Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
  • G03G7/0053—Intermediate layers for image-receiving members
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
  • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
  • G03G7/002—Organic components thereof
  • G03G7/0026—Organic components thereof being macromolecular
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
  • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
  • G03G7/002—Organic components thereof
  • G03G7/0026—Organic components thereof being macromolecular
  • G03G7/004—Organic components thereof being macromolecular obtained by reactions only involving carbon-to-carbon unsaturated bonds
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
  • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
  • G03G7/002—Organic components thereof
  • G03G7/0026—Organic components thereof being macromolecular
  • G03G7/0046—Organic components thereof being macromolecular obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

• the present invention relates to an image-recording sheet, more particularly to an
• image-recording sheet suitable for image recording with an electrophotographic color
• a copying machine and a printer record images through electrography.
• Illustrative images include letters, prints, lines and drawings or pictures on an
• image-recording sheet provided in the form of a printing paper, an overhead projector
• Electrophotography is well known and can be generally carried out as
• a photoconductive layer made of a photosemiconductor is pre-charged
• a coloring fine particle that is, a toner having an
• the toned image is transferred to an image-recording sheet with a transfer
• color toners e.g., cyan, magenta, yellow, etc.
• the color image is formed on the image-recording sheet.
• image-recording sheets comprise an image-receptive layer formed
• a toned image is fixed to the image-receptive layer.
• an image-receptive layer of a transparent resin is formed on a prescribed paper
• image-recording sheet has a thick image-receptive layer, it is accompanied with
• the present invention has been completed in order to solve the
• the image-receptive layer has ten-point average surface
• Rz roughness
• FIG. 1 shows a cross-section of an illustrative embodiment of the
• image-recording sheet of the present invention comprising substrate 1,
• image-receptive layer 2 image-receptive layer 2, and gloss layer 3.
• invention comprises substrate 1 and image-receptive layer 2 (without the gloss layer 3
• substrate 1 is a paper substrate and preferably at
• Such a paper substrate includes coated paper such as enamel paper, art paper,
• the paper substrate basis weight is
• the stiffness of the paper substrate becomes weak and the transportability can be poor.
• the image-receptive layer has a ten-point average surface roughness (Rz) of
• the image-receptive layer may be formed on both
• the image-receptive layer is used for recording an
• the image-receptive layer contains a thermoplastic resin.
• thermoplastic resin has a storage modulus of about 1 x 10 to 1 x 10 Pa at 160°C, and
• image-receptive layer is kept substantially smooth and it is possible to produce the
• thermoplastic resin has the storage modulus less than about 1 x 10 3
• the image-recording sheet tends to cause split of the toned image due to the
• thermoplastic resin has a thermoplastic resin
• thermoplastic resin is not particularly limited as long as its
• acrylic resins styrene
• resins or polyester resins are used. These resins have high transparency and are
• resins polyetherpolyol resins, or mixtures of these resins.
• the resins can be any resins.
• the image-receptive transparent layer may further contain a compatibilizer.
• the compatibilizer is not specifically limited, it preferably has a solubility
• solubility parameter in the above-defined range is used, the toner easily melts in the
• thermofixation process and becomes compatible with the thermoplastic resin to give
• the color blending can be improved and, as a result, particularly in case of color toners, the color blending can
• the toner contains styrene resin, styrene-acrylic
• the image-recording sheet of the present invention can provide the image with the
• the inventive image-recording sheet may contain an antistatic agent.
• antistatic agent controls the surface resistance of the image-receptive layer
• Preferable antistatic agents include nonionic antistatic
• cationic antistatic agent cationic antistatic agent
• anionic antistatic agent cationic antistatic agent
• fluorine-containing antistatic agent a combination of these antistatic agents and a salt (such as lithium nitrate,
• sheet further comprises the gloss layer 3 interposed between the substrate 1 and the
• the gloss layer has a refractive index higher than that
• thermoplastic resin of the image-receptive layer by at least 0.002 in terms of
• Such a gloss layer is made of a transparent optical material containing, for
• acrylic resin styrene resin, styrene-acrylic resin, epoxy resin,
• styrene-butadiene resin polyurethane resin, or polyester resin.
• Styrene-acrylic resin styrene-acrylic resin
• polyester resin are preferred because of the high adhesion strength between the
• the above-described image-recording sheet can be produced by, for example,
• thermoplastic resin and, if used, the compatibilizer are dissolved and
• MEK methyl ethyl ketone
• the over coating agent is heated and
• the dry coating amount is preferably from about 0.5 to 15 g/m .
• dry coating amount is lower than about 0.5 g/m 2 , a toned image tends to be difficult to
• hot-offset of the image-receptive layer may be caused.
• a glossy primer layer may be formed on the substrate.
• the primer can be
• the primer can then be applied to the substrate, and heated and dried
• the dry coating amount of the gloss layer is preferably from about 0.1 to
• the dry coating amount is lower than about 0.1 g/m 2 , it may be
• the image-receptive layer may contain components other than those
• a loading filler comprising an inorganic pigment such as
• a wax such as paraffin wax, microcrystalline wax, carnauba wax,
• Such a wax is capable of efficiently separating the toner
• the fixing apparatus e.g., the fixing
• an over coating composition was prepared by:
• coating composition was heated to 100°C and dried for 3 minutes to remove the
• the image-receptive transparent layer with the dry coating amount of 4.0 g/m 2 and produce an image-recording sheet.
• the image-receptive transparent layer with the dry coating amount of 4.0 g/m 2 and produce an image-recording sheet.
• the surface roughness of the image-receptive layer was measured with a
• the measurement angle was set at 75°.
• the chromas were measured with a
• Example 1 except that the paper substrate itself was used as the image-recording sheet
• image-recording sheet has excellent color reproducibility and can provide a toned
• an image-recording sheet was produced in the same manner as
• Example 1 except that an over coating composition was prepared by mixing the
• an image-recording sheet was produced in the same manner as
• Example 1 except that an over coating composition used was prepared by mixing
• An image-recording sheet was produced in the same manner as in Example 1
• the image-receptive layer was 1.218 ⁇ m. However, in the image-recording sheet of
• Example 4 In this example, first, a primer composition was produced by mixing the
• primer composition was applied with a Mayer bar to one surface of a paper
• the primer composition was heated to 100°C and dried for
• the refractive index of the gloss layer was 1.4952.
• the refractive index of the image-receptive layer was 1.4879.
• Example 1 Same surface roughness meter as that used in Example 1.
• invention can provide a high quality toned image.
• an image-recording sheet was produced in the same manner as
• Example 4 Example 4 except that a paper substrate (Pearlcoat produced by Mitsubishi Paper
• image-receptive layer composition used were prepared by mixing the components
• the image-receptive transparent layer had a surface roughness Rz of 0.835 ⁇ m.
• the refractive index of the image-receptive layer was 1.5044.
• the image-receptive transparent layer was
• invention can provide a high quality toned image by forming the gloss layer.

Applications Claiming Priority (3)

Publications (1)

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Country Status (4)

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• 2001
  • 2001-04-27 JP JP2001131573A patent/JP2002341580A/ja active Pending
• 2002
  • 2002-04-02 EP EP02725468A patent/EP1395879A1/de not_active Withdrawn
  • 2002-04-02 CN CNA02809011XA patent/CN1505774A/zh active Pending
  • 2002-04-02 WO PCT/US2002/010246 patent/WO2002088847A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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