JP6764439B2 - Non-woven - Google Patents

Description

The present invention relates to a non-woven fabric containing cotton fibers.

Patent Document 1 discloses a method for producing a fiber sheet containing cotton fibers and two or more kinds of synthetic fibers different from each other. In the method for producing a fiber sheet described in Patent Document 1, first, a web of cotton fibers is superposed on one side of a non-woven fabric containing synthetic fibers. Next, a high-pressure water stream is sprayed from the web side of the cotton fiber to allow the cotton fiber to enter the fiber network of the non-woven fabric and entangle with the fiber network.

JP-A-2007-270419 JP-A-2006-150010

If a large amount of foreign matter is mixed in the raw cotton of the cotton fiber, the foreign matter cannot be completely removed when the non-woven fabric is manufactured using the raw cotton, and a large amount of foreign matter may remain in the non-woven fabric.

In addition, the cotton fibers are difficult to heat-fuse with the synthetic fibers constituting the non-woven fabric, and the cotton fibers may fall off or come off from the synthetic fibers. In particular, the fine fibers in the cotton fibers are likely to fall off from the synthetic fibers. If fine cotton fibers (fine powder) fall off from synthetic fibers during the manufacturing process of the non-woven fabric, there is also a problem that the fine powder adheres to various facilities deployed during the manufacturing process.

Therefore, it is desired to provide a non-woven fabric capable of suppressing at least one of the remaining foreign matter in the non-woven fabric and the adhesion of fine powder to various facilities deployed during the manufacturing process.

The nonwoven fabric in one embodiment is a nonwoven fabric containing synthetic fibers and cotton fibers, wherein the ratio of the weight of the cotton fibers to the total weight of the nonwoven fabric is less than 50% and has a fiber length of less than 0.3 mm. The number of cotton fibers is 1% or less of the number of fibers having a fiber length of 0.3 mm or more.

It is possible to suppress at least one of the remaining foreign matter in the non-woven fabric and the adhesion of fine powder to various facilities deployed during the manufacturing process.

FIG. 1 is a schematic view showing one process of a method for producing a nonwoven fabric according to an embodiment. FIG. 2 is a schematic diagram showing the process following FIG. FIG. 3 is a schematic view showing a cross section of the nonwoven fabric according to the embodiment. FIG. 4 is a schematic view showing a cross section of the nonwoven fabric according to another embodiment. FIG. 5 is a plan view of the absorbent article according to the embodiment. FIG. 6 is a plan view of the absorbent article as viewed from the opposite side of FIG.

The description of this specification and the accompanying drawings will clarify at least the following matters.

A method for manufacturing non-woven fabrics containing cotton fibers.
Steps to prepare cotton fiber raw cotton,
The step of forming the raw cotton into a web shape and
A step of placing the cotton fiber web on a mesh and spraying a stream of water onto the cotton fiber web to form a sheet.
The step of opening the cotton fiber sheet to form cotton-like cotton fibers,
A method for producing a non-woven fabric, which comprises a step of forming a non-woven fabric from a mixed fiber of a synthetic fiber and the cotton-like cotton fiber.

Cotton fibers contain a large amount of fibers having a small fiber length. In the above manufacturing method, a web of cotton fibers is placed on a mesh, and a stream of water is sprayed onto the web of cotton fibers to form a sheet, thereby removing cotton fibers having a small fiber length. As a result, in the steps after this step (particularly the step of forming the non-woven fabric from the mixed fibers), it is possible to suppress the falling off of the cotton fibers having a small fiber length. In addition, fine foreign matter also falls off through the mesh due to the injection of water flow. Therefore, it is possible to prevent fine powder from adhering to various facilities deployed during the manufacturing process.

As described above, in order to remove foreign substances and fine fibers, cotton fibers are intentionally once formed into a sheet shape. Then, in order to produce a non-woven fabric containing both synthetic fibers and cotton fibers, a sheet of cotton fibers is opened to form cotton-like cotton fibers.

According to a preferred embodiment, the ratio of the weight of the cotton fibers to the total weight of the mixed fibers is less than 50%. Since the cotton fiber is hard to be heat-sealed, it easily falls off from the non-woven fabric. In this embodiment, since the amount of cotton fibers is relatively small, it is possible to prevent the cotton fibers from falling off.

According to a preferred embodiment, the mesh opening ratio is 5-40% or less. By setting the aperture ratio of the mesh to 5 to 40% or less, it is possible to effectively remove cotton fibers having a short fiber length that easily fall off as fine powder during the manufacturing process.

According to a preferred embodiment, the opening diameter of the mesh is in the range of 0.2 mm to 0.6 mm. By setting the opening diameter of the mesh to 0.2 mm to 0.6 mm, it is possible to effectively remove cotton fibers having a short fiber length that easily fall off as fine powder during the manufacturing process, for example, cotton fibers having a fiber length of 0.3 mm or less. be able to.

According to a preferred embodiment, the cotton fiber is an organic cotton fiber. Since organic cotton fiber is cultivated with no pesticides or low pesticides, it can give the user a sense of security that it is kind to the global environment and to the skin.

However, since the raw cotton of organic cotton fiber is manually picked from the plant that produces cotton without using chemicals such as defoliants, foreign matter consisting of fragments such as leaves and stems of the plant is organic cotton fiber. It is contained in a large amount in the raw cotton. In addition, since a large amount of foreign matter consisting of fragments such as leaves and stems of a plant is mixed in, it becomes difficult to find other minute foreign matters. For these reasons, in general, foreign matter cannot be completely removed from the raw cotton of the organic cotton fiber, and a large amount of foreign matter may remain in the non-woven fabric containing the organic cotton fiber. However, according to the present invention, the minute foreign matter can be removed through the opening of the mesh by the step of injecting a stream of water onto the cotton fiber sheet, so that the minute foreign matter can be removed more effectively. Further, if the step of removing the foreign matter described later is carried out, the foreign matter exposed on the surface of the non-woven fabric can be removed more effectively. As described above, such a method for producing a non-woven fabric is more effective when applied to a non-woven fabric containing organic cotton fibers.

According to a preferred embodiment, the foreign matter appearing on the surface of the cotton fiber sheet is formed between the step of injecting a stream of water onto the cotton fiber web to form a sheet and the step of forming the cotton-like cotton fiber. It has an additional step of removal.

In this manufacturing method, the cotton fiber web is placed on the mesh, and the water stream is sprayed onto the cotton fiber web to form a sheet, so that the water stream sprayed from the surface of the cotton fiber web pushes away the fibers around the foreign matter. .. This allows foreign matter to be exposed on the surface of the cotton fiber sheet. The pressure of the water flow is preferably adjusted as appropriate so that foreign matter can be exposed more. As described above, since the foreign matter is exposed on the surface of the cotton fiber sheet, the foreign matter can be effectively removed from the cotton fiber sheet. Further, since the foreign matter is removed in the state of the cotton fiber sheet before the synthetic fiber is mixed, the dispersion of the foreign matter due to the mixing of the synthetic fiber can be suppressed, and the foreign matter can be more easily removed.

According to a preferred embodiment, the cotton fibers have an average fiber length shorter than the average fiber length of the synthetic fibers. By increasing the average fiber length of the synthetic fiber 12, the strength of the entire non-woven fabric can be improved, and fluffing of the fiber during production and use can be suppressed. On the other hand, by shortening the average fiber length of the cotton fibers 10, the heat fusion points between the synthetic fibers 12 can be reduced, and appropriate flexibility as a non-woven fabric can be realized.

A non-woven fabric containing synthetic fibers and cotton fibers.
The ratio of the weight of the cotton fiber to the weight of the entire non-woven fabric is less than 50%.
A non-woven fabric in which the number of the cotton fibers having a fiber length of less than 0.3 mm is 1% or less of the number of fibers having a fiber length of 0.3 mm or more.

Since the number of cotton fibers having a fiber length of less than 0.3 mm is small, it is possible to prevent the cotton fibers from falling off during the manufacturing process of the non-woven fabric.

According to a preferred embodiment, the cotton fibers form a plurality of fiber lumps in the non-woven fabric. By forming the fiber mass of the cotton fiber, it is possible to prevent the cotton fiber from falling off from the non-woven fabric.

According to a preferred embodiment, the plurality of fiber lumps are provided unevenly in the central portion of the nonwoven fabric in the thickness direction of the nonwoven fabric. Since the fiber mass made of cotton fibers is located at the center of the non-woven fabric in the thickness direction, it is possible to prevent the cotton fibers from falling off from the non-woven fabric.

According to a preferred embodiment, the synthetic fiber comprises less than 2.0 dtex fibers. When the synthetic fiber contains a fine-count fiber, the synthetic fiber can further prevent the fiber mass of the cotton fiber from falling off.

According to a preferred embodiment, the cotton fiber is an organic cotton fiber. The advantages of using organic cotton fibers are as described above.

According to a preferred embodiment, the cotton fibers have an average fiber length shorter than the average fiber length of the synthetic fibers. By increasing the average fiber length of the synthetic fiber 12, the strength of the entire non-woven fabric can be improved, and fluffing of the fiber during production and use can be suppressed. On the other hand, by shortening the average fiber length of the cotton fibers 10, the heat fusion points between the synthetic fibers 12 can be reduced, and appropriate flexibility as a non-woven fabric can be realized.

Hereinafter, embodiments will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one. Therefore, the specific dimensions, etc. should be determined in consideration of the following explanation. In addition, there may be parts in which the relationship and ratio of dimensions of the drawings are different from each other.

FIG. 1 is a schematic view showing one process of a method for producing a nonwoven fabric according to an embodiment. FIG. 2 is a schematic diagram showing the process following FIG. The manufacturing method according to the embodiment relates to a manufacturing method of a non-woven fabric containing cotton fibers.

First, prepare raw cotton of cotton fiber. The cotton fiber may be an organic cotton fiber. Here, "organic cotton" means cotton whose organicity is certified based on international standards (standards of each country according to CODEX) at the agricultural stage.

Next, the raw cotton of the cotton fiber 10 is formed into a web shape (step S1). For example, the raw cotton of the cotton fiber 10 can be formed in a web shape by the carding device 20. The web-shaped cotton fiber 10 is conveyed on the conveying belt.

Next, it is preferable to moisten the web of the cotton fiber 10 before step S3 described later (step S2). Step S2 may be performed arbitrarily. The cotton fiber 10 can be humidified by, for example, a humidifying device 30 that injects water droplets. By moistening the web of the cotton fiber 10 and then injecting a high-pressure water stream in step S3, a sheet having a more uniform fiber density can be obtained.

Next, the web of the cotton fiber 10 is placed on the mesh 50, and a stream of water is sprayed onto the web of the cotton fiber 10 to form a sheet (step S3). The water flow jetted onto the web of the cotton fiber 10 is jetted at high water pressure from a nozzle having a small nozzle diameter by the injection device 40.

As a result, the cotton fiber 10 having a small fiber length is removed through the opening of the mesh 50. Further, by injecting a water stream, fine foreign matter is also removed through the opening of the mesh 50. Therefore, in the steps after this step S3 (particularly the step of forming the non-woven fabric from the mixed fibers), it is possible to suppress the falling off of the cotton fibers 10 having a small fiber length. As a result, it is possible to prevent fine powder from adhering to various facilities deployed during the manufacturing process.

Further, in this step S3, by injecting a water stream onto the web of the cotton fiber 10, the cotton fiber 10 is moved away from the hard foreign matter, so that the foreign matter is likely to appear on the surface of the cotton fiber 10. Therefore, foreign matter can be made conspicuous on the surface of the sheet of the cotton fiber 10. This makes it possible to remove foreign matter more reliably.

The aperture ratio of the mesh is preferably in the range of 5-40%, more preferably 5-20%. As a result, it is possible to effectively remove cotton fibers having a short fiber length that easily fall off as fine powder during the manufacturing process. The opening diameter of the mesh is preferably 0.2 mm to 0.6 mm, more preferably 0.25 mm to 0.45 mm.

In FIG. 1, a stream of water is sprayed onto the web of the cotton fiber 10 from one side of the sheet of the cotton fiber 10. The water stream sprayed onto the web of the cotton fiber 10 sheet can push the fibers around the foreign matter away, exposing the foreign matter onto the sheet. As a result, foreign matter can be exposed on the surface of the sheet more effectively. It is preferable that the pressure of the water flow sprayed onto the sheet of the cotton fiber 10 is appropriately adjusted so that foreign matter is easily exposed on the surface of the sheet.

Next, the sheet of cotton fiber 10 is dried (step S4). Drying of the sheet of cotton fiber 10 is carried out using a dryer 60.

Next, the foreign matter appearing on the surface of the sheet of the cotton fiber 10 is removed (step S5). As a specific example, foreign matter exposed on the surface of the cotton fiber 10 sheet is removed after first spraying a water stream onto the web of the cotton fiber 10 and before opening the cotton fiber sheet described later. The position of the foreign matter may be automatically identified by the camera 70. In step S3, since the foreign matter appears on the surface of the sheet of the cotton fiber 10, the foreign matter can be removed more reliably.

The sheet W of the cotton fiber 10 from which the foreign matter has been removed may be wound around the roll R at one end.

Next, a sheet of cotton fibers is opened to form cotton-like cotton fibers. It should be noted that the cotton fibers having a small fiber length are largely removed by the above steps S1 to S5. In particular, by adjusting the water flow pressure and the floor efficiency of the mesh in step S3, the number of cotton fibers 10 having a fiber length of less than 0.3 mm can be reduced to the number of cotton fibers 10 having a fiber length of 0.3 mm or more. It is preferably 1% or less. As a result, it is possible to prevent the cotton fibers from falling off during the manufacturing process of the non-woven fabric. In addition, it is possible to reduce the number of particularly fine fibers in the cotton fibers, that is, the fibers that easily fall off from the gaps between the fibers of the non-woven fabric, and it is possible to suppress the generation of fine powder during the manufacturing process. Further, when a sheet using cotton fibers is used for an article to be worn, it is possible to suppress a decrease in the joint strength between sheets due to the fine fibers that have fallen off, thereby ensuring the moldability of the product and the strength during use. ..

Next, a non-woven fabric is formed from a mixed fiber of the synthetic fiber 12 and the cotton-like cotton fiber 10. The synthetic fiber 12 may be a fiber made of a thermoplastic resin. Examples of the fiber made of a thermoplastic resin include an olefin resin, a polyester resin, a polyamide resin, and any combination thereof. The fibers made of the thermoplastic resin may be coated with an oil agent. The fiber made of a thermoplastic resin may be hydrophilized by a hydrophilizing oil agent or may be made water repellent by a water repellent oil agent, depending on the purpose.

An example of a method for forming a non-woven fabric from mixed fibers will be described with reference to FIG. First, the synthetic fiber 12 is supplied by the carding device 102 of the first stage. Further, the carding device 104 in the second stage supplies the cotton fibers 10 that have undergone the above steps S1 to S5. Since the cotton fiber 10 is a soft material having low rigidity, it can be made into a lumpy fiber lump 11 by a pin of a carding device 104. Further, the synthetic fiber 12 is supplied by the carding device 106 of the third stage. As a result, a mixed fiber in which the fiber mass 11 made of cotton fibers is unevenly arranged in the center in the thickness direction is formed. As a result, it is possible to prevent the fiber mass 11 from falling off from the mixed fiber.

The non-woven fabric 13 is manufactured by sending the above-mentioned mixed fibers to, for example, a through-air type heating chamber 110 and heat-sealing the synthetic fibers 12. The cotton fibers 10 are not heat-sealed and stay in the non-woven fabric 13 due to the entanglement of the fibers.

The ratio of the weight of the cotton fiber 10 to the weight of the entire mixed fiber, that is, the entire non-woven fabric is 2% to 50%, preferably 3 to 35%, and more preferably 3 to 10%. By relatively reducing the amount of the cotton fiber 10, it is possible to prevent the cotton fiber from falling off from the non-woven fabric.

The fineness of the synthetic fiber 12 is not particularly limited, but is in the range of 1.1 to 8.8 dtex, preferably 1.5 to 4.6 dtex, from the viewpoint of strength, flexibility, touch, liquid permeability, etc. of the non-woven fabric. Is preferable.

Further, a synthetic fiber containing a fiber having a fineness of less than 2.0 dtex, preferably 10 to 40%, more preferably 20 to 30%, may be used as a fiber having a fineness of 2.0 dtex or more. In this case, synthetic fibers having a short fiber length can be included while keeping the average fiber length long. When the synthetic fiber 12 contains a fine-count fiber, it is possible to further prevent the fiber mass of the cotton fiber from falling off from the non-woven fabric.

FIG. 3 is a cross-sectional view of the nonwoven fabric 13 produced by the above method. The cotton fiber 10 forms a plurality of fiber lumps 11 in the non-woven fabric. The cotton fiber 10 may have an average fiber length shorter than that of the synthetic fiber 12. This makes it easier for the cotton fiber 10 to form a fiber mass 11 in the non-woven fabric.

As shown in FIG. 3, it is preferable that the plurality of fiber lumps 11 are provided unevenly toward the center side of the nonwoven fabric 13 in the thickness direction T. Here, in the thickness direction T, the non-woven fabric 13 is divided into three equal parts, the surface side layers T2 and T3 and the central layer T1, and 60% or more, preferably 70% or more of the plurality of fiber lumps 11. Is present in the central layer T1, and it is assumed that the plurality of fiber lumps 11 are provided unevenly in the center of the non-woven fabric in the thickness direction T.

Since the fiber mass 11 of the cotton fiber is provided unevenly in the center of the non-woven fabric 13, it is possible to prevent the fiber mass 11 of the cotton fiber from falling off from the non-woven fabric 13.

X-ray CT can be used to confirm the bias of the fiber mass 11 in the thickness direction. Specifically, for the non-woven fabric including the portion of the fiber mass 11 to be measured, X-ray CT (for example, FLEX-M863 manufactured by Beamsense Co., Ltd.) so that one surface of the non-woven fabric is photographed from the other surface. Taken by. By confirming 10 fiber lumps 11 in the same non-woven fabric using the image obtained by photographing, the bias of the fiber lumps 11 can be determined. It should be noted that it can be confirmed whether or not the fiber mass 11 in the sample after photography is a fiber mass 11 of cotton fibers by using a dyeing method using Kayastain Q, which will be described later.

The non-woven fabric generally preferably has a basis weight in the range of 10 to 60 g / cm2. The thickness of the non-woven fabric is preferably 0.5 to 5.0 mm, more preferably 0.8 to 3.5 mm. The thickness of the non-woven fabric can be measured using a thickness gauge (Peacock dial thickness gauge manufactured by Ozaki Seisakusho Co., Ltd.) having a measuring terminal having a measuring pressure of 3 g / cm2 and a diameter of 10 mm. Specifically, the thicknesses of 10 different points of the non-woven fabric of interest are measured, and the "thickness" is obtained from the average value.

In the non-woven fabric having the above thickness, it is preferable that the weight ratio of the cotton fiber to the synthetic fiber is smaller than 25%. Under this condition, by providing the fiber mass 11 unevenly in the center of the non-woven fabric in the thickness direction, it is possible to further suppress the falling off of the cotton fiber during the manufacturing process and the product use.

The weight ratio of the cotton fiber to the synthetic fiber can be calculated by the following method. First, a test piece having a unit area (for example, 5 cm × 5 cm) is taken out from the non-woven fabric. Cotton fibers are taken out from this test piece, and the weight of the taken out cotton fibers is measured. This makes it possible to calculate the weight ratio of cotton fibers to synthetic fibers.

In addition, when taking out the cotton fiber from the test piece, it is necessary to discriminate the difference between the synthetic fiber and the cotton fiber. Whether the fibers in the non-woven fabric are made of cotton fibers or synthetic fibers can be confirmed by the following method. First, the same amount of Kayastain Q (manufactured by Nippon Kayaku Co., Ltd.) as the test piece is weighed and dissolved in ion-exchanged water (60 to 70 degrees) having a weight 100 times that of Kayastain Q. The solution is heated, and just before the solution boils, a test piece washed with a neutral detergent is put into the solution. Then, the solution was boiled for 5 minutes, and then the test piece was immediately washed with water and dried. At this point, the fiber mass is dyed in a color corresponding to the type of fiber. After that, the fiber mass can be discriminated based on the hue of Kayastain Q to various fibers.

FIG. 3 shows a cross section of a single layered nonwoven fabric. Instead, the nonwoven fabric may be composed of a plurality of layers (see FIG. 4). FIG. 4 shows a cross section of a non-woven fabric having a two-layer structure. In the case of such a non-woven fabric, the carding device 106 of the third stage is unnecessary when forming the mixed fiber of the synthetic fiber 12 and the cotton fiber 10. As a result, the fiber mass 11 of the cotton fiber 10 is unevenly arranged on one surface of the mixed fiber. By laminating two such non-woven fabrics to each other, a two-layer non-woven fabric as shown in FIG. 4 can be formed. When such a non-woven fabric is bonded, it is preferable that the fiber mass 11 of the cotton fibers 10 is unevenly arranged in the center of the non-woven fabric having a two-layer structure (center in the thickness direction T). Thereby, the cotton fiber 10 can be prevented from falling off.

As shown in FIGS. 3 and 4, it is preferable that a region 15 having a density lower than that of the fiber mass 11 and the synthetic fiber 12 is formed around the fiber mass 11. By forming a low-density portion around the fiber mass 11 of the cotton fiber 10, it is possible to reduce the external force due to bending and friction of the non-woven fabric and the load applied to the fiber mass 11 during sheet transportation during the manufacturing process. It is possible to prevent the fiber mass 11 from falling off and the sheet around the cotton fiber from fluffing.

Further, when the fiber mass 11 made of the cotton fiber 10 absorbs water, the fiber mass 11 expands. At this time, since there is a region having a low density around the fiber mass 11, the fiber mass 11 can be expanded without being strongly pressed from the surroundings. Therefore, the fiber mass 11 can absorb water more effectively. As a result, the moisturizing effect of the cotton fiber 10 can be sufficiently exhibited.

The cotton fiber 10 contained in the non-woven fabric preferably has an average fiber length shorter than the average fiber length of the synthetic fiber 12 and / or a fineness finer than the fineness of the synthetic fiber 12. By increasing the average fiber length of the synthetic fiber 12 and / or increasing the fineness of the synthetic fiber 12, the strength of the entire non-woven fabric can be improved, and the fluffing of the fiber during production and use can be suppressed. Can be done. On the other hand, by shortening the average fiber length of the cotton fiber 10 and / or reducing the fineness of the cotton fiber 10, the heat fusion points between the synthetic fibers 12 can be reduced, and appropriate flexibility as a non-woven fabric can be realized.

The "average fiber length" is defined as "A7.1.1 Method A (standard method)" of "A7.1 Fiber Length Measurement" in Annex A of JIS L 1015: 2010. Individual fibers on a graduated glass plate. The average fiber length measured according to "Method for measuring the length of the fiber". The above method corresponds to a test method equivalent to ISO 6989 published in 1981.

FIG. 5 is a plan view of the absorbent article 1 according to the embodiment. FIG. 6 is a plan view of the absorbent article 1 as viewed from the opposite side of FIG. The absorbent article 1 has a longitudinal direction L and a width direction W. The longitudinal direction L is a direction extending from the front side (ventral side) of the wearer to the rear side (dorsal side), or a direction extending from the rear side to the front side of the wearer. The width direction W is a direction orthogonal to the longitudinal direction L. Hereinafter, the side facing the skin of the wearer at the time of use may be referred to as "skin side". In addition, the side that is turned away from the wearer's skin during use may be referred to as the "non-skin side".

The absorbent article 1 has a front surface sheet 3, a back surface sheet 4, and an absorber 7. The absorber 7 is provided between the front surface sheet 3 and the back surface sheet 4. The surface sheet 3 may be composed of a liquid permeable sheet.

A liquid-impermeable leak-proof sheet 5 may be provided between the back surface sheet 4 and the absorber 7. The leak-proof sheet 5 covers at least the absorber 7. The back surface sheet 4 covers the leak-proof sheet 5 and extends to the outside of the leak-proof sheet 5. The region of the back surface sheet 4 that does not overlap with the leak-proof sheet 5 extends from the front end to the rear end in the longitudinal direction L on both outer sides in the width direction W. In FIG. 6, a region of the back surface sheet 4 that does not overlap with the leak-proof sheet 5 is indicated by diagonal lines.

The front surface sheet 3 and the back surface sheet 4 are made of a non-woven fabric. This non-woven fabric may be produced by the method described above. That is, this non-woven fabric contains synthetic fibers and cotton fibers.

Although the present invention has been described in detail using the above-described embodiments, it is clear to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and modifications without departing from the gist and scope of the present invention determined by the description of the claims. Therefore, the description in this specification is
It is for the purpose of exemplification and has no limiting meaning to the present invention.

For example, in the above embodiment, a method for producing a non-woven fabric using a through-air type heating chamber is shown. Alternatively, any other known method can be employed to produce the nonwoven fabric from the mixed fibers.

Claims (6)

A non-woven fabric containing synthetic fibers and cotton fibers.
The ratio of the weight of the cotton fiber to the weight of the entire non-woven fabric is less than 50%.
Number of cotton fibers having a fiber length of less than 0.3mm is Ri 1% der less number of fibers having a fiber length of more than 0.3mm,
The non-woven fabric is
A first region in which a plurality of fiber lumps composed of the cotton fibers are present, and
The second region where the synthetic fiber is present and
It has a third region, which is formed around the plurality of fiber lumps and is a region between the first region and the second region.
A non-woven fabric in which the density of the third region is smaller than the density of the first region and the density of the second region . The non-woven fabric according to claim 1 , wherein the plurality of fiber lumps are provided unevenly in the central portion of the non-woven fabric in the thickness direction of the non-woven fabric. The nonwoven fabric according to claim 1 or 2 , wherein the synthetic fiber contains a fiber having a fineness of less than 2.0 dtex. The non-woven fabric according to any one of claims 1 to 3 , wherein the cotton fiber is an organic cotton fiber. The non-woven fabric according to any one of claims 1 to 4 , wherein the cotton fiber has an average fiber length shorter than the average fiber length of the synthetic fiber. The non-woven fabric according to any one of claims 1 to 5, wherein the synthetic fiber contains 10 to 40% of fibers having a fineness of less than 2.0 dtex in a fiber having a fineness of 2.0 dtx or more.

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