US3450256A - Heat-sealed blister package - Google Patents
Heat-sealed blister package Download PDFInfo
- Publication number
- US3450256A US3450256A US610896A US3450256DA US3450256A US 3450256 A US3450256 A US 3450256A US 610896 A US610896 A US 610896A US 3450256D A US3450256D A US 3450256DA US 3450256 A US3450256 A US 3450256A
- Authority
- US
- United States
- Prior art keywords
- paperboard
- substrate
- heat
- coating
- clay
- 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
Links
Images
Classifications
-
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
- B65D75/36—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed
- B65D75/366—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed and forming one compartment
-
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
- B65D75/36—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed
-
- 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.]
- Y10T428/24628—Nonplanar uniform thickness material
- Y10T428/24653—Differential nonplanarity at margin
-
- 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]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
- Y10T428/3179—Next to cellulosic
Definitions
- a package consisting of a thermoplastic cover having blisters formed therein which is heat-sealed to a coated, paperboard substrate.
- the coating on the paperboard consists of a mixture of clay, pigment, and a heat activatable resin binder. As the thermoplastic cover is placed in contact with the coated substrate, heat and pressure are applied thereto to activate the resin binder and form an adhesive bond between the cover and substrate.
- This invention relates to a container for packaging articles and more particularly to a container comprising a plastic blister attached to a paperboard backing.
- Plastic films and sheets are widely used today as a construction material for containers employed chiefiy in the marketing of relatively small, inexpensive articles. It is obvious that the cost of packaging an inexpensive article must be negligible in order for the Cost of the packaged article to be reasonable.
- One of the simplest packages for such articles is a fiat, paperboard Substrate covered on one side with a plastic lm formed into a blister-like enclosure or enclosures over the article or articles resting on or secured to the substrate.
- Such containers may be fabricated and subsequently loaded with an article by way of an entrance cut through the substrate or, preferably, the article and the paperboard may be simultaneously covered with a formed plastic film to produce the final package.
- the substrate generally employed in the above described package is paperboard made from the lightly beaten pulp of unbleached, softwood sulfate stock or mixtures of such stock with a hardwood sulfate stock.
- Paperboard manufactured from lightly beaten pulp and without bleaching is usually somewhat coarse and dark in color; accordingly, when paperboard is employed to make ornamental or decorative containers, it is coated to provide a smooth, white, finished appearance.
- the most common coating utilized for such a finish is a mixture of clay and pigment with a binder which is applied to the paperboard by calendaring.
- the coated paperboard is treated with an acrylic resin composition so as to incorporate a small amount of acrylic resins solids in the surface of the paperboard.
- a thermoplastic film can then be readily heat sealed to the treated paperboard with a high degree of adhesion.
- the acrylic resin coating composition may be applied to the clay- Coated paperboard, or preferably, the resin composition may be incorporated as the binder into the clay and pigment mixture employed as a coating. The latter method is preferred since with only one manufacturing step, the paperboard is coated to provide a white, smooth surface containing an acrylic resin binder which will readily heat seal to a thermoplastic film covering.
- Another object of this invention is to provide a blisterlike package which is fabricated without the use of a primer or adhesive between the cover and the substrate.
- FIGURE l is a perspective View of a blister package constructed in accordance with the instant invention.
- FIGURE 2 is a cross sectional fragmentary View showing the various components of a blister package in accordance with the prior art.
- FIGURE 3 is a view similar to FIGURE 2 but showing a fragmentary, cross-sectional view of the components required to form a blister package in accordance with the instant invention.
- a substrate covered in accordance with the instant invention may be utilized in other ways.
- the substrate could be a sign or decorative element which is protected from weathering by the plastic coating.
- a coating may be applied to a paperboard substrate which can be formed into weather-proof packaging. Other uses will be readily apparent to those skilled in the art.
- reference numeral 10 designates generally a blister package including a paperboard substrate 12 and a thermoplastic covering 14.
- the thermoplastic cover 14 has been previously formed into a blister 16 which will cover and protect an article resting on or secured to the substrate 12.
- the substrate 12 having a clay-coat finish 20 ⁇ on the surface thereof must have a primer coating or adhesive coating 22 applied to its coated surface before the thermoplastic covering 14 can be secured thereto.
- a primer coating or adhesive coating 22 applied to its coated surface before the thermoplastic covering 14 can be secured thereto.
- the clay-coat finish applied to the substrate 12 contains an acrylic resin binder which also acts as an adhesive when heat activated.
- the acrylic resins which have been found to be satisfactory as a binder and heat activatable adhesive are the polymeric acrylic acid esters and the polymeric alkacrylic acid esters. These materials are available commercially as coating compositions in the form of solutions or emulsions which, as slated above, can be applied directly to the paperboard or blended with the clay coating mixture so as to leave a deposit of resins solids when the liquid phase of the solution or emulsion is removed.
- a typical composition is latex in which the acrylic resins content may be from about l5 to 25% by weight of the composition, while the remainder is a liquid vehicle with a small portion of additives such as stabilizers, emulsifiers, and the like.
- the amount of acrylic resin which is necessary in order to provide an acceptable level of heat scalability is from about 2% to about 35% by weight of the clay and pigment mixture employed in coating the paperboard.
- thermoplastic materials which can be employed to prepare the covering film in accordance with this invention are those which are suitable for being formed into blisters as described above. Included among these materials are polyolefins, cellulose esters, vinyl polymers, and the like. A-mong the preferred materials are polyethylene, polypropylene, copolymers of propylene and butene-l, copolymers of ethylene and ethylacrylate, cellulose acetate, cellulose acetate butyrate, cellulose acetate proppropionate, polyesters such as polyethylene terephthalate film or Kodar poly(cyclohexylenedimethylene terephthalate-isophthalate) lm, and blends or paraffin Wax with any of the above polymers or copolymers.
- plastic materials can be made to adhere to substrates coated with the clay resin mixture as described above by means of a heat-sealing operation. Sealing is accomplished by applying heat and pressure to the preformed film as it rests on the substrate at the point at which a seal is desired. The heat and pressure applied to the film and the substrate cause the acrylic resin and the lm to become activated resulting in an adhesive bond being formed between the two. Good adhesion is obtained, therefore, between the substrate and film Without the use of a priming material or separate adhesive and without destroying the individual characteristics or properties of either the film or the coated substrate.
- the heat sealing quality of the products made in accordance with this invention are tested by comparing them to products obtained employing paperboard which has been coated with a clay and pigment mixture primed with a film of cellulose nitrate, and covered with a plastic blister heat sealed thereto.
- a heat seal is obtained employing 80 pounds per square inch of pressure for one second at 400 F. or for 2 seconds at 325 F.
- An excellent bond is obtained between a cover film of polyvinyl acetate and a paperboard substrate coated with a clay-acrylic resin mixture, by applying 80 pounds per square inch of pressure for one second at 415 F., or for two seconds at 375 F.
- the container of this invention may include decorative designs or printing on the paperboard, transparent or opaque thermoplastic film, or any of several other the material with special characteristics.
- a protective package for one or more articles comprising:
- thermoplastic cover attached by means of a heat seal bond between said cover and said acrylic resins to at least a portion of said coated surface of said paperboard;
- said shaped cover having at least one portion spaced from said substrate adapted to form a protective container for an article.
- thermoplastic of said cover is selected from the group consisting of cellulose acetate, cellulose acetate butyrate, or cellulose acetate propionate.
Landscapes
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61089667A | 1967-01-23 | 1967-01-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3450256A true US3450256A (en) | 1969-06-17 |
Family
ID=24446849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US610896A Expired - Lifetime US3450256A (en) | 1967-01-23 | 1967-01-23 | Heat-sealed blister package |
Country Status (2)
Country | Link |
---|---|
US (1) | US3450256A (de) |
BE (1) | BE709588A (de) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3756398A (en) * | 1971-10-13 | 1973-09-04 | Mattel Inc | Package having dimpled blister |
US3987892A (en) * | 1975-08-13 | 1976-10-26 | Olinkraft, Inc. | Display carton |
US4014134A (en) * | 1975-08-27 | 1977-03-29 | Womack Jr W Victor | Plant package |
US4749084A (en) * | 1986-11-12 | 1988-06-07 | Minnesota Mining And Manufacturing Co. | Tamper-indicating package with randomly disposed filaments |
US4750318A (en) * | 1986-08-21 | 1988-06-14 | Idemitsu Petrochemical Co., Ltd. | Blister packaging apparatus |
US4760919A (en) * | 1987-07-30 | 1988-08-02 | Minnesota Mining And Manufacturing Company | Tamper-indicating package |
EP0847921A1 (de) * | 1996-12-13 | 1998-06-17 | Westvaco Corporation | Verbundstruktur zur Verpackung und Aufnahme von Gegenständen, un Verfahren zu deren Herstellung |
US5893459A (en) * | 1995-09-25 | 1999-04-13 | Modern Aids, Inc. | Clear plastic package |
US20090166393A1 (en) * | 2007-02-01 | 2009-07-02 | Black & Decker Inc. | Multistage solenoid fastening device |
US20100108778A1 (en) * | 2008-10-30 | 2010-05-06 | Greenland Steven J | Device for containing and releasing a volatile substance |
US20110042256A1 (en) * | 2009-08-24 | 2011-02-24 | Greenland Steven J | Unitized package and method of making same |
US8763805B2 (en) | 2008-12-31 | 2014-07-01 | Aki, Inc. | Device for containing and releasing a sample material |
US9272830B2 (en) | 2009-08-24 | 2016-03-01 | Aki, Inc. | Unitized package of card and fluid vessel |
US10625915B2 (en) | 2008-01-21 | 2020-04-21 | Cpi Card Group—Minnesota, Inc. | Ultrasecure card package |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1982946A (en) * | 1928-05-09 | 1934-12-04 | Charles Lennig & Company Inc | Adhesive |
US2101107A (en) * | 1935-04-26 | 1937-12-07 | Du Pont | Molding compositions and process of molding |
US2750719A (en) * | 1952-04-21 | 1956-06-19 | Ind Radiant Heat Corp | Packaging method |
US2992203A (en) * | 1957-03-25 | 1961-07-11 | Rohm & Haas | High impact resistant polymers derived primarily from esters of acrylic and methacrylic acids |
US3100760A (en) * | 1960-10-10 | 1963-08-13 | Goodrich Co B F | Polymeric adhesives and method of preparation |
US3253705A (en) * | 1962-09-05 | 1966-05-31 | Goodyear Tire & Rubber | Skin-package |
GB1048706A (en) * | 1964-05-27 | 1966-11-16 | Clause Sa Pour La Culture Des | Improvements in or relating to packing for seeds |
-
1967
- 1967-01-23 US US610896A patent/US3450256A/en not_active Expired - Lifetime
-
1968
- 1968-01-18 BE BE709588D patent/BE709588A/xx unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1982946A (en) * | 1928-05-09 | 1934-12-04 | Charles Lennig & Company Inc | Adhesive |
US2101107A (en) * | 1935-04-26 | 1937-12-07 | Du Pont | Molding compositions and process of molding |
US2750719A (en) * | 1952-04-21 | 1956-06-19 | Ind Radiant Heat Corp | Packaging method |
US2992203A (en) * | 1957-03-25 | 1961-07-11 | Rohm & Haas | High impact resistant polymers derived primarily from esters of acrylic and methacrylic acids |
US3100760A (en) * | 1960-10-10 | 1963-08-13 | Goodrich Co B F | Polymeric adhesives and method of preparation |
US3253705A (en) * | 1962-09-05 | 1966-05-31 | Goodyear Tire & Rubber | Skin-package |
GB1048706A (en) * | 1964-05-27 | 1966-11-16 | Clause Sa Pour La Culture Des | Improvements in or relating to packing for seeds |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3756398A (en) * | 1971-10-13 | 1973-09-04 | Mattel Inc | Package having dimpled blister |
US3987892A (en) * | 1975-08-13 | 1976-10-26 | Olinkraft, Inc. | Display carton |
US4014134A (en) * | 1975-08-27 | 1977-03-29 | Womack Jr W Victor | Plant package |
US4750318A (en) * | 1986-08-21 | 1988-06-14 | Idemitsu Petrochemical Co., Ltd. | Blister packaging apparatus |
US4749084A (en) * | 1986-11-12 | 1988-06-07 | Minnesota Mining And Manufacturing Co. | Tamper-indicating package with randomly disposed filaments |
US4760919A (en) * | 1987-07-30 | 1988-08-02 | Minnesota Mining And Manufacturing Company | Tamper-indicating package |
US5893459A (en) * | 1995-09-25 | 1999-04-13 | Modern Aids, Inc. | Clear plastic package |
EP0847921A1 (de) * | 1996-12-13 | 1998-06-17 | Westvaco Corporation | Verbundstruktur zur Verpackung und Aufnahme von Gegenständen, un Verfahren zu deren Herstellung |
US20090166393A1 (en) * | 2007-02-01 | 2009-07-02 | Black & Decker Inc. | Multistage solenoid fastening device |
US10625915B2 (en) | 2008-01-21 | 2020-04-21 | Cpi Card Group—Minnesota, Inc. | Ultrasecure card package |
US11905089B2 (en) | 2008-01-21 | 2024-02-20 | Cpi Card Group—Minnesota, Inc. | Ultrasecure card package |
US11267628B2 (en) | 2008-01-21 | 2022-03-08 | Cpi Card Group—Minnesota, Inc. | Ultrasecure card package |
US11034497B2 (en) | 2008-01-21 | 2021-06-15 | CPI Card Group—Colorado, Inc. | Ultrasecure card package |
US20100108778A1 (en) * | 2008-10-30 | 2010-05-06 | Greenland Steven J | Device for containing and releasing a volatile substance |
US8763805B2 (en) | 2008-12-31 | 2014-07-01 | Aki, Inc. | Device for containing and releasing a sample material |
US20110042256A1 (en) * | 2009-08-24 | 2011-02-24 | Greenland Steven J | Unitized package and method of making same |
US9469435B2 (en) | 2009-08-24 | 2016-10-18 | Aki, Inc. | Unitized package and method of making same |
US9272830B2 (en) | 2009-08-24 | 2016-03-01 | Aki, Inc. | Unitized package of card and fluid vessel |
US8739973B2 (en) | 2009-08-24 | 2014-06-03 | Aki, Inc. | Unitized package of card and fluid vessel |
US8578684B2 (en) | 2009-08-24 | 2013-11-12 | Aki, Inc. | Unitized package and method of making same |
Also Published As
Publication number | Publication date |
---|---|
BE709588A (de) | 1968-05-30 |
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