Unstretched polyethylene film with strong and weak heat sealability

A polyethylene film, low density polyethylene technology, applied in the field of unstretched polyethylene film, can solve the problems of easy sealing, sealing, narrow heat sealing temperature window, slag drop or bag breakage, etc., and achieve excellent production. The effect of bag dimensional stability and excellent barrier properties

Inactive Publication Date: 2019-10-15
安徽双津实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The currently disclosed technology, as a heat-sealing plastic film, can meet the needs of high heat-sealing strength, but due to the narrow heat-sealing temperature window, when used for heat-sealing isolation

Method used

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  • Unstretched polyethylene film with strong and weak heat sealability
  • Unstretched polyethylene film with strong and weak heat sealability

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] figure 1 It is a structural schematic diagram of the present invention, as shown in the figure, the film is composed of a three-layer structure of a heat-sealing layer 1.1, a core layer 1.2, and a corona layer 1.3.

[0023] This example is prepared by a three-layer co-extrusion casting process well known in the industry, wherein: the temperature of the extruder screw is set at 200-230°C, the temperature of the casting roll is 32°C, and the temperature ...

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Abstract

The invention discloses an unstretched polyethylene film with strong and weak heat sealing performance, which comprises at least three layers, namely a heat sealing layer, a core layer and a corona layer. The heat sealing layer is prepared from the following components in percentage by mass: 56-65% of metallocene polyethylene, 27-34% of polyolefin elastomer, 2.5-4.5% of slipping agent and 1.0-2.5%of anti-blocking agent mixed resin. The core layer is formed by blending 95.52-99.04 mass% of low density polyethylene and 0.96-4.48 mass% of slipping agent. The corona layer is mainly made of low-density polyethylene. The polyethylene film has excellent heat sealing performance and a wide heat sealing window, the requirement for high heat sealing strength of the edge of a multi-cavity bag can bemet, and the weak sealing performance and the proper heat sealing strength of a middle isolation seam can be provided. The polyethylene film is convenient for bare-handed stripping, the stripping surface is smooth, and the phenomena of damage and scrap falling are avoided.

Description

technical field [0001] The invention belongs to the technical field of packaging films, in particular to an unstretched polyethylene film with strong and weak heat sealing properties. Background technique [0002] Plastic film has been widely used in flexible packaging of food, medicine and daily necessities due to its heat-sealability, high barrier property and light weight. However, with the continuous upgrading of consumption, multi-chamber packaging has become popular (such as figure 2 As shown), this multi-chamber integrated packaging bag can be separately packaged and stored for different components and properties (such as: solid and solid, solid and liquid, dry and wet, etc.) of the package contents. When in use, open the heat-sealed isolation weld between adjacent packaging bags to achieve intercommunication, blending and configuration. The advantage is that it can not only provide better quality, fragrance or freshness preservation, but also does not require additi...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/32B32B27/18
CPCB32B27/08B32B27/18B32B27/32B32B2250/242B32B2439/40
Inventor 唐健王帮新张复宝
Owner 安徽双津实业有限公司
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