US2665450A - Method and apparatus for continuous production of absorbing material - Google Patents

Method and apparatus for continuous production of absorbing material Download PDF

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Publication number
US2665450A
US2665450A US152092A US15209250A US2665450A US 2665450 A US2665450 A US 2665450A US 152092 A US152092 A US 152092A US 15209250 A US15209250 A US 15209250A US 2665450 A US2665450 A US 2665450A
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US
United States
Prior art keywords
belt
sheet
fibers
sponge
bath
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
US152092A
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English (en)
Inventor
Lindquist Curt Axel John
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.)
Celloplast AB
Original Assignee
Celloplast AB
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
Application filed by Celloplast AB filed Critical Celloplast AB
Application granted granted Critical
Publication of US2665450A publication Critical patent/US2665450A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/425—Porous materials, e.g. foams or sponges
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/61—Processes of molding polyamide

Definitions

  • Artificial sponge material is commonly made by the intimate mixture of a pore-forming substance, such as sodium sulphate decahydrate or Glaubers salt with viscose, followed by coagulation and the customary after treatments, the sponge material frequently being molded into the desired final form.
  • the salt dissolves and incidentally coagulates the adjacent viscose, thereby forming cavities or pores in the body of the material.
  • cotton or hemp fibers are commonly added to the intimate mixture without any control as to their directional dispositions and consequently the fibers lie in all directions. If a block of such sponge material is cut into thin sheets or layers a sponge cloth is obtained.
  • the fibers in a cloth produced in this manner are not oriented in the plane of the cloth only, the strength is not so high as would be the case if the longitudinal disposition of the fiber was confined to the plane of the cloth.
  • the intimate mixture of viscose, Glaubers salt and fibers is deposited upon a traveling belt and is spread out evenly and is subjected to both transverse and longitudinal surfac rubbing or 2 agitation which tends to orient the fibers in those respective directions.
  • the sponge cloth In order to make the sponge cloth more pliable and supple, it may have a surface pattern imparted to it by providing the belt with a complementary pattern. If it is desired to form a pattern on the upper sides of the cloth, this may be done by subjecting that surface to pressure by a mold device such as a roller having the desired surface design, in advance of the coagulation. Either or both of such patterning procedures may be used on the traveling web.
  • the invention contemplates an endless belt of a material resistant to the chemicals in the viscose solution and in the coagulating bath and an extrusion press such as a screw conveyor for discharging the mass upon the belt, with means to drive the belt and to direct it into and out of a coagulating bath.
  • an extrusion press such as a screw conveyor for discharging the mass upon the belt, with means to drive the belt and to direct it into and out of a coagulating bath.
  • a spreader is laterally reciprocated over the belt at, the proper distance therefrom and in a positionafter the extrusion press.
  • a surface contacting device having continuous relative movement in the direction of travel of the web.
  • A-cceptably such a device may be a roller properly spaced from the belt and rotating at a peripheral speed exceeding the speed of the belt and in the same direction as the belt.
  • the mass now follows the belt and the fibers of the mass will preferably become oriented in the transverse direction, for which reason the web of mass, if not further mechanicallyttreated,would position so as to be oriented in the longitudinal direction.
  • any desired number of fibers can be directed parallel with the longitudinal direction of the belt,
  • the belt 2 then conducts the, mass intca ,coagu: lation bath 5, which simply may consist oiiaillot (i. e. heated to about the boiling point) solution of sodium sulphate. Quripg its passage. throirgh the bath the mass coagulates, and after having passed a roller 6 in the bath, the spongle cloth now formed is continuously drawn on:- iromthe. belt 2 at a roller 1 outside the, coagulation bath. The cloth 3 thus obtainedis thensubjected. to. further chemicaltreal ment, i. e.,des111phurising, bleaching and so on, and is dried Before new mass can be, discharged on the rubber belt 2, said belt should be. cooled and brushed clean, which isdone ina v bath 8, consisting oi cool water and possibly containing cer:
  • Thebrushing is preferably carried out with, brushes til operating in the cooling bath.
  • an incidentat advantage of forming the sheet. on. the-conveyor belt is that the belt forms. a reinforcing support for the nascent sheet through the hot liquor until the coagulation is eiE -ected and thus.makes.possible the continuous sheet formationat high operating speed with minimum likelihoodofrupture.
  • the belt is guided over a roller after the. sep-.
  • the method of producing a ,continupussheet of absorbing material consisting; in depositing. an intimate mixture of viscose, salt crystals and fibersin a continuous-stream on an endlesstraveling belt, subjecting the deposited material on the, belt to a surface rubbing action ina certain direction in the plane of the belt sufiicient to orient a substantial portion of the fibers in the i ect e i ub n subjectin h p sited material on the belt to a, second surface rubbing in a direction at a substantial angle to the first rubbing sufiicient to orient a substantial portion of the fibers in the last mentioned direction conveying the Web qnthe belt after the rubbing treatmentthrougha coagulating bath, and then separating the. sheet so formed from the belt.
  • the method oi producing a continuous sheet ofabsorbing material consisting in depositing an intimate mixture oi viscose, salt crystals and fibers in a continuous stream on an endless traveli-ng belt, subjecting the deposited mixture to a laterally reciprocatory spreading action, thereby orienting some of the fibers in a transverse direction, conveying the mixture on the belt following such action through a coagulating bath, and then separating the sheet so formed from the belt.
  • a rotatable roller disposed transversely over the, belt between the spreader andcoagulating bath in position toengage a sheet.
  • An apparatus iorproducing a continuous. sheet oi absorbing material comprising a driven endless belt, a coagulating bath, a cooling bath, meansto. guide the belt successively through said baths, means for depositing a continuous stream;
  • transversely reciprocatoryspreading means adjacent the. material depositingmeans and disposed over andspaced from the beltby-thethick-nessof thesheet to be formed, a rotatable roller disposed; transversely over the belt between the. spreader: and coagulating bath in position to engage a sheet of the material and means capable of rotating the roller in the direction of movement of the belt at a peripheral speed exceeding the speed of the belt.
  • the method of producing a continuous sheet of absorbing material consisting in depositing an intimate mixture of viscose, salt crystals and fibers in a continuous stream on an endlesss traveling belt, subjecting the deposited mixture on the belt to a laterally reciprocatory spreading action to orient some of the fibers in a transverse direction, conveying the mixture on the belt after such spreading through a coagulating bath and separating the sheet so formed from the belt.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Epidemiology (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Treatment Of Fiber Materials (AREA)
US152092A 1949-12-12 1950-03-27 Method and apparatus for continuous production of absorbing material Expired - Lifetime US2665450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2665450X 1949-12-12

Publications (1)

Publication Number Publication Date
US2665450A true US2665450A (en) 1954-01-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US152092A Expired - Lifetime US2665450A (en) 1949-12-12 1950-03-27 Method and apparatus for continuous production of absorbing material

Country Status (2)

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US (1) US2665450A (fi)
NL (1) NL74659C (fi)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712154A (en) * 1952-04-23 1955-07-05 Celloplast Ab Apparatus for continuous production of artificial sponge cloth
US2827661A (en) * 1955-04-26 1958-03-25 Kohorn Ralph S Von Apparatus for the production of artificial cellulose sponge
US2907109A (en) * 1956-02-13 1959-10-06 Palmer John Richard Cheese forming apparatus
US3032815A (en) * 1956-08-14 1962-05-08 Braunschweiger Farbenwerke Wil Process and apparatus for manufacturing sheets from polymerizable substantially solvent-free casting resins
US3109703A (en) * 1961-02-06 1963-11-05 Nylonge Corp Method for the production of cleaning devices
US3524753A (en) * 1963-11-25 1970-08-18 Porvair Ltd Method of making a microporous film
US3991149A (en) * 1974-10-03 1976-11-09 Steven Hurwitt Method for controlling the thickness of ceramic tape
US20020093611A1 (en) * 2001-01-10 2002-07-18 Lazarev Pavel I. Device and method for forming anisotropic films

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1590999A (en) * 1922-06-16 1926-06-29 Czapek Emil Process for manufacturing foils
GB435128A (en) * 1933-03-17 1935-09-16 Ig Farbenindustrie Ag Manufacture of articles by using viscose-sponge masses
US2289713A (en) * 1938-10-05 1942-07-14 Polaroid Corp Light polarizer and process of manufacture
US2308951A (en) * 1939-03-28 1943-01-19 Firestone Tire & Rubber Co Continuous manufacture of rubber sheeting
US2336944A (en) * 1940-06-25 1943-12-14 Dunlop Rubber Co Manufacture of rubber sheeting
US2540906A (en) * 1947-06-05 1951-02-06 Burgess Cellulose Company Artificial chamois skin and method of making the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1590999A (en) * 1922-06-16 1926-06-29 Czapek Emil Process for manufacturing foils
GB435128A (en) * 1933-03-17 1935-09-16 Ig Farbenindustrie Ag Manufacture of articles by using viscose-sponge masses
US2289713A (en) * 1938-10-05 1942-07-14 Polaroid Corp Light polarizer and process of manufacture
US2308951A (en) * 1939-03-28 1943-01-19 Firestone Tire & Rubber Co Continuous manufacture of rubber sheeting
US2336944A (en) * 1940-06-25 1943-12-14 Dunlop Rubber Co Manufacture of rubber sheeting
US2540906A (en) * 1947-06-05 1951-02-06 Burgess Cellulose Company Artificial chamois skin and method of making the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712154A (en) * 1952-04-23 1955-07-05 Celloplast Ab Apparatus for continuous production of artificial sponge cloth
US2827661A (en) * 1955-04-26 1958-03-25 Kohorn Ralph S Von Apparatus for the production of artificial cellulose sponge
US2907109A (en) * 1956-02-13 1959-10-06 Palmer John Richard Cheese forming apparatus
US3032815A (en) * 1956-08-14 1962-05-08 Braunschweiger Farbenwerke Wil Process and apparatus for manufacturing sheets from polymerizable substantially solvent-free casting resins
US3109703A (en) * 1961-02-06 1963-11-05 Nylonge Corp Method for the production of cleaning devices
US3524753A (en) * 1963-11-25 1970-08-18 Porvair Ltd Method of making a microporous film
US3991149A (en) * 1974-10-03 1976-11-09 Steven Hurwitt Method for controlling the thickness of ceramic tape
US20020093611A1 (en) * 2001-01-10 2002-07-18 Lazarev Pavel I. Device and method for forming anisotropic films
US6848897B2 (en) * 2001-01-10 2005-02-01 Optiva, Inc. Device and method for forming anisotropic films

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Publication number Publication date
NL74659C (fi)

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