US3034922A - Water-soluble paper and method of making it - Google Patents

Water-soluble paper and method of making it Download PDF

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US3034922A
US3034922A US82894359A US3034922A US 3034922 A US3034922 A US 3034922A US 82894359 A US82894359 A US 82894359A US 3034922 A US3034922 A US 3034922A
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water
paper
fibres
parts
weight
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Boe Hans
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Freudenberg Carl KG
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Freudenberg Carl KG
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/645Impregnation followed by a solidification process
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03Non-macromolecular organic compounds
    • D21H17/05Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/06Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03Non-macromolecular organic compounds
    • D21H17/05Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/07Nitrogen-containing compounds
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/21Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24Polysaccharides
    • D21H17/25Cellulose
    • D21H17/27Esters thereof
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/21Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24Polysaccharides
    • D21H17/28Starch
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/33Synthetic macromolecular compounds
    • D21H17/34Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/42Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
    • D21H17/43Carboxyl groups or derivatives thereof
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/66Salts, e.g. alums
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/67Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/68Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913Rod, strand, filament or fiber
    • Y10T428/2933Coated or with bond, impregnation or core
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/8305Miscellaneous [e.g., treated surfaces, etc.]

Description

United States Patent 3,034,922 WATER-SOLUBLE PAPER AND METHOD OF MAKING IT Hans Bile, Augsburg, Germany, assignor to Firms Carl Freudenberg, Kommanditgesellsehaft auf Aktien, Weinheim-Bergstr., Germany No Drawing. Filed July 23, 1959, Ser. No. 828,943

Claims priority, application Germany Aug. 1, 1953 2 Claims. (Cl. 117-63) The essential process in the manufacture of paper is the felting of the fibres, which are necessary for the formation of the paper, in the shaking screen machine, leading to the formation of a fibrous mass which is no longer soluble in water. Paper, even when it is unsized, for example filter or blotting paper, is therefore insoluble in water. It is true that the paper fibres will swell and that the wet strength of the paper is lower than the dry strength, but the fibre bond remains stable, so that any wet paper can be dried and its original strength thus more or less restored.

If the paper is additionally sized, as for example with Writing paper, the material has great resistance to water and is stable and relatively unchanged even after remaining in contact with water for hours.

A paper which disintegrates into its component parts in water cannot therefore be produced by the normal papermaking method, as the felting of the paper fibres results in a bond which is stable even in water.

It has now been found that a paper which in water disintegrates into its individual components can be produced by impregnating with a suitable water-soluble and film-forming substance fibres which have been united to form a loose fibre fleece, for example by means of carding machines or fiat cards or by means of a Rando-Webb machine, thereupon drying them and forming the resulting material, if desired after re-wetting, into a paper-like product by calendering.

Natural and synthetic fibres, such as cotton, linen, hemp, ramie, Wool, viscose staple fibre, acetate staple fibre, Perlon, nylon, Trevira, polyvinyl alcohol fibres or alginate fibres, are suitable for this process.

Water-soluble, film-forming substances may be used as binders, such as for example methyl cellulose, cellulose glycolates, polyacrylic acid and acrylates, polymerisation products on a basis of vinyl pyrrolidone, polycarboxylic acids, water-soluble urea formaldehyde condensation products, decomposed glues, water-soluble starch products, dextrins, and sugars; alkali, ammonium, and triethanolamine alginates; carrageen moss solutions, alkali caseinates, or waterglass (alkali metal silicate). The amount of the water-soluble film-forming binder to be incorporated in the fibrous structure is preferably 40%- 100% of the weight of the fibres.

Known fillers, such as kaolin, chalk, talcum, gypsum, magnesite, pearl white, lithopone, titanium dioxide, kieselguhr, microcellulose, asbestos, and if desired emollients or hygroscopic media, such as glycerine, glycols, polyglcols, and urea, and if desired water-soluble dyestufis may be added to these binders and the loose fibre fleece may be impregnated with an aqueous mixture on any of the well-known machines, e.g. a screen saturator, and dried. The concentration of said aqueous mixture depends upon the type of the employed machine. Generally, the aqueous mixture should contain 5 to 50% of said film-forming binders and fillers. Those skilled in the art will find out the preferable concentration for a specific case without difiiculties. The amount of the fillers and emollients which may be added preferably amounts to 60%-200% of the weight of the dry fibers. The resulting intermediate product, after first being wetted "icethe handle and the smoothness of the finished material depends on the pressure and the temperature of the rolls.

Thus it ispossible to produce papers, which in water disintegrate into their constituents. The weight of such paper is about 40 grams per square metre for carbon copy paper, grams per square metre for writing papers, and to grams per square metre for book papers or the like. These papers can be written on normally with ink, ball point pen, or pencil, or used to make the normal number of carbon copies in the typewriter, and can just as easily be used for stencil duplicating. When the above mentioned papers are contacted with water, the binder material will be dissolved, thus releasing the individual fibres from the sheet and leaving a soft pulpy mass. This procedure takes only a few minutes. But even before the paper sheet has fully disintegrated, the writing on said paper becomes undecipherable immediately when subjecting it to the action of hot or cold water. Not only single sheets of paper, but even documents or books in which many sheets of this type are superimposed may be made undecipherable in this way.

The novel paper products are especially suitable for military purposes. So, radio operators no longer have to burn each sheet after reception and decoding of a cable. It is enough to destroy the text written on the novel paper products by dipping it into water.

The novel paper products are also suitable for the production of log books for battle ships and submarines. If such naval units should sink in shallow enemy coastal water, it is impossible for enemy divers to rescue and decipher the log books which may contain secret matter.

The invention will now be described with reference to the following typical examples in which the proportions given are by weight.

Example 1 A matted fibre fleece composed of 100% staple fibres with a weight of 24 grams per square metre is impregnated with an aqueous mixture containing:

30 parts of cellulose glycolate, 20 parts of maize dextrine,

15 parts of chalk,

15 parts of kaolin,

40 parts of gypsum,

1 part of wetting agent.

The intermediate product obtained after impregnating on a screen saturator and drying, with a Weight of about 80 grams per square metre, is smoothed, after wetting to a moisture content of about 5%, on a heated calender at about C., and cut. A smooth, strong writing paper is obtained, which swells on cold water in a few minutes and, after dissolution of the fibre bond, leaves behind a mixture of insoluble fibres.

Example 2 A carded fleece of 50% staple fibres and 50% polyamide fibres, with a weight of 60 grams per square metre, is impregnated with an aqueous mixture containing:

50 parts of polyacrylate, 10 parts of urea,

20 parts of gypsum,

10 parts of pearl white, 10 parts of talcum,

1 part of Wetting agent.

After impregnation and drying an intermediate product with a weight of 150 grams per square metre is obtained,

which is wetted and calendered with increasing pressure at about 150 C., and thereupon cut. If the resulting paper is soaked in water, it breaks up into its fibrous constituents.

Example 3 A longitudinally directed carded fleece, consisting of 25% polyamide fibres, 25% acetate staple fibres, 20% ramie, 30% cotton, with a weight of 16 grams per square metre, is impregnated with an aqueous mixture containmg:

33 parts of water-soluble starch, 5 parts of polyglycol,

15 parts of microcellulose,

20 parts of titanium dioxide,

20 parts of gypsum,

6 parts of lithopone,

1 part of wetting agent.

The impregnated and dried first stuff with a weight of about 40 grams per square metre is calendered, after wetting, with a roll temperature of about 100 C. This thinner paper disintegrates into its constituents after a very short time in water.

I claim:

1. In a method of producing a writing paper which in Water disintegrates into its individual components, the steps of impregnating a fleece of cardable textile fibres with an aqueous dispersion containing a water-insoluble filler material and a Water-soluble film-forming binder in such amounts as to incorporate said binder material in an amount of to 200 percent, based upon the weight of the dry fibre fleece, drying the thus resulting structure, re-wetting said dry structure to a moisture content of about 3 to 10 percent and smoothing it on a heated calender at a temperature between and C.

2. A writing paper which in water disintegrates into its individual components consisting of cardable textile fibres being bonded together with a Water-soluble filmforming binder and containing insoluble filler material.

References Cited in the file of this patent UNITED STATES PATENTS 1,518,944 Sulzberger Dec. 9, 1924 2,208,653 Whitehead July 23, 1940 2,402,542 Foote et al June 25, 1946 2,705,688 Ness et al Apr. 5, 1955 2,880,113 Drelich Mar. 31, 1959 2,893,754 Richter et al. July 7, 1959

Claims (1)

1. IN A METHOD OF PRODUCING A WRITING PAPER WHICH IN WATER DISINTEGRATES INTO ITS INDIVIDUAL COMPONENTS, THE STEPS OF IMPREGNATING A FLEECE OF CARDABLE TEXTILE FIBRES WITH AN AQUEOUS DISPERSION COTAINING A WATER-INSOLUBLE FILLER MATERIAL AND A WATER-SOLUBLE FILM-FORMING BINDER IN SUCH AMOUNTS AS TO INCORPORATE SAID BINDER MATERIAL IN AN AMOUNT OF 40 TO 200 PERCENT, BASED UPON THE WEIGHT OF THE DRY FIBRE FLEECE, DRYING THE THUS RESULTING STRUCTURE, RE-WETTING SAID DRY STRUCTURE TO A MOISTURE CONTENT OF ABOUT 3 TO 10 PERCENT AND SMOOTHING IT ON A HEATED CALENDER AT A TEMPERATURE BETWEEN 50 AND 150*C.
US3034922A 1958-08-01 1959-07-23 Water-soluble paper and method of making it Expired - Lifetime US3034922A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1958F0026304 DE1126233B (en) 1958-08-01 1958-08-01 A process for producing a rapidly disintegrating in water in the paper non-woven fabric base
DE1959F0028080 DE1149603B (en) 1958-08-01 1959-03-28 A process for producing a rapidly disintegrating in water in the paper non-woven fabric having improved burning characteristics

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259104A (en) * 1962-03-13 1966-07-05 Milton L Gerber Apparatus for manufacturing a product
US3431166A (en) * 1964-10-14 1969-03-04 Mishima Paper Mfg Co Ltd Method of making paper which dissolves in water containing papermaking fibers and fibrous cellulose-glycolic acid
US3594928A (en) * 1968-06-13 1971-07-27 Bristol Myers Co Paper having areas dissolvable in water
US3602225A (en) * 1969-05-07 1971-08-31 Fmc Corp Biodegradable absorbent pad
US3607359A (en) * 1967-01-12 1971-09-21 Freudenberg Carl Process for the manufacture of unwoven fabrics bonded with a binding agent and having a smooth surface
US3610245A (en) * 1969-04-10 1971-10-05 Kimberly Clark Co Flushable wrapper for absorbent pads and pad covered therewith
US3640841A (en) * 1969-04-29 1972-02-08 Borden Co Method for controlling adhesion of paper on yankee drier with polyamides and resultant products
US3903889A (en) * 1973-02-16 1975-09-09 First National Bank Of Nevada Disposable liquid absorbent products
US3936347A (en) * 1973-09-05 1976-02-03 Sumitomo Chemical Company, Limited Paper composed mainly of pullulan fibers and method for producing the same
US3993640A (en) * 1973-12-21 1976-11-23 Laporte Industries Limited Treatment of cellulosic materials
US4009313A (en) * 1972-08-30 1977-02-22 Minnesota Mining And Manufacturing Company Enzymatically dispersible non-woven webs
US4061468A (en) * 1974-07-30 1977-12-06 Boehringer Mannheim Gmbh Stable test strips having a water-soluble paper layer and methods for making same
US4124116A (en) * 1977-02-15 1978-11-07 Mccabe Jr Edward G Liquid absorbing sectional pack
US4224366A (en) * 1978-10-19 1980-09-23 Mccabe Jr Edward G Moisture absorption sectional pack
US4543410A (en) * 1982-06-21 1985-09-24 Morca, Inc. Absorbent cellulosic base structures
US4655382A (en) * 1985-11-12 1987-04-07 Raychem Corp. Materials for use in forming electronic interconnect
DK152172B (en) * 1975-12-15 1988-02-08 Hoffmann La Roche A process for preparing a solid pharmaceutical unit dosage form
US4956300A (en) * 1982-01-05 1990-09-11 Helena Laboratories Corporation Aid for determining the presence of occult blood, method of making the aid, and method of using the aid
US5081040A (en) * 1987-06-29 1992-01-14 Helena Laboratories Corporation Composition and kit for testing for occult blood in human and animal excretions, fluids, or tissue matrixes
US5196167A (en) * 1989-04-04 1993-03-23 Helena Laboratories Corporation Fecal occult blood test product with positive and negative controls
US5217874A (en) * 1989-04-04 1993-06-08 Helena Laboratories Corporation Fecal occult blood test product with positive and negative controls
US5273888A (en) * 1984-01-16 1993-12-28 Helena Laboratories Corporation Chemical test kit and method for determining the presence of blood in a specimen and for verifying the effectiveness of the chemicals
US5474545A (en) * 1992-12-07 1995-12-12 Chikazawa; Osamu Diaper and/or sanitary napkin
US5702913A (en) * 1983-12-21 1997-12-30 Helena Laboratories Corporation Chromgen-reagent test system
US20150122938A1 (en) * 2007-06-14 2015-05-07 Sca Tissue France Core intended to be used as a support for a roll of paper
EP2964823A4 (en) * 2013-03-08 2016-11-16 Rhodia Operations Dispersible fiber bundles and suspensions using environmenttally-friendly solvents

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394218A (en) * 1966-04-25 1968-07-23 Sanders Associates Inc Destructible printed circuit assemblies containing oxidants
EP0035980A1 (en) * 1980-03-10 1981-09-16 Norabel Ab Method and means for pyrolytic destruction of documents
GB2119709B (en) * 1982-04-27 1986-11-26 Adrian Hilton Ellam Hygiene material

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1518944A (en) * 1920-09-13 1924-12-09 Sulzberger Nathan Asbestos paper, etc.
US2208653A (en) * 1937-09-16 1940-07-23 Celanese Corp Safety paper
US2402542A (en) * 1943-04-22 1946-06-25 American Bank Note Co Coated paper and method of making same
US2705688A (en) * 1952-04-07 1955-04-05 Chicopee Mfg Corp Nonwoven fabric and method of producing same
US2880113A (en) * 1956-01-11 1959-03-31 Chicopee Mfg Corp Durable nonwoven fabric and method
US2893754A (en) * 1944-02-29 1959-07-07 George A Richter Special papers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE211902C (en) *

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1518944A (en) * 1920-09-13 1924-12-09 Sulzberger Nathan Asbestos paper, etc.
US2208653A (en) * 1937-09-16 1940-07-23 Celanese Corp Safety paper
US2402542A (en) * 1943-04-22 1946-06-25 American Bank Note Co Coated paper and method of making same
US2893754A (en) * 1944-02-29 1959-07-07 George A Richter Special papers
US2705688A (en) * 1952-04-07 1955-04-05 Chicopee Mfg Corp Nonwoven fabric and method of producing same
US2880113A (en) * 1956-01-11 1959-03-31 Chicopee Mfg Corp Durable nonwoven fabric and method

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259104A (en) * 1962-03-13 1966-07-05 Milton L Gerber Apparatus for manufacturing a product
US3431166A (en) * 1964-10-14 1969-03-04 Mishima Paper Mfg Co Ltd Method of making paper which dissolves in water containing papermaking fibers and fibrous cellulose-glycolic acid
US3607359A (en) * 1967-01-12 1971-09-21 Freudenberg Carl Process for the manufacture of unwoven fabrics bonded with a binding agent and having a smooth surface
US3594928A (en) * 1968-06-13 1971-07-27 Bristol Myers Co Paper having areas dissolvable in water
US3610245A (en) * 1969-04-10 1971-10-05 Kimberly Clark Co Flushable wrapper for absorbent pads and pad covered therewith
US3640841A (en) * 1969-04-29 1972-02-08 Borden Co Method for controlling adhesion of paper on yankee drier with polyamides and resultant products
US3602225A (en) * 1969-05-07 1971-08-31 Fmc Corp Biodegradable absorbent pad
US4009313A (en) * 1972-08-30 1977-02-22 Minnesota Mining And Manufacturing Company Enzymatically dispersible non-woven webs
US3903889A (en) * 1973-02-16 1975-09-09 First National Bank Of Nevada Disposable liquid absorbent products
US3936347A (en) * 1973-09-05 1976-02-03 Sumitomo Chemical Company, Limited Paper composed mainly of pullulan fibers and method for producing the same
US3993640A (en) * 1973-12-21 1976-11-23 Laporte Industries Limited Treatment of cellulosic materials
US4061468A (en) * 1974-07-30 1977-12-06 Boehringer Mannheim Gmbh Stable test strips having a water-soluble paper layer and methods for making same
DK152172B (en) * 1975-12-15 1988-02-08 Hoffmann La Roche A process for preparing a solid pharmaceutical unit dosage form
US4124116A (en) * 1977-02-15 1978-11-07 Mccabe Jr Edward G Liquid absorbing sectional pack
US4224366A (en) * 1978-10-19 1980-09-23 Mccabe Jr Edward G Moisture absorption sectional pack
US4956300A (en) * 1982-01-05 1990-09-11 Helena Laboratories Corporation Aid for determining the presence of occult blood, method of making the aid, and method of using the aid
US4543410A (en) * 1982-06-21 1985-09-24 Morca, Inc. Absorbent cellulosic base structures
US5702913A (en) * 1983-12-21 1997-12-30 Helena Laboratories Corporation Chromgen-reagent test system
US5273888A (en) * 1984-01-16 1993-12-28 Helena Laboratories Corporation Chemical test kit and method for determining the presence of blood in a specimen and for verifying the effectiveness of the chemicals
US4655382A (en) * 1985-11-12 1987-04-07 Raychem Corp. Materials for use in forming electronic interconnect
US5081040A (en) * 1987-06-29 1992-01-14 Helena Laboratories Corporation Composition and kit for testing for occult blood in human and animal excretions, fluids, or tissue matrixes
US5196167A (en) * 1989-04-04 1993-03-23 Helena Laboratories Corporation Fecal occult blood test product with positive and negative controls
US5217874A (en) * 1989-04-04 1993-06-08 Helena Laboratories Corporation Fecal occult blood test product with positive and negative controls
US5474545A (en) * 1992-12-07 1995-12-12 Chikazawa; Osamu Diaper and/or sanitary napkin
US20150122938A1 (en) * 2007-06-14 2015-05-07 Sca Tissue France Core intended to be used as a support for a roll of paper
US9409745B2 (en) * 2007-06-14 2016-08-09 Sca Tissue France Core intended to be used as a support for a roll of paper
EP2964823A4 (en) * 2013-03-08 2016-11-16 Rhodia Operations Dispersible fiber bundles and suspensions using environmenttally-friendly solvents

Also Published As

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DE1149603B (en) 1963-05-30 application
GB922756A (en) 1963-04-03 application
NL274354A (en) application
NL272052A (en) application
GB945771A (en) 1964-01-08 application

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