WO1992008839A1 - Impression par transfert - Google Patents

Impression par transfert Download PDF

Info

Publication number
WO1992008839A1
WO1992008839A1 PCT/GB1990/001989 GB9001989W WO9208839A1 WO 1992008839 A1 WO1992008839 A1 WO 1992008839A1 GB 9001989 W GB9001989 W GB 9001989W WO 9208839 A1 WO9208839 A1 WO 9208839A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
coating
transfer
dye
composition according
Prior art date
Application number
PCT/GB1990/001989
Other languages
English (en)
Inventor
David George Walters
Original Assignee
Brandywine Motifs Limited
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 Brandywine Motifs Limited filed Critical Brandywine Motifs Limited
Priority to EP91901877A priority Critical patent/EP0591160A1/fr
Publication of WO1992008839A1 publication Critical patent/WO1992008839A1/fr
Priority to GB9309588A priority patent/GB2265572A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/003—Transfer printing
    • D06P5/004—Transfer printing using subliming dyes
    • D06P5/005—Transfer printing using subliming dyes on resin-treated fibres

Definitions

  • the present invention relates to the printing of images, and in particular, but not exclusively to sublimatic transfer printing.
  • Previously proposed sublimatic transfers are used on man-made fabrics, in particular polyester. They are formed by printing an image in sublimatic dye on to a paper carrier or substrate. The image may be formed on the substrate by screen printing, for instance. In order to transfer the image to the fabric, the face of the substrate which bears the image is placed against the fabric surface. Pressure is then applied at elevated temperature, for instance by means of a heated press. This causes the dye on the substrate to undergo sublimation, changing to a gas which impregnates the fabric fibres, where the dye solidifies on cooling. The resultant image is extremely durable by virtue of the impregnation of the dye into the fibres, and is vivid.
  • the present invention seeks to obviate or mitigate these and other disadvantages of the prior art.
  • the invention provides a coating composition for use in coating an image to be printed, and comprising a solvent, a resin, a mineral oil and a powder material.
  • compositions for use in sublimatic transfer printing comprising an adhesive component and the material or materials of the composition being so chosen as to be receptive to sublimatic dye transferred thereto by sublimation, and to be adherable to a surface to be printed, thereby binding the dye to the surface to form an image thereon.
  • the composition may comprise a thermoplastic resin such as a polyurethane or acrylic resin.
  • the resin may be n-butyl methacrylate.
  • the composition may also include a solvent.
  • the solvent may be a mineral spirit.
  • the mineral spirit may be a dilute benzene based solvent.
  • the solvent may comprise white spirit, cyclohexanone and/or 1 -methoxy-2-propanol .
  • the composition preferably also includes a plasticizer.
  • the plasticizer may be a phthalate such as butyl benzyl phthalate.
  • the composition when the image is to be formed on a fabric, the composition includes a lubricant for affecting the feel of- the transfer after application to the fabric.
  • the lubricant may comprise oleine.
  • the aforesaid powder material may be copolyester, polypropylene, polyethylene or copolyamide .
  • the composition may comprise between 20 and 40? ⁇ solvent; between 20 and 0 % n-butyl methacrylate; between 5 and 20? ⁇ mineral oil and between 20 and 35? ⁇ powder m a t e r i a l .
  • the composition may include 30 to 50?o of adhesive component, 1 to 35? ⁇ _ of plasticizer, 10 to 40? ⁇ of mineral spirit and 1 to 1 % of lubricant.
  • the composition may comprise xylene.
  • the invention also provides a sublimatic transfer .
  • a sublimatic transfer comprising a substrate, an image formed by sublimatic dye, and a coating, the coating and the dye being so selected that on heating to a predetermined temperature the dye transfers the image to the coating by sublimation, the resulting transfer being capable of adherence to a surface to be printed, whereby the coating binds the dye to the surface to form an image thereon.
  • the dye image is preferably located between the coating and the substrate.
  • the coating includes sufficient solvent for the adhesive - component to allow removal of the substrate at a temperature in the range 10 to 200 G C.
  • the coating is preferably a composition as set out above ' .
  • the invention provides a method of manufacturing a sublimatic dye transfer, in which an image is formed by sublimatic dye on a substrate, and a coating is applied over the image, the coating being receptive to sublimatic dye transferred thereto by sublimation, and being adherable to a surface to be printed. Sublimation of the dye into the coating may be effected during manufacture.
  • sublimation of the dye is effected by heating.
  • the dye may be heated to a temperature in the range 185 to 215 D C to transfer the image to the coating.
  • the dye is preferably heated for a period of at least ten seconds to transfer the image to the coating.
  • the coating may be applied to said surface at an elevated temperature to cause the coating to adhere to said surface.
  • the elevated temperature may be in the region of 180 to 220 °C preferably around 190 °C.
  • the coating is preferably applied to said surface under pressure to cause the coating to adhere to the surface.
  • the application pressure may be in the region of 7 to 30 psi, preferably around 20 psi.
  • the elevated temperature and pressure are applied for a period of 7 to 25 seconds, preferably around 10 seconds.
  • the coating is preferably a composition as set out above.
  • the invention also provides a method of printing an image on an article, in which the image is copied by a photocopying process onto a backing member, a coating compound is applied over the image on the backing member, the coated surface of the backing member is placed against the article, and conditions are created to cause the image to transfer to the article, the compound being chosen to enhance or permit the transfer of the image from the backing member to the article.
  • the backing member may be a paper sheet.
  • the photocopying process creates an image which is reversed on the backing member in relation to the image.
  • the photocopying process may include a first step in which an original is copied onto an intermediate carrier, and a second step in which the image on the intermediate carrier is copied in reverse onto the backing member.
  • the intermediate member may be transparent, the second step including scanning the image on the intermediate member by viewing the image through the intermediate member.
  • the intermediate member may be a clear acetate sheet.
  • the image to be printed is in colour.
  • the image to be printed may be formed by dyes.
  • the dyes may be sublimatic dyes, for instance.
  • Fig. 1 is a diagrammatic section through a transfer incorporating the coating
  • Fig. 2 is a highly schematic diagram showing the process of Example 3.
  • the coating to be described is intended for use in sublimatic transfer printing on natural fibres such as cotton and cotton mixtures, for example poly/cotton (polyester/cotton).
  • the coating material consists of four components.
  • An acrylic resin preferably n-butyl methacrylate is used as an adhesive component.
  • a polyurethane or other thermoplastic resin could be used.
  • a mineral spirit is incorporated as a solvent for the n-butyl methacrylate which is normally a solid.
  • suitable solvents include ethers, fluorocarbons, hydrocarbons, ketones and nitroparaffins.
  • a plasticizer, preferably a phthalate such as butyl benzyl phthalate is incorporated to improve the handling properties of the coating.
  • the material also includes a lubricant such as oleine or another animal fat derivative, or a mineral oil derivative, or a mixture of such components. This serves to improve the feel ("handle") of the transfer on the fabric .
  • the composition includes 30 to 50?o of n-butyl methacrylate, 1 to 35 % of plasticizer, 10 to 40 % of mineral spirit and 1 to 1 % of lubricant.
  • a composition found to produce acceptable results comprises:
  • the formulation of the coating begins by allowing the n-butyl methacrylate to soak in mineral spirit until it softens and dissolves. Gentle stirring at this stage results in a viscous liquid. The plasticizer and lubricant are then added and the resulting mixture is again stirred to an even consistency. The whole formulation process may take place at room temperature.
  • the coating may be applied to a sublimatic transfer 10 which consists of a paper substrate 12A on which an image 12B has been printed in reverse, using sublimatic dyes and a silk screen or other printing process.
  • the coating -14 is then applied, for instance by roller, over the sublimatic dye image 12B which is therefore trapped between the coating 14 and the paper substrate 12A.
  • the image may be transferred to the coating by heating the transfer. Raising the temperature into the range 185 to 215°C for a period of ten seconds is sufficient to cause the dyes to penetrate the coating by sublimation so that when the transfer is returned-to room temperature, the image is permanently fixed in the coating.
  • the substrate 12A and dyed coating 14, 12B are placed against the fabric to be printed with the coating 14 in contact with the fabric. Elevated temperature and pressure are then applied.
  • the elevated temperature preferably in the range 180 to 220°C, for example 190°C
  • the applied pressure preferably in the range 7 to 30 psi, for example 20 psi
  • the coating performs an adhesive function which adheres the dye to the fabric fibres, thereby binding the image to the fabric.
  • the formulation described above has the further advantage that, by varying the quantity of solvent included in the coating, the adhesive properties can be varied as may be required to apply the method to different fabrics.
  • the adhesiveness is preferably reduced sufficiently to allo the backing paper to be readily removed at room temperature, or at a temperature in the range 10 to 200°C. Room temperature removal is expected to provide significant advantages when the transfers are used in presses for simultaneously printing a plurality of articles.
  • Previously proposed sublimatic transfers required the backing paper to b.e removed before the transfer had cooled, so that a press operator may only have a period of a few seconds in which to remove the backing sheets from all of the transfers which have simultaneously been printed.
  • the coating formulation described above has also been found to increase the shelf-life of sublimatic transfers to which it has been applied. Untreated transfers which tend to degrade as the dyes in the image leach into one another. The presence of the coating is believed to inhibit leaching.
  • the use of the coating to bind the sublimatic dye to the surface to be printed allows sublimatic transfer printing to be extended to surfaces which are wholly inpenetrable by sublimatic dyes.
  • a composition for use as a coating composition is formulated from a solvent, a resin (preferably n-butyl methacrylate), mineral oil and a powder material.
  • the powder may be copolyester, polypropylene, polyethylene or copolyamide.
  • the preferred solvent is based on white spirit and consists of 50 % or more b weight of white spirit.
  • the balance of the solvent mix may substantially wholly comprise cyclohexanone and/or 1-methoxy-2- propanol.
  • the solvent ingredients are first mixed together.
  • the n-butyl methacrylate (a thermoplastic acrylic resin) is then added to the solvent.
  • the solvent causes the resin to soften.
  • the resin and solvent may be mixed in weight ratios between 1:1 and 2:3 approximately.
  • the final formulation consists of approximately 60 softened resin: approximately 13 % mineral oil and 27 % copolyester powder.
  • Xylene may be incorporated as an additional ingredient.
  • the compound can be used by coating onto an image to be printed, such as a conventional sublimatic dye transfer.
  • an image is formed on a backing member such as paper.
  • the image may be printed on the paper, for instance by dyed inks or otherwise.
  • the coated image is then placed against the article to which the image is to be transferred, and appropriate conditions are then created, usually including the application of heat and/or pressure, to cause the compound and the image to transfer to the article.
  • appropriate conditions usually including the application of heat and/or pressure, to cause the compound and the image to transfer to the article.
  • the coating After application, the coating provides ad esion between the image dyes and the article.
  • the coating When the coating is to be used with conventional transfers, the coating may be applied to the transfer during manufacture. The dyes may be encouraged to adhere to coating immediately. The process is them divided into two stages, in which the user completes the second by causing the coating to adhere to the article.
  • a particularly preferred method according to the invention can be used with the composition of Example 1, but preferably the composition of Example 2.
  • the composition is coated on an image formed on paper by a photocopying process, preferably a colour photocopying process.
  • the composition is applied over the image on the colour copy which is then placed in contact with an article.
  • the image is transferred to the article by- applying heat and pressure.
  • the composition described above has been found to allow an image to be transferred from a colour photocopy onto various materials, including synthetic, natural and mixed fibre fabrics.
  • colour photocopy as the basis for printing gives the present invention wide application because any image which can be copied by a colour photocopying process can then be transferred to an article in the way described. Furthermore, the eas availability of colour photocopying machines represents a substantial improvement over techniques involving pre-printed transfers etc. which must be manufactured or ordered in advance.
  • a photocopying machine is designed to reproduce an original without any reversal of the image.
  • a reversed image can be produced by using a two stage photocopying process. This is schematically indicated in Fig. 2.
  • a first stage the image 20 on an original 22 is copied onto a transparent intermediate carrier 24 such as a sheet of clear acetate.
  • the image 20 is shown as an asymmetric image, for clarity.
  • the acetate sheet 24 is then used in place of the original 22 in a second photocopying stage in which the image 20 on the acetate sheet 24 is copied onto paper 26.
  • the acetate sheet 24 is placed on the photocopying machine in reverse as indicated by the arrows 28. That is, the machine scans the image 20 through -the acetate sheet 24 rather than directly.
  • the second copying stage is a colour photocopy 26 of the original, but with the image 20 reversed.
  • the final image produced by the process on an article 30 is a reproduction of the original, without reversal, as indicated at 32.
  • the action of the coating compositions described above when used on photocopies is not fully understood. However, the composition has been found useful with a wide range of types of image, including colour photocopies from various copying processes and other colour images such as those produced by wax crayons. We believe that the compositions are usable with sublimatic dyes and other types of dye and colouring.
  • compositions on photocopied images are as follows. When heat is applied in order to transfer the image from the photocopy to the article, it is believed that the composition may attack binders in the photocopied image, to cause dyes to be released from the backing member. Pressure causes the composition and at least some of the released dyes to remain on the article when the backing member is removed, and the composition then performs an adhesive function to adhere the dyes to the article.
  • compositions which include the acrylic resin n-butyl methacrylate.
  • acrylic resins could be substituted.
  • Polyurethane resins or other thermoplastic resins could also be substituted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Coloring (AREA)

Abstract

Une composition utilisée en impression, y compris l'impression par transfert sublimé, comprend un constituant adhésif choisi de manière à présenter une affinité pour un colorant qui y est transféré, et à pouvoir adhérer à une surface devant être imprimée, liant ainsi le colorant à la surface pour qu'une image y soit produite.
PCT/GB1990/001989 1990-11-09 1990-12-20 Impression par transfert WO1992008839A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91901877A EP0591160A1 (fr) 1990-11-09 1991-06-06 Impression par transfert
GB9309588A GB2265572A (en) 1990-11-09 1993-05-10 Transfer printing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9024389.0 1990-11-09
GB9024389A GB9024389D0 (en) 1990-11-09 1990-11-09 Improvements in or relating to the printing of images

Publications (1)

Publication Number Publication Date
WO1992008839A1 true WO1992008839A1 (fr) 1992-05-29

Family

ID=10685128

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/001989 WO1992008839A1 (fr) 1990-11-09 1990-12-20 Impression par transfert

Country Status (4)

Country Link
EP (1) EP0591160A1 (fr)
AU (1) AU7059091A (fr)
GB (1) GB9024389D0 (fr)
WO (1) WO1992008839A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19805153A1 (de) * 1998-02-09 1999-08-12 Bayer Ag Biologisch abbaubare Beschichtungsmittel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036639A2 (fr) * 1980-03-25 1981-09-30 Doncroft Colors & Chemicals, Inc. c/o Joseph Bancroft & Sons Co., Inc. Impression de tissus par transfert à sec de colorants sublimables
GB2121206A (en) * 1982-06-01 1983-12-14 Jujo Paper Co Ltd Thermal dye-type recording sheet
GB2220008A (en) * 1988-06-24 1989-12-28 Brandywine Motifs Ltd Transfer printing with sublimatic dyes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036639A2 (fr) * 1980-03-25 1981-09-30 Doncroft Colors & Chemicals, Inc. c/o Joseph Bancroft & Sons Co., Inc. Impression de tissus par transfert à sec de colorants sublimables
GB2121206A (en) * 1982-06-01 1983-12-14 Jujo Paper Co Ltd Thermal dye-type recording sheet
GB2220008A (en) * 1988-06-24 1989-12-28 Brandywine Motifs Ltd Transfer printing with sublimatic dyes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Dialog Information Services, File 350, World Patent Index 63-80, Dialog accession no. 001657034, SUMITOMO CHEMICAL KK: "Printing fabrics having little affinity for sublimation dyes - by coating with a resin which has addinity for sublimination dyes using an acrylic acid alkene copolymer inter- meidate layer", JP 51120812 A 761022 7649 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19805153A1 (de) * 1998-02-09 1999-08-12 Bayer Ag Biologisch abbaubare Beschichtungsmittel
US6139764A (en) * 1998-02-09 2000-10-31 Bayer Aktiengesellschaft Biodegradable coating compositions

Also Published As

Publication number Publication date
EP0591160A1 (fr) 1994-04-13
AU7059091A (en) 1992-06-11
GB9024389D0 (en) 1991-01-02

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