JP2001262454A - Inorganic powder-bearing nonwoven fabric sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonwoven fabric sheet surely carrying the sufficient amount of inorganic powder so as to effectively exhibit the excellent function of the inorganic powder without impairing both the flexibility and air permeability inherent in nonwoven fabric sheet. SOLUTION: This nonwoven fabric sheet S is provided with a meshy sheet layer 10 consisting of a nonwoven fabric or the like coated with an inorganic powder-containing coating agent and non-meshy nonwoven fabric layers 20 and 30 provided respectively on both sides of the meshy sheet layer 10, and the respective layers 10, 20 and 30 are compoundedly unified together by water jet treatment. The meshy sheet layer 10 is hard to get rigid even if it carrys a large amount of the inorganic powder, enabling its air permeability to be retained as well, and both the non-meshy nonwoven fabric layers 20 and 30 serve to prevent the inorganic powder from being exposed or dropping off and make skin touch better.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic powder-carrying nonwoven fabric sheet, which is used for various kinds of clothing and bedding, and has a function of deodorizing and far-infrared radiation by supporting inorganic powder. This is a technology for seats.

[0002]

2. Description of the Related Art Conventionally, a heat insulating sheet is known in which an inorganic powder having a heat insulating function by a far-infrared radiation effect is sandwiched between two nonwoven sheets and the upper and lower nonwoven sheets are joined. When manufacturing a nonwoven sheet, or disperse and support the inorganic powder as described above between the fibers,
There is also known a technique of manufacturing a similar sheet material by applying a liquid agent in which inorganic powder is dispersed and blended on the surface of a nonwoven sheet or impregnating the nonwoven sheet.

[0003] A technique is also known in which antibacterial particles, deodorant particles, hygroscopic particles, and the like are used in addition to particles having a heat retaining function to impart each function to a nonwoven fabric sheet.

[0004]

In the technique of sandwiching an inorganic powder between nonwoven fabric sheets or producing a nonwoven fabric sheet by dispersing the inorganic powder, the inorganic powder is liable to be insufficiently supported. There is a problem that the inorganic powder later falls off the nonwoven fabric sheet. In particular, as the loading amount of the inorganic powder is increased in order to enhance the above-mentioned heat retaining function and antibacterial function, the loading on the nonwoven fabric sheet becomes more difficult, and the inorganic powder falls off during use. When the nonwoven fabric sheet is repeatedly washed, many parts of the inorganic powder fall off, and the intended function cannot be sufficiently exhibited.

[0005] If the nonwoven fabric sheet is coated or impregnated with a liquid material containing the inorganic powder, the above-mentioned inorganic powder is less likely to fall off. However, when the applied or impregnated inorganic powder compounding liquid solidifies, there arises a problem that the surface texture and air permeability of the nonwoven fabric sheet are impaired. If the coating film covers the surface of the nonwoven sheet, the elasticity and flexibility peculiar to the nonwoven sheet are lost. In addition, the air permeability of the nonwoven fabric sheet is also reduced because the coating film impedes ventilation. Even when the nonwoven fabric sheet is impregnated with the liquid agent, the fibers constituting the nonwoven fabric sheet are covered or gaps between the fibers are filled.

An object of the present invention is to ensure that a sufficient amount of inorganic powder is supported on a nonwoven sheet so that the excellent function of the inorganic powder can be effectively used without impairing the flexibility and air permeability of the nonwoven sheet. It is to show it to.

[0007]

The inorganic powder-carrying nonwoven fabric sheet of the present invention is arranged on both sides of a mesh sheet layer coated with a coating agent containing an inorganic powder and the mesh sheet layer. A non-mesh nonwoven fabric layer, and the above-mentioned layers are combined and integrated by water jet treatment. Hereinafter, the water jet processing may be abbreviated as WJ processing. [Inorganic powder] Various natural and synthetic inorganic powders can be used according to the intended function. Examples thereof include alumina having far-infrared radiation, titanium having antibacterial properties, metal-supported zeolite having an antibacterial metal supported on zeolite, and charcoal having deodorant properties and far-infrared radiation effect.
A material obtained by compounding an organic material with an inorganic powder can also be used.
For example, wood powder having deodorant properties and antibacterial properties can be used. As the inorganic powder, an abrasive material used for grinding and polishing in the field of mechanical technology can be used.
The abrasive material contains one or more of the various inorganic powders described above, and is easily available.

The particle size of the inorganic powder can be set in consideration of dispersibility in a coating agent, handleability, functionality during use, and the like.
Specifically, a range of 1 to 30 μm can be adopted. By firing the inorganic powder, the color tone can be changed. For example, by firing the abrasive material at 600 to 800 ° C., the gray material before firing became ocher or reddish brown after firing. [Coating Agent] The material and manufacturing method of the coating agent are not particularly limited as long as the above-mentioned inorganic powder can be made into a liquid agent that can be applied to a nonwoven fabric sheet.

[0009] An adhesive component or a binder component for bonding the inorganic powder to the non-woven fabric sheet is blended in the coating agent. Adhesives used for ordinary fibers and nonwoven fabrics can be used as they are. For example, a solvent-type urethane resin-based adhesive can be used as the adhesive. Coating agents include 1
Only one type of inorganic powder may be blended, or a plurality of types of inorganic powders may be combined. In addition to the inorganic powder, an organic antibacterial agent, a deodorant, and the like can be blended. [Mesh-like sheet layer] The entire mesh-like sheet is a sheet having a large number of holes penetrating the front and back.

[0010] As a material for the mesh sheet, gauze, warifu, non-woven fabric, or the like can be used. The mesh-shaped nonwoven fabric can be manufactured by accumulating the fibers constituting the nonwoven fabric in a mesh shape, or after forming a uniform flat nonwoven fabric without a mesh in advance, forming a large number of holes into a mesh shape. You can also. This drilling work,
In addition to the method using a mechanical drilling tool, it is also possible to perform the WJ processing. As the fibers constituting the mesh sheet layer, ordinary fiber materials for knitted and woven fabrics and nonwoven fabrics are used. Natural fibers, synthetic fibers, inorganic fibers and metal fibers can also be used.

The fibers include hydrophobic fibers and hydrophilic fibers, and any fibers can be used. Examples of the hydrophilic fiber include rayon, cotton, wood pulp, and silk. Examples of the hydrophobic fiber include polyester, polyolefin, wool, and the like. A mixture of a hydrophobic fiber and a hydrophilic fiber can be used. It is effective to improve the strength if heat fusible fibers are blended and melted by heat treatment. Since any fiber is hardly exposed on the surface once the coating agent is applied, the fiber composition of the mesh sheet layer has little effect on the surface properties of the nonwoven fabric sheet. A relatively inexpensive material may be used.

The size of the mesh or the through hole in the mesh sheet layer can be set in the range of 1 to 3 mm.
The inorganic powder is supported on the mesh sheet layer by applying the coating agent. For the coating process and the coating device, a coating technology for a normal fiber material or cloth can be applied.
The coating amount varies depending on the required performance of the inorganic powder-carrying nonwoven fabric sheet, the structure of the mesh sheet layer, and the like, but is usually set to approximately 50 to 300 g / m ² . In order to support a large amount of inorganic powder on the mesh sheet, it is possible to impregnate the coating amount with saturation. The greater the basis weight of the mesh sheet layer, the greater the saturated impregnation amount. It is desirable that the coating amount is set so that the mesh of the mesh sheet layer, that is, the through holes is not closed and the flexibility of the mesh sheet layer is not impaired in a state where the coating agent is dried and cured.

As a coating method, various coating techniques such as an S-shaped top coat, a gravure coat, and a roll coat can be applied. [Non-mesh non-woven fabric layer] The non-mesh non-woven fabric means that it does not have a mesh structure or large through holes like the above-mentioned mesh-like sheet layer, and is a normal non-woven fabric. A nonwoven fabric having any material and structure can be used according to the intended use and required performance of the inorganic powder-carrying nonwoven fabric sheet. The same natural fibers, synthetic fibers, inorganic fibers, and metal fibers as those of the mesh sheet layer described above can be used. Either a hydrophobic nonwoven fabric or a hydrophilic nonwoven fabric can be used. Of course, a hydrophobic non-woven fabric or a hydrophilic non-woven fabric may be partially mixed with fibers of the opposite nature.

As the non-mesh nonwoven fabric layer, a laminate of a hydrophilic nonwoven fabric layer and a hydrophobic nonwoven fabric layer can be used. Such a laminated body is obtained by entanglement-integrating both fibers of a previously produced hydrophilic nonwoven fabric and hydrophobic nonwoven fabric by WJ treatment. The non-mesh nonwoven fabric layers are disposed on both sides of the mesh sheet layer on which the inorganic powder is supported. The same nonwoven fabric may be used on both sides, or different nonwoven fabrics may be used according to the required functions. The thickness of the non-meshed nonwoven fabric layer may be set to a thickness that can exhibit the functions required by the use form of the nonwoven fabric sheet. Specifically, the basis weight of the non-mesh nonwoven fabric layer can be set in the range of ²⁰ to 100 g / m ² .

When the non-woven fabric sheet carrying the inorganic powder is used for clothing or the like, a relatively thick non-mesh non-woven fabric layer is disposed on the side close to the user, or the non-mesh non-woven fabric layer has a hygroscopic property. For example, hydrophilic fibers can be used. When a hydrophobic nonwoven fabric layer is disposed on the surface, dirt hardly adheres to the surface, and the surface can be prevented from sticking to improve the touch. [Water jet (WJ) treatment] The mesh sheet layer and the non-mesh nonwoven fabric layers on both sides thereof are combined and integrated by WJ treatment.

In the water jet treatment, a high-pressure water stream is sprayed to entangle the fibers constituting the plurality of nonwoven fabric layers at the sprayed portion with each other, thereby integrally bonding the plurality of nonwoven fabric layers. At the boundary between the nonwoven layers,
A mixed layer in which fibers of both layers are mixed may be formed.
As a specific apparatus and processing conditions for the water jet treatment, ordinary nonwoven fabric manufacturing techniques can be applied. By the water jet treatment, the strength of the nonwoven fabric layer can be made different between the side directly hit by the jet of water and the opposite side.
In this case, a pressure of about 2900 to 16000 kPa can be adopted.

When the water jet treatment is performed intermittently in the plane direction by a jet having a relatively strong pressure, the fibers of both layers are strongly entangled at the location where the jet is hit, and the integrity of the two is increased. Where the jets do not hit, both nonwoven layers remain bulky. As a result, the composited nonwoven fabric sheet can have high integration between a plurality of nonwoven fabric layers, and is bulky and excellent in air permeability, water absorption, heat retention, softness, and the like. Since the portion of the surface of the manufactured nonwoven fabric sheet that is hit by the intermittent strong water flow is depressed, irregularities are formed on the surface of the nonwoven fabric sheet. In such intermittent processing, 7800 to 16
A pressure of about 000 kPa is used.

When the above-mentioned intermittent and strong jet is linearly formed in the surface direction of the nonwoven fabric sheet, uneven lines are formed on the surface of the nonwoven fabric sheet along the passage of the jet. like this,
Uneven lines where multiple nonwoven fabric layers are strongly joined together,
A large number can be juxtaposed at intervals on the surface of the nonwoven fabric sheet. When the WJ treatment is performed on the mesh sheet layer and the non-mesh nonwoven fabric layers on both sides thereof, the fibers of the mesh sheet layer carrying the inorganic powder by coating are fixed, but the non-mesh nonwoven fabric on both sides is fixed. The fibers of the layers are entangled with each other through the through holes in the mesh of the intermediate mesh sheet layer. As a result, the mesh sheet layer and the non-mesh nonwoven fabric layers on both sides thereof are compositely integrated.

[Inorganic powder-carrying nonwoven sheet] Since the nonwoven sheet covers both sides of the mesh sheet layer carrying the inorganic powder with the non-mesh nonwoven layer, the inorganic powder is directly exposed to the outer surface. There is no. However, depending on the fiber density and thickness of the non-mesh non-woven fabric layer covering the surface, the inorganic powder carried on the mesh-like sheet layer or the coating layer thereof may be visible from the outer surface of the non-woven fabric sheet. Absent. The basis weight of the entire nonwoven fabric sheet is 100 to 5
If it is 00 g / m ² , it is easy to use, easy to make such as cutting according to the size, and economical. More preferably, it is 150 to 400 g / m ² .

The nonwoven fabric sheet can be used for any purpose as long as it can effectively exhibit the function of the inorganic powder or an article. For example, it is used for various kinds of clothing requiring heat retention, bedding, house interior materials, welfare and nursing care products, medical use, seats for vehicles such as automobiles and interior use. It can be used as a bedding sheet to be laid on the sick bed of the sick or bedridden elderly. Can be used for toilet seats. It can be laminated inside the cushion, inside the winter vest. It can also be used as seat covers for vehicle seats, pillowcases, hot carpet bedding, pochette-like handbag storage bags, and heat insulation mats. It can also be used as a heat retention sheet for the user's waist.

For use in these applications, the inorganic powder-carrying nonwoven fabric sheet may be used alone, or may be used by being overlapped with another nonwoven fabric sheet or knitted fabric. By arranging the surface of the nonwoven fabric sheet on which the irregularities are formed by the WJ processing on the side closer to the user, the feel and elasticity can be improved.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Structure of Inorganic Powder-Carrying Nonwoven Sheet] FIG. 1 shows a cross-sectional structure of an inorganic powder-carrying nonwoven sheet S, in which a mesh sheet layer 10 and non-mesh nonwoven layers on both sides thereof are provided. 20 and 30. As shown in FIG. 2, the mesh sheet layer 10 has a mesh shape having a large number of spaces vertically, that is, through holes. The mesh sheet layer 10 is coated with a coating agent containing abrasive grains containing an inorganic powder such as alumina, and is dried and cured. As shown in FIG. 1, the non-mesh nonwoven fabric layer 20 on one side includes a hydrophilic nonwoven fabric layer 24 adjacent to the mesh sheet layer 10 and a hydrophobic nonwoven fabric layer disposed on the outer surface of the inorganic powder-carrying nonwoven fabric sheet S. 22.

The mesh sheet layer 10 and the non-mesh nonwoven fabric layers 20 and 30 on both sides thereof are compositely integrated by WJ processing. By performing the WJ treatment intermittently and linearly in the surface direction of the inorganic powder-carrying nonwoven fabric sheet S, the inorganic powder-carrying nonwoven fabric sheet S is relatively relatively bonded to a portion where each of the layers 10 to 30 is firmly integrally joined. The loosely joined portions are alternately arranged in a stripe pattern. At the place where the layers 10 to 30 are firmly joined together, the inorganic powder-carrying nonwoven fabric sheet S
A pair of concave lines 40 and 42 are formed on both surfaces of the.
In particular, in the non-meshed nonwoven fabric layer 20 that becomes the surface when the inorganic powder-carrying nonwoven fabric sheet S is used, a ridge-shaped convex shape in which the space between the pair of concave lines 40 swells in an arc shape is formed.

[Manufacture of non-woven fabric sheet supporting inorganic powder] FIG. 3
1 schematically shows a manufacturing process of an inorganic powder-carrying nonwoven fabric sheet, and the process proceeds from the left side to the right side in the figure. First,
An inorganic powder is supported on the mesh sheet layer 10. While running the long mesh sheet layer 10 in a certain direction, the coating agent 62 containing the inorganic powder is applied to the mesh sheet layer 10 with a coating roll. The mesh sheet layer 10 coated with the coating agent 62 is dried and cured in a drying furnace 64. Mesh sheet layer 1 carrying inorganic powder
The non-mesh non-woven fabric layers 20 and 30 are supplied to both sides of the non-meshed non-woven fabric layer while running on the non-woven fabric.

In a state where the three layers 10 to 30 are superimposed, water jet (WJ) devices 72 and 74 are used to
Perform processing. Multiple (two in the figure) WJ devices 72, 7
By changing the strength and pattern of the jet in 4, 3 layers 10
30 can be satisfactorily integrated. In the device of FIG.
The layers 10 to 30 are simultaneously subjected to WJ processing to be composited,
It can be divided into two stages. For example, after the non-mesh nonwoven fabric layer 30 on the back side is compositely integrated with the mesh sheet layer 10 by WJ processing, the non-mesh nonwoven fabric layer 20 on the front side may be compositely integrated with this composite by WJ processing. it can.

In the above embodiment, another nonwoven fabric layer can be supplied between the mesh sheet layer 10 and the non-mesh nonwoven fabric layers 20 or 30 on both sides to perform composite integration. The coating agent 6 is applied to the mesh sheet layer 10.
2 and drying and curing to produce a mesh-like sheet layer 10 carrying an inorganic powder; and combining the mesh-like sheet layer 10 with the non-mesh nonwoven fabric layers 20 and 30 to form an inorganic powder The step of manufacturing the supported nonwoven sheet S
It can be performed continuously on the same line, or the mesh-like sheet layer 10 supporting the inorganic powder is manufactured in advance, transported to another place, and provided with WJ devices 72, 74 and the like. It can also be supplied to a nonwoven fabric manufacturing apparatus.

[0027]

[Example] [Production of mesh-like nonwoven fabric layer] Rayon fiber
2d x 51mm 70%, heat-fused (NBF) fiber 2d x 51
Feed 30% cotton blend to card machine of non-woven fabric manufacturing equipment
45g / m^TwoWJ processing after obtaining web sheet
And a mesh was formed. WJ
The processing is performed using a WJ wire net 10 mesh, a WJ nozzle 0.
Under the condition of 16 mmφ × 1.0 mm pitch, primary WJ and 2
Next, two-stage processing of WJ was performed. WJ processing pressure is primary 49
03kPa (50kgf / cm^Two), Secondary 9807 kPa (1
00kgf / cm ^Two).

After the WJ treatment, it was dried at 140 ° C. using a thermal dryer. The NBF fiber was melted by the drying treatment. By performing the WJ treatment at a high water pressure using the WJ wire net having a large stitch as described above, the nonwoven fabric after the treatment becomes a mesh. The pore size of the mesh is large enough not to be blocked even when the inorganic powder is applied, and is uniformly formed. Specifically, the average pore diameter of the mesh is 2 mm. The obtained mesh nonwoven fabric is flexible and has sufficient strength. The use of rayon as the fiber facilitates WJ treatment at high water pressure. NBF
By melting the fibers, the tensile strength of the entire mesh-like nonwoven fabric or inorganic powder-carrying nonwoven fabric sheet can be improved.

Next, a coating agent containing an inorganic powder, a solvent type urethane resin-based adhesive and a curing agent was prepared. Using a test coater & laminator, a coating agent was applied to the uncoated mesh-like nonwoven fabric by a gravure coating method. The coating was performed such that the coating agent was saturated and impregnated in the mesh-like nonwoven fabric. The coating amount was 180 g / m ² . It was dried and cured at 110 ° C. The curing agent contained in the coating agent is effective for preventing the occurrence of blocking at the application site of the mesh-shaped nonwoven fabric. However, the flexibility of the mesh-shaped nonwoven fabric can be improved by not adding a curing agent.

[Production of Surface Layer I] A surface layer I made of a non-mesh nonwoven fabric and disposed on one surface of an inorganic powder-carrying nonwoven fabric sheet is produced. Using two card machines A and B, the card machine A supplies a web of PET fiber 2d × 51 mm at 12 g / m ² , and the card machine B supplies PET fiber 2d.
18 g / m ² of a mixed cotton web of 50% × 51 mm and 2d × 51 mm 50% NBF fiber were supplied, and both were laminated. The total fiber composition was 70% PET fiber and 30% NBF fiber, and the basis weight was 30 g / m ² .

The laminated sheet was subjected to WJ treatment to entangle the fibers of both layers to form a composite integral. The processing conditions were as follows: WJ wire net 50 mesh, WJ nozzle 0.10 mmφ × 1.
0mm pitch, WJ processing pressure is 3923kP for primary and secondary
a (40 kgf / cm ² ). After the WJ treatment, it was dried at 105 ° C. The obtained nonwoven fabric is composed of a hydrophobic fiber layer composed of only PET fibers and a mixed fiber layer in which PET fibers and NBF fibers are mixed. Note that, in the subsequent step, the hydrophobic fiber layer and the mixed fiber layer may be bonded to each other at a relatively low WJ processing pressure because the hydrophobic fiber layer and the mixed fiber layer are strongly composited and integrated with the mesh-like nonwoven fabric layer or the like by WJ processing. The drying temperature is set to a temperature at which the NBF fiber does not melt.

[Production of Surface Layer II and Combination with Mesh-Type Nonwoven Fabric Layer] A surface layer II made of a non-mesh nonwoven fabric, which is disposed on the opposite surface of the inorganic powder-carrying nonwoven fabric sheet, is produced. The surface layer II is formed by superimposing a non-meshed nonwoven fabric layer on the previously produced meshed nonwoven fabric to form a composite.
A mesh-shaped nonwoven fabric coated with an inorganic powder is attached to the lower unwinding device of the nonwoven fabric manufacturing apparatus, and is sequentially unwound from one end. From the card machine A of PET fiber 2d × 51mm web 12g / m ²
Is supplied from the card machine B and PET fiber 2d × 51 mm 50
%, NBF fiber 2d x 51mm 50% cotton blend web 18g /
supplying m ^2, and is stacked on the mesh-like nonwoven fabric. The fiber composition of the whole supplied web is PET fiber 70%, NB
The F fiber content was 30%, and the basis weight was 30 g / m ² .

The laminated sheet was subjected to WJ treatment to be integrated into a composite. Processing conditions are WJ wire net 50mesh, WJ
Nozzle 0.10mmφ × 1.0mm pitch, WJ processing pressure is 1
Next 4903kPa (50kgf / cm ² ), Secondary 9807kP
a (100 kgf / cm ² ). 105 ° C after WJ treatment
And dried. The obtained non-mesh nonwoven fabric is basically made of PET fibers, which are hydrophobic fibers, and has NBF fibers added thereto to improve the surface strength.
Since the NBF fiber layer is arranged on the side adjacent to the mesh-like nonwoven fabric layer, exposure to the surface of the inorganic powder-carrying nonwoven fabric sheet is small.

[Production of hydrophilic non-woven fabric layer and complexation with mesh-like non-woven fabric layer] A non-mesh hydrophilic non-woven fabric layer is produced, and the mesh-like non-woven fabric layer obtained in the above step is combined with the surface layer II. The body and the surface layer I are combined and integrated to produce an inorganic powder-carrying nonwoven fabric sheet. The surface layer I is mounted on the upper unwinding device of the nonwoven fabric manufacturing apparatus such that the hydrophobic fiber layer is on the upper side, and is sequentially unwound from one end. Rayon fiber 2 from both card machines A and B
d × 51 mm, weight 2 of two layers of the same material laminated
A 5 g / m ² web sheet is provided.

A composite sheet of a mesh-like nonwoven fabric layer and a surface layer II is mounted on the lower side of the nonwoven fabric manufacturing apparatus such that the surface layer II is on the lower side, and is sequentially rolled up from one end.
These three types of sheet materials are subjected to WJ processing in a stacked state. Processing conditions are WJ wire net 50mesh, WJ
Nozzles are arranged alternately at a pitch of 0.14 mmφ at a pitch of 1.0 mm and a pitch of 4.0 mm, and the WJ processing pressure is 9807 kPa (10
0 kgf / cm ² ). After the WJ treatment, the coating was dried at 140 ° C. and the NBF fibers contained in each layer were heat-sealed. As a result, the obtained inorganic powder-carrying nonwoven sheet is
From one side, a surface layer I, a hydrophilic non-woven fabric layer, an inorganic powder-carrying mesh-like non-woven fabric layer, and a surface layer II are sequentially arranged and combined and integrated. The total basis weight was 304 g / m ² .

In the WJ treatment, a jet of water was able to pass through the front and back surfaces through the through holes of the mesh, and the fibers on both sides were entangled with each other, whereby the composite was firmly integrated. W
By alternately arranging the J nozzles at different pitch intervals, the fibers in each layer are strongly pressed in the thickness direction at the nozzle position to achieve a strong bond, but only a relatively loose bond occurs at the middle position of the nozzle. Thus, the flexibility and bulkiness of the nonwoven fabric are maintained as they are. In addition, as shown in FIG. 1, on the surface of the inorganic powder-carrying nonwoven fabric sheet S, a beautiful striped design in which a pair of concave lines 40 and ridge-shaped bulging shapes are alternately arranged was formed. .

A hydrophobic fiber layer made of PET is disposed on both sides of the inorganic powder-carrying nonwoven fabric sheet on the outermost surfaces, so that the surface is hardly stained, has durability, and is dry without stickiness. State. Since the inner layer contains a layer of hydrophilic fiber made of rayon with a sufficient thickness, moisture and sweat can be favorably absorbed and held. [Performance evaluation of inorganic powder-carrying non-woven fabric sheet] The inorganic powder-carrying non-woven fabric sheet obtained in the previous step (Example) and the non-mesh non-woven fabric layer without using the mesh Various characteristics were measured for the nonwoven fabric sheet coated with the powder (Comparative Example). In addition, the same measurement was performed on the nonwoven fabric sheets of the examples and the comparative examples to which the inorganic powder was not applied.

<Measurement Items> Weight: Measured according to JIS-L1906. Coating amount: Measured according to JIS-L1906. Shear rigidity: measured using a KES-FB1 system manufactured by Kato Tech. Flexural rigidity: Measured using a KES-FB2 system manufactured by Kato Tech. <Measurement results> 無機 Inorganic powder Weight Coating amount Bending rigidity Shear rigidity Coating g / m ² g / m ² gf ・ cm ² / cm gf / cm ・ deg ───────────────────────────── {Example Coating 304 161 0.81 10.3 Non-coating 143-0.35 2.0} ────────── Comparative example Coating 296 159 12.1 91.9 Non-coating 137-0.35 2.1 ───────────────── ──────────────── <Discussion> The bending stiffness and the shear stiffness represent the hardness or rigidity of the nonwoven fabric. The smaller the bending stiffness and the shearing stiffness, the more the softness of the inorganic powder is not applied, and there is almost no difference in performance between the example and the comparative example, but the state where the inorganic powder is applied. In the comparative example, the bending stiffness and the shear stiffness are significantly increased in the comparative example. It can be seen that the examples are much more flexible than the comparative examples, and that they are very soft inorganic powder-carrying nonwoven fabric sheets.

In the comparative example, it was so hard that it could not be gripped in the hand.

[0040]

The inorganic powder-carrying nonwoven fabric sheet of the present invention is
Since the inorganic powder is supported on the mesh sheet layer by coating, the inorganic powder is firmly supported on the mesh sheet layer, and the inorganic powder hardly falls off. Even if part of the inorganic powder falls off from the mesh sheet layer,
Since the non-mesh nonwoven fabric layers are arranged on both sides of the mesh sheet layer, it is possible to prevent the inorganic powder from completely falling off. The mesh sheet layer is relatively flexible and air permeable because there are many spaces penetrating from front to back even when the inorganic powder is applied. Therefore, the flexibility and air permeability of the inorganic powder-carrying nonwoven fabric sheet are also good.

Since the non-meshed nonwoven fabric layers are disposed on both sides of the mesh-like sheet layer on which the inorganic powder is carried by coating, the inorganic powder or its coated layer is not exposed to the outside, and Is improved. Even when the coating agent covers the surface of the non-woven fabric layer and another non-woven fabric layer, WJ treatment is not likely to cause composite unification due to entanglement of the fibers. Since the fibers of the non-mesh nonwoven fabric layer are entangled with each other, the whole inorganic powder-carrying nonwoven fabric sheet has excellent integrity.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view of an inorganic powder-carrying nonwoven fabric sheet according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a layer structure before a composite treatment.

FIG. 3 is a schematic process diagram showing a manufacturing process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mesh-like sheet layer 20, 30 Non-mesh-like non-woven fabric layer 22 Hydrophobic non-woven fabric layer 24 Hydrophilic non-woven fabric layer 40 WJ processing part S Inorganic powder-carrying non-woven fabric sheet

 ──────────────────────────────────────────────────の Continuing from the front page (71) Applicant 595117666 Heiwa Paper Co., Ltd. 4069, Okina, Hidaka-mura, Takaoka-gun, Kochi (72) Inventor Yukio Hayashi 287-4, Hagawa, Ino-cho, Agawa-gun, Kochi 4 Kochi Prefectural Paper Industrial Technology Center (72) Inventor Noriyasu Ike 287-4 Hagawa, Ino-cho, Agawa-gun, Kochi Prefecture Inside the Kochi Prefectural Paper Industrial Technology Center (72) Inventor Junji Sawamura 287-4, Hagawa, Ino-machi, Agawa-gun, Agawa Kochi Prefecture Inside the Kochi Prefectural Paper Industrial Technology Center (72) Inventor Jun Morisawa 287-4 Hagawa, Ino-cho, Agawa-gun, Kochi Prefecture Inside the Kochi Prefectural Paper Industrial Technology Center (72) Inventor Mayu Chikamori 287-4 Hagawa, Ino-cho, Ino-cho, Agawa County, Kochi Prefecture Inside the Kochi Prefectural Paper Industrial Technology Center (72 ) Inventor Katsuno Nishioka 5-73-34 Pier-dori, Kochi City, Kochi Prefecture Inside Ujiden Chemical Industry Co., Ltd. (72) Inventor Kadota Yasuhiro 2424-7, Kitachi, Tosa-shi, Kochi Pref. (72) Inventor Rikuhiro Yamaoka 4069, Hidaka-mura, Takaoka-gun, Kochi 4069 Heiwa Raw Paper Co., Ltd. F-term (reference) 4F100 AA00A AA00H AA19A AA19H AA21A AB01A AB01H AC04A AC04H AD11A AD11H BA04 BA07 BA10C BA10D BA13 CC00A DC16A DD01 DE01A DE01H DG15B DG15C DG15D EC09 GB72 JB05B JB06C JB06D JC00A JC00H JD02 JD12 JD07 J14

Claims (4)

[Claims] 1. A mesh sheet layer coated with a coating agent containing inorganic powder, and a non-mesh nonwoven fabric layer disposed on both sides of the mesh sheet layer, wherein each of the layers is a water jet. An inorganic powder-carrying nonwoven fabric sheet that is compositely integrated by processing. 2. The non-mesh nonwoven fabric layer, a hydrophilic nonwoven fabric layer disposed on one side of the mesh sheet layer, a hydrophobic nonwoven fabric layer disposed on an outer surface side of the hydrophilic nonwoven fabric layer, The inorganic powder-carrying nonwoven fabric sheet according to claim 1, further comprising a hydrophobic nonwoven fabric layer disposed on a surface opposite to the mesh sheet layer. 3. The inorganic powder carrier according to claim 1, wherein the water jet treatment is performed linearly intermittently in a plane direction, and an uneven line is formed on a surface of the inorganic powder carrier nonwoven sheet. Non-woven sheet. 4. The inorganic powder according to claim 1, wherein the inorganic powder contains any one selected from the group consisting of alumina oxide, titanium oxide, zeolite, zeolite carrying antibacterial metal, and charcoal. Body-supported nonwoven sheet.