Air valve membrane material, air valve membrane and inflatable bag

Abstract

The invention discloses an air valve membrane material which is of a multi-layer co-extrusion membrane structure. The material comprises a first polyolefin functional layer, a second polyolefin functional layer and a middle barrier layer, two sides of the middle barrier layer are respectively combined with the first polyolefin functional layer and the second polyolefin functional layer through adhesive resin layers, and the middle barrier layer is a nylon barrier layer and/or an ethylene-vinyl alcohol copolymer barrier layer. The invention further provides an air valve membrane and an inflatable bag which are made of the air valve membrane material, the inflatable bag comprises an upper bottom membrane, a lower bottom membrane and the air valve membrane, the air valve membrane is arrangedat an opening between the upper bottom membrane and the lower bottom membrane, and the upper bottom membrane and the lower bottom membrane adopt membrane materials containing nylon barrier layers or ethylene-vinyl alcohol copolymer barrier layers. The product provided by the invention has better barrier property, significantly improved gas-retaining property, and has the advantages of high strength, puncture resistance, low cost and the like.

Description

technical field [0001] The invention belongs to the field of organic packaging film materials and products thereof, in particular to an air valve film material and products thereof. Background technique [0002] The traditional method for cushioning and packaging items is to protrude from a plastic sheet with a plurality of raised small air bubbles, and wrap this plastic film on the outer periphery of the item. The shock-absorbing and buffering effect of the small air bubbles prevents the item from being Cracked or damaged in transit. However, the small air vesicles have a limited shock-absorbing ability, and can barely produce a buffering effect for relatively small impacts, but cannot achieve the purpose of buffering and shock-absorbing for relatively large vibrations or impact loads, which may easily cause rupture and damage to the article. [0003] figure 1 Another conventional air valve inflatable bag is presented, which includes an upper bottom film 110 and a lower b...

AI Technical Summary

Problems solved by technology

However, most of the existing air valve film materials used for inflatable bags use PE (polyethylene) film, while the bottom film mostly uses ordinary PA (nylon) film. The oxygen transmission rate is 3000-10000(cm 3 / m 2 *24h*23℃.atm.50%RH), the bottom film is PE / NYLON / PE, and the oxygen permeability is 50-500(cm 3 / m 2 *24h*23℃.atm.50%RH), based on the material reasons of the upper bottom film 110, the lower bottom film 120, the first air valve film layer 210 and the second air valve film layer 220, the air bag made is in use After a period of time, especially when it is continuously squeezed, the air will still slowly leak from the channels, membranes, etc., resulting in the inflatable bag’s gas retention effect not lasting. Will be reduced by 10% to 30%

[0004] When the existing inflatable bags are used for export products with a long transportation period such as the electronics industry or products with a shelf life of more than 3 months, due to the poor gas blocking effect of the PE air valve film, it is easy to cause damage to the products in the later transportation, and the inflatable bags are limited. Product application range

For example, it is difficult to promote the use of heavy objects with high added value such as refrigerators, washing machines, panels, electronic products, and furniture

In addition, during the production process of air bags made of such materials, the reject rate is high, and products with air leakage are not easy to detect, which brings great uncertainty to the quality of air bags and easily leads to damage to the packaged items

[0005] The bottom film and air valve film of the traditional inflatable bag mainly ensure its airtightness by increasing the viscosity of the material, and this method also leads to slow inflation speed and low inflation efficiency, which cannot adapt to high-speed inflation equipment; the film has low strength and poor impact resistance , it is easily affected by environmental factors during use, the film ruptures, leaks, generates waste, pollutes the environment, and increases costs; the production and processing performance is poor, and the film is prone to wrinkling and fluffing during processing, which cannot adapt to various bag-making equipment, resulting in high scrap rate

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