Toner sealing member and toner cartridge

Abstract

Provided is a toner sealing member having excellent performance. The toner sealing member (10) has a foam layer (20) and a coating layer (30), and the coating layer (30) is exposed. The coating layer (30) is made from a polyol, an isocyanate, and a photopolymerizable monomer having a hydrocarbon group.

Description

Technical Field

[0001] The present disclosure relates to a toner sealing member and a toner cartridge. Background Art

[0002] Patent Document 1 discloses a sealing member having a sheet-shaped elastic member and a coating layer. Patent Document 2 discloses a toner sealing member having a urethane foam layer and a urethane film layer.

[0003] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2002-214895 Patent Document 2: Japanese Patent Application Publication No. 2009-265425 Summary of the invention Problem that the invention aims to solve In recent years, various performances are required for toner seal members, and the requirements are becoming stricter.

[0004] An object of the present disclosure is to provide a toner sealing member having excellent performance.

[0005] The present disclosure can be implemented in the following manner.

[0006] Means used to solve problems [1] A toner sealing member having a foamed layer and a coating layer, the coating layer being exposed, wherein: The coating layer uses polyol, isocyanate and a photopolymerizable monomer having a hydrocarbon group as raw materials.

[0007] Effects of the Invention According to the present disclosure, a toner seal member having excellent performance can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a cross-sectional view of a toner seal member according to one embodiment.

[0009] Figure 2 This is a partial cross-sectional view of a toner cartridge according to an embodiment when the discharge port is in a closed state.

[0010] Figure 3 is Figure 2 A partial cross-sectional view of a toner cartridge with the discharge port in an open state. DETAILED DESCRIPTION

[0011] Here, preferred examples of the present disclosure are shown.

[0012] [2] A toner cartridge having the toner sealing member described in [1].

[0013] The present disclosure is described in detail below. In addition, in this specification, regarding the numerical range, in the description using "-", unless otherwise specified, it is considered to include the lower limit and the upper limit. For example, in the description of "10-20", "10" as the lower limit and "20" as the upper limit are both included. That is, "10-20" has the same meaning as "10 or more and 20 or less".

[0014] 1. Toner seal member Figure 1 1 is a cross-sectional view of a toner sealing member 10 according to an embodiment. The toner sealing member 10 includes a foaming layer 20 and a coating layer 30. The coating layer 30 is exposed in the toner sealing member 10. For example, the toner sealing member 10 is a laminate of the foaming layer 20 and the coating layer 30. For example, the coating layer 30 is a skin layer.

[0015] [Foaming layer] The foam layer 20 is composed of, for example, a synthetic resin foam. Examples of the foam layer 20 include the following synthetic resin foams: polyurethane foam; polyolefin foams such as polyethylene foam or polypropylene foam; polystyrene foam; polyamide foam; polyester foams such as polyethylene terephthalate (PET) foam or polybutylene terephthalate (PBT); (meth)acrylic foam; phenol foam; polyvinyl chloride foam; polyimide foam; silicone foam; urea resin foam; melamine resin foam; ethylene propylene diene rubber (EPDM) foam; styrene butadiene rubber (SBR) foam; nitrile rubber (NBR) foam; ethylene-vinyl acetate copolymer (EVA) foam; ethylene-acrylic acid copolymer foam; ethylene-ethyl acrylate copolymer (EEA) foam. Among these foams, polyurethane foam is more preferred from the viewpoint of adhesion with the coating layer.

[0016] [coating] The coating layer 30 is made of polyol, isocyanate, and a photopolymerizable monomer having a hydrocarbon group. The coating layer 30 is formed on the surface of the foam layer 20 using a composition including a urethane prepolymer obtained by reacting polyol, isocyanate, and a photopolymerizable monomer having a hydrocarbon group.

[0017] Urethane prepolymers are urethane prepolymers having photoreactive groups at the ends and containing polyester bonds in the polymer skeleton. The photoreactive groups are functional groups that can be crosslinked by irradiation with X-rays, electron beams, ultraviolet rays, visible rays, etc. More specifically, urethane prepolymers are substances obtained by reacting a compound containing a photoreactive group (a compound having a photoreactive group that can react with the end of the reactant) with a reactant of a polyisocyanate and a polyol. The following describes various raw materials used in the manufacture of urethane prepolymers.

[0018] [Polyol] The polyol is not particularly limited. The polyol preferably includes at least one of a polyester polyol and a polycarbonate polyol.

[0019] Examples of the polyester polyol include: polyester polyols such as polypropylene glycol obtained by dehydration condensation reaction of aliphatic dicarboxylic acids (such as succinic acid, adipic acid, sebacic acid and azelaic acid), aromatic dicarboxylic acids (such as phthalic acid, terephthalic acid, isophthalic acid and other naphthalene dicarboxylic acids), alicyclic dicarboxylic acids (such as hexahydrophthalic acid, hexahydroterephthalic acid and hexahydroisophthalic acid), or acid esters or anhydrides thereof, with 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, or a mixture thereof; and polylactone diols obtained by ring-opening polymerization of lactone monomers such as ε-caprolactone and methylvalerolactone.

[0020] The polyester polyol is preferably a product obtained by a condensation reaction of 3-methyl-1,5-pentanediol (MPD) and terephthalic acid, or a product obtained by a condensation reaction of 3-methyl-1,5-pentanediol (MPD) and adipic acid.

[0021] Next, the polycarbonate polyol is described. The polycarbonate polyol is preferably a polycarbonate diol. The polycarbonate diol is obtained, for example, by reacting a diol component with a carbonylating agent. As the diol component, for example, aliphatic diols, alicyclic diols, ester diols, aromatic diols, etc. can be cited. As aliphatic diols, for example, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,4-butanediol, diethylene glycol, etc. can be cited, and these diols can be used alone or in combination of two or more. As alicyclic diols, 1,4-cyclohexanediol, etc. can be cited. As ester diols, bis(hydroxyethyl) terephthalate (Bis(hydroxyethyl)Terephthalate) and the like can be cited. As aromatic diols, aromatic diols such as alkylene oxide adducts of bisphenol A can be cited. Examples of the carbonylating agent include diethyl carbonate, ethylene carbonate, propylene carbonate, dimethyl carbonate, dibutyl carbonate, diphenyl carbonate, diphenyl carbonate, and phosgene.

[0022] The polycarbonate polyol is preferably a polyol 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 to 8:2, and more preferably 9:1.

[0023] The polyol preferably includes a polyol obtained by a condensation reaction of 3-methyl-1,5-pentanediol (MPD) and adipic acid.

[0024] The hydroxyl value of the polyol is preferably 10 to 1000 mgKOH / g, more preferably 20 to 500 mgKOH / g, and still more preferably 30 to 300 mgKOH / g. The hydroxyl value is a value measured in accordance with JIS-K0070.

[0025] When the total amount of the polyol, isocyanate and photopolymerizable monomer having a hydroxyl group is 100 parts by mass, the polyol is preferably 50 parts by mass or more and 90 parts by mass or less, more preferably 55 parts by mass or more and 85 parts by mass or less, and further preferably 60 parts by mass or more and 80 parts by mass or less.

[0026] [Isocyanate] Isocyanate (polyisocyanate) is a compound having multiple isocyanate groups, for example, aromatic isocyanates such as 4,4-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), 1,5-naphthalene diisocyanate (NDI), triphenylmethane triisocyanate, xylene diisocyanate (XDI), alicyclic isocyanates such as isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate, aliphatic isocyanates such as hexamethylene diisocyanate (HDI), or free isocyanate prepolymers obtained by reacting these substances with polyols, modified isocyanates such as carbodiimide modified isocyanates. In addition, these isocyanates may contain only one kind or a combination of two or more kinds.

[0027] The isocyanate may be any of aromatic, alicyclic, and aliphatic isocyanates, or may be a difunctional isocyanate having two isocyanate groups in one molecule, or a trifunctional or higher isocyanate having three or more isocyanate groups in one molecule. These isocyanates may be used alone or in combination of two or more.

[0028] For example, examples of the bifunctional isocyanate include 2,4-toluene diisocyanate (TDI), 2,6-toluene diisocyanate (TDI), m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate (MDI), 2,4'-diphenylmethane diisocyanate (MDI), 2,2'-diphenylmethane diisocyanate (MDI), xylene diisocyanate, 3,3'-dimethyl-4,4'-biphenyl diisocyanate, Cyclic isocyanates such as cyclohexane-1,4-diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, and methylcyclohexane diisocyanate; aliphatic isocyanates such as butane-1,4-diisocyanate, hexamethylene diisocyanate, isopropyl diisocyanate, methylene diisocyanate, and lysine diisocyanate. In addition, examples of difunctional or higher-functional isocyanates include polymethylene polyphenyl isocyanate (polymeric MDI). Examples of trifunctional or higher-functional isocyanates 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, and triphenylmethane-4,4',4"-triisocyanate. The isocyanates are not limited to one type, and may be more than one type. For example, one type of aliphatic isocyanate and two types of aromatic isocyanates may be used in combination.

[0029] In addition, the number of functional groups of isocyanate is preferably in the range of 2.0 to 2.8.

[0030] In addition, the isocyanate index (INDEX) of the urethane prepolymer is preferably 80 to 150, and more preferably 90 to 130. The isocyanate index is the equivalent ratio of the isocyanate group 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 a hydroxyl group. 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; when the value exceeds 100, it means that the isocyanate groups are in excess of the reactive groups such as hydroxyl groups.

[0031] When the total amount of the polyol, isocyanate and the photopolymerizable monomer having a hydroxyl group is set to 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 further preferably 15 parts by mass or more and 20 parts by mass or less.

[0032] [Photopolymerizable monomer having a hydrocarbon group] The photopolymerizable monomer having a hydroxyl group is a compound having a photoreactive group that can react with isocyanate. Examples of the "photoreactive group" include alkenyl, alkynyl, vinyl, acrylic, methacrylic, and allyl groups. The "photoreactive group" preferably contains an ethylenically unsaturated bond (-C=C-). As such a "photoreactive group", a methacrylate group (CH 2 =C(CH 3 )-COO-) and acrylate groups (CH 2 =CH-COO-).

[0033] The photopolymerizable monomer having a hydroxyl group is a compound having one or more hydroxyl groups in one molecule, and examples thereof include monomers having an allyl ether group such as allyl ether diol 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. In addition, "(meth)acrylate" refers to acrylate and / or methacrylate. The (meth)acrylate alkyl ester having a hydroxyl group as a photopolymerizable monomer can be used alone or in combination of two or more.

[0034] As the photopolymerizable monomer having a hydroxyl group, hydroxyethyl (meth)acrylate is preferred, and 2-hydroxyethyl acrylate (HEA) is more preferred.

[0035] When the total amount of the polyol, isocyanate and photopolymerizable monomer having a hydroxyl group is set to 100 parts by mass, the photopolymerizable monomer having a hydroxyl group is preferably more than 2 parts by mass and less than 30 parts by mass, more preferably more than 5 parts by mass and less than 25 parts by mass, and further preferably more than 8 parts by mass and less than 20 parts by mass.

[0036] [Initiator] The composition may also contain an initiator used for the photopolymerization reaction. Examples of the initiator include acetophenones, diphenyl ketones, thioxanthones and other compounds. Examples of the acetophenones include 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]phenyl}-2-methyl-propane-1-one, 1-[4-(2-hydroxyethoxy)phenyl]-2-hydroxy-2-methyl-1-propane-1-one, 2,2-dimethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, 4-(1-tert-butyldioxy-1-methylethyl)acetophenone, 2-methyl-1-[4-( methylthio)phenyl]-2-morpholinyl-propane-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinylphenyl)-butanone-1, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropane-1-one, benzyl dimethyl ketal, 4-(2-hydroxyethoxy)phenyl-(2-hydroxy-2-propyl)ketone, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]acetone oligomer, etc.

[0037] Examples of the benzophenones include 4-(1-tert-butyldioxy-1-methylethyl)benzophenone, 3,3',4,4'-tetrakis(tert-butyldioxycarbonyl)benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzyl-4'-methyl-diphenyl sulfide, 3,3',4,4'-tetrakis(tert-butylperoxycarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, 4-benzoyl-N,N-dimethyl-N-[2-(1-oxo-2-propenyloxy)ethyl]benzylamine bromide, and (4-benzoylbenzyl)trimethylammonium chloride. Examples of thioxanthones include 2,4-dimethylthioxanthone, 2,4-diisopropylthioxanthone, 2-chlorothioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, and 2-(3-dimethylamino-2-hydroxy)-3,4-dimethyl-9H-thioxanthone-9-one mesochloride.

[0038] [monomer] The composition may also contain a photopolymerizable monomer. As a monomer, compounds having groups such as alkenyl, alkynyl, vinyl, acrylic, methacrylic, and allyl groups can be cited. As a monomer, 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, etc. can be cited. The monomer preferably has a compound having one or more ethylenically unsaturated groups in the molecule.

[0039] When the total amount of the polyol, isocyanate and photopolymerizable monomer having a hydrocarbon group is set to 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 further preferably 20.0 parts by mass or more and 40.0 parts by mass or less.

[0040] [Other ingredients] The composition may contain other components other than the above-mentioned components as required. Examples of other components include tackifiers, curing accelerators, fillers, coupling agents, rust inhibitors, antioxidants, ultraviolet absorbers, thickeners, plasticizers, antibacterial agents, and colorants.

[0041] [Ductility of coating 30] The ductility (Elongation) of the coating layer 30 is measured by a tensile test in accordance with JIS K6251-2010, and is preferably 5% or more, more preferably 10% or more, and even more preferably 15% or more.

[0042] [Breaking Strength of Coating 30] The breaking strength of the coating 30 is measured by a tensile test according to JIS K62512010 and is preferably 5 N / mm 2 More preferably 10N / mm 2 More than, more preferably 15N / mm 2 above.

[0043] 2. Method for manufacturing toner sealing member The manufacturing process of the toner seal member 10 includes an attachment process of attaching the raw material of the coating layer 30 to the foaming layer 20 and an irradiation process of irradiating the raw material attached in the attachment process with light to cure the raw material by photopolymerization reaction.

[0044] Specifically, the composition (mixed raw material) for the coating layer 30 is applied to the surface of the foaming layer 20 using, for example, a gravure coater, and then irradiated with ultraviolet rays to cure (react).

[0045] The coating layer 30 is formed on the surface of the foam layer 20 using a composition obtained by, for example, synthesizing a urethane prepolymer from polyol, isocyanate, and a photopolymerizable monomer having a hydrocarbon group and then mixing the mixture with an initiator, monomers, and the like.

[0046] The synthesis of the urethane prepolymer can be carried out by a known method. For example, a compound having two or more hydrocarbon groups at the terminal such as a polyol can be placed in a closed reactor equipped with a stirrer, a condenser, a decompression dehydration device, and a nitrogen gas flow device, and dehydrated under reduced pressure, and then isocyanate is prepared and reacted under a nitrogen gas flow at 70° C. to 100° C. for 3 to 8 hours. In the synthesis of the urethane prepolymer, an organotin compound or an amine can be used as a urethane catalyst as needed.

[0047] In addition, regarding various numerical ranges described in the specification, the upper limits and lower limits thereof can be arbitrarily combined, and all of these combinations are described in the specification as preferred numerical ranges.

[0048] 3. Toner Cartridge Figure 2 It is a partial cross-sectional view of a toner cartridge 50 according to an embodiment. The toner cartridge 50 includes a container 60, a shutter 70, and toner sealing members 110 and 210. The toner sealing members 110 and 210 are equivalent to an example of the toner sealing member 10. The toner sealing members 110 and 210 have a foaming layer and a coating layer having the same structure as the foaming layer 20 and the coating layer 30 of the toner sealing member 10. The container 60 contains toner. The container 60 includes a toner containing portion 62 and a discharge portion 64. The toner containing portion 62 contains toner. The toner containing 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.

[0049] The shutter 70 is supported by the discharge portion 64 near the discharge port 66 so as to be able to slide along the outer surface of the discharge portion 64. A toner sealing member 110 is mounted on the shutter 70. The toner sealing member 110 is arranged on the discharge portion 64 side relative to the shutter 70. Figure 1 The coating layer 30 is configured to be exposed on the outer surface side of the discharge portion 64.

[0050] like Figure 2 , Figure 3 As shown, the toner sealing member 110 slides along the outer surface of the discharge portion 64 as the shutter 70 slides. As the shutter 70 slides, the discharge port 66 is opened and closed by the toner sealing member 110. The toner sealing member 110 (more specifically, the coating) slides relative to the outer surface of the discharge portion 64. The exposed surface 32 of the coating serves as a sliding surface relative to the outer surface of the discharge portion 64.

[0051] The toner sealing member 210 is annular and is sandwiched between the open end of the toner container 62 and the open end of the discharge portion 64. The toner sealing member 210 seals the connection between the discharge portion 64 and the toner container 62. The surface of the toner sealing member 210 on the foam layer 20 side is fixed to the discharge portion 64 via an adhesive layer (not shown). The coating layer of the toner sealing member 210 (see Figure 1 The surface of the coating 30) side of the toner container 62 is in contact with the toner container 62 in a state that it can slide relative to the toner container 62. The toner sealing member 210 is in a state of being compressed in the thickness direction between the discharge portion 64 and the toner container 62. The exposed surface 34 of the coating becomes a sliding surface relative to the opening end of the toner container 62. In addition, the exposed surface of the coating may also be a structure that becomes a sliding surface relative to the opening end of the discharge portion 64.

[0052] 4. Functions and Effects of This Implementation In this embodiment, the coating layer uses polyol, isocyanate, and a photopolymerizable monomer having a hydrocarbon group as raw materials, thereby providing a toner sealing member having excellent performance, which can reduce compression sliding resistance, improve bending resistance, and improve wear resistance. In addition, since no organic solvent is used in the manufacturing process, a toner sealing member that is friendly to the working environment can be provided.

[0053] Example Next, the above-mentioned embodiment will be described in more detail with reference to Examples and Comparative Examples.

[0054] 1. Production of toner sealing components In Examples 1-7, a composition prepared in the ratio of Table 1 was prepared and attached to the foaming layer. Thereafter, the composition was irradiated with light to cure the composition by photopolymerization reaction to produce a coating layer. The numerical values ​​of each component in Table 1 without describing a unit except for an index represent parts by mass.

[0055] The toner sealing member of Comparative Example 1 is a structure of only a foamed layer without a coating layer.

[0056] In the toner seal member of Comparative Example 2, the coating layer is composed of a solvent-type silicone coating.

[0057] In the toner seal member of Comparative Example 3, the coating layer is composed of a general acrylic ester blended in the ratio shown in Table 1.

[0058] The method for producing the components of Examples 1 to 7 is specifically described. After synthesizing a urethane prepolymer from a polyol, an isocyanate, and a photopolymerizable monomer having a hydrocarbon group, a coating is formed on the surface of the foam layer using a composition mixed with an initiator and a monomer. Specifically, the coating is applied to the surface of the foam using a gravure coater, and then irradiated with ultraviolet light to cure (react).

[0059] The synthesis of the urethane prepolymer is, for example, a closed reactor equipped with a stirrer, a condenser, a vacuum dehydration device, and a nitrogen gas flow device, wherein a compound having two or more hydrocarbon groups at the end such as a polyol is placed and dehydrated under reduced pressure, and then isocyanate is prepared and reacted under a nitrogen flow at 70°C-100°C for 3 hours to 8 hours.

[0060] [Table 1]

[0061] Various information related to each component in Table 1 is shown in Table 2 below.

[0062] In Table 2, the contents in parentheses in the "Type" column of Polyols 1 to 7 indicate the raw materials of each of Polyols 1 to 7. For example, the polyester polyol of Polyol 1 uses MPD and phthalic acid as raw materials.

[0063] "Mn" in Table 2 represents the number average molecular weight. The number average molecular weight is measured by gel permeation chromatography (GPC) using polystyrene as a standard polymer. The "molecular weight" in Table 2 is obtained from the sum of the atomic weights of atoms constituting the molecule.

[0064] The "OHV" column shows the hydroxyl value.

[0065] Specific contents not described in the raw materials in Table 2 are as follows.

[0066] 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, 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: IRGACURE 127 manufactured by BASF [Table 2]

[0067] 2. Evaluation Next, the following evaluations were performed on the obtained toner seal members of each example and each comparative example.

[0068] [Viscosity] The viscosity of each raw material after mixing was measured at 25° C. using a B-type viscometer. The measurement was performed using a spindle No. 63 at a rotation speed of 30 rpm. The results are shown in the column “Viscosity (mPa·s)@25° C.” in Table 1.

[0069] [Pencil hardness] The pencil hardness of the coated surface was measured under a load of 200 g using a pencil "Uni (registered trademark)" produced by Mitsubishi Pencil Co., Ltd. in accordance with JIS K5600-5-4:1999. The results are shown in the "Pencil Hardness" column of Table 1.

[0070] [Ductility] The composition prepared in the ratios of Tables 1 and 2 was applied to a release PET film using a roll coater to a thickness of 0.1 mm. The release PET film was covered on the surface of the applied composition, and ultraviolet rays were irradiated to cure (react). A dumbbell-shaped No. 3 sample was punched out from the cured composition, and the release PET film was peeled off. A tensile test was performed according to JIS K6251 2010 to measure the elongation at break. The results are shown in the "Ductility (%)" column of Table 1.

[0071] [Breaking strength] Use a roll coater to apply the composition prepared in the proportions of Tables 1 and 2 onto a release PET film in a thickness of 0.1 mm. Cover the surface of the applied composition with the release PET film, irradiate it with ultraviolet light and cure (react). A dumbbell-shaped No. 3 sample is punched out from the cured composition, and the release PET film is peeled off. A tensile test is performed according to JIS K6251 2010 to measure the breaking strength. The results are shown in the "Breaking Strength (N / mm 2 )" column.

[0072] [Compression sliding resistance] A 30 mm square sample was punched out from a toner sealing member with a double-sided tape on the opposite side of the sliding surface (coated surface). A spacer was set in such a way that the compression rate relative to the ABS plate reached 40%, and the sample was compressed. The sample was stretched at a tensile speed of 100 mm / min relative to the ABS plate, and the tensile resistance value was measured. The results are shown in the "40% compression sliding resistance (N)" column of Table 1.

[0073] The compression sliding resistance of the toner seal member was evaluated based on the following criteria.

[0074] "A": 1N or more and less than 20N "B": 20N or more and less than 40N "C": 40N or more [Bending resistance] A toner sealing member having a double-sided tape on the opposite side of the sliding surface (the surface of the coating) was attached to the right angle portion of 90°. The surface condition of the coating (the presence or absence of cracks, etc.) was visually checked.

[0075] The evaluation of the bending resistance of the toner seal member was performed based on the following criteria.

[0076] "A": Good surface condition (no cracks, etc.) "C": Poor surface condition (cracks, etc.) [Abrasion resistance] A ring-shaped sample with an inner diameter of 33 mm and an outer diameter of 39 mm was punched out from a toner seal member with double-sided tape on the opposite side of the sliding surface (coated surface). The sample was mounted on a fixture (equivalent to Figure 2 The jig for the toner containing portion 62 and the discharge portion 64 shown in the figure) was rotated 180° every 3 seconds at a rotation speed of 50 rpm. A rotation of 180° was regarded as one cycle. The surface condition of the coating (presence of cracks, etc.) was visually confirmed.

[0077] The evaluation of the wear resistance of the toner seal member was performed based on the following criteria.

[0078] [A]: Surface condition is poor (cracks, etc.) at more than 10,000 cycles [B]: Surface condition is poor (cracks etc.) at a cycle of more than 1,000 times but less than 10,000 times [C]: Surface condition is poor (cracks, etc.) at less than 1,000 cycles [Whether or not solvent is used] The column “Solvent Use” in Table 1 shows whether a solvent (organic solvent, etc.) was used in the production of the coating layer.

[0079] [Comprehensive evaluation] "A": "Compression sliding resistance", "Bending resistance", and "Abrasion resistance" are all rated "A", and "Solvent use" is "None" "B": There is no "C" in "Compression Sliding Resistance", "Bending Resistance", and "Abrasion Resistance", but there is one "B", and "Solvent Use" is "None" "C": There is no "C" in "Compression Sliding Resistance", "Bending Resistance", and "Abrasion Resistance", but there are two "Bs", and "Solvent Use" is "None" "D": At least one "C" in "Compression Sliding Resistance", "Bending Resistance", "Abrasion Resistance", or "Solvent Use" is "Yes" 3. Results Example 1-7 satisfies the following requirement (a). Comparative Example 1-3 does not satisfy the following requirement (a).

[0080] ・Requirement (a): The coating is made of polyol, isocyanate, or a photopolymerizable monomer having a hydrocarbon group. In Examples 1 to 7, the "comprehensive evaluation" is "A" to "C". In Examples 1 to 7, since the above requirement (a) is satisfied, the compression sliding resistance can be reduced, the bending resistance can be improved, the wear resistance can be improved, and since no organic solvent is used in the manufacturing process, the working environment is friendly.

[0081] 4. Effects of the Embodiments According to the above embodiments, there is provided a toner sealing member which has reduced compression sliding resistance, improved bending resistance, improved wear resistance, and is friendly to the working environment because no organic solvent is used in the manufacturing process.

[0082] The present disclosure is not limited to the embodiments described in detail above, and various modifications and changes can be made within the scope of the claims of the present disclosure.

[0083] Description of Reference Numerals 10, 110: toner sealing member, 20: Foaming layer, 30: coating, 32, 34: Reveal your face, 50: Toner cartridge, 60: container, 62: Toner storage unit, 64: discharge part, 66: discharge port, 70: Block the door.

Claims

1. A toner sealing member having a foaming layer and a coating layer, wherein the coating layer is exposed, wherein The coating layer uses polyol, isocyanate and a photopolymerizable monomer having a hydrocarbon group as raw materials.

2. A toner cartridge, wherein: A toner sealing member according to claim 1 is provided.

Images