EP0840677A1 - Structure de blanchet pour impression numerique - Google Patents

Structure de blanchet pour impression numerique

Info

Publication number
EP0840677A1
EP0840677A1 EP96921548A EP96921548A EP0840677A1 EP 0840677 A1 EP0840677 A1 EP 0840677A1 EP 96921548 A EP96921548 A EP 96921548A EP 96921548 A EP96921548 A EP 96921548A EP 0840677 A1 EP0840677 A1 EP 0840677A1
Authority
EP
European Patent Office
Prior art keywords
layer
carcass
adhesive
withstand
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96921548A
Other languages
German (de)
English (en)
Other versions
EP0840677A4 (fr
Inventor
Francesco Castelli
Giampietro Invernizzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reeves Brothers Inc
Original Assignee
Reeves Brothers Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reeves Brothers Inc filed Critical Reeves Brothers Inc
Publication of EP0840677A1 publication Critical patent/EP0840677A1/fr
Publication of EP0840677A4 publication Critical patent/EP0840677A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B29K2105/165—Hollow fillers, e.g. microballoons or expanded particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/767—Printing equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/105—Ceramic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2319/00—Synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/10—Location or type of the layers in multi-layer blankets or like coverings characterised by inorganic compounds, e.g. pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds

Definitions

  • the present invention relates to a digital printing blanket carcass which is capable of withstanding the relatively high temperatures that are experienced during various digital transfer techniques such as is involved in the electrostatic imaging of liquid or powder toners in or photocopiers or digital printing devices.
  • Electrostatic imaging of liquid or solid toner materials is well-known in the art as a convenient method for printing or copying text.
  • the images are typically generated on a drum, moved to a heated member, and then transferred to the final substrate.
  • U.S. patent 5,089,856 discloses an imaging system which includes a transfer member for transferring toner images from an image bearing surface to a substrate.
  • a transfer member for transferring toner images from an image bearing surface to a substrate.
  • the transfer member should be able to withstand temperatures of as high as about 130 to 150°C.
  • Such transfer layers are often manufactured separately by the imaging machine manufacturer so that the appropriate performance requirements are met, i.e., that the transfer layer is resistant to the heating temperatures and is also suitable for carrying and transferring the toner particles from the drum to the substrate.
  • Such transfer layers require a carcass or support so that they can be properly mounted onto the printing machine as well as to provide or impart the necessary properties such as compressibility and resilience to the transfer layer.
  • Such carcasses must also be resistant to the high temperatures that are encountered in this type of printing system.
  • the present invention provides a new carcass construction which is highly suitable for use in connection with such transfer layers.
  • the present invention relates to a digital printing blanket carcass for supporting a transfer layer having an outer surface which is capable of transferring electrostatic particles.
  • This carcass includes an upper layer of a resilient material, a compressible layer, and a fabric layer of a fiber material; each of which can withstand a temperature of up to about 150°C.
  • either of the top layer or compressible layer comprises silicone rubber, hydrogenated nitrile rubber, an acrylic rubber or a fluoroelastomer
  • the compressible layer further includes a plurality of open or closed cells therein
  • the fiber of the fabric layer comprises carbon, boron, a metal, fiberglass, a polyimide, or an aromatic polyamide.
  • the elastomeric material of the top layer and compressible layer is the same to facilitate the joining of these layers. If necessary, a layer of an adhesive which can withstand a temperature of up to about 150°C can be applied for securing the upper layer to the compressible layer.
  • the fabric layer is woven and the carcass includes means for mounting the carcass onto a rotatable cylinder.
  • the mounting means may be a layer of an adhesive which can withstand a temperature of up to about 150°C and a layer of a polymer film for protecting the adhesive layer.
  • a silicone adhesive layer is preferred.
  • the digital printing blanket 10 of the present invention includes several layers which laminated or otherwise processed into a single unitary structure. For convenience in understanding the invention, each of these layers, together with their associated features, will be discussed below in turn.
  • the terms “bottom”, “lower” and the like are used to refer to that portion of a layer which is most nearly adjacent the device upon which the blanket of the invention is installed. Conversely, the “top” or “upper” portion of a layer is that portion thereof which is located or positioned furthest from the device.
  • the uppermost layer of this blanket 10 is a member 15 for transferring an electrostatic image of toner particles from an image bearing surface to a substrate.
  • a typical transfer member is illustrated in U.S. patent 5,089,856. This transfer member can be made by the printing apparatus manufacturer so that it is specifically designed and adapted for the particular toner and electrostatic imaging apparatus that is utilized.
  • the most preferred transfer member 15 is manufactured by Indigo NV, Wobum, MA for use in their digital printing machines. This transfer member is proprietary to Indigo and is simply laminated conventionally onto the carcass 20 of the present invention. If desired, a high temperature adhesive such as a silicone adhesive can be used to secure the transfer member to the carcass.
  • the present invention relates to the carcass 20 for supporting the transfer member 15.
  • a common feature which is present in the various layers of the carcass 20 is that each has sufficient heat resistance to withstand a temperature of about 150°C.
  • heat resistance what is meant is that the material retains its mechanical characteristics such as tensile strength, elongation, hardness and tear resistance without substantial deterioration at the desired temperature, which for this invention is at least about 150°C.
  • the carcass 20 is comprised of a high temperature resilient layer 25 and an adhesive layer 30 for securing the carcass 20 to the printing apparatus.
  • the adhesive layer 30 is applied to the lowermost surface of the carcass.
  • the adhesive which is used is preferably one which is compatible with the carcass material and the printing apparatus so that it can secure the blanket 10 in position as desired.
  • the adhesive will be a silicon or fluorocarbon material to resist the relatively high temperatures that occur when the transfer member or the apparatus is heated.
  • a preferred silicon adhesive is available from Dow Corning and is known as No. Q2/7406.
  • the adhesive is applied to a thickness of about 0.01 to 0.05 mm, and preferably at about 0.03 mm.
  • a polymer film 35 is applied over the adhesive.
  • This film which can be made of any polyolefin and is most preferably polyethylene or a polyester material, is applied in such a manner that it can be peeled away or otherwise removed from the adhesive before the carcass is secured to the printing apparatus.
  • the printing apparatus is typically aluminum or some other metal because the apparatus is usually heated to assist in providing the proper temperature for the transfer of toner particles from the imaging apparatus to the substrate.
  • a typical polyester film is available from H.P. Smith Inc. and is known as DP 5648. This film is present at a thickness of about 0.5 to 1 mm, preferably about 0.77 mm. Since this film is removed before the carcass 20 or blanket 10 is placed into service, there is no need for the film to have high temperature resistance properties like the other layers of the carcass and blanket.
  • the resilient layer 25 has three components: a fabric base 40, a compressible layer 45 and a high temperature resistant resilient top layer 50.
  • the fabric base includes one or more relatively high temperature resistant fibers, and is used to support the other layers.
  • the fibers may be in the form of a continuous filament, strand or yarn, as a mat, or preferably, as a structure of woven filaments. Many different types of fibers may be used for this layer. Suitable fiber materials include carbon, boron, fiberglass, high temperature resistant plastics or any of a wide variety of metals or alloys.
  • the high temperature aromatic polyamide or polyimide plastics are preferred.
  • any of the cited materials can be used, preferably in the form of a woven fabric or cloth and at a thickness of between about 0.1 to 0.5 mm and preferably about 0.15 to 0.3 mm.
  • the most advantageous material as far as performance, cost and availability is concerned is a woven fabric or cloth and at a thickness of between about 0.1 to 0.5 mm and preferably about 0.15 to 0.3 mm.
  • NOMEX fabric which is available from DuPont, Wilmington, DE. This fabric has a thickness of 0.21 mm, with 20 warp threads and 19 fill threads. NOMEX is basically an aromatic polyamide that chars at 420°C, so that it has the required high temperature resistance for use in this layer.
  • a compressible layer 45 On the upper side of the fabric layer 40 is applied a compressible layer 45. Any one of a wide variety of compressible layers can be used. The temperature resistance of the compressible layer must also be sufficiently high to withstand the anticipated operating conditions.
  • fabric 40 may be spread coated, calendared, dipped or otherwise contacted, upon its upper surface with a matrix material which includes microspheres therein.
  • Suitable matrix materials include those thermoplastic or thermosetting resins, polyurethanes, and natural or synthetic elastomers which are resistant to a temperature of 150°C.
  • thermoplastic or thermosetting resins include those thermoplastic or thermosetting resins, polyurethanes, and natural or synthetic elastomers which are resistant to a temperature of 150°C.
  • Elastomers are preferred for use as the matrix material.
  • Useful elastomeric materials for matrix of the compressible layer 45 include acrylonitrile rubber, acrylic rubber or silicon rubber or an elastomer or plastic made from a fluorocarbon material.
  • the elastomers best suited for this invention are the hydrogenated nitrile or acrylic rubbers. These elastomers are preferably applied to the fabric by a solvent carrier.
  • the matrix material additionally contains a plurality of cells therein in an amount sufficient to impart increased compressibility to the layer. These cells may be closed cells formed with the use of the microspheres.
  • microspheres are formed from materials such as, e.g., thermoplastic resins, thermosetting resins, ceramics, glass and sintered metals. There is no particular concern as to the temperature resistance of these microspheres, since they are converted into cells or voids in the matrix material prior to use of the carcass and blanket. Of course, the curing of the compressible layer will depend upon the type and melting temperature of the particular microspheres used.
  • a preferred thermosetting resin for forming the microspheres used in the invention is a phenolic resin having a density of between about 0.01 and 0.05 grams per cubic centimeter.
  • the microspheres range in diameter between about 1-200 and preferably 50-130 microns, with an average size of about 90 ⁇ being most preferred.
  • the microsphere loaded material described herein will form the desired thickness of the layer.
  • the compound is applied to fabric to form the compressible layer thereupon by depositing a number of thin layers of about 0.002 mm in successive applications.
  • the microspheres are uniformly distributed throughout the elastomer in such a way as to avoid any appreciable crushing of the microspheres.
  • the microspheres are incorporated in the elastomeric material at a loading of about 4 - 90% and preferably 10 - 70% of the solid contents. This percentage will vary based on such factors as microsphere dimension, wall thickness and bulk density, or if blowing agents are additionally incorporated within the matrix.
  • any of a wide variety of microspheres can be added to a solution or dispersion of the matrix. If solvent solutions are utilized, the selected microspheres must be resistant to chemical attack from the solvents.
  • thermoplastic microspheres for use with the present invention are marketed, for example, by EXPANCEL and Pierce & Stevens.
  • Microspheres of a thermoset resin are preferred for this embodiment. Most preferred are those formed of a phenolic resin having a density of between about 0.2 and 0.03 gms/cc and most preferably about 0.023 gms/cc.
  • the thus coated fabric is then, for example, passed over hot cans or festooned or passed through an oven at a temperature sufficient to cause complete expansion of the microspheres so that the compressible layer is secured to the fabric.
  • the heating step described above may be eliminated.
  • the microspheres may further include a coating thereon to facilitate their bonding with the matrix material.
  • cells may be formed in the matrix by mechanically inducing air into a matrix forming material before it is applied to the fabric, such as by aerating or stirring.
  • Another means of creating cells is to use chemical blowing agents (the term foaming agents also is used) that are decomposable into gases as they are cured in a compound.
  • foaming agents are the CELLOGENSTM which are manufactured by Uniroyal (CELLOGEN is a registered trademark of Uniroyal) .
  • CELLOGENS are decomposable in the presence of heat, which may be applied during curing.
  • Many other types of blowing agents are commercially available with a wide range of decomposition characteristics, such as those set forth in U.S. patent No. 4,548,858 to Meadows, the disclosure of which is expressly incorporated herein by reference.
  • Compressible layer may be separately formed and adhered to the fabric with, for example, the use of a layer of a suitable adhesive which is compatible with both the compressible layer and the top resilient layer.
  • This adhesive can be a compounded nitrile rubber but a variety of water and solvent based elastomeric adhesives, which are well known in the art may be used, if desired, in its place.
  • the particular adhesive will depend upon the specific material utilized to form the top layer 50. Bonding of the compressible layer may alternately or additionally be effected by a chemical reaction occurring between fabric 40 and the compound triggered during the subsequent curing process.
  • the adhesive should be resistant to at least about 150°C in order to withstand the anticipated operating temperatures for the carcass and blanket.
  • Another method for preparing the compressible layer is the well-known salt leaching process as disclosed, e.g., in U.S. Patent 4,422,895, the disclosure of which is expressly incorporated herein by reference. It is this procedure which is preferred for making the compressible layer of the present invention.
  • This compressible layer is directly applied to the fabric 40 at a thickness of between about 0.15 to 0.8 mm, and preferably at about 0.036 mm.
  • a top layer 50 of a high heat resistant resilient material On the uppermost portion of the compressible layer is applied a top layer 50 of a high heat resistant resilient material.
  • "Resilient” means that the material is capable of being expanded or compressed while still being able to return to substantially its initial configuration. This layer preferably retains it ⁇ resiliency up to a temperature of approximately 150°C.
  • top layer 50 Useful materials for top layer 50 include hydrogenated nitrile rubber, acrylic rubber or silicon rubber or an elastomer or plastic made from a fluorocarbon material. This layer typically has a thickness of between about 0.01 and 0.5 mm, and preferably about 0.05 to 2 mm. Depending upon the selection of the particular material for the top layer 50 as well as that which is selected for the compressible layer 45, it may be necessary to utilize an adhesive to secure the top layer to the compressible layer. As noted above, the preferred adhesive for use at the relatively high temperatures expected would be one that is based on a silicone material.
  • the preferred material for the top layer 50 is a hydrogenated nitrile rubber such as THERBAN 1746S which is available from Bayer or ZETPOL 2020L which is available from Nippon Zeon. This layer is applied at a thickness of about 0.1 mm.
  • the preferred method of manufacturing of the present carcass includes the following steps.
  • the compressible layer 45 of a hydrogenated nitrile rubber is applied to the fabric 40 in a solvent solution by spread coating followed by a conventional salt leaching process to create open cells therein.
  • the compressible layer is cured in a conventional manner.
  • a top layer of a hydrogenated nitrile rubber is applied onto the compressible layer by spread coating and is also cured conventionally.
  • the top layer is then buffed with sandpaper to the final thickness.
  • the carcass is turned over and an adhesive is spread onto the bottom of the fabric layer; A polyester film is applied upon the adhesive in a final operation.
  • This product is then shipped to the printing machine manufacturer, who applies the appropriate transfer layer upon the top layer.
  • the blanket can then be mounted upon a printing apparatus by removing the film and applying the adhesive coated fabric side to the metal base of the printing device.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

La présente invention concerne une structure de blanchet (25) pour impression numérique, conçue pour porter une couche de transfert (15) présentant une surface externe capable de transférer des particules électrostatiques. Cette structure (25) comporte une couche supérieure faite d'un matériau élastique (50) qui peut supporter des températures allant jusqu'à environ 150° C, tel que du caoutchouc silicone, du caoutchouc de nitrile hydrogéné, du caoutchouc acrylique ou un fluoroélastomère. Cette structure comprend également une couche compressible (45) faite d'un matériau matriciel élastomère, lequel comporte plusieurs cellules ouvertes ou fermées, ainsi qu'une couche de tissu (40) faite d'un matériau fibreux pouvant supporter des températures allant jusqu'à environ 150° C, tel que du carbone, du bore, un métal, de la fibre de verre, un polyimide, ou un polyamide aromatique.
EP96921548A 1995-06-16 1996-06-12 Structure de blanchet pour impression numerique Withdrawn EP0840677A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US2887 1987-01-13
US288795P 1995-06-16 1995-06-16
PCT/US1996/010134 WO1997000169A1 (fr) 1995-06-16 1996-06-12 Structure de blanchet pour impression numerique

Publications (2)

Publication Number Publication Date
EP0840677A1 true EP0840677A1 (fr) 1998-05-13
EP0840677A4 EP0840677A4 (fr) 1998-09-16

Family

ID=21703033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96921548A Withdrawn EP0840677A4 (fr) 1995-06-16 1996-06-12 Structure de blanchet pour impression numerique

Country Status (5)

Country Link
EP (1) EP0840677A4 (fr)
JP (1) JPH11507747A (fr)
AU (1) AU6275296A (fr)
IL (1) IL122608A (fr)
WO (1) WO1997000169A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809666B1 (fr) 2000-05-31 2003-03-14 Rollin Sa Procede de fabrication d'un blanchet d'impression multicouches et blanchet ainsi obtenu
FR2809665B1 (fr) * 2000-05-31 2003-03-14 Rollin Sa Procede de fabrication d'un blanchet d'impression comportant une couche au dos en un materiau polymere et blanchet ainsi obtenu
FR2809667B1 (fr) * 2000-05-31 2003-03-14 Rollin Sa Procede de fabrication d'un blanchet d'impression et blanchet ainsi obtenu
DE10036805A1 (de) 2000-07-28 2002-02-07 Tesa Ag Verfahren zur Ummantelung von langgestrecktem Gut, wie insbesondere Kabelsätzen
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CN1938162B (zh) * 2004-03-30 2011-06-01 旭化成电子材料株式会社 中空圆柱状印刷元件及其生产方法、中空圆柱状芯材料
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EP0479591A1 (fr) * 1990-10-04 1992-04-08 PT Sub, Inc. Blanchet d'impression contenant un tissu considérablement étiré
EP0613791A2 (fr) * 1993-03-03 1994-09-07 W.R. Grace & Co.-Conn. Blanchet multicouche sans couture et son procédé de fabrication

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Also Published As

Publication number Publication date
WO1997000169A1 (fr) 1997-01-03
JPH11507747A (ja) 1999-07-06
EP0840677A4 (fr) 1998-09-16
AU6275296A (en) 1997-01-15
IL122608A (en) 2000-06-29
IL122608A0 (en) 1998-08-16

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