JP2015096930A - Meandering prevention member and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide, in an image forming apparatus using an endless belt, a meandering prevention member that prevents meandering and skew of the endless belt, has excellent environmental characteristics that can suppress peeling and wear during a long-term use, and can be manufactured at a low cost; and a manufacturing method of the same.SOLUTION: There is provided a meandering prevention member that is provided by bonding on the inner peripheral surface side of an endless belt main body having flexibility, and consists of a substrate that is obtained through extrusion molding with a thermoplastic elastomer resin as material and a primer layer that is provided on one surface of the substrate and composed of a synthetic resin not including toluene in a solvent.

Description

  The present invention relates to a meandering prevention member used for a transfer belt in an electrophotographic image forming apparatus and a method for manufacturing the same.

Reinforcement base material having a tensile modulus of 5000 kg / cm ² or more, an adhesive layer having a thickness of 5 to 100 μm applied on both sides of the reinforcement base material, and a JISA hardness of 30 Hs or more and 95 Hs or less adhered to one of the adhesive layers A meandering prevention guide composed of the above guide material is known (Patent Document 1).

  An intermediate transfer belt used in an electrophotographic image forming apparatus, comprising: an endless belt body that carries a toner image; and a skew feeding prevention member provided on a back surface of the belt body, the skew feeding prevention An intermediate transfer belt is also known in which the member includes a resin layer containing polycarbonate-based polyurethane (Patent Document 2).

JP-A-7-187435 JP 2011-75627 A

  The present invention provides a low-cost meandering prevention member excellent in environmental characteristics capable of preventing meandering and skewing of an endless belt and suppressing peeling and wear in long-term use in an image forming apparatus using an endless belt, and It aims at providing the manufacturing method.

In order to solve the above-mentioned problem, the meandering prevention member according to claim 1,
A meander-preventing member provided by being bonded to the inner peripheral surface side of an endless belt body having flexibility,
A substrate obtained by extrusion molding using a thermoplastic elastomer resin as a material;
A primer layer made of a synthetic resin not containing toluene in a solvent, provided on one surface side of the substrate;
It is characterized by that.

The invention according to claim 2 is the meander-preventing member according to claim 1,
The synthetic resin includes chlorinated polypropylene, polymethylene polyphenyl isocyanate, 4,4-diphenylmethane diisocyanate,
It is characterized by that.

The invention according to claim 3 is the meandering prevention member according to claim 1 or 2,
T-peeling when one surface side provided with the primer layer is torn at a peeling speed of 100 mm / min according to JIS K6854-3, the base body bonded to the inner peripheral surface of the endless belt body through an adhesive member The strength is 5N / 5mm or more.
It is characterized by that.

The invention according to claim 4 is the meander-preventing member according to claim 3,
The adhesive member is a double-sided tape in which a synthetic rubber-based adhesive is applied to both surfaces of the base material using a nonwoven fabric as a base material.
It is characterized by that.

The invention according to claim 5 is the meander-preventing member according to claim 3,
The adhesive member includes an acrylic-modified silicone resin;
It is characterized by that.

The invention according to claim 6 is the meander-preventing member according to any one of claims 1 to 5,
Toluene emission amount is 0.05 μg / g or less,
It is characterized by that.

In order to solve the above-mentioned problem, the manufacturing method of the meandering prevention member according to claim 7,
A thermoplastic elastomer resin is directly fed into an extruder, and a synthetic resin liquefied with a solvent is applied to one surface of a substrate to be extruded through a die provided in the extruder while being synchronized with extrusion. To form a primer layer,
It is characterized by that.

According to the first to sixth aspects of the present invention, low-cost meandering prevention that can suppress peeling and wear on the inner peripheral surface of the endless belt main body during long-term use while suppressing release of the volatile organic solvent. A member can be provided.
According to invention of Claim 7, the meander prevention member which can suppress peeling and abrasion on the internal peripheral surface of an endless belt main body in long-term use can be manufactured at low cost.

2 is a partially cutaway perspective view of an intermediate transfer belt 141 as an example of an endless belt. FIG. (A) is a schematic cross-sectional view showing the configuration of the meandering prevention member 1, and (b) is a schematic configuration diagram showing an adhesion portion between the belt body 141 a and the meandering prevention member 1. It is explanatory drawing of a T-type peeling test, (a) is a figure which shows the part which produces the test piece used for a T-type peeling test, (b) is a side view of a test piece, (c) is a test of a T-type peeling test It is a figure which shows a method. It is a figure which shows the cross-cut test result after the dematcher test (bending extension test) about the meandering prevention member 1. FIG. It is a figure which shows the measurement result of the hardness of the meandering prevention member 1, tensile strength, elongation, Taber abrasion amount, and T-type peeling strength. It is a figure which shows the amount of diffusion of the volatile organic solvent of the meandering prevention member. It is a cross-sectional schematic diagram which shows the image formation part of the image forming apparatus 100 to which the meander prevention member 1 is applied.

Next, examples as specific examples of embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples.
Also, in the description using the following drawings, it should be noted that the drawings are schematic and the ratio of each dimension and the like are different from the actual ones, and are necessary for the description for easy understanding. Illustrations other than the members are omitted as appropriate.

(1) Overall Configuration and Operation of Image Forming Apparatus (1.1) Configuration and Operation of Image Forming Unit FIG. 7 is an image forming unit of an image forming apparatus 100 as an example to which the meandering prevention member 1 according to the present embodiment is applied. It is a cross-sectional schematic diagram which shows.
Hereinafter, the overall configuration and operation of the image forming unit of the image forming apparatus 100 will be described with reference to the drawings.

  The image forming unit of the image forming apparatus 100 includes an exposure device 110, a photosensitive unit 120, a developing device 130, a transfer device 140, a paper transport device 150, and a fixing device 160, and includes an image processing unit (not shown). The received image information is formed as a toner image on the paper P sent from a paper feeding device (not shown).

  The photosensitive unit 120 includes a photosensitive drum 121 that is provided below the exposure apparatus 110 in parallel and is driven to rotate. A charging roller 122, an exposure device 110, a developing device 130, a primary transfer roller 142, and a cleaning device 124 are arranged along the rotation direction of the photosensitive drum 121.

In the developing device 130, a developing roller 132 disposed to face the photosensitive drum 121 and a supply roller 133 that supplies toner in the developing housing 131 to the developing roller 132 side are disposed in contact with the developing roller 132. The toner is supplied from 133 to the developing roller 132. A layer regulating blade 134 that regulates the toner layer thickness is disposed in contact with the developing roller 132.
Each of the developing devices 130 is configured in the same manner except for the developer contained in the developing housing 131, and each forms a toner image of yellow (Y), magenta (M), cyan (C), and black (K). .

  The surface of the rotating photosensitive drum 121 is charged by the charging roller 122, and an electrostatic latent image is formed by the latent image forming light emitted from the exposure device 110. The electrostatic latent image formed on the photosensitive drum 121 is developed as a toner image by the developing roller 132.

The transfer device 140 includes an intermediate transfer belt 141 onto which each color toner image formed on the photosensitive drum 121 of each photoconductor unit 120 is transferred, and each color toner image formed on each photoconductor unit 120 to the intermediate transfer belt. A primary transfer roller 142 that sequentially transfers (primary transfer) to 141, and a secondary transfer belt 143 that collectively transfers (secondary transfer) each color toner image transferred on the intermediate transfer belt 141 onto the paper P. ing.
The secondary transfer belt 143 is stretched by a secondary transfer roller 144 and a peeling roller 145, and is sandwiched between a backup roller 146 and a secondary transfer roller 144 disposed on the back side of the intermediate transfer belt 141 to perform secondary transfer. The part TR is formed.

Each color toner image formed on the photoconductor drum 121 of each photoconductor unit 120 is sequentially electrostatically transferred (primary transfer) onto the intermediate transfer belt 141 by a primary transfer roller 142 to which a predetermined transfer voltage is applied, and each color toner. A superimposed toner image is formed by superimposing.
When the superimposed toner image on the intermediate transfer belt 141 is conveyed to the secondary transfer portion TR, the paper P is supplied from the paper feeding device to the secondary transfer portion TR in accordance with the timing. A predetermined transfer voltage is applied to the backup roller 146 that faces the secondary transfer roller 144 via the secondary transfer belt 143, and the multiple toner images on the intermediate transfer belt 141 are collectively transferred to the paper P.

  Residual toner on the surface of the photosensitive drum 121 is removed by the cleaning device 124 and collected in a waste toner storage unit (not shown). The surface of the photosensitive drum 121 is recharged by the charging roller 122.

  The sheet P on which the toner image is transferred by the transfer device 140 is conveyed to the fixing device 160 via the sheet conveying device 150 in a state where the toner image is not fixed. The sheet P conveyed to the fixing device 160 is fixed with a toner image by the action of pressure bonding and heating by a pair of fixing belts 161 and a pressure roller 162.

(1.2) Intermediate Transfer Belt FIG. 1 is a partially cutaway perspective view of an intermediate transfer belt 141 as an example of an endless belt.
The intermediate transfer belt 141 includes an endless belt main body 141a and a meandering prevention member 1 bonded to an inner peripheral surface along one end edge of the belt main body 141a. The belt main body 141a is manufactured into a seamless endless shape by injecting a molten resin material such as polyimide (PI) resin or polyester resin into a cylindrical shape and performing centrifugal molding while heating. Carbon black may be dispersed in polyimide (PI) resin, polyester resin, etc. for the purpose of adjusting conductivity.

As shown in FIG. 7, the intermediate transfer belt 141 configured as described above is suspended between a suspension roller 148 and a driving roller 147, supported by a tension roller 149, and subjected to an appropriate tensile stress. .
The drive roller 147 is formed with a guide groove 147a that is guided by being inserted into the meandering prevention member 1 on the end side of the peripheral surface. Therefore, as the suspension roller 148 and the drive roller 147 rotate, the meandering prevention member 1 is fitted in the guide groove 147a so that the intermediate transfer belt 141 runs without meandering.

(2) Meandering prevention member (2.1) Configuration of meandering prevention member FIG. 2 (a) is a schematic sectional view showing the configuration of the meandering prevention member 1, and FIG. 2 (b) is an adhesion between the belt body 141a and the meandering prevention member 1. It is the structure schematic which shows a part. For the sake of explanation, the belt main body 141a and the meandering prevention member 1 are enlarged and drawn to be thicker than the actual thickness.
The meandering prevention member 1 includes a base 1a and a primer layer 1b provided on one surface side of the base 1a. The base 1a is made of an elastic body and absorbs a shearing force applied to the meandering prevention member 1.
The primer layer 1b improves the adhesive strength between the base member 1a and the belt member 141a and the adhesive member AD used for bonding.
If necessary, release paper 1c may be attached to protect the primer layer 1b until the meandering prevention member 1 is bonded to the belt body 141a via the adhesive member AD.

(2.2) Substrate The substrate 1a is a belt-like member having a rectangular cross section obtained by extrusion molding using a thermoplastic elastomer resin as a material.
The thermoplastic elastomer resin has a D scale hardness of 20 or more and 30 or less measured according to JIS K7215, a tensile strength of 10 MPa or more measured according to JIS K7113-1995, and a measurement according to JIS K7204 (Taber abrasion tester In this case, a thermoplastic polyester elastomer or a thermoplastic polyurethane elastomer having a Taber wear amount of 25 mmg or less by wear wheel CS-10 and 1000 times with a load of 1000 g) is preferable.

If the D scale hardness exceeds 30, the elasticity for absorbing the shearing force acting repeatedly by being driven along the curved surface of the driving roller 147 is insufficient, and the load is concentrated on the belt main body 141a. There is a risk of cracks occurring in the main body 141a.
On the other hand, when the D scale hardness is less than 20, the deformation due to the shearing force received by the base 1a when the meandering of the belt main body 141a is large, and the meandering regulation action may not be exhibited.

  When the Taber wear amount of the base 1a is 25 mg or less, even if the rotation preventing drive 1 is repeatedly fitted in the state where the meandering prevention member 1 is fitted in the guide groove 147a, the wear of the meandering prevention member 1 is suppressed, and it takes a long time. The meandering control action is maintained.

  The cross-sectional shape of the meandering prevention member 1 is preferably a substantially rectangular cross-section so as to sufficiently exhibit the meandering regulating action. Specifically, from the viewpoint of the meandering regulation effect and durability, the width of 3 to 10 mm and the thickness of 0.3 to 2 mm are preferable. In particular, from the viewpoint of the meandering regulating action, the width is preferably 3 mm or more and 7 mm or less, and from the viewpoint of suppressing cracks due to bending, the thickness is more preferably 1.0 mm or less.

  Suitable thermoplastic polyester elastomer resin materials for the substrate 1a having such characteristics include, for example, Hytrel manufactured by Toray DuPont, Estellar manufactured by Aronkasei Co., Ltd., and Daiichi Seika Co., Ltd. as a thermoplastic polyurethane elastomer resin material. Examples include Rezamin P.

(2.3) Primer Layer The primer layer 1b is formed by liquefying a synthetic resin base material using a solvent not containing toluene and applying it to one surface of the substrate 1a. Specifically, as a material of the primer layer 1b, 3M K type NT made of a mixture of chlorinated polypropylene, polymethylene polyphenyl isocyanate, and 4,4-diphenylmethane diisocyanate can be used as a synthetic resin. Examples of the solvent not containing toluene include a solvent in which 50 parts by weight of methylcyclohexane and butyl acetate are mixed.

Volatile components such as volatile organic compounds (VOC) are generated from the members (base 1a and primer layer 1b) constituting the meandering prevention member 1 bonded to the belt main body 141a and the adhesive member between the belt main body 141a and the meandering prevention member 1. There are things to do. In addition, it takes a long time to remove the remaining volatile organic solvent in the reduced rate drying region, and there is a possibility that the adhesiveness between the belt main body 141a and the meandering prevention member 1 deteriorates.
The meandering-preventing member 1 according to the present embodiment is formed by applying a synthetic resin base material liquefied using a solvent that does not contain toluene to the primer layer 1b. The residual amount of the volatile organic solvent is reduced, and emission of volatile components can be reduced.

The formation of the primer layer 1b on the substrate 1a can be performed by liquefying the substrate with a solvent and impregnating it with a felt or the like, as will be described later.
Then, after drying for 30 seconds to 24 hours after the application of the primer layer 1b, the release paper 1c is pasted on the surface of the primer layer 1b, and the meandering prevention member 1 is attached to the belt main body 141a via the adhesive member AD. The primer layer 1b is protected until bonded.

(2.4) Extrusion Processing The meandering-preventing member 1 according to the present embodiment is a base body in which a thermoplastic elastomer resin is directly fed into an extrusion molding machine and extruded through a die provided in the extrusion molding machine. A primer layer is formed on one surface by applying a synthetic resin liquefied with a solvent in synchronization with extrusion.

Although it does not specifically limit as a shaping | molding method by an extrusion process, As an example, it can produce as follows.
First, an extrusion mold in which a thermoplastic elastomer resin is heated and kneaded at, for example, 180 ° C. to 230 ° C. with an extruder, melted, passed through a filter, and then heated to 180 ° C. to 230 ° C. It is melt-extruded from a slit-shaped T-shaped die discharge port and cooled and solidified to obtain a continuous substrate 1a having a width of 3 mm to 10 mm and a thickness of 0.3 mm to 2 mm.

A primer layer material liquefied with a solvent is impregnated into a felt or the like on one surface of a continuous substrate 1a extruded from a T-type die discharge port, and continuously applied and dried. The pattern 1c is applied to the surface of the coated and dried primer layer 1b to obtain a continuous meandering preventing member.
Then, the meandering prevention member 1 is obtained by cutting to a required length according to the inner peripheral length of the belt main body 141a attached via the adhesive member AD.

(2.5) Volatile organic solvent Volatile organic compound released from meandering prevention member 1
(Organic Compound, hereinafter referred to as VOC) is evaluated by outgas analysis.
Specifically, after the extruded base 1a alone and the meandering prevention member 1 on which the primer layer 1b is formed are sealed in a smart bag, 4 L of nitrogen gas is introduced and heated in an environment of 65 ° C. for 2 hours. To do. 1 L of nitrogen gas (outgas) in the heated smart bag is collected from a gas adsorption tube (Tenax tube, for example, 110-GR0 manufactured by GL Sciences Inc.) and measured with a gas chromatograph analyzer.
Separately, calibration curves of toluene and methylcyclohexane and butyl acetate, which are solvents for the primer material, are prepared, and the amounts of toluene, methylcyclohexane and butyl acetate in the outgas are quantified.

(2.6) Bending Strength of Meandering Prevention Member For the meandering prevention member 1, a bending extensibility test is performed using a dematcher testing machine according to JIS K6260, and the meandering prevention member 1 after the bending cycle is a grid according to JIS K5400. The adhesion between the substrate 1a and the primer layer 1b by bending was evaluated by an eye test.
Specifically, the meandering prevention member 1 is fixed to the chuck on both the upper and lower sides as a 180 mm test piece in a dematcher bending tester, and a reciprocating motion is given to the lower end side so that the chuck interval changes from 130 mm to 40 mm, up to 2000 times. The bend was repeated.
In addition, a 1 mm wide cut was made on the primer layer 1b with a cutter on the primer layer, the number of grids was 100, cellophane tape was applied so as to cover all grids, and it was quickly peeled off to the substrate 1a. Adhesion was evaluated by counting the number of grids that remained attached.

(2.7) Adhesive Member The meandering prevention member 1 according to the present embodiment is bonded to the belt main body 141a via the adhesive member AD to constitute the intermediate transfer belt 141.
The adhesive member AD is a liquid adhesive composed of Dainippon Ink & Chemicals, Inc. 8840ER, which is a double-sided tape in which a nonwoven fabric is used as a base material and a synthetic rubber adhesive is applied on both sides of the base material, and an acrylic-modified silicone resin. Cemedine Super X No. 8008, Super Gold No. 777.

  In particular, in the intermediate transfer belt 141 in which the meandering prevention member 1 is bonded using a double-sided tape in which a synthetic rubber adhesive is applied to both surfaces of the base material using the non-woven fabric as the base material, the non-woven fabric has flexibility. In addition, since it has sufficient tensile strength, it can easily follow the bending deformation at the contact portion of the suspension roller 148 and the drive roller 147 when the intermediate transfer belt 141 is running, and the belt main body 141a and the meandering prevention member 1 There is little possibility that the meandering prevention member 1 will be broken by the shearing force acting on the interface, and the displacement and peeling of the meandering prevention member 1 are suppressed.

(2.8) T-type peel strength of meander-preventing member FIG. 3 is an explanatory view of a T-type peel test, and FIG. 3 (a) is a diagram showing a part for creating a test piece TP to be used for the T-type peel test. 3 (b) is a side view of the test piece TP, and FIG. 3 (c) is a diagram showing a test method for a T-type peel test.
As shown in FIG. 3A, the belt main body 141a was cut to the same width as the meandering prevention member 1 having the width W1 to obtain a test piece TP having a width W1 and a length of 50 mm. 3B-1 is a side view of the test piece viewed from the direction of arrow A, and FIG. 3B-2 is a side view of the test piece viewed from the direction of arrow B.

  As shown in FIG. 3C, one end of the obtained test piece TP is peeled off at the interface between the belt main body 141a and the meandering prevention member 1, the belt main body 141a is fixed, and the meandering prevention member 1 is moved in the direction of arrow C. Pulling at a speed of 100 mm / min and measuring the tensile force P1 (N) when tearing into a T-shape. T-type peel strength (P1 / W1) (N / mm) is calculated using the measured P1 and W1.

The meandering prevention member 1 according to the present embodiment has a T-shaped peel strength of 5 N / 5 mm or more in which one surface side on which the primer layer 1 b is provided is bonded to the inner peripheral surface of the belt body 141 a via the adhesive member AD.
If the T-shaped peel strength is 5 N / 5 mm or more, the meandering prevention member 1 may be broken by the shearing force acting on the interface between the belt main body 141 a and the meandering prevention member 1 when the intermediate transfer belt 141 is running. The position shift and peeling of the meandering preventing member 1 are suppressed even by a rotational drive for a long time.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention in more detail, it is not limited to a following example.

"Creating a meandering prevention member"
Heat-kneaded at about 220 ° C with an extruder, using Toray DuPont's Hytrel as a thermoplastic polyester-based elastomer resin, Aronkasei Estelal as a thermoplastic polyurethane-based elastomer resin, and Rezamin P from Dainichi Seika as a material. After melting and passing through a filtration filter, it was liquefied with a solvent on one surface of a continuous substrate 1a having a width of 5 mm and a thickness of 1 mm extruded from a T-type die discharge port heated to about 190 ° C. As a primer layer material, 3M K type NT was continuously applied and dried.
And after sticking on the surface of the primer layer 1b which apply | coated and dried the release paper 1c via the crimping | compression-bonding roller etc., fixed length cutting was carried out to required length, and the meander prevention member 1 was obtained. Moreover, the meandering prevention member 1 which does not provide the primer layer 1b as a comparative example was also prepared.
In measuring the Taber abrasion amount, a sheet material molded to both sides 100 mm and thickness 1 mm was prepared.

"Production of intermediate transfer belt"
As a polyimide (PI) -based resin material, a molten resin material of Kapton HA manufactured by DuPont is injected into a cylindrical mold and is subjected to centrifugal molding while being heated. On the inner peripheral surface of the belt body 141a which is manufactured to be seamless and endless. The meandering prevention member 1 was adhered to each other using a double-sided tape (8840ER manufactured by Dainippon Ink & Chemicals, Inc.) and an adhesive (Super X No. 8008, Super Gold No. 777 manufactured by Cemedine Co., Ltd.). The intermediate transfer belt 141 of Comparative Examples 1 to 3 to which the transfer belt 141 and the meandering prevention member 1 without the primer layer 1b were bonded was obtained.

FIG. 4 shows a cross-cut test result after a dematcher test (bending / extensibility test) for the meandering prevention member 1 applied to Example 1 and Example 2.
FIG. 5 shows the hardness, tensile strength, elongation, Taber abrasion amount, T-type peel strength of Comparative Example 1, Comparative Example 2 and Comparative Example 3 in which Example 1, Example 2, Example 3 and primer layer 1b are not formed. The measurement results are shown.
In the following tests, after bonding the belt main body 141a and the meandering prevention member 1, after standing for 72 hours in a normal environment and then performing a T-type peel test, the normal state was obtained, and after bonding, 50 ° C 95% RH The sample was allowed to stand for 72 hours in a high-temperature and high-humidity environment to promote wet heat aging, and then stored in a normal environment for 24 hours and subjected to a T-type peel test after wet heat aging.

"Adhesion after bending test"
As shown in FIG. 4, in the cross cut test after the dematcher test (bending extensibility test), in any of the meandering prevention members 1 applied to Example 1 and Example 2, the bending cycle is 1000 times in the normal state. Also in the cross cut test after 2000 times, the peeling of the primer layer 1b was not confirmed.
Therefore, when the meandering prevention member 1 having the primer layer 1b formed on the one surface side is bonded to the inner peripheral surface of the belt main body 141a through the adhesive member, it is suspended for a long time when the intermediate transfer belt 141 travels. Even when the bending roller 148 and the driving roller 147 are repeatedly bent, the displacement and peeling of the meandering prevention member 1 are suppressed.

"Confirm physical properties"
As shown in FIG. 5, the hardness of the meander-preventing member 1 in each of Examples 1 to 3 and Comparative Examples 1 to 3 has a D scale hardness of 20 to 30 in accordance with JIS K7215, and JIS K7113- The tensile strength as measured according to 1995 was 10 MPa or more, and the Taber abrasion amount as measured according to JIS K7204 was 25 mmg or less.

  As a result, the meandering-preventing member having a rectangular cross section obtained by extruding a thermoplastic elastomer resin as a material absorbs shearing force that repeatedly acts when driven along the curved surface of the driving roller 147 for a long time. In addition, the deformation due to the shearing force received by the base 1a when the meandering of the belt body 141a occurs is suppressed, and the meandering restricting action is exhibited for a long time.

  When the Taber abrasion amount of the base 1a is 20 mg or less, even if the rotation preventing driving is repeated with the meandering prevention member 1 fitted in the guide groove 147a, the wear of the meandering prevention member 1 is suppressed, and it takes a long time. The meandering control action is maintained.

"T-type peel strength"
5, the intermediate transfer belt 141 in Examples 1, 2, and 3 is a double-sided tape (8840ER manufactured by Dainippon Ink & Chemicals) as an adhesive member, and an adhesive (Super X No. 8008 manufactured by Cemedine). Any of Super Gold No. 777) has a T-type peel strength of 5 N / 5 mm or more.
In the T-type peel strength test, Examples 1, 2, and 3 both have a strength of 5 N / 5 mm or more as the T-type peel strength not only in a normal state but also after wet heat aging.
As a result, the meandering prevention member 1 is less likely to break due to the shearing force acting on the interface between the belt main body 141a and the meandering prevention member 1 when the intermediate transfer belt 141 is running, and the meandering prevention member can be driven even when driven for a long time. 1 is prevented from being displaced and peeled off.

In the intermediate transfer belt 141 of Comparative Examples 1 to 3 in which the meandering prevention member 1 not provided with the primer layer 1b is bonded, when a double-sided tape (8840ER manufactured by Dainippon Ink & Chemicals) is used as the bonding member AD, a comparative example is obtained. 2 (Estellar made by Aronkasei Co., Ltd.), the T-type peel strength after wet heat aging was 4.64 N / 5 mm, and the T-type peel strength was slightly lower than 1 N / mm, but all others were T-type As a result, the peel strength was 5 N / 5 mm or more.
On the other hand, when an adhesive (Super X No. 8008, Super Gold No. 777 manufactured by Cemedine Co., Ltd.) is used as the adhesive member AD, the T-type peel strength is significantly lower than 5 N / 5 mm, and sufficient adhesive strength is obtained. It was not obtained.

Further, in Comparative Example 3 using the meander prevention member 1 made of Rezamin P manufactured by Dainichi Seika Co., Ltd., which is a thermoplastic polyurethane elastomer resin, an adhesive (Super X No. 8008 manufactured by Cemedine Co., Ltd.) was used as the adhesive member AD. Even when Super Gold No. 777) was used, a strength of T-type peel strength after wet heat aging was 5 N / 5 mm or more, but in a normal state, the T-type peel strength was 5 N / 5 mm. The strength was significantly below, and sufficient adhesive strength could not be obtained.
Super X No. manufactured by Cemedine as an adhesive 8008, Super Gold No. 777 is a one-part room temperature moisture absorption fast-curing type, and in the normal state, the progress of cross-linking after curing is small. After moist heat aging, cross-linking proceeds by heating between the thermoplastic polyurethane and the adhesive. It is estimated that the T-type peel strength has increased.

"Emission evaluation of volatile organic solvents"
Fig. 6 shows liquefaction in a base 1a extruded with Hytrel manufactured by Toray DuPont and Estellar manufactured by Aronkasei Co., Ltd. as a solvent that does not contain toluene, with 50 parts by weight of each mixed with methylcyclohexane and butyl acetate. The diffusion amount of the volatile organic solvent of the meandering prevention member 1 in which the primer layer 1b is formed by applying 3M K type NT made of synthetic resin is shown.
Further, the substrate 1a on which the primer layer 1b is not formed, the volatile organic solvent of the meandering prevention member 1 in which the primer layer 1b is formed by applying 3M K-500 made of synthetic resin liquefied with toluene as a solvent. Also shows the amount of emissions.

  According to the emission amount of the volatile organic solvent shown in FIG. 6, a primer layer is applied by applying 3M K type NT made of synthetic resin liquefied with a solvent in which 50 parts by weight of methylcyclohexane and butyl acetate are mixed. The meandering prevention member 1 on which 1b was formed had a toluene emission amount substantially equivalent to that of the substrate 1a on which the primer layer 1b was not formed.

On the other hand, the meandering prevention member 1 in which the primer layer 1b is formed by applying a 3M company K type made of a synthetic resin liquefied with toluene as a solvent, dissipates toluene as compared with the substrate 1a on which the primer layer 1b is not formed. The amount increased. In particular, in the base 1a extruded by using Hytrel manufactured by Toray DuPont Co., Ltd., the amount of radiation increased by an order of magnitude.
In addition, in the meandering prevention member 1 in which the primer layer 1b is formed on the base body 1a extruded by using Aronkasei Co., Ltd. estelar as a material, either 3M K type NT or 3M K type is used. As a result, not only toluene but also methylcyclohexane and butyl acetate were suppressed.

The meandering-preventing member 1 according to the present embodiment is formed because the primer layer 1b is formed by liquefying a synthetic resin base material using a solvent not containing toluene and applying it to one surface of the substrate 1a. The residual amount of the volatile organic solvent in the primer layer 1b is reduced, and emission of this volatile component can be reduced.
Further, since the remaining volatile organic solvent is removed in the reduced rate drying region, a long drying process is not required, and deterioration of the adhesiveness between the belt main body 141a and the meandering prevention member 1 can be suppressed.

As mentioned above, although embodiment concerning this invention was explained in full detail, this invention is not limited to the said embodiment, A various change is made within the range of the summary of this invention described in the claim. Is possible.
For example, the intermediate transfer belt and the intermediate transfer type image forming apparatus using the intermediate transfer belt have been described as an example of the endless belt to which the meandering prevention member 1 according to the present embodiment is applied. The present invention can also be applied to the direct transfer type image forming apparatus used.

DESCRIPTION OF SYMBOLS 1 ... Meandering prevention member 1a ... Base | substrate 1b ... Primer layer 1c ... Release paper 100 ... Image forming apparatus 110 ... Exposure apparatus 120 ... Photoconductor unit 121 ... Photoconductor Drum 122 ... Charging roller 123 ... Housing 124 ... Cleaning device 125 ... Toner recovery auger 126 ... Cleaning blade 130 ... Developing device 131 ... Developing housing 132 ... Developing roller 133 ... Supply roller 140 ... Transfer device 141 ... Intermediate transfer belt 141a ... Belt body 142 ... Primary transfer roller 143 ... Secondary transfer belt 144 ... Secondary transfer roller 146 Backup roller 147: Driving roller 148: Suspension roller 150 ... Paper transport device 160 ... Chakusochi AD ··· adhesive

Claims (7)

A meander-preventing member provided by being bonded to the inner peripheral surface side of an endless belt body having flexibility,
A substrate obtained by extrusion molding using a thermoplastic elastomer resin as a material;
A primer layer made of a synthetic resin not containing toluene in a solvent, provided on one surface side of the substrate;
A meandering-preventing member characterized by the above. The synthetic resin includes chlorinated polypropylene, polymethylene polyphenyl isocyanate, 4,4-diphenylmethane diisocyanate,
The meandering-preventing member according to claim 1. T-peeling when one surface side provided with the primer layer is torn at a peeling speed of 100 mm / min according to JIS K6854-3, the base body bonded to the inner peripheral surface of the endless belt body through an adhesive member The strength is 5N / 5mm or more.
The meandering-preventing member according to claim 1 or 2, wherein The adhesive member is a double-sided tape in which a synthetic rubber-based adhesive is applied to both surfaces of the base material using a nonwoven fabric as a base material.
The meander-preventing member according to claim 3. The adhesive member includes an acrylic-modified silicone resin;
The meander-preventing member according to claim 3. Toluene emission amount is 0.05 μg / g or less,
The meander-preventing member according to any one of claims 1 to 5, wherein A thermoplastic elastomer resin is directly fed into an extruder, and a synthetic resin liquefied with a solvent is applied to one surface of a substrate to be extruded through a die provided in the extruder while being synchronized with extrusion. To form a primer layer,
A method for manufacturing a meandering prevention member.

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