US2983627A - Methods of making webs of fibrous material - Google Patents

Methods of making webs of fibrous material Download PDF

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Publication number
US2983627A
US2983627A US679778A US67977857A US2983627A US 2983627 A US2983627 A US 2983627A US 679778 A US679778 A US 679778A US 67977857 A US67977857 A US 67977857A US 2983627 A US2983627 A US 2983627A
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United States
Prior art keywords
web
nylon
fibres
solution
fibrous material
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
US679778A
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English (en)
Inventor
Williams Harold Malcolm Gordon
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.)
Portals Ltd
Original Assignee
Portals Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of US2983627A publication Critical patent/US2983627A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/26—Polyamides; Polyimides
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • 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]
    • Y10T428/31725—Of polyamide
    • Y10T428/31739—Nylon type
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
    • Y10T442/277—Coated or impregnated cellulosic fiber fabric
    • Y10T442/2811—Coating or impregnation contains polyimide or polyamide
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
    • Y10T442/2893—Coated or impregnated polyamide fiber fabric

Definitions

  • This invention is for improvements in or relating to methods of making webs of fibrous material and is particularly concerned with the manufacture of webs of fibrous material comprising a substantial proportion of synthetic fibre.
  • a method of making a web of fibrous material having a high flexibility and tear strength and consisting of or containing synthetic fibre comprises incorporating with the fibres either during or after formation of the web a binder consisting of a methyl methoxy derivative of nylon.
  • the web is impregnated with a solution of the binder, any excess of the solution removed and the web subsequently dried.
  • the web may comprise a waterleaf paper formed from a mixture of synthetic fibres with at least 10 percent by weight of cellulosic material.
  • the synthetic fibres are preferably nylon fibres.
  • the waterleaf paper may be formed by adding the synthetic, e.g. nylon, fibres cut to the desired staple length, to rag or cellulosic furnish in a heater, the synthetic fibres being dispersed throughout the total mass. Dispersion of the fibre may be assisted by a surface active material such as Dispersol v.w., and an anti-foaming agent may be added to suppress frothing.
  • the beaten stuff is diluted and formed into a web or sheet on a wire grid by couching in accordance with normal papermaking procedure, the couched sheet being passed to a drying cylinder and dried in the conventional fashion.
  • the waterleaf paper web or sheet is then passed through a bath containing the binder and withdrawn therefrom through squeeze rolls, the impregnated sheet being dried either by contact with a drying cylinder or by air drying.
  • the web of fibrous material consists of nylon fibres or a mixture of nylon and cellulose fibres formed on the wire grid by air deposition, or the web may consist solely of synthetic fibres, e.g. nylon fibres, which are formed into a lap by carding.
  • methyl methoxy derivatives of nylon employed to impregnate the web in accordance with one form of the present invention may be in solution in an alcohol/ water mixture.
  • methoxy nylon employed in the present invention is a substance known under the trade name Maranyl.
  • the binder may be added to the material from which the web is to be produced, the web subsequently formed and dried, and then the web heated to cause the binder to soften and unite the fibres.
  • a web of paper with attractive properties may be produced by adding the binder to the stuff either during the beating or prior to paper-making.
  • the treated sheet of paper is solvent to dissolve the binder.
  • the concentration, temperature and hence the viscosity and drainage time of the suspension of fibres in the alcoholic solution of the binder can be adjusted to the values required, on a cylinder paper making machine.
  • the web so formed may be fed directly to the drying system, or alternatively it may be passed through a water bath to partially coagulate the binder and sustain the stresses of the drying operation.
  • the web and coagulum formed by the process of the present invention may be coated with normal cellulosic paper-making fibres prior to the drying operation.
  • Such fibres may be applied either as a suspension in the water vat or directly on to the web by air deposition.
  • the cellulosic fibres may be applied directly to the web in the form of water-leaf paper. Subsequent pressing and drying compacts the whole mass into a web of paper.
  • Synthetic fibre-containing papers made in accordance with the present invention possess high flexibilities and burst figures.
  • the beaten stuff was diluted to 0.1 g. litre and drained on a wire, the sheet was couched, removed and dried by passage round a cylinder heated with steam at 25 lbs. p.s.1.
  • the resultant sheet when dried was passed through a bath containing 10% of methoxy nylon dissolved in 70:30 isopropyl alcoholzwater. The excess solution was removed by squeezing and the sheet dried by passage round a steam heated cylinder.
  • the methoxy nylon employed in this example and the subsequent examples was a substance sold under the tradename Maranyl.
  • the impregnated sheet had a binder content of 8% by Weight and a Schopper double fold of greater than 3,000.
  • the unimpregnated sheet had a double fold of 50.
  • Example 2 75 g. of 1.5 denier nylon staple were added by stirring to 225 g. of beaten rag and the stuff diluted to 0.2 g./litre. Sheets were made as in Example 1 and after pressing the sheet was air dried.
  • the sheets were impregnated by two passages through a 12% methoxy-nylon solution dissolved in methanol, the methanol solution being heated to 35 C. Excess solution was removed by squeezing and the sheets air dried.
  • Example 3 75 g. of nylon fabric were beaten in water at 50 C. to approximately A fibre length and 150 g. of beaten cotton added to the beater. 75 g. of nylon staple 1.5 denier were added and the whole mixed with the beater roll. Iso octyl alcohol was added to suppress frothing and waterleaf sheets made and dried as in Example 1.
  • the sheets were impregnated with a 15% of methoxy nylon solution in 80:20 ethanolzwater heated to 50 C. The sheets were squeezed to give a final resin content of 22%. Schopper double folds of greater than 5,000 were obtained. These sheets were too strong to tear in an Blmendorf tear tester and had Mullen burst figures of 96. Similar sheets in which no nylon was present had 3,500 double folds and tear values of 192 and burst figures of 40.
  • Example 4 /s" staple 3 denier nylon was admixed with a similar quantity of 1.5" 1.5 denier nylon and formed into a lap by carding. 6" square portions of this lap were impregnated with a 65:35 methanolzwater solution containing 10 parts by weight of methyl methoxy nylon. The excess solution was removed by squeezing through rubber rollers and the product dried on a cylinder heated by steam at 25 lbs. p.s.i. The resulting material contained approximately 8% of the methoxy nylon compound and had a good drape and handle.
  • Example 5 Synthetic fibres known under the registered trademark Terylene were dispersed by gently mixing in a 2% solution of methyl methoxy nylon dissolved in methanol. The dispersion was fed into a laboratory cylinder papermaking machine vat, and the cylinder rotated. The resultant web of fibres was couched and carried forward for drying, the liquor passing through the wire being returned for re-use. The web when dry, was reeled.
  • Example 6 The process of Example 5 was carried out except that the web of Terylene fibres whilst on the wire was dried by hot air. The methanol-laden air was subsequently treated for the recovery of methanol therefrom.
  • Example 7 The couched web of fibres produced substantially as in Example 5 was passed through a water bath to coagulate the methyl methoxy nylon binder and to remove the methanol therefrom. The emergent web was then passed through nip rolls to a conventional cylinder drying machine.
  • a method of making aweb of fibrous material having a high flexibility and tear strength and containing synthetic fibres comprises impregnating the fibres after the formation of the web with a solution of a methyl methoxy derivative of nylon, removing any excess of the solution and subsequently drying the web.
  • a method of making a web of paper having a high flexibility and tear strength comprises impregnating a web of waterleaf paper formed from a mixture of synthetic fibres with at least 10% by weight of cellulosic material with a solution of a methyl methoxy derivative of nylon, removing any excess of the solution and subsequently drying the web.
  • a method of making a web of paper having a high flexibility and tear strength and containing synthetic fibres comprises impregnating a web of waterleaf paper with a solution of a methyl methoxy derivative of nylon, removing any excess of the solution and subsequently drying the web, said waterleaf paper being formed by adding synthetic fibres to cellulosic material, in a beater, diluting the beaten stuff and forming it into a web on a wire grid by couching, the couched sheet being passed to a drying cylinder and dried.
  • a method of making a web of fibrous material having a high flexibility and tear strength comprises impregnating a web consisting of nylon fibres formed on a wire grid by air deposition with an alcohol/ water solution of a methyl methoxy derivative of nylon, removing any excess of the solution and subsequently drying the web.
  • a method of making a web of fibrous material having a high flexibility and tear strength comprises impregnating a web consisting of a mixture of nylon and cellulose fibres formed on a wire grid by air deposition with a solution of a methyl methoxy derivative of nylon, removing any excess of the solution and subsequently drying the web.
  • a method of making a web of fibrous material having a high flexibility and tear strength comprises impregnating a web consisting solely of synthetic fibres formed into a lap by carding with a solution of a methyl methoxy derivative of nylon, removing any excess of the solution and subsequently drying the web.
  • a method of making a web of fibrous material having a high flexibility and tear strength and containing synthetic fibres comprises dispersing the fibres in an alcoholic solution of a methyl methoxy derivative of nylon and subsequently forming and drying the web.
  • a web of fibrous material having a high flexibility and tear strength and containing synthetic fibers characterized in that the fibrous material of the web is bound with a binder consisting of an alcohol soluble, methyl methoxy nylon.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Filtering Materials (AREA)
  • Nonwoven Fabrics (AREA)
US679778A 1956-08-23 1957-08-22 Methods of making webs of fibrous material Expired - Lifetime US2983627A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25844/56A GB820785A (en) 1956-08-23 1956-08-23 Improvements in or relating to methods of making webs of paper containing synthetic fibrous material

Publications (1)

Publication Number Publication Date
US2983627A true US2983627A (en) 1961-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US679778A Expired - Lifetime US2983627A (en) 1956-08-23 1957-08-22 Methods of making webs of fibrous material

Country Status (4)

Country Link
US (1) US2983627A (fr)
DE (1) DE1070491B (fr)
FR (2) FR1181575A (fr)
GB (2) GB820785A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054147A (en) * 1960-12-30 1962-09-18 Paul B Archibald Method for solvent-isostatic pressing
US3141813A (en) * 1960-09-01 1964-07-21 Schweizerische Viscose Process of impregnating paper containing synthetic fibers and an amineformaldehyde resin with copolyamide and polyacrylic acid ester
US3620797A (en) * 1969-01-14 1971-11-16 Dhj Ind Inc Impregnation of a nonwoven fabric
US4028457A (en) * 1973-04-16 1977-06-07 Domtar Limited Consolidation of dry formed webs
EP0340691A2 (fr) * 1988-05-03 1989-11-08 Seeber KG Méthode et dispositif de fabrication d'une nappe de fibres

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206763B (de) * 1961-01-28 1965-12-09 Ornapress A G Verfahren zum Verzieren von Formkoerpern

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2357392A (en) * 1941-03-01 1944-09-05 Sylvania Ind Corp Process for producing fibrous products
US2496665A (en) * 1949-06-10 1950-02-07 William A Hermanson Composite transparent sheet
US2581069A (en) * 1945-09-24 1952-01-01 Raybestos Manhattan Inc Apparatus for producing airlaid fibrous webs
GB708622A (en) * 1950-07-27 1954-05-05 Ici Ltd Improvements in or relating to impregnated paper
GB715932A (en) * 1952-09-23 1954-09-22 C H Dexter & Sons Inc Improvements in porous fibrous web material and method of making same
US2714097A (en) * 1951-11-27 1955-07-26 Du Pont Aqueous dispersions of n-alkoxymethylpolyhexamethylene adipamides and their application
US2816851A (en) * 1956-07-27 1957-12-17 Hurlbut Paper Company Decorative laminate containing a transparent printed overlay sheet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2357392A (en) * 1941-03-01 1944-09-05 Sylvania Ind Corp Process for producing fibrous products
US2581069A (en) * 1945-09-24 1952-01-01 Raybestos Manhattan Inc Apparatus for producing airlaid fibrous webs
US2496665A (en) * 1949-06-10 1950-02-07 William A Hermanson Composite transparent sheet
GB708622A (en) * 1950-07-27 1954-05-05 Ici Ltd Improvements in or relating to impregnated paper
US2714097A (en) * 1951-11-27 1955-07-26 Du Pont Aqueous dispersions of n-alkoxymethylpolyhexamethylene adipamides and their application
GB715932A (en) * 1952-09-23 1954-09-22 C H Dexter & Sons Inc Improvements in porous fibrous web material and method of making same
US2816851A (en) * 1956-07-27 1957-12-17 Hurlbut Paper Company Decorative laminate containing a transparent printed overlay sheet

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141813A (en) * 1960-09-01 1964-07-21 Schweizerische Viscose Process of impregnating paper containing synthetic fibers and an amineformaldehyde resin with copolyamide and polyacrylic acid ester
US3141812A (en) * 1960-09-01 1964-07-21 Schweizerische Viscose Process of impregnating paper containing synthetic fibers and an amine formaldehyde precondensate with a film forming linear copolyamide
US3054147A (en) * 1960-12-30 1962-09-18 Paul B Archibald Method for solvent-isostatic pressing
US3620797A (en) * 1969-01-14 1971-11-16 Dhj Ind Inc Impregnation of a nonwoven fabric
US4028457A (en) * 1973-04-16 1977-06-07 Domtar Limited Consolidation of dry formed webs
EP0340691A2 (fr) * 1988-05-03 1989-11-08 Seeber KG Méthode et dispositif de fabrication d'une nappe de fibres
US4997607A (en) * 1988-05-03 1991-03-05 Casimir Kast Formteile Gmbh & Co. Process for the production of a fibrous mat
EP0340691A3 (fr) * 1988-05-03 1992-04-15 Seeber KG Méthode et dispositif de fabrication d'une nappe de fibres

Also Published As

Publication number Publication date
GB820786A (en) 1959-09-23
GB820785A (en) 1959-09-23
FR1181575A (fr) 1959-06-17
FR1190722A (fr) 1959-10-14
DE1070491B (de) 1959-12-03

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