to receive the combing action of the cylinder for the fabric gripped by the doffer. If the doping speed is too high, the coaming time is short and the quality of the web is deteriorated. Conversely, if the doping speed is too slow, the doping efficiency is lowered.

In one embodiment, when manufacturing a fiber web using the apparatus of the present invention, the feed roller speed may be 0.1 to 1 mpm (meter per minute), more specifically 0.2 to 0.8 mpm, more specifically It may be 0.3 to 0.7 mpm.

In one embodiment, when manufacturing a fiber web using the apparatus of the present invention, the cylinder speed may be 100 to 350 rpm (revolution per minute), more specifically 150 to 300 rpm, and more specifically May be 170 ~ 230 rpm.

In one embodiment, in the manufacture of a fibrous web using the apparatus of the present invention, the doffer speed may be 2 to 4 mpm (meter per minute), more specifically 2.5 to 4 mpm, more specifically May be 2.8~3.8 mpm.

In one embodiment, in the manufacture of a fibrous web using the apparatus of the present invention, preferably two or more of the feeder roller speed, cylinder speed, and doffer speed may be within the above-described range, more preferably all of them. .

The method of manufacturing a fibrous web according to the present invention includes the step of passing the woven fabric through the apparatus of the present invention and processing it into a fibrous web. That is, in the method of manufacturing a fibrous web of the present invention, the woven fabric is cut and combed in the device to be processed (ie, carded) into the form of a fibrous web.

In one embodiment, the method of manufacturing a fibrous web of the present invention may further include layering the fibrous web that has undergone the processing step into a batt. In this layering step, a plurality of fibrous webs (e.g., 5 to 15, 5 to 14, 5 to 13, 5 to 12, or 5 to 11) are stacked in layers to form a fibrous web batt (batt ) Can be formed.

In one embodiment, the weight per unit area of the fibrous web produced according to the method of the present invention is preferably 10 g/m ² to 60 g/m ² , more preferably 15 g/m ² to 30 g/m ² . If the weight per unit area of the fiber web is lower than the above level, there may be a problem in that the binding on the web is weak and a certain shape cannot be maintained, whereas if it is higher than that, there may be a problem that the web may be separated when the web is stacked because it is too bulky .

The method of manufacturing a fibril-like fiber assembly according to the present invention includes a step of calendering a plurality of fiber webs manufactured as described above.

There is no particular limitation on the facilities and operating conditions of the calendering step, and an appropriate one may be selected from among well-known facilities and operating conditions within a range capable of achieving the object of the invention.

In one embodiment, the weight per unit area of the fibril-like fiber aggregate manufactured according to the method of the present invention is preferably 100 g/m ² to 600 g/m ² , more preferably 150 g/m ² to 300 g/ m ² . If the weight per unit area of the fibril-like fiber aggregate is lower than the above level, the hemostatic effect may not be sufficient, and if it is higher than that, the binding force decreases and the web may be separated during use.

The method of manufacturing a nonwoven fabric according to the present invention includes the steps of combining a plurality of fibrous webs manufactured as described above in a non-woven manner; And calendering the combined plurality of fibrous webs.

As a method of bonding the fiber web in a non-woven manner, methods known in the art, for example, needle punching method, thermal bonding method, melt blow method, spunlace method, stitch bond method, etc. may be used. It is not limited to these. In one embodiment, a plurality of fibrous webs are joined by needle punching, wherein, when a plurality of fibrous webs (or fibrous web bats) are fed to the needle punching process and passed through the needle punching machine, the barb- A bed of barbed needles penetrates it, and the barb-formed needle entangles the fibers in three dimensions and increases the structural density.

The plurality of fibrous webs thus joined in a non-woven manner are then subjected to a calendering step. There is no particular limitation on the facilities and operating conditions of the calendering step, and an appropriate one may be selected from among well-known facilities and operating conditions within a range capable of achieving the object of the invention.

In one embodiment, the weight per unit area of the nonwoven fabric manufactured according to the method of the present invention is preferably 50 g/m ² to 600 g/m ² , more preferably 80 g/m ² to 300 g/m ² . If the weight per unit area of the nonwoven fabric is lower than the above level, the hemostatic effect may not be sufficient, whereas if the weight per unit area of the nonwoven fabric is higher than that, the binding force decreases, and the web may be separated when used.

The fibrous web, fibril-like fiber aggregate and/or nonwoven fabric prepared according to the present invention may be suitably used as a hemostatic agent or an anti-adhesion agent, and in particular, may be suitably used as a hemostatic agent.

Accordingly, according to another aspect of the present invention, there is provided a hemostatic agent or an anti-adhesion agent comprising a fibrous web, fibril-like fiber aggregate or nonwoven fabric according to the present invention.

The present invention will be described in more detail through the following examples, but this is only for describing the present invention, and the scope of the present invention is not limited in any way by the examples.

[Example]

Example 1

The woven Regenerated Cellulose having a tensile strength of 10 kgf was oxidized using nitrogen dioxide (oxidation degree: 19%) and then dried. Thereafter, woven oxidized regenerated cellulose (ORC) was added to the apparatus of the present invention and processed to produce a sheet-shaped fibrous web. During processing, the feeder roller speed, cylinder speed, and doffer speed conditions were as shown in Table 1 below, and the immersion in the apparatus satisfied the specifications of Table 2 below. The weight per unit area of the fabricated one-ply fiber web was measured to be ^{about 15 g/m 2.} Subsequently, a fibril-like fiber aggregate was formed from the prepared fibrous web through a calendering process under the conditions shown in Table 3 below.

Example 2

The woven oxidized regenerated cellulose (ORC) obtained in Example 1 was put into the apparatus used in Example 1 and processed to produce a fibrous web in the form of a sheet. During processing, the feeder roller speed, cylinder speed, and doffer speed conditions are shown in Table 4 below. Then, the prepared plurality of fibrous webs were bonded through needle punching. Needle punching conditions were shown in Table 5 below. Subsequently, a nonwoven fabric was formed through a calendering process under the conditions shown in Table 3 above. The weight per unit area of the prepared nonwoven fabric was measured to be ^{about 85 g/m 2.}

Example 3

In order to evaluate the hemostatic effect of the fibril-like fiber aggregate prepared in Example 1, a model small animal test in which the kidneys of rats were excised was performed. As a result, the mean blood loss value lost until hemostasis is shown in Table 6 below. In Table 6, the case where a part of the kidney of a rat is excised and left for natural hemostasis is Control, and Sample 1 is a case in which hemostasis is performed by attaching a fibril-like fiber aggregate after resection.

As can be seen from the results of Table 6, the fibril-like fiber aggregate according to the present invention exhibits an excellent hemostatic effect.

Example 4

In order to evaluate the hemostatic effect of the nonwoven fabric prepared in Example 2, a model small animal test in which the kidneys of rats were excised was performed. As a result, the mean blood loss value lost until hemostasis is shown in Table 7 below. In Table 7, the case where part of the kidney of the rat was excised and left to hemostasis naturally was controlled, and Sample 2 was the case where hemostasis was performed by attaching a nonwoven fabric after resection.

As can be seen from the results of Table 7, the nonwoven fabric according to the present invention exhibits excellent hemostatic effect.

Comparative Example 1

The woven Regenerated Cellulose having a tensile strength of 4 kgf was oxidized using nitrogen dioxide (oxidation degree: 19%) and then dried. Thereafter, the woven oxidized regenerated cellulose (ORC) was put into the apparatus used in Example 1 and processed to produce a fibrous web in the form of a sheet. During processing, the feeder roller speed, cylinder speed, and doffer speed conditions are shown in Table 1 above. Subsequently, a fibril-like fiber aggregate was formed from the prepared fiber web through a calendering process under the conditions shown in Table 3 above.

In order to evaluate the hemostatic effect of the prepared fibril-like fiber aggregate, a model small animal test was performed in the same manner as in Example 3, and as a result, the mean blood loss value until hemostasis was shown in Table 8 below. As shown in.

From Table 6 and Table 8, the tensile strength of Example 1 manufactured with a fabric having a 10kgf The hemostatic effect of the fibril-like fiber assembly was obtained from Comparative Example 1 prepared with a fabric having a tensile strength of 4 kgf. It can be seen that it was remarkably superior to the fibril-like fiber aggregate.

Comparative Example 2

Using recycled cellulose having a tensile strength of 21 kgf, an attempt was made to prepare a fibril-like fiber aggregate in the same manner as in Comparative Example 1, but it was not properly cut in the processing step, so that the fibrous web was not formed, and an unaligned portion was generated.

1: feed roller
2: cylinder
3: doffer
4: flat bar
5: stripper

Claims (15)

An apparatus for producing a fibrous web, fibril-like fiber aggregate or non-woven fabric from a woven fabric,
Feed rollers; A cylinder in which a flat bar is provided on the surface; Doffer; And a stripper (stripper); includes,
3 to 4 flat bars are provided per cylinder,
A tooth is formed on the surface of each of the feed roller, flat bar, cylinder, doper, and stripper,
The bedding fabric formed on the surface of the flat bar satisfies all the conditions of 0.5 to 5.0 mm in height, 50 to 90° in angle, 0.5 to 2.5 mm in thickness, and 3 to 20 pieces/inch in number,
The woven fabric is supplied to the cylinder through the feed roller, and after passing between the flat bar and the cylinder, it is operated to sequentially pass through the doper and stripper,
Device. The method of claim 1,
The bedding fabric formed on the surface of the feed roller satisfies one or more of the conditions of 2.0 to 6.0 mm in height, 50 to 85° in angle, 0.5 to 2.5 mm in thickness, and 3 to 20 pieces/inch in number,
The bedding fabric formed on the cylinder surface satisfies one or more of the conditions of 2.0 to 6.0 mm in height, 50 to 85° in angle, 0.5 to 2.5 mm in thickness, and 3 to 20 pieces/inch in number,
The bedding fabric formed on the doffer surface satisfies one or more of the conditions of 2.0 to 6.0 mm in height, 30 to 80° in angle, 0.5 to 2.5 mm in thickness, and 3 to 20 pieces/inch in number,
The bedding fabric formed on the surface of the stripper satisfies one or more of the conditions of 2.0 to 6.0 mm in height, 30 to 80° in angle, 0.5 to 2.5 mm in thickness, and 3 to 20 pieces/inch in number,
Device. The method of claim 1,
The feed roller operates at a speed of 0.1-1 mpm (meter per minute),
The cylinder operates at a speed of 100 to 350 rpm (revolution per minute),
Doffer operates at a rate of 2 to 4 meters per minute (mpm),
Device. A method for producing a fibrous web comprising the step of passing the woven fabric through the device of any one of claims 1 to 3 to form a fibrous web. Processing the woven fabric into a fibrous web by passing it through the device of any one of claims 1 to 3; And calendering a plurality of the fibrous webs; including, a method for producing a fibril-like fiber aggregate. Processing the woven fabric into a fibrous web by passing it through the device of any one of claims 1 to 3; Combining a plurality of the fibrous webs in a non-woven manner; And calendering the combined plurality of fibrous webs. A fibrous web manufactured by the method of claim 4 and having a weight per unit area of 10 g/m ² to 60 g/m ^2. A fibril-like fiber assembly manufactured by the method of claim 5 and having a weight per unit area of 100 g/m ² to 600 g/m ^2. A nonwoven fabric manufactured by the method of claim 6 and having a weight per unit area of 50g/m ² to 600g/m ^2. A hemostatic agent comprising the fibrous web of claim 7. A hemostatic agent comprising the fibril-like fiber aggregate of claim 8. A hemostatic agent comprising the nonwoven fabric of claim 9. Anti-adhesion agent comprising the fibrous web of claim 7. An anti-adhesion agent comprising the fibril-like fiber aggregate of claim 8. Anti-adhesion agent comprising the non-woven fabric of claim 9.

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