JP2008307153A - Super low-resilience dust wipe material and manufacturing method for super low-resilience dust wipe material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a super low-resilience dust wipe material capable of eliminating nano-sized fine dusts and suppressing generation of lint from the dust wiper material itself. <P>SOLUTION: The super low-resilience dust wipe material 10 for a clean room includes a flexible base material 20, a first nano fiber layer 30 formed on one surface in the flexible base material 20, and a second nano fiber layer 40 formed on the other surface in the flexible base material 20. Dust-free processing is applied to an end surface of the super low-resilience dust wipe material 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ultra-low dust wiping material and a method for manufacturing an ultra-low dust wiping material.

  In recent years, various wiping materials have been proposed as ultra-low dust wiping materials used in a room where the environment is controlled, such as a clean room. As such an ultra-low dust wiping material, for example, an ultra-low dust wiping material made of a nonwoven fabric is known (see, for example, Patent Document 1).

JP 2001-329458 A

  By the way, ultra-low dust generation wiping materials are required to be able to remove nano-sized minute dust (dust etc.), and from the wiping material itself, minute dust, fibrous debris, material fragments, etc. (Hereinafter, referred to as lint) is required to be small.

  Therefore, the present invention has been made in view of such circumstances, and it is possible to remove nano-sized minute dust and to suppress generation of lint from the wiping material itself. It aims at providing the manufacturing method of a low dust generation wiping material and an ultra-low dust generation wiping material.

  In order to achieve the above object, the present inventors have conducted extensive research to find out from which part of the wiping material the lint is generated in the conventional ultra-low dust generation wiping material. It was found that lint to be generated is generated not only from both surfaces of the wiping material but also from the end surface of the wiping material.

  Therefore, as a result of further research, the present inventors have formed nanofiber layers on both surfaces of the flexible base material, and by performing dust-free treatment on the end surfaces of the wiping material, It is possible to remove dust and suppress the occurrence of lint from both surfaces of the wiping material and from the end surface of the wiping material, and it is found that the above-described object can be achieved, thereby completing the present invention. It came to.

(1) The ultra-low dust generation wiping material of the present invention includes a flexible substrate, a first nanofiber layer formed on one surface of the flexible substrate, and the flexible substrate. An ultra-low dust wiping material comprising a second nanofiber layer formed on the other surface, wherein the end surface of the ultra-low dust wiping material is treated to be dust-free.

  For this reason, according to the ultra-low dust generation wiping material of the present invention, since both surfaces of the wiping material are composed of nanofiber layers, it is possible to remove nano-sized fine dust.

  Moreover, according to the ultra-low dust generation wiping material of the present invention, since both surfaces of the flexible base material are covered with the nanofiber layer, generation of lint from both surfaces of the flexible base material is prevented. It becomes possible. In addition, since the nanofiber layer has a smaller amount of lint generated from the surface than the flexible base material, it is possible to reduce lint generated from both surfaces of the wiping material.

  Moreover, according to the ultra-low dust generation wiping material of the present invention, since the end surface of the ultra-low dust generation wiping material is treated to be dust-free, the flexible substrate, the first nanofiber layer, and the second nanofiber layer The end face of is not exposed to the outside. For this reason, it becomes possible to suppress generation | occurrence | production of the lint from the end surface of a wiping off material.

  Therefore, the ultra-low dust generation wiping material of the present invention can remove nano-sized minute dust and can suppress the occurrence of lint from the wiping material itself. It becomes.

In addition, although the generation | occurrence | production of the lint from the wiping material itself can be reduced to some extent by carrying out the intensive washing | cleaning of the conventional ultra-low dust generation wiping material, there exists a problem that a load is applied with respect to the wiping material. For this reason, in the conventional ultra-low dust wiping material, the material and thickness of the wiping material must be determined in consideration of the load caused by the intensive cleaning, and the degree of freedom in designing the wiping material is low.
On the other hand, according to the ultra-low dust generation wiping material of the present invention, as described above, it is possible to suppress the occurrence of lint from the wiping material itself without performing intensive cleaning, and therefore, for reinforced cleaning. The material and thickness of the wiping material can be determined relatively freely without considering the resulting load, and the wiping material can be designed with a relatively high degree of freedom.

  In this specification, “dust-free treatment” means a treatment for suppressing the occurrence of lint from the end surfaces of the flexible substrate, the first nanofiber layer, and the second nanofiber layer. As will be described later, a melting treatment, a coating treatment with a resin, and the like can be exemplified.

The ultra-low dust generation wiping material of the present invention is particularly effective when the material of the flexible base material is a fiber material.
A flexible substrate made of a fiber material (eg, non-woven fabric, woven fabric, knitted fabric, paper) is more flexible than a flexible substrate made of a material other than the fiber material (eg, film). Lint tends to occur from the surface of the surface. Thus, even if the flexible substrate is made of a fiber material, according to the ultra-low dust generation wiping material of the present invention, both surfaces of the flexible substrate made of the fiber material are made of nanofiber layers. Since it is covered, generation of lint from both surfaces of the flexible substrate can be prevented. Moreover, since the amount of lint generated from the surface of the nanofiber layer is smaller than that of a flexible substrate made of a fiber material, it is possible to reduce lint generated from both surfaces of the wiping material. .

(2) In the ultra-low dust generation wiping material of the present invention, the end surface of the ultra-low dust generation wiping material is preferably melt-treated.

(3) In the ultra-low dust generation wiping material of the present invention, the end surface of the ultra-low dust generation wiping material is preferably coated with a resin.

  By comprising in this way, the end surface of a flexible base material, a 1st nanofiber layer, and a 2nd nanofiber layer will not be exposed outside, and generation | occurrence | production of the lint from the end surface of a wiping material is suppressed effectively. It becomes possible to do.

(4) In the ultra-low dust wiping material of the present invention, the first nanofiber layer and the second nanofiber layer are preferably formed by an electrospinning method.

  The electrospinning method can reduce the average diameter of the nanofibers and can increase the specific surface area of the first nanofiber layer and the second nanofiber layer compared to other methods (for example, melt spinning method). . For this reason, it becomes a wiping material excellent in adsorptivity. In addition, the electrospinning method can be widely used when changing the materials used as nanofibers or when changing the average diameter of nanofibers, and can reduce the initial investment. It becomes a wiping material.

(5) In the ultra-low dust generation wiping material of the present invention, the first nanofiber layer and the second nanofiber layer are made of nanofibers having an average diameter of 50 nm to 800 nm and have pores of 50 nm to 1000 nm. It is preferable to have a size.

  By configuring in this way, it is possible to effectively remove nano-sized fine dust, and it is possible to suppress the release of fine dust taken into the nanofiber layer to the outside again. It becomes.

(6) In the ultra-low dust generation wiping material of the present invention, the first nanofiber layer and the second nanofiber layer preferably have a thickness of 0.1 μm to 500 μm.

  By constituting in this way, it becomes possible to surely prevent the occurrence of lint from both surfaces of the flexible base material, and it becomes an ultra-low dust generation wiping material having a sufficient wiping effect.

(7) In the ultra-low dust generation wiping material of the present invention, it is preferable that the width of the portion of the end face of the ultra-low dust generation wiping material that has been subjected to the dust-free treatment is 0.1 μm to 5000 μm.

When the width of the part where the dust-removing treatment is performed on the end face of the ultra-low dust generation wiping material is less than 0.1 μm, the part subjected to the dust-removing treatment may break when using the ultra-low dust generation wiping material. It may be chipped, and it may be difficult to suppress the occurrence of lint from the end face of the wiping material.
On the other hand, if the width of the part subjected to the dust removal treatment on the end face of the ultra-low dust generation wiping material exceeds 5000 μm, the part subjected to the dust removal treatment may tear, and the lint from the end face of the wiping material may be broken. It may be difficult to suppress the occurrence. In addition, there is a possibility that the wiping performance may vary due to a surface difference (surface difference) between an unmelted portion and a molten portion in the wiping material.
From such a viewpoint, the width of the part subjected to the dust-free treatment on the end face of the ultra-low dust wiping material is preferably 0.5 μm to 1000 μm, more preferably 1 μm to 200 μm, and more preferably 2 μm to 2 μm. More preferably, it is 50 μm.

(8) In the ultra-low dust generation wiping material of the present invention, the ultra-low dust generation wiping material is preferably a clean room wiping material.

In a room with a controlled environment such as a clean room, in addition to being able to remove nano-sized fine dust, it is required that the lint from the wiping material itself be less generated.
According to the ultra-low dust generation wiping material of the present invention, as described above, it is possible to remove nano-sized fine dust and to suppress the occurrence of lint from the wiping material itself. Therefore, it is suitable for use in a clean room.

(9) The manufacturing method of the ultra-low dust generation wiping material of the present invention includes a flexible substrate preparation step of preparing a flexible substrate, and a first nanofiber on one surface of the flexible substrate. A first nanofiber layer forming step of forming a layer, a second nanofiber layer forming step of forming a second nanofiber layer on the other surface of the flexible substrate, the flexible substrate, And a dust-free treatment step of dust-treating the end surfaces of the first nanofiber layer and the second nanofiber layer.

  For this reason, according to the manufacturing method of the ultra-low dust generation wiping material of this invention, while forming a nanofiber layer on both surfaces of a flexible base material, a flexible base material, a 1st nanofiber layer, and a 2nd Because the end face of the nanofiber layer is treated to be dust-free, it is possible to remove nano-sized fine dust and to suppress the occurrence of lint from the wiping material itself. A dust wiping material can be manufactured.

The method for producing an ultra-low dust wiping material of the present invention is particularly effective when a flexible substrate made of a fiber material is used as the flexible substrate.
A flexible substrate made of a fiber material (eg, non-woven fabric, woven fabric, knitted fabric, paper) is more flexible than a flexible substrate made of a material other than the fiber material (eg, film). Lint tends to occur from the surface of the surface. Thus, even when a flexible base material made of a fiber material is used, both surfaces of the flexible base material made of a fiber material can be obtained according to the method for producing an ultra-low dust generation wiping material of the present invention. Is covered with the nanofiber layer, it is possible to prevent the occurrence of lint from both surfaces of the flexible substrate. In addition, since the amount of lint generated from the surface of the nanofiber layer is smaller than that of a flexible substrate made of a fiber material, the lint generated from both surfaces of the wiping material can be reduced more than before. A low dusting wiping material can be produced.

(10) In the manufacturing method of the ultra-low dust generation wiping material of the present invention, in the dust-free processing step, the flexible substrate, the first nanofiber layer, and the second nanofiber layer are melt-processed. It is preferable.

(11) In the method for producing an ultra-low dust generation wiping material of the present invention, in the dust-free processing step, the flexible substrate, the first nanofiber layer, and the second nanofiber layer are end-resined. It is preferable to coat with.

  The flexible substrate, the first nanofiber layer, and the second nanofiber layer are melt-treated or coated with a resin so that the end surfaces of the flexible substrate, the first nanofiber layer, and the second nanofiber layer are external. It is possible to suppress the occurrence of lint from the end surface of the wiping material.

  In addition, as a melting process, a fusing cut process and a laser cut process can be used suitably, for example.

(12) In the manufacturing method of the ultra-low dust generation wiping material of the present invention, in the first nanofiber layer forming step and the second nanofiber layer forming step, the first nanofiber layer or the first nanofiber layer is formed by electrospinning. It is preferable to form two nanofiber layers.

  The electrospinning method can reduce the average diameter of the nanofibers and increase the specific surface area of the first nanofiber layer and the second nanofiber layer compared to other methods (for example, melt spinning method). it can. For this reason, the wiping material excellent in adsorptivity can be manufactured. In addition, the electrospinning method can be widely used when changing the material used as nanofibers or when changing the average diameter of nanofibers, and the initial investment can be kept low. Can be achieved.

(13) In the manufacturing method of the ultra-low dust generation wiping material of this invention, it is preferable that a said 1st nanofiber layer and a said 2nd nanofiber layer consist of the same material.

  By adopting such a method, it becomes possible to use the same material in the first nanofiber layer forming step and the second nanofiber layer forming step, which facilitates the manufacture of the ultra-low dust wiping material, and the manufacturing cost. It is possible to reduce the cost.

(14) In the method for producing an ultra-low dust wiping material of the present invention, the first nanofiber layer and the second nanofiber layer are preferably made of different materials.

  By setting it as such a method, the ultra-low-dust generation wiping material which has the wiping characteristic which changes with surfaces can be manufactured. For example, it is possible to produce an ultra-low dust generation wiping material in which the minimum size of dust that can be wiped off varies depending on the surface, and an ultra-low dust generation wiping material in which the degree of water absorption or chemical resistance varies depending on the surface.

  Hereinafter, the manufacturing method of the ultra-low dust generation wiping material and the ultra-low dust generation wiping material of the present invention will be described based on the embodiments shown in the drawings.

[Embodiment]
First, the structure of the ultra-low dust generation wiping material 10 according to the embodiment will be described with reference to FIGS. 1 and 2.

Drawing 1 is a figure shown in order to explain ultra-low dust generation wiping material 10 concerning an embodiment. FIG. 1A is a view schematically showing a cross section of the ultra-low dust generation wiping material 10, and FIG. 1B is an enlarged top view of the first nanofiber layer 30. In FIG. 1A, the thicknesses of the first nanofiber layer 30 and the second nanofiber layer 40 relative to the flexible substrate 20 and the width of the melted portion 50 are exaggerated.
Drawing 2 is a figure shown in order to explain ultra-low dust generation wiping material 10 concerning an embodiment. 2A is a cross-sectional electron micrograph of the first nanofiber layer 30, and FIG. 2B is a diagram illustrating the first nanofiber layer 30 when dust D is attached to the nanofibers 32 of the first nanofiber layer 30. It is a cross-sectional electron micrograph.

  As shown in FIG. 1, the ultra-low dust generation wiping material 10 according to the embodiment includes a flexible substrate 20, a first nanofiber layer 30 disposed on one surface of the flexible substrate 20, and It is a wiping material for a clean room including the second nanofiber layer 40 disposed on the other surface of the flexible base material 20 and a melting part 50 disposed at an end of the ultra-low dust generation wiping material 10. .

  The flexible base material 20 is a flexible base material layer made of a nonwoven fabric composed of, for example, cellulose fibers and synthetic fibers such as polyolefin and polyester. The thickness of the flexible substrate 20 is, for example, 0.1 mm to 5 mm (1 mm in the embodiment).

  The first nanofiber layer 30 is a nanofiber layer formed on one surface of the flexible substrate 20 by an electrospinning method. The thickness of the first nanofiber layer 30 is, for example, 0.1 μm to 500 μm (in the embodiment, 10 μm).

  The second nanofiber layer 40 is a nanofiber layer formed on the other surface of the flexible substrate 20 by an electrospinning method. The thickness of the second nanofiber layer 40 is, for example, 0.1 μm to 500 μm (in the embodiment, 10 μm).

  The first nanofiber layer 30 and the second nanofiber layer 40 are composed of nanofibers 32 and 42 having an average diameter of 50 nm to 800 nm, and have a pore size of 50 nm to 1000 nm. The nanofibers 32 and 42 can be manufactured from various polymer materials. In this embodiment, it is comprised from the same polymer material.

  The melting part 50 is ultra-low by melting the end surface of the ultra-low dust generation wiping material 10 composed of the flexible base material 20, the first nanofiber layer 30 and the second nanofiber layer 30. It is formed at the end of the dusting wipe 10. In addition, the fusion | melting part 50 becomes a part currently processed dust-free. The width w (see FIG. 1A) of the melting part 50 is, for example, 0.1 μm to 5000 μm (20 μm in the embodiment).

  Next, the manufacturing method of the ultra-low dust generation wiping material which concerns on embodiment is demonstrated using FIG.3 and FIG.4.

Drawing 3 is a flow chart shown in order to explain the manufacturing method of the ultra-low dust generation wiping material concerning an embodiment.
Drawing 4 is a figure shown in order to explain the manufacturing method of the ultra-low dust generation wiping material concerning an embodiment. FIG. 4A to FIG. 4E are diagrams schematically showing each step.

  As shown in FIG. 3, the manufacturing method of the ultra-low dust generation wiping material according to the embodiment includes a flexible base material preparation step S10, a first nanofiber layer formation step S20, and a second nanofiber layer formation step S30. And melting processing step S40 in this order.

1. Flexible substrate preparation step S10
First, as shown to Fig.4 (a), the flexible base material 20 is prepared.

2. First nanofiber layer forming step S20
Next, as shown in FIG. 4B, the first nanofiber layer 30 is formed on one surface of the flexible substrate 20 by electrospinning.

3. Second nanofiber layer forming step S30
Next, as shown in FIG.4 (c), the 2nd nanofiber layer 40 is formed on the other surface in the flexible base material 20 by the electrospinning method.

4). Melting process S40
Then, as shown in FIG. 4D, the flexible base material 20, the first nanofiber layer 30, and the second nanofiber layer 40 are subjected to fusing cut processing. Thereby, the end surface of the flexible base material 20, the 1st nanofiber layer 30, and the 2nd nanofiber layer 40 can be made dust-free.

  By performing the above steps, the ultra-low dust generation wiping material 10 according to the embodiment can be manufactured (see FIG. 4E).

  As described above, according to the ultra-low dust generation wiping material 10 according to the embodiment, both surfaces of the ultra-low dust generation wiping material 10 are composed of the first nanofiber layer 30 and the second nanofiber layer 40. As shown in b), it is possible to remove nano-sized minute dust D.

  Moreover, according to the ultra-low dust generation wiping material 10 according to the embodiment, both surfaces of the flexible base material 20 made of the fiber material are covered with the first nanofiber layer 30 and the second nanofiber layer 40. It is possible to prevent the occurrence of lint from both surfaces of the flexible substrate 20. In addition, since the first nanofiber layer 30 and the second nanofiber layer 40 have a smaller amount of lint generated from the surface than the flexible base material 20 made of a fiber material, both of the ultra-low dust generation wiping materials 10 are used. It is possible to reduce lint generated from the surface as compared with the prior art.

  In addition, according to the ultra-low dust generation wiping material 10 according to the embodiment, the end surface of the ultra-low dust generation wiping material 10 has been subjected to dust-free processing, and thus the flexible base material 20, the first nanofiber layer 30, and The end surface of the second nanofiber layer 40 is not exposed to the outside. For this reason, generation | occurrence | production of the lint from the end surface of the ultra-low dust generation wiping material 10 can be suppressed.

  Therefore, the ultra-low dust generation wiping material 10 according to the embodiment can remove nano-sized minute dust and can suppress generation of lint from the wiping material itself. It becomes a wiping material.

  Further, according to the ultra-low dust generation wiping material 10 according to the embodiment, since it is possible to suppress the occurrence of lint from the wiping material itself without performing intensive cleaning as described above, it is possible to perform reinforced cleaning. The material and thickness of the wiping material can be determined relatively freely without considering the resulting load, and the wiping material can be designed with a relatively high degree of freedom.

  In the ultra-low dust generation wiping material 10 according to the embodiment, since the end surface of the ultra-low dust generation wiping material 10 is melt-processed, the flexible base material 20, the first nanofiber layer 30, and the second nanofibers. The end face of the layer 40 is not exposed to the outside, and the occurrence of lint from the end face of the ultra low dust wiping material 10 can be effectively suppressed.

  In the ultra-low dust generation wiping material 10 according to the embodiment, since the first nanofiber layer 30 and the second nanofiber layer 40 are formed by an electrospinning method, other methods (such as a melt spinning method) are used. In comparison, the average diameter of the nanofibers can be reduced, and the specific surface areas of the first nanofiber layer 30 and the second nanofiber layer 40 can be increased. For this reason, it becomes a wiping material excellent in adsorptivity. In addition, the electrospinning method can be widely used when changing the materials used as nanofibers or when changing the average diameter of nanofibers, and can reduce the initial investment. It becomes a wiping material.

  In the ultra-low dust generation wiping material 10 according to the embodiment, the first nanofiber layer 30 and the second nanofiber layer 40 are composed of nanofibers 32 and 42 having an average diameter of 50 nm to 800 nm, and 50 nm to 1000 nm. Since it has a pore size, it becomes possible to effectively remove nano-sized fine dust, and the fine dust taken into the first nanofiber layer 30 and the second nanofiber layer 40 is released to the outside again. It can be suppressed.

  In the ultra-low dust generation wiping material 10 according to the embodiment, since the thicknesses of the first nanofiber layer 30 and the second nanofiber layer 40 are 0.1 μm to 500 μm, both surfaces of the flexible substrate 20 It is possible to reliably prevent the occurrence of lint from the above, and an ultra-low dust wiping material having a sufficient wiping effect.

  In the ultra-low dust generation wiping material 10 according to the embodiment, the width w of the melted portion 50 (portion subjected to dust-free processing) on the end surface of the ultra-low dust generation wiping material 10 is 0.1 μm or more. When the ultra-low dust generation wiping material 10 is used, the melting part 50 can be prevented from cracking or chipping. Moreover, since the width w of the melted part 50 (the part subjected to the dust-free treatment) is 5000 μm or less, the melted part 50 can be prevented from tearing, and from the end face of the ultra-low dust generation wiping material 10. It becomes possible to suppress the occurrence of lint, and to prevent the wiping performance from varying.

  As described above, the ultra-low dust generation wiping material 10 according to the embodiment can remove minute nano-sized dust and can suppress the generation of lint from the wiping material itself. Therefore, it is suitable for use in a clean room.

  According to the manufacturing method of the ultra-low dust generation wiping material according to the embodiment, as described above, the first nanofiber layer 30 and the second nanofiber layer 40 are formed on both surfaces of the flexible base material 20 made of a fiber material. In addition to the formation, the end surfaces of the flexible substrate 20, the first nanofiber layer 30, and the second nanofiber layer 40 are treated to be dust-free, so it is possible to remove nano-sized minute dust. And the ultra-low dust generation wiping material 10 which can suppress generation | occurrence | production of the lint from the wiping material itself can be manufactured.

  In the manufacturing method of the ultra-low dust generation wiping material according to the embodiment, in the melting treatment step S40, the flexible substrate 20, the first nanofiber layer 30, and the second nanofiber layer 40 are melted (melting cut processing). By doing so, the end surfaces of the flexible base material 20, the first nanofiber layer 30, and the second nanofiber layer 40 are not exposed to the outside, and the occurrence of lint from the end surfaces of the ultra-low dust generation wiping material 10 is prevented. It becomes possible to suppress.

  In the manufacturing method of the ultra-low dust generation wiping material according to the embodiment, in the first nanofiber layer forming step S20 and the second nanofiber layer forming step S30, the first nanofiber layer 30 or the second nanofiber is formed by electrospinning. Since the layer 40 is formed, the average diameter of the nanofibers is reduced as compared with the case where the first nanofiber layer 30 or the second nanofiber layer 40 is formed by another method (for example, melt spinning method or the like). The specific surface areas of the first nanofiber layer 30 and the second nanofiber layer 40 can be increased. For this reason, the wiping material excellent in adsorptivity can be manufactured. In addition, the electrospinning method can be widely used when changing the material used as nanofibers or when changing the average diameter of nanofibers, and the initial investment can be kept low. Can be achieved.

  In the manufacturing method of the ultra-low dust generation wiping material according to the embodiment, the first nanofiber layer 30 and the second nanofiber layer 40 are made of the same material. As a result, since the same material can be used in the first nanofiber layer forming step S20 and the second nanofiber layer forming step S30, the manufacture of the ultra-low dust wiping material 10 becomes easy and the manufacturing cost is reduced. Can be achieved.

  As mentioned above, although the manufacturing method of the ultra-low dust generation wiping material and the ultra-low dust generation wiping material of the present invention has been described based on the above embodiment, the present invention is not limited to this, and departs from the gist thereof. For example, the following modifications are possible.

(1) In the ultra-low dust generation wiping material 10 according to the above embodiment, as the flexible base material, the flexible base material 20 made of a nonwoven fabric composed of cellulose fibers and synthetic fibers such as polyolefin and polyester is used. Although used, the present invention is not limited to this, a non-woven fabric made of other fiber materials may be used, and a flexible substrate other than the non-woven fabric (for example, woven fabric, knitted fabric, paper, sponge) , Film, etc.) may be used.

(2) In the ultra-low dust generation wiping material 10 according to the above embodiment, the case where the first nanofiber layer and the second nanofiber layer are made of the same material has been exemplarily described, but the present invention is limited to this. Instead, the first nanofiber layer and the second nanofiber layer may be made of different materials.

(3) In the manufacturing method of the ultra-low dust generation wiping material according to the above embodiment, the flexible base material 20, the first nanofiber layer 30, and the second nanofiber layer 40 are subjected to fusing cut processing in the melting process step. Although the case has been described by way of example, the present invention is not limited to this, and for example, laser cutting may be performed. Moreover, in the manufacturing method of the ultra-low dust generation wiping material according to the above-described embodiment, the case of performing the melting treatment step as the dust-free treatment step has been exemplarily described, but the present invention is not limited to this. Instead, for example, instead of the melt treatment step, a coating treatment step of coating the end surfaces of the flexible base material 20, the first nanofiber layer 30, and the second nanofiber layer 40 with a resin may be performed.

(4) In the manufacturing method of the ultra-low dust generation wiping material according to the embodiment, the case where the first nanofiber layer 30 and the second nanofiber layer 40 are formed by the electrospinning method has been exemplarily described. The invention is not limited to this, and the first nanofiber layer or the second nanofiber layer may be formed by a method other than electrospinning (for example, melt spinning).

(5) Although the ultra-low dust wiping material according to the above embodiment has been described as a wiping material for a clean room, the present invention is not limited to this and can be used for other purposes as well.

It is a figure shown in order to demonstrate the ultra-low dust generation wiping material 10 which concerns on embodiment. It is a figure shown in order to demonstrate the ultra-low dust generation wiping material 10 which concerns on embodiment. It is a flowchart shown in order to demonstrate the manufacturing method of the ultra-low dust generation wiping material which concerns on embodiment. It is a figure shown in order to demonstrate the manufacturing method of the ultra-low dust generation wiping material which concerns on embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Ultra low dust generation wiping material, 20 ... Flexible base material, 30 ... 1st nanofiber layer, 32,42 ... Nanofiber, 40 ... 2nd nanofiber layer, 50 ... Molten part, D ... Minute garbage

Claims (14)

A flexible substrate;
A first nanofiber layer formed on one surface of the flexible substrate;
An ultra-low dust wiping material comprising a second nanofiber layer formed on the other surface of the flexible substrate,
An ultra-low dust generation wiping material, wherein an end face of the ultra-low dust generation wiping material is treated to be dust-free. In the ultra-low dust generation wiping material according to claim 1,
An end surface of the ultra-low dust generation wiping material is melt-processed, and the ultra-low dust generation wiping material. In the ultra-low dust generation wiping material according to claim 1,
An end surface of the ultra-low dust wiping material is coated with a resin. In the ultra-low dust generation wiping material according to any one of claims 1 to 3,
The ultra-low dust wiping material, wherein the first nanofiber layer and the second nanofiber layer are formed by an electrospinning method. In the ultra-low dust generation wiping material according to any one of claims 1 to 4,
The first nanofiber layer and the second nanofiber layer are made of nanofibers having an average diameter of 50 nm to 800 nm and have a pore size of 50 nm to 1000 nm. In the ultra-low dust generation wiping material according to any one of claims 1 to 5,
The ultra-low dust-generating wiping material, wherein the first nanofiber layer and the second nanofiber layer have a thickness of 0.1 μm to 500 μm. In the ultra-low dust generation wiping material according to any one of claims 1 to 6,
The ultra-low dust generation wiping material is characterized in that the width of the portion of the end face of the ultra-low dust generation wiping material that has been subjected to dust-free treatment is 0.1 μm to 5000 μm. In the ultra-low dust generation wiping material according to any one of claims 1 to 7,
The ultra-low dust generation wiping material is a clean room wiping material. A flexible substrate preparation step of preparing a flexible substrate;
A first nanofiber layer forming step of forming a first nanofiber layer on one surface of the flexible substrate;
A second nanofiber layer forming step of forming a second nanofiber layer on the other surface of the flexible substrate;
A method for producing an ultra-low dust generation wiping material, comprising: a dust-free treatment step of dust-treating end surfaces of the flexible substrate, the first nanofiber layer, and the second nanofiber layer. . In the manufacturing method of the ultra-low dust generation wiping material according to claim 9,
In the dust-free processing step, the flexible substrate, the first nanofiber layer, and the second nanofiber layer are melt-processed, and the method for producing an ultra-low dust wiping material is characterized. In the manufacturing method of the ultra-low dust generation wiping material according to claim 9,
In the dust-free treatment step, the ultra-low dust generation wiping material is manufactured by coating the flexible base material, the first nanofiber layer, and the second nanofiber layer with a resin. Method. In the manufacturing method of the ultra-low dust generation wiping material according to any one of claims 9 to 11,
In the first nanofiber layer forming step and the second nanofiber layer forming step, the first nanofiber layer or the second nanofiber layer is formed by an electrospinning method. A method of manufacturing the material. In the manufacturing method of the ultra-low dust generation wiping material according to any one of claims 9 to 12,
The first nanofiber layer and the second nanofiber layer are made of the same material, and the manufacturing method of the ultra-low dust generation wiping material. In the manufacturing method of the ultra-low dust generation wiping material according to any one of claims 9 to 12,
The first nanofiber layer and the second nanofiber layer are made of different materials.