US3668058A - Matrix material for production of plastic printing plates - Google Patents

Matrix material for production of plastic printing plates Download PDF

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Publication number
US3668058A
US3668058A US3668058DA US3668058A US 3668058 A US3668058 A US 3668058A US 3668058D A US3668058D A US 3668058DA US 3668058 A US3668058 A US 3668058A
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United States
Prior art keywords
matrix material
sheet
production
printing plates
impregnated
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Expired - Lifetime
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English (en)
Inventor
Nicholas J Pappadakis
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Evonik Corp
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Tenneco Chemicals Inc
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Assigned to NUODEX INC., A CORP OF DE. reassignment NUODEX INC., A CORP OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: TENNECO CHEMICALS, INC.
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/908—Impression retention layer, e.g. print matrix, sound record
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31859—Next to an aldehyde or ketone condensation product
    • Y10T428/31877—Phenol-aldehyde
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer
    • Y10T428/31917—Next to polyene polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31942—Of aldehyde or ketone condensation product
    • Y10T428/31946—Next to second aldehyde or ketone condensation product

Definitions

  • ABSTRACT A matrix material comprises a sheet of fibrous cellulosic material impregnated with a thermosetting resin, a coating of a thermosetting resin on one surface of said sheet. and a precast sheet of polypropylene film affixed to the coated side of the impregnated cellulosic sheet with an adhesive.
  • duplicate printing plates are important to that segment of the printing industry that concerns itself with the printing of newspapers, magazines, brochures and the like, which are advantageously printed on a rotary press and which often require the use of several presses to fulfill the requirements of a specific job.
  • Duplicate plates have many well known advantages over original printing material in that their printing characteristics can be made equal to or better than those of the original by quality control; they are easily replaced; they relieve the original from press-wear; and they can be curved without difficulty to meet the needs of the rotary press.
  • One method of preparing duplicate plates is by stereo-typing which generally involves the following processing steps: The original type is locked into a steel frame which is called a chase.
  • the sheet takes an impression from the type, thereby forming a mold or matrix.
  • Molten lead is poured into the matrix, cooled and hardened, and removed from the matrix as the duplicate plate. Variations of this process are accomplished by using, in place of the lead, sheet rubber, sheet plastic, or other plastic compositions. In these processes sheets or rubber or plastic are pressed against the matrix, or the plastic compositions are cast in the matrix to form duplicate plates.
  • polyester resins are polyester resins.
  • the known flong materials such as cellulosic materials impregnated with phenolic resins, are not capable of producing high quality curved printing plates when they are used as the matrix for polyester resins.
  • Problems of fidelity in reproduction from engravings, type forms, combination forms, and wood-or metal-mounted originals and patterns have arisen. in addition excessive shrinkage, warping, nonuniformity of floor and relief and type damage have occurred which cause difficulties with the matrices themselves and lead to poor fidelity in the duplicate plates.
  • the matrix material must not only be such that it can be readily contoured under the heat and pressure used in preparing the matrix from the original plate, but it must also have a high enough heat distortion point so that it will not distort during this process. It must also have the property of releasability, so that duplicate plates made of polyester resin will be readily released after molding without adhering or sticking and preferable without the necessity for using mold release agents.
  • a further object is to provide a matrix material which can be molded with a minimum of shrinkage and warping, which will have a uniform floor and relief, and which will be of a soft enough composition to avoid type damage.
  • a matrix material which comprises a sheet of fibrous material impregnated with a thermosetting resin, a coating of a thermosetting resin on one surface of said sheet, and a preformed sheet of polyolefin film attached to the coated surface of said fibrous sheet.
  • the matrix material shown in the drawing is a board-like laminated material consisting of a base, which is a sheet of cellulosic material impregnated with a phenolic resin, which has been coated with a phenolic resin and a sheet of polypropylene film which has been affixed to the coated surface of the base with an adhesive.
  • the base that is used in the preparation of the novel matrix materials is a sheet of fibrous material which may be made up of cellulose fibers as shown in the drawing or of other material or synthetic fibers, such as cotton, hemp, wool, rayon, polyamide, or polyester fibers. It is generally preferred that the base be prepared from a cellulose material that contains both short and long pulp stock fibers.
  • the base is impregnated with a thermosetting resin, such as a phenol-formaldehyde resin, a urea-formaldehyde resin, a melamine-formaldehyde resin, an aniline-formaldehyde resin, and alkyd resin, or the like. In most cases resins of the phenol-formaldehyde type are preferred.
  • thermosetting resins such as rosin and copal, and novolaks may, if desired, be substituted fora portion of the thermosetting resin.
  • the thermosetting resin content of the impregnated base is generally from about 35 percent to 65 percent in terms of saturation of the base and is preferably 45 percent to 55 percent.
  • the thickness of the impregnated base layer may be between 0.05 inch and 0.30 inch and is preferably between 0.07 inch and 0.10 inch.
  • the impregnated base is coated'with a thermosetting resin that may be the same resin as that used to impregnate the base or a different thermosetting resin.
  • the preferred resin for coating the impregnated base is a general purpose, two-stage, mineral and woodflourfilled, low pressure molding phenol-for maldehyde resin possessing a fast cure and a long flow.
  • the thickness of the coating may range from 0.002 inch to 0.040 inch and is preferably 0.005 inch to 0.020 inch.
  • thermoplastic polyolefin film To the coated side of the impregnated base is affixed a preformed film of a polyolefin resin. It is necessary that the polyolefin resin be applied as a preformed film or'sheet rather than by spraying the surface of the coated base with a solution of the polyolefin becausethe spray-'on'route does not provide a satisfactory distortion-free matrix material.
  • a thermoplastic polyolefin film must be affixed to a thermosetting resin coated base that has been impregnated with a thermosetting resin.
  • the polyolefin f lm that is affixed to the coated impregnated fibrous base may be a film of an polymer consisting of a-olefin units having from 2 to 8 carbon atoms, such as polyethylene, polypropylene, or polybutylene.
  • the useful polyolefins have flow rates as determined by ASTM Method D 1238 65 T in the range of 12 to 24.
  • the preferred polyolefin is polypropylene which has a flow rate of about 16.
  • one side of the polyolefin film is usually primed or subjected to flame treatment, treatment with an electrical discharge, or treatment with ozone or other oxidizing agent before it is brought into contact with the adhesive.
  • the adhesive that is used to bond the polyolefin film to the coated impregnated fibrous base is usually a solution of an organic polymer and fillers in an organic solvent.
  • the preferred adhesives are those prepared from thermoplastic polymers, such as polyvinyl acetate, polyvinyl formal, polyvinyl butral, polyvinyl alcohol, polyvinyl alkyl ethers, polystyrene, styrene butadiene copolymers, homopolymers and copolymers derived from acrylic acid, methacrylic acid, lower alkyl acrylates, lower alkyl methacrylates, alkyl 2 cyanocrylates, acrylonitrile, methacrylamide,
  • Example 1 The following procedure was used to prepare the matrix material of this invention:
  • the adhesive that was applied to thepolypropylene film was a dispersion of an acrylonitrile-butadiene copolymer in methyl isobutyl ketone. This adhesive had the following properties:
  • Viscosity (Brookfield Model LVF at 30 rpm, l80250 cps. No. 2 Spindle at 72 F.)
  • a coating machine equipped with gravure rollers was used to apply the adhesive and mayer rods were used to smooth the adhesive layer.
  • the adhesive-coated polypropylene was passed through a two-zone drying chamber to remove the solvent from the adhesive and then cooled on a chiller roll.
  • a sheet of cellulosic material made up of short and long pulp stock fibers was impregnated with a general purpose, two-stage, mineral and woodfiour filled phenol-formaldehyde resin.
  • the amount of resin added to the cellulose sheet was about 50 percent of the amount that would completely saturate it.
  • the phenolic resin impregnated cellulose base was then coated with a 20 percent solution of the same phenol-formaldehyde resin in ethanol. Automatic spray equipment was used to apply a uniform to 12 mil coating .of the phenolic resin to the impregnated'cellulose base.
  • the coated base was placed on a rack which was inserted into acirculating air oven at l90F for 45 minutes to remove the ethanol. It was then placed on a platen heated at 295F for 2 minutes to effect a partial cure of the phenolic resin, that is, to bring the phenolic resin to the 3" stage.
  • the adhesive-coated polypropylene film was brought into contact with the coated surface of the impregnated cellulose base and heated to form the novel matrix material.
  • polypropylene and base layers of the matrix material were formed into a lay-up or sandwich prior to heating. This lay-up was made up of the following consecutive layers:
  • the resulting matrix material was about 0.085 inch thick and provided a 0.035 inch floor. It did not shrink on molding and its floor was more uniform than that of previously-known matrices.
  • Example 2 The following procedure was used to demonstrate the use of the matrix material of this invention in the preparation of polyester printing plates:
  • Example 2 An original printing plate with no release coating was contacted with a matrix material prepared by the procedure of Example 1.
  • the plate and matrix material were inserted into a hydraulic press and preheated at 290F. for one minute under no pressure but with the platens closed. A pressure of 200-500 psi was applied for nine minutes. The plate and matrix were removed from the press. After cooling, the matrix was separated from the original plate.
  • the matrix was placed on the bottom platen of a hydraulic two platen press with both platens maintained'at 180F.
  • a dam of putty was constructed around the perimeter of the matrix.
  • a shim of sufficient thickness to form a polyester plate of the desired thickness was also placed around the perimeter of the matrix.
  • a polyester resin containing a curing catalyst was poured into the dammed area.
  • the tap platen was brought into contact with the shim and maintained at 180F. for less than 15 minutes.
  • the plate was cooled while it was in contact with the matrix, and it was then separatedfrom the matrix.
  • the resulting polyester printing plate had excellent printing characteristics in terms of fidelity, finescreen half tone dots, and printability.
  • an adhesive layer that has a thickness between about 0.5 mil and 1.0 mil and that comprises a thermoplastic resin selected from the group consisting of polyvinyl alcohol; polyvinyl acetate; polyvinyl formal; polyvinylbutyrate; polyvinyl alkyl ethers; polystyrene; styrenebutadiene copolymers; acrylonitrile-butadiene copolymers; homopolymers of acrylic acid, methacrylic acid, lower alkyl acrylates, lower alkyl methacrylates, acrylonitrile, methacrylonitrile, alkyl Z-cyanoacrylates, acrylamide, and methacrylamide; and copolymers of acrylic acid or methacrylic acid with butadiene, vinyl acetate, vinyl chloride, or vinylidene chloride.
  • a thermoplastic resin selected from the group consisting of polyvinyl alcohol; polyvinyl acetate; polyvinyl formal; polyvinylbutyrate; polyviny
  • thermosetting resin on one side of the impregnated sheet is 0.005 inch to 0.020 inch thick.
  • the sheet of polyolefin resin is a precast polypropylene film.

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  • Laminated Bodies (AREA)
  • Reinforced Plastic Materials (AREA)
US3668058D 1969-07-31 1969-07-31 Matrix material for production of plastic printing plates Expired - Lifetime US3668058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84634169A 1969-07-31 1969-07-31

Publications (1)

Publication Number Publication Date
US3668058A true US3668058A (en) 1972-06-06

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Application Number Title Priority Date Filing Date
US3668058D Expired - Lifetime US3668058A (en) 1969-07-31 1969-07-31 Matrix material for production of plastic printing plates

Country Status (5)

Country Link
US (1) US3668058A (enrdf_load_stackoverflow)
CH (1) CH518175A (enrdf_load_stackoverflow)
DE (1) DE2037989A1 (enrdf_load_stackoverflow)
FR (1) FR2053361B1 (enrdf_load_stackoverflow)
GB (1) GB1254405A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824926A (en) * 1972-08-18 1974-07-23 Yamauchi Rubber Ind Co Inc Printing magnetic saddle
US4075420A (en) * 1975-08-28 1978-02-21 Burroughs Corporation Cover layer for flexible circuits
US4154888A (en) * 1976-10-04 1979-05-15 Frank Dewey Rigid composite articles
US5272006A (en) * 1991-08-29 1993-12-21 Lydall, Inc. Matrix board material and mold and a method for making printing plates therefrom
US5895542A (en) * 1994-11-23 1999-04-20 Appleton Papers Incorporated Coater and a method for coating a substrate
US5919842A (en) * 1997-05-16 1999-07-06 Mounsey; Gerald W. Water-based latex phenolic coating composition
US20040209097A1 (en) * 2002-02-06 2004-10-21 Willham John Edward Christopher Polyester or copolyester/polyolefin laminate structures and methods of making the same
US20050140064A1 (en) * 2003-11-13 2005-06-30 Paul Jorn Method and apparatus for activating the binder on a semi-finished fiber preform by direct heating of carbon fibers through an applied electrical voltage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703051A (en) * 1949-02-25 1955-03-01 News Syndicate Co Inc Matrix for production of plastic printing plates
US3001899A (en) * 1956-04-16 1961-09-26 Kimberly Clark Co Stereotype mat
GB1083307A (en) * 1964-10-20 1967-09-13 Domtar Ltd Laminates
US3403071A (en) * 1963-12-06 1968-09-24 Formica Int Laminated plastics and method of making same
US3505083A (en) * 1967-01-03 1970-04-07 Owens Illinois Inc Packaging and a method of packaging perishable comestibles for refrigeration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703051A (en) * 1949-02-25 1955-03-01 News Syndicate Co Inc Matrix for production of plastic printing plates
US3001899A (en) * 1956-04-16 1961-09-26 Kimberly Clark Co Stereotype mat
US3403071A (en) * 1963-12-06 1968-09-24 Formica Int Laminated plastics and method of making same
GB1083307A (en) * 1964-10-20 1967-09-13 Domtar Ltd Laminates
US3505083A (en) * 1967-01-03 1970-04-07 Owens Illinois Inc Packaging and a method of packaging perishable comestibles for refrigeration

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824926A (en) * 1972-08-18 1974-07-23 Yamauchi Rubber Ind Co Inc Printing magnetic saddle
US4075420A (en) * 1975-08-28 1978-02-21 Burroughs Corporation Cover layer for flexible circuits
US4154888A (en) * 1976-10-04 1979-05-15 Frank Dewey Rigid composite articles
US5272006A (en) * 1991-08-29 1993-12-21 Lydall, Inc. Matrix board material and mold and a method for making printing plates therefrom
US5895542A (en) * 1994-11-23 1999-04-20 Appleton Papers Incorporated Coater and a method for coating a substrate
US5919842A (en) * 1997-05-16 1999-07-06 Mounsey; Gerald W. Water-based latex phenolic coating composition
US20040209097A1 (en) * 2002-02-06 2004-10-21 Willham John Edward Christopher Polyester or copolyester/polyolefin laminate structures and methods of making the same
US7037576B2 (en) * 2002-02-06 2006-05-02 Eastman Chemical Company Polyester or copolyester/polyolefin laminate structures and methods of making the same
US20050140064A1 (en) * 2003-11-13 2005-06-30 Paul Jorn Method and apparatus for activating the binder on a semi-finished fiber preform by direct heating of carbon fibers through an applied electrical voltage
US7964131B2 (en) * 2003-11-13 2011-06-21 Airbus Deutschland Gmbh Method and apparatus for activating the binder on a semi-finished fiber preform by direct heating of carbon fibers through an applied electrical voltage

Also Published As

Publication number Publication date
GB1254405A (en) 1971-11-24
CH518175A (fr) 1972-01-31
FR2053361A1 (enrdf_load_stackoverflow) 1971-04-16
DE2037989A1 (enrdf_load_stackoverflow) 1971-02-11
FR2053361B1 (enrdf_load_stackoverflow) 1973-03-16

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AS Assignment

Owner name: NUODEX INC.; TURNER PLACE, PISCATAWAY, NJ. 08854

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TENNECO CHEMICALS, INC.;REEL/FRAME:004120/0362

Effective date: 19821222