Toner seal member, toner cartridge, and method for manufacturing toner seal member

Abstract

Provided is a toner seal member which exhibits excellent performance.　A toner seal member (10) comprises a foam layer (20) and a coating layer (30), the coating layer (30) being exposed. The coating layer (30) is based on polyol, isocyanate, and a photopolymerizable monomer having a hydroxyl group.

Description

Technical Field

[0001] The present disclosure relates to a toner seal member and a toner cartridge.

Background Art

[0002] Patent Document 1 discloses a seal member including a sheet-like elastic member and a coating layer. Patent Document 2 discloses a toner seal member including a urethane foam layer and a urethane film layer.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, various performances have been required for toner seal members, and the requirements have become stricter. An object of the present disclosure is to provide a toner seal member having excellent performance. The present disclosure can be realized in the following forms.

Means for Solving the Problems

[0005] 〔1〕A toner seal member including a foam layer and a coating layer, wherein the coating layer is exposed, The coating layer is a toner seal member made from a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group as raw materials.

Effects of the Invention

[0006] According to the present disclosure, a toner seal member with excellent performance can be provided.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0008] Here, desirable examples of the present disclosure are shown. 〔2〕A toner cartridge having the toner seal member described in 〔1〕.

[0009] Hereinafter, the present disclosure will be described in detail. In this specification, for a description using "-" for a numerical range, unless otherwise specified, it includes the lower limit value and the upper limit value. For example, in the description of "10 - 20", both the lower limit value "10" and the upper limit value "20" are included. That is, "10 - 20" has the same meaning as "10 or more and 20 or less".

[0010] 1. Toner Seal Member FIG. 1 is a cross-sectional view of a toner seal member 10 according to an embodiment. The toner seal member 10 includes a foam layer 20 and a coating layer 30. In the toner seal member 10, the coating layer 30 is exposed. For example, the toner seal member 10 is a laminate of the foam layer 20 and the coating layer 30. For example, the coating layer 30 is a skin layer.

[0011] [Foam Layer] The foaming layer 20 is composed of, for example, a synthetic resin foam or the like. The foaming layer 20 is, for example, a polyurethane foam; a polyolefin foam such as a polyethylene foam or a polypropylene foam; a polystyrene foam; a polyamide foam; a polyester foam such as a polyethylene terephthalate (PET) foam or a polybutylene terephthalate (PBT); a (meth)acrylic foam; a phenol foam; a polyvinyl chloride foam; a polyimide foam; a silicone resin foam; a urea resin foam; a melamine resin foam; an ethylene propylene diene rubber (EPDM) foam; a styrene butadiene rubber (SBR) foam; a nitrile butadiene rubber (NBR) foam; an ethylene-vinyl acetate copolymer (EVA) foam; an ethylene-acrylic acid copolymer foam; an ethylene-ethyl acrylate copolymer (EEA) foam; and the like. Among these foams, a polyurethane foam is more preferable from the viewpoint of adhesion to the coating layer.

[0012] [Coating layer] The coating layer 30 is made from a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group as raw materials. The coating layer 30 can be formed on the surface of the foaming layer 20 using a composition containing a urethane prepolymer obtained by reacting a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group.

[0013] The urethane prepolymer is a urethane prepolymer having a photoreactive group at the terminal and containing a polyester bond in the polymer skeleton. Here, the photoreactive group is a functional group that can be crosslinked by irradiation with X-rays, electron beams, ultraviolet rays, visible light, or the like. More specifically, the urethane prepolymer is obtained by reacting a reaction product of a polyisocyanate and a polyol with a photoreactive group-containing compound (a compound having a photoreactive group capable of reacting with the terminal of the reaction product). Hereinafter, various raw materials used in manufacturing the urethane prepolymer will be described.

[0014] [Polyol] The polyol is not particularly limited. It is preferable that at least one of a polyester polyol and a polycarbonate polyol is included.

[0015] The polyester polyol is an aliphatic dicarboxylic acid (such as succinic acid, adipic acid, sebacic acid, azelaic acid, etc.), an aromatic dicarboxylic acid (such as phthalic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, etc.), an alicyclic dicarboxylic acid (such as hexahydrophthalic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, etc.), or an acid ester or acid anhydride thereof, and ethylene glycol, 1,3 - propylene glycol, 1,2 - propylene glycol, 1,3 - butanediol, 1,4 - butanediol, 1,5 - pentanediol, 1,6 - hexanediol, 3 - methyl - 1,5 - pentanediol (MPD), neopentyl glycol, 1,8 - octanediol, 1,9 - nonanediol, etc., or a polyester polyol such as polypropylene glycol obtained by a dehydration condensation reaction with these mixtures; polycaprolactone, polylactone diol obtained by ring - opening polymerization of lactone monomers such as methylvalerolactone, etc. can be mentioned.

[0016] The polyester polyol is preferably one obtained by a condensation reaction of 3 - methyl - 1,5 - pentanediol (MPD) and terephthalic acid, or one obtained by a condensation reaction of 3 - methyl - 1,5 - pentanediol (MPD) and adipic acid.

[0017] Next, the polycarbonate polyol will be described. The polycarbonate polyol is preferably a polycarbonate diol. The polycarbonate diol can be obtained, for example, by reacting a diol component with a carbonylating agent. Examples of the diol component include aliphatic diols, alicyclic diols, ester diols, aromatic diols, and the like. Examples of the aliphatic diol include 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,4-butanediol, diethylene glycol, and the like, and one or more of these may be used in combination. Examples of the alicyclic diol include 1,4-cyclohexanediol. Examples of the ester diols include bis(hydroxyethyl) terephthalate. Examples of the aromatic diol include aromatic diols such as alkylene oxide adducts of bisphenol A. Examples of the carbonylating agent include diethyl carbonate, ethylene carbonate, propylene carbonate, dimethyl carbonate, dibutyl carbonate, diphenyl carbonate, diphenyl carbonate, phosgene, and the like.

[0018] The polycarbonate polyol is preferably obtained by reacting 3-methyl-1,5-pentanediol (MPD), 1,6-hexanediol, and diethyl carbonate. The ratio of 3-methyl-1,5-pentanediol (MPD) to 1,6-hexanediol is preferably 9.5:0.5 - 8:2, more preferably 9:1.

[0019] The polyol preferably includes those obtained by the condensation reaction of 3-methyl-1,5-pentanediol (MPD) and adipic acid.

[0020] The hydroxyl value of the polyol is preferably 10 - 1000 mgKOH / g, more preferably 20 - 500 mgKOH / g, and even more preferably 30 - 300 mgKOH / g. Here, the hydroxyl value is a value measured according to JIS-K0070.

[0021] When the total of the polyol, isocyanate, and the photopolymerizable monomer having a hydroxyl group is 100 parts by mass, the polyol is preferably 50 to 90 parts by mass, more preferably 55 to 85 parts by mass, and still more preferably 60 to 80 parts by mass.

[0022] [Isocyanate] Isocyanate (polyisocyanate) is a compound having a plurality of isocyanate groups. For example, aromatic isocyanates such as 4,4-diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI), 1,5-naphthalene diisocyanate (NDI), triphenylmethane triisocyanate, xylylene diisocyanate (XDI), alicyclic isocyanates such as isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate, aliphatic isocyanates such as hexamethylene diisocyanate (HDI), or modified isocyanates such as free isocyanate prepolymers obtained by the reaction of these with polyols, carbodiimide-modified isocyanates, etc. can be used. Further, only one of these isocyanates may be contained, or two or more thereof may be combined and contained.

[0023] As the isocyanate, any of aromatic, alicyclic, and aliphatic isocyanates may be used, and it may be a bifunctional isocyanate having two isocyanate groups in one molecule, or a trifunctional or higher-functional isocyanate having three or more isocyanate groups in one molecule, and these may be used alone or in combination of a plurality. For example, bifunctional isocyanates include aromatic ones such as 2,4-tolylene diisocyanate (TDI), 2,6-tolylene diisocyanate (TDI), m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate (MDI), 2,4'-diphenylmethane diisocyanate (MDI), 2,2'-diphenylmethane diisocyanate (MDI), xylylene diisocyanate, 3,3'-dimethyl-4,4'-biphenylene diisocyanate, 3,3'-dimethoxy-4,4'-biphenylene diisocyanate; alicyclic ones such as cyclohexane-1,4-diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, methylcyclohexane diisocyanate; and aliphatic ones such as butane-1,4-diisocyanate, hexamethylene diisocyanate, isopropylene diisocyanate, methylene diisocyanate, lysine isocyanate. In addition, polyfunctional isocyanates with two or more functional groups include polymethylene polyphenyl isocyanate (polymeric MDI). Polyfunctional isocyanates with three or more functional groups include 1-methylbenzene-2,4,6-triisocyanate, 1,3,5-trimethylbenzene-2,4,6-triisocyanate, biphenyl-2,4,4'-triisocyanate, diphenylmethane-2,4,4'-triisocyanate, methyldiphenylmethane-4,6,4'-triisocyanate, 4,4'-dimethyldiphenylmethane-2,2',5,5'-tetraisocyanate, triphenylmethane-4,4',4''-triisocyanate, etc. Also, the isocyanate is not limited to one type and may be one or more types. For example, one type of aliphatic isocyanate and two types of aromatic isocyanates may be used in combination. In addition, the number of functional groups of the isocyanate preferably ranges from 2.0 to 2.8.

[0024] Note that the isocyanate index (INDEX) of the urethane prepolymer is preferably 80 - 150, more preferably 90 - 130. The isocyanate index is the equivalent ratio of the isocyanate groups of the isocyanate to the reactive groups such as hydroxyl groups that can react with the isocyanate in the polyols and the photopolymerizable monomers having hydroxyl groups. Therefore, when the value is less than 100, it means that the reactive groups such as hydroxyl groups are in excess of the isocyanate groups, and when it exceeds 100, it means that the isocyanate groups are in excess of the reactive groups such as hydroxyl groups.

[0025] When the total of the polyol, the isocyanate, and the photopolymerizable monomer having a hydroxyl group is 100 parts by mass, the isocyanate is preferably 5 parts by mass or more and 30 parts by mass or less, more preferably 10 parts by mass or more and 25 parts by mass or less, and still more preferably 15 parts by mass or more and 20 parts by mass or less.

[0026] [Photopolymerizable monomer having a hydroxyl group] The photopolymerizable monomer having a hydroxyl group is a compound having a photoreactive group capable of reacting with the isocyanate. Examples of the "photoreactive group" include an alkenyl group, an alkynyl group, a vinyl group, an acrylic group, a methacrylate group, an allyl group, etc. The "photoreactive group" preferably contains an ethylenically unsaturated bond (-C=C-). As such a "photoreactive group", a methacrylate group (CH2=C(CH3)-COO-) and an acrylate group (CH2=CH-COO-) are suitable.

[0027] A photopolymerizable monomer having a hydroxyl group is a compound having one or more hydroxyl groups in one molecule. Examples thereof include monomers having an allyl ether group such as allyl ether glycol and hydroxyethyl allyl ether, monomers having a vinyl ether group such as 2-hydroxyethyl vinyl ether, diethylene glycol monovinyl ether, and 4-hydroxybutyl vinyl ether, and monomers having a (meth)acrylate group such as hydroxyethyl acrylate, hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, and 2-hydroxypropyl methacrylate. Note that “(meth)acrylate” means acrylate and / or methacrylate. The alkyl (meth)acrylate having a hydroxyl group as a photopolymerizable monomer may be used alone or in combination of two or more kinds.

[0028] As the photopolymerizable monomer having a hydroxyl group, hydroxyethyl (meth)acrylate is preferable, and 2-hydroxyethyl acrylate (HEA) is more preferable.

[0029] When the total of the polyol, isocyanate, and the photopolymerizable monomer having a hydroxyl group is 100 parts by mass, the photopolymerizable monomer having a hydroxyl group is preferably 2 to 30 parts by mass, more preferably 5 to 25 parts by mass, and still more preferably 8 to 20 parts by mass.

[0030] [Initiator] The composition may contain an initiator used in a photopolymerization reaction. Examples of the initiator include compounds such as acetophenone-based, benzophenone-based, thioxanthone-based compounds. Examples of acetophenone-based compounds include 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]phenyl}-2-methyl-propan-1-one, 1-[4-(2-hydroxyethoxy)phenyl]-2-hydroxy-2-methyl-1-propan-1-one, 2,2-dimethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, 4-(1-t-butyldioxy-1-methylethyl)acetophenone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethylketal, 4-(2-hydroxyethoxy)phenyl-(2-hydroxy-2-propyl)ketone, 1-hydroxycyclohexylphenylketone, 2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone oligomer, and the like.

[0031] Examples of benzophenone-based compounds include 4-(1-t-butyldioxy-1-methylethyl)benzophenone, 3,3’,4,4’-tetrakis(t-butyldioxycarbonyl)benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4’-methyl-diphenyl sulfide, 3,3’,4,4’-tetra(t-butylperoxylcarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, 4-benzoyl-N,N-dimethyl-N-[2-(1-oxo-2-propenyloxy)ethyl]benzenemethanaminium bromide, (4-benzoylbenzyl)trimethylammonium chloride, and the like. Examples of thioxanthone-based compounds include 2,4-dimethylthioxanthone, 2,4-diisopropylthioxanthone, 2-chlorothioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, 2-(3-dimethylamino-2-hydroxy)-3,4-dimethyl-9H-thioxanthone-9-one mesochloride, and the like.

[0032] [Monomer] The composition may contain a photopolymerizable monomer. Examples of the monomer include compounds having an alkenyl group, alkynyl group, vinyl group, acrylic group, methacrylate group, allyl group, and the like. Examples of the monomer include ethyl (meth)acrylate, methyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, sec-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-octyl (meth)acrylate, tridecyl (meth)acrylate, cyclohexyl (meth)acrylate, n-lauryl (meth)acrylate, dodecyl (meth)acrylate, stearyl (meth)acrylate, isobornyl methacrylate, and the like. The monomer is preferably a compound having one or more ethylenically unsaturated groups in the molecule.

[0033] When the total of the polyol, isocyanate, and the photopolymerizable monomer having a hydroxyl group is 100 parts by mass, the monomer is preferably 5.0 parts by mass or more and 60.0 parts by mass or less, more preferably 10.0 parts by mass or more and 50.0 parts by mass or less, and still more preferably 20.0 parts by mass or more and 40.0 parts by mass or less.

[0034] [Other components] The composition may contain other components other than the above as required. Examples of the other components include tackifiers, curing accelerators, fillers, coupling agents, rust preventives, antioxidants, ultraviolet absorbers, thickeners, plasticizers, antibacterial agents, and colorants.

[0035] [Elongation of the coating layer 30] The elongation of the coating layer 30 is measured by a tensile test in accordance with JIS K 6251 2010, and is preferably 5% or more, more preferably 10% or more, and still more preferably 15% or more.

[0036] [Tensile strength of the coating layer 30] The tensile strength of the coating layer 30 is measured by a tensile test in accordance with JIS K 6251 2010, and is preferably 5 N / mm 2 or more, more preferably 10 N / mm 2 or more, and still more preferably 15 N / mm 2 or more.

[0037] 2. Manufacturing method of the toner seal member The manufacturing process of the toner seal member 10 includes an adhesion step of attaching the raw material of the coating layer 30 to the foam layer 20, and an irradiation step of irradiating light to the raw material attached in the adhesion step to cure the raw material by a photopolymerization reaction.

[0038] Specifically, the above-described composition (mixed raw material) for the coating layer 30 is applied to the surface of the foam layer 20 using, for example, a gravure coater, and after application, it is irradiated with ultraviolet rays to be cured (reacted).

[0039] The coating layer 30 is formed on the surface of the foaming layer 20, for example, by using a composition obtained by synthesizing a urethane prepolymer from a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group, and then mixing an initiator, a monomer, and the like.

[0040] Known methods can be used for the synthesis of the urethane prepolymer. For example, a compound having two or more hydroxyl groups at its terminal such as a polyol is charged into a closed reaction kettle equipped with a stirrer, a condenser, a vacuum dehydration device, and a nitrogen gas flow device, dehydrated under reduced pressure, and then an isocyanate is added and reacted at 70°C - 100°C for 3 hours - 8 hours under a nitrogen gas stream. In the synthesis of the urethane prepolymer, a urethanization catalyst such as an organotin compound or an amine may be used as necessary.

[0041] It should be noted that the various numerical ranges described in the specification can be arbitrarily combined with their upper and lower limit values respectively, and all such combinations are described in this specification as preferred numerical ranges.

[0042] 3. Toner Cartridge FIG. 2 is a partial cross-sectional view of a toner cartridge 50 according to an embodiment. The toner cartridge 50 has a container 60, a shutter 70, and toner seal members 110, 210. The toner seal members 110, 210 correspond to an example of the toner seal member 10. The toner seal members 110, 210 are provided with a foaming layer and a coating layer having the same configuration as the foaming layer 20 and the coating layer 30 of the toner seal member 10. The container 60 stores toner. The container 60 includes a toner storage portion 62 and a discharge portion 64. The toner storage portion 62 stores toner. The toner storage portion 62 is cylindrical and is rotatably connected to the discharge portion 64. The discharge portion 64 is provided with a discharge port 66 for discharging toner.

[0043] The shutter 70 is slidably supported by the discharge portion 64 near the discharge port 66 along the outer surface of the discharge portion 64. A toner seal member 110 is assembled to the shutter 70. The toner seal member 110 is disposed on the discharge portion 64 side with respect to the shutter 70. The coating layer (refer to the coating layer 30 in FIG. 1) is disposed so as to be exposed on the outer surface side of the discharge portion 64.

[0044] As shown in FIGS. 2 and 3, the toner seal member 110 slides along the outer surface of the discharge portion 64 as the shutter 70 slides. When the shutter 70 slides, the discharge port 66 is opened and closed by the toner seal member 110. The toner seal member 110 (more specifically, the coating layer) slides with respect to the outer surface of the discharge portion 64. The exposed surface 32 of the coating layer serves as a sliding surface with respect to the outer surface of the discharge portion 64.

[0045] The toner seal member 210 is ring-shaped and is sandwiched between the opening end of the toner storage portion 62 and the opening end of the discharge portion 64. The toner seal member 210 seals the connection portion between the discharge portion 64 and the toner storage portion 62. The surface of the toner seal member 210 on the foamed layer 20 side is fixed to the discharge portion 64 via an adhesive layer (not shown). The surface of the toner seal member 210 on the coating layer (refer to the coating layer 30 in FIG. 1) side contacts the toner storage portion 62 in a slidable state with respect to the toner storage portion 62. The toner seal member 210 is in a state of being compressed in the thickness direction between the discharge portion 64 and the toner storage portion 62. The exposed surface 34 of the coating layer serves as a sliding surface with respect to the opening end of the toner storage portion 62. Note that the exposed surface of the coating layer may be configured to be a sliding surface with respect to the opening end of the discharge portion 64.

[0046] 4. Operations and Effects of this Embodiment In this embodiment, by using a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group as raw materials, a toner seal member with excellent performance can be provided, which can reduce the compression sliding resistance, enhance the bending resistance, and improve the abrasion resistance. Moreover, by not using an organic solvent or the like in the manufacturing process, a toner seal member with an excellent working environment can be provided.

Example

[0047] Next, the above embodiment will be further specifically described with reference to examples and comparative examples. 1. Preparation of Toner Seal Member In Examples 1-7, a composition blended at the ratios shown in Table 1 was prepared and adhered to the foam layer. Then, the composition was irradiated with light to cure the composition by a photopolymerization reaction to produce a coating layer. The numerical values of each component without a unit description excluding the index in Table 1 represent parts by mass. The toner seal member of Comparative Example 1 has a configuration of only a foam layer without a coating layer. In the toner seal member of Comparative Example 2, the coating layer is formed by a solvent-based silicone coating. In the toner seal member of Comparative Example 3, the coating layer is formed by a general acrylate blended at the ratios shown in Table 1.

[0048] The manufacturing method of the members of Examples 1-7 will be specifically described. After synthesizing a urethane prepolymer from a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group, a coating layer was formed on the surface of the foam layer using a composition in which an initiator and a monomer were mixed. Specifically, the coating layer was formed by coating the mixed composition on the surface of the foam using a gravure coater and then irradiating with ultraviolet rays to cure (react).

[0049] The synthesis of the urethane prepolymer was carried out, for example, by charging a compound having two or more hydroxyl groups at the terminal such as a polyol into a closed reaction kettle equipped with a stirrer, a condenser, a vacuum dehydration device, and a nitrogen gas flow device, dehydrating under reduced pressure, then blending an isocyanate, and reacting at 70°C - 100°C for 3 hours - 8 hours under a nitrogen gas stream.

[0050]

Table 1

[0051] Various information regarding each component in Table 1 is shown in Table 2 below. In Table 2, the notations within parentheses in the "Type" column for Polyols 1-7 represent the raw materials of each Polyol 1-7. For example, the polyester polyol of Polyol 1 uses MPD and phthalic acid as raw materials. "Mn" in Table 2 represents the number average molecular weight. Here, the number average molecular weight was measured by gel permeation chromatography (GPC) method using polystyrene as the standard polymer. "Molecular weight" in Table 2 is obtained by summing the atomic weights of the atoms constituting the molecule. The "OHV" column indicates the hydroxyl value. Specific contents not described in the raw materials in Table 2 are shown below. Polyol 1: Polyester polyol (manufactured by Kuraray Co., Ltd., P-2020) Polyol 2: Polyester polyol (manufactured by Kuraray Co., Ltd., P-1020) Polyol 3: Polyester polyol (manufactured by Kuraray Co., Ltd., P-520) Polyol 4: Polycarbonate polyol (manufactured by Kuraray Co., Ltd., C-590) Polyol 5: Polycarbonate polyol (manufactured by Kuraray Co., Ltd., C-2090) Polyol 6: Polycarbonate polyol (manufactured by Kuraray Co., Ltd., C-3090) Polyol 7: Polyester polyol (manufactured by Kuraray Co., Ltd., P-1010) Initiator 1: Manufactured by BASF, IRGACURE127

[0052]

Table 2

[0053] 2. Evaluation Next, the following evaluations were conducted on the toner seal members of each of the obtained examples and comparative examples.

[0054] [Viscosity] The viscosity after mixing each raw material was measured at 25 °C using a B-type viscometer. Spindle No. 63 was used and the measurement was carried out at a rotational speed of 30 rpm. The results are shown in the column of "Viscosity (mPa·s) @25 °C" in Table 1.

[0055] [Pencil hardness] In accordance with JIS K5600-5-4:1999, under the condition of a 200 g load, using the pencil "Uni (registered trademark)" of Mitsubishi Pencil Co., Ltd., the pencil hardness of the surface of the coating layer was measured. The results are shown in the column of "Pencil hardness" in Table 1.

[0056] [Elongation] The composition formulated at the ratios in Tables 1 and 2 was coated on a release PET film using a roll coater to a thickness of 0.1 mm. A release PET film was placed on the surface of the coated composition and irradiated with ultraviolet rays to cure (react). A dumbbell-shaped No. 3 sample was punched out from the cured composition, the release PET film was peeled off, and a tensile test was conducted in accordance with JIS K 6251 2010 to measure the elongation at break. The results are shown in the column of "Elongation (%)" in Table 1.

[0057] [Tensile strength] The composition formulated at the ratios in Tables 1 and 2 was coated on a release PET film using a roll coater to a thickness of 0.1 mm. A release PET film was placed on the surface of the coated composition and irradiated with ultraviolet rays to cure (react). A dumbbell-shaped No. 3 sample was punched out from the cured composition, the release PET film was peeled off, and a tensile test was conducted in accordance with JIS K 6251 2010 to measure the tensile strength. The results are shown in the column of "Tensile strength (N / mm 2 )" in Table 1.

[0058] [Compression sliding resistance] A 30 mm square sample was prepared by punching it out from a toner seal member with double-sided tape attached to the side opposite to the sliding surface (the surface of the coating layer). A spacer was set so that the compression rate with respect to the ABS plate was 40%, and the sample was compressed. The sample was pulled with respect to the ABS plate at a pulling speed of 100 mm / min, and the pulling resistance value was measured. The results are shown in the column of "Sliding resistance under 40% compression (N)" in Table 1. The evaluation of the compression sliding resistance of the toner seal member was based on the following criteria. "A": 1 N or more and less than 20 N "B": 20 N or more and less than 40 N "C": 40 N or more

[0059] [Flexural resistance] A toner seal member with double-sided tape attached to the side opposite to the sliding surface (the surface of the coating layer) was attached to a 90° right angle portion. The surface state of the coating layer (the presence or absence of cracks, etc.) was visually confirmed. The evaluation of the flexural resistance of the toner seal member was based on the following criteria. "A": The surface state is good (no cracks, etc.) "C": The surface state is poor (there are cracks, etc.)

[0060] [Wear resistance] A ring-shaped sample with an inner diameter of 33 mm and an outer diameter of 39 mm was prepared by punching it out from a toner seal member with double-sided tape attached to the side opposite to the sliding surface (the surface of the coating layer). The sample was attached to a jig (a jig corresponding to the toner housing portion 62 and the discharge portion 64 shown in FIG. 2) at a compression rate of 42%, and rotated 180° every 3 seconds at a rotation speed of 50 rpm. One cycle is defined as a 180° rotation. The surface state of the coating layer (the presence or absence of cracks, etc.) was visually confirmed. The evaluation of the wear resistance of the toner seal member was based on the following criteria. "A": The surface state becomes poor (cracks, etc. occur) after 10,000 cycles or more "B": The surface state becomes poor (cracks, etc. occur) after 1,000 cycles or more and less than 10,000 cycles "C": The surface state becomes poor (cracks, etc. occur) after less than 1,000 cycles

[0061] [With or without solvent use] In the "Solvent Use" column of Table 1, it was indicated whether a solvent (such as an organic solvent) was used in the production of the coating layer or not.

[0062] [Comprehensive evaluation] "A": All of the evaluations of "Compression slip resistance", "Bending resistance", and "Wear resistance" are "A", and "Solvent use" is "None". "B": There is no "C" among "Compression slip resistance", "Bending resistance", and "Wear resistance", there is one "B", and "Solvent use" is "None". "C": There is no "C" among "Compression slip resistance", "Bending resistance", and "Wear resistance", there are two "B", and "Solvent use" is "None". "D": There is at least one "C" among "Compression slip resistance", "Bending resistance", and "Wear resistance", or "Solvent use" is "Yes".

[0063] 3. Results Examples 1 - 7 satisfy the following requirement (a). Comparative Examples 1 - 3 do not satisfy the following requirement (a). · Requirement (a): The coating layer is made from a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group as raw materials. In Examples 1 - 7, the "Comprehensive evaluation" was "A" - "C". In Examples 1 - 7, by satisfying the above requirement (a), the compression slip resistance can be reduced, the bending resistance can be enhanced, the wear resistance can be enhanced, and the working environment is excellent because organic solvents, etc. are not used in the manufacturing process.

[0064] 4. Effects of the examples According to the above examples, it was possible to provide a toner seal member that can reduce the compression slip resistance, enhance the bending resistance, enhance the wear resistance, and is excellent in the working environment because organic solvents, etc. are not used in the manufacturing process.

[0065] The present disclosure is not limited to the embodiments detailed above, and various modifications or changes are possible within the scope indicated in the claims of the present disclosure.

Explanation of symbols

[0066] 10,110: Toner seal member 20: Foam layer 30: Coating layer 32,34: Exposed surface 50: Toner cartridge 60: Container 62: Toner storage section 64: Discharge section 66: Discharge port 70: Shutter

Claims

1. A toner seal member comprising a foamed layer and a coating layer, wherein the coating layer is exposed, wherein the coating layer is a toner seal member made from a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group as raw materials.

2. The toner seal member according to claim 1, wherein the coating layer is formed by applying and curing the raw materials of the coating layer on the foamed layer.

3. The toner seal member according to claim 1 or claim 2, wherein the polyol includes a polycarbonate polyol.

4. The foamed layer is selected from a polyethylene foam, a polypropylene foam, a polystyrene foam, a polyamide foam, a polyethylene terephthalate (PET) foam, a polybutylene terephthalate (PBT) foam, a (meth)acrylic foam, a phenol foam, a polyvinyl chloride foam, a polyimide foam, a silicone resin foam, a urea resin foam, a melamine resin foam, an ethylene propylene diene rubber (EPDM) foam, a styrene butadiene rubber (SBR) foam, a nitrile butadiene rubber (NBR) foam, an ethylene-vinyl acetate copolymer (EVA) foam, an ethylene-acrylic acid copolymer foam, and an ethylene-ethyl acrylate copolymer (EEA) foam. The toner seal member according to claim 1 or claim 2.

5. A toner cartridge having the toner seal member according to claim 1 or claim 2.

6. A method for manufacturing a toner seal member comprising a foamed layer and a coating layer, wherein the coating layer is exposed, wherein the coating layer uses a polyol, an isocyanate, and a photopolymerizable monomer having a hydroxyl group as raw materials, including an adhesion step of attaching the raw materials of the coating layer to the foamed layer, and an irradiation step of irradiating light on the raw materials attached in the adhesion step to cure the raw materials by a photopolymerization reaction, The method for manufacturing a toner seal member, wherein the raw materials of the coating layer do not contain an organic solvent.

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