JP2002182535A - Blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade having good adhesion property between a supporting sheet metal and a blade member although no primer treatment is performed. SOLUTION: The blade consists of a supporting sheet metal and a blade member adhered with an adhesive to the supporting sheet metal. The supporting sheet metal has an ether-ester urethane resin layer as a surface coating film. The adhesive is a polyester, urethane, polyamide, ethylene-vinyl acetate copolymer, acrylic or epoxy adhesive or a mixture adhesive of these and is directly applied on the surface coating film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for cleaning photoreceptors, belts, rollers, and the like in printers, copiers, and the like, thinning and preventing charging and dusting of toner in a developing section, and charging in a charging section. About the blade to be done.

[0002]

2. Description of the Related Art Conventionally, as a blade of this kind, a supporting sheet metal provided with a chromium alloy plating layer as a surface layer and a blade member made of urethane or the like adhered to the supporting sheet metal via an adhesive are known. Although chrome has a bad effect on the environment, it has a disadvantage that rust is easily generated when chromeless support sheet metal is used as it is, so in recent years, inorganic coating has been used as a surface coating instead of chromium. And a supporting sheet metal on which an organic film is formed, and various types of members having a blade member adhered to the supporting sheet metal have been developed.

By the way, when a blade member is bonded to a supporting sheet metal on which these coatings are formed via an adhesive, a satisfactory level of adhesion between the coating and the adhesive is often not obtained. In such a case, the bonded blade member is easily separated from the supporting metal plate, so that the supporting metal plate in the conventional blade is coated with a primer layer separately on the surface in order to improve the adhesiveness with the blade member, that is, In some cases, primer treatment has been performed.

[0004]

However, the separate primer treatment increases the number of steps in bonding the blade member, so that the bonding between the supporting sheet metal and the blade member becomes complicated, and the primer component In the case where harmful substances such as trichloroethylene and toluene are contained in the, there is also a problem that handling and management of the blade becomes difficult.

In view of the above-mentioned problems, the present invention has been made 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. I do.

[0006]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that an ether / ester urethane resin exhibits good adhesiveness with various adhesives. It was completed.

That is, a blade according to the present invention comprises a supporting metal plate and a blade member adhered to the supporting metal plate via an adhesive, wherein the supporting metal plate has an ether-ester urethane as a surface coating. A resin layer, wherein the adhesive is a polyester-based, urethane-based, polyamide-based, ethylene-vinyl acetate copolymer-based, acrylic-based, epoxy-based or a mixture thereof, and the surface coating (Claim 1).

In the blade having such a configuration,
Polyester-based, urethane-based, polyamide-based, ethylene-vinyl acetate copolymer-based, epoxy-based or epoxy-based adhesives exhibiting good adhesion to ether / ester-based urethane resins are used as surface coatings, that is, ether-ester-based adhesives. Since it is directly bonded to the urethane resin layer, the adhesion between the supporting metal plate and the blade member is good even though the primer treatment is not performed.

In the present invention, the ether / ester-based urethane resin is a compound containing an ether and an ester as a compound linked by a urethane bond between a polyol and an isocyanate. Examples thereof include KEN4-2002 and KCW manufactured by BAYER. And MP-105 and MP-185 manufactured by Dainippon Ink and Chemicals, and Superflex 300 and 36 manufactured by Daiichi Kogyo Seiyaku.

In the present invention, the polyester-based adhesive is an adhesive containing a polyester as an active ingredient, and includes, for example, a latex manufactured by Hitachi Chemical Co., Ltd. The urethane-based adhesive is an adhesive containing urethane as an active ingredient, and examples thereof include thermoplastic polyester-based polyurethane, thermoplastic polyether-based polyurethane, and thermosetting urethane resin. Specifically, UH-204 manufactured by Nippon Matai Co., Ltd. is used as a polyester-based urethane adhesive.
(Product name). The polyamide adhesive is an adhesive containing a polyamide as an active ingredient, and examples thereof include a thermoplastic polyamide-modified resin. Specifically, macromert 6240 manufactured by Henkel Japan Co., Ltd. obtained by modifying dimer acid with polyamide.
Can be mentioned. The ethylene-vinyl acetate copolymer-based adhesive is an adhesive containing a hydrolyzate of an ethylene-vinyl acetate copolymer as an active ingredient.
Duramin M-223 (trade name) and Takemelt C-1550 (trade name) manufactured by Takeda Pharmaceutical Co., Ltd., which are modified products of VA, can be mentioned. What is an epoxy adhesive?
An adhesive containing ethylene oxide as an active ingredient, for example, a one-part curing type Alteco EE (trade name) manufactured by Alpha Giken or a two-part curing type EP-001 (trade name) manufactured by Cemedine Industry Co., Ltd. ).

[0011] Further, as a supporting metal plate, a galvanized layer is provided on an iron steel plate as a substrate, and ether coating is performed as a surface coating without performing a chromate treatment on the galvanized layer.
Examples thereof include those provided with an ester-based urethane resin layer (chromium-free steel sheet) and those provided with an ether / ester-based urethane resin layer as a surface coating via a chemical conversion treatment such as chromate treatment on the galvanized layer. be able to. However, it is preferable to provide an ether / ester urethane resin layer without performing the chromate treatment. By not performing the chromate treatment, the risk that the environment is adversely affected by chromium contained in the chromate treatment film is reduced. In the present invention, examples of the blade member include those made of urethane resin, silicone resin, or fluorine resin.

Here, the urethane resin is MDI
(Methylene diisocyanate), TDI (toluene diisocyanate), NDI (naphthylene diisocyanate), IPDI (isophorone diisocyanate), PP
Polyisocyanates such as diisocyanates such as DI (paraphenylene diisocyanate) or modified products thereof, and polyester polyols such as polyethylene adipate, polybutylene adipate, polyethylene butylene adipate, polycaprolactone ester polyols, polybutadiene polyols, PPG (poly Polyols such as polyether polyols such as alkylene glycol) and PTMG (polytetramethylene ether glycol); 1,4-BG (butanediol);
Short-chain polyols such as P (trimethylolpropane), EG (ethylene glycol), DEG (diethylene glycol), bishydroxyethoxybenzene, or TEA
(Triethanolamine), TEDA (triethylenediamine), and MBOCA (methylenebis (o-chloroaniline)).

Examples of the silicone resin include methylvinylsilicone rubber, fluorinated silicone rubber and modified products thereof, and organic polysiloxanes such as silicone urethane composed of silicone-modified polyol.
Further, as the fluororesin, polyvinylidene fluoride,
Synthetic rubber containing fluorine, such as propylene-tetrafluoroethylene alternating copolymer, can be mentioned.

In the present invention, the ether / ester urethane resin layer contains a room temperature crosslinking type crosslinking agent and a heat sensitive type crosslinking agent.
What is heated at ° C is preferred. The cold crosslinking agent improves the cohesive force of the surface coating, and the heat-sensitive crosslinking agent crosslinks the surface coating with the adhesive by heating, so that the adhesiveness with the adhesive is further improved and the surface coating is broken. Is suppressed, and the possibility of separation 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 crosslinking type crosslinking agent is a crosslinking agent that promotes urethane crosslinking at room temperature. Examples of the room temperature crosslinking type crosslinking agent include epoxy resins and isocyanate resins. The resin is EPICLON CR-75 or CR5L manufactured by Dainippon Ink and Chemicals, Inc.
Examples of the isocyanate-based resin include CR-60N manufactured by Dainippon Ink and Chemicals, Inc. The heat-sensitive cross-linking agent is a cross-linking agent that promotes urethane cross-linking at 100 ° C to 200 ° C. Examples of the heat-sensitive cross-linking agent include blocked isocyanates. Elastron MF-
8, TP-16 and the like.

The amount of the crosslinking agent is preferably 1 to 10% by weight of a cold crosslinking agent and 5 to 40% by weight of a thermosensitive crosslinking agent in the ether / ester urethane resin layer. The adhesion amount (coating amount) of the ester-based urethane resin layer as a surface film was 0.1% in terms of solid content.
The range of 1 to 10 g / m ² is preferred. Within such a range, the adhesiveness will be more efficiently improved, and the possibility of separation between the supporting metal plate and the blade member is reduced.

The supporting plate metal and the blade member have a pressing pressure of more than 0 MPa and not more than 0.98 MPa (0 kgf) at the time of bonding via the adhesive applied in a liquid state.
/ Cm ^{2 and} less than 10 kgf / cm ² ), and are preferably 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 supporting sheet metal and the adhesive exhibit better adhesiveness, Further, the possibility of separation between the supporting metal plate and the blade member is reduced. The adhesive used here is of a type in which the supporting sheet metal and the blade member are adhered to each other after being applied in a liquid state.

Further, the supporting sheet metal and the blade member have a pressing force of 0.098 to 1.96 MPa at the time of bonding through the adhesive formed into a tape shape, and a pressing time of 0 second or more. It is preferable that they are pressed against each other for a long time within 60 seconds. By being pressed in such a range, the adhesive and the ether / ester urethane resin are physically and chemically bonded, and the supporting sheet metal and the adhesive are
As a result, better adhesion is exhibited, and the possibility of peeling between the supporting metal plate and the blade member is further reduced.
As the adhesive molded into a tape shape used here,
In general, a double-sided tape or a raw resin molded into a tape shape with resin applied to both sides of the base material of the tape, specifically,
A hot melt tape formed by molding a hot melt adhesive into a tape shape can be used. When using a hot melt tape as an adhesive formed into a tape shape, the hot melt tape is heated and melted at the time of bonding,
It is preferable that the pressing force is 0.098 to 0.98 MPa and the pressing time is 5 to 60 seconds. by this,
The support sheet metal and the adhesive further exhibit better adhesiveness, and the risk of separation between the support sheet metal and the blade member is further reduced.

As another solution, a blade according to the present invention comprises a supporting metal plate and a blade member bonded to the supporting metal plate via an adhesive, wherein the supporting metal plate has a surface coating. Wherein the adhesive is an acrylic adhesive and is directly adhered to the surface coating (claim 7).

In the blade having such a configuration,
An acrylic adhesive exhibiting good adhesion to the ether-ester urethane resin is directly adhered to the surface coating, that is, the ether-ester urethane resin layer. Without
Adhesion between the supporting metal plate and the blade member is improved. Here, the acrylic adhesive is an adhesive containing acrylic as an active ingredient, for example, Nitto N manufactured by Nitto Denko Corporation, which is an adhesive tape type (double-sided tape).
o. 500 (trade name).

Further, in the invention according to claim 7, the indicator sheet metal and the blade member are pressed with a pressing force of 0.098 at the time of bonding through the adhesive formed into a tape shape.
It is preferable that they are pressed against each other within a range of up to 1.96 MPa and a pressing time longer than 0 second and within 2 seconds. By being pressed in such a range, the supporting metal plate and the adhesive will exhibit better adhesiveness, and further,
The possibility of peeling between the supporting metal plate and the blade member is reduced. As the adhesive formed into a tape shape, generally, a double-sided tape (for example, the above-mentioned “No. 100” trade name, manufactured by Nitto Denko Corporation) or an acrylic resin in which an acrylic resin is applied to both sides of the tape base material, A tape-shaped product or the like can be used, and these are usually used without heating at the time of bonding.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below 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, a blade according to the present embodiment includes a blade member 1 that contacts a photosensitive drum, a transfer belt, a transfer roller 6, and the like.
Is adhered to a supporting metal plate 2 attached to a main body 3 of a printer or the like.

FIG. 2 is an enlarged view of a main part of a cross section taken along line AA of 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 supporting metal plate 2, a steel plate having a zinc-plated layer 2b provided on the surface of a steel substrate 2a and an ether / ester-based urethane resin layer 2c provided on the surface of the zinc-plated layer 2b is used. I have. On the surface of the ether / ester-based urethane resin layer 2c, for example, a urethane-based hot melt adhesive 4 is applied directly, that is, without passing through a primer layer. The blade member 1 is bonded.

As the blade member 1, for example, an elastic blade member made of polyester urethane rubber (trade name "Bancolan # 2566J", manufactured by Bando Chemical Co., Ltd.) is used. As the hot melt adhesive 4, a modified polyester urethane resin (trade name “BBC-10”, manufactured by Nippon Matai Co., Ltd.) is used.

[0025]

Embodiments of the present invention will be described below.Example 1 15% by weight of heat-sensitive cross-linking agent
Weight percent of cold-crosslinkable crosslinking agent
By applying a surface coating of polyester-urethane resin
Ether / ester urethane resin
Using a sheet metal having a layer as a support sheet metal,
Amide-based hot melt tape adhesive directly on the surface coating
(Thermoplastic polyamide adhesive (trade name "Macromelt
6238 ", manufactured by Henkel Japan Co., Ltd. (width 5 mm, thickness
100 μm hot melt tape) at 130 ° C.
Immediately after the temporary adhesion on the preheated sheet metal, polyester
Urethane rubber blade members (trade name "Bancolan"
# 2566J ", manufactured by Band Chemical Co., Ltd.)
160 ° C, pressing force 0.588MPa (6kgf / c
m ^Two), And press each other for 30 seconds to support the metal plate and blade
The members were bonded to obtain a blade of Example 1.

Comparative Example 1 A chromate-treated steel sheet was used instead of the supporting sheet metal of Example 1.
A blade of Comparative Example 1 was obtained in the same manner as in Example 1 except that a supporting metal plate coated with an ester-based urethane resin using isophorone diisocyanate as an isocyanate component was used.

Comparative Example 2 An electrogalvanized steel sheet was used instead of the supporting sheet metal of Example 1.
A blade of Comparative Example 2 was obtained in the same manner as in Example 1, except that a supporting metal plate coated with a surface coating of an ether urethane resin was used.

Comparative Example 3 An electrogalvanized steel sheet was used instead of the supporting sheet metal of Example 1.
A blade of Comparative Example 3 was obtained in the same manner as in Example 1, except that a supporting metal plate coated with a surface coating of an ester-based urethane resin was used.

Comparative Example 4 In place of the supporting sheet metal of Example 1, an electrogalvanized steel sheet was used.
A blade of Comparative Example 4 was obtained in the same manner as in Example 1, except that a supporting metal plate coated with a polyethylene urethane resin surface was used.

COMPARATIVE EXAMPLE 5 Comparative Example 5 was carried out in the same manner as in Example 1 except that an electrogalvanized steel sheet not coated with a chromate film or a resin was used as the supporting sheet metal in place of the supporting sheet metal of Example 1. The blade of Example 5 was obtained.

COMPARATIVE EXAMPLE 6 The same procedure as in Example 1 was carried out except that a primer (trade name “Chemrock 218”, manufactured by Road First Inc.) was applied to the support plate of Comparative Example 4 at a thickness of 1 μm. A blade of Comparative Example 6 was obtained.

<Test Example 1> Each of the obtained blades was
After aging at 1 ° C. for 1 hour, as shown in FIG. 3, a peeling tester applies a peeling load of 90 ° C. in the direction of the arrow at a speed of 20 mm / min, and a load when the blade member 1 and the supporting metal plate 2 peel off. Was measured. Note that the measurement is
The test was performed using a material cut to a width of 1 cm. The measurement results are shown in Table 1 below. In Table 1, the average adhesive strength is
Using 3 sample blades, start peeling each blade 2
The measurement was made at three places at 0 mm, at the center, and at 20 mm before the end of the peeling, and the average of the adhesive strength at nine places was determined (unit: N / cm). The min adhesive force is the minimum value of the adhesive force at nine places (unit: N / cm).

[0033]

[Table 1]

As is clear from Table 1, when the support sheet metal having the surface coating of the ether / ester urethane resin was used, the adhesion between the support sheet metal and the blade member was not achieved even though the primer sheet was not separately treated. It can be seen that the properties are good.

Examples 2 to 5 Example 2 was repeated 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. ~ 5 blades were obtained.

The average adhesive strength and the minimum adhesive strength (each unit is N / cm) of each blade were measured by the method shown in Test Example 1 above.

[0037]

[Table 2]

As is apparent from Table 2, the adhesiveness of the one using 1 to 4% by weight (particularly, 2 to 4% by weight) of the cold crosslinking type crosslinking agent and 10 to 15% by weight of the heat-sensitive crosslinking agent is higher. It turns out that it becomes favorable.

[0039]

As described above, the blade according to the present invention has an advantage that the adhesion between the supporting metal plate and the blade member is good even though the primer treatment is not separately performed.

[Brief description of the drawings]

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 in a cross section taken along line AA of FIG. 1;

FIG. 3 is a schematic side view showing a method of a peeling test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Blade member, 2 ... Support sheet metal, 4 ... Adhesive

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03G 15/08 504 C09J 201/00 4J040 // C09J 201/00 B29K 75:00 B29K 75:00 G03G 21 / 00318 (72) Inventor Takefumi Watase 2222-1 Ikeda, Onoe-cho, Kakogawa-shi, Hyogo Pref. Inside the steelworks (72) Inventor Susumu Nakawa 3-2-1-15 Meiwadori, Hyogo-ku, Kobe City, Hyogo Prefecture Inside Bando Chemical Co., Ltd. (72) Inventor Yuki Abe 3-2-1-15 Meiwadori, Hyogo-ku, Kobe City, Hyogo Prefecture Bando Chemical Co., Ltd. F term (reference) 2H003 BB11 CC04 EE16 2H034 AA06 BF01 BF03 BF06 2H077 AD13 AD17 AE03 FA13 FA16 4F2 11 AA16 AA31 AA33 AA45 AD03 AD20 AG03 TA03 TA04 TA05 TC02 TD11 TN46 TN47 TN49 TN56 4J004 AA07 AA09 AA13 AA14 AA15 AA16 AB01 AB03 AB05 BA02 CE01 EA05 FA08 4J040 DA051 DE031 EC031 EA06 MA EF111 MA03

Claims (8)

[Claims] 1. A blade comprising a supporting sheet metal and a blade member bonded to the supporting sheet metal via an adhesive, wherein the supporting sheet metal has an ether / ester urethane resin layer as a surface coating. The adhesive is a polyester-based, urethane-based, polyamide-based, ethylene-vinyl acetate copolymer-based, epoxy-based or a mixture thereof, and is directly adhered to the surface coating. Blade to do. 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 includes: A room temperature crosslinking type crosslinking agent and a heat sensitive type crosslinking agent are blended, and 100
The blade according to claim 1, wherein the blade is heated at a temperature of from −200 ° C. 3. The cold-crosslinkable crosslinking agent occupying 1 to 10% by weight in the ether / ester urethane resin layer,
3. The blade according to claim ² , wherein the heat-sensitive crosslinking agent is 5 to 40% by weight, and an adhesion amount of the ether / ester urethane resin layer is 0.1 to 10 g / m ² in solid content. 4. The support sheet metal and the blade member,
4. The method according to claim 1, wherein the pressing force is greater than 0 MPa and 0.98 MPa or less and the pressing time is in a range of 20 to 100 seconds with the adhesive applied in a liquid state. The blade described in Crab. 5. The support sheet metal and the blade member,
2. A pressing force of 0.098 to 1.96 MPa at the time of bonding and a pressing time longer than 0 second and within 60 seconds via the tape-shaped adhesive therebetween. A blade according to any one of claims 1 to 3. 6. The adhesive is a hot melt tape, which is heated and melted at the time of bonding, and the pressing force is 0.098 to
The blade according to claim 5, wherein the pressure is 0.98 MPa and the pressing time is 5 to 60 seconds. 7. 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 / ester urethane resin layer as a surface coating. The blade is characterized in that the adhesive is an acrylic adhesive and is directly adhered to the surface coating. 8. The indicator sheet metal and the blade member,
The blade according to claim 7, wherein the blades are pressed against each other with a pressing force of 0.098 to 1.96 MPa and a pressing time of more than 0 second and within 2 seconds at the time of bonding through the tape-shaped adhesive. .