• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Extendable polyolefin film obtainable by joining two or more coextruded polyolefin layers and method for obtaining them. The present invention relates to an expandable polyolefin film obtainable by joining two or more co-extruded layers that can be perforated up to 70% of its surface without losing its mechanical strength properties. This film can be used in various sectors or jobs, such as securing loads on pallets or packaging perishable products, which due to their characteristics need ventilation or evacuation of temperatures, such as plants, flowers, fruits or vegetables. Another object of the present invention is a method for obtaining an expandable polyolefin film characterized in that it comprises joining two or more layers of polyolefin film co-extruded in opposite directions, in the direction of their natural force. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2619420A1
    申请号:ES201531701
    申请日:2015-11-24
    公开日:2017-06-26
    发明作者:Francisco RUIZ BERNAL
    申请人:Francisco RUIZ BERNAL；
    IPC主号:
    专利说明:

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    As indicated above, the invention offers the advantage over other products of the state of the art of achieving an extensible polyolefin film which with a thickness equal to or less than 6 microns (by way of example) achieves mechanical strength properties comparable to Conventional films with a thickness greater than 25 microns. Depending on the type of material, higher or lower values than those indicated can be obtained, although it will always be possible to reduce the thickness necessary to reach a certain mechanical force compared to conventional thicknesses in this type of sheets. EXAMPLES
    A series of examples of the present invention are described below, although the scope thereof is not limited to the particular conditions of each of them. EXAMPLE 1
    In a particular embodiment of the invention, the polyolefin film object of the invention is presented in a 50 cm wide coil (conventional measurement). However, the invention makes it possible to adapt to any mechanized system with the possibility of choosing the necessary bandwidth for the wrapping of loads from modular and independent coils that can be joined together in the reel carriage of the wrapping machines.
    In the case of using machines without a pre-stretch system, the product can be supplied already pre-stretched in a coil between 2,500 and 5,000 meters.
    Typically, for every 1,200 meters of unstretched film, 4,000 meters of stretched material can be obtained while maintaining all of its clamping power properties and without the need to use reinforcing strips or supplementary systems. EXAMPLE 2
    As an alternative, the conventional 50 cm wide coil has a longitudinal central cut that divides the coil into two identical parts, so that according to the load to be wrapped and without modifying the parameters of the wrapping machine the user can:

    use only half of the coil, with the consequent savings;

    increase ventilation; and / or

    get two identical coils of smaller size.
    8 EXAMPLE 3
    The film of the present invention can also be presented in a reduced format, with a width of 15 cm, optionally with or without an extension of the mandrel that serves as a
    5 handle for manual use. No commercial products have been found that describe extensible polyolefin films perforated with this size and that do not incorporate reinforcing strips or additional complements. EXAMPLE 4
    The film of the present invention can be used additionally in the packaging of fruit and vegetable trays, since it allows perforations similar to those of a net, throughout the sheet or partially. These perforations allow to regulate the aeration of cold necessary for the conservation of the product. The perforations also allow the rapid evacuation of naturally produced ethylene gas during the
    15 ripening of fruits and vegetables, which can prolong its useful life inside the package for its exhibition and sale without using chemical products such as stabilizers, anti-fog or chemical retardants.
    9
    权利要求:
    Claims (1)
    [1]
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    类似技术:
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    同族专利:
    公开号 | 公开日
    ES2619420B1|2018-03-20|
    WO2017089632A1|2017-06-01|
    EP3381675A1|2018-10-03|
    EP3381675A4|2019-01-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5766773A|1992-10-30|1998-06-16|Ventilair Films, Inc.|Laminated stretch wrap film adhered by cling forces|
    AT196878T|1996-07-26|2000-10-15|Harilaos Kavvadias|PERFORATED, PRE-STRETCHED STRETCH FILM FOR Wrapping Pallets|
    US20090317650A1|2008-06-23|2009-12-24|Inteplast Group, Ltd.|Cross-laminated elastic film|
    US20120152773A1|2009-08-28|2012-06-21|Treofan Germany Gmbh & Co. Kg|Polypropylene film comprising an opening aid|
    GB0915420D0|2009-09-04|2009-10-07|Megaplast Sa|Polyolefin pre-stretched packaging film|
    PL210951B1|2009-09-09|2012-03-30|Flexpol Społka Z Ograniczoną Odpowiedzialnością|Five-layer biaxially oriented polyethylene BOPE film and method for manufacturing thereof|
    ES2392087B1|2010-04-21|2013-10-18|Francisco RUIZ BERNAL|Cold die cutting machine for plastic film|
    WO2016088045A1|2014-12-05|2016-06-09|Nova Chemicals S.A.|Multilayer polyethylene films|
    法律状态:
    2018-03-20| FG2A| Definitive protection|Ref document number: 2619420 Country of ref document: ES Kind code of ref document: B1 Effective date: 20180320 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201531701A|ES2619420B1|2015-11-24|2015-11-24|EXTENSIBLE POLYOLEFIN FILM OBTAINABLE BY THE UNION OF TWO OR MORE COEXTRUSIONED POLYOLEFIN COATS AND METHOD FOR OBTAINING|ES201531701A| ES2619420B1|2015-11-24|2015-11-24|EXTENSIBLE POLYOLEFIN FILM OBTAINABLE BY THE UNION OF TWO OR MORE COEXTRUSIONED POLYOLEFIN COATS AND METHOD FOR OBTAINING|
    EP16868071.8A| EP3381675A4|2015-11-24|2016-09-19|Extendible polyolefin film that can be produced by joining two or more co-extruded polyolefin layers, and method for the production thereof|
    PCT/ES2016/070651| WO2017089632A1|2015-11-24|2016-09-19|Extendible polyolefin film that can be produced by joining two or more co-extruded polyolefin layers, and method for the production thereof|
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