US3698355A - Apparatus for coating and/or impregnating a sheet material - Google Patents

Apparatus for coating and/or impregnating a sheet material Download PDF

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Publication number
US3698355A
US3698355A US877140A US3698355DA US3698355A US 3698355 A US3698355 A US 3698355A US 877140 A US877140 A US 877140A US 3698355D A US3698355D A US 3698355DA US 3698355 A US3698355 A US 3698355A
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United States
Prior art keywords
sheet material
channel
coating
impregnating
slit
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Expired - Lifetime
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US877140A
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English (en)
Inventor
James W I Heijnis
Joseph T V M Geusgens
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Aku NV
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Aku NV
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    • 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
    • D04H1/655—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 characterised by the apparatus for applying bonding agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/08—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating from outlets being in, or almost in, contact with the textile material

Definitions

  • the size of the feed openings may be adjusted to vary the distribution of the coating and/or [56] References cued impregnating agent, and the contour of the slit-shaped UNITED STATES PATENTS channel may be adjusted e.g., to vary the pressure build-up within the channel. 346,869 8/1886 Sherck & Batrg ..118/411 2,784,697 3/1957 Uhleen ..118/411 2 Claims, 3 Drawing Figures APPARATUS FOR COATING AND/OR IMPREGNATING A SHEET MATERIAL
  • the present invention relates to an apparatus for coating and/or impregnating a sheet material.
  • the sheet material is passed through a slit-shaped channel of a metering device in which a liquid coating and/or impregnating agent is supplied through one or more feed openings in the walls of the channel to one or both sides of the sheet material.
  • This general coating device of forming laminated or impregnated articles is known in the prior art, for example, Swiss Patent Specification No. 381,851.
  • two or more layers of a sheet material can be coated and/or impregnated on both sides and then the layers are pressed against each other.
  • each layer of sheet material is passed through a slit shaped channel having a passage of constant height in which the coating and/or impregnating agent is applied to the layer.
  • the liquid treating agent is supplied to the layers from openings in the channel walls with these openings being connected to a supply channel for the treating agent.
  • This known method has the disadvantage that the distribution of the amount of treating agent across the width of the sheet material cannot be varied to compensate for fluctuations in the local take-up of the treating agent into the sheet material.
  • the take-up of the treating agent may vary appreciably across the width of the sheet material, for example, in the case where the sheet material exhibits differential density across its width.
  • the total amount of coating or impregnating agent to be applied can be controlled only by changing the supply pressure at the beginning of the feed channel which communicates with the feed openings.
  • the prior art device is not adaptable to obtain special effects by applying in predetermined manner to localized areas of the sheet material an increased amount of coating or impregnat ing agent.
  • the amount of treating agent for coating and/or impregnating the sheet material may be adjusted by varying the size of the feed openings leading to the channel through which the sheet material passes for the purpose of either varying the total amount of treating agent supplied and/or the distribution of the treating agent across the width of the sheet material.
  • the pressure drop across the feed openings is at least 0.1 kg/cm and preferably from 1 to 2 kg/cm".
  • the sheet material used in the practice of the invention preferably is formed of a sheet which substantially consists of threads or a fiber mass.
  • the sheets may be composed of continuous filaments or fibers of threadforming polymers such as polyamides such as nylon, polyesters such as polyethylene terephthalate, polyvinyl compound such as polyvinyl chloride, polyolefins such as polyethylene and polypropylene, cellulose derivatives, glass fibers, mineral fibers, etc.
  • the treating material is supplied to both sides of the sheet material
  • This method is of particular importance if coating or impregnating agents with different properties are used on opposite sides of the sheet material. This may be the case if the two sides of the final product are intended to have different functions.
  • this method permits the choice of having on the sides of the sheet material different adjustments of both the amounts and outflow resistances of the treating agent. This is of particular importance where different treating agents are used, or when it is envisaged to influence the depth of penetration of the treating agent into the sheet material.
  • the serviceability of the product is determined by mechanical properties, for instance, its flexibility. These properties may be influenced by the depth of penetration of the treating agent.
  • the coating or impregnating agent is fed through slotted feed openings which extend across the entire width of the sheet material.
  • the shape of the slotted feed openings which may be adjusted is capable of ensuring a substantially uniform distribution of the treating agent across the width of the sheet material.
  • the feed opening slots extend in the transverse direction of the metering channel preferably with the adjustable slots in the channel walls positioned exactly opposite each other, and with. means for independently adjusting the opening of each slot, for example, by adjustable bolts which may exert a push or pull on elastically deformable wall portions.
  • the metering device of the invention is provided with means for adjusting the sectional area of the slit-shaped channel in which the sheet material is coated or impregnated.
  • the walls of the channel may be caused to take positions substantially parallel, converging or diverging with respect to each other.
  • This aspect of the invention is of particular importance because it enables an adjustment of the pressure build-up within the coating or impregnating channel. When the walls of the channel converge in the direction of travel of the sheet material, the sheet material is subjected to a rapid increase in pressure just as it enters the zone of the feed slots.
  • Air entrapped in the sheet material is driven out before the liquid treating agent which flows through the adjustable slots reaches and penetrates the sheet material in order to ensure uniform penetration across the width of the sheet material.
  • the air can escape in a direction pposite to the feed direction of the sheet material.
  • the treating agent is supplied to only one side of the slit-shaped channel.
  • the members for adjusting the sectional area of the channel may be provided on the opposite side of the channel and distributed across its width to cause elastic deformation of this wall of the channel so that the shape of the channel may as much as possible be adapted to the cross sectional shape of the sheet material.
  • the desired distribution pattern of the treating agent from its feed slot which extends across the width of the channel is maintained as much as possible while the treating agent is taken up by the sheet material. Consequently, the ratio of the amount of the treating agent to the amount of the sheet material may be maintained nearly constant across the entire width of the sheet material.
  • FIG. 1 is an elevational view partly in section of one embodiment of the present invention.
  • FIG. 2 is a partial plan view of the embodiment of FIG. 1.
  • FIG. 3 is an elevational view partly in section of another embodiment of the invention in which the treating agent is supplied to only one side of the sheet material and in which the shape of the sectional area of the slit-shaped channel is adjustable across its width.
  • reference numeral 1 designates a slit-shaped channel through which the sheet material to be treated is passed downwardly in the direction indicated by the arrow.
  • an impregnating agent is supplied to both sides of the sheet material via slots 2 and 3 in opposite sides of the channel.
  • the slots 2 and 3 extend across the full width of the walls of the slitshaped channel 1 with the slots being bounded by lower slit walls 4 and 5 and upper slit walls 6 and 7.
  • the walls 4 and 6 which bound slot 2 are separate parts which are clamped together by bolts 8. However, it is not necessary that these walls be separate parts, and the same may be said for the walls 5 and 7 which bound the slot 3.
  • the direction of flow of the impregnating agent from slots 2 and 3 is at right angles to the longitudinal direction of the channel 1, this is not essential.
  • the longitudinal axes of the slots and the inlet portions of the metering channel may be at an acute angle to each other.
  • Each end of the slot 2 is bounded by a flat plate 9 which is pressed against the side faces of the wall parts 4 and 6 by means not shown to form a hermetic seal.
  • each end of the slot 3 is bounded by flat plates 10 which are pressed against the side faces of the wall parts 5 and 7 to form a hermetic seal.
  • An impregnating agent is fed to the slot 2 from a channel 1 1 which is bounded by the slit wall parts 4 and 6 and the two plates 9, with the impregnating agent being fed to the channel through an inlet from a suitable source which is not shown.
  • the wall parts 4 and 6 and the two end plates 9 constitute an integral unit which is pivot-mounted in supports 20.
  • the supports may be accurately displaced relative to a stationary frame 13 for the purpose of adjusting the width 24 of the channel 1.
  • Adjustment of the height of slot 2 is achieved by bolts 15 which have a fine screw thread to enable close adjustment.
  • a bolt 16 is fixedly screwed in the wall part 5 of the slit wall so that by turning the nut 17 on bolt 16 the wall parts 4 and 6 which define the slot 2 are moved either nearer together or farther apart.
  • the elasticity of the wall parts 4 and 6 is chosen so that over the set height of the slot 2 the wall parts 4 and 6 will not be subject to plastic deformation.
  • Adjustment of the height of slot 2 is carried out by first turning the bolt 15 to a setting constituting the chosen height which can be read by means of a pointer 18 and a scale 19, followed by turning the nut 17 to adjust the distance between the wall parts 4 and 6 until the bottom of bolt 15 contacts the wall part 4.
  • Adjustment of the height of the slot 3 is effected in the same way.
  • the wall parts 5, 7 and the two end plates 10 similarly constitute an integral unit which is pivot-mounted in supports 21 which are fixedly mounted on the frame 13.
  • the ends of the wall parts 4 and 5 adjacent the discharge end of channel 1 be bevelled to an acute angle 39.
  • the angle 39 should preferably be from 45 to 60 and serves to prevent the impregnating agent being left at the ends of the channel where it could decompose or repenetrate into the channel.
  • Heat exchange jackets 25 and 26 are provided to keep the wall parts 4 7 at the desired temperature.
  • FIG. 3 illustrates another embodiment of the present invention in which impregnating agent is fed to only one side of the sheet material via a slot 2.
  • the other side of the channel 1 is constituted by a wall 27 which is elastically deformable across the width of the channel 1.
  • a number of draw bolts 28 are distributed over the of the nuts 31 and the bolts 28, the wall 27 is drawn into contact with the ends of the set screws 29.
  • the elastic deformation of the wall 27 allows a flowing sectional I shape of the channel to be achieved.
  • a heat exchange medium may be passed through bores 35 in the wall 27.
  • Apparatus for applying a fluid treating material to a sheet material comprising a plurality of wall parts defining a split-shaped channel through which the sheet material is passed, at least one of said wall parts being provided with at least one feed opening through which the fluid material for treating said sheet material is fed, said feed opening being in the form of a slot which extends in a direction transverse to the travel of the sheet material and being formed between one of two wall portions which is elastically deformable and a plurality of independent adjustable bolts engaging said deforma ble wall portion to permit deformation thereof for 10- cally adjusting the slot along its length.
  • An apparatus for coating and/or impregnating a sheet material such as webs of filaments or fibers whichapparatus has a slit-shaped channel through which the sheet material may be passed,
  • one or two channel walls being provided with a slotted feed opening through which a treating agent may be supplied, characterized in that along the slit-shaped channel there are provided several independently adjustable means for locally varying the free outlet area of the passage of a feed slot, said adjustable means consisting of independently acting nuts which are screwed on bolts for causing a pull or push to be exerted on elastically deformable slot walls.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Coating Apparatus (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US877140A 1968-11-29 1969-11-17 Apparatus for coating and/or impregnating a sheet material Expired - Lifetime US3698355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6817090A NL6817090A (enExample) 1968-11-29 1968-11-29

Publications (1)

Publication Number Publication Date
US3698355A true US3698355A (en) 1972-10-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US877140A Expired - Lifetime US3698355A (en) 1968-11-29 1969-11-17 Apparatus for coating and/or impregnating a sheet material

Country Status (7)

Country Link
US (1) US3698355A (enExample)
CH (1) CH522448A (enExample)
DE (1) DE1957166A1 (enExample)
ES (1) ES374015A1 (enExample)
FR (1) FR2024561A1 (enExample)
GB (1) GB1259544A (enExample)
NL (1) NL6817090A (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899999A (en) * 1972-06-13 1975-08-19 Escher Wyss Gmbh Blade for applying a flowable substance to a moving article
US3919974A (en) * 1973-11-09 1975-11-18 Bolton Emerson Hot melt extrusion apparatus
US3968271A (en) * 1971-12-20 1976-07-06 Xerox Corporation Coating apparatus and uses thereof
US5240067A (en) * 1992-01-08 1993-08-31 Reynolds Metals Company Method and apparatus for continuous molten material cladding of extruded products
US5538754A (en) * 1991-03-26 1996-07-23 Shipley Company Inc. Process for applying fluid on discrete substrates
US5807434A (en) * 1993-05-27 1998-09-15 Alcan International Limited Apparatus for two-sided coating of elongated strip articles
US20040074442A1 (en) * 2001-04-12 2004-04-22 Eckart Krageloh Application device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603109A1 (de) * 1986-02-01 1987-08-06 Dischler Helmut Hydraulische handpumpe zum betaetigen von kabelschuhpressen und anderen hydraulischen werkzeugen
DE19838687C2 (de) * 1998-08-26 2001-05-31 Kuesters Eduard Maschf Vorrichtung zum Auftragen eines Bemusterungsmittels auf eine Bahn

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968271A (en) * 1971-12-20 1976-07-06 Xerox Corporation Coating apparatus and uses thereof
US3899999A (en) * 1972-06-13 1975-08-19 Escher Wyss Gmbh Blade for applying a flowable substance to a moving article
US3919974A (en) * 1973-11-09 1975-11-18 Bolton Emerson Hot melt extrusion apparatus
US5538754A (en) * 1991-03-26 1996-07-23 Shipley Company Inc. Process for applying fluid on discrete substrates
US5240067A (en) * 1992-01-08 1993-08-31 Reynolds Metals Company Method and apparatus for continuous molten material cladding of extruded products
WO1994023844A1 (en) * 1992-01-08 1994-10-27 Reynolds Metals Company Method and apparatus for continuous molten material cladding of extruded products
US5807434A (en) * 1993-05-27 1998-09-15 Alcan International Limited Apparatus for two-sided coating of elongated strip articles
US20040074442A1 (en) * 2001-04-12 2004-04-22 Eckart Krageloh Application device
US6902621B2 (en) * 2001-04-12 2005-06-07 Voith Paper Patent Gmbh Application device
US7279043B2 (en) 2001-04-12 2007-10-09 Voith Paper Patent Gmbh Application device

Also Published As

Publication number Publication date
CH522448A (de) 1972-05-15
ES374015A1 (es) 1972-02-16
DE1957166A1 (de) 1970-06-11
GB1259544A (enExample) 1972-01-05
NL6817090A (enExample) 1970-06-02
FR2024561A1 (enExample) 1970-08-28

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