JPH04362980A - Conveying belt for transfer - Google Patents

Abstract

PURPOSE:To improve joining property between plural layers forming a conveying belt for transfer. CONSTITUTION:A conveying belt 11 for transfer is composed of an electric conductive layer 12 made of an org. material having <=10<10>OMEGA.cm volume resistivity, a tensile body layer 13 made of an org. material having >=200 kg/mm<2> modulus of tensile elasticity and >=10<10>OMEGA.cm volume resistivity and a surface coating layer 14 made of an org. material having >=10<10>OMEGA.cm volume resistivity. Since the org. materials of the layers 12-14 are of the same kind, satisfactory joining property is ensured.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer conveyance belt used primarily in electrostatic recording devices such as electronic copying machines.

0002

[Prior art] Conventionally, the volume resistance is 1010Ω・cm
A transfer/transport belt formed by laminating the following conductive layer and a dielectric layer having a volume resistivity of 1010 Ω·cm or more is known (see, for example, Japanese Patent Application Laid-Open No. 63-51236).

[0003] In such belts, polyester resin, polyamide resin, fluororesin, etc. (especially polyester resin) are generally used as the dielectric layer.

0004

[Problem to be solved by the invention] However, these
The resin used as the dielectric layer is a material that is difficult to adhere to other materials, and there is a problem in that adhesion must be particularly taken into consideration when bonding to the conductive layer.

The main object of the present invention is to provide a transfer/transport belt consisting of a plurality of layers bonded with good adhesiveness.

[0006]

[Means for Solving the Problems] The invention of claim 1 provides a conductive layer made of an organic material having a volume resistivity of 1010 Ω·cm or less, and an organic material having a tensile modulus of elasticity of 200 kg/mm2 or more and a volume resistivity of 1010 Ω·cm or more. The structure includes a tension body layer made of a material and a surface coating layer made of an organic material having a volume resistivity of 1010 Ω·cm or more.

[0007] In the invention according to claim 2, the surface coating layer is made of an ultraviolet curable resin.
In the invention, the tension body layer is a film belt formed by winding a plastic film many times and bonding the films together.

[0008]

[Function] According to the invention of claim 1, since the conductive layer, the tension body layer and the surface coating layer are all made of organic materials,
In addition to good bondability, the volume resistance of the tension layer is 101
Since it is 0Ω·cm or more, the tension body layer functions not only as a tension body layer but also as a dielectric layer. Furthermore, the surface coating layer compensates for the unevenness on the surface of the tension body layer, making the belt surface smooth and uniform.

According to the second aspect of the invention, the surface coating layer can be cured and molded quickly. According to the third aspect of the invention, characteristics such as strength are substantially continuous over the entire circumference of the belt, like a transfer conveyance belt.

0010

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a transfer/transport belt 11
The conductive layer 12 is made of an organic material having a volume resistivity of 1010 Ω·cm or less and is located on the inner surface of the belt, and the conductive layer 12
a tension body layer 13 located on the outside of the tension body layer 13 made of an organic material having a tensile modulus of elasticity of 200 kg/mm2 or more and a volume resistance of 1010 Ω·cm or more; Surface coat made of organic material
ting layer 14.

With the above structure, since the conductive layer 12, tension body layer 13, and surface coating layer 14 are all made of organic materials, the bondability between each layer is good.

[0013] Also, the tensile modulus is 200 kg/mm2
The tension body layer 13 made of the organic material described above has a volume resistivity of 1010 Ω·cm or more, so in addition to functioning as the tension body of the belt 1, it also functions as a dielectric layer together with the surface coating layer 14. .

The surface coating layer 14 not only protects the outer surface of the belt 11 but also fills in the unevenness on the surface of the tension body layer 13, so even if there is a slight difference in the tension body layer 13, the surface of the belt 1 is covered. can be made smooth and uniform.

[0015] Furthermore, if a film belt is used as the tension body layer 13, which is formed by wrapping a plastic film many times and joining the films together by adhesion using an adhesive or fusion using an organic solvent, the physical properties such as strength can be improved. is substantially continuous in the circumferential direction of the belt, and has characteristics equivalent to those of a seamless belt.

If the surface coating layer 14 is made of an ultraviolet curable resin in particular, it not only protects the belt surface, but also shortens the curing time due to external rays, so that curing and molding can be carried out quickly, and moreover, no solvent is used. It has the advantage that it does not need to be used, and it is easy to functionalize the belt surface (for example, dielectricity, printing durability, low coefficient of friction, low abrasion, toner resistance, etc.).

Next, a specific example of the present invention will be explained.

[0018] Carbon black was dispersed in Hytrel (manufactured by DuPont-Toray Co., Ltd.), which is a polyester elastomer, to form a film with a volume resistance of 106 Ω·cm, which was then melted using an ultrasonic melting machine. The inner diameter is 130mm,
A belt (conductive layer) with a thickness of 150 μm was obtained.

[0019] When this is attached to the sleeve, Vylon 3, which is a polyester elastomer, is coated on the surface of the sleeve.
A biaxially oriented polyethylene terephthalate film (PET) (Lumira-S10#9, manufactured by Toray Industries, Inc.) coated with a methyl ethyl ketone/toluene mixed solvent solution of 0 (manufactured by Toyobo Co., Ltd.) was rolled up at 80°C. Dry for 30 minutes with
A 40 μm PET layer (tensile layer) was obtained. At this time, P
When ET film is rolled up alone (without conductive layer)
, the tensile modulus was 200 kg/mm2 or more. In this state, there was a step of about 11 μm at the end of the film.

[0020] On top of this, the surface was coated with Three Bond 3042C manufactured by Three Bond Co., Ltd. as an ultraviolet curing resin, and the cumulative amount of ultraviolet light was 1500 mj/cm2.
Irradiate with ultraviolet rays so that the thickness becomes approximately 5 μm.
A transfer conveyance belt was obtained as a surface coating layer.

[0021] At this time, the level difference at the end of the film winding of the tension body layer was 3 μm or less when measured from above the surface coating layer, and was almost indiscernible. Further, when the volume resistivity of the surface coating layer was measured, it was found to be 1015 Ω·cm.

[0022]

Effects of the Invention According to the invention as claimed in claim 1, since the conductive layer, the tension body layer and the surface coating layer are all made of organic materials, the bondability between each layer is good, and the volume resistance of the tension body layer is 10.
Since it is 10 Ω·cm or more, the tension body layer functions not only as a tension body but also as a dielectric layer together with the surface coating layer. In addition, the surface coating layer compensates for irregularities on the surface of the tension body layer, making the belt surface smooth and uniform.

According to the second aspect of the invention, since the surface coating layer is formed using an ultraviolet curable adhesive, the surface coating layer can be cured and formed quickly, and the belt surface can be easily functionalized. becomes. In the third aspect of the invention, since the tension body layer is constituted by a film belt, properties such as strength are substantially continuous over the entire circumference of the belt, like a seamless belt.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a transfer/conveyance belt.

[Explanation of symbols]

11 Transfer/convey belt 12 Conductive layer 13 Tension body layer 14 Surface coating layer

Claims (3)

[Claims] 1. A transfer conveyance belt comprising a belt base material layer laminated with a surface layer and used as a transfer conveyance belt, wherein the belt base material layer has a volume resistivity of 1010 Ω.
・A conductive layer made of an organic material of cm or less, a tensile modulus of elasticity of 200 kg/mm2 or more, and a volume resistivity of 1010 Ω・c
1. A transfer conveyance belt comprising: a tension body layer made of an organic material having a volume resistivity of 1010 Ω·cm or more; 2. The transfer conveyance belt according to claim 1, wherein the coating layer is made of an ultraviolet curable resin. 3. The transfer conveyance belt according to claim 1, wherein the tension body layer is made of a film belt formed by wrapping a plastic film many times and bonding the films together.