A kind of high barrier liquid container bag and preparation method thereof

Abstract

The invention discloses a high-barrier liquid container bag and a preparation method thereof, belonging to the technical field of packaging and transportation. The invention comprises an outer film and an inner film heat-sealed and connected to the inner wall of the outer film, and is characterized in that: the inner film is degraded The membrane, a barrier layer is arranged in the degradable membrane, and the degradable special material other than the barrier layer of the degradable membrane is composed of PBAT, polylactic acid, polybutylene succinate, chain extender, first antioxidant and hydrated aluminum magnesium carbonate; The outer film is a modified polyethylene film, the inner wall of the outer film is a heat-sealing layer, the heat-sealing layer is made of a special material for heat-sealing, and the special material for heat-sealing is made of low-density polyethylene, ethylene and vinyl acetate copolymer, second antioxidant and Lubricant composition. The flexitank can only peel off the degradable inner film adhering to the packaged material after use, and the outer film can be reused to avoid environmental pollution; at the same time, the barrier property of the flexitank is improved, the air permeability is reduced, and the preservation of the packaged material is prolonged. cycle.

Description

A kind of high-barrier bulk liquid bag and preparation method thereof technical field The invention belongs to the technical field of packaging and transportation, and in particular relates to a high-barrier liquid container bag and a preparation method thereof. Background technique [0002] Flexitank is a new type of flexible packaging container capable of storing and transporting various non-hazardous liquid goods. Also called ton bag or ton barrel. Since there are no empty boxes, empty return freight and cleaning costs, and can effectively avoid cross-contamination of goods, compared with Tankers and tank boxes have more advantages, so they are widely used in the storage and transportation of non-dangerous liquid goods such as oil, syrup and red wine. Existing container flexitank mainly includes two kinds: one is made of traditional petroleum-based plastic polyethylene PE film, and the National utility model patent 201620798911.8 discloses a new type of IBC cube in...

AI Technical Summary

Problems solved by technology

[0004] Both of the above two liquid bags are made of polyethylene or polypropylene as the main material, which not only has the disadvantages of poor barrier performance and high oxygen permeability, but also because the film is contaminated with a large amount of liquid, it is very difficult to recycle the liquid bag. The cost is very high, and the waste will cause great damage to the ecological environment

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