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CN-117203062-B - Contact member, drying apparatus and printing apparatus

CN117203062BCN 117203062 BCN117203062 BCN 117203062BCN-117203062-B

Abstract

The object is to provide a contact member which prevents transfer of components derived from a liquid composition from a contacted member to the contact member even in the case where the contact member and the contacted member are used in contact with each other for a long period of time. The contact member configured to contact a contacted member to which a liquid composition is applied includes a surface layer (A) configured to contact the contacted member, wherein the surface layer (A) includes a support layer containing acid-resistant aluminum sulfate, a root mean square height Sq of the surface layer (A) is 1.0 μm or more, and an orthogonal line roughness ratio of the surface layer (A) is 0.7 or more.

Inventors

  • HATTA SHUKO
  • MIZUTANI YUU

Assignees

  • 株式会社理光

Dates

Publication Date
20260512
Application Date
20220415
Priority Date
20210421

Claims (11)

  1. 1. A contact member configured to contact a contacted member to which a liquid composition is applied, the contact member comprising: A surface layer (A) configured to contact the contacted member, wherein The surface layer (A) comprises a support layer comprising acid-resistant aluminium sulphate, The root mean square height Sq of the surface layer (A) is 4.75 μm or more and 10.0 μm or less, The surface layer (A) has an orthogonal line roughness ratio of 0.74 or more and 0.82 or less, The amount of elemental fluorine in the surface layer (a) is 5.0atm% or more, A ratio of an area where the surface layer (A) and the contacted member contact each other to an area of the surface layer (A) is 16.0% or more and 34.0% or less, and The support layer has an average thickness of 20 μm or more and 31 μm or less.
  2. 2. The contact member according to claim 1, wherein the surface layer (a) comprises fluororesin particles adhered to the support layer.
  3. 3. The contact member according to claim 1, wherein the contact member has a vickers hardness of 400Hv or more and 500Hv or less.
  4. 4. The contact member of claim 1, wherein, The contact member includes a substrate and the surface layer (A) provided on the substrate, and The substrate comprises aluminum.
  5. 5. The contact member of claim 1, wherein the contact member is shaped as a roller having a diameter of 50mm or more and 600mm or less.
  6. 6. The contact member according to claim 1, wherein the contact member comprises a heating unit configured to apply heat to the contacted member via the surface layer (a).
  7. 7. The contact member according to claim 1, wherein the temperature of the surface layer (a) is 70 ℃ or higher and 260 ℃ or lower.
  8. 8. A drying apparatus, comprising: the contact member of claim 1, wherein, The drying apparatus is configured to dry a contacted member to which a liquid composition is applied.
  9. 9. A printing apparatus, comprising: A liquid composition applying unit configured to apply the liquid composition to the contacted member, and The contact member of claim 1.
  10. 10. The printing apparatus of claim 9, further comprising: A contacted member supply unit configured to supply the contacted member; a contacted member retrieving unit configured to retrieve the contacted member, and A conveyance path on which the contacted member supplied from the contacted member supply unit is conveyed until retrieved by the contacted member retrieval unit, wherein, The contacted member has a length in the conveying direction longer than a length of the conveying path.
  11. 11. The printing apparatus of claim 9, wherein a speed of conveying the contacted member is 50m/min or more.

Description

Contact member, drying apparatus and printing apparatus Technical Field The invention relates to a contact member, a drying apparatus and a printing apparatus. Background Inside a printing apparatus such as an inkjet device, a conveying member for conveying a recording medium such as a continuous form sheet and a cut sheet is provided. The conveyance member guides the recording medium to a mechanism for applying a liquid composition (such as ink), and to a mechanism for heating and drying the applied liquid composition. In recent years, in order to provide a high-yield water-repellent substrate capable of maintaining superior water-repellent performance, a water-repellent substrate has been proposed which includes an aluminum substrate, an alumite (alumite) layer provided on the surface of the aluminum substrate, and a water-repellent coating provided on the surface of the alumite layer, wherein the alumite layer has a base layer provided integrally with the aluminum substrate, and has an irregular structure formed of a plurality of needle-like protrusions erected in parallel on the surface of the base layer (see, for example, patent document 1). Further, in order to solve the problem of breakage, occurrence of image defects is prevented, and an image forming apparatus including a heat roller that can be used for a long time is provided, a fixing device in the image forming apparatus for fixing an unfixed toner image on a recording medium by using the heat roller provided with an alumite film having fine holes is proposed (see, for example, patent document 2). CITATION LIST Patent literature [ PTL 1] Japanese patent No. 6641990 [ PTL 2] Japanese patent application laid-open No. H9-114294 Disclosure of Invention Technical problem Accordingly, the disclosed technology aims to provide a contact member that prevents components derived from a liquid composition from being transferred from a contacted member to the contact member even in the case where the contact member and the contacted member are used in contact with each other for a long time. Solution to the problem According to one aspect of the present invention, a contact member configured to contact a contacted member to which a liquid composition is applied includes a surface layer (a) configured to contact the contacted member, wherein the surface layer (a) includes a support layer including acid-resistant aluminum sulfate (alumite sulfate), the surface layer (a) has a root mean square height Sq of 1.0 μm or more, and the surface layer (a) has an orthogonal line roughness ratio of 0.7 or more. Advantageous effects of the invention According to an embodiment of the present invention, there is provided a contact member that prevents a component derived from a liquid composition from being transferred from a contacted member to the contact member even in a case where the contact member and the contacted member are used in contact with each other for a long period of time. Drawings Fig. 1 is a schematic diagram showing an example of a printing apparatus using continuous paper. Fig. 2 is a schematic view showing a contacted member contacted with a contact member. Fig. 3 is an image showing the height of the surface layer (a) of example 1. Fig. 4 is an image showing the height of the surface layer (a) of comparative example 2. Fig. 5 is an image showing the height distribution of the cross section of the surface layer (a) of example 1. Fig. 6 is an image showing the height distribution of the cross section of the surface layer (a) of comparative example 1. Fig. 7 is an image showing the shape of the transfer portion when the contact member of embodiment 1 is used. Fig. 8 is an image showing the shape of the transfer portion when the contact member of comparative example 1 is used. Detailed Description With respect to a conventional conveyance member used in an image forming apparatus or the like, when the conveyance member is in direct contact with an area to which a liquid composition is applied, transfer of the liquid composition to the conveyance member has caused a failure in some cases. It is known that such transfer of a liquid composition to such a transfer member becomes remarkable when a slow-drying ink such as an aqueous ink or an ink including a low-volatility solvent as a main component is used as the liquid composition. Further, in the above-mentioned patent documents 1 to 2 as conventional techniques, when the contact member is in contact with the contacted member to which the liquid composition is applied, the contact member is used for a long time in such a manner as to be in contact with the contacted member, and there is a problem that a component derived from the liquid composition is transferred from the contacted member to the contact member. As a result of intensive studies, the inventors of the present invention have found that by providing a surface layer (a) having a support layer including aluminum sulfate resistant to acid on a con