US2934453A - Process for producing wrapping material and casting molds - Google Patents

Process for producing wrapping material and casting molds Download PDF

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Publication number
US2934453A
US2934453A US624488A US62448856A US2934453A US 2934453 A US2934453 A US 2934453A US 624488 A US624488 A US 624488A US 62448856 A US62448856 A US 62448856A US 2934453 A US2934453 A US 2934453A
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US
United States
Prior art keywords
paper
layer
bitumen
water
alginate
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
US624488A
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English (en)
Inventor
Alsfeld Max
Dierichs Wolfgang
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Application granted granted Critical
Publication of US2934453A publication Critical patent/US2934453A/en
Anticipated expiration legal-status Critical
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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
    • Y10T156/1142—Changing dimension during delaminating [e.g., crushing, expanding, warping, etc.]
    • Y10T156/1147—Using shrinking or swelling agent during delaminating
    • 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]
    • Y10T428/31815—Of bituminous or tarry residue
    • Y10T428/31819—Next to cellulosic
    • Y10T428/31823—Paper
    • 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]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y10T428/31899—Addition polymer of hydrocarbon[s] only
    • Y10T428/31902—Monoethylenically unsaturated

Definitions

  • a blockof bitumen may be obtained, for instance by cutting open the sack and removing it without the bitumen adhering thereto.
  • bitumens and similar masses may be filled into cardboard drums, paper bags and similar wrapping materials, without incurring the above mentioned ditiiculties, when the wrapping materials are, provided, in addition to a layer of swollen alginic acid .at the surface facing the goods, with another layer separated therefrom by paper or paper-like material, facing away from the goods, said last mentioned layer being of negligible permeability for water and steam.
  • the process according to the invention is therefore characterized by providing on paper or the like material, on the one hand a swollen but waterinsoluble layer of alginic acid or its derivatives and separated from that layer by the paper a layer of a material of negligible'permeability for water and steam.
  • the new process may likewise be used to great advantage in making molds for casting synthetics, such as phenol resins, polyester resins, epoxy resins and the like.
  • the molds are made of paper or the like,- and are lined with a layer of paper impregnated according to the above process. In the mold, the alginate layer should be the one coming into contact with the material to be cast.
  • the layer of negligible permeability for water and steam may consist of diiferent materials as long as they fl ti [S a ts v i' t 'ticularly economical when paper bags are used.
  • bitumen may be applied with good success. This mode of operation is par- When bitumen is used as coating layer, it should only be con sidered that bitumen sometimes migrates in paper, and the usefulness of paper bags would thereby be impaired. It is therefore advisable to use paper bags, impregnated with a bitumen layer, only in such cases when a storage of the empty .bags is not intended for any considerable length of time.
  • the application of a swollen water-insoluble layer of alginic acid or its derivatives on paper or paper-like material may occur in several ways, which are generally known.
  • the best known operating method consists in treating the paper with a water-soluble compound of alginic acid and converting the impregnating or coating layer into an insoluble derivative, by a subsequent treatment.
  • Water-soluble compounds are, particularly, the alkali metal salts and ammonium salts, of alginic acid. Conversion into an insoluble derivative can be efiected by solutions containing earth alkali or heavy metal salts. We may name the salts, e.g.
  • hygroscopic salts such as calcium chloride. If non-hygroscopic salts are used, it is advisable for the production of a swollen alginate layer, to add to the alginate solution such hygroscopic substances as glycerol, glycol, and the like. pregnating or coating layers into insoluble derivatives of alginic acid by subsequent treatment with dissolved or gaseous acids.
  • meme f acture of paper bags A particular use of the process according to the invention which is of economical importance, is the meme f acture of paper bags.
  • strong paper may be coated on one side with a water impermeable layer such as polyethylene. This can be efiected for instance by treatment with a suitable dispersion or solualginate is obtained at the inner paper surface. After th'e'excess 'calcium'chlorid solution has drainedoff,tlie
  • bag may be filled with ,a liquid bituminous mass melted
  • Example 2 A cardboard drum of about 10 liters capacity, coated on the outside with impermeable polyvinylidene (thickof layer 30 g./sq. m., water permeability 1 g./sq. m.
  • the materials obtained by one of the above mentioned or similar processes is then made into sacks. This is done by using one or more sheets of paper, some of which may have impermeable coatings and others without such coatings. It is necessary that the surface however,
  • a paper-bag thus impregnated, can be filled with pitch, bitumen, or fatty acids which are solid at room temperature, or similar materials without their permeating the bag even in hot molten state. After cooling and solidifying of the mass, the paper bag can be cut open and removed without any material adhering thereto, though the wrapping is used for sticky masses such as bitumen or pitch.
  • Example 1 p utism ntil an cgatiuue s swollen film of calcium lowed to stand for .a few minutes.
  • Example 3 A paper web of ordinary kraft paper weighing 90 g., coated on one side with a mixture of polyethyleneparafiin (thickness of layer 30 g./sq. m.,'permeability for water 2 g./sq. m. in 24 hours). is soaked or'sprayed at the other side with 20% calcium chloride solution, until the paper is evenly moistened. From the paper thus pre-treatcd, a multi-layer paper sack is -made, care being taken that the side impregnated with the calcium chloride solution will be. the inner side of the sack.
  • the paper Before hot bitumen isfilled into the sack, the latter is sprayed with a 1-2% sodium alginate solution and al- After excess, unprecipitated alginate solution has dripped otf, molten bitumen of 120 C. is filled in. After cooling, the paper can be torn oll and removed from block without Sticking.
  • bitumetnthis bag used for making a multiple-layer paper bag with the free (uncoated) side'facing the goods to be wrapped.
  • bitumetnthis bag Before filling in a hot molten'mass of bitumetnthis bag was treated at the inside with a 1% aqueous solution of sodium alginate and after a few minutes, with a' 30% aqueous solution of calcium chloride. After cooling the contents, the paper bag could be removed without sticking to the bituminous mass.
  • Example 5 A sack made according to Example 1 is filled with about 500 cc; of a casting resin of epoxy-polyester base together with a conventional amine hardener. After the reaction has set in, which will take a few minutes, the contents warm up to 6080 C. The resin will be completely hardened after 5-6 hours. The wrapping can then be removed without sticking to the hardened resin.
  • casting molds may likewise be made which are lined at the inside with a paper having an inside coating of a swollen alginate film and an outside layer which is likewise impermeable.
  • Casting resins may be poured so as'td'form plane articles, when, as 'a'supporting base, paper prepared according tothe invention is used. After hardening, the resin plates can easily be removed from the paper.
  • paper-like material is intended to include wrapping paper of any kind and cardboard or pasteboard generally used in wrapping and shipping articles, and for similar purposes.
  • a wrapping material being non-adhering to sticky masses, which consists of paper which has been coated, on the side facing said sticky masses, with a swollen water-insoluble layer of a substance selected from the group consisting of alginic acid and an alginate, and on the other side with a water-impermeable substance selected from the group consisting of polyethylene and bitumen.
  • a casting mold being non-adhering to sticky masses

Landscapes

  • Laminated Bodies (AREA)
  • Paper (AREA)
US624488A 1955-11-30 1956-11-27 Process for producing wrapping material and casting molds Expired - Lifetime US2934453A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH25635A DE1013506B (de) 1955-11-30 1955-11-30 Verfahren zur Herstellung von mit Alginsaeure oder Verbindungen der Alginsaeure behandeltem Papier oder papieraehnlichen Stoffen fuer Verpackungszwecke sowie zur Auskleidung von Giessformen

Publications (1)

Publication Number Publication Date
US2934453A true US2934453A (en) 1960-04-26

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US624488A Expired - Lifetime US2934453A (en) 1955-11-30 1956-11-27 Process for producing wrapping material and casting molds

Country Status (7)

Country Link
US (1) US2934453A (de)
BE (1) BE551719A (de)
CH (1) CH351829A (de)
DE (1) DE1013506B (de)
FR (1) FR1189883A (de)
GB (1) GB821930A (de)
NL (1) NL212406A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085919A1 (de) * 1982-02-10 1983-08-17 Ab Tetra Pak Verfahren zur Herstellung eines Verpackungsmaterials mit guten Gasdichtigkeitseigenschaften
US8113416B2 (en) 2009-05-21 2012-02-14 Meadwestvaco Corporation Hermetically sealed paperboard container with enhanced barrier performance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218145B (de) * 1961-11-23 1966-06-02 Aga Ab Anwendung einer Polyester-Folie oder Polyaethylen-Folie als Zwischenlage beim Vulkanisieren einer in Kautschuk eingebetteten, zu einer Rolle aufgewickelten Gewebebahn

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290633A (en) * 1940-09-18 1942-07-21 Kelco Co Coated paper and paper products
US2513416A (en) * 1944-08-02 1950-07-04 Algin Corp Alginous gum product and the manufacture thereof
US2599130A (en) * 1949-09-19 1952-06-03 Marathon Corp Laminated sheet material
US2648487A (en) * 1947-07-25 1953-08-11 St Regis Paper Co Bag for packaging tacky polymeric materials
US2723923A (en) * 1947-10-02 1955-11-15 Munters Carl Georg Method of impregnating multilayer paper insulation
US2758100A (en) * 1952-01-02 1956-08-07 Exxon Research Engineering Co Dairy wax composition

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290633A (en) * 1940-09-18 1942-07-21 Kelco Co Coated paper and paper products
US2513416A (en) * 1944-08-02 1950-07-04 Algin Corp Alginous gum product and the manufacture thereof
US2648487A (en) * 1947-07-25 1953-08-11 St Regis Paper Co Bag for packaging tacky polymeric materials
US2723923A (en) * 1947-10-02 1955-11-15 Munters Carl Georg Method of impregnating multilayer paper insulation
US2599130A (en) * 1949-09-19 1952-06-03 Marathon Corp Laminated sheet material
US2758100A (en) * 1952-01-02 1956-08-07 Exxon Research Engineering Co Dairy wax composition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085919A1 (de) * 1982-02-10 1983-08-17 Ab Tetra Pak Verfahren zur Herstellung eines Verpackungsmaterials mit guten Gasdichtigkeitseigenschaften
US8113416B2 (en) 2009-05-21 2012-02-14 Meadwestvaco Corporation Hermetically sealed paperboard container with enhanced barrier performance
US20120104078A1 (en) * 2009-05-21 2012-05-03 Zhiquan Yan Hermetically Sealed Paperboard Container with Enhanced Barrier Performance
US8448844B2 (en) * 2009-05-21 2013-05-28 Meadwestvaco Corporation Hermetically sealed paperboard container with enhanced barrier performance

Also Published As

Publication number Publication date
BE551719A (de) 1956-10-31
DE1013506B (de) 1957-08-08
NL212406A (de) 1900-01-01
GB821930A (en) 1959-10-14
FR1189883A (fr) 1959-10-07
CH351829A (de) 1961-01-31

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