JP2022059161A - Powder sealing material - Google Patents

Abstract

To provide a powder sealing material capable of suppressing leakage of powder to the outside.SOLUTION: A powder sealing material comprises: a base fabric obtained by weaving a plurality of warp yarns and a plurality of weft yarns extending in mutually crossing directions; and slide contact parts arranged so that the pile yarns adjacent to each other in the weft direction among a plurality of pile yarns interwoven into the weft yarns and napped on the base fabric are arranged alternately in the warp direction so as to be in a zigzag relationship and form a pair of pile rows, and thus the pair of pile rows adjoin mutually in the weft direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a powder sealing material.

A base cloth formed from a knitted cloth obtained by warp knitting a ground yarn and attached to a support facing a moving body in contact with fine powder particles, and a base cloth raised on the base cloth and sliding on the moving body. A cleaning material for fine powder or granular material is known, which comprises a pile yarn for cleaning the surface of the moving body by scraping off the fine powder or granular material adhering to the surface of the metal (Patent Document 1).

A predetermined gap between the movable body that comes into contact with the fine powder particles and the housing of the movable body is adhered to the movable body or the housing surface to seal the leakage of the powder particles without hindering the movement of the movable body. The main material is a pile fabric that is a sealing material and is composed of a pile yarn that becomes sliding feathers and a base fabric of a plain woven fabric that supports it. It is a synthetic resin fiber with abrasion resistance, the height of the feathers is 1.5 mm or more, the fluff density of the feathers is 40,000 / In ² or more, and the back surface of the base fabric has a coating layer to prevent the feathers from coming off. Further, there is also known a sealing material for preventing leakage of fine powder particles in which the pile yarn is fluffed in a certain direction by heating (Patent Document 2).

Japanese Unexamined Patent Publication No. 2005-141263 Japanese Unexamined Patent Publication No. 2005-37955

An object of the present invention is to provide a powder sealing material capable of suppressing leakage of powder to the outside.

In order to solve the above-mentioned problems, the powder sealing material according to claim 1 is used.
A base cloth obtained by weaving a plurality of warps and wefts extending in directions intersecting each other,
A plurality of pile yarns woven into the warp and weft and raised on the base cloth are alternately arranged along the warp and weft so that the pile yarns adjacent to each other in the warp and weft direction have a staggered relationship. A set of pile rows is formed, and the set of pile rows is provided with a sliding contact portion in which the set of pile rows are arranged adjacent to each other in the warp and weft direction.
It is characterized by that.

The invention according to claim 2 is the powder sealing material according to claim 1.
The warp is not woven into the set of pile rows.
It is characterized by that.

The invention according to claim 3 is the powder sealing material according to claim 1 or 2.
A plurality of warp threads are woven between the pair of pile rows adjacent to each other in the warp and weft direction.
It is characterized by that.

The invention according to claim 4 is the powder sealing material according to any one of claims 1 to 3.
The warp and weft has a fineness of 500 denier or less.
It is characterized by that.

The invention according to claim 5 is the powder sealing material according to any one of claims 1 to 4.
The pile yarn is a synthetic resin fiber having a single yarn fineness of 3 to 8 denier and a fineness of 150 denier or more and 500 denier or less and having a low coefficient of friction and wear resistance.
It is characterized by that.

The invention according to claim 6 is the powder sealing material according to any one of claims 1 to 5.
The pile yarn is fluffed in a direction parallel to the warp.
It is characterized by that.

According to the first aspect of the present invention, it is possible to suppress leakage of the powder to the outside as compared with the case where the present structure is not provided.

According to the second aspect of the present invention, the gap in the direction intersecting the weft at the root of the pile yarn can be reduced as compared with the case where the present configuration is not provided.

According to the third aspect of the present invention, it is possible to increase the voids between the pile rows and reduce the heat storage at the root of the pile yarn as compared with the case where the present configuration is not provided.

According to the fourth aspect of the present invention, the pile yarn can be easily fluffed as compared with the case where the present configuration is not provided.

According to the fifth aspect of the present invention, the yarn density per unit can be increased as compared with the case where the present configuration is not provided.

According to the sixth aspect of the present invention, it is possible to suppress the invasion of the powder into the sliding contact portion as compared with the case where the present configuration is not provided.

It is a simplified perspective view which shows the woven composition of the base cloth of a powder sealing material, and the standing state of each pile on the base cloth. (A) is an enlarged sectional schematic view of the powder sealing material, and (b) is a simplified plan view showing the woven structure of the base cloth of the powder sealing material and the arrangement state of each pile on the base cloth. (A) is an enlarged cross-sectional schematic diagram of the powder sealing material that has been fluffed, and (b) is a schematic diagram illustrating the process of fluffing with a heat roller. (A) is a schematic diagram illustrating the arrangement of pile rows and toner intrusion in the powder sealing material according to the present embodiment, and (b) is a schematic diagram illustrating the arrangement of pile rows and toner intrusion in the powder sealing material of the comparative example. It is a schematic diagram. (A) is a schematic cross-sectional view of a developing device of an image forming apparatus that forms an image using toner, and (b) is a schematic diagram illustrating a powder sealing function of a powder sealing material. (A) is an enlarged cross-sectional photograph of the powder sealing material of Example 1, (b) is an enlarged cross-sectional photograph of the powder sealing material of Example 2, and (c) is an enlarged cross-sectional photograph of the powder sealing material of Comparative Example. be. It is a figure which shows the evaluation result of the size of the gap of the pile thread root in an Example. It is a simplified perspective view which shows the woven composition of the base cloth of the powder sealing material which concerns on a comparative example, and the standing state of each pile on the base cloth. (A) is an enlarged sectional schematic view of the powder sealing material according to the comparative example, and (b) is a simplified plane showing the woven structure of the base cloth of the powder sealing material according to the comparative example and the arrangement state of each pile on the base cloth. It is a figure.

Next, with reference to the drawings, embodiments and specific examples will be given below to explain the present invention in more detail, but the present invention is not limited to these embodiments and specific examples.
In addition, in the explanation using the following drawings, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one, which is necessary for the explanation for easy understanding. Illustrations other than the members are omitted as appropriate.

(1) Structure of powder sealing material FIG. 1 is a simplified perspective view showing the woven structure of the base cloth of the powder sealing material and the standing state of each pile on the base cloth, and FIG. 2 (a) is an enlargement of the powder sealing material. Schematic cross-sectional view, (b) is a simplified plan view showing the woven structure of the base cloth of the powder sealing material and the arrangement state of each pile on the base cloth, and FIG. 3 (a) is an enlargement of the fluffed powder sealing material. The schematic cross-sectional view, (b) is a schematic diagram illustrating the process of hair-cutting by a heat roller.
Hereinafter, the configuration and function of the powder seal member 1 according to the present embodiment will be described with reference to the drawings.

(1.1) Overall Configuration of Powder Sealing Material As shown in FIG. 1, the powder sealing material 1 includes a base cloth 10 made of a woven cloth and having a rectangular shape in a plan view, and a plurality of pile threads 21 on the base cloth 10. It is provided with a sliding contact portion 20 erected on the base cloth 10 woven so as to form a substantially U shape.

As shown in FIG. 2A, a coating layer 13 composed of a synthetic resin coating agent is provided on the back surface of the base cloth 10, and the coating layer 13 is used to attach the root of each pile 21 and the base cloth 10. Is firmly joined. A sticking layer 30 is provided on the back surface of the coating layer 13, and the sticking layer 30 allows the powder sealing material 1 to be stuck to, for example, an image forming apparatus that uses powder.

(1.2) Base cloth The base cloth 10 is a woven cloth obtained by weaving a plurality of warp threads 11 and weft threads extending in directions intersecting each other.
Durable and highly flexible yarns are used for the warp 11 and the weft 12, and examples of such yarns include filament yarns and spun yarns.
The fibers forming the warp 11 and the weft 12 include synthetic fibers made of polyethylene, polypropylene, polyamide, aramid resin, polyester, nylon, acrylic resin, polyethylene terephthalate (PET), semi-synthetic fibers made of rayon, cotton and the like. Natural fiber and the like.

The form of the warp 11 and the weft 12 is not particularly limited, but in the present embodiment, the warp 11 has a thickness of 235T (decitex) / 48F (filament) (235dtex in all 48 multifilaments) as an example. A polyethylene terephthalate (PET) multifilament yarn formed so as to be used is used.

Further, as shown in FIG. 2B, the warp 11 is composed of a plurality of pile yarns 21 woven into the weft 12 and erected side by side along the warp 11 direction (direction A in FIG. 2). The pile rows 22 and the pile rows 23 are not arranged between the pile rows 22 and the pile rows 23 which are erected so that the pile threads 21 have a staggered relationship with each other, and the pile rows 22 and the pile rows 23 are a set. A plurality of piles are woven as a set between the pile rows 24 that have become. In this embodiment, two pieces are woven as a set.
As a result, the pile row 22 and the pile row 23 are adjacent to each other in the weft 12 direction as compared with the powder sealing material 1A of the comparative example in which the warp 11 is arranged between the pile row 22 and the pile row 23, which will be described later, and the pile row. A gap is less likely to occur between the 22 and the pile row 23. In particular, the gap in the direction intersecting the weft 12 at the base of the pile yarn 21 can be further reduced.

Further, in the present embodiment, the thin warp 11 having a thickness of 235T / 48F is not woven between the pile row 22 and the pile row 23, and the pile row 22 and the pile row 23 are combined into a pair of pile rows 24. By weaving a plurality of yarns between the piles as a set, the warp density of the base cloth 10 becomes higher and the gap between the pile rows 24 is widened as compared with the case where the piles are woven between the pile rows 22 and 23.

The weft 12 uses synthetic fibers having a thickness of 500 denier or less. As an example, a polyethylene terephthalate (PET) spun yarn formed so as to have an English cotton count ST20 / 1 is used. Since the weft 12 uses a thin spun yarn having a thickness of 235T / 48F and a thin warp yarn 11 having a thickness of English cotton count ST20 / 1, the tightening force of the pile yarn 21 becomes weak. As will be described later, the pile yarn 21 is easy to fall down.

(1.3) Sliding contact portion As shown schematically in FIG. 2B, the sliding contact portion 20 is a mutual weft of a plurality of pile yarns 21 woven into the weft yarn 12 and raised on the base cloth 10. A set of pile rows 24 are arranged as pile rows 22 and pile rows 23, respectively, along the warp and weft 12 directions (direction A in FIG. 2) so that the pile yarns 21 adjacent to each other in the 12 directions have a staggered relationship. A set of pile rows 24 are arranged so as to be adjacent to each other in the direction of the warp and weft 12.

As the pile yarn 21, a synthetic resin fiber having a single yarn fineness of 3 to 8 denier and a fineness of 150 denier or more and 500 denier or less and having a low coefficient of friction and wear resistance is used. If the single yarn fineness is finer than 3 denier and the fineness is less than 150 denier, the strength of the pile yarn 21 is insufficient. become.
Examples of synthetic resin fibers having a low friction coefficient and abrasion resistance include polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA). ), Tetrafluoroethylene copolymer (ETFE) and the like.

In the present embodiment, the pile yarn 21 is formed to have a single yarn fineness of 5.6 denier and a fineness of 250T (decitex) / 40F (filament) (250 dtex for all 40 multifilaments). -Hexafluoropropylene copolymer (FEP) multifilament yarn is used to thin a bundle forming a pile row to densely plant hair.

As shown in FIG. 2, the set of pile rows 24 is a pile composed of a plurality of pile yarns 21 woven into the weft yarns 12 and erected side by side along the warp and yarn 11 directions (direction A in FIG. 2). It consists of a pile row 23 and pile rows 23 in which pile yarns 21 are erected in a staggered relationship with respect to the pile row 22 and adjacent to each other with two warp yarns 11 sandwiched in the warp and weft 12 direction. It is arranged like this.

As schematically shown in FIG. 3A, the pile yarn 21 is laid down in a direction parallel to the warp 11 with respect to the base cloth 10 (direction A in FIG. 3A). As shown in FIG. 3B, the fluffing is performed by passing a pile woven fabric, that is, a base fabric 10 having an upright pile yarn 21 shown in FIG. 2A, through a pair of heated heat rollers 50. .. For example, between a groove roller 51 having a large number of grooves 51A having a groove depth of 1 to 3 mm heated to 100 to 150 ° C. and a flat roller 52 heated to 80 to 120 ° C., the pile yarn 21 side. Can be processed into the base cloth 10 in the state of the fluffed pile yarn 21 shown in FIG. 3A by passing the yarn on the groove roller-51 side.

(1.3) Coating layer As the coating layer 13, a rubber-based solvent-type adhesive, a hot-melt type adhesive, an adhesive resin, or the like, in which the cured layer has flexibility, is used. In the present embodiment, the coating layer 13 formed of the water-soluble synthetic resin emulsion is provided.
As the water-soluble synthetic resin emulsion, a coating agent made of an acrylic synthetic resin emulsion or a vinyl acetate synthetic resin emulsion is preferably used from the viewpoint of adhesiveness to the material, versatility, etc., to form the base cloth 10. It is impregnated between the warp and weft 12 to prevent fraying, and the pile yarn 21 and the base cloth 10 are bonded to each other.

The method of applying the coating agent to the base cloth 10 is not particularly limited, and examples thereof include a knife coating method, a roll coating method, and a spray coating method. Then, the coating layer 13 can be formed by heat treatment.

(1.4) Pasting layer The pasting layer 30 is formed of a foam material, imparts elasticity to the powder sealing material 1, and is provided so that the sliding contact layer 20 is sufficiently in contact with the rotating body without any gaps. In particular, the sliding contact layer 20 on which the pile yarn 21 is slanted has a thin overall thickness and the elasticity of the pile yarn 21 is reduced. This is because is easily formed. As the foam material forming the sticking layer 30, it is preferable to use a foam material having elasticity and heat resistance, high durability against deformation (sagging), and made of a material that can be adhered with an adhesive.

In particular, as the foam material, it is preferable to use a foam material having a 25% compressive load value of 0.3 to 3 MPa according to the hardness test A method of JIS K 6400, and a material having a hardness test of 0.5 to 2 MPa. It is more preferable to use. When the compressive load value of the foam material is lower than 0.3 MPa, the sliding contact layer 20 cannot be sufficiently slidably contacted with the rotating body. Further, when the compressive load value is higher than 3 MPa, the sliding contact resistance generated between the rotating body and the sliding contact layer 20 becomes large, and the rotation of the rotating body may be hindered. Examples of such foam materials include foamed resins such as polyurethane, polystyrene and polypropylene, synthetic rubbers such as ethylene-propylene-diene copolymer rubber (EPDM) and chloroprene rubber, and thermoplastics such as natural rubbers, olefins and styrenes. Examples include elastomers.

(2) Action of powder sealing material FIG. 4 (a) is a schematic diagram illustrating the arrangement of pile rows 24 and toner intrusion in the powder sealing material 1 according to the present embodiment, and (b) is a powder seal of a comparative example. A schematic diagram illustrating the arrangement of pile rows and the intrusion of toner in the material 1A, FIG. 5A is a schematic cross-sectional view of a developing device of an image forming apparatus that forms an image using toner, and FIG. 5B is a powder sealing material. FIG. 8 is a schematic view illustrating the powder sealing function of No. 1, and FIG. 8 is a simplified perspective view showing the woven structure of the base cloth of the powder sealing material 1A according to the comparative example and the standing state of each pile on the base cloth, FIG. 9 ( a) is an enlarged schematic cross-sectional view of the powder sealing material 1A according to the comparative example, and (b) is a simplified diagram showing the woven structure of the base cloth of the powder sealing material 1A according to the comparative example and the arrangement state of each pile on the base cloth. It is a plan view.
Hereinafter, the operation of the powder sealing material 1 according to the present embodiment will be described by using a developing device in an image forming device as an example of use.

(2.1) Developing Device The developing device 100 supplies the developing housing 101, the developing roller 102 arranged facing the photoconductor drum 120, and the toner as an example of the powder in the developing housing 101 to the developing roller 102 side. The supply roller 103, the layer regulation blade 104 that regulates the layer thickness of the toner, the toner scattering prevention film 105 attached to the lower edge of the opening provided in the developing housing 101, and the inner edge 1a thereof are the layer regulation blade 104. The main part is composed of the powder sealing material 1 which is abutted against both end portions 104a (see FIG. 5B), the sliding contact portion 20 is in contact with the surface of the developing roller 102, and is attached to the developing housing 101. ..

A layer regulation blade 104, a powder sealing material 1, and a toner scattering prevention film 105 are provided in contact with the developing roller 102 at the opening portion of the developing housing 101 to form a closed space communicating with the developing housing 101, and the developing housing 101 is formed. A toner of any one of yellow (Y), magenta (M), cyan (C), and black (K) is contained therein.
As an example, the developing roller 102 has a cylindrical shape with an outer diameter of about 10 to 20 mm, and the powder sealing material 1 is bent so as to come into contact with a substantially half-circumferential portion of the rotating developing roller 102, so that the developing housing 101 It is pasted on (see FIG. 5 (a)).

(2.2) Action of powder sealant The developing roller 102 conveys the toner supplied by the supply roller 103 and coated with the layer regulation blade 104 to the photoconductor drum 120.
Most of the toner regulated by the layer regulation blade 104 is collected in the developing housing 101 by the supply roller 103, but at both side ends 104a of the layer regulation blade 104, it flows laterally with the rotation of the developing roller 102 for development. Attempts to leak to the outside of the housing 101 (see arrow R in FIG. 5B).
In this state, the pile thread 21 forming the sliding contact portion 20 of the powder sealing material 1 comes into contact with the surface of the rotating developing roller 102 while rubbing against the surface of the rotating developing roller 102, and the toner that flows laterally and tends to leak is a fiber. It collects in between and dams it to prevent leakage of the developing housing 101 to the outside.

As shown in FIGS. 8 and 9, the powder sealing material 1A of the comparative example is a pile row 22 composed of a plurality of pile yarns 21 woven into the weft yarns 12 and erected side by side along the warp yarn 11 direction. And, each pile yarn 21 is erected in a staggered relationship with respect to the pile row 22, and one warp 11 is formed between each pile row 22 and the pile row 23. Have been placed.

As shown schematically in FIG. 9B, the sliding contact portion 20A has a pile row 22 and a pile row 23 standing adjacent to each other so as to have a staggered relationship with each other, and a warp 11 is arranged between them. A gap (indicated by an arrow W in FIG. 9B) is generated between the pile yarns 21. In particular, a gap is likely to occur at the root of the pile yarn 21 shown in FIG. 9 (a). Therefore, as schematically shown in FIG. 4 (b), the toner that flows laterally and tends to leak (indicated by the arrow A in the figure) is developed along the gap between the pile row 22 and the pile row 23. There was a risk of leakage to the outside of the housing 101.

As shown in FIG. 2B, the sliding contact portion 20 of the powder sealing material 1 according to the present embodiment includes a pile row 22 composed of pile yarns 21 erected side by side along the warp yarn 11 direction and a pile. A pile row 24, which is a set of pile rows 23 erected so that each pile yarn 21 has a staggered relationship with the row 22, sandwiches two warp yarns 11 in the weft 12 direction. The pile yarns are arranged so as to be adjacent to each other, and the gaps (indicated by the arrow W in FIG. 2B) that are likely to occur between the pile yarns 21 are smaller than those in the comparative example.
As a result, as schematically shown in FIG. 4A, the pile rows 22 and the pile rows 23 are adjacent to each other and the toner (indicated by the arrow in the figure) that tends to flow laterally and leak out is arranged without a gap. The pile row 24 is dammed to prevent leakage of the developing housing 101 to the outside. In particular, the gaps that are likely to occur at the base of the pile yarn 21 are reduced, and the leakage of toner to the outside of the developing housing 101 is suppressed.

In the sliding contact portion 20 of the powder sealing material 1 according to the present embodiment, the warp 11 is not woven between the pile row 22 and the pile row 23, and the pile row 22 and the pile row 23 are a set of pile rows 24. By weaving two of them as a set, the warp density of the base cloth 10 is higher than that of the powder sealing material 1A of the comparative example, which is woven between the pile rows 22 and 23, and the pile rows 24 are woven. The gap is widening. As a result, the heat storage at the root of the pile yarn 21 generated by the rotation of the developing roller 102 while in contact with the sliding contact portion 20 is reduced.

As shown in FIG. 2A, the pile yarn 21 is laid down in a direction parallel to the warp yarn 11. Further, in the attachment to the developing housing 101, as shown in FIG. 4A, the angle at which such a fluffing direction intersects the rotation axis 102c of the developing roller 102 (see FIG. 5B), for example, 45. By adjusting the degree, the intrusion of the toner (indicated by the arrow in the figure) that flows laterally and tries to leak into the pile row 24 is suppressed.

FIG. 6A is an enlarged cross-sectional photograph of the powder sealing material of Example 1, FIG. 6B is an enlarged cross-sectional photograph of the powder sealing material of Example 2, and FIG. 6C is an enlarged cross-sectional view of the powder sealing material of Comparative Example. Photograph and FIG. 7 is a diagram showing the evaluation result of the size of the gap at the root of the pile thread in the example.
Hereinafter, examples and comparative examples in which the embodiments are further embodied will be described.

(Example 1)
Polyethylene terephthalate (PET) multifilament yarn formed so that the warp 11 has a thickness of 235T (decitex) / 48F (filament), and the weft 12 has an English cotton count ST20 / 1. The base fabric 10 was woven using the spun yarn of polyethylene terephthalate (PET) thus formed.
Then, a tetrafluoroethylene-hexafluoropropylene copolymer formed on the base fabric 10 as a pile yarn 21 with a single yarn fineness of 5.6 d (denier) and a fineness of 500 T (decitex) / 80 F (filament) ( FEP) multifilament yarn was woven.

At this time, as a weaving structure, the pile yarn 21 is a pile row 22 composed of a plurality of pile yarns 21 woven side by side with respect to the warp yarn 12 along the warp 11 direction, and each pile yarn with respect to the pile row 22. The pile row 23 woven so that the 21 is in a staggered relationship is woven as a set of pile rows 24, and the warp 11 is not woven between the pile row 22 and the pile row 23, and the pile row 22 and the pile row are not woven. Two piles were woven as a set between the pile rows 24 in which 23 was a set.
A powder sealing material was formed by applying a coating and a hair-cutting treatment to a base cloth 10 woven with the pile yarn 21 and bonding a foam material as a sticking layer 30, and the material was cut to a predetermined size in Example 1. And said.

(Example 2)
As the pile yarn 21, a tetrafluoroethylene-hexafluoropropylene copolymer (FEP) multifilament yarn formed so as to have a single yarn fineness of 5.6d (denier) and a fineness of 250T (decitex) / 40F (filament) is used. It was the same as in Example 1 except that it was used, and this was designated as Example 2.

(Comparative example)
Formed as pile yarn 21 on a base fabric woven with warp 11 and weft 12 as in Examples 1 and 2 so as to have a single yarn fineness of 5.6d (denier) and a fineness of 500T (decitex) / 80F (filament). The multifilament yarn of the tetrafluoroethylene-hexafluoropropylene copolymer (FEP) was woven.
At this time, as a weaving structure, the pile yarns 21 form a pile row consisting of a plurality of pile yarns 21 woven side by side with respect to the warp yarns 12 along the direction of the warp yarns 11, and the warp yarns 11 are 1 between the pile yarns. Weaved books one by one and used this as a comparative example.

The size of the gap at the root of the pile yarn was evaluated for Examples 1 and 2 and Comparative Example. The evaluation of the gap was performed by measuring the area of each gap with a microscope in a state where the powder sealing material was compressed to a predetermined thickness, and calculating the average value of the areas of all the voids that could be extracted as an image. .. The result of Example 1 is shown in FIG. 6 (a), the result of Example 2 is shown in FIG. 6 (b), and the result of Comparative Example is shown in FIG. 6 (c).
As shown in FIGS. 6 (a) to 6 (c), it was confirmed that in Examples 1 and 2, the gaps at the roots of the pile threads (indicated by circles in the figure) were filled as compared with Comparative Examples. As the evaluation results, as shown in FIG. 7, the average value of the gap area of Example 1 is 2.6 × 10 − ² mm ² , and the average value of the gap area of Example 1 is 1.4 × 10 − ² mm. ^2. The average value of the gap area in the comparative example was 4.7 × 10 ⁻² mm ² .

From the above results, the thin warp yarn having a thickness of 235T / 48F is not woven between the pile rows 22 and the pile rows 23, and 2 between the pile rows 22 and the pile rows 24 in which the pile rows 23 are paired. It was shown that by weaving the books as a set, the gap in the direction intersecting the weft at the root of the pile yarn can be reduced as compared with the comparative example of weaving between the pile rows 22 and 23, respectively.
Further, in Example 2 in which the pile yarn 21 has a yarn count (250T) thinner than that of Example 1, it was shown that the gap in the direction intersecting the weft 12 at the root of the pile yarn can be further reduced.

Although the embodiments according to the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications are made within the scope of the gist of the present invention described in the claims. Is possible. For example, the powder sealing material according to the present embodiment is applied to a powder feed roller such as a packaging machine for packaging fine powder chemicals to prevent the chemicals leaking from the gap between the powder feed roller and the housing. It can be widely used as a powder sealing material to suppress.

1, 1A ... Powder sealant 10 ... Base cloth 11 ... Warp 12 ... Weft 13 ... Coating layer 20, 20A ... Sliding joint 21 ... Pile yarn 22, 23, 24 ... Pile row 30 ... Paste layer 100 ... Development device 101 ... Development housing 102 ... Development roller 103 ... Supply roller 104 ... Layer regulation blade

Claims (6)

A base cloth obtained by weaving a plurality of warps and wefts extending in directions intersecting each other,
A plurality of pile yarns woven into the warp and weft and raised on the base cloth are alternately arranged along the warp and weft so that the pile yarns adjacent to each other in the warp and weft direction have a staggered relationship. A set of pile rows is formed, and the set of pile rows is provided with a sliding contact portion in which the set of pile rows are arranged adjacent to each other in the warp and weft direction.
A powder seal member characterized by this. The warp is not woven into the set of pile rows.
The powder sealing material according to claim 1. A plurality of warp threads are woven between the pair of pile rows adjacent to each other in the warp and weft direction.
The powder sealing material according to claim 1 or 2. The warp and weft has a fineness of 500 denier or less.
The powder sealing material according to any one of claims 1 to 3, wherein the powder sealing material is characterized by the above. The pile yarn is a synthetic resin fiber having a single yarn fineness of 3 to 8 denier and a fineness of 150 denier or more and 500 denier or less and having a low coefficient of friction and wear resistance.
The powder sealing material according to any one of claims 1 to 4, wherein the powder sealing material is characterized by the above. The pile yarn is fluffed in a direction parallel to the warp.
The powder sealing material according to any one of claims 1 to 5, wherein the powder sealing material is characterized by the above.

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