JP2002123082A - Toner leakage preventing material and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive toner leakage preventing material having good sealing performance in spite of a small width, also having good property of retaining the shape and quality of a toner in a toner tank and ensuring low pulling resistance of a toner sealing film and to provide a method for producing the toner leakage preventing material. SOLUTION: The toner leakage preventing material 15, 15 is stuck to faces 4b, 4b opposite to the body 1a of a toner tank. The toner leakage preventing material 15 has a substrate 16 with a polyethylene foam layer 16a having plural closed cells obtained through an electronic crosslinking step. A polyethylene smooth layer 17 has been integrated with the surface of the polyethylene foam layer 16a by heat fusion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, which is attached to the periphery of a mounting opening of a toner tank used in an electrophotographic copying machine, a laser printer, etc. The present invention relates to a preferable toner leakage preventing material interposed between the housing and a housing and a method of manufacturing the toner leak preventing material.

[0002]

2. Description of the Related Art As a conventional toner leakage preventing material of this kind, there is known a material as shown in FIGS.

In such a printer, a toner tank 1 used in a copying machine, a laser printer, or the like employing an electrophotographic system is provided with a peripheral portion around an opening 1b inside the toner tank body 1a when the toner tank 1 is transported. A transparent or translucent toner sealing film 2 is attached so that the stored toner does not fall off.

[0004] The toner sealing film 2 is folded back by a folded portion 2a substantially at the center, and is also provided by a ring portion 3 integrally provided at one end 2b, as shown by a two-dot chain line in FIG. 4 so that it can be used by being peeled off from the periphery of the opening 1b.

The printer mounting member 4 has a toner opening 4a formed substantially in the center at a substantially rectangular shape, and toner leakage preventing members 5a, 5b on the surfaces 4b, 4b facing the toner tank body 1a. Each is stuck.

Among them, the toner leakage preventing material 5a is shown in FIG.
As shown in FIG.
A double-sided pressure-sensitive adhesive tape layer 7 is attached to the lower surface of the toner container 4 and is attached to a surface 4b of the periphery of the toner opening 4a facing the toner tank body 1a.

[0007] The base material 6 has a so-called open cell that allows a foamed space formed by foaming to communicate with another foamed space.

A smooth layer 9 is adhered to the upper surface of the substrate 6 with an adhesive layer 8 made of a double-sided tape.

The smooth layer 9 is mainly composed of a high-molecular-weight polyethylene material so as to reduce friction when the toner sealing film 2 is pulled out.

Next, the operation of this conventional example will be described.

In the conventional toner tank peripheral structure of the printer constructed as described above, after the toner tank 1 is mounted on the printer, the toner tank main body 1a and the printer mounting port are connected as shown by a two-dot chain line in FIG. From between body 4
By gripping the ring portion 3 and pulling out the toner sealing film 2, the toner sealing film 2 is peeled off from the periphery of the opening 1b and separated.

At this time, the toner leakage preventing material 5 is interposed between the periphery of the opening 1b of the toner tank main body 1a and the printer mounting opening 4 adjacent to the toner tank opening 1b. After pulling out the sealing film 2, sealing is performed so as to fill the gap.

Therefore, the toner in the toner tank main body 1a passes through the opening 1b and the toner opening 4a, and moves and is transferred without leaking toward the printer.

[0014]

However, in such a conventional toner leakage preventing material, the resistance is reduced when the toner sealing film 2 is pulled out by the smooth layer 9 provided on the surface of the base material 6. However, the smooth layer 9
In addition, since expensive high-molecular-weight polyethylene is used, there is a problem that the manufacturing cost is increased.

Further, once the high molecular weight polyethylene material is deformed, it is difficult to return to the original state. For this reason, when it is deformed so as to be turned up as shown in FIG. 7 at the time of pulling out, there is a possibility that the sealing performance may be reduced.

Further, the smooth layer 9 is adhered to the base material 6 made of a polyurethane foam via an adhesive layer 8 using a double-sided tape.

Since the base material 6 has open cells, a part of the adhesive enters into the open cells, and as shown in FIG. 6, the edges 7a, 7a of the double-sided adhesive tape layer 7 are formed. When the toner leakage preventing material 5 is crushed and deformed in the height direction, such as when the toner leakage preventing material 5 is cut into a predetermined shape, there is a possibility that the material will adhere to the gap between the edges 8a and 8a of the adhesive layer 8. Was.

For this reason, if the state in which the edge 7a and the edge 8a remain adhered to each other continues, there is a possibility that the sealing performance may be affected.

Since the base material 6 has open cells, external moisture may enter the toner tank main body 1a from the open cells and impede the fluidity of the toner. . In addition, the charging rate of the moistened toner may change, and the fixing rate to paper may change.

Further, since the base material 6 has open cells, if the width is set to be small, the toner may leak from these open cells to the outside. For this reason, it is necessary to use the toner leakage preventing material 5 having a width equal to or larger than a predetermined width. However, in recent years, there has been a problem that it is difficult to secure a space for attaching the toner leakage preventing material 5 with the downsizing of the printer device and the copying device.

That is, in a portion where the developing roller is rotatably supported with the toner leak preventing material interposed in the housing, an elastic foam made of polyurethane foam is used as the toner leak preventing material. When used, the toner leakage preventing material having a predetermined width or more must be used.

Therefore, the present invention provides a semiconductor device having a small width,
Provided are an inexpensive toner leakage preventive material having good sealing properties, good toner character retention in a toner tank, a low resistance to pulling out a toner sealing film, and a method of manufacturing the toner leak preventive material. The challenge is to do.

[0023]

According to the first aspect of the present invention, an elastically deformable base material is provided between at least two members to contact the two members. , Wherein the base material is a toner leakage prevention material having a polyethylene foam layer made of a polyethylene foam.

[0024] In the first aspect of the present invention, since the base material has a polyethylene foam layer made of polyethylene foam, the base material has a structure that is smaller than a conventional base material made of polyurethane foam. And it is excellent in dimensional stability.

For this reason, even if the dimensional tolerance in the pressing direction is set to a small value, the sealing property is not impaired and the width of the base material can be set to a small value. In addition, it is possible to contribute to miniaturization of the whole printer device and the like.

According to the second aspect of the present invention, the toner tank is provided on the periphery of the opening of the toner tank and is elastically deformable by being interposed between the periphery and another member adjacent to the opening of the toner tank. In a toner leakage prevention material that seals by contacting a suitable base material, the base material is characterized by a toner leakage prevention material having a polyethylene foam layer made of a polyethylene foam.

According to the second aspect of the present invention, since the base material of the toner leakage preventing material has a polyethylene foam layer made of a polyethylene foam, it is made of a conventional polyurethane foam. Dimensional stability is superior to that of base materials.

For this reason, even if the dimensional tolerance in the pressing direction is set to be small, it is possible to set the width of the base material to be small without deteriorating the sealing property. In addition, it is possible to contribute to miniaturization of the whole printer device and the like.

Further, according to the third aspect of the present invention, the elastically deformable base material is provided between the end of the roller member rotatably supported in the housing and the housing. In the toner leakage preventing material which seals by being brought into contact with an end portion and the housing, the base material is characterized by a toner leakage preventing material having a polyethylene foam layer made of a polyethylene foam.

According to the third aspect of the present invention, the base material interposed between the end of the roller member and the housing is constituted by a polyethylene foam layer made of polyethylene foam. It is excellent in dimensional stability as compared with a substrate composed of a conventional polyurethane foam.

For this reason, even if the dimensional tolerance in the pressing direction is set to be small, the width of the base material can be set to be small without deteriorating the sealing property. In addition, it is possible to contribute to miniaturization of the whole printer device and the like.

According to a fourth aspect of the present invention, there is provided the toner leakage preventing material according to any one of the first to third aspects, wherein a polyethylene smooth layer is integrally provided on the surface of the polyethylene foam layer. .

[0033] According to the above-described structure of the fourth aspect, the polyethylene smooth layer integrally provided on the surface of the polyethylene foam layer may be used, for example, when the toner sealing film is pulled out or at the end of the roller member. The friction is reduced when, for example, turns.

Therefore, the pull-out resistance or the rotation resistance of the toner sealing film is reduced, and the polyethylene foam layer is set to be thin in the height direction. Since it has dimensional stability, it returns to its original shape.
Therefore, desired sealing properties can be exhibited.

Further, since the polyethylene foam layer is made of substantially the same material as the polyethylene smooth layer, it has a high affinity and can be heat-welded without using an adhesive, for example.

For this reason, there is no risk of adhesion to the adhesive layer on the other side even if it is crushed and deformed in the height direction as in the prior art.

Further, there is no need to form a smooth layer using an expensive high molecular weight polyethylene material. For this reason, the manufacturing cost can be reduced, and a separately prepared double-sided tape for bonding the smooth layer of the high-molecular-weight polyethylene material is also unnecessary, and the number of parts and the number of steps are reduced, and the manufacturing cost is also reduced in this respect. Can be suppressed.

According to the fifth aspect,
5. The toner leakage prevention material according to claim 1, wherein the polyethylene foam layer has closed cells obtained by performing an electron crosslinking step.

[0039] In the apparatus according to the fifth aspect, the polyethylene foam layer has a closed cell obtained by performing an electron cross-linking step, so that the adhesive material extends to the inside of the base material. There is no danger of the toner entering, and the danger of the toner leaking through the inside of the base material is reduced.

For this reason, for example, even if the base material has a small width, the sealing property can be improved, and in this regard, the efficiency of the attaching space can be improved, and the printer device and the like can be used. Can contribute to the miniaturization of the whole.

Further, since external moisture does not enter the toner tank main body, there is no possibility that the fluidity of the toner is hindered as in the prior art. Further, since the possibility that the toner particles are moistened is reduced, the charging rate is stabilized, and the fixing rate to paper is always maintained in a good state.

Further, in the sixth aspect of the present invention, there is provided the toner leakage preventing material according to the fourth or fifth aspect, wherein silicon is applied to a surface of the polyethylene smooth layer.

According to the sixth aspect of the present invention, the silicon applied to the surface of the smooth polyethylene layer further reduces the resistance when the toner sealing film is pulled out.

According to a seventh aspect of the present invention, there is provided a method for producing a toner leakage preventing material according to any one of the first to sixth aspects, wherein a polyethylene smooth layer is heat-welded to the surface of the polyethylene foam layer so as to be integrated. Features.

According to the above-mentioned structure of the seventh aspect, since a polyethylene smooth layer is heat-welded to the surface of the polyethylene foam layer so as to be integrated, the number of parts such as an adhesive or a double-sided tape and the number of steps are reduced. The number can be reduced to provide an inexpensive toner leakage prevention material.

[0046]

Embodiment 1 Hereinafter, a specific embodiment 1 of the present invention will be described with reference to the drawings. Parts that are the same or equivalent to those in the conventional example will be described with the same reference numerals.

FIGS. 1 and 2 show Embodiment 1 of the present invention.
And a method for producing the toner leakage preventing material.

First, the structure will be described. The toner leakage preventing material according to the first embodiment is provided at the periphery of an opening 1b of a toner tank 1 used in a copying machine, a laser printer or the like employing an electrophotographic system. When transporting tank 1,
A transparent or translucent toner sealing film 2 is attached so that the toner stored in the toner tank main body 1a does not spill.

The toner sealing film 2 is folded back by a substantially folded portion 2a at the center, and a ring portion 3 integrally provided at one end 2b as shown by a two-dot chain line in FIG. 4 so that it can be used by being peeled off from the periphery of the opening 1b.

The printer mounting member 4 has a toner opening 4a formed substantially in the center at a substantially rectangular shape, and toner leakage preventing members 15, 15 on the surfaces 4b, 4b facing the toner tank main body 1a. Each is stuck.

As shown in FIG. 2, the toner leakage preventing material 15 has a double-sided adhesive tape layer 7 attached to the lower surface side of a base material 16 having a polyethylene foam layer 16a made of polyethylene foam. ing.

A release paper 18 is attached to the lower surface of the double-sided adhesive tape layer 7. Then, the release paper 18 is peeled off from the double-sided adhesive tape layer 7 so as to be adhered to the surface 4b of the periphery of the toner opening 4a facing the toner tank body 1a.

The polyethylene foam layer 16a has a plurality of closed cells obtained by performing an electron crosslinking step. That is, the polyethylene foam layer 16a formed by closed cells
The single closed cell space is configured to be discontinuous with other closed cell spaces.

On the surface of the polyethylene foam layer 16a, a polyethylene smooth layer 17 is provided so as to be integral therewith. In the first embodiment, the polyethylene smooth layer 17 is heat-welded so as to be integrated with the surface of the polyethylene foam layer 16a by a heat-welding step.

Further, in the first embodiment, silicon 19 is applied to the surface of the polyethylene smooth layer 17, and further, the friction with the toner sealing film 2 is reduced.

Next, the operation of the first embodiment will be described.

In the first embodiment, after the toner tank 1 is mounted on a printer device or the like, the ring portion 3 is gripped, and as shown by a two-dot chain line in FIG. When the toner sealing film 2 is pulled out from the space between the opening 1 and the toner tank main body 1a.
From the peripheral edge b, the toner sealing film 2 is peeled off, and the printer can be used.

In this state, the toner leakage preventing material 15
Polyethylene smooth layer 17 coated with silicone 19
However, sealing is performed such that toner particles are not spilled due to the elastic force of the polyethylene foam layer 16a in contact with the periphery of the opening 1b.

The base material 16 of the toner leakage preventing material 15 is
Polyethylene foam layer 16a made of polyethylene foam
Therefore, the dimensional stability is superior to that of the conventional base material 6 made of the polyurethane foam.

For this reason, even if the dimensional tolerance in the pressing direction is set small, the sealing performance is not impaired. Therefore,
The dimension in the height direction can be set smaller in the base 16 of the first embodiment than in the conventional base 6. Therefore, by reducing the pressing margin of the printer mounting body 4,
By effectively using the limited space, it is possible to contribute to downsizing of the printer device and the like as a whole.

The polyethylene smooth layer 17 provided integrally on the surface of the polyethylene foam layer 16a reduces friction when the toner sealing film 2 is pulled out. Further, in the first embodiment, the silicon 19 applied to the surface of the polyethylene smoothing layer 17 reduces the resistance when the toner sealing film 2 is pulled out.

For this reason, the pull-out resistance of the toner sealing film 2 is reduced, and the polyethylene smooth layer 17 is likely to be curled up as shown in FIG. However, since the polyethylene foam layer 16a has dimensional stability, it returns to its original shape due to elastic force.

Therefore, the polyethylene smoothing layer 17
The desired sealing property can be exerted by deforming and adapting according to the shape of the peripheral edge of the opening 1b and abutting on substantially the entire surface.

Further, the polyethylene foam layer 16a
Since it is made of substantially the same material as the polyethylene smooth layer 17, it has a high affinity and can be heat-welded without using an adhesive, for example.

For this reason, there is no fear that the crushing deformation in the height direction as in the related art will cause the adhesive layer to adhere to the adhesive layer on the other side as shown in FIG.

Further, there is no need to form a smooth layer using an expensive high molecular weight polyethylene material. For this reason, the manufacturing cost can be reduced, and a double-sided tape for bonding the smooth layer of the high-molecular-weight polyethylene material, which has been separately prepared, is no longer necessary, and the number of parts and the number of steps are reduced. An increase in manufacturing cost can be suppressed.

The polyethylene foam layer 16a
However, since it has closed cells obtained by performing the electron cross-linking process, there is no danger of the adhesive entering the inside of the base material 16 and the toner leaks outside through the inside of the base material 16. The risk of occurrence is also reduced.

For this reason, for example, even if the base material 16 has a small width, it is possible to improve the sealing property. Etc. can contribute to the miniaturization of the whole.

Further, when the external moisture is
Since it does not penetrate into the inside, there is no possibility that the fluidity of the toner is hindered unlike the related art. Therefore, good fluidity can be obtained even if the toner particles are further reduced to fine particles. Further, since the possibility that the toner particles are moistened is reduced, the charging rate is stabilized, and the fixing rate to paper is always maintained in a good state.

Further, since the polyethylene smooth layer 17 is heat-welded so as to be integral with the surface of the polyethylene foam layer 16a, the number of parts and the number of steps such as an adhesive material or a double-sided tape are reduced, and an inexpensive toner is obtained. A leak prevention material can be provided.

[0071]

Second Embodiment FIG. 3 illustrates a toner leakage preventing member according to a second embodiment of the present invention.

The same or equivalent parts as those in the first embodiment will be described with the same reference numerals.

The toner leakage preventing member 25 according to the second embodiment
Is in a developing device housing 20 as a housing.
A developing roller 21 as a roller member is supported so as to be rotatable.

Both ends 21a, 21 of the developing roller 21
a between the developing device housing 20 and the developing device housing 20, the bearing portions 20a, 20a of the developing device housing 20 are adhered and interposed between the end portions 21a, 21a and the developing device housing 20. A toner leakage prevention member 25 is provided.

The toner leakage preventing material 25 is made of the base material 2
6 is constituted by a polyethylene foam layer 26a made of a polyethylene foam.

The polyethylene foam layer 26a has a plurality of closed cells obtained by performing an electron crosslinking step.
That is, the polyethylene foam layer 26 formed by closed cells
The closed cell space inside a is configured to be discontinuous with other closed cell spaces.

Next, the operation of the second embodiment will be described.

In the second embodiment, the base material 26 interposed between the both ends 21a of the developing roller 21 and the developing device housing 20 is constituted by a polyethylene foam layer 26a made of polyethylene foam. Therefore, it is excellent in dimensional stability as compared with a substrate composed of a conventional polyurethane foam.

For this reason, both ends 2 of the developing roller 21
Even if the dimensional tolerance in the direction of pressing against 1a and 21a is set small, leakage of the toner from the developing surface 21b to the outside of the developing device housing 20 is prevented without deteriorating the sealing performance.

Further, since the width of the base material 26 can be set to be small, it can be used for a limited attaching space and contribute to the miniaturization of the whole printer device and the like.

Further, in the second embodiment, since the polyethylene foam layer 26a has closed cells obtained by performing the electron crosslinking step, the toner enters the inside of the There is no danger of leaking through the interior of the device.

For this reason, for example, even if the base material has a small width, the sealing property can be improved, and in this respect, the laminating space efficiency can be improved, and the printer device and the like can be used. Can contribute to the miniaturization of the whole.

Further, since external moisture does not enter the direction of the developing surface 21b of the developing roller 21, there is no possibility that the fluidity of the toner is hindered as in the prior art. Further, since the possibility that the toner particles are moistened is reduced, the charging rate is stabilized, and the fixing rate to paper is always maintained in a good state.

Further, a polyethylene smooth layer can be easily provided integrally with substantially the same material on the surface of the polyethylene foam layer 26a constituting the base material 26.

Therefore, the frictional resistance generated when the developing roller unit 21 rotates can be reduced, and
The polyethylene smooth layer integrally formed of substantially the same material on the surface of the polyethylene foam layer 26a is hardly peeled off and has good durability.

Although the first and second embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the first and second embodiments, and the design is within a range not departing from the gist of the present invention. Modifications are included in the present invention.

For example, in the first and second embodiments, the printer device to which the toner leakage preventing material of the present invention is applied has been described. However, the present invention is not limited to such a printer device and the like. If it is a toner leakage prevention material used for a photosensitive device, an intermediate transfer device, a transfer separation device, a transport device, a charging device, a developing device, and a copying machine adopting an electrophotographic system, the shape, quantity, application The location is not particularly limited.

Further, in the first embodiment, the base material 1
Although the double-sided pressure-sensitive adhesive tape layer 7 is used for the bonding of 6, the adhesive layer is not particularly limited thereto. For example, even if the adhesive layer is formed by a double-sided pressure-sensitive adhesive tape having at least a part of an adhesive. Alternatively, an adhesive may be applied or attached at the time of adhesion.

In the second embodiment, the developing roller 21 rotatably supported by the developing housing 20 has been described as the roller member. However, the present invention is not limited to this. The shape, quantity, toner holding form, and material are not limited as long as they are rotatably supported with respect to the housing, such as a developing sleeve or the like. The toner leakage preventing members 5, 15, 2
Of course, 5 may be attached to any member.

Further, the polyethylene foam of the polyethylene foam layers 16a and 26a constituting the bases 16 and 26 does not have to be made of a polyethylene material alone. For example, other polyethylene-based resin is mixed. It may be something.

[0091]

As described above, according to the first aspect of the present invention, since the substrate has a polyethylene foam layer made of a polyethylene foam,
Compared to conventional polyurethane foam base materials,
Excellent dimensional stability.

For this reason, even if the dimensional tolerance in the pressing direction is set to be small, it is possible to set the width of the base material to be narrow without deteriorating the sealing property. In addition, it is possible to contribute to miniaturization of the whole printer device and the like.

According to the second aspect of the present invention, since the base material of the toner leakage preventing material has a polyethylene foam layer made of a polyethylene foam, a base made of a conventional polyurethane foam is used. Excellent dimensional stability compared to materials.

For this reason, even if the dimensional tolerance in the pressing direction is set to be small, it is possible to set the width of the base material to be small without deteriorating the sealing property. In addition, it is possible to contribute to miniaturization of the whole printer device and the like.

Further, according to the third aspect of the present invention, the base material interposed between the end of the roller member and the housing is constituted by a polyethylene foam layer made of polyethylene foam. Dimensional stability is superior to a substrate composed of a polyurethane foam.

For this reason, even if the dimensional tolerance in the pressing direction is set to be small, it is possible to set the width of the base material to be small without deteriorating the sealing property. In addition, it is possible to contribute to miniaturization of the whole printer device and the like.

According to the fourth aspect of the present invention, the smooth polyethylene layer integrally provided on the surface of the foamed polyethylene layer is used, for example, when the toner sealing film is pulled out or when the end of the roller member rotates. When moving, reduce friction.

For this reason, the pull-out resistance or rotation resistance of the toner sealing film is reduced, and the polyethylene foam layer is set to be thin in the height direction so that the polyethylene foam layer is deformed even if the polyethylene foam layer is going to be deformed. Since it has dimensional stability, it returns to its original shape.
Therefore, desired sealing properties can be exhibited.

Further, since the polyethylene foam layer is made of substantially the same material as the polyethylene smooth layer, it has a high affinity and can be heat-welded without using, for example, an adhesive.

Therefore, there is no possibility that the adhesive layer is adhered to the adhesive layer on the other side even if it is crushed and deformed in the height direction unlike the related art.

Further, there is no need to form a smooth layer using an expensive high molecular weight polyethylene material. For this reason, the manufacturing cost can be reduced, and a separately prepared double-sided tape for bonding the smooth layer of the high-molecular-weight polyethylene material is also unnecessary, and the number of parts and the number of steps are reduced, and the manufacturing cost is also reduced in this respect. Can be suppressed.

And, according to the fifth aspect,
Since the polyethylene foam layer has closed cells obtained by performing an electron cross-linking step, there is no possibility that the adhesive may enter the inside of the substrate, and the toner may leak through the inside of the substrate. The risk of occurrence is also reduced.

For this reason, for example, even if the substrate has a narrow width, the sealing property can be improved, and in this respect, the laminating space efficiency can be improved, and the printer device and the like can be used. Can contribute to the miniaturization of the whole.

Further, since external moisture does not enter the toner tank main body, there is no possibility that the fluidity of the toner is hindered as in the related art. Further, since the possibility that the toner particles are moistened is reduced, the charging rate is stabilized, and the fixing rate to paper is always maintained in a good state.

Further, according to the present invention, the silicone applied to the surface of the polyethylene smooth layer comprises:
Further, the resistance at the time of pulling out the toner sealing film is reduced.

According to the seventh aspect of the present invention, since the polyethylene smooth layer is heat-welded to the surface of the polyethylene foam layer so as to be integrated, the number of components and the number of steps such as an adhesive or a double-sided tape are reduced. It is possible to provide an inexpensive toner leakage prevention material by reducing the amount, which is useful in practical use.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a configuration of a toner tank using a toner leakage prevention material according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a toner leakage prevention member according to the first embodiment and corresponding to a position along line AA in FIG. 1;

FIG. 3 is an exploded perspective view illustrating a configuration of a developing device using the toner leakage preventing material according to the second embodiment.

FIG. 4 is an exploded perspective view illustrating a configuration of a toner tank using a conventional toner leakage prevention material.

FIG. 5 is a cross-sectional view of a conventional toner leakage preventing material, corresponding to a position along line BB in FIG. 4;

FIG. 6 is a conceptual diagram illustrating a state in which the edges of the upper and lower adhesive layers adhere to each other with the conventional toner leakage prevention material.

FIG. 7 is a conceptual diagram illustrating a smooth layer turning when a toner sealing film is pulled out with a conventional toner leakage preventing material.

[Explanation of symbols]

 15, 25 Toner leakage preventing material 16, 26 Base material 16a, 26a Polyethylene foam layer 17 Polyethylene smooth layer 19 Silicon

Claims (7)

[Claims] 1. A toner leakage prevention material which seals by contacting an elastically deformable base material between at least two members and contacting the two members, wherein the base material is a polyethylene foam layer made of a polyethylene foam. A toner leakage preventing material, comprising: 2. An image forming apparatus, comprising:
In the toner leakage prevention material for sealing by contacting an elastically deformable base material interposed between the peripheral edge and another member adjacent to the toner tank opening, the base material is made of polyethylene foam A toner leakage preventing material having a polyethylene foam layer made of a body. 3. An elastically deformable base material interposed between an end of a roller member rotatably supported in a housing and the housing and brought into contact with the end and the housing. A toner leakage prevention material that seals by doing so, wherein the base material has a polyethylene foam layer made of polyethylene foam. 4. The toner leakage preventing material according to claim 1, wherein a polyethylene smooth layer is integrally provided on the surface of the polyethylene foam layer. 5. The toner leakage preventing material according to claim 1, wherein the polyethylene foam layer has closed cells obtained by performing an electron crosslinking step. 6. The surface of the smooth polyethylene layer is coated with silicon.
The toner leakage preventing material according to the above. 7. A method for producing a toner leakage preventing material according to claim 1, wherein a polyethylene smooth layer is heat-welded to the surface of said polyethylene foam layer so as to be integrated.