EP1729272A1 - Film thermorétractable en matériau plastique pour étiquetage - Google Patents

Film thermorétractable en matériau plastique pour étiquetage Download PDF

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Publication number
EP1729272A1
EP1729272A1 EP06003342A EP06003342A EP1729272A1 EP 1729272 A1 EP1729272 A1 EP 1729272A1 EP 06003342 A EP06003342 A EP 06003342A EP 06003342 A EP06003342 A EP 06003342A EP 1729272 A1 EP1729272 A1 EP 1729272A1
Authority
EP
European Patent Office
Prior art keywords
label
labels
film
shrinkage
heat
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.)
Withdrawn
Application number
EP06003342A
Other languages
German (de)
English (en)
Inventor
Frank Heermann
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.)
Bischof and Klein SE and Co KG
Original Assignee
Bischof and Klein SE and Co KG
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 Bischof and Klein SE and Co KG filed Critical Bischof and Klein SE and Co KG
Publication of EP1729272A1 publication Critical patent/EP1729272A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • G09F3/04—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps to be fastened or secured by the material of the label itself, e.g. by thermo-adhesion

Definitions

  • the present invention relates to a label made of thermally shrinkable plastic material.
  • Labels made of shrinkable plastic material are increasingly replacing traditional paper labels.
  • the labels produced from shrink films or shrink sleeves have the advantage of completely sheathing even irregularly shaped containers. These labels are impervious to moisture, they do not dissolve unintentionally, can be provided with large area imprints and still allow a high degree of transparency, so that the product marked with the label is still visible.
  • the labels can also be processed into security and tamper-evident seals.
  • the shrink labels have shrinkage values, which can be adapted within certain limits to the particular application.
  • the known shrink labels are shrinkable depending on the pretreatment in the transverse direction, but also in the longitudinal direction.
  • the known films used are traded as rolled goods or as a prefabricated hose.
  • the labels made of shrinkable plastic material are today mainly made of PVC or PET. Occasionally, oriented polystyrene or oriented polypropylene is used. In these known starting materials, the problem arises that especially the material PVC, but also the other materials are difficult to separate and dispose of other packaging materials and waste. In addition, the shrinkage behavior of the known materials is not satisfactory in all applications.
  • the object is achieved by the label is made of a predominantly or exclusively longitudinally stretched film of a polyethylene material.
  • Polyethylene waste can be incinerated without polluting the environment. Polyethylene is considered harmless to health and can therefore be disposed of in an environmentally friendly way. In addition, polyethylene has a lower density than prior art shrink film materials, except for OPP, and thus can be more easily separated from other materials. Polyethylene is also inexpensive and can be stretched to a considerable extent and then shrunk again. The material also has sufficient rigidity to make the label sufficiently durable and resistant to mechanical stress.
  • the labels according to the invention are clearly superior to the previously known wrap-around labels based on O-PP.
  • the labels according to the invention can also adapt to very unusual shaped packaging bodies.
  • the shrinkage temperatures are still within a manageable range, whereby the processing effort remains within reasonable limits.
  • the material for the labels is made of a blown film whose material is made Polyethylene exists.
  • the mechanical properties of the polyethylenes are highly dependent on the molecular size and structure of the polyethylenes. With the density increase shear modulus, hardness, yield strength and melting range; the shock resistance, transparency, swellability and solubility then decrease. With the same density increase with increasing molecular weight of the polyethylene tear strength, elongation, shock resistance, impact resistance and creep strength.
  • the blown film can be made of pure LLDPE, but blends with HDPE or LDPE are also possible. The mixture selected in each case for a use case must be selected by a person skilled in the art depending on the desired properties.
  • the blown film used can be extruded with an inflation ratio. A transverse shrinkage effect generated thereby is compensated again during later stretching of the film. After extrusion, the film is conveyed into the stretching oven where it is heated and stretched. Thereafter, the film runs out of the stretching oven again, is cooled, laid flat and cut. Upon stretching, the macromolecules are oriented longitudinally and this orientation is frozen with subsequent cooling. Upon subsequent heating, the macromolecules revert to their normal position, causing the film to shrink.
  • the extruded film has a thickness of 180 microns, after stretching, the thickness is still 45 microns.
  • the stretch ratio is 1: 4.
  • the stretched film can be delivered as a roll or in sections.
  • the material used has a density of less than 1 g / cm 3 , it does not sink down in the water like metal, sand and other substances, but stays on top of the water surface and can thus be easily separated from other waste materials become.
  • the minimum realizable density is currently about 0.87 g / cm 3 .
  • the density depends not only on the starting material, but also on the particular additive. At a density of 0.92 to 0.95, sufficient strength can be set with good shrink properties.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
EP06003342A 2005-03-01 2006-02-18 Film thermorétractable en matériau plastique pour étiquetage Withdrawn EP1729272A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520003213 DE202005003213U1 (de) 2005-03-01 2005-03-01 Etikett aus thermisch schrumpfbarem Kunststoffmaterial

Publications (1)

Publication Number Publication Date
EP1729272A1 true EP1729272A1 (fr) 2006-12-06

Family

ID=34716915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06003342A Withdrawn EP1729272A1 (fr) 2005-03-01 2006-02-18 Film thermorétractable en matériau plastique pour étiquetage

Country Status (2)

Country Link
EP (1) EP1729272A1 (fr)
DE (1) DE202005003213U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2678158T3 (pl) * 2011-02-23 2019-08-30 Ccl Label, Inc. Jednokierunkowo zorientowana polimerowa etykieta termokurczliwa oparta na polietylenie

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994021726A2 (fr) * 1993-03-23 1994-09-29 Soten S.R.L. Feuille thermoretractable a une seule couche et a orientation biaxe comportant du polyethylene lineaire basse densite, et procede de fabrication associe
EP0664534A2 (fr) * 1993-12-27 1995-07-26 Fuji Seal, Inc. Etiquette thermoretrécissable
WO2003016052A1 (fr) * 2001-08-13 2003-02-27 Linpac Plastics Pontivy S.A. Film multicouche thermoretractable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994021726A2 (fr) * 1993-03-23 1994-09-29 Soten S.R.L. Feuille thermoretractable a une seule couche et a orientation biaxe comportant du polyethylene lineaire basse densite, et procede de fabrication associe
EP0664534A2 (fr) * 1993-12-27 1995-07-26 Fuji Seal, Inc. Etiquette thermoretrécissable
WO2003016052A1 (fr) * 2001-08-13 2003-02-27 Linpac Plastics Pontivy S.A. Film multicouche thermoretractable

Also Published As

Publication number Publication date
DE202005003213U1 (de) 2005-06-30

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