GB2349134A - Label sheet assembly - Google Patents

Label sheet assembly Download PDF

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Publication number
GB2349134A
GB2349134A GB9909450A GB9909450A GB2349134A GB 2349134 A GB2349134 A GB 2349134A GB 9909450 A GB9909450 A GB 9909450A GB 9909450 A GB9909450 A GB 9909450A GB 2349134 A GB2349134 A GB 2349134A
Authority
GB
United Kingdom
Prior art keywords
sheet assembly
label
assembly according
substance
label sheet
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Withdrawn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
GB9909450A
Other versions
GB9909450D0 (en
Inventor
James Christopher Body
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.)
Rexam Coated Products Ltd
Original Assignee
Rexam Coated Products Ltd
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 Rexam Coated Products Ltd filed Critical Rexam Coated Products Ltd
Priority to GB9909450A priority Critical patent/GB2349134A/en
Publication of GB9909450D0 publication Critical patent/GB9909450D0/en
Publication of GB2349134A publication Critical patent/GB2349134A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0288—Labels or tickets consisting of more than one part, e.g. with address of sender or other reference on separate section to main label; Multi-copy labels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508—Supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5245—Macromolecular coatings characterised by the use of polymers containing cationic or anionic groups, e.g. mordants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

A label sheet assembly (1) includes a backing sheet (2) and a label layer (3) of natural tracing paper that has an ink-receiving surface (4) and a non ink-receiving surface (5). An adhesive layer (6) is provided on the non ink-receiving surface of the label layer, which mounts the label layer (3) on the backing sheet (2). At least the ink-receiving surface (4) of the label layer (3) includes a combination of a water-soluble cationic substance and a water-soluble binder substance, to improve printing with coloured and pigment-based inks. The cationic substance may be a polyvalent metal salt or an organic polymer. The binder substance may be polyvinylpyrrolidone (PVP) or polyvinyl alcohol (PVOH).

Description

LABEL SHEET ASSEMBLY The present invention relates to a label sheet assembly including a plurality oftransparent paper labels mounted on a backing sheet. In particular, but not exclusively, the invention relates to a label sheet assembly for use with ink jet printers.
Opaque paper labels have been available for many years and are widely used, for example for addressing envelopes. One disadvantage of these labels is that the stark white paper of the label may detract from the appearance of high quality envelopes.
One way of avoiding this problem is to use transparent paper labels. A label sheet assembly that includes a plurality oftransparent paper labels is described in EP 0713379 B 1. Since the colour and texture of the envelope can be seen through the labels, they provide a much improved appearance as compared to opaque labels.
The labels described in EP 0713379 B1 are made of natural tracing paper. This type of paper is not entirely suitable for use with pigment-based inks and coloured inks, which are increasingly used in modem ink jet printers. The labels can therefore suffer from a number of printing problems, such as slow drying times, pigment migration or feather and bleed.
The printed labels may therefore be unsatisfactory and, as a result, the use oftransparent paper labels is declining.
It is an object of the present invention to provide a label sheet assembly that mitigates at least some of the aforementioned disadvantages.
According to the present invention there is provided a label sheet assembly a backing sheet, a label layer of natural tracing paper that has an ink-receiving surface and a non inkreceiving surface, and an adhesive layer provided on the non ink-receiving surface of the label layer that mounts the label layer on the backing sheet, wherein at least the inkreceiving surface of the label layer includes a combination of a water-soluble cationic substance and a water-soluble binder substance.
Treating the ink-receiving surface of the label layer with a combination of a water-soluble cationic substance and a water-soluble binder substance makes the natural tracing paper suitable for use with pigment-based inks and coloured inks. The labels can therefore be used in modem ink jet printers that use these inks without suffering from printing problems such as slow drying times, pigment migration or feather and bleed. The printed labels therefore have a much improved appearance.
It has also been found that treating the label layer with this combination of materials increases the transparency of the labels, further improving their appearance.
The cationic substance may be a water-soluble polyvalent metal salt and is advantageously a salt of a cation from a group consisting of Al3+, Ca2+, Mg2+, Zn2+ and Zr4+, and is preferably aluminiumsulphate, calcium chloride, magnesium acetate, magnesium sulphate, zinc acetate or ammonium zirconium carbonate.
Alternatively, the cationic substance may be a water-soluble organic polymer, advantageously selected from a group consisting of quaternary amine and poly-quaternary amine.
The binder substance may be selected from a group consisting of polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVOH).
The ink-receiving surface of the label layer may include an aqueous preparation of a polymeric substance, which advantageously comprises a paper sizing substance.
Preferably, the polymeric substance is selected from a group consisting of styrene/acrylic ester copolymers and styrene/maleic anhydride copolymers.
The ink-receiving surface of the label layer may include an insoluble absorbent substance, which advantageously includes an organic substance, preferably a non-dissolving starchedbased material. Alternatively, the insoluble absorbent substance may include an inorganic substance, preferably selected from a group consisting of clays, calcium carbonate, talc and silica.
Advantageously, the ink-receiving surface of the label layer includes a combination of substances including by weight magnesium sulphate 5-10%, polyvinylpyrrolidone 10-15%, styrene/acrylic esters copolymer 1-5%, and starch ether 1-5%. Advantageously, the combination of substances is applied to the ink-receiving surface of the label layer at a density of approximately 2.0 g/m2.
The label sheet assembly may be divided into a plurality of labels by a number of die cuts that extend through the label layer and the adhesive layer.
The backing sheet may be provided with a release coating.
The adhesive layer may comprise a layer of a pressure-sensitive adhesive.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which : Figure 1 is a front view of a label sheet assembly with one label partially removed, and Figure 2 is a cross-section on line II-II of Figure 1.
As shown in the drawings, the label sheet assembly 1 includes a backing sheet 2, a label layer 3 that has an ink-receiving surface 4 and a non ink-receiving surface 5, and an adhesive layer 6 provided on the non ink-receiving surface 5 of the label layer, that mounts the label layer 3 on the backing sheet 2. The label layer 3 is divided into a plurality of labels 7 by a number of die cuts 8 that extend through the label layer 3 and the adhesive layer 6, but not the backing sheet 2. The labels 7 may be peeled individually from the backing sheet 2 for attachment to, for example, envelopes.
The backing sheet 2 is provided with a release coating for example of silicone.
Alternatively, the release coating may be flourinated or amine based, or may be any other suitable coating.
The adhesive layer 6 comprises a layer of a pressure-sensitive adhesive. The adhesive should be temperature stable and able to withstand the high temperatures found in many printers and should also be clear. Suitable adhesives include the Nicolmelt P-1834 and L-2274 adhesives, which are manufactured by MalcolmNichol & Co. Inc. Alternatively, any other adhesive that is temperature stable and clear may be used such as, for example, many acrylic based adhesives.
The label layer 3 comprises a sheet of natural tracing paper: that is, paper manufactured from wood-based cellulose fibre pulp, which is mechanically treated, for example by crushing and chopping, to remove any air-fibre interfaces. This renders the paper material translucent. The finished tracing paper is relatively dense and impervious compared with normal opaque papers. Such a tracing paper may typically have a transparency defined by a contrast ratio CO 89 of between 30% and 40%. A definition of the contrast ratio C0 89 is given in EP 0713379 B1. An example of a suitable natural tracing paper is that sold under the trade mark GATEWAY, manufactured by Chartham Paper Mill, Canterbury, Kent, England. In order to improve the receptiveness of the ink-receiving surface to coloured and pigment-based inks, the surface is treated with a combination of a water-soluble cationic substance and a water-soluble binder substance. The cationic substance may be a watersoluble polyvalent metal salt. Preferably the metal salt is a salt of a cation from the group consisting of Al3+, Ca2+, Mg2+, Zn2+ and Zr4+. Examples include aluminium sulphate, calcium chloride, magnesium acetate, magnesium sulphate, zinc acetate and ammonium zirconium carbonate.
Alternative cationic substances include water-soluble organic polymers. Examples include quaternary amine and poly-quaternary amine.
The binder substances may be a polyvinylpyrrolidone (PVP) or polyvinyl alcohol (PVOH).
The combination of materials applied to the ink-receiving surface 4 may also include an aqueous preparation of a polymeric substance. This may be one of a number of proprietary paper sizing materials. Examples of such compositions includes styrene/acrylic ester copolymers and styrene/maleic anhydride copolymers.
The combination of materials applied to the ink-receiving surface 4 may also include an insoluble absorbent substance. This may for example be an organic substance, such as a non-dissolving starched-based material, or aninorganic substance, examples ofwhichmay include clays, calcium carbonate, talc and silica.
A preferred formulation consists of the following combination of materials, by weight: Magnesium sulphate 5-10% Polyvinylpyrrolidone 10-15% Styrene/acrylic esters copolymer 1-5% Starch ether 1-5% This formulation is preferably applied to the ink-receiving surface of the tracing paper at a density of between 1.0 and 5.0 g/m2, preferably approximately 2.0 g/m2.
The formulation may be applied to the natural tracing paper as an aqueous solution, for example by drawing the semi-manufactured paper through a bath of the solution.

Claims (21)

  1. CLAIMS 1. A label sheet assembly including a backing sheet, a label layer of natural tracing paper that has an ink-receiving surface and a non ink-receiving surface, and an adhesive layer provided on the non ink-receiving surface of the label layer that mounts the label layer on the backing sheet, wherein at least the ink-receiving surface of the label layer includes a combination of a water-soluble cationic substance and a water-soluble binder substance.
  2. 2. A label sheet assembly according to claim 1, wherein the cationic substance is a water-soluble polyvalent metal salt.
  3. 3. A label sheet assembly according to claim 2, wherein the metal salt is a salt of a cation from a group consisting of Al3+, Ca'-+, Mg'-+, Zn-'+ and Zr4+.
  4. 4. A label sheet assembly according to claim 3, wherein the cationic substance is selected from a group consisting of aluminium sulphate, calcium chloride, magnesium acetate, magnesium sulphate, zinc acetate and ammonium zirconium carbonate.
  5. 5. A label sheet assembly according to claim 1, wherein the cationic substance is a water-soluble organic polymer.
  6. 6. A label sheet assembly according to claim 5, wherein the cationic substance is selected from a group consisting of quaternary amine and poly-quaternary amine.
  7. 7. A label sheet assembly according to any one of the preceding claims, wherein the binder substance is selected from a group consisting of polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVOH).
  8. 8. A label sheet assembly according to any one of the preceding claims, wherein the ink-receiving surface of the label layer includes an aqueous preparation of a polymeric substance.
  9. 9. A label sheet assembly according to claim 8, wherein the polymeric substance includes a paper sizing substance.
  10. 10. A label sheet assembly according to claim 9, wherein the polymeric substance is selected from a group consisting of styrene/acrylic ester copolymers and styrene/maleic anhydride copolymers.
  11. 11. A label sheet assembly according to any one of the preceding claims, wherein the ink-receiving surface of the label layer includes an insoluble absorbent substance.
  12. 12. A label sheet assembly according to claim 11, wherein the insoluble absorbent substance includes an organic substance.
  13. 13. A label sheet assembly according to claim 12, wherein the insoluble absorbent substance includes a non-dissolving starched-based material.
  14. 14. A label sheet assembly according to claim 11, wherein the insoluble absorbent substance includes an inorganic substance.
  15. 15. A label sheet assembly according to claim 14, wherein the insoluble absorbent substance is selected from a group consisting of clays, calcium carbonate, talc and silica.
  16. 16. A label sheet assembly according to any one of the preceding claims, wherein the ink-receiving surface of the label layer includes a combination of substances including by weight magnesium sulphate 5-10%, polyvinylpyrrolidone 10-15%, styrene/acrylic esters copolymer 1-5%, and starch ether 1-5%.
  17. 17. A label sheet assembly according to claim 16, wherein the combination of substances is applied to the ink-receiving surface of the label layer at a density of approximately 2.0 g/m2.
  18. 18. A label sheet assembly according to any one of the preceding claims, wherein the label layer is divided into a plurality of labels by a number of die cuts that extend through the label layer and the adhesive layer.
  19. 19. A label sheet assembly according to any one of the preceding claims, wherein the backing sheet is provided with a release coating.
  20. 20. A label sheet assembly according to any one of the preceding claims, wherein the adhesive layer comprises a layer of a pressure-sensitive adhesive.
  21. 21. A label sheet assembly substantially as described herein with reference to and as illustrated by the accompanying drawings.
GB9909450A 1999-04-24 1999-04-24 Label sheet assembly Withdrawn GB2349134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9909450A GB2349134A (en) 1999-04-24 1999-04-24 Label sheet assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9909450A GB2349134A (en) 1999-04-24 1999-04-24 Label sheet assembly

Publications (2)

Publication Number Publication Date
GB9909450D0 GB9909450D0 (en) 1999-06-23
GB2349134A true GB2349134A (en) 2000-10-25

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GB9909450A Withdrawn GB2349134A (en) 1999-04-24 1999-04-24 Label sheet assembly

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301845A (en) * 1995-06-06 1996-12-18 Rexam Coated Products Limited A recording sheet
EP0713379B1 (en) * 1993-08-05 1998-06-10 Avery Dennison Corporation Transparent paper label sheets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0713379B1 (en) * 1993-08-05 1998-06-10 Avery Dennison Corporation Transparent paper label sheets
GB2301845A (en) * 1995-06-06 1996-12-18 Rexam Coated Products Limited A recording sheet

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Publication number Publication date
GB9909450D0 (en) 1999-06-23

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