Fruit-preserving green packing material with ethylene adsorption function and preparation method thereof

Abstract

The invention discloses a fruit-preserving green packing material with an ethylene adsorption function and a preparation method thereof, belonging to the field of packing materials. The material comprises 100-90 parts of polyethylene or polypropylene resin by weight and 0.5-10 parts of aluminum silicate molecular sieve by weight, wherein the granularity of the aluminum silicate molecular sieve is 5-100 microns and the silica alumina ratio of the same is 5-100. The preparation method comprises the steps of: firstly preparing the aluminum silicate molecular sieve; then melting and blending the aluminum silicate molecular sieve and the polyethylene or polypropylene resin, and blowing to make thin films. The ethylene adsorption rate of the packing material in the invention reaches 0.25-0.43ml / day.m<2>, and the oxygen transmissivity reaches 1300-4600ml / day.m<2>, therefore, a banana shelf life is prolonged by 25-125%, and the weightlessness is reduced by more than 50%.

Description

technical field [0001] The invention relates to a fresh-keeping green packaging material for fruit, in particular to a green packaging material for fresh-keeping fruit with the function of absorbing ethylene and a preparation method thereof, belonging to the field of packaging materials. Background technique [0002] With the development of the economy and the improvement of living standards, people's dietary life has transitioned from the single type of food and clothing in the past to the current type of diversified nutrition. The demand for fruit is increasing, and the requirements for its freshness are also increasing. Fresh fruits continue to breathe after picking, and the respiration is accompanied by metabolism, water evaporation and ethylene production, which promotes the further ripening of fruits and vegetables; this storage environment also makes it easy for bacteria to breed and multiply rapidly, leading to fruit rot. Ethylene gas is a plant growth hormone. Alt...

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Problems solved by technology

Ethylene absorbents such as potassium permanganate can prevent the accumulation of ethylene in the packaging bag, but potassium permanganate can easily dissolve the water in the environment and cause the fruit to be dyed, and potassium permanganate is a kind of chemical, which should not come into contact with food

There are also domestic reports that molecular sieves or activated carbon are used as ethylene adsorbents, sandwiched in corrugated boxes or pulp molded packaging boxes, which will affect the strength of corrugated boxes, and the ethylene adsorption efficiency is also low.

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