Unstretched polyethylene film with strong and weak heat sealability

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...

AI Technical Summary

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 between adjacent chambers, it is prone to sealing and sealing Phenomenon, it is difficult to peel off, or it is prone to chipping, slag dropping or bag breaking when peeling off, resulting in health and safety hazards

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