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
  • B41M5/1246—Application of the layer, e.g. by printing
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/20—Macromolecular organic compounds
  • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
  • D21H17/24—Polysaccharides
  • D21H17/28—Starch
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/20—Macromolecular organic compounds
  • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
  • D21H17/24—Polysaccharides
  • D21H17/30—Alginic acid or alginates
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H19/00—Coated paper; Coating material
  • D21H19/10—Coatings without pigments
  • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
  • D21H21/52—Additives of definite length or shape
  • D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
• • 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
  • Y10S428/914—Transfer or decalcomania
• • 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
  • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
  • Y10T428/254—Polymeric or resinous material
• • 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
  • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
  • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
  • Y10T428/277—Cellulosic substrate

Definitions

• the amount of transferable coating e.g. in record materials, needed per unit area can be reduced.
• This advantage can be achieved with small amounts of alginate, e.g. less than 0.05 gram per square meter per side, and high starch to alginate weight ratios e.g. 85: l.
• SIZED TRANSFER SHEET The invention relates to treated paper and like fibrous sheet material and the treatment may take the form of sizing.
• the present invention provides a porous fibrous sheet material one or both surfaces of which have a coating comprising insolubilised alginate and starch, the weight ratio of starch to alginate being from 12:1 to 240:1 and to one or both coated surfaces of which sheet material there is adhered a layer of microscopic, pressure-rupturable capsules containing a transferable material.
• the amount of alginate in both layers can be 0.5, 1.02 or 3.0 grams per square meter although a preferred amount is not more than 0.05 gram per square meter. Smaller amounts of alginate may be employed, for example 0.025 grams per square meter may be used, and amounts down to 0.005 grams per square meter may be used with some advantage. In general it is usually found to be convenient to use about 0.0125 grams per square meter.
• a weight ratio of starch to alginate of from about 12:1 to about 240:1, preferably from 16:1 or 25:1 to 160:1, more preferably about 75:1 to about 85:1 e.g. about 80:1.
• the invention has particular usefulness with respect to paper, other like porous fibrous sheet materials comprising woven or nonwoven fibers may be treated similarly, for example, cardboard or even woven or nonwoven fabrics.
• the alginate present in the treated material according to the invention must be insolubilized and this may be achieved by converting a soluble salt into the free acid, alginic acid, or by one of the well known insolubilizing techniques which involve the reaction of the alginate with a polyvalent metal ion such as that of aluminum.
• the fibrous sheet material according to this invention is preferably obtained by applying to the material an aqueous composition containing starch and a water soluble alginate.
• the starch in the aqueous composition may comprise from 6 to 12 percent by weight and preferably about 8 percent by weight.
• each side of the material treated will usually pick up about 1.5 to 3 percent and desirably about 2 percent, the percentage being by weight based on the dry weight of the material treated.
• the aqueous composition may also contain from 0.05 to 0.5 percent by weight of water soluble alginate and generally about 0.1 percent is preferred.
• alginate will normally be employed as the sodium salt
• any soluble salt can be used, for example, the salts of other alkali metals, magnesium, ammonium and secondary amines.
• the two materials can be incorporated separately and in a variety of ways.
• the required starch may be incorporated into paper during normal paper making techniques prior to laying the beaten fibers on a wire surface through which the water drains.
• an aqueous solution of an alginate salt may be applied to paper immediately the fibers of such material have settled into their configuration on a paper making machine during or after the draining off of the water but before the fibers are compacted.
• a starch composition may be applied first and an alginate solution applied onto the layer of starch. Where the starch and alginate are added separately, however, it is preferred to apply the alginate first and then the starch.
• the insolubilization of the alginate material may be achieved by the alginate reacting with aluminum ions present in a paper, for example, by virtue of the use of alum in the paper making operation.
• an insolubilization treatment may be effected by direct application of an aqueous solution of a salt of a polyvalent ion such as aluminum.
• Fibrous sheet material such as paper treated in accordance with the invention has a surface which is smoother and of reduced porosity compared with the untreated material.
• record materials for example, record materials of the type described in British Pat. Specification No. 759,800.
• This specification in particular describes and claims a record member having provided, on a surface thereof, a coating comprising a plurality of microscopic, pressure-rupturable, oilcontaining capsules of gelled hydrophilic colloid material formed by coacervation and wherein the oil contains a substance capable of producing a distinctive coloration when the capsules are ruptured.
• the microscopic pressure rupturable capsules may be made according to the techniques disclosed in British Pat. Specification Nos. 751,600 and 870,476.
• the internal phase of the capsules that is the oil-containing composition
• a colorless print-marking substance which forms blue marks when it comes into contact with a suitable receptor surface, for example, one containing an acidic material such as attapulgus clay.
• a suitable receptor surface for example, one containing an acidic material such as attapulgus clay.
• the substance capable of producing the distinctive coloration is, of course, kept away from the receptor surface by the capsule walls.
• the oil composition and the receptor surface come into contact and the appropriate mark is made on the receptor surface, for example, by the reaction of a leuco dye to give a blue-colored print.
• the surface which bears the coating of the microscopic capsules is normally sized with starch prior to the provision of the layer of the microscopic capsules. It is believed, however, that with such starch sized papers the surface configuration is such as to provide shielding of capsules by fibers with the effect of loss of capsules into large surface holes which are larger than the average size of such capsules i.e. about 10 to 12 microns.
• the invention includes a record material comprising a porous fibrous sheet material in accordance with the invention to one or both surfaces of which there is adhered a layer of microscopic, pressure-rupturable capsules containing a transferable material comprising a color transfer agent such as an oil which contains a substance capable of producing a distinctive coloration when the capsules are ruptured.
• the color transfer agent may be colored or a substance which develops a color either by exposure to air or when it is in contact with a reagent present in the receptor surface such as one of the acidic materials described in British Pat. Specification No. 759,800.
• the record material of this invention may be formed from a paper base both sides of which have been treated by the application of an aqueous composition comprising both starch and an alginate.
• the capsules can contain transferable materials other than a color transfer agent, for example, solids or liquids including shoe polish, perfume and adhesives.
• a color transfer agent which could be employed which is other than the type described in Specification No. 759,800 is a colored ink which may be constituted by a relatively low boiling organic solvent such as toluene and a colored dye or a leuco dye dissolved in the solvent.
• the invention includes a porous fibrous sheet material in accordance with the invention to one or both surfaces of which there is adhered a layer of microscopic, pressure rupturable capsules containing a transferable material such as a color transfer agent or one of the other transferable materials mentioned above.
• CB Sheet i.e. a record material having a coated back, the coating consisting of the said capsules containing a color transfer agent and a so-called CF Sheet" which has a coated front, the coating of which normally contains an acidic material.
• CB Sheet and a CF Sheet there may be interposed one or more so-called CFB Sheets" which are coated on the front with an acid material and coated on the back with microscopic capsules.
• the invention also includes manifold sets including a record material as defined above as a "CB Sheet or a CFB Sheet.
• EXAMPLE White 49 g.s.m. base paper was treated at the size press with a size consisting of an 8 percent solution of a preoxidized corn starch, Amisol E. 1102 [Amisol is a Registered Trade Mark and Manutex SX/RF (supplied by Alginate Industries Limited).
• the size was prepared by making up the alginate as a 6 percent solution using Calgon (sodium metaphosphate) as a dispersant in the ratio 2:1 Alginate to Calgon (weight/weight as delivered). The Calgon was first added to the water and then the alginate was stirred in with a high speed stirrer. The alginate was then blended with the starch mix at 50/60 C. to give an 85:1 starch to alginate blend as an 8 percent solution.
• Calgon sodium metaphosphate
• Each CB (emulsion coated back) sheet was placed against a standard CF (clay coated front) strip and the two run through a calender roll nip at standard speed.
• the nip width was 0.75
• the emulsion containing microscopic capsules referred to above consisted of the following ingredients:
• a porous fibrous sheet material one or both surfaces of which have a sizing coating comprising insolubilized alginate and starch, the weight ratio of starch to alginate being from 12:1 to 240:1, and to one or both coating surfaces of which sheet material there is adhered a layer of microscopic, pressure-rupturable capsules containing a transferable coloring material.
• a sheet material as claimed in claim 1 wherein the transferable material comprises a color transfer agent which contains a substance capable of producing a distinctive coloration when the capsules are ruptured.
• a paper sheet as claimed in claim 1 coated with about 0.0125 grams per square meter per side of aluminum alginate and about 1 gram per square meter per side of preoxidized corn starch.

Landscapes

• Color Printing (AREA)
• Paper (AREA)
• Coloring (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Laminated Bodies (AREA)
• Decoration Of Textiles (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10257278

Family Applications (1)

Country Status (13)

Cited By (9)

Families Citing this family (1)

Citations (7)

• 1968
  • 1968-06-07 GB GB27296/68A patent/GB1274667A/en not_active Expired
• 1969
  • 1969-06-03 NO NO2298/69A patent/NO124469B/no unknown
  • 1969-06-05 SE SE07973/69A patent/SE363367B/xx unknown
  • 1969-06-05 FR FR6918490A patent/FR2010349A1/fr not_active Withdrawn
  • 1969-06-06 DE DE19691928668 patent/DE1928668A1/de active Pending
  • 1969-06-06 BE BE734234D patent/BE734234A/xx unknown
  • 1969-06-06 DK DK305969AA patent/DK127515B/da unknown
  • 1969-06-06 US US831236A patent/US3620801A/en not_active Expired - Lifetime
  • 1969-06-06 CH CH866969A patent/CH501772A/de not_active IP Right Cessation
  • 1969-06-06 NL NL6908616A patent/NL6908616A/xx unknown
  • 1969-06-06 BR BR209542/69A patent/BR6909542D0/pt unknown
  • 1969-06-06 AT AT05396/69A patent/AT304253B/de not_active IP Right Cessation
  • 1969-06-06 ES ES368083A patent/ES368083A1/es not_active Expired

Patent Citations (7)

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