US3772055A - Method and device for strengthening a non-woven material - Google Patents

Method and device for strengthening a non-woven material Download PDF

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Publication number
US3772055A
US3772055A US00084980A US3772055DA US3772055A US 3772055 A US3772055 A US 3772055A US 00084980 A US00084980 A US 00084980A US 3772055D A US3772055D A US 3772055DA US 3772055 A US3772055 A US 3772055A
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US
United States
Prior art keywords
fleece
stiffening agent
strengthening
web
printed
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
US00084980A
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English (en)
Inventor
L Anselrode
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Stork Amsterdam NV
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Stork Amsterdam NV
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Filing date
Publication date
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Publication of US3772055A publication Critical patent/US3772055A/en
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-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
    • D04H1/58—Non-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
    • D04H1/64—Non-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
    • D04H1/66—Non-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 at spaced points or locations
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

  • the fibres may lie pell mell in a totally arbitrary way or be more or less directed in one direction, as e.g., is the case with a carded fleece, in which the fibres are substantially lengthwise directed.
  • stiffening agents such as pastes, emulsions or solutions like rubber lattices, acrylate emulsions or solutions of e.g. synthetic rubbers etc. which cause the fleece composing fibres to adhere better to each other.
  • the fleeces are in one way or the other impregnated with an emulsion or solution of the stiffening agent, either by spraying, submerging, or rolling etc., whereupon the excess is removed by pressing or exhausting.
  • the invention provides a method according to which the stiffening agent is applied by means of one or more thin-walled cylindrical screen stencils with squeegee, said stencils rotating in the direction of advance of the fleece.
  • stiffening agent can be applied to the fleece according toa pattern; the agent can be printed" as it was into this pattern. It is further possible to control in a very positive way the quantity of stiffening agent, applied on the fleece per unit of surface, by means of the mesh width of the screen stencil and the pressing force of the squeegee. It is possible to print in a simple way the fleece to be strengthened according to a pattern of closed and perforated parts provided on the screen stencils.
  • the fleece is preferably moved vertically downwards during and after application of the stiffening agent and the fleece is for a short time, after the liquid has been applied, not supported, so that due to its own weight a pull is exerted thereon.
  • This method is advantageous in that the stiffening agent with which the fleece is printed according to a particular pattern has the time to penetrate into the fleece from the surface therof, while the pull gives rise to the formation of new junctions between the fibres gliding along each other.
  • the junctions operate as capillaries which, if they contact the stiffening agent, tend to suck up same.
  • the fleece is advanced from between two screen stencils rotating in opposite directions. This is advantageous in that the fleeces are thus printed on both sides with a pattern. If desired the pattern on either side of the fleece may be different whereby special effects can be obtained.
  • the special effect of the application of a vertical drying tunnel in combination with the present method consists in that the reorientation of the junctions between the fibres obtained due to the aforementioned pull can be regulated and varied as a result of a correct adjustment of the vertical current of air in the drying tunnel in relation to the total real weight of the web in the drying tunnel.
  • an adjustable apparent weight of the web is obtained which ensures the reorientation.
  • This reorientation results necessarily in a natural equilibrium, since due to the reorientation the material becomes stronger. For the rest the forced vertically directed current of air can and will be directed up or down, so that the web becomes apparently lighter or heavier, respectively.
  • the invention provides a device wherein the means for applying the agent consist of one or more rotatable thin-walled cylindrical screen stencils with inner squeegee, means being provided to move the fleece past or from between the said stencils.
  • the improvement to that effect of the aforementioned method consists in that one composes the paste such that it does not completely gel when being dried or moderately warmed.
  • a discontinuous pattern of chemicals is provided in this non-strengthened fleece in such a way that after drying or heating not only a sufficient strengthening of the fleece is obtained but moreover a sufficient quantity of binding agent is present in the fibres situated on the surface of the fleece on at least one side thereof, while this agent has the property that in contact with a second material and under a moderate pressure it adheres thereto.
  • a converyor belt 1 advances a web-shaped fleece of non-woven material 2, as far as between two screen cylinders 3 and 4 each provided with a squeegee 5.
  • the material is there printed in the proper way according to the pattern in the surface of the two screen stencils 3, 4.
  • the capillaries in the proximity of the surface of the web will be saturated. Due to this capillary suction force a temporary (enormous) strengthening of the fleece is obtained, whereby a certain pull can be exerted on this fleece.
  • the fleece 2 remains over a particular distance in a condition of increased strength, so that a tensile force corresponding to the own weight of the fleece can be applied thereto.
  • FIG. 2 shows a variant in which a non-strengthened fleece 2 is laid on a smooth conveyor belt 1 guided by sprocket wheels 9.
  • a screen cylinder 11 provided with a squeegee mechanism 12, supported by a counterpressure and turning wheel 10, presses the chemicals required for strengthening purposes on and into the fleece web.
  • Good results can be obtained with a polyvinylchloride plastisol according to the following composition:
  • This printing mass is applied as a pattern of lines intersecting at right angles with intermediate non-printed squares having sides of 3 mm.
  • a nonstrengthened card fleece consisting of rayon fibres of 3.7 denier and a length of fibre of 60 mm and increase in weight of 1 l0 grams per m was obtained.
  • the invention is not limited to the use of polyvinylchloride plastisols. Corresponding products can be obtained with:
  • a method for strengthening a web-shaped fleece of non-woven fibrous material comprising the steps of applying continuously a paste or emulsion containing a stiffening agent to the advancing fleece as a printed pattern by means of one or more thin-walled, cylindrical, screen stencils with squeegee while rotating the stencils in the direction of advance of the fleece, continuously moving the fleece vertically downwards during and after application of the stiffening agent, the fleece is for a short time, after the stiffening agent has been applied, not supported, so that due solely to its own weight a pull is exerted thereon, and thereafter moving the treated unsupported fleece downwards through a drying chamber while unsupported to produce a dried strengthened web of fleece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Coloring (AREA)
US00084980A 1969-10-30 1970-10-29 Method and device for strengthening a non-woven material Expired - Lifetime US3772055A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6916397A NL6916397A (fr) 1969-10-30 1969-10-30
GB5121370 1970-10-28

Publications (1)

Publication Number Publication Date
US3772055A true US3772055A (en) 1973-11-13

Family

ID=26266812

Family Applications (1)

Application Number Title Priority Date Filing Date
US00084980A Expired - Lifetime US3772055A (en) 1969-10-30 1970-10-29 Method and device for strengthening a non-woven material

Country Status (5)

Country Link
US (1) US3772055A (fr)
DE (1) DE2051737A1 (fr)
FR (1) FR2065594B3 (fr)
GB (1) GB1335390A (fr)
NL (1) NL6916397A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5164240A (en) * 1990-03-09 1992-11-17 Phillips Petroleum Company Composite product for one-piece shoe counters
US5849647A (en) * 1993-01-29 1998-12-15 James River Hydrophilic cotton lap and products made from it

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA755083B (en) * 1974-08-14 1976-07-28 Stotz & Co Ag A method and apparatus for the manufacture of a laminar sheet

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276181A (en) * 1939-06-30 1942-03-10 Velveray Corp Fabric printing procedure
US2419695A (en) * 1944-10-26 1947-04-29 Mohawk Carpet Mills Inc Machine for stencilling fabric with suction
US2698574A (en) * 1951-07-11 1955-01-04 Visking Corp Apparatus for bonding nonwoven webs
US2843004A (en) * 1953-11-27 1958-07-15 Pajes Wolf Szmul Method of applying indicia to transparencies and method of and apparatus for projecting images of said indexed transparencies upon a screen in reflected light
US2896335A (en) * 1955-07-28 1959-07-28 Dungler Julien Drying of fabrics, papers, cardboards, and other lengthy materials
US2906201A (en) * 1951-09-13 1959-09-29 Velveray Corp Cylindrical screen printing system
US3181250A (en) * 1960-10-01 1965-05-04 Vits G M B H Maschf Apparatus and method of drying web material by directing hollow gas jet streams against opposite faces of the web
US3360393A (en) * 1964-04-30 1967-12-26 Kimberly Clark Co Method of making cockled paper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276181A (en) * 1939-06-30 1942-03-10 Velveray Corp Fabric printing procedure
US2419695A (en) * 1944-10-26 1947-04-29 Mohawk Carpet Mills Inc Machine for stencilling fabric with suction
US2698574A (en) * 1951-07-11 1955-01-04 Visking Corp Apparatus for bonding nonwoven webs
US2906201A (en) * 1951-09-13 1959-09-29 Velveray Corp Cylindrical screen printing system
US2843004A (en) * 1953-11-27 1958-07-15 Pajes Wolf Szmul Method of applying indicia to transparencies and method of and apparatus for projecting images of said indexed transparencies upon a screen in reflected light
US2896335A (en) * 1955-07-28 1959-07-28 Dungler Julien Drying of fabrics, papers, cardboards, and other lengthy materials
US3181250A (en) * 1960-10-01 1965-05-04 Vits G M B H Maschf Apparatus and method of drying web material by directing hollow gas jet streams against opposite faces of the web
US3360393A (en) * 1964-04-30 1967-12-26 Kimberly Clark Co Method of making cockled paper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5164240A (en) * 1990-03-09 1992-11-17 Phillips Petroleum Company Composite product for one-piece shoe counters
US5849647A (en) * 1993-01-29 1998-12-15 James River Hydrophilic cotton lap and products made from it

Also Published As

Publication number Publication date
GB1335390A (en) 1973-10-24
NL6916397A (fr) 1971-05-04
FR2065594B3 (fr) 1973-06-08
FR2065594A7 (fr) 1971-07-30
DE2051737A1 (de) 1971-05-06

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