JPS6122383A - Cleaning blade member - Google Patents

Abstract

PURPOSE:To increase the durability by fixing a blade material to a supporting part by an adhesive agent layer, and forming this adhesive agent layer by a supporting member side adhesive agent, a blade material side adhesive agent, and a rough joining member provided between these adhesive agents. CONSTITUTION:A cleaning blade member is formed by fixing a blade material 2 consisting of an elastic material such as urethane rubber, etc. to a supporting member 1 consisting of a rigid material such as a metal, etc. by an adhesive agent layer 3. The adhesive agent layer 3 consits of a blade material side adhesive agent 3a, a supporting member side adhesive agent 3b, and a nonwoven fabirc layer 4 provided between both these adhesive agents 3a, 3b. As for the adhesive agent 3a, that which can obtain a good adhesive property to the blade material 2 is used, and as for the adhesive agent 3b, that which can obtain a good adhesive effect with respect to the supporting member 1 is used.

Description

Detailed Description of the Invention (1) Purpose of the Invention (Field of Industrial Application) The present invention relates to an image forming apparatus that uses an electrostatic transfer process, such as an electronic copying machine or a printer, and particularly to a cleaning blade thereof. .

(Prior art and problems to be solved) A well-known image forming method in which a process of transferring a transferable toner image on the surface of an endlessly running image carrier onto a transfer material and then repeating the process of cleaning residual toner that did not contribute to the transfer is repeated. Conventionally, a cleaning blade made of an elastic material such as a comb has been widely used as a cleaning means for removing residual toner in an apparatus because of its simple construction and excellent toner removal function.

Of course, many proposals have been made in the past regarding the structure of this type of cleaning blade, and one in which the blade material is adhesively fixed to a support member made of a rigid material such as metal has already been proposed.

FIG. 3 shows an example of such a previously proposed cleaning blade member, in which a blended material 2 is bonded to a support member 1 with an adhesive 3.

However, it is not always easy to strongly bond metal and synthetic rubber such as urethane in this way, and when the blade is pressed against and rubbed against the image carrier of the image forming apparatus,
When a torque is applied in the direction of arrow A in FIG. 3, the adhesive end tends to peel off.

In order to avoid such drawbacks, the applicant has already
The adhesive 3 is divided into two layers 3a and 3b, and the adhesive strength between the adhesives is strong, and one adhesive layer 3a is attached to the blade material 2.
In addition, it has been proposed that the other adhesive layer 3b is configured to adhere well to the support member 1.

For such a product, for example, in a two-layer adhesive structure, a urethane film hot melt adhesive (trade name: manufactured by Nippon Matai ■, grade U) is used as the adhesive on the support member side.
H-203), and as the adhesive on the blade material side, a polyester film hot melt adhesive (product name: manufactured by Nihon Matai ■, grade PH-413) can be used.

Although it is possible to improve the bonding function of the blade material to the support member by using such a structure, the adhesive strength of hot melt adhesives is highly temperature dependent and changes in temperature, so it cannot be used in high temperature environments. The problem of so-called delamination between adhesives could not be avoided.

The present invention has been made to deal with this situation, and by disposing a nonwoven fabric between two layers of adhesive, delamination can be avoided, and thus the durability of the leaning blade member can be greatly improved. The purpose is to

(2) Structure of the Invention In order to achieve the above object, in the present invention, a cleaning blade is bonded to a support member using a two-layer adhesive, and a thin non-woven fabric is used between the adhesive layers. By arranging the bonding member, the adhesive function is improved in a high-temperature environment.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a cleaning blade member according to the present invention, in which a blade member 2 made of an elastic material such as urethane rubber is fixed to a support member 1 made of a rigid material such as metal by an adhesive layer 3. 0 The adhesive layer 3 consists of a blade material side adhesive 3a, a supporting member side adhesive 3b, and a nonwoven fabric layer 4 disposed between these adhesives.

The adhesive 3a is selected to have good adhesion to the blade material, and the adhesive 3b is selected to be good to the support member.

For example, as a film hot melt adhesive, a polyester film hot melt adhesive (manufactured by Nippon Matai Co., Ltd.) is used as the support member side adhesive.

Product name Nigerade PI-1-413), and the blade side adhesive is a urethane film hot melt adhesive (
Manufactured by Nippon Matai Co., Ltd., product name Nigerade UH-203),
As the liquid adhesive, use an epoxy liquid adhesive (A Y2O2, manufactured by Ciba Geigy) on the support member side.

As the blade side adhesive, a urethane liquid adhesive (manufactured by Sanyo Kasei, 5OOOS) is effective.

In such a device, the adhesive layer of the cleaning blade member shown in the first figure is formed by disposing a thin nonwoven fabric between solid adhesives.

The nonwoven fabric is H-81015 manufactured by Nippon Vilene Co., Ltd.
Thickness 0.04 mm, made by Tijin, R, T-01
Select from 03W thickness 0.05i+m, etc.

In order to use such a nonwoven fabric as an interior material, in the case of a film-like hot melt adhesive, the temperature of the supporting member must be 120°C.

Heat it, apply adhesive on the supporting member side, then place the nonwoven fabric on it, then place adhesive on the blade side, and place the blade on it.
Cool under pressure from the blade side. In the case of liquid adhesive, after applying the adhesive to the specified positions on both the support member and the blade material using the silk screen method, a nonwoven fabric is placed on one side, and this is bonded by sandwiching it with the adhesive and heated at 50°C for 4 hours. Heat and cure.

Since it has such a configuration, the support member.

The adhesive on both sides of the blade material impregnates the gaps between the fibers of the non-woven fabric until it hardens and adheres in that state, so in addition to the adhesive force between the adhesives, the fibers of the non-woven fabric resist the tendency to peel. As mentioned above, the force against the torque in the peeling direction is extremely strong.

Furthermore, the basic requirement is that each of the adhesives 3a and 3b must have strong adhesion to the blade material 2 and the supporting member 1, and in addition, in order to prevent delamination, Since the adhesive force between the adhesives must be equal to or higher than the above-mentioned adhesive force, selection becomes more difficult.

On the other hand, in the present invention, since the nonwoven fabric is present in the bonded part of the adhesive, the physical strength of the nonwoven fabric itself is added and delamination is less likely to occur, so the adhesive force to the support member and the blade is strong. This is advantageous because the adhesive can be selected with this as the main condition.

FIG. 2 is a graph showing the durability of the present invention, with the symbol A
B is the cleaning blade member made of the above-mentioned two-layer adhesive.
This shows the results of testing the blade member according to the present invention in an environment of 60'C, and it can be seen that the predicted life of the adhesive force is significantly increased.

In the above embodiment, a nonwoven fabric was used as the bonding member, but this was Japanese paper with a thickness of about 30 μm.

A loosely woven or knitted fabric or the like may also be used.

(3) Effects of the invention Since the present invention has the above configuration 2 effect,
In particular, the durability of a cleaning blade member using an adhesive whose adhesive strength is strongly temperature dependent can be greatly increased.

[Brief explanation of drawings]

Fig. 1 is a side view of a cleaning blade member showing an embodiment of the present invention, Fig. 2 is a graph showing the durability of the cleaning blade member according to the invention, and Fig. 3 is a partial slope showing a known cleaning blade member. figure. ■...Supporting member, 2...Cleaning blade material,
3...Adhesive layer, 4...Joining member.

Claims (1)

[Claims] It consists of a support member and a blade material fixed to the support member by an adhesive layer, and the adhesive layer is connected to an adhesive on the support member side, an adhesive on the blade material side, and a coarse joint between these two adhesives. A cleaning blade member formed from a member.