WO2002052353A1

WO2002052353A1 - Blade

Info

Publication number: WO2002052353A1
Application number: PCT/JP2001/010964
Authority: WO
Inventors: Tadashige Nakamoto; Takeshi Watase; Atsushi Kihara; Susumu Nagawa; Yuki Abe
Original assignee: Bando Chemical Industries, Ltd.
Priority date: 2000-12-15
Filing date: 2001-12-13
Publication date: 2002-07-04
Also published as: JP3838873B2; CN1261834C; JP2002182535A; CN1432145A; TW561321B

Abstract

A blade comprising a supporting metal plate and a blade member bonded to the metal plate through an adhesive, characterized in that the supporting metal plate has an ether/ester type urethane resin layer as a surface coating and the adhesive is based on a polyester, urethane, polyamide, ethylene/vinyl acetate copolymer, acrylic, or epoxy or a mixture of two or more of these and is directly adherent to the surface coating.

Description

Blade Technical Field

INDUSTRIAL APPLICABILITY The present invention is used for cleaning of photoreceptors, belts, mouth rollers, etc., thinning of toner in a developing unit, prevention of electrification and smoke emission, electrification in a charging unit, etc. in printers and copiers. Blades. Background technology

Conventionally, this type of blade includes a supporting metal plate provided with a chromium alloy plating layer as a surface coating, and a blade member made of urethane or the like bonded to the supporting metal plate via an adhesive. Although chromium has a bad effect on the environment while using chromium-less support sheet as it is, it has the drawback that 錡 tends to occur easily. A support sheet metal provided with an organic coating is used, and various types of the support sheet metal having a blade member adhered thereto have been developed.

By the way, when a blade member is bonded to a supporting sheet metal having such a coating formed thereon with an adhesive, a satisfactory level of adhesion between the coating and the adhesive is often not obtained. In addition, since the adhesive is peeled off from the coating, the bonded blade member is easily peeled off from the supporting metal plate. In some cases, a primer is separately applied to the primer, that is, a primer treatment may be applied.

However, applying a separate primer treatment increases the number of steps in bonding the blade member, so that the bonding between the supporting metal plate and the blade member becomes complicated, and the primer component contains, for example, trichloroethylene, When toxic substances such as toluene are contained, there is also a problem that handling and management of the blade becomes difficult. I have.

Then, in view of the above-mentioned conventional problems, an object of the present invention is to provide a blade having good adhesion between a supporting metal plate and a blade member even though a primer treatment is not separately performed. , Disclosure of the invention

The present inventors have conducted intensive studies to solve the above problems, and as a result, have found that ether / ester-based polyurethane resins exhibit good adhesiveness with various adhesives, and have completed the present invention.

That is, a blade according to the present invention is a blade comprising a supporting metal plate and a blade member adhered to the supporting metal plate via an adhesive,

The support sheet metal is provided with an ether-ester urethane resin layer as a surface coating, and the adhesive is a polyester-based, urethane-based, polyamide-based, ethylene-vinyl acetate copolymer-based, acrylic, epoxy-based or a mixture thereof. A system adhesive, which is directly adhered to the surface coating.

In a blade having such a configuration, a polyester-based, urethane-based, polyamide-based, ethylene-vinyl acetate-copolymer-based, epoxy-based or epoxy-based adhesive exhibiting good adhesion with an ether / ester-based urethane resin is used. Since it is directly bonded to the surface coating, that is, the ether / ester-based urethane resin layer, the risk of peeling of the adhesive from the surface coating is reduced even though the primer treatment has not been performed. And good adhesion to the film.

In the present invention, the ether / ester-based urethane resin includes ether and ester as compounds linked by a urethane bond between a polyol and an isocyanate. Examples of the ether / ester-based urethane resin include BAYER KE N 4—200 and K CW, Dainippon Ink and Chemicals, Inc. MP—105 and MP—185, Daiichi Kogyo Pharmaceutical Superflex 300 and 3 6 mag. In the present invention, the polyester-based adhesive is an adhesive containing polyester as an active ingredient, and examples of the adhesive include latex manufactured by Hitachi Chemical Polymer Co., Ltd.

The urethane-based adhesive is an adhesive containing urethane as an active ingredient. Examples of the adhesive include thermoplastic polyester-based polyurethane, thermoplastic polyester-based polyurethane, and thermosetting urethane resin. Can be mentioned. Specifically, as the polyester-based urethane adhesive, UH-204 (trade name) manufactured by Nippon Matai Co., Ltd. can be mentioned.

The polyamide adhesive is an adhesive containing a polyamide as an active ingredient, and examples of the adhesive include a thermoplastic polyamide-modified resin. Specific examples include Macromelt 6240 manufactured by Henkel Japan Co., Ltd. obtained by modifying dimer acid with polyamide.

The ethylene-vinyl acetate copolymer adhesive is an adhesive containing a hydrolyzate of an ethylene-vinyl acetate copolymer as an active ingredient. Examples of the adhesive include Takeda, which is a modified product of saponified EVA. Duramin M-223 (trade name) and Kemert C-155 (trade name) manufactured by Yakuhin Kogyo Co., Ltd. can be mentioned.

Epoxy adhesives are adhesives containing ethylene oxide as an active ingredient. Examples of the adhesives include one-part curing type Alteco EE (trade name) manufactured by Alpha Giken and two-part curing type. EP-001 (trade name) manufactured by Cemedine Industry Co., Ltd.

Further, as a supporting metal plate, a zinc plating layer is provided on an iron steel plate as a substrate, and an ether / ester-based urethane resin layer is provided as a surface coating on the zinc plating layer without performing a chromate treatment. (A chromium-free steel sheet), or a layer in which an ether-ester resin layer is provided as a surface coating through a chemical conversion treatment such as a chromate treatment on the zinc plating layer. .

However, it is preferable that an ether-ester urethane resin layer is provided without being subjected to a chromate treatment. If the chromate treatment is not performed, the risk that the chromium contained in the chromate treatment will adversely affect the environment is reduced.

Examples of the blade member in the present invention include those made of urethane resin, silicone resin, or fluororesin.

Here, urethane resins include MDI (methylene diisocyanate), TDI (toluene diisocyanate), NDI (naphthylene diisocyanate), IPDI (isophorone diisocyanate), and PPD Diisocyanates such as I (paraphenylene diisocyanate) or polyisocyanates such as modified products thereof;

Polyethers such as polyethylene adipate, polybutylene adipate, polyester polyol consisting of polyethylene butylene adipate, polycaprolactone ester polyol, polybutadiene polyol, PPG (polyalkylene glycol), PTMG (polytetramethylene ether glycol) Polyols such as polyols,

1,4-BG (butanediol), TMP (trimethylolpropane), EG (ethylene glycol), DEG (diethylene glycol), short-chain polyols such as bishydroxyethobenzene, or TEA Examples include amines such as ethanolamine), TEDA (triethylenediamine), and MBOCA (methylenebis (o-chloroaniline)).

Examples of the silicone resin include methyl vinyl silicone rubber, fluorinated silicone rubber and modified products thereof, and organic polysiloxanes such as silicone urethane composed of silicone-modified polyol.

Further, examples of the fluorine resin include synthetic rubbers containing fluorine such as polyvinylidene fluoride and propylene-tetrafluoroethylene alternate copolymer.

Further, in the present invention, the ether / ester-based urethane resin layer is blended with a normal-temperature crosslinking type crosslinking agent and a heat-sensitive type crosslinking agent. Those heated at 200 ° C. are preferred.

The cold crosslinking agent enhances the cohesive strength of the surface coating, and the heat-sensitive crosslinking agent crosslinks the surface coating with the adhesive by heating, thereby further improving the adhesiveness with the adhesive. Breakage of the surface coating is suppressed, and the risk of peeling between the supporting metal plate and the blade member is further reduced.

As the adhesive used in this case, a hot-melt adhesive that melts at the bonding temperature is preferable in terms of handling and adhesive strength.

Here, the room temperature cross-linking agent is a cross-linking agent that promotes urethane cross-linking at room temperature (for example, a temperature of 0 ° C. or higher, preferably 10 to 40 ° C.). Epoxy resins, isocyanate resins and the like. Epoxy resins include EP I CLON CR-75 and CR5L manufactured by Dainippon Ink and Chemicals, and isocyanate resins. Examples include Nippon Ink and Chemicals' CR-6ON.

The heat-sensitive crosslinking agent is a crosslinking agent that promotes urethane crosslinking at 100 ° C. to 200 ° C. Examples of the heat-sensitive crosslinking agent include block isocyanate and block isocyanate. Examples thereof include Elastron MF-8 and TP-16 manufactured by Daiichi Kogyo Seiyaku.

The mixing amount of these crosslinking agents is preferably 1 to 10% by weight of a room temperature crosslinking type crosslinking agent, and 5 to 40% by weight of a heat-sensitive type crosslinking agent in a proportion of the ether / ester type urethane resin layer. The adhesion amount (application amount) of the resin layer as a surface coating is preferably in the range of 0.1 to: L 0 gZm ^{2 in} terms of solid content.

Within such a range, the adhesiveness will be improved more efficiently, and the possibility of peeling between the supporting metal plate and the blade member due to the peeling of the surface coating and the adhesive is reduced.

Wherein the supporting plate and the blade member, said applied in liquid form via between the adhesive, pressure press at the time of bonding is greater than the OMP a 0. 98 MP a following (0 kgf / cm greater than ² 10 kg f / cm ² or less) and are preferably pressed (that is, pressed) against each other within a pressure range of 20 to 100 seconds. By being pressed in such a range, the adhesive and the ether / ester-based urethane resin are physically and chemically bonded, and the support sheet metal and the adhesive exhibit better adhesiveness. As a result, the risk of peeling between the supporting sheet metal and the blade member is further reduced.

The adhesive used here is of a type in which the supporting metal plate and the blade member are adhered to each other after being applied in a liquid state.

In addition, the supporting metal plate and the blade member have a pressing force of 0.098 to 1.96 MPa at the time of bonding with the adhesive formed into a tape shape therebetween, and a pressing time of 0. It is preferable that they are pressed against each other in a range longer than 60 seconds and within 60 seconds.

By being pressed in such a range, the adhesive and the ether / ester-based urethane resin are physically and chemically bonded to each other, so that the support sheet metal and the adhesive exhibit better adhesiveness. This further reduces the risk of separation between the supporting metal plate and the blade member.

The tape-shaped adhesive used here is generally a double-sided tape in which resin is applied to both sides of the base material of the tape, or a tape-shaped raw material resin, specifically hot-melt adhesive. Hot melt tape in which the agent is formed into a tape shape can be used.

When a hot melt tape is used as the adhesive formed into a tape shape, the hot melt tape is heated and melted at the time of adhesion, the pressing force is 0.098 to 0.98 MPa, and the pressing time is It is preferable that the time is set to 5 to 60 seconds. With this, the support sheet metal and the adhesive exhibit even better adhesiveness, and the risk of separation between the support sheet metal and the blade member is further reduced.

Further, as another solution, a blade according to the present invention is a blade comprising a supporting metal plate and a blade member bonded to the supporting metal plate via an adhesive, wherein the supporting metal plate has an ether film as a surface coating. The adhesive may include an ester-based urethane resin layer, and the adhesive may be an acrylic adhesive and directly adhered to the surface coating. In the blade having such a configuration, an acrylic adhesive exhibiting good adhesiveness with the ether / ester urethane resin is directly bonded to the surface coating, that is, the ether / ester urethane resin layer. Although the primer treatment is not performed, the adhesion between the supporting metal plate and the blade is improved.

Here, the acrylic adhesive is an adhesive containing acrylic as an active ingredient, and the adhesive is, for example, an adhesive tape type (double-sided tape) knit one manufactured by Nitto Denko Corporation. 5 0 0 (product name).

Further, in the above configuration, the supporting sheet metal and the blade member may have a pressing force of 0.098 to 1.96 MPa and a pressing force during bonding via the adhesive formed in a tape shape. It is preferable that the pressing times be longer than 0 second and within 2 seconds. By being pressed in such a range, the support sheet metal and the adhesive exhibit better adhesiveness, and the risk of separation between the support sheet metal and the blade member is further reduced.

As the adhesive formed into a tape shape, generally, a double-sided tape in which an acrylic resin is applied to both sides of the base material of the tape (for example, the above “No. 100” trade name, manufactured by Nitto Denko Corporation) And acrylic resin molded in a tape shape can be used. These are usually used without heating at the time of bonding. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic sectional view showing an example of a use state of a blade.

FIG. 2 is an enlarged view of a main part along a line AA in FIG.

FIG. 3 is a schematic side view showing a peeling test method. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic sectional view showing an example of a use state of the blade of the present invention.

As shown in FIG. 1, the blade of this embodiment includes a photosensitive drum, a transfer belt, and a transfer port. —A blade member 1 that comes into contact with the rubber 6 or the like is bonded to a supporting metal plate 2 attached to the main body 3 of the pudding or the like.

FIG. 2 is an enlarged view of a main part along a line AA in FIG.

As shown in FIG. 2, the supporting metal plate 2 and the blade member 1 are bonded with a hot melt adhesive 4.

As the support metal plate 2, a zinc plating layer 2b is provided on a surface of a steel substrate 2a, and a polyester-ester urethane resin layer 2 is formed on the surface of the zinc plating layer 2b as a surface coating. The one provided with c is used.

On the surface of the ether / ester-based urethane resin layer 2c, for example, a resin-based hot-melt adhesive 4 is applied directly, that is, without passing through a primer layer. The supporting metal plate 2 and the blade member 1 are bonded.

As the blade member 1, for example, an elastic blade member made of polyester urethane rubber (trade name “Bancolan # 25666JJ, manufactured by PAND-Ichi Chemical Co., Ltd.)” is used.

As the hot melt adhesive 4, a modified polyester urethane resin (trade name "BBC-10", manufactured by Matthew Matai Co., Ltd.) is used.

Example

Hereinafter, examples of the present invention will be described.

Example 1

By applying a surface coating of an ether-ester urethane resin to which 15% by weight of a thermosensitive crosslinking agent and 4% by weight of a room-temperature crosslinking agent are added to an electric zinc plated steel sheet, an ether-ester is formed as a surface coating. Amide-based hot-melt tape adhesive (thermoplastic polyamide-based adhesive (trade name “Macromelt 6238”, manufactured by Henkel Japan Ltd.)) mm, hot-melt tape with a thickness of 100) was temporarily pre-adhered directly to the surface coating on the supporting metal plate pre-heated at 130, and immediately thereafter, a polyester-based polyurethane rubber blade member (trade name “ Bancolan # 2 5 6 6 J ", manufactured by Bando Chemical Co., Ltd.) The blades of Example 1 were obtained by pressing each other for 30 seconds at a temperature of 160 ° C. and a pressing force of 0.588 MPa (6 kgf Zcm ² ) to bond the supporting metal plate and the blade member.

Comparative Example 1

Instead of the supporting sheet metal of Example 1, a supporting sheet metal having a surface coating of an ester-based urethane resin using isophorone diisocyanate as an isocyanate component was used for a chromate-treated steel sheet, and By the same method, a blade of Comparative Example 1 was obtained.

Comparative Example 2

The blade of Comparative Example 2 was replaced with the blade of Comparative Example 2 in the same manner as in Example 1 except that the supporting sheet metal of Example 1 was used instead of the supporting sheet metal of electro-zinc plating steel sheet. Obtained.

Comparative Example 3

The blade of Comparative Example 3 was replaced with the blade of Comparative Example 3 in the same manner as in Example 1, except that the supporting sheet metal of Example 1 was used instead of the supporting sheet metal of Example 1. Obtained.

Comparative Example 4

The blade of Comparative Example 4 was obtained by the same method as in Example 1 except that the supporting sheet metal of Example 1 was used instead of the supporting sheet metal of Example 1, except that a supporting sheet metal having a surface coating of a polyethylene-based urethane resin was used on an electric zinc plated steel sheet. Was.

Comparative Example 5

The blade of Comparative Example 5 was produced in the same manner as in Example 1 except that an electro-zinc plating steel sheet not coated with a chromate film or a resin was used as the supporting sheet metal instead of the supporting sheet metal of Example 1. I got

Comparative Example 6

Comparative Example 4 was repeated in the same manner as in Example 1, except that a primer (trade name “Chemrock 218” manufactured by Loadfast Incorporated) was applied to the supporting metal plate of 1 m thickness. The blade of Example 6 was obtained. <Test Example 1>

After each obtained blade was aged at 23 ° C for 1 hour, a peeling load of 90 ° C was applied at a speed of 2 Omm / min in the direction of the arrow as shown in Fig. The load when the blade member 1 and the supporting metal plate 2 were peeled off was measured. In addition, the measurement was performed by using a material whose width (X width) was cut to 1 cm.

The measurement results are shown in Table 1 below.

The average adhesive force in Table 1 was measured using three sample blades, and measured at three places at 20 mm, the center, and 2 Omm before the end of peeling of each blade. (Unit: N / cm). The min adhesive force is the minimum value of the adhesive force at 9 places (unit: NZcm

(Unit: N / cm) As can be seen from Table 1, the support sheet metal with a surface coating of ether-ester urethane resin has the same properties as the support sheet metal even though it is not separately treated with primer. It can be seen that the adhesion to the blade member is good.

Examples 2 to 5

The blades of Examples 2 to 5 were obtained in the same manner as in Example 1, except that the amounts of the heat-sensitive crosslinking agent and the cold crosslinking agent used in Example 1 were changed to the amounts shown in Table 2 below. The obtained blades were measured for the average adhesive force and min adhesive force (unit: NZ cm) by the method shown in Test Example 1 above. Table 2

(Unit N / cm)

'' As is clear from Table 2, adhesives using 1 to 4% by weight (particularly 2 to 4% by weight) of a cold crosslinking agent and 10 to 15% by weight of a heat-sensitive crosslinking agent have poor adhesion. It turns out that it becomes better.

Claims

The scope of the claims

1. A blade comprising a supporting metal plate and a blade member bonded to the supporting metal plate via an adhesive,

The support sheet metal has a polyester-ester urethane resin layer as a surface coating, and the adhesive is a polyester-based, urethane-based, polyamide-based, ethylene acetate biel copolymer-based, epoxy-based, or a mixture thereof. A blade directly adhered to the surface coating with the adhesive.

2. The adhesive is a polyester-based, urethane-based, polyamide-based, ethylene vinyl acetate copolymer-based, epoxy-based or a mixture thereof, and the ether-ester-based urethane resin layer is at room temperature. 2. The blade according to claim 1, wherein a cross-linking type cross-linking agent and a heat-sensitive type cross-linking agent are compounded, and the blade is heated at 100 to 200 at the time of bonding.

3. The cold crosslinking agent occupies 1 to 10% by weight and the heat-sensitive crosslinking agent occupies 5 to 40% by weight in the ether / ester urethane resin layer. The ether / ester urethane resin The blade according to claim ² , wherein the coating amount of the layer is 0.1 to 10 gZm ² in solid content.

4. The pressing force is greater than OMPa and less than 0.98 MPa when bonding, and the pressing time is 2 4. The blade according to claim 1, wherein the blades are pressed against each other within a range of 0 to 100 seconds.

5. The pressing force at the time of bonding is 0.098 to 1.96 MPa, and the pressing time is 0, with the support sheet metal and the blade member interposed between the adhesive formed into a tape shape. The blade according to any one of claims 1 to 3, wherein the blades are pressed against each other in a range longer than 60 seconds and within 60 seconds.

6. The adhesive is a hot melt tape, which is heated and melted at the time of bonding, the pressing force is 0.998 to 0.98 MPa, and the pressing time is 5 to 60 seconds. The blade of the description.

7. A blade comprising a supporting metal plate and a blade member bonded to the supporting metal plate via an adhesive,

A blade, wherein the supporting metal plate includes an ether / ester-based urethane resin layer as a surface coating, and the adhesive is an acrylic adhesive and directly adhered to the surface coating.

8. The pressing sheet has a pressing force of 0.098 to 1.96 MPa and a pressing time longer than 0 second at the time of bonding, with the indicating sheet metal and the blade member interposed between the adhesive formed into a tape shape. 8. The blade according to claim 7, wherein the blades are pressed against each other within a range of 2 seconds or less.