US3648882A - Package for highly viscous tacky materials - Google Patents

Package for highly viscous tacky materials Download PDF

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Publication number
US3648882A
US3648882A US15570A US3648882DA US3648882A US 3648882 A US3648882 A US 3648882A US 15570 A US15570 A US 15570A US 3648882D A US3648882D A US 3648882DA US 3648882 A US3648882 A US 3648882A
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United States
Prior art keywords
release agent
packaging container
container
silicone release
silicone
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Expired - Lifetime
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US15570A
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English (en)
Inventor
Marcus H Shelton
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings

Definitions

  • a packaging container for highly viscous low molecular weight tacky polymers comprising a container having at least Hlgglns at al.
  • FIG. 1 is a perspective view of the packaging container constructed in accordance with the teachings of the present invention.
  • FIG. 2 is a vertical cross-sectional view of the securing means taken substantially along the line 2-2 of FIG. 1.
  • FIG. 3 is a perspective view of the bottom member of the inner liner showing the securing slit for the cord.
  • the container of this invention is suitable for use for such tacky polymers as polyisobutylene having a Staudinger molecular weight of 8,000 to 12,000, polybutenes having Staudinger molecular weights of about 3,000 to 6,000, low molecular weight butyl rubbers and halogenated butyl rubbers and like compounds which are normally not pourable at room temperature, but exhibit cold flow at room temperature and are sufficiently tacky to be removed from conventional containers only with difficulty.
  • tacky polymers as polyisobutylene having a Staudinger molecular weight of 8,000 to 12,000, polybutenes having Staudinger molecular weights of about 3,000 to 6,000, low molecular weight butyl rubbers and halogenated butyl rubbers and like compounds which are normally not pourable at room temperature, but exhibit cold flow at room temperature and are sufficiently tacky to be removed from conventional containers only with difficulty.
  • the packaging container comprises a container body supplied with an inserted inner liner substantially longer than said container body, said liner having attached to it a readily removable bottom member.
  • container body any suitable container having vertical side walls and at least one end which can be removed or opened.
  • the container may be in any conventional shape, i.e., cylindrical, box, etc. However, the cylindrical shape is preferred because of stress factors.
  • Illustrative of the container materials which may be used are fiberboard, corrugated boxes, metal drums and the like.
  • the inner liner may be any suitable material capable of withstanding hot packaging conditions without becoming embrittled or being subject to degradation or any substantial softening, i.e., softening to the point of adhering to the polymer being packaged.
  • Various polymeric films have been found to be useful for this purpose. Typical of the types of film which may be used are polyester films and heat stabilized nylon.
  • the polymeric film has a thickness of about 0.5 to about 5 mils; more preferably, about 1 to about 3 mils.
  • a particularly suitable polyester film is the reaction product of ethylene glycol and terephthalic acid which is known to the trade by the duPont trademark Mylar.
  • Heat stabilized nylons are well known and are prepared by specially heat treating a nylon film. Particularly preferred are the nylons prepared from a C monomer, i.e., nylon 6. Illustrative of such heat stabilized nylon films is Allied Chemicals Capran 80, which has the following physical properties: at 72 F., tensile strength of 10,000-l4,000 p.s.i., yield strength of 5,000-8,000 p.s.i., tear strength of 70-100 g., elongation of 400-600 percent, negligible solubility in water, crystalline melting point of 424428 F.; at 300 F., tensile strength of 6,000-7,000 p.s.i., yield strength of 2,500-2,700 p.s.i., and elongation of 400-500 percent.
  • release agents may be used in the practice of this invention.
  • the release agents are silicone fluids having a viscosity of about 10 to about 30,000
  • R and R are selected independently from methyl and hydrogen wherein either R or R is methyl and the other is methyl or hydrogen. Where both R, and R are methyl, the fluids are known as dimethyl silicones or dimethyl siloxanes.
  • the hydrogen attached to the silicon is termed a silanic hydrogen.
  • the silicone fluids of this invention may, if desired, be cured after application to the polymeric film.
  • the fluids may be applied as the neat oil or from a solvent solution.
  • the solvent may be C -C alkanes such as hexane, heptane or 2-ethyl hexane, C to C aromatics such as benzene, toluene or xylene or any of the well-known chlorinated solvents such as methylene chloride or chlorobenzene.
  • the silicone fluid is present in the solvent at about 30 wt.
  • R or R of the silicone fluid is hydrogen, that is a methyl silicone having silanic hydrogens
  • the fluid is moisture curable below 50 C. in the presence of a catalyst such as dibutyl tin dilaurate, or dibutyl tin di-2-ethyl hexoate.
  • a catalyst such as dibutyl tin dilaurate, or dibutyl tin di-2-ethyl hexoate.
  • High temperature cures are accomplished in the presence of catalysts such as zinc octoate.
  • the fluid may be moisture cured by the addition of a silanol and a catalyst such as an organic titanate, e.g., tetraisobutyl titanate and tetra-2-ethylhexyl titanate.
  • a catalyst such as an organic titanate, e.g., tetraisobutyl titanate and tetra-2-ethylhexyl titanate.
  • dimethyl silicones are also available as hydroxy terminated polymers which may be cured in the presence of organic titanates without the addition of silanols to the polymer.
  • dimethyl silicones are Union Carbide and Carbon's L-45 series fluids and General Electric Companys SF 96 series fluids, both products being available in a wide range of viscosities up to about 100,000 cs. at 77 F.
  • silicone fluids having silanic hydrogens are Union Carbide and Carbons L-3l, a silicone fluid having a viscosity of about 35 cs. at 77 F. and Y-4006 fluids and Dow Comings Dow Corning 23 silicone fluid.
  • the Y-4006 and Dow Corning 23 fluids are supplied at 30 wt. neat oil in xylene.
  • hydroxy terminated dimethyl silicones are Union Carbide and Carbons W-900 and Y-1480.
  • the thickness of the release agent coating is not critical. However, it is essential that the coating be continuous. For example, a continuous coating whose thickness is in the angstrom range will suffice, whereas a discontinuous coating of several mils will not release properly.
  • coated release papers are available on the market, such as silicone coated glassine, silicone coated parchment and silicone coated latex treated stock, and are ef fective as release surfaces, they are not generally suited for use in the practice of this invention since they become excessively embrittled by the heat history of hot packaging and can be removed only in small pieces.
  • cellophane is a satisfactory release surface for the purpose of this invention. It is not embrittled by packaging heat history and may be removed from the packaged polymer without the aid of a release agent.
  • the cellophane may be removed from the packaged polymer by wetting with water.
  • the water breaks the bond between the polymer and the cellophane, and the cellophane, having sufficient cohesive strength, is removed in one piece.
  • the cellophane film is about 0.5 to about mils in thickness, more preferably about 1 to about 3 mils.
  • cellophane as used in this specification and claims means films produced from wood pulp by the viscose press, known in the trade as uncoated type cellophanes.
  • cellophane films are the cellophanes known to the trade as type PD, type PUD and type PUD-O cellophanes which are available from E. I. duPont de Nemours and Co.
  • clay coated kraft paper having a basic weight of at least about 30 lbs. per l,000 ft. and preferably at least about 50 lbs. per 1,000 ft. coated with a previously discussed silicone release agent, is a suitable release surface for the purpose of this invention.
  • kraft paper having the same basic weight requirements as above, if coated with finely divided mica is also a suitable release surface.
  • the finely divided mica should have a platelet shape with a thickness of about 20 to about 200 angstroms and about 100 times thickness in diameter.
  • the mica is a synthetic mica Synthetic mica is a fluorine derivative of phlogopite made by treating potassium fluorosilicates with alumina under pressure and heat or by melting basic oxides, fluorides and feldspar together.
  • Illustrative of the synthetic mica coatings which may be used is a product known in the trade by the Minnesota Mining & Manufacturing Co. trademark Burnil" Brand Microplates.
  • Bumil Brand Microplates are extremely thin platelets of synthetic mica. The average particle size is about 20-100 angstroms in thickness and about 100 times thickness in diameter. The platelets have a melting point of 1,800 F., a density of 2.7 g./cc. and a refractive index of 1.5.
  • the readily removable bottom member which in the case of a cylindrical container would be a disc, is constructed so as to have a peripheral groove, as best illustrated in FIG. 2.
  • One simple method of constructing this bottom member is by lamination of two equally shaped pieces of fiberboard in such a fashion that some l 5% inches of the periphery remains unglued. Other similar techniques (e.g., stapling) are equally applicable.
  • This member has its upper side, i.e., the side which will be exposed to the substance to be packed, covered with a sheet of the same material treated in the same fashion as that used for the inner liner. This sheet extends beyond the periphery of the member and is positioned so as to overlap the peripheral groove. The bottom member is then inserted within the inner liner and the sheet and liner secured within the peripheral groove so as to form a receptacle or bag sealed at one end.
  • Securing the liner and bottom may be accomplished by any suitable means; however, the preferable method involves wrapping a cord around the exterior of the liner and tightening so as to draw both the liner and the covering sheet into the groove of the bottom member. The ends of the cord can then be secured in a slit placed in the lower edge of the bottom member (as shown in FIG. 3), thereby allowing ready removal of both the cord and bottom member when desired.
  • the slit should be approximately equal to the thickness of the cord to insure the cord being held in place.
  • the cord should be one capable of withstanding the relatively high temperatures of the substance to be packed without losing its effectiveness. For polymeric materials this would mean having a melting point above this temperature.
  • Some examples of cords useful in this invention are monofilament and braided heavy gauge nylon, polyester, and soft metal wire.
  • the packaging container comprises a cylindrically shaped body 11 having a removable end 12 the interior of which is coated with a silicone release agent, and being equipped with an inner liner of heat stabilized nylon 13 continuously coated with the silicone release agent and extending beyond the container body some 3 or 4 inches, a disc with a peripheral groove inserted in said inner liner 14, said disc having its upper surface covered with a sheet of the coated nylon which extends beyond the disc and overlaps the peripheral crevice 15, and a nylon cord 16 wrapped around the exterior of the liner and tightened to pull both liner and sheet into the peripheral groove. The cord is then secured in a slit 17 in the lower edge of the disc.
  • the container is then filled with the polymer, the extending portion of the inner liner folded over the container body, and the removable end put in place and sealed by means of tape, plastic or metal straps, and the like.
  • a packaging container which comprises:
  • a tubular container body having at least one removable end closure, the interior of said end closure being continuously coated with a release agent;
  • a liner disposed in and substantially longer than said container body, said liner being composed of a material capable of remaining nonembrittled, nondegraded and substantially unsoftened at temperatures equal to those of any substance to be packaged in said container, which material has been continuously coated with a release agent;
  • said member having a peripheral radially outwardly opening groove and having disposed on its upper side and overlying said peripheral groove a sheet of the material set forth in (b), said sheet also being coated with said release agent;
  • the packaging container of claim 1 wherein said material is selected from the group consisting of a heat stabilized nylon an ethylene glycol-terephthalic acid polyester, and a clay coated kraft paper.
  • silicone release agent is selected from the group consisting of dimethyl silicones, methyl silicones containing silanic hydrogens, and hydroxy dimethyl silicones.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
US15570A 1970-03-02 1970-03-02 Package for highly viscous tacky materials Expired - Lifetime US3648882A (en)

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Application Number Priority Date Filing Date Title
US1557070A 1970-03-02 1970-03-02

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US (1) US3648882A (Direct)
BE (1) BE763586A (Direct)
DE (1) DE2109401C2 (Direct)
FR (1) FR2081638B3 (Direct)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837375A (en) * 1970-06-03 1974-09-24 Exxon Research Engineering Co Process for packaging highly viscous tacky materials
US3848739A (en) * 1972-10-27 1974-11-19 Union Oil Co Packaging and purifying graphite
US4759445A (en) * 1984-01-23 1988-07-26 Mcvay Malcolm S C Additive package for a method for compounding polymer formulations
USD299576S (en) 1986-12-11 1989-01-24 Don Kracke Refuse and storage container
USD299773S (en) 1986-12-11 1989-02-07 Don Kracke Refuse and storage container
US4816093A (en) * 1987-09-25 1989-03-28 Robbins Edward S Iii Separable laminate container
US4930644A (en) * 1988-12-22 1990-06-05 Robbins Edward S Iii Thin film container with removable lid and related process
US5028197A (en) * 1983-06-09 1991-07-02 Bjk Industries, Inc. Method and apparatus for securing a water proof liner to the walls of a container
US5060816A (en) * 1988-12-22 1991-10-29 Robbins Edward S Iii Composite container and associated carrier
DE9215129U1 (de) * 1992-11-06 1993-01-07 Teroson Gmbh, 6900 Heidelberg Ein- und Mehrweggebinde mit Einlegeteil
US5183152A (en) * 1990-09-04 1993-02-02 National Gypsum Company Humectants in joint compound containers
US5236102A (en) * 1990-12-21 1993-08-17 Sto Aktiengesellschaft Re-usable container
US5452800A (en) * 1991-04-08 1995-09-26 Petro Source Refining Partners Roofing asphalt packaging and method
US5733616A (en) * 1995-06-07 1998-03-31 Owens-Corning Fiberglas Technology, Inc. Consumable asphalt containers and method of reducing fumes from a kettle of molten asphalt
US5802815A (en) * 1994-02-14 1998-09-08 Henkel Kommanditgesellschaft Auf Aktien Process for the self-sealing of containers
US5979650A (en) * 1998-02-23 1999-11-09 Bunge Foods Easily removed sleeve and bulk containers and method incorporating same
US5992130A (en) * 1996-11-22 1999-11-30 Ato Findley S.A. Packaging of reactive hot-melt adhesives
US20040022989A1 (en) * 2002-03-20 2004-02-05 Hubert Kaffl Packaging surface element with non-adhesive coating and packaging surface with non adhesive coating
US20060081631A1 (en) * 2003-11-21 2006-04-20 Smith Vance M Iii Polymeric coated storage container
US20100237069A1 (en) * 2009-01-20 2010-09-23 Helou Jr Elie Multi-layer container
USD826055S1 (en) * 2016-06-01 2018-08-21 Louis Vuitton Malletier Packaging
US20180273269A1 (en) * 2014-03-24 2018-09-27 Sio Medical Products, Inc. Packaging for high purity solvents

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH603442A5 (Direct) * 1976-06-03 1978-08-15 Bucher Guyer Ag Masch
DE2659787A1 (de) * 1976-12-31 1978-07-13 Kernforschung Gmbh Ges Fuer Vorrichtung zum gasdichten befestigen eines folienbehaeltnisses
FR2664901A1 (fr) * 1990-07-17 1992-01-24 Nat Starch Chem Sa Produit adhesif et son procede de fabrication.
DE4023602A1 (de) * 1990-07-25 1992-01-30 Majer Christian Gmbh Co Kg Verbunddose, insbesondere zur verpackung von nahrungsmitteln
DE29713091U1 (de) 1997-07-23 1997-09-18 Gurit-Essex Ag, Freienbach Innensack für Mehrweggebinde

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20920A (en) * 1858-07-13 photo-litho
US2348622A (en) * 1941-10-29 1944-05-09 Standard Oil Dev Co Removable liner for viscous material containers
US2504482A (en) * 1949-06-17 1950-04-18 Premo Pharmaceutical Lab Inc Drain-clear container for aqueous-vehicle liquid pharmaceutical preparations
US2648487A (en) * 1947-07-25 1953-08-11 St Regis Paper Co Bag for packaging tacky polymeric materials
US2748673A (en) * 1951-03-09 1956-06-05 Hedwin Corp Liner for composite containers
GB752975A (en) * 1954-01-07 1956-07-18 Alfons Mauser Improvements in transport containers
US2771221A (en) * 1953-01-02 1956-11-20 Lining Components Ltd Liquid container
US2869722A (en) * 1957-10-14 1959-01-20 Fibreboard Paper Products Corp Paper products having a release coating and method of preparation thereof
US2907508A (en) * 1954-04-16 1959-10-06 Acme Steel Co Container for granular materials
US3545643A (en) * 1967-10-18 1970-12-08 Exxon Research Engineering Co Package for highly viscous tacky materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1634618U (de) * 1951-12-20 1952-02-14 Mauser Kg Spundverschluss.
FR1161905A (fr) * 1956-11-21 1958-09-08 Dispositif de conditionnement des produits pâteux, liquides..., en tubes ou étuis souples sous enveloppes rigides, et de commande pour expulser ces produits

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20920A (en) * 1858-07-13 photo-litho
US2348622A (en) * 1941-10-29 1944-05-09 Standard Oil Dev Co Removable liner for viscous material containers
US2648487A (en) * 1947-07-25 1953-08-11 St Regis Paper Co Bag for packaging tacky polymeric materials
US2504482A (en) * 1949-06-17 1950-04-18 Premo Pharmaceutical Lab Inc Drain-clear container for aqueous-vehicle liquid pharmaceutical preparations
US2748673A (en) * 1951-03-09 1956-06-05 Hedwin Corp Liner for composite containers
US2771221A (en) * 1953-01-02 1956-11-20 Lining Components Ltd Liquid container
GB752975A (en) * 1954-01-07 1956-07-18 Alfons Mauser Improvements in transport containers
US2907508A (en) * 1954-04-16 1959-10-06 Acme Steel Co Container for granular materials
US2869722A (en) * 1957-10-14 1959-01-20 Fibreboard Paper Products Corp Paper products having a release coating and method of preparation thereof
US3545643A (en) * 1967-10-18 1970-12-08 Exxon Research Engineering Co Package for highly viscous tacky materials

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837375A (en) * 1970-06-03 1974-09-24 Exxon Research Engineering Co Process for packaging highly viscous tacky materials
US3848739A (en) * 1972-10-27 1974-11-19 Union Oil Co Packaging and purifying graphite
US5028197A (en) * 1983-06-09 1991-07-02 Bjk Industries, Inc. Method and apparatus for securing a water proof liner to the walls of a container
US4759445A (en) * 1984-01-23 1988-07-26 Mcvay Malcolm S C Additive package for a method for compounding polymer formulations
USD299576S (en) 1986-12-11 1989-01-24 Don Kracke Refuse and storage container
USD299773S (en) 1986-12-11 1989-02-07 Don Kracke Refuse and storage container
US4816093A (en) * 1987-09-25 1989-03-28 Robbins Edward S Iii Separable laminate container
US4930644A (en) * 1988-12-22 1990-06-05 Robbins Edward S Iii Thin film container with removable lid and related process
US5060816A (en) * 1988-12-22 1991-10-29 Robbins Edward S Iii Composite container and associated carrier
US5323588A (en) * 1990-09-04 1994-06-28 National Gypsum Company Method of packaging aqueous slurries
US5183152A (en) * 1990-09-04 1993-02-02 National Gypsum Company Humectants in joint compound containers
US5236102A (en) * 1990-12-21 1993-08-17 Sto Aktiengesellschaft Re-usable container
US5452800A (en) * 1991-04-08 1995-09-26 Petro Source Refining Partners Roofing asphalt packaging and method
DE9215129U1 (de) * 1992-11-06 1993-01-07 Teroson Gmbh, 6900 Heidelberg Ein- und Mehrweggebinde mit Einlegeteil
US5802815A (en) * 1994-02-14 1998-09-08 Henkel Kommanditgesellschaft Auf Aktien Process for the self-sealing of containers
US5989662A (en) * 1995-06-07 1999-11-23 Owens Corning Fiberglas Technology, Inc. Consumable asphalt containers and method of reducing fumes from a kettle of molten asphalt
US5733616A (en) * 1995-06-07 1998-03-31 Owens-Corning Fiberglas Technology, Inc. Consumable asphalt containers and method of reducing fumes from a kettle of molten asphalt
US5992130A (en) * 1996-11-22 1999-11-30 Ato Findley S.A. Packaging of reactive hot-melt adhesives
US5979650A (en) * 1998-02-23 1999-11-09 Bunge Foods Easily removed sleeve and bulk containers and method incorporating same
US20040022989A1 (en) * 2002-03-20 2004-02-05 Hubert Kaffl Packaging surface element with non-adhesive coating and packaging surface with non adhesive coating
US20060081631A1 (en) * 2003-11-21 2006-04-20 Smith Vance M Iii Polymeric coated storage container
US20100237069A1 (en) * 2009-01-20 2010-09-23 Helou Jr Elie Multi-layer container
US8268417B2 (en) * 2009-01-20 2012-09-18 Biosphere Industries, Llc Multi-layer container
US20180273269A1 (en) * 2014-03-24 2018-09-27 Sio Medical Products, Inc. Packaging for high purity solvents
US10807781B2 (en) * 2014-03-24 2020-10-20 Sio2 Medical Products, Inc. Packaging for high purity solvents
USD826055S1 (en) * 2016-06-01 2018-08-21 Louis Vuitton Malletier Packaging

Also Published As

Publication number Publication date
FR2081638A7 (Direct) 1971-12-10
BE763586A (fr) 1971-09-01
DE2109401A1 (de) 1971-09-23
DE2109401C2 (de) 1982-02-25
FR2081638B3 (Direct) 1973-12-28

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