JP4035115B2 - Pile sheet material for preventing toner leakage - Google Patents

Description

  The present invention is applied to both ends of a photosensitive drum, a housing, and a developing roller in an electrophotographic image forming process such as an electrophotographic copying machine, a laser beam printer, a facsimile machine, and a word processor to prevent leakage of toner particles. The present invention relates to a pile sheet material used for scraping off adhering toner. The present invention also relates to a pile-like sheet material used for preventing toner leakage in a toner supply shutter portion of a toner cartridge.

  As shown in FIG. 6, an electrophotographic image forming process such as an electrophotographic copier or a laser beam printer is now integrated with the photosensitive drum 1 and other base material as a cartridge so as to be detachable. A method of performing maintenance by the user himself is common. This method is widely used because of its good operability. In this process cartridge, waste toner generated by the cleaning mechanism is discharged into the cleaning container and discarded at the same time when the cartridge is replaced.

  The cleaning mechanism scrapes residual toner from the surface of the photosensitive drum after primary transfer. In this cleaning mechanism, the sealing material is attached to both ends of the cleaning blade and the opening of the cleaning container so as to face the photosensitive drum, thereby preventing residual toner from leaking out from both sides of the container. Such a cleaning mechanism is widely implemented in ordinary process cartridges.

  In the electrophotographic image forming process, the periphery of the photosensitive drum 1 and the developing roller 2 (see FIG. 8) is usually 180 to 200 ° C., and temporarily reaches 220 to 230 ° C. when the apparatus is activated. For this reason, it is common to use a felt of tetrafluoroethylene fiber (PTFE fiber) excellent in slidability and heat resistance as a sealing material in the vicinity of the photosensitive drum and the developing roller. In addition, since these sealing materials require smooth rotation and high adhesion, a two-layer structure of a felt layer that contacts a photosensitive drum and a cushion layer that imparts elasticity is advantageous. For this, urethane foam and wool felt are used.

Known examples of sealing materials for preventing toner leakage include JP-A-61-129664, JP-A-4-134374, and registered utility model No. 2537613. PTFE fiber felt includes needle punch felt, flocked sheet or A smoothing felt can be exemplified. This PTFE fiber is considerably thicker in order to develop a high sealing property if it is a simple felt. However, in recent years, the finer toner particles have become finer and the appearance of polymerized toner particles and the like has led to an increase in PTFE fiber felt. Even if the thickness is increased, it is impossible to develop a sufficient sealing property. For this reason, it has been proposed to apply a pile-like fiber sealing material as disclosed in JP-A-2003-223447.
JP 61-129664 A JP-A-4-134374 Registered Utility Model No. 2537613 Japanese Patent Laid-Open No. 2003-223447

  The pile fiber sealing material in Japanese Patent Application Laid-Open No. 2003-223447 has a long moquette pile length of 3 mm, so that the PTFE fiber felt can be used without attaching urethane foam or wool felt to the back surface. Compared with high cushioning properties, it provides sufficient sealing performance. This sealing material solves the problem that PTFE fiber felt cannot be removed by simply smoothing the surface with a high heat press by weaving pile yarn into two layers of warp and weft yarns to prevent hair loss. ing.

  On the other hand, since this pile-like fiber seal material combines two layers of warp and weft, it is necessary to feed four ground warps and two wefts simultaneously to the loom. In addition, it is very expensive as a custom-made machine, and the amount of yarn used is doubled, resulting in an increase in manufacturing cost. Further, even if the pile yarn basis weight is fully packed with a full gauge, voids remain at the base of the pile yarn after the raising treatment, and therefore it is inevitable that some toner fine particles leak out from this portion.

  The present invention has been proposed in order to improve the above-mentioned problems related to conventional pile fiber seal materials and PTFE fiber felts, and uses a normal pile woven knitted fabric that can be knitted by a general-purpose loom or knitting machine. An object of the present invention is to provide an inexpensive pile-like sheet material capable of almost completely preventing leakage of toner fine particles and polymerized toner particles in recent years. Another object of the present invention is to provide a pile-like sheet material with less fiber hair loss that is likely to cause various troubles.

  The pile sheet material according to the present invention is used for preventing leakage of toner particles from a photosensitive drum and a developing roller in an electrophotographic image forming process. This pile-shaped sheet material includes a pile woven / knitted layer that is brushed with a cut pile, a lower felt layer mainly composed of relatively thin synthetic fibers, and a felt layer formed by needle punching from the back side of the felt layer. And a large number of rush fibers that have entered the base of the raised pile yarn. In this sheet material, toner particles are prevented from leaking out from the pile woven or knitted layer by densely filling a large number of rush fibers in the gaps at the base of the raised pile yarn.

  The pile-like sheet material of the present invention is a pile woven or knitted layer that has been brushed with a cut pile, a lower felt layer mainly composed of relatively thin synthetic fibers, and a sheet material for fixing the sheet material in place. The adhesive layer may be included. In this sheet material, the pile length of the pile woven or knitted layer is preferably 1 to 7 mm, and the fineness of the rush fiber entering the pile woven or knitted layer from the felt layer is preferably 0.1 to 3.0 denier. The sheet material can be subjected to fluororesin processing on the surface of the pile knitted layer by spraying or coating.

  The present invention will be described with reference to the drawings. FIG. 1 illustrates a pile woven or knitted fabric 5 used for the pile-like sheet material 3 (FIG. 4) of the present invention. In the pile knitted fabric 5, pile yarn is generally woven or knitted into the ground yarn structure 4. Examples of the pile knitted fabric 5 include a plush woven velvet woven fabric such as moquette and telemp, a tufted carpet fabric, a Wilton carpet fabric, and a vertical knitted fabric knitted with a double raschel machine. Cuts the tip with a shearing machine to make a cut pile. The pile length of the raised pile yarn 6 (FIG. 2) is preferably 1 to 7 mm, more preferably 2 to 4 mm, and is preferably longer than a normal velvet pile yarn.

  The pile knitted fabric 5 has a large number of cut pile yarns 7, and even if the pile stand is cut and fluffed when pulling out the knife attached to the wire like a plush weave, Brushing may be performed using shearing or a polisher. In the pile knitted knitted fabric 5, even if the basis weight of the raised pile yarn 6 is fully packed with full gauge, a large number of voids 9 remain in the base portion 8 of each pile yarn (see FIG. 2).

  As shown in FIG. 3, on the lower side of the pile knitted fabric 5, a web 10 composed of relatively thin synthetic fibers is polymerized, and when both are integrated by vertical needle punching 11 from the back side of the web, Inrush fibers 12 entering from the web are formed to obtain a pile-like sheet material 3 shown in FIG. In many cases, relatively inexpensive polyester fibers are used for the web 10, and part of the bristles (collected recycled cotton) may be used. In addition to polyester, the web 10 may be blended with synthetic fibers such as aromatic polyamide, acrylic, nylon, and polypropylene, natural fibers such as wool and cotton, and chemical fibers such as rayon and acetate. The fineness of the web 10 is generally quite small, for example 0.5 to 3.0 denier.

  The web 10 may be a split fiber. In this case, it is preferable that the fineness after split is 0.1 to 0.5 denier. The split fibers are split along a predetermined longitudinal line by mechanical action such as needle punching 11 or the like, heating action, or chemical treatment with a solvent to be 8, 16, or 24. For example, when a 16-split type fiber made of polyamide / polyester is used as the split fiber, the fineness per one is 0.1 to 0.5 denier. Therefore, in the obtained sheet material 3 (FIG. 4), the fineness of the rush fiber 12 entering the pile woven / knitted layer 14 from the felt layer 16 is 0.1 to 3.0 denier, and if it exceeds 3.0 denier, the sheet There is a possibility that the flexibility of the material 3 may be hindered.

  This split fiber is composed of at least two or more incompatible fiber-forming resins. For example, the split fiber includes a two-component system in which one resin has a low melting point and the other resin has a high melting point. When heat or pressure is applied to the split fibers, at least one component in the thermoplastic resin having two or more components is softened and melted. Examples of the combination of the low melting point resin and the high melting point resin include polyolefin / polyamide, polyolefin / polyester, polyamide / polyester, and any combination other than this combination can be adopted.

In FIG. 3, needle punching is performed from the lower web 10 to the pile knitted fabric 5, and a large number of fibers 12 (FIG. 4) are pushed from the web 10 into the base 8 of the raised pile yarn 6 by this needle punching 11. Therefore, the web 10 needs to have a certain thickness and density, and preferably has a thickness of about 0.8 to 4.0 mm and a basis weight of about 200 to 800 g / m ² . This needle punching is a process of inserting a large number of needles from the back surface to the surface of the web 10, and the fibers of the web 10 that are hooked on the needles protrude to the surface of the web 10 to form the base of the raised pile yarn 6. 8 enters the gap 9.

The needle for needle punching has a fork-type needle (not shown) having a fork-shaped needle tip and a barb like a stab at the tip so that the fiber of the web 10 can be hooked at the needle tip and protruded to the front side. It is preferable to use a crown type needle (not shown). In addition, a regular needle having a barb like a stab may be used as this needle. In this case, the fibers 10 of the web 10 are more entangled with each other than protruding to the front side. There is a tendency that the inrush fibers 12 are reduced. For this reason, in this needle punching, it is rare to use only a fork type or crown type needle, and it is common to perform punching by mixing a regular type needle alone or a fork type needle and a regular type needle. For example, when punching is performed with a fork type or crown type needle at a depth of 1 to 10 mm and a punch density of 400 to 1000 / cm ² , rush fibers 12 having a height of 1 to 10 mm can be formed on one surface.

  As shown in FIG. 4, the obtained pile sheet material 3 is composed of a pile woven knitted layer 14 and a lower felt layer 16, and the rush fibers 12 from the felt layer are raised pilings of the pile woven knitted layer 14. The gap in the base of the yarn is closely packed. The sheet material 3 passes through a normal temperature roll press after heating (not shown) or a roll press heated to 100 to 180 ° C., so that the raised pile yarn of the pile woven / knitted layer 14 is laid in one direction, and the oblique pile layer 17 (FIG. 5) can be formed to obtain the bevel pile sheet material 18.

If desired, the surface of the pile woven or knitted layer 14 may be subjected to fluororesin processing by commonly used means such as spraying or coating. The fluororesin used for the resin processing is an aqueous dispersion having a PTFE particle size of 0.10 to 0.35 μm and a concentration of about 60% by weight, and is usually stabilized by adding a nonionic surfactant. This fluororesin is not only PTFE resin but also fluororubber having lubricity and non-adhesiveness, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and tetrafluoroethylene-hexafluoropropylene copolymer (FEP). A resin such as The coating amount of the fluorine resin is 5 to 200 g / ^{m 2,} preferably 10 to 50 g / ^{m 2.}

  The pile sheet material 3 or 18 can be attached to an appropriate portion in the electrophotographic image forming process by further providing an adhesive layer 19 on the lower surface of the felt layer 16. As the adhesive layer 19, a double-sided adhesive tape may be used, or an adhesive may be applied by a usual method such as spraying. Further, when an adhesive sheet (not shown) for fixing the two is interposed between the pile knitted fabric 5 and the lower web 10, the fibers of the raised pile yarn are more firmly fixed by the adhesive sheet. It is preferable because the hair loss of the fiber is further reduced. This adhesive sheet is, for example, a heat-sealing sheet, and is a non-woven fabric or resin sheet of a single or copolymer polymer such as polyamide or polypropylene. As this adhesive sheet, a double-sided pressure-sensitive adhesive tape can also be used, and the double-sided pressure-sensitive adhesive tape can prevent fiber from being removed by pressure bonding.

  The pile sheet materials 3 and 18 as shown in FIG. 4 or 5 can be applied to a part of the process cartridge 20 that is detachably accommodated in the laser beam printer, as illustrated in FIGS. 6 and 7. The cartridge 20 is for a four-color full-color printer (not shown), for example, and the photosensitive drum 1, the charging roller 22, and the cleaning mechanism 24 are integrated by a frame. When the cartridge 20 is stored horizontally from the side of the printer, an exposure mechanism that irradiates a laser beam to form an electrostatic latent image on the drum surface above the cartridge, and a transfer that primarily transfers the developed toner image below the cartridge. The mechanism is located. Further, in front of the cartridge, four developing units that individually store four color toners are rotated, and a developing mechanism for forming a toner image according to the electrostatic latent image is positioned.

  In this printer, the photosensitive drum 1 is rotated counterclockwise, and the drum sequentially and uniformly charges the drum surface in accordance with the rotation, the exposure mechanism, the developing mechanism, the transfer mechanism, and the transfer mechanism. It is close to the cleaning mechanism 24 that removes the remaining toner later. In the cartridge 20, a drum shutter 25 (FIG. 6) that protects the drum surface from external light and contact is attached to the photosensitive drum 1. On the other hand, the cleaning mechanism 24 temporarily transfers the toner image formed on the drum surface by the developing mechanism, and then removes the toner remaining on the drum surface and accumulates it in the internal cleaning container 26.

  The cleaning mechanism 24 opposes the photosensitive drum 1 to the opening 30 of the cleaning container 26, and installs a cleaning blade 32 made of urethane rubber or the like at the edge of the opening so that the edge of the blade is attached to the photosensitive drum 1. After the primary transfer, the residual toner is scraped off from the surface of the photosensitive drum, and sent to the inside of the cleaning container 26 by the scooping sheet 28. In the cleaning mechanism 24, pile-shaped sheet materials 3 and 3 are attached to both ends of the cleaning blade 32 and the edge of the opening 30 in accordance with the shape of the cleaning blade 32, and the seal material contacts both ends of the surface of the photosensitive drum 1.

  The pile-like sheet materials 3 and 18 according to the present invention are attached to both ends of the opening 30 of the cleaning blade 32 and the cleaning container 26 to prevent the collected residual toner from leaking out from both sides of the container opening 30. The cleaning mechanism 24 is excellent in toner removal capability due to the presence of the pile-like sheet materials 3 and 3, and can be widely applied to the process cartridge 20.

  The pile-like sheet materials 3 and 18 of the present invention can also be applied to a toner cartridge 33 for a monochrome copying machine as shown in FIG. In the cartridge 33, arc-shaped notches 34 are formed on both lower side walls thereof, and the developing roller 2 is rotatably installed in the notches, and the toner 36 is accommodated in the cartridge. Both end portions of the developing roller 2 extend to the notch portions 34 on both side walls, and are attached to the notch portions 34 via the pile-like sheet material 3 so as to be rotatable. Above the toner supply port 38, the charging blade 40 is held while being pressed against the surface of the developing roller 2.

  The developing roller 2 is a cylindrical body made of aluminum, and rotates with a thin layer of toner attached to the surface thereof. The developing roller 2 is disposed opposite to the photosensitive drum 42 of the copying machine. When the photosensitive drum 42 rotates in the direction of the arrow and the developing roller 2 rotates in the counterclockwise direction, toner is applied to the surface of the developing roller 2 according to the strength of the electric field formed by the charge of the latent image on the drum surface. And is developed by being attached to the charged portion of the drum surface. The pile-like sheet material 3 effectively prevents the toner adhering to the developing roller 2 in the cartridge 33 from leaking outside the side wall.

  The pile-like sheet materials 3 and 18 of the present invention are also preferably used as a toner cartridge sealing material for preventing toner leakage in a toner supply shutter portion of the toner cartridge. In this application, slidability of the pile surface may be required. In this case, a fiber having good slidability such as nylon or a fluororesin fiber can be used as the pile yarn.

  The pile-like sheet material according to the present invention is formed from the sheet material by densely closing the voids remaining at the base of the raised pile yarn, with a large number of entering fibers entering the pile woven / knitted layer from the lower felt layer. Sufficient prevention of toner fine particles and polymerized toner particles from leaking out. The pile-like sheet material of the present invention has a long piled pile yarn of the pile knitted layer, and a felt layer having a high cushioning property exists on the lower side. Therefore, not only ordinary PTFE fiber felt but also known pile-like fiber seals are used. Higher cushioning and better sealing performance than materials.

  In the pile-like sheet material of the present invention, the raised pile yarn of the pile woven / knitted layer and the numerous indented fibers of the lower felt layer are entangled with each other, so that the raised pile yarn is less likely to cause various troubles. Become. In general, pile-shaped knitted and knitted fabrics of PTFE fibers are prone to hair removal, and this hair removal cannot be avoided by simply smoothing the surface with a high-heat press, whereas the pile-like sheet material of the present invention has manufacturing troubles due to hair removal fibers There is almost no image defect, and it is possible to eliminate electrophotographic image defects even after product assembly.

  The pile-like sheet material of the present invention can be manufactured at low cost because it uses only a felt composed of relatively thin synthetic fibers in addition to a popular pile knitted fabric such as plush weave. With this sheet material, pile woven and knitted fabrics may be popular products, and the amount of yarn used is normal, so it is possible to reduce costs, and the electronic copying machines and laser beam printers that are built-in main bodies are in a severe economic situation. Therefore, it is possible to respond flexibly to the sluggish sales price.

  Next, the present invention will be described based on examples, but the present invention is not limited to the examples.

As the pile knitted fabric 5, a plush weave which is a moquette having a pile length of 3 mm is used, and when a knife attached to a wire is pulled out by a loom, the pile stand is cut and fluff is raised. As shown in FIG. 3, a web 10 made of 100% polyester having a fineness of 2 denier is polymerized on the lower side of the pile knitted fabric 5, and the web has a thickness of 2 mm and a basis weight of 400 g / m ² .

The pile knitted fabric 5 is needle punched from the lower web 10 and the needle punching 11 causes a large number of fibers 12 to enter the base 8 of the raised pile yarn 6 and entangle with the pile yarn. In this needle punching, fork type or crown type needles are used, the punch density is 600 / cm ² , and the average height of the rush fibers is about 2 mm. Next, it is heat-treated at about 200 ° C. through a heating furnace, and the raised pile yarn 17 is laid in one direction by a roll press at room temperature to form the inclined pile layer 17 (FIG. 5). obtain. In the obtained inclined hair pile sheet material 18, a double-sided pressure-sensitive adhesive tape is bonded to the lower surface of the felt layer 16 as the pressure-sensitive adhesive layer 19.

  As shown in FIGS. 6 and 7, the inclined pile sheet material 18 manufactured in the first embodiment is applied to a part of a process cartridge 20 that is detachably accommodated in a laser beam printer. In the cartridge 20, the cleaning mechanism 24 temporarily transfers the toner image formed on the drum surface by a developing mechanism (not shown), then removes the toner remaining on the drum surface and accumulates it in the internal cleaning container 26. .

  The slanted pile sheet materials 18 and 18 have a slanted pile layer 17 having a pile length of 3 mm, and are attached to both ends of the cleaning blade 32 and the opening 30 of the cleaning container 26 by the lower adhesive layer 19. The collected residual toner is prevented from leaking out from both sides of the container opening 30. The cleaning mechanism 24 allows the cleaning blade 32 and the container opening 30 to be lightly adhered to the drum surface due to the presence of the inclined hair pile layer 17 in the pile-like sheet material 18 on both side ends.

  In addition, since the inclined hair pile layer 17 is in contact with the surface of the photosensitive drum 1 and the pile length is as thick as 3 mm, the sealing performance at both ends is high, and the pile yarn of the pile layer 17 is laid down so that the friction resistance is also reduced. small. Therefore, the cleaning mechanism 24 to which the slanted pile-like sheet material 18 is attached has excellent toner removal capability and high durability, and therefore can be widely applied to the process cartridge 20.

For the plush pile knitted fabric 5 obtained in Example 1, as the web 10, 2 denier 16 split type fibers (trade name: Tylillin, Nanya Plastic) made of polyamide / polyester were used. Polymerize from the side. The web 10 is made of 100% 16-split type fiber, has a thickness of 2 mm, and a basis weight of 400 g / m ² .

Needle punching is performed on the pile knitted fabric 5 from the lower web 10, and the needle punching 11 causes a large number of fibers 12 to enter the base 8 of the raised pile yarn 6 from the web 10. In this needle punching, a fork type or crown type needle is used and the punch density is 600 lines / cm ² . Next, it is heat-treated at about 200 ° C. through a heating furnace, and the raised pile yarn 17 is laid in one direction by a roll press at room temperature to form the inclined pile layer 17 (FIG. 5). obtain.

  The split fibers of the web 10 are split into 16 pieces along a predetermined longitudinal line by needle punching 11 and heat treatment, and the fineness per one is 0.15 denier. In the obtained inclined pile sheet material 18, a double-sided pressure-sensitive adhesive tape is further bonded to the lower surface of the felt layer 16 as an adhesive layer 19.

  As shown in FIG. 8, the oblique pile sheet material 18 is applied to a toner cartridge 33 for a monochrome copying machine. In the cartridge 33, the adhesive layer 19 of the inclined pile-like sheet material 18 is attached along the arc-shaped cutouts 34 formed on both lower side walls. When both end portions of the developing roller 2 are fitted into the notch portions 34, the both end portions come into contact with the plush hair pile layer 17 having a pile length of 3 mm and can be installed rotatably.

  When the photosensitive drum 42 of the copying machine rotates in the direction of the arrow and the developing roller 2 rotates in the counterclockwise direction, the toner separates from the surface of the developing roller 2 and adheres to the charged portion of the drum surface for development. . At this time, the slanted pile-like sheet material 18 at both ends can be in close contact with the surface of the developing roller 2 due to the presence of the long piled long slanted hair pile, and the toner attached to the developing roller 2 by the slanted hair pile layer 17. Effectively prevents leakage to the outside of the side wall.

  A warp knitted fabric knitted with a double raschel machine is used as the pile knitted fabric 5, and the double structure of the warp knitted fabric is center-cut with a knife. When the obtained single-sided knitted fabric is brushed with a brushing machine and then raised with a shearing and polisher, the pile length of the raised pile yarn 6 is 3 mm. On the lower side of the pile knitted fabric 5, the same web 10 as in Example 1 is polymerized and needle punched from the lower web 10.

In this needle punching, a needle machine in which a fork type or crown type needle and a regular type needle are mixed is used, and the punch density is 600 / cm ² . Next, when a double-sided pressure-sensitive adhesive tape is bonded to the lower surface of the felt layer 16 as the pressure-sensitive adhesive layer 19, the pile-shaped sheet material 3 is obtained.

Comparative Example 1
In Example 1, an inclined pile sheet material was manufactured using only a pile knitted fabric without using a felt layer. However, prevention of toner leakage from the container opening 30 was insufficient.

Comparative Example 2
In Example 1, an inclined pile sheet material was manufactured using only a felt layer without using a pile knitted fabric. However, the toner removal ability and slidability were insufficient, and the toner from the container opening 30 was further removed. Leakage prevention was insufficient.

Comparative Example 3
In Example 1, a pile pile sheet material was produced in the same manner as in Example 1 except that the pile knitted fabric 5 and the web 10 were bonded with an adhesive without using needle punching. Insufficient prevention of toner leakage.

It is a schematic sectional drawing which expands and shows the pile-shaped woven / knitted fabric used by this invention. It is a schematic sectional drawing which shows the pile-shaped woven or knitted fabric of the raised state. It is a schematic explanatory drawing which shows the state which superpose | polymerizes and integrates a pile-shaped knitted fabric and a web in a cross section. It is a schematic sectional drawing which shows the pile-shaped sheet material which concerns on this invention. It is a schematic sectional drawing which shows the slanting pile-shaped sheet material which the raising pile yarn fell on. It is a schematic sectional drawing of the process cartridge which is one example of application of a pile-shaped sheet material. FIG. 7 is a schematic front view of a state where a photosensitive drum is removed from the cartridge of FIG. 6. It is a schematic sectional drawing of the toner cartridge which is another example of application of a pile-shaped sheet material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photosensitive drum 2 Developing roller 3 Pile-like sheet material 5 Pile-like woven or knitted fabric 6 Raised pile yarn 8 Pile yarn base 10 Web 14 Pile knitted layer 16 Felt layer 19 Adhesive layer

Claims (8)

  A pile-like sheet material used to prevent leakage of toner particles from the photosensitive drum and developing roller in the electrophotographic image forming process. It mainly consists of a pile woven and knitted layer with a cut pile raised and a relatively thin synthetic fiber. And a plurality of piercing fibers that have entered the base of the raised pile yarn from the felt layer by needle punching from the back side of the felt layer. A pile-shaped sheet material that prevents toner fine particles from leaking out from a pile woven or knitted layer by being closely packed in a gap in a base portion.   A pile-like sheet material used to prevent leakage of toner particles from the photosensitive drum and developing roller in the electrophotographic image forming process. It mainly consists of a pile woven and knitted layer with a cut pile raised and a relatively thin synthetic fiber. A lower felt layer configured as follows, and an adhesive layer for fixing the sheet material at a predetermined position, and a plurality of plunging fibers enter the base of the raised pile yarn from the felt layer, and these plunging fibers Is a pile-like sheet material that prevents toner fine particles from leaking out of the pile woven or knitted layer by being closely packed in the gaps at the base of the raised pile yarn.   The pile-shaped sheet material according to claim 1 or 2, wherein the fibers constituting the felt layer are split fibers.   The pile sheet material according to claim 1 or 2, wherein a pile length of the pile woven or knitted layer is 1 to 7 mm.   The pile-like sheet material according to claim 1 or 2, wherein the fineness of the rushed fibers entering the pile woven or knitted layer from the felt layer is mainly 0.1 to 3.0 denier.   The pile sheet material according to claim 1 or 2, wherein the surface of the pile woven or knitted layer is subjected to fluororesin processing.   A toner seal material for an electrophotographic formation process using the pile sheet material according to claim 1. A sealing material for a toner cartridge, comprising the pile-shaped sheet material according to claim 1.

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