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US 6,475,569 B1Granted
Electrophotographic transfer paper
AssigneeCanon Kabushiki Kaisha
InventorMotohiro Ogura
Life of this patent
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Abstract
An electrophotographic transfer paper of the present invention has a basis weight of 60 to 100 g/m2, which is coated by a film at least on one side, and has an average surface centerline roughness (Ra) of 1.5 μm or less, volume resistivity of 1×109 Ωcm or more at 30° C./80% RH and paper stiffness of 16 cm or more, and prevents uneven discharge under low humidity conditions, and produces no faulty images and shows sufficient paper transportability under high humidity conditions.
Claims4
A method for producing an electrophotographic transfer paper, comprising the steps of:
- providing a paper substrate;
- and
- coating a coating agent containing a pigment and an adhesive at least on one side of the paper substrate at a pressure of 50 kg/cm2 or less to form a coating layer,
- wherein said coating layer undergoes no calendering treatment, and
- wherein said transfer paper has the following characteristics:
- (1) a basis weight of 60 to 100 g/m2,
- (2) an average surface centerline roughness (Ra) of 1.5 μm or less on the surface of the coating layer,
- (3) a volume resistivity of 1×109 Ωcm or more at 30° C./80% RH, and
- (4) a paper stiffness of 16 cm or more.
6 more elements
Dependencies are inferred from the claim text.