EP0304206B1 - Self-contained pressure-sensitive carbonless recording sheet having anti-scuff protective overcoating - Google Patents

Self-contained pressure-sensitive carbonless recording sheet having anti-scuff protective overcoating Download PDF

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Publication number
EP0304206B1
EP0304206B1 EP88307295A EP88307295A EP0304206B1 EP 0304206 B1 EP0304206 B1 EP 0304206B1 EP 88307295 A EP88307295 A EP 88307295A EP 88307295 A EP88307295 A EP 88307295A EP 0304206 B1 EP0304206 B1 EP 0304206B1
Authority
EP
European Patent Office
Prior art keywords
pressure
sensitive
coating
overcoating
self
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.)
Expired - Lifetime
Application number
EP88307295A
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German (de)
English (en)
French (fr)
Other versions
EP0304206A2 (en
EP0304206A3 (en
Inventor
William D. Swiercz
Robert W. Brunea
George E. Maalouf
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.)
Moore Business Forms Inc
Original Assignee
Moore Business Forms Inc
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Filing date
Publication date
Application filed by Moore Business Forms Inc filed Critical Moore Business Forms Inc
Publication of EP0304206A2 publication Critical patent/EP0304206A2/en
Publication of EP0304206A3 publication Critical patent/EP0304206A3/en
Application granted granted Critical
Publication of EP0304206B1 publication Critical patent/EP0304206B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/132—Chemical colour-forming components; Additives or binders therefor

Definitions

  • the present invention relates to providing a self-contained pressure sensitive carbonless recording sheet with a protective coating for improving the scuff-resistance and other handling qualities of the product.
  • Pressure-sensitive carbon less recording sheets are generally available in several different types, in particular they are commercially available in two specific types, complementary and self-contained.
  • complementary types of recording sheet are described in Specifications US No. 2299693 and Japanese A-62121086 and a self-contained recording sheet is described in European Specification No. EP-A-171795.
  • a first kind of coating is applied on the back of a sheet which will be used as an overlying sheet, and a second kind of coating is applied to a sheet which will be used as an underlying sheet. In use, these sheets are placed in an overlying/underlying relation.
  • the overlying sheet is written-upon or printed-upon using pressure, for instance by means of a ballpoint pen or impact-type of printer, some material in the coating on the back of the over lying sheet is transferred onto (or into) the coating on the front of the underlying sheet, causing a chemical and/or physical reaction at the situs of and in the pattern of the applied pressure, resulting in a visible mark being produced on the front of the underlying sheet in correspondance with the situs and pattern of pressure applied to the front of the overlying sheet.
  • the CB coating slurry comprises microencapsulated colour-former solution dispersed in an emulsifier/binder medium
  • the CF coating slurry comprises a colour developer, such as zinc-modified novolac polymer particles dispersed in a binder medium.
  • the resultant sheet When this blend is coated onto a paper substrate, the resultant sheet will produce a visible mark in the area where the impact is applied to the sheet with no transfer of materials required.
  • This has great utility in imaging systems where impact alone is used to impart information on the sheet without the benefit of transfer of any materials such as ink, carbon, toner, colour former or such.
  • Such a system generally requires a high degree of sensitivity to imaging pressure.
  • the sheet since the sheet is always active, it is prone to premature imaging caused by normal handling operations such as printing, winding, collating, filing, copying, the imaging process itself, distribution, collection, and scanning.
  • a further pressure-sensitive recording sheet as described in British Specification No. 967390 comprises pressure-sensitive recording material comprising a coloured base sheet with a coating composition which is normally opaque but which becomes transparent when sufficient pressure is applied to it for example by writing implement or a typewriter type face. However because in certain circumstances the coating composition became offset from the base sheet an overcoating was supplied.
  • US Specification No. 2949381 describes a sheet having a coating including a waxy substance including a colour former and also having an overlying protective layer. This sheet is suitable for use in a spirit duplicating process.
  • US Specification No. 4098114 describes a recording sheet for measuring pressures containing a colour former and a colour developer and a protective layer of a transparent synthetic resin.
  • a protective overcoat is provided for a self-contained pressure-sensitive carbonless recording sheet.
  • the sheet is initially coated with a blend of a microencapsulated colour former and a colour developer in a binder medium.
  • the purpose of the overcoat is to prevent premature colour formation through accidental rupture of the microcapsules and reaction of the colour former and colour developer.
  • the overcoat comprises a film forming material dissolved, dispersed or otherwise distributed in an essentially aqueous medium. These materials can be prepared in an aqueous medium from the dry state prior to use or supplied in a pre-dissolved or dispersed state by a manufacturer.
  • the majority of microcapsule shells are composed of materials which are permeable to organic solvents, particularly polar ones, to various degrees and allow removal of the core material. If an amount of core material is extracted by application of an organic solvent, premature colour formation will occur when the core colour former contacts the colour developing material.
  • Suitable materials which have been found include synthetic latexes, polyvinylalcohols (PVA) and polyvinylalcohol-acetate copolymers (PVAc), cellulose gums and ethers, acrylic resins, polyethylene oxide ethers, polyvinylpyrrolidone (PVP) and copolymers of styrene, ethylene and methylvinylether with maleic anhydride.
  • PVA polyvinylalcohols
  • PVAc polyvinylalcohol-acetate copolymers
  • acrylic resins polyethylene oxide ethers
  • PVP polyvinylpyrrolidone
  • copolymers of styrene ethylene and methylvinylether with maleic anhydride.
  • Other materials conventionally used for binding, film forming may also be suitable for use and can easily be identified by the methods shown in this application.
  • FIG. 1 is an enlarged fragmentary cross-sectional view of a sheet of paper, coated with a scuff-protected self-contained pressure-sensitive carbonless recording material provided in accordance with the principles of the present invention, this sheet being covered with an overlying sheet which is shown as it is about to be impacted by an impact printer member for causing a visible mark to be intentionally made on the underlying sheet.
  • a self-contained carbonless coating composition comprised of a blend of microcapsules containing color former solution designed to provide a black image, zinc modified novolac phenol polymer particles, filler pigments and binders are coated on the front surface of a white bond paper such as Boise Summit Bond, with a basis weight of 45 g/m2 (12 lbs per 500 sheets, 17 x 22 inches), by means of a wire wound rod to achieve a dry coating weight in the range of 5.0 to 10.0 grams/m2, or approximately 1.33 to 2.66 pounds/17 x 22 in. per 500 sheets.
  • a white bond paper such as Boise Summit Bond
  • this stock of conventional SC product was divided into nine lots.
  • the first lot was left plain (non-overcoated) for comparison, and the other eight lots were overcoated with eight different notionally-potential overcoating compositions in the research laboratory by flowing a solution of the respective composition onto a respective SC-coated sheet, and using a smooth rod to spread the coating to a generally uniform level of thickness.
  • the coated sheets and control sheets were then subjected to drying in an oven at a temperature of 110 degrees Centigrade for a period of one minute, removed, permited to regain ambient temperature and humidity and then weighed, and tested for scuff resistance as reported below in connection with the results tabulated in table I.
  • the amount recorded is the weight of over-coating, subsequent to drying, given as a value of pounds per 500 sheets of 17 x 22 inch paper. These values divided by 0.266 give the corresponding values in g/m2.
  • Dow 620 is a styrene-butadiene rubber
  • Vinol 325 is polyvinyl alcohol
  • Techniflex 5200 is an acrylic overprint varnish
  • EMA 1103 is ethylene-maleic anhydride
  • Scriptset 540 is styrene-maleic anhydride
  • Future is an acrylic floor coating sold in grocery stores for household use
  • Rhoplex B-15 is a cationic latex
  • Joncryl 678 is an acrylic resin, which was dissolved in ethanol/methyl carbitol, rather than being applied as an aqueous emulsion as were lots 2-8.
  • the IMAGE column in Table I tabulates the results of such testing in terms of a darkness of intentionally-created image in comparison to background. As is conventional for such testing, results are tabulated both from immediate (IMM.) readings, and ones made 20 minutes after impact printing. The testing was conducted using a Bausch & Lomb opacimeter further described below.
  • Scuff resistance was measured by scuffing the coated side of each sheet using a Scott C-fold paper towel No. 150, under a pressure of 20.7-27.6 kPa (3-4 psi), with scuffing being performed both with and crosswise of the coating application direction.
  • the two numbers separated by the slash indicates the direction of the scuff.
  • the first number, before the slash, in the scuff column is the reading for scuffs with the web
  • the second number, after the slash is for scuffs across the web.
  • the numbers in the SCUFF column are separated by a slash, e.g. the first entry is 67.3/71.4.
  • the opacimeter reads reflectance, and the opacimeter is calibrated by setting the reflectance of the substrate at 100.
  • the substrate is usually white paper.
  • the first reading of 67.3/71.4 indicates poor reflectance (color resulting from broken capsules representing a mark absorbed some of the light).
  • the second reading of 96.7/96.2 indicates good reflectance (very little color from broken capsules), i.e. just a few points below the white substrate reading of 100. No scuff value was generated for lots 8 and 9 due to poor imaging intensity results.
  • paper having a self-contained pressure-sensitive carbonless recording coating can be improved by having that coating overcoated using an aqueous-based film-forming material so as to dramatically improve scuff resistance, without significantly deteriorating the image-providing capability in comparison with the non-overcoated control (Lot 1).
  • the application of an overcoat film-forming material dissolved in a non-aqueous solvent was seen to have a significant detrimental effect, as did the cationic latex overcoat.
  • Aqueous based overcoats can be applied during the coating phase of manufacture of the conventional self-contained pressure-sensitive carbonless recording sheet product by a coating fountain of various available types, or during the finishing phase by a flexo print deck on the printing press or collator. This produces a self-contained sheet with the advantages of high imaging sensitivity and extended form life during use.
  • Overcoats also offer the opportunity to include additives for better performance which may not be as useful or compatible with the blended self-contained system itself.
  • a U.V. absorber can be include in the overcoat to give resistance to U.V. exposure.
  • a surface-modifying agent may be included to give an overcoat with a more receptive surface for printing or scanning, or to produce a glossy or matte finish.
  • Suitable aqueous-based film-forming material found for use as the overcoat of the present invention include emulsions, dispersions or solutions of synthetic latexes, polyvinylalcohols and polyvinylalcohol-acetate copolymers, cellulose gums and ethers, acrylic resins, polyethylene oxide ethers, polyvinylpyrrolidone, copolymers of styrene, ethylene and methylvinylether with maleic anhydride, and other materials variously conventionally used for binding, film-forming and the like.
  • Self-contained carbonless coatings with protective overcoating could be used in many products and applications where improved scuff resistance and reduced discoloration are required. These overcoats provide improved protection of the image against weather and abrasion. Enhanced security aspects, indelibility, and alteration resistance of the image is obtained with these overcoatings.
  • overcoatings Some examples of products which may benefit from overcoatings are business forms, airline tickets, lottery tickets, shipping labels, and other similar items. Generally, any document having carbonless microcapsules, or more particularly, self-contained carbonless coatings will be improved by an overcoat according to the present invention.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Color Printing (AREA)
EP88307295A 1987-08-21 1988-08-08 Self-contained pressure-sensitive carbonless recording sheet having anti-scuff protective overcoating Expired - Lifetime EP0304206B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8779687A 1987-08-21 1987-08-21
US87796 1998-06-01

Publications (3)

Publication Number Publication Date
EP0304206A2 EP0304206A2 (en) 1989-02-22
EP0304206A3 EP0304206A3 (en) 1990-11-07
EP0304206B1 true EP0304206B1 (en) 1994-06-29

Family

ID=22207313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307295A Expired - Lifetime EP0304206B1 (en) 1987-08-21 1988-08-08 Self-contained pressure-sensitive carbonless recording sheet having anti-scuff protective overcoating

Country Status (12)

Country Link
EP (1) EP0304206B1 (fi)
JP (1) JPS6469383A (fi)
AU (1) AU603478B2 (fi)
BR (1) BR8804262A (fi)
CA (1) CA1309251C (fi)
DE (1) DE3850461T2 (fi)
DK (1) DK466788A (fi)
FI (1) FI883858A (fi)
MX (1) MX168992B (fi)
NO (1) NO883701L (fi)
NZ (1) NZ225858A (fi)
PT (1) PT88279A (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112007314B (zh) * 2020-09-02 2021-11-16 湖南大汉无忧智慧科技有限公司 一种基于物联网的消防系统自检系统及其使用方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2299693A (en) * 1940-02-23 1942-10-20 Ncr Co Coating for paper
US2949381A (en) * 1958-04-04 1960-08-16 Steinhardt Amos Duplicating sheet coated with a colorless waxy transfer material
GB967390A (en) * 1961-11-29 1964-08-19 Caribonum Ltd Improvements in or relating to pressure-sensitive recording material
ES395128A1 (es) * 1970-09-16 1975-03-16 Fuji Photo Film Co Ltd Mejoras en la obtencion de papel registrador sensible a la presion.
GB1370081A (en) * 1972-01-31 1974-10-09 Wiggins Teape Research Dev Ltd Capsule-carrying sheets or webs
JPS52118318A (en) * 1976-03-26 1977-10-04 Fuji Photo Film Co Ltd Record sheets
JPS5449210A (en) * 1977-09-24 1979-04-18 Mitsubishi Paper Mills Ltd Pressureesensitive simple recording paper
JPS6149887A (ja) * 1984-08-16 1986-03-11 Kanzaki Paper Mfg Co Ltd 単体感圧記録シ−ト
JPS62121086A (ja) * 1985-11-22 1987-06-02 Fuji Photo Film Co Ltd 感圧複写用マイクロカプセルシ−ト

Also Published As

Publication number Publication date
NZ225858A (en) 1990-06-26
EP0304206A2 (en) 1989-02-22
DE3850461D1 (de) 1994-08-04
NO883701D0 (no) 1988-08-18
BR8804262A (pt) 1989-03-21
MX168992B (es) 1993-06-16
FI883858A0 (fi) 1988-08-19
EP0304206A3 (en) 1990-11-07
NO883701L (no) 1989-02-22
DK466788A (da) 1989-02-22
PT88279A (pt) 1989-06-30
JPS6469383A (en) 1989-03-15
FI883858A (fi) 1989-02-22
AU603478B2 (en) 1990-11-15
CA1309251C (en) 1992-10-27
DE3850461T2 (de) 1995-01-26
DK466788D0 (da) 1988-08-19
AU2111588A (en) 1989-02-23

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