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Oriented tear zone for a plastic film

A plastic film, zone technology for thin material handling, rigid/semi-rigid container manufacturing, box making operations, etc.

Inactive Publication Date: 2010-02-17
AISAPACK HLDG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, these methods incur industrial expenditure mainly related to investment, extra steps in the method or loss of productivity

Method used

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  • Oriented tear zone for a plastic film
  • Oriented tear zone for a plastic film
  • Oriented tear zone for a plastic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] attached figure 1 shows the linear displacement (arrow) of the plastic film 3 for the first cut (schematically shown by the cutting tool 1), after which the edges of the pre-created groove 11 are welded, schematically by the welding device 2 Welding is shown.

[0041] After the soldering step is completed, the plastic film 3 can undergo another transformation step, such as bonding or coating. The plastic film 3 can also be formed on a bag production machine or an FFS machine. Furthermore, the steps may be performed in a cutting / welding method.

[0042] Advantageously, a step (not shown) of taping the weld seam can be performed after welding.

[0043] This step can be performed according to different methods and / or at different points, specifically:

[0044] - on the winder

[0045] - while extruding

[0046] - when laminating

[0047] - when cutting

[0048] - When the package is made, whether this is on a machine that makes pre-made bags or an FFS machine that...

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PUM

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Abstract

The invention relates to a plastic film (3) including a pre-existing oriented tear zone (11, 7), characterised in that the zone (11, 7) comprises a butt weld (7) which assembles one end of the plasticfilm (9) with another end of the plastic film (10), said weld zone being disposed in the thickness of one or more of the welding layers of the plastic film (3). The invention also relates to a methodand a device for producing said plastic film.

Description

technical field [0001] The present invention The present invention relates to plastic films having at least one pre-existing zone of weakness for forming a directional tear zone. Such plastic films are used in particular in the field of packaging in which the contents can be dislodged when a part of the container is torn. Background technique [0002] In this text, the term "welding" should be understood to mean the operation of joining two parts together (with or without filler material) by melting their edges, resulting in a uniform, smooth, high-strength connection department. [0003] Plastic films are currently used in many applications, especially in packaging. Plastic films can be monolayer or multilayer and can be obtained by casting extrusion, extrusion blow molding, coating, thermal lamination or bonding. These films can be printed or can be colorless. [0004] One of the problems encountered with films of the prior art is that it is difficult to tear them (whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/02
CPCB29C66/43B29C66/91B29C65/74B29C65/04B32B43/003B32B7/04B29C66/94B65B61/18B29K2067/00B29C2793/0081B29L2031/7128B29C65/08B29C65/76B32B15/20B31B2201/90B29C66/8362B29K2023/06B29C65/10B31B1/90B29C65/5042B29C2793/0054B29C65/18B29C66/723B29C65/02B29K2023/12B29K2305/02B65D75/58B29C66/1142B32B2553/00B32B15/08B29L2009/003B29L2009/00B29C66/92B29C66/944B29C66/7234B29C66/72321B29C66/71B31B50/81B29C66/1122Y10T428/15Y10T156/1064Y10T156/13Y10T156/1062B29K2077/00B29K2067/003
Inventor 斯蒂法尼·马修
Owner AISAPACK HLDG SA