US3193447A - Manufacture of paper-like materials comprising synthetic fibres - Google Patents

Manufacture of paper-like materials comprising synthetic fibres Download PDF

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Publication number
US3193447A
US3193447A US178263A US17826362A US3193447A US 3193447 A US3193447 A US 3193447A US 178263 A US178263 A US 178263A US 17826362 A US17826362 A US 17826362A US 3193447 A US3193447 A US 3193447A
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United States
Prior art keywords
fibres
paper
ethoxylated
water
synthetic fibres
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
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US178263A
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English (en)
Inventor
Marek Bruno Stefan Vladimir
Gneisz Josef
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.)
Viscosuisse SA
Original Assignee
Societe de la Viscose Suisse SA
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Filing date
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Publication of US3193447A publication Critical patent/US3193447A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
    • D21H5/1254—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of fibres which have been treated to improve their dispersion in the paper-making furnish
    • 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

Definitions

  • paper-like materials denotes materials in sheet form such as can be manufactured by means known in the paper making art.
  • fibrous starting material must be homogeneously distributed in water.
  • synthetic fibres since synthetic fibres are generally difiicult to wet, they may be given a coating of a dispersant in order to assist their distribution.
  • a wide variety of compounds have been proposed as dispersants for synthetic fibres, for example cellulose ethers, partially hydrolysed polyvinyl acetate, polyethylene glycols, and also cationic and anionic compounds.
  • An object of the present invention is to provide a dispersant for synthetic fibres which substantially reduces the difficulties heretofore involved in the preparation of aper-like materials comprising synthetic fibres.
  • a further object of the invention is to provide paperlike materials comprising synthetic fibres displaying a more even distribution of the fibres.
  • the present invention therefore provides a process for the production of paperlike material comprising synthetic fibres by forming the paper-like material from an aqueous suspension containing the synthetic fibres wherein the synthetic fibres have a coating of a Water-soluble N-ethoxylated polyamide.
  • the invention further comprises the paper-like materials so-produced which consist partially or wholly of synthetic fibres.
  • the degree of ethoxylation of the polyamide used as dispersant suitably corresponds to 8 to 12 mols of ethylene oxide per gram atom of nitrogen.
  • Particularly suitable N-ethoxylated polyamides are N-ethoxylated polycaproamide and N-ethoxylated copolyamides obtainable from e-amino-caprolactam and hexamethylene diamine adipate, e.g., using 50 to 70%, especially 60%, of eamino-caprolactam and 50 to 30%, especially 40%, hexamethylene diamine adipate. These compounds dissolve in water readily, both insofar as the speed of solution and the maximum concentration of the solution are concerned.
  • the synthetic fibres are preferably treated with an aqueous solution containing to grams of N-thoxylated polyamide per litre of water at a moderately raised temperature, e.g., to 50 C.
  • the fibres can then be removed from the dispersion and dried at room temperature or with the aid of heat, and later redispersed.
  • the polymers from which the artificial fibres may be prepared include polyamides, for example polycaproamide, the polyamide of w-amino-undecanoic acid, polyhexamethylene adip-amide, polyhexamethylene sebacamide, and condensation products of dicarboxylic acids with aliphatic, alicyclic or aromatic diamines generally; polyurethanes; polyesters, e.g., polyethylene terephthalate and copolymers of terephthalic and isophthalic acids and ethylene glycol; polyvinyl acetate and c-opolymers of vinyl acetate, e.g., with vinyl chloride, vinylidene cyanide or acrylonitrile; polyacrylonitrile and copolymers of acrylonitrile, e.g., with vinyl chloride; and poly-tetrafiuoroethylene.
  • polyamides for example polycaproamide, the polyamide of w-amino-undecanoic acid, polyhexam
  • the synthetic fibres may be formed by melt, dry or wet spinning methods, as by extruding spinning compositions through spinnerets, or by precipitation from solutions.
  • the application of the N-ethoxylated polyamide to the synthetic fibres may be performed at any stage of their manufacture.
  • the treatment of spun synthetic fibres with N-ethoxylated polyamides can be carried out during spinning, prior to the stretching operation, before or after cutting the filaments up into staple, or immediately prior to incorporation in the paper stock; If the synthetic fibres have previously been treated with other agents, it is in general possible to remove the latter (if desired) as by Washing with a warm dilute aqueous soda solution.
  • the cellulose component used is in the form ofso-called polynosic short staple fibres (see article in Reyon Zellwolle undding Chemiefasern, 9, page 431 [1959]) or other viscose short staple fibres
  • polyamide or polyester fibres in the aqueous dispersion, from which a sheet having the corresponding content of synthetic fibres and having special properties can be made.
  • ground cellulose and rag cellulose for example, paper-like materials containing up to by weight of synthetic fibres can be manufactured.
  • a sheet produced in this manner is characterised by the even distribution of the fibres, as can be seen, for example, by looking through the finished paper. Papers made from fibre dispersions prepared with unsuitable dispersants display an uneven distribution of the fibres when inspected in transmitted light.
  • Example 1 The dispersing material used is an ethoxylated copolyamide from 60% of e-aminocaprolactam and 40% of hexamethylene diamine adipate containing 2.4% of nitrogen, which corresponds to a degree of ethoxylation of 10.5 mols of ethylene oxide per gram atom of nitrogen.
  • the compound is soluble in water to an extent of 25 to 30%, and a 2% aqueous solution has at 20 C.
  • Nylon short staple fibres 3 denier/ 6 mm. long were first V freed from dressing by being washed with water containing soda and then centrifuged. They were then treated with an aqueous solution of the dispersing material. From .part, ofthe dispersion so obtained the fibres were removed and then dried for 2 hours at 65 C. In both cases the fibres were very easily wetted by water, as revealed by the speed at which the fibres settled down on When the suspension was thoroughly stirred, very even suspensions substantially fast to flocculation were obtained.
  • Example 2 The dispersing material used was an N-ethoxylated polycaproamide which contained 2.68% of nitrogen, corresponding to a degree of ethoxylation of 9 mols of ethylene oxide per gram atom of nitrogen. A 2% aqueous solution of the product has a viscosity of 1.6 centipoises at C. The product melts at 151 C. After this N-ethoxylated polycaproamide has been absorbed on the fibres referred toin Example 1 in the manner described above, they are easy to moisten and are homogeneously distributed in water, that is to say their behaviour is identical with that of the fibres pretreated with the N- ethoxylated copolyamide described in Example '1.
  • Example 3 The fibres used in this example were-not melt spun through spinnerets but precipitated, being moist polyester fibrids '(product of E. I. du Pont de Nemours and Co.) Type 201, as described for instance in French specification No. 1,214,126, corresponding to 100 grams of' dry substance, are stirred for 40 minutes at C. in 10 times their own weight of a 2% solution of N-ethoxylated caproamide, as described in Example 2, then suctionfiltered and dried for 48 hours at room temperature over phosphorus pentoxide. In an identical manner 100 grams of dry substance of the above fibrids are treated'with water only and then dried.
  • the fibrids treated with N- ethoxylated caproamide could be dispersed homogeneously within a short time.
  • the fibrids treated with water only are diflicult to moisten with water, and they require a much longer mechanical treatment in water to achieve their homogeneous distribution.
  • Example 5 660 grams of aspen sulphite cellulose and 180 grams of fibrillated rag cellulose are thoroughly beaten in litres of water in a stufi blending chest, and 360 grams of polyhexamethylene adipamide fibres (2 denier/4 mm. long) are stirred portionwise into the fibre suspension. Before being mixed with the cellulose pulp the polyamide fibres are treated for 30 minutes at 45 C. with a solution containing per litre 10 grams of an ethoxylated polycaproamide (degree of ethox-ylation: 9 moles of ethylene oxide per gram atom nitrogen), then centrifuged and dried in air.
  • an ethoxylated polycaproamide degree of ethox-ylation: 9 moles of ethylene oxide per gram atom nitrogen
  • the mixture in the stock blending chest is made up to 200, litres, and the fibre suspension (stutt density of 0.2 to 0.3%) is processed on a Fourdrinier machine having a fourdrinier ,wire '40 cm. wide into a uniform, paper-like sheet. When viewed in transmitted light the paper has a much better appearance than similar paper made with polyamide fibres treated with conventional dispersants. On the Fourdrinier-machine no disturbing foaming is observed nor does sticking at the wet end or in the fourdrinier section occur.
  • fibers include fibers selected from the group consisting of natural polymeric fibers and modified natural polymeric fibers.
  • N-ethoxylated polyamide is the N-ethoxylated copolyamide of e-aminocaprolactam and hexamethylene diamine adipate.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
US178263A 1961-03-15 1962-03-08 Manufacture of paper-like materials comprising synthetic fibres Expired - Lifetime US3193447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH313361A CH386234A (de) 1961-03-15 1961-03-15 Verfahren zur Herstellung von papierartigen Gebilden mit Hilfe von wässrigen Suspensionen synthetischer Fasern

Publications (1)

Publication Number Publication Date
US3193447A true US3193447A (en) 1965-07-06

Family

ID=4249320

Family Applications (1)

Application Number Title Priority Date Filing Date
US178263A Expired - Lifetime US3193447A (en) 1961-03-15 1962-03-08 Manufacture of paper-like materials comprising synthetic fibres

Country Status (7)

Country Link
US (1) US3193447A (en, 2012)
BE (1) BE614510A (en, 2012)
CH (1) CH386234A (en, 2012)
DE (1) DE1218871B (en, 2012)
GB (1) GB958430A (en, 2012)
LU (1) LU41352A1 (en, 2012)
NL (2) NL275735A (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392861A (en) * 1980-10-14 1983-07-12 Johnson & Johnson Baby Products Company Two-ply fibrous facing material
US4425126A (en) 1979-12-28 1984-01-10 Johnson & Johnson Baby Products Company Fibrous material and method of making the same using thermoplastic synthetic wood pulp fibers

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179543A (en) 1976-08-19 1979-12-18 Hoechst Fibers Industries, Division Of American Hoechst Corporation Staple fiber, finish therefor and process for use of same
US4294883A (en) 1976-08-19 1981-10-13 Hoechst Fibers Industries, Div. Of American Hoechst Corporation Staple fiber, finish therefor and process for use of same
JPS62502482A (ja) 1985-04-09 1987-09-24 イ−・アイ・デユポン・デ・ニモアス・アンド・カンパニ− 新規な合成水分散性繊維
GB8621680D0 (en) * 1986-09-09 1986-10-15 Du Pont Filler compositions

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467186A (en) * 1945-04-20 1949-04-12 Du Pont Aqueous dispersions of synthetic linear polyamide and process for obtaining same
US2810645A (en) * 1950-02-09 1957-10-22 American Viscose Corp Method of making textile webs
US2844491A (en) * 1955-04-29 1958-07-22 Du Pont Paper-like pellicle and method for producing same
US2869435A (en) * 1956-01-03 1959-01-20 Du Pont Process and product
CA602822A (en) * 1960-08-02 Portals Limited Methods of making webs of fibrous material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL110066C (en, 2012) * 1958-04-14
DE1144580B (de) * 1960-01-07 1963-02-28 Lipaco S A Verfahren zum Herstellen von Papier durch Dispergieren von Fasern, von denen mindestens ein Teil aus regenerierter Cellulose besteht

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA602822A (en) * 1960-08-02 Portals Limited Methods of making webs of fibrous material
US2467186A (en) * 1945-04-20 1949-04-12 Du Pont Aqueous dispersions of synthetic linear polyamide and process for obtaining same
US2810645A (en) * 1950-02-09 1957-10-22 American Viscose Corp Method of making textile webs
US2844491A (en) * 1955-04-29 1958-07-22 Du Pont Paper-like pellicle and method for producing same
US2869435A (en) * 1956-01-03 1959-01-20 Du Pont Process and product
GB847617A (en) * 1956-01-03 1960-09-14 Du Pont Improvements in or relating to the production of fibrous webs from synthetic fibres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425126A (en) 1979-12-28 1984-01-10 Johnson & Johnson Baby Products Company Fibrous material and method of making the same using thermoplastic synthetic wood pulp fibers
US4392861A (en) * 1980-10-14 1983-07-12 Johnson & Johnson Baby Products Company Two-ply fibrous facing material

Also Published As

Publication number Publication date
DE1218871B (de) 1966-06-08
BE614510A (fr) 1962-06-18
CH386234A (de) 1964-12-31
NL125598C (en, 2012)
GB958430A (en) 1964-05-21
NL275735A (en, 2012)
LU41352A1 (en, 2012) 1962-05-09

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