US3020172A - Process of manufacture of temperaturesensitive recording paper - Google Patents

Process of manufacture of temperaturesensitive recording paper Download PDF

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US3020172A
US3020172A US83840159A US3020172A US 3020172 A US3020172 A US 3020172A US 83840159 A US83840159 A US 83840159A US 3020172 A US3020172 A US 3020172A
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polymerized
paper base
layer
liquid
organic
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Mohnhaupt Dietrich Frit Arthur
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Permaco SA
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Permaco SA
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    • 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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/36—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its' properties, e.g. of its' optical hydrophobic-hydrophilic, solubility or permeability properties
    • 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
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
    • 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
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood

Definitions

  • a second method of producing the whitening is based on the formation of very many very small hollow spaces in the interior of the layer during the evaporation of the solvent. These hollow spaces are only formed when the solvent is evaporated sufiiciently rapidly before the solid constituents of the layer become coagulated. For this reason only very dilute solvents with a solid content up to approximately 6 percent by weight can be used, because.
  • the solid highly polymerized constituents of the layer possess the property of tenaciously retaining the solvent.
  • the layer does not otter any appreciable resistance tothe current of air. On continued drying the layer can break at the troughs of the'waves, or in any casethethickness of the layer is not uniform.
  • the present. invention obviates these disadvantages and I is inert towards paper and in which the above-mentioned substance is insoluble, the higher boiling liquid being added in an amount such that the highly polymerized substance is not precipitated andfthe total mixture (C-l-A/B) has a'solid content of 6 to 20 percent by weight.
  • a dark carrying paper P is then coated (step I in the accompanyingfiowsheet) with a layer of this mixture and first the low boiling solvent (B; step II)
  • the process for 3,020,172 "Patented Feb. 6, 1962 2 and after this the higher boiling liquid (C; step 111) is evaporated.
  • the highly, polymerized organic substance which forms the coating layer is dissolved in a low boiling point solvent, for example, acetone, methylacetate, tetrahydrofuran, dimethylacetal, or methylenechloride.
  • a low boiling point solvent for example, acetone, methylacetate, tetrahydrofuran, dimethylacetal, or methylenechloride.
  • the solvent is mainly evaporated, so that the substance which forms the coating layer is precipitated' as a finely divided light-colored precipitate in the organic liquid.
  • the substance which forms the coating layer combines intimately with the surface of the carrying paper, an extremely good adherence being obtained.
  • the whitening of the layer depends therefore on the precipitation of very small particles of solid deposited at random in an indifferent liquid.
  • the time of evaporation of the solvent should be between l.8 and 24, preferably 2, that of the organic liquid, should be between 2.8 and 4, preferably 3,as compared withthat of diethylether which is taken to be equal to l.
  • the indilierent organic liquid should have no chemical atiinity for the constituents of the carrying paper because experiments have shown that otherwise distortion and shrinking of the carrying paper occur, whereby the adherence of the temperature-sensitive layer considerably decreases.
  • Substances which can be used with advantage are aliphatic hydrocarbons, for example, cyclohexane, hexane, heptane, benzine and the like.
  • substances which form the coating layer all highly polymerized organic substances are suitable, provided they are soluble in the above-mentioned solvents and insoluble in the above-mentioned liquids and possess a satisfactory white shade or color and have, either in the pure form or in mixtures, a melting or sintering point which is between C. and 220 C.
  • Suitable substances are for example cellulose esters, cellulose ethers, polystyrene, polyvinylacetate, ketone resins, derivatives'of colophony, phenol-formaldehyde resins, polyvinylchloride, polyvinylidenechloride, polymethacrylate, resins, etc.
  • the concentration of the layer forming substance in the present process amounts to 6'to 20% and is preferably 10%, the solution has a viscosity which is comparablewith that of glycerine. Owing to this, the formation of waves and cracks on drying with air is prevented-and a layer of uniform thickness is formed.
  • a mixture of high polymerizedsubstances may be used as the substance which forms the coating layer.
  • a suitable melting point for the mixture which is adapted tosuit the requirements of the recording apparatus, can be obtained.
  • low melting point waxes or resins and softeners the melting point of the layer can be adjusted as desired.
  • the whitening of the layer can be accelerated by removing the solvent by meansof a current of air at a temperature of about 35 C. instead of with a current of cold air.
  • the higher boiling organic liquid can be evaporated by a current of hot air, the temperature of which is below the melting temperature of the solid constituents forming the coating layer. Therefore a current of air at a temperature of 20 to 40 C., pref erably 35 C., is first directed on to the layer until this appears white and after this a current of air at a temperature of 40 to 100 C., preferably 75 C., is directed on the layer until the higher boiling liquid is completely evaporated.
  • An advantageous process in accordance with the invention is, for example, to use polyisobutylene as the highly polymerized substance and pentane, hexane or benzine as the lower boiling solvent, and ethylacetate or methylethylketone as the higher boiling organic liquid.
  • the first precaution enables the thickness of the temperature-sensitive layer to be reduced without detracting from the degree of whiteness.
  • an optical brightener which has the property of causing a grey surface to appear white.
  • a temperature-sensitive layer made by the process described cannot be made thinner than 15' to 1 Without the dark background appearing through it.
  • the thickness of the layer can be reduced to 5 1 while maintaining the necessary degree of whiteness. with a layer having a thickness of a is reduced by about three times.
  • Optical brighteners are known in the textile industry. They are frequently used in order to cause textiles which have frequently been washed and have a grey appearance to appear white again.
  • derivatives of benzthiazole, stilbene and triazine see British Patent No. 683,895, Swiss Patent No. 275,140 and Belgian Patent No. 540,323 which are known in commerce under the registered trademark Blankophor of Wegriken B. yer A.G., and are used as optical brighteners.
  • the second additional precaution is based on the idea of producing the heat necessary for making the layer transparent by exothermic chemical reaction in the layer itself, the stylus requiring only to be heated to the reaction temperature at the place of contact.
  • Suitable reactions which evolve the necessary heat are oxidation and neutralization processes.
  • the nearest part of the layer melts, which part contains in addition to the highly polymerized organic substance, the peroxy acid (or an inorganic peroxy acid) and a reducing amine R'NH (or a suitable inorganic compound) and in The time of response as compared "3 some cases also an optical brightener.
  • the reactions which then take place are substantially as follows:
  • the time of response of the layer can be considerably varied.
  • concentrations however, must not be so high that spontaneous reactions occur.
  • Example 1 16.5 g. of celluloseaceto-butyrate and 0.8 g. of phthalic acid dicyclohexylester are dissolved in 120 g. of acetone. 80 g. of cyclohexane are then added with stirring. This mixture is applied in a thickness of 0.05 mm. to a black carrying paper by means of rollers, and is blown for 10 seconds with air at a temperature of 35 C. and then for 10 seconds with air at C. The layer obtained responds at a temperature of about 120 C.
  • Example 2 11 g. of celluloseaceto-butyrate and 11 g. of ethyl cellulose are dissolved in 100 g. of tetrahydro furan and then 100 g. of benzine having a. boiling range of to C. are added while stirring. The further treatment is the same as in Example 1. The white layer obtained responds at a temperature of approximately C.
  • Example 3 20 g. of polystyrene and 2.2 g. of a ketone res-in (made from cyclohexanone and methylcyclohexanone) are dissolved in 120 g. of methylacetate. Then 80 g. of heptane are added while stirring. The application and drying of the coating takes place as in Example 1. The layer obtained responds at a temperature of about 100 C.
  • Example 4 22 g. of polyisobutylene (molecular weight about 200,000) are dissolved in 110 g. of hexane. 90 g. of ethylacetate are then added with stirring. The further treatment takes place as in Example 1. The layer obtained responds at a temperature of about C.
  • Example 5 5
  • Example 6 14 g. of celluloseaceto-butyrate, 0.7 g. of phthalic aciddicyclohexylester, 1.6 g. of nionoperoxyphthalic acid and 1 g. of meta-aminophenol are dissolved in 120 g. of acetone. Then 80 g. of 'cyclohexane are added with stirring. The further treatment is the same as in Example 1.
  • the layer obtained has a time of response of only 0.25 milliseconds on contact with a stylus heated to 220 C.
  • Example 7 2.6 mg. of. an optical brightener (Blankophor) are added to the solution obtained in Example 6.
  • the layer is applied in the same way as in Example 1 and base. thickness of about 5 to 8p.
  • the time or response is from 0.1 to 0.18 millisecond.
  • Example 8 18 g. of polystyrene, 2 g. of a ketone resin (made from cyclohexanone and methylcyclohexanone), 0.65 g. of dibenzoylperoxide and 1.5g. of N-dimethyl-meta-aminophenol are dissolved in 120 g. of methylacetate. After addition of 80 g. of heptane the layer is applied to black paper as in Example 1.
  • Example 9 1.5 mg. of optical brightener (Blankophor) are added to the mixture described in Example 8 and the mixture is applied to black paper in the manner described in Example 1, the layer having a thickness of to 8a. This has a time of response of 0.1 to 0.15 millisecond on contact with a stylus heated to 220 C.
  • optical brightener Bitophor
  • a process for manufacturing temperature-sensitive recording paper having a light-colored coating layer on a dark carrier paper base comprising admixing with the solution of a polymerized organic substance having a sintering point of from about 80 to 220 C. in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being added in such amounts to said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight; applying said resulting mixture on said paper base; heating the resulting layer of said mixture on said paper base to evaporate substantially exclusively said solvent therefrom, thereby forming a finely divided gray to white precipitate of said polymerized substance in said inert liquid on said paper base; and then heating further to
  • said polymerized organic substance is selected from the group consisting of cellulose esters, cellulose ethers, polystyrene, polyvinylacetate, ketone resins, colophony derivatives, formaldehyde resins, polyvinylidene chloride, polyvinyl chloride, polymethacrylate, coumarone' resins and polyacetone, methylacetate, tetrahydrofuran, dimethylacetal and methylenechloride, and the higher boiling organic liquid is selected from the group consisting of cyclohexane, hexane, heptane and benzine.
  • a process for manufacturing temperature-sensitive recording paper having a light-colored coating layer on a dark carrier paper base comprising admixing with the solution of a polymerized organic substance having a sintering point of from about 80 to 220 C. in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, an organicliquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being added in such amounts to said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight; applying said resulting mixture on said paper base; directing a current of air at a temperature of from about 20 to 40 C.
  • a process for manufacturing temperature-sensitive recording paper having a light-colored coating layer on a dark carrier paper base comprising admixing with the solution of a polymerized organic substance having a sintering point of from about 80 to- 220 C. and an optical brightener in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, an organic liquidfree from hydroxyl groups which has a boiling pointabovc the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being added in such amounts to said solution that said polymerized material is not me cipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight; applying said resulting mixture on said paper base; heating the resulting layer of said mixture on said paper base to evaporate substantially exclusively said solvent therefrom, thereby forming a finely divided gray to White precipitate of said polymerized substance in said iner
  • optical brightener is selected from the group consisting of benzthiazole Optical brighteners, stilbene optical brighteners and triazine optical brighteners.
  • a process for manufacturing temperature-sensitive recording paper having a light-colored coating layer on a dark carrier paper base comprising admixing with the solution of a polymerized organic substance having a sintering point of from about to 220 C. in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, an oxidizing agent selected from the group consisting of acid peroxides and peroxyacids, a reducing amine capable of reacting with said oxidizing agent at temperature above their melting points, with evolution of heat, and an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintexing point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being added in such amounts to said solution.
  • said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight; applying said resulting mixture on said paper base; heating the resulting layer of said mixture on said paper base to evaporate substantially exclusively said solvent therefrom, thereby forming a finely divided gray to white precipitate of said polymerized substance in said inert liquid on said paper base; and then heating further to such temperature as to evaporate said inert liquid therefrom and forming a gray to white coating of said polymerized substance on said paper base.
  • a process for manufacturing temperature-sensitive recording paper having a light-colored coating layer on a dark carrier paper base comprising admixing with the solution of a polymerized organic substance having a sintering point of from about 89 to 220 C., an optical brightener, and an oxidizing agent selected from the group consisting of acid peroxides and peroxyacids, and a re ducing amine capable of reacting with said oxidizing agent at a temperature above their melting points with evolution of heat in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, organic liquid free from bydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being added in such amounts to said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight; applying
  • a coating bath for the manufacture of temperaturesensitive recording paper consisting essentially of a solution of a polymerized organic substance having a sintering point of from about 80 to 220 C. in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, and an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution. that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight.
  • said polymerized organic substance is selected from the 8 group consisting of cellulose esters, cellulose ethcrs, polystyrene, polyvinylacetate, ketone resins, colophony derivatives, formaldehyde resins, polyvinylidene chloride, polyvinyl chloride, polymethacrylate, coumarone resins and polyisobutylene.
  • the low boiling solvent is selected from the group consisting of acetone, methylacetate, tetrahydrofuran, dimethylacetal and methylcnechloride
  • the higher boiling organic liquid is selected from the group consisting of cyclohexane, hexane, heptane and benzine.
  • the low boiling solvent is selected from the group consisting of pentane and hexane
  • the higher boiling organic liquid is selected from the group consisting of ethylacetate and methyl ethyl ketone
  • the polymerized organic substance is polyisobutylene
  • a coating bath for the manufacture of temperaturesensitive recording paper consisting essentially of a solu tion of a polymerized organic substance having a sintering point of from about to 220 C. and an optical brightener in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, and an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by Weight.
  • a coating bath for the manufacture of temperaturescnsitive recording paper consisting essentially of a solution of a polymerized organic substance having a sistering point of from about 80 to 220 C., an oxidizing agent selected from the group consisting of acid peroxides and peroxyacids, and a reducing amine capable of reacting with said oxidizing agent at a temperature above their melting points with evolution of heat in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, and an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by Weight.
  • a coating bath for the manufacture of temperaturesensitive recording paper consisting essentially of a solution of a polymerized organic substance having a sintering point of from about 80 to 220 C., an optical brightener, and an oxidizing agent selected from the group consisting of acid peroxides and peroxyacids, and a reducing amine capable of reacting with said oxidizing agent at a temperature above their melting points with evolution of heat in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, and an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight.
  • a temperature-sensitive recording paper consisting essentially of a dark carrier paper base and a coating thereon of a finely divided gray to white precipitate of a polymerized organic substance having a sintering point of from about 80 to 220 C.; said coating having a thickness of at least about 10 to 15 microns, and being 9 formed from a layer of a mixture of the solution of said polymerized organic substance in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, with an organic liquid tree from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight, in which layer said polymerized substance has first been precipitated by evaporation substantially only of said solvent, and
  • a temperatureeeusitive recording paper consisting essentially of a dark earlier paper base and a coating thereon of a finely divided gray to white precipitate of a polymerized organic substance having a siutering point of from about 80 to 220 C. and being selected from the group consisting of cellulose esters, cellulose ethers, polystyrene, polyvinylacetate, ketone resins, colophony derivatives, formaldehyde resins, polyvinylidene chloride, polyvinyl chloride, polymethacrylate, coumarone resins and polyisobutylene; said coating having a thickness of at least about 10 to 15 microns, and being formed from a layer of a mixture of the solution of said polymerized organic substance in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, with an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which
  • a temperature-sensitive recording paper consisting essentially of a dark carrier paper base and a coating thereon of a finely divided gray towhite precipitate of a polymerized organic substance having a sintering point of from about 80 to 220 C. and an optical brightener; said coating having a thickness of at least about microns, and being formed from a layer of a mixture of the solution of said polymerized organic substance in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, with an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said Organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material in insoluble, said liquid being contained in such amounts in said solution that said polymerized material is not precipitated therefrom, and that the solids content of the resulting mixture is from about 6 to 20% by weight, in which layer said polymerized substance has first been precipitated by evaporation substantially only of said solvent
  • a temperaturesensitive recording paper consisting essentially of a dark carrier paper base and a coating thereon of a finely divided gray to white precipitate of a polymerized organic substance having a sintering point of from about 80 to 220 C., an oxidizing agent selected from the group consisting of acid peroxides and peroxyacids, and a reducing amine capable of reacting with said oxidizing agent at a temperature above their melting points with evolution of heat; said coating having a thickness of at least about 10 to 15 microns, and being formed from a layerof a mixture of the solution of said polymerized organic substance in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, with an organic liquid free from hydroxyl groups which has a boiling point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution that said polymerized material
  • a temperature-sensitive recording paper consisting essentially of a dark carrier paper base and a coating thereon of a finely divided gray to white precipitate of a polymerized organic substance having a sintering point of from about 80 to 220 C., an optical brightener, an oxidizing agent selected from the group consisting of acid peroxides and peroxyacids, and a reducing amine cature above their melting points with.
  • said coating having a thickness of at least about 5 microns, and being formed from a layerof a mixture of the solution of said polymerized organic substance in an organic solvent therefor having a boiling point lower than the sintering point of said polymerized material, with an organic liquid free from hydroxyl groups which has a boil ing point above the boiling point of said organic solvent and below the sintering point of said polymeric material, which is inert'toward said paper base, and in which said polymerized material is insoluble, said liquid being contained in such amounts in said solution that said polymerized material is not precipitated therefrom, and that References Cited in the file of this patent UNITED STATES PATENTS 2,519,660 James jAug. 22, 1950 2,686,676 Rowe et al Aug. 17, 1954 2,739,909 Rosenthal Mar. 27, 1956 2,859,351 Clark et al. Nov. 4, 1958,

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
US83840159 1958-09-16 1959-09-08 Process of manufacture of temperaturesensitive recording paper Expired - Lifetime US3020172A (en)

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Application Number Priority Date Filing Date Title
CH6401058A CH370954A (de) 1958-09-16 1958-09-16 Verfahren zur Herstellung temperaturempfindlicher Registrierpapiere
CH7437459A CH377188A (de) 1958-09-16 1959-06-12 Verfahren zur Herstellung temperaturempfindlicher Registrierpapiere

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CH (3) CH370954A (en, 2012)
DE (1) DE1153612B (en, 2012)
FR (1) FR1242396A (en, 2012)
GB (1) GB868579A (en, 2012)
NL (6) NL99492C (en, 2012)

Cited By (13)

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US3111421A (en) * 1961-04-27 1963-11-19 Columbia Ribbon & Carbon Method for preparing pressure-sensitive duplicating elements
US3145117A (en) * 1959-11-08 1964-08-18 Katchaisky Aharon Process for production of pressure sensitive recording medium
US3167443A (en) * 1961-07-07 1965-01-26 Interchem Corp Pressure sensitive copying sheet
US3180752A (en) * 1961-11-06 1965-04-27 Interchem Corp Heat-sensitive copying sheets
US3306763A (en) * 1961-02-15 1967-02-28 Oxford Paper Co Method of making heat sensitive recording sheet
US3320089A (en) * 1964-03-09 1967-05-16 Judson Bigelow Inc Method of making blush coated recording sheet, coated sheet and coating composition
US3511700A (en) * 1964-10-21 1970-05-12 Litton Business Systems Inc Electro-sensitive marking blank
US3620806A (en) * 1968-05-17 1971-11-16 Westvaco Corp Blushed polystyrene coating on paper
US3869305A (en) * 1971-08-10 1975-03-04 Aluminum Co Of America Method for producing an opaque coating
US3915726A (en) * 1973-11-14 1975-10-28 Ppg Industries Inc Production of void containing polymer films using an emulsified, high boiling non-solvent
US3928260A (en) * 1973-10-29 1975-12-23 Aluminum Co Of America Opaque white coating composition comprising essentially cellulose ester/cross-linking agent/catalyst/solvent and organic liquid
US4296179A (en) * 1974-06-24 1981-10-20 Wardwell Charles R Frangible bonding using blush lacquer
CN117468268A (zh) * 2023-12-27 2024-01-30 湖南大道新材料有限公司 一种阻水纸袋及其制备方法与应用

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2007347A1 (en, 2012) * 1968-03-23 1970-01-09 Feldmuehle Ag
GB2252838A (en) * 1991-02-12 1992-08-19 Scimat Ltd Heat- or pressure-sensitive recording medium

Citations (4)

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US2519660A (en) * 1947-09-06 1950-08-22 Little Inc A Recording material
US2686676A (en) * 1949-04-08 1954-08-17 Dictaphone Corp Recording progress indicator for magnetic records
US2739909A (en) * 1950-06-29 1956-03-27 Nashua Corp Coated paper suitable for stylus inscription and method of making the same
US2859351A (en) * 1951-02-02 1958-11-04 Minnesota Mining & Mfg Method of making permanent facsimile copies

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US2653126A (en) * 1950-02-23 1953-09-22 Rca Corp Method of marking

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US2519660A (en) * 1947-09-06 1950-08-22 Little Inc A Recording material
US2686676A (en) * 1949-04-08 1954-08-17 Dictaphone Corp Recording progress indicator for magnetic records
US2739909A (en) * 1950-06-29 1956-03-27 Nashua Corp Coated paper suitable for stylus inscription and method of making the same
US2859351A (en) * 1951-02-02 1958-11-04 Minnesota Mining & Mfg Method of making permanent facsimile copies

Cited By (14)

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Publication number Priority date Publication date Assignee Title
US3145117A (en) * 1959-11-08 1964-08-18 Katchaisky Aharon Process for production of pressure sensitive recording medium
US3306763A (en) * 1961-02-15 1967-02-28 Oxford Paper Co Method of making heat sensitive recording sheet
US3111421A (en) * 1961-04-27 1963-11-19 Columbia Ribbon & Carbon Method for preparing pressure-sensitive duplicating elements
US3167443A (en) * 1961-07-07 1965-01-26 Interchem Corp Pressure sensitive copying sheet
US3180752A (en) * 1961-11-06 1965-04-27 Interchem Corp Heat-sensitive copying sheets
US3320089A (en) * 1964-03-09 1967-05-16 Judson Bigelow Inc Method of making blush coated recording sheet, coated sheet and coating composition
US3511700A (en) * 1964-10-21 1970-05-12 Litton Business Systems Inc Electro-sensitive marking blank
US3620806A (en) * 1968-05-17 1971-11-16 Westvaco Corp Blushed polystyrene coating on paper
US3869305A (en) * 1971-08-10 1975-03-04 Aluminum Co Of America Method for producing an opaque coating
US3928260A (en) * 1973-10-29 1975-12-23 Aluminum Co Of America Opaque white coating composition comprising essentially cellulose ester/cross-linking agent/catalyst/solvent and organic liquid
US3915726A (en) * 1973-11-14 1975-10-28 Ppg Industries Inc Production of void containing polymer films using an emulsified, high boiling non-solvent
US4296179A (en) * 1974-06-24 1981-10-20 Wardwell Charles R Frangible bonding using blush lacquer
CN117468268A (zh) * 2023-12-27 2024-01-30 湖南大道新材料有限公司 一种阻水纸袋及其制备方法与应用
CN117468268B (zh) * 2023-12-27 2024-03-22 湖南大道新材料有限公司 一种阻水纸袋及其制备方法与应用

Also Published As

Publication number Publication date
DE1153612B (de) 1963-08-29
GB868579A (en) 1961-05-17
CH377635A (de) 1964-05-15
NL262879A (en, 2012) 1900-01-01
FR1242396A (fr) 1960-09-30
NL261301A (en, 2012) 1900-01-01
CH370954A (de) 1963-07-31
NL99492C (en, 2012) 1900-01-01
NL102591C (en, 2012) 1900-01-01
NL243343A (en, 2012) 1900-01-01
CH377188A (de) 1964-04-30
NL102588C (en, 2012) 1900-01-01

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