US20070084556A1 - Method of applying a label to a squeeze tube - Google Patents

Method of applying a label to a squeeze tube Download PDF

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Publication number
US20070084556A1
US20070084556A1 US11/251,033 US25103305A US2007084556A1 US 20070084556 A1 US20070084556 A1 US 20070084556A1 US 25103305 A US25103305 A US 25103305A US 2007084556 A1 US2007084556 A1 US 2007084556A1
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US
United States
Prior art keywords
tube
label
squeeze
sealing
squeeze tube
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.)
Abandoned
Application number
US11/251,033
Inventor
Neal Langseder
Edward Wiegand
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.)
CCL Label Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US11/251,033 priority Critical patent/US20070084556A1/en
Priority to US11/457,859 priority patent/US10351289B2/en
Priority to MX2008004931A priority patent/MX2008004931A/en
Priority to PCT/US2006/039747 priority patent/WO2007047314A2/en
Priority to PL06816730T priority patent/PL1949351T3/en
Priority to EP06816730.3A priority patent/EP1949351B1/en
Priority to CA002625882A priority patent/CA2625882A1/en
Assigned to TUBEDEC LLC reassignment TUBEDEC LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LANGSEDER, NEAL E., WIEGAND, EDWARD
Publication of US20070084556A1 publication Critical patent/US20070084556A1/en
Assigned to CCL LABEL, INC. reassignment CCL LABEL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TUBEDEC, LLC
Abandoned legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C3/00—Labelling other than flat surfaces
    • B65C3/26—Affixing labels to non-rigid containers, e.g. bottles made of polyethylene, boxes to be inflated by internal air pressure prior to labelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C7/00—Affixing tags
    • 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
    • G09F3/0295—Labels or tickets for tubes, pipes and the like
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/482—Drying adhesives, e.g. solvent based adhesives
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/086—EVOH, i.e. ethylene vinyl alcohol copolymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/744—Labels, badges, e.g. marker sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/0015—Preparing the labels or articles, e.g. smoothing, removing air bubbles
    • B65C2009/0059—Preparing the articles
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]

Definitions

  • Squeezable tube-shaped containers have a tubular body with one end heat-sealed along a straight line seam.
  • U.S. Pat. Nos. 5,632,951; 3,197,532; 5,908,124; and 5,213,235 disclose the use of blow molding techniques for forming tube-shaped containers.
  • U.S. Pat. No. 5,908,124 discloses the formation of an integral twist-off closure to eliminate the need for providing a separately manufactured closure.
  • U.S. Pat. No. 4,540,542 which discloses a method of making an extrusion blow molded container with an integral, removable closure
  • U.S. Pat. No. 5,141,136 which discloses a squeeze bottle having dual openings.
  • the squeeze tube is formed by cross-sealing the tubular body with a cross-sealing apparatus.
  • sealing There are generally five techniques for sealing including hot jaw sealing, wherein the tube is pressed between a pair of heated sealing jaws; sonic welding; induction sealing where a magnetic field is used to excite foil within the tube wall structure to melt the plastic before pressing together; hot air sealing, wherein heated air is used to melt the plastic before pressing; and laser sealing where a laser is used to heat the plastic before pressing.
  • the tube is not labeled or decorated in the seal area because damage to the label, ink, or surface coating can occur during sealing.
  • the label or coating can discolor due to the heat, or the label coating or ink may lose adhesion to the tube and separate due to the heat.
  • the application of label material, coating or ink on the surface of the tube in the seal area may affect the seal integrity or contaminate the inside of the seal area and prevent sealing. For these reasons the tube label and decoration generally does not cover the entire surface area of the tube.
  • the present invention is a method for applying a label to the sealed area of a squeeze tube.
  • the method involves adhering a label to a tube and sealing the tube so that a squeeze tube is formed wherein the label covers the sealed area of the squeeze tube.
  • the method involves the prestep of treating the tube under conditions which achieve a dyne level of at least 38.
  • the present invention also relates to a squeeze tube produced by the method of the invention.
  • the labeled surface area of a squeeze tube can be extended to encompass the sealed area of the tube by applying the label to a tube prior to sealing.
  • Particular embodiments of the invention embrace the use of an uncoated tube to promote label adhesion, while other embodiments provide that the tube is pretreated under conditions which achieve a dyne level of at least 38.
  • a squeeze tube is a flexible, cylindrical package made from plastic (e.g., low to high density polyethylene, polypropylene, polyvinyl chloride, and softouch, dual layer, and coextruded plastics) or laminate (ethylene vinyl alcohol resin) with one open end and one closed end.
  • plastic e.g., low to high density polyethylene, polypropylene, polyvinyl chloride, and softouch, dual layer, and coextruded plastics
  • laminate ethylene vinyl alcohol resin
  • a tube can be coated or uncoated prior to label adhesion.
  • a coated tube is intended to mean a tube used in the manufacture of a squeeze tube in which an organic surface coating has been applied.
  • organic surface coatings include any solvent-based, water-based or radiation-curable coating material designed to provide abrasion resistance, barrier properties and optionally enhanced gloss or matte finish.
  • surface coatings include epoxies, urethanes, polyesters, acrylics, and the like.
  • an uncoated tube is intended to mean a tube which lacks an organic surface coating.
  • the method of the instant invention can be carried out with a variety of label materials using a variety of adhesives.
  • solvent-type adhesives, emulsion-type adhesives or hot-melt type adhesives are suitable so long as the adhesive selected can withstand the heat and pressure of end sealing.
  • adhesives include, for example, rubbery adhesive agents, vinyl acetate adhesive agents, ethylene-vinyl acetate adhesive agents, polyvinyl alcohol adhesive agents, polyvinyl acetal adhesive agents, vinyl chloride adhesive agents, acrylic adhesive agents, polyamide adhesive agents, polyethylene adhesive agents, cellulose adhesive agents, polysulfide adhesive agents and hot-melt type high-polymer-containing adhesives.
  • label is used herein in the conventional sense to refer to a tag attached with adhesive to a surface so as to identify the object or its contents.
  • Labels of the instant invention are affixed to the surface of a tube (i.e., not a component of the tube itself) to provide product identifiers, product source/manufacturer identifiers, bar codes, nutritional information, decoration, and the like. Labels can be made of single or multiple layers and panels of any suitable paper or plastic material commonly employed in the labeling of consumer products.
  • a label of the instant squeeze tube covers all or a portion (e.g., 20%, 40%, 50%, 60%, 80%, or 100% of the surface area) of the flattened, closed end of the squeeze tube, also referred to herein as the sealed area of the squeeze tube.
  • the sealed area of the squeeze tube covers all or a portion (e.g., 20%, 40%, 50%, 60%, 80%, or 100% of the surface area) of the flattened, closed end of the squeeze tube, also referred to herein as the sealed area of the squeeze tube.
  • particular embodiments of the present invention embrace pretreating the unlabeled tube under conditions which achieve a dyne level of at least 38. In other embodiments, a dyne level of 38 to 48, or more is achieved.
  • Such conditions include treating the tube with flame, plasma, or corona to enhance label adhesion.
  • corona treating involves discharging up to about 10,000 volts of electricity from a ceramic electrode to a ground roll over which the tube film is passing. This high voltage field called corona alters the surface of the film, raising the surface energy of the film so that label adhesion is enhanced.
  • the label of the instant squeeze tube covers the seal area of the squeeze tube
  • particular embodiments of the instant invention embrace the use of a tube filling and sealing machine which seals the tube by heating the internal surface of the tube so that the label is exposed to minimal heat during sealing.
  • Suitable sealing techniques which heat the internal tube sealing surface before applying sealing pressure include hot air sealing, sonic welding, laser, and induction. Machines of this type are routinely used in the art of squeeze tube, bag and pouch manufacturing.
  • a label affixed to a squeeze tube in accordance with the instant method can achieve label peel strength adhesion values in the range of 1000 to 2500 grams/inch at 12 inches/minute pull speed optionally, label peel strength adhesion values in the range of 600 to 1200 grams/inch or 800 to 1500 grams/inch are also satisfactory under particular conditions.
  • the label as affixed herein withstands testing that would simulate normal use of the squeeze tube including, but not limited to, the moisture resistance testing, filled and unfilled; oven temperature storage at 45° C., filled and unfilled; product resistance; water submersion; soap water testing; eight weeks-long term storage at 45° C.; and flexing.
  • the instant method finds application in the manufacture of squeeze tubes for a variety of consumable or purchased goods or products including consumable products such as personal care products (e.g., soaps, shampoos, make-up, insect repellents, and the like); first aid products (e.g., ointments, sunscreens, and the like); cleaners (e.g., detergents and cleaning solutions); paints; and foodstuffs (e.g., yogurt, cheese-like products, jelly, and the like).
  • consumable products such as personal care products (e.g., soaps, shampoos, make-up, insect repellents, and the like); first aid products (e.g., ointments, sunscreens, and the like); cleaners (e.g., detergents and cleaning solutions); paints; and foodstuffs (e.g., yogurt, cheese-like products, jelly, and the like).

Abstract

The present invention relates to an improved method of labeling squeeze tubes. The method involves adhering a label to a tube, which is optionally treated under conditions which achieve a dyne level of at least 38, so that the label adheres to the tube. Upon sealing of the tube to generate the squeeze tube, the label covers the sealed area thereby maximizing the labeled area of the squeeze tube.

Description

    BACKGROUND OF THE INVENTION
  • Various products such as personal care or cosmetic products (e.g., toothpaste and lotions) are sold to consumers in flexible plastic tubes. Squeezable tube-shaped containers have a tubular body with one end heat-sealed along a straight line seam. For instance, see U.S. Pat. Nos. 5,632,951; 3,197,532; 5,908,124; and 5,213,235, which disclose the use of blow molding techniques for forming tube-shaped containers. In addition, U.S. Pat. No. 5,908,124 discloses the formation of an integral twist-off closure to eliminate the need for providing a separately manufactured closure. Also see U.S. Pat. No. 4,540,542 which discloses a method of making an extrusion blow molded container with an integral, removable closure and U.S. Pat. No. 5,141,136 which discloses a squeeze bottle having dual openings.
  • Generally, the squeeze tube is formed by cross-sealing the tubular body with a cross-sealing apparatus. There are generally five techniques for sealing including hot jaw sealing, wherein the tube is pressed between a pair of heated sealing jaws; sonic welding; induction sealing where a magnetic field is used to excite foil within the tube wall structure to melt the plastic before pressing together; hot air sealing, wherein heated air is used to melt the plastic before pressing; and laser sealing where a laser is used to heat the plastic before pressing. In most cases, the tube is not labeled or decorated in the seal area because damage to the label, ink, or surface coating can occur during sealing. The label or coating can discolor due to the heat, or the label coating or ink may lose adhesion to the tube and separate due to the heat. In addition the application of label material, coating or ink on the surface of the tube in the seal area may affect the seal integrity or contaminate the inside of the seal area and prevent sealing. For these reasons the tube label and decoration generally does not cover the entire surface area of the tube.
    • SUMMARY OF THE INVENTION
  • The present invention is a method for applying a label to the sealed area of a squeeze tube. The method involves adhering a label to a tube and sealing the tube so that a squeeze tube is formed wherein the label covers the sealed area of the squeeze tube. In particular embodiments, the method involves the prestep of treating the tube under conditions which achieve a dyne level of at least 38. The present invention also relates to a squeeze tube produced by the method of the invention.
    • DETAILED DESCRIPTION OF THE INVENTION
  • It has now been found that the labeled surface area of a squeeze tube can be extended to encompass the sealed area of the tube by applying the label to a tube prior to sealing. Particular embodiments of the invention embrace the use of an uncoated tube to promote label adhesion, while other embodiments provide that the tube is pretreated under conditions which achieve a dyne level of at least 38.
  • As used in the context of the instant invention, a squeeze tube is a flexible, cylindrical package made from plastic (e.g., low to high density polyethylene, polypropylene, polyvinyl chloride, and softouch, dual layer, and coextruded plastics) or laminate (ethylene vinyl alcohol resin) with one open end and one closed end. The package is filled through the open end with a machine designed for filling tubes. Subsequently, the filled tube is sealed at one end resulting in a package with a cylindrical, open end and a flattened, closed end.
  • For the purposes of the instant invention, a tube can be coated or uncoated prior to label adhesion. A coated tube is intended to mean a tube used in the manufacture of a squeeze tube in which an organic surface coating has been applied. Such organic surface coatings include any solvent-based, water-based or radiation-curable coating material designed to provide abrasion resistance, barrier properties and optionally enhanced gloss or matte finish. Such surface coatings include epoxies, urethanes, polyesters, acrylics, and the like. Conversely, an uncoated tube is intended to mean a tube which lacks an organic surface coating.
  • The method of the instant invention can be carried out with a variety of label materials using a variety of adhesives. As such, solvent-type adhesives, emulsion-type adhesives or hot-melt type adhesives are suitable so long as the adhesive selected can withstand the heat and pressure of end sealing. Such adhesives include, for example, rubbery adhesive agents, vinyl acetate adhesive agents, ethylene-vinyl acetate adhesive agents, polyvinyl alcohol adhesive agents, polyvinyl acetal adhesive agents, vinyl chloride adhesive agents, acrylic adhesive agents, polyamide adhesive agents, polyethylene adhesive agents, cellulose adhesive agents, polysulfide adhesive agents and hot-melt type high-polymer-containing adhesives.
  • The term label is used herein in the conventional sense to refer to a tag attached with adhesive to a surface so as to identify the object or its contents. Labels of the instant invention are affixed to the surface of a tube (i.e., not a component of the tube itself) to provide product identifiers, product source/manufacturer identifiers, bar codes, nutritional information, decoration, and the like. Labels can be made of single or multiple layers and panels of any suitable paper or plastic material commonly employed in the labeling of consumer products. Advantageously, a label of the instant squeeze tube covers all or a portion (e.g., 20%, 40%, 50%, 60%, 80%, or 100% of the surface area) of the flattened, closed end of the squeeze tube, also referred to herein as the sealed area of the squeeze tube. As such, more surface area of the consumer package is available for providing product information or decoration.
  • To facilitate adhesion, particular embodiments of the present invention embrace pretreating the unlabeled tube under conditions which achieve a dyne level of at least 38. In other embodiments, a dyne level of 38 to 48, or more is achieved. Such conditions include treating the tube with flame, plasma, or corona to enhance label adhesion. For example, corona treating involves discharging up to about 10,000 volts of electricity from a ceramic electrode to a ground roll over which the tube film is passing. This high voltage field called corona alters the surface of the film, raising the surface energy of the film so that label adhesion is enhanced.
  • Because the label of the instant squeeze tube covers the seal area of the squeeze tube, particular embodiments of the instant invention embrace the use of a tube filling and sealing machine which seals the tube by heating the internal surface of the tube so that the label is exposed to minimal heat during sealing. Suitable sealing techniques which heat the internal tube sealing surface before applying sealing pressure include hot air sealing, sonic welding, laser, and induction. Machines of this type are routinely used in the art of squeeze tube, bag and pouch manufacturing.
  • A label affixed to a squeeze tube in accordance with the instant method can achieve label peel strength adhesion values in the range of 1000 to 2500 grams/inch at 12 inches/minute pull speed optionally, label peel strength adhesion values in the range of 600 to 1200 grams/inch or 800 to 1500 grams/inch are also satisfactory under particular conditions.
  • Moreover, the label as affixed herein withstands testing that would simulate normal use of the squeeze tube including, but not limited to, the moisture resistance testing, filled and unfilled; oven temperature storage at 45° C., filled and unfilled; product resistance; water submersion; soap water testing; eight weeks-long term storage at 45° C.; and flexing.
  • The instant method finds application in the manufacture of squeeze tubes for a variety of consumable or purchased goods or products including consumable products such as personal care products (e.g., soaps, shampoos, make-up, insect repellents, and the like); first aid products (e.g., ointments, sunscreens, and the like); cleaners (e.g., detergents and cleaning solutions); paints; and foodstuffs (e.g., yogurt, cheese-like products, jelly, and the like). The instant method is a significant improvement in the manufacture of squeeze tubes because the product label can encompass nearly all of the available squeeze tube surface thereby enhancing the package appearance.

Claims (3)

1. A method for applying a label to the sealed area of a squeeze tube comprising adhering a label to a tube and sealing the tube so that a squeeze tube is formed wherein the label covers the sealed area of the squeeze tube.
2. The method of claim 1 further comprising the prestep of treating the tube under conditions which achieve a dyne level of at least 38.
3. A squeeze tube produced by the method of claim 1.
US11/251,033 2005-10-14 2005-10-14 Method of applying a label to a squeeze tube Abandoned US20070084556A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US11/251,033 US20070084556A1 (en) 2005-10-14 2005-10-14 Method of applying a label to a squeeze tube
US11/457,859 US10351289B2 (en) 2005-10-14 2006-07-17 Method of producing a squeeze tube with maximally labeled surface area
MX2008004931A MX2008004931A (en) 2005-10-14 2006-10-11 Method of producing a squeeze tube with maximally labeled surface area.
PCT/US2006/039747 WO2007047314A2 (en) 2005-10-14 2006-10-11 Method of producing a squeeze tube with maximally labeled surface area
PL06816730T PL1949351T3 (en) 2005-10-14 2006-10-11 Method of producing a squeeze tube with maximally labeled surface area
EP06816730.3A EP1949351B1 (en) 2005-10-14 2006-10-11 Method of producing a squeeze tube with maximally labeled surface area
CA002625882A CA2625882A1 (en) 2005-10-14 2006-10-11 Method of producing a squeeze tube with maximally labeled surface area

Applications Claiming Priority (1)

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US20070084557A1 (en) 2007-04-19

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