WO1998041571A1 - Etiquettes se pretant a la decoupe a l'emporte-piece - Google Patents

Etiquettes se pretant a la decoupe a l'emporte-piece Download PDF

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Publication number
WO1998041571A1
WO1998041571A1 PCT/US1998/005008 US9805008W WO9841571A1 WO 1998041571 A1 WO1998041571 A1 WO 1998041571A1 US 9805008 W US9805008 W US 9805008W WO 9841571 A1 WO9841571 A1 WO 9841571A1
Authority
WO
WIPO (PCT)
Prior art keywords
range
film
polypropylene
labels
label
Prior art date
Application number
PCT/US1998/005008
Other languages
English (en)
Inventor
Gary Michael Balakoff
Original Assignee
Exxon Chemical Patents Inc.
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 Exxon Chemical Patents Inc. filed Critical Exxon Chemical Patents Inc.
Publication of WO1998041571A1 publication Critical patent/WO1998041571A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene

Definitions

  • This invention relates generally to die-cuttable, conformable labels made from specific polypropylene films. More specifically this invention is directed toward labels rendered die-cuttable and conformable by using polypropylene films based on polypropylene hydrocarbon resin combinations.
  • Clear labels for bottles are generally sought that can be both die-cuttable on a liner stock and while being dispensed have a high degree of comformability to the contours of a bottle, jar can or the like. Because the process of filling and labeling bottles, cans, jars and the like must be highly automated and attain high speed to keep economics of the bottling process favorable, and because the labels must be applied with substantially no wrinkles, covering any and all contours and design embellishments, the films from which such labels are made must have properties that facilitate these label applying demands. Specifically, films for labels must have the ability to be printed, accept an adhesive, must be easily die-cut, dispensed, and very conformable.
  • MDO films which are generally cast films with a degree of orientation added in the machine or MD direction, fail to provide satisfactory label material, as while they can generally be successfully die-cut, their conformability is not satisfactory and the clarity may not be up to "clear label” standards.
  • label stock from certain polypropylene combinations will provide a label that is die-cuttable, clear, very conformable, printable, and dispensable with excellent clarity.
  • the labels or label stock are made from certain polypropylenes, including polypropylene/hydrocarbon resin blends that are extruded via the cast technique, without added orientation.
  • the combination of the resulting film's clarity, ultimate tensile strength, ultimate elongation, and 1% secant modulus surprisingly and unexpectedly provides the subsequently made labels with ease of die-cuttability, a high level of conformability, high clarity, excellent dispensability and printability. Labels made from films having the broadest range of properties as outlined below will meet this high combination of demands:
  • This invention concerns certain clear label materials made from a selected group of polypropylene combinations.
  • labels of polypropylene film combinations containing amounts of certain hydrocarbon resins are shown to have a unique set of physical properties.
  • the resulting labels have combinations of properties rendering them superior and unique to labels previously available.
  • the polypropylene/polypropylene hydrocarbon resin combination films disclosed herein are particularly well suited for use in producing certain classes of clear labels.
  • Such labels include, but are not limited to bottle labels, can labels, jar labels and the like made using one or more of the films disclosed herein. Additionally the labels of the present invention may also be used in metallized labels using techniques well known in the art.
  • Polypropylenes for use in certain embodiments of my invention include homopolymer and copolymer polypropylenes.
  • the homopolymer or copolymer materials should preferably have a melt flow rate (MFR) in the range of 2-15 dg/min.
  • copolymer materials for use in the present invention will usually be selected from copolymers of propylene and ethylene, with inclusion of ethylene at 1-5 weight percent, preferably 2-4 weight percent, more preferably 2-3 weight percent. Copolymers of other alpha-olefins having 4-20 carbon atoms are also contemplated as well as terpolymers of propylene, ethylene and one or more of the alpha-olefins.
  • the preferred polypropylenes will have a MFR in the range of 2-15 dg min., preferably 3-12 dg/min., more preferably 5-7 dg/min..
  • the polypropylene portion of my combination will be present in the combination in the range of from 5-30, preferably 5-25, more preferably 5-20, more preferably 10-20 weight percent based on the total weight of the polypropylene/polypropylene hydrocarbon resin blend combination.
  • Polypropylene hydrocarbon resin blends are commercially available. Discussion of such hydrocarbon resin properties are contained in US patents 5,213,744 and 4,911,749 incorporated herein by reference for purposes of US patent practice.
  • the blends should have a hydrocarbon resin content in the range of from 1-25, preferably 2-20, more preferably 5-20, most preferably from 10-20 weight percent hydrocarbon resin, based on the total polypropylene and hydrocarbon resin.
  • the polypropylene hydrocarbon resin blends should have a MFR in the range of from 10-40, preferably 12-30, more preferably 15-25 dg/min.
  • the propylene hydrocarbon resin blends will be present in said combinations in the range of from 70-95 weight percent, preferably 75-95, more preferably 80-95, most preferably 80-90 weight percent based on the total weight of the combination.
  • the combinations should have a combined melt flow rate to facilitate extrusion into a film.
  • the combination should preferably have a total or over all inclusion of hydrocarbon resin in the range of from 5-25, preferably 8-20, more preferably 8-15 weight percent hydrocarbon resin based on the total weight of the combination. While random copolymer polypropylene is used in the polypropylene portion of the combination in the examples which follow, different copolymers or even homopolymers may be used.
  • polypropylene homopolymers are used in the polypropylene hydrocarbon resin blend, copolymers may also be used.
  • the overriding principle when selecting such materials and extruding them should be that the combinations have relatively easy processability (into a film) and most importantly, the components of the combination should be present at effective amounts that render the film useable in high speed labeling operations by having the unique combination of properties discussed below. That is the materials, when combined should not only be processable into film, but have clarity, die cuttability, easy dispensability, printability and conformability, but should have the underlying property combinations discussed, for example, clarity, ultimate tensile strength, ultimate elongation, and 1% secant modulus. Physical Properties of the Combination
  • Films made from the combinations discussed above, which are subsequently made into labels will have a unique set of physical properties, the combination of which render the films particularly suitable for label manufacture and application.
  • PSI pounds per square inch
  • ASTM D882 at non humidity control Ultimate Tensile in psi (ASTM D882 at non humidity control) Ultimate Elongation % differing from ASTM D882 by having an initial jaw separation of 1" and a separation speed of 5'7minute.
  • 1% Secant Modulus psi (ASTM D882 at non humidity control) Haze % ASTM D- 1003 Gloss % ASTM D2457 Treatment
  • Tensile at yield will range from 2-10 K psi, preferably 2-8 K psi, more preferably
  • Ultimate Tensile in psi 2-10 psi preferably 3-9 psi, more preferably 5-8 psi (both MD and TD) Ultimate Elongation 300-950%, preferably 350-900, more preferably 400-900, most preferably 500-800% (both MD & TD)
  • Gloss 60-95 preferably 65-90, more preferably 75-90 most preferably 80-90%.
  • Films contemplated by certain embodiments of the present invention may be made utilizing the polypropylene/hydrocarbon resin blend combinations discussed supra, by processes including, blown and cast, preferred is a cast film process.
  • the films of the present invention can be formed into a single layer film, or may be one layer or more of a multi-layer film or film composite.
  • Films of the present invention may also be included in laminated structures especially coated or laminated adhesive.
  • a film, multi layer film, or laminated structure includes one or more polypropylene/polypropylene hydrocarbon resin blend combination film layers having the desirable physical properties of the film, in the ranges described above, it will be understood to be contemplated as an embodiment of the present invention.
  • Example 1 is fabricated from EscoreneTM PP6124, a nominal 20 MFR , 85% polypropylene homo polymer, 15% hydrocarbon resin blend present in the combination at 80%, and EscoreneTM PP-9012, a nominal 6 MFR random
  • Example 2 uses 100% EscoreneTM PP-9012
  • Example 3 is a commercially available BOPP Mobil Label-Lyte ® 155LL-
  • Example 4 is a commercially available Machine Direction Oriented (MDO) film.
  • Example 5 uses 100% of the EscoreneTM PP6124 which was subsequently treated at a standard power level corona discharge.
  • the combination film shows classic signs of over treatment, such as back treat and some pucker or wrinkle.
  • the treat level was backed off slightly to eliminate the over treat symptoms, the resulting films exhibited higher treat (lower surface tension) than is achievable with the other cast films, indicating a more receptive surface for printing and/or metallization.
  • Example 1 As can be seen from the Table 1 the film of Example 1, through its unique set of physical properties, makes a film that is both extremely die-cuttable and very conformable, while Example 2, the commercially available cast polypropylene film, is highly conformable, but not easily die-cuttable.
  • Example 3 by further contrast, has excellent die-cuttablility but low comformability.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

On décrit des étiquettes non imprimées pour bouteilles, canettes, bocaux, etc., faites d'un mélange de polypropylènes et d'une ou plusieurs résines d'hydrocarbures. Lesdites étiquettes sont réalisées à partir de films fabriqués avec lesdits mélanges, et présentent des propriétés physiques qui les rendent particulièrement efficaces dans des opérations d'embouteillage automatisées. Plus particulièrement, les films utilisés pour confectionner les étiquettes présentent des propriétés physiques qui confèrent une excellente aptitude à la découpe à l'emporte-pièce, et à la distribution, sans rupture matricielle, dérouleurs en continu, ou autres caractéristiques pouvant freiner la vitesse de l'opération d'embouteillage automatisée. En outre, lesdits films peuvent épouser la forme des bouteille à des vitesses d'application qui rendent l'opération économiquement intéressante. La tension superficielle desdites étiquettes confère une plus grande aisance d'impression et/ou de métallisation.
PCT/US1998/005008 1997-03-18 1998-03-12 Etiquettes se pretant a la decoupe a l'emporte-piece WO1998041571A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81906297A 1997-03-18 1997-03-18
US08/819,062 1997-03-18

Publications (1)

Publication Number Publication Date
WO1998041571A1 true WO1998041571A1 (fr) 1998-09-24

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PCT/US1998/005008 WO1998041571A1 (fr) 1997-03-18 1998-03-12 Etiquettes se pretant a la decoupe a l'emporte-piece

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1272328A1 (fr) * 2000-03-20 2003-01-08 Avery Dennison Corporation Films orientes biaxiallement decoupables a l'emporte-piece
US7314901B2 (en) 2003-01-30 2008-01-01 Exxonmobil Chemical Patents Inc. Polypropylene films
US8075830B2 (en) * 2006-12-15 2011-12-13 Fina Technology, Inc. Polypropylene blown film

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921749A (en) * 1986-05-30 1990-05-01 Exxon Chemical Patents Inc. Sealable films
US5212009A (en) * 1989-05-31 1993-05-18 Hoechst Aktiengesellschaft Multi-layer transparent polyolefin film for application in shrink labelling
US5213744A (en) * 1987-04-21 1993-05-25 Exxon Chemical Patents Inc. Process for making polyolefin films
WO1996021563A1 (fr) * 1995-01-13 1996-07-18 Avery Dennison Corporation Films et etiquettes orientes, aptes a se conformer a une surface, transparents
WO1996032441A1 (fr) * 1995-04-13 1996-10-17 Exxon Chemical Patents Inc. Aptitude au traitement amelioree pour des polyolefines catalysees par alliages organometalliques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921749A (en) * 1986-05-30 1990-05-01 Exxon Chemical Patents Inc. Sealable films
US4921749C1 (en) * 1986-05-30 2001-02-27 Exxon Chemical Patents Inc Sealable films
US5213744A (en) * 1987-04-21 1993-05-25 Exxon Chemical Patents Inc. Process for making polyolefin films
US5212009A (en) * 1989-05-31 1993-05-18 Hoechst Aktiengesellschaft Multi-layer transparent polyolefin film for application in shrink labelling
US5443895A (en) * 1989-05-31 1995-08-22 Hoechst Aktiengesellschaft Multi-layer transparent polyolefin film for application in shrink labelling
WO1996021563A1 (fr) * 1995-01-13 1996-07-18 Avery Dennison Corporation Films et etiquettes orientes, aptes a se conformer a une surface, transparents
WO1996032441A1 (fr) * 1995-04-13 1996-10-17 Exxon Chemical Patents Inc. Aptitude au traitement amelioree pour des polyolefines catalysees par alliages organometalliques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1272328A1 (fr) * 2000-03-20 2003-01-08 Avery Dennison Corporation Films orientes biaxiallement decoupables a l'emporte-piece
EP1272328A4 (fr) * 2000-03-20 2005-03-02 Avery Dennison Corp Films orientes biaxiallement decoupables a l'emporte-piece
US7314901B2 (en) 2003-01-30 2008-01-01 Exxonmobil Chemical Patents Inc. Polypropylene films
US8075830B2 (en) * 2006-12-15 2011-12-13 Fina Technology, Inc. Polypropylene blown film

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