JP2537613Y2 - Toner outflow prevention material for copier - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-leakage material for a copying machine provided at both ends of a roll located at an opening of a toner box of the copying machine so as to enable beautiful copying of prints.

[0002]

2. Description of the Related Art In general, a toner spill-prevention material for a copying machine provided at both ends of a roll located at an opening of a toner box has a good adhesion to the roll and a smooth roll. It is required to have low frictional resistance and elasticity so as to rotate. For this reason, the conventional toner outflow preventing material for a copying machine includes a traction layer located on the toner box side not in contact with the roll and a roll layer.
A structure consisting of a working layer in contact with the shell is used.
Conventionally, a structure is used in which a cushion layer made of a urethane foam is bonded to a working layer in which a web layer of tetrafluoroethylene fibers is integrated by needling. In addition, a working layer consisting of a web layer of ethylene tetrafluoride fiber was combined with a cushion layer of a constricted felt made of wool main material that had been shrunk by pressure and heat, and both were entangled and integrated by needle punching. Structures have also been used.

[0003]

The above-mentioned ethylene tetrafluoride fiber has a low frictional resistance and is a very good material for smooth roll rotation. However, it is necessary to form a web into a felt body. When needle punching is performed, the frictional resistance is low, so that the entanglement of the fibers is very poor, and the surface is easily fluffed. Also, if the entanglement by the needle punch is to be improved, a needle hole is generated by the needle punch on the surface of the web, and the smoothness of the surface is poor, and there is a problem that the outflow of toner cannot be sufficiently prevented. In particular, in recent years, the colorization of copying machines has been rapidly progressing, and the demand for a function for preventing outflow of toner has been increasing more and more. The present invention has been made in view of the above points, and its object is to improve the surface unevenness due to a needle hole or the like to improve the adhesion to a roll, and to make the roll smooth. It is an object of the present invention to provide a toner outflow preventing material for a copying machine which has a small frictional resistance so as to rotate in a vertical direction, has elasticity, and sufficiently prevents toner outflow.

[0004]

According to a first aspect of the present invention, there is provided a copying machine toner outflow preventing material which is provided at both ends of a roll located at an opening of a toner box and which is provided in contact with the roll. In the prevention material, the web layer of the ethylene tetrafluoride fiber serving as the working layer in contact with the roll and the fiber layer serving as the cushion layer are formed by felt punching with needle punching.
Entanglement of textiles so that there is no fuzz and hair loss
And the working layer surface is formed smooth by hot pressing so that the needle hole is closed .
According to a second aspect of the present invention, there is provided a toner for preventing a toner outflow for a copying machine provided at both ends of a roll located at an opening of a toner box, in contact with the roll.
C) of the ethylene tetrafluoride fiber which is the working layer in contact with the roll
Felt fluffing of web layer by needle punch
Strengthened the entanglement of the fibers so that there is no hair loss
Integrated state, is the needle hole and the working layer surface by hot pressing
The layer is formed so as to be smooth so as to be closed, and the smoothly formed working layer is bonded to a fiber layer or a cushion layer made of rubber or foam. The toner outflow prevention material for a copying machine has a working layer formed of a tetrafluoroethylene fiber layer having a small friction coefficient, and a cushion layer having a heat resistance temperature of 15%.
It is formed of an organic fiber layer obtained by combining one or two or more kinds of wool, polyester, nylon fiber or the like having a temperature of 0 ° C. or more, or formed of rubber or foam having a heat resistance temperature of 150 ° C. or more. Further, the cushion layer may be formed of a tetrafluoroethylene fiber layer similarly to the working layer.

[0005] The manufacturing method of the structure according to the first invention is that wool is compressed in advance by heat and pressure to form a felt, or polyester or nylon fibers are used alone or these fibers are used together with wool. After forming a cushion layer by needle punching the web layer of the organic fiber obtained by combining the above, the working layer composed of the tetrafluoroethylene fiber formed in advance by the needle punch is laminated so as to be the upper layer, and further the entire layer is formed. Are integrated by a needle punch. Alternatively, a method in which a web layer made of ethylene tetrafluoride fiber which is not needle-punched is placed on the cushion layer which has been needle-punched, and the whole is needle-punched and integrated. The thus integrated product is finally subjected to hot pressing to obtain a desired structure of the present invention. In the structure thus obtained, the number of needle punches can be increased by about 30% or more, and the depth of penetration of the needle can be reduced because the needle hole on the surface of the working layer is closed by hot pressing. As a result of deepening, the entanglement of the fibers is improved, the fluff and loosening of the felt are eliminated, the felt surface is formed smoothly, the adhesion to the roll is good, and the toner is prevented from flowing out Is achieved.

[0006] The hot press working may be any apparatus to which heat and pressure are applied, and a flat plate press, a roll press or the like is used. The temperature during hot pressing depends on the heat-resistant temperature of the cushion layer.
0-200 ° C is employed. The pressure at the time of the hot press working may be about ² to 10 kg / cm ² because a thickness gauge is used to determine the thickness of the felt.

In the method of manufacturing the structure according to the second invention, the number of needle punches in the web layer made of tetrafluoroethylene fiber is increased as compared with the conventional method, and the penetration depth of the needle is increased to reduce fluffing and hair loss. After prevention, heat-pressing is performed as described above, and then, it is made of an organic fiber, a rubber, or a foam in which one or two or more kinds of wool, polyester, and nylon fibers having a heat resistance temperature of 150 ° C. or more are combined. By bonding the cushion layer with an adhesive or a double-sided adhesive tape, a desired structure of the present invention is obtained.

[0008]

Example 1 A web layer of 6.7d × 76 mm tetrafluoroethylene fiber was laminated and subjected to needle punching to produce a working layer having a basis weight of 800 g / m ² . The number of needle punching at this time is 450
Times / cm ² . Next, the above-mentioned working layer was superimposed on a wool pressed felt as a cushion layer and subjected to needle punching at 600 times / cm ² to be integrated. The thickness became 3.3 to 3.7 mm. Using a flat plate heat press machine, the structure was set for 30 seconds under the conditions of a heating temperature of 150 ° C. and a pressure of 2 kg / cm ² so that the distance between the upper and lower hot plates was maintained at 2.8 mm. , Hot press. As a result, the overall thickness of the structure
It became 2.8-2.9 mm, and the surface of the working layer became smooth.
This cushion layer side is sliced smoothly and the thickness is 2.5mm
Of the toner was obtained.

Example 2 Example 2 is the same as Example 1 except that hot pressing was performed by a roll heat press instead of the flat plate press of Example 1 described above. In this case, the roll temperature is 180 ° C. and the pressure is 2 kg / cm.
^2. Roll gage is 2.6mm and speed of processed body is 1m
As a result of the treatment at / min, smoothness and thickness equivalent to those of the flat plate press were obtained.

Example 3 A web layer made of 6.7 d × 76 mm tetrafluoroethylene fiber was prepared with a number of needle punches of 1,000 times / cm ² and a basis weight of 800.
A working layer of g / m ² was produced. The finished thickness is 1.5-1.7mm. Next, the above-mentioned working layer was heated at a temperature of 1 with a roll press.
80 ° C, pressure 2kg / cm ² , thickness gauge 1.20mm
Was performed at a speed of 1 m / min. The thickness became 1.3 to 1.4 mm. The pressed working layer composed of ethylene tetrafluoride fiber and the cushion layer made of urethane foam were bonded together with a urethane adhesive to obtain a finished product. The product thickness was finished to 2.5mm.

Comparative Example In Example 3, the procedure was the same as that of Example 3, except that the needle punching of the web layer made of tetrafluoroethylene fiber was 450 times / cm ² and that the hot pressing was not performed.

The surface smoothness of the working layer of the above embodiment was measured in accordance with JIS.
The results measured based on -B-0651 are shown in Table 1 below.

[Table 1] Ra: median line average roughness Rmax: maximum height Rz: ten point average roughness Measuring instrument: stylus type surface roughness measuring instrument

As is clear from the results, the surface smoothness of the working layer was improved by performing the hot pressing. When the material for preventing toner outflow of FIG. 3 manufactured in this way was mounted as shown in FIGS. 1 and 2, an effect of preventing toner outflow was obtained. In the figure, 1 is a copying machine unit main body, 2 is a roll, 3 is a toner outflow prevention material, 4 is a working layer, 5 is a cushion layer, and 6 is a toner box.

[0014]

[Effect of the Invention] As can be seen from the above description, the present invention has a needle hole closed by hot pressing on the surface of the working layer in contact with the roll.
Since the smoothing formed so that, as a result of the needle holes of the needle punch caused the working layer surface is eliminated, conventionally increased needle punching times, that the penetration depth of the needle deep to enhance the entanglement of the fibers each other Fuzz and fuzz of the felt are eliminated, adhesion to the roll is good, toner leakage is further prevented, beautiful copy of print is obtained, and the effect is especially exhibited in color copy. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a copier unit.

FIG. 2 is a sectional view of a copier unit.

FIG. 3 is an enlarged cross-sectional view of a toner-spill prevention member for a copying machine.

[Explanation of symbols]

 1 Unit body 2 Roll 3 Toner outflow prevention material 4 Working layer 5 Cushion layer 6 Toner box

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-61970 (JP, A) JP-A-61-129664 (JP, A) JP-A-52-5371 (JP, A) JP-A-2- 302770 (JP, A) Full-scale sho 61-179573 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] To 1. A two ends of the roll to be positioned at the opening portion of the toner box, in the copying machine toner outflow prevention member which is provided in contact with the roll, of tetrafluoroethylene fibers serving as a working layer in contact with the roll U
Needle punching between the web layer and the fiber layer to be the cushion layer so that the felt does not fluff and
The toner is prevented from leaking out of a copying machine, characterized in that the fibers are integrated in a tightly entangled state, and the surface of the working layer is formed smoothly by a hot press so that the needle hole is closed. Wood. 2. A method of forming a working layer in contact with a roll of a toner spill-preventing material for a copying machine provided at both ends of a roll located at an opening of a toner box.
Felt fluffing of web layer by needle punch
Strengthened the entanglement of the fibers so that there is no hair loss
Integrated state, is the needle hole and the working layer surface by hot pressing
A toner outflow preventing material for a copying machine, wherein the material is formed so as to be smooth so as to be closed, and the functional layer formed so as to be smooth and bonded to a fiber layer or a cushion layer made of rubber or foam.