High-barrier PVA coating liquid and application thereof

Abstract

The invention relates to the technical field of packaging materials, and in particular, relates to high-barrier PVA coating liquid and application thereof. Dried products of edible mushrooms are easy to absorb moisture and damp when stored in a humid environment, and decay and deteriorate under the action of oxygen, so that the edible value is lost, and a pure PE packaging bag is relatively good in moisture resistance, but relatively poor in oxygen barrier performance. Aiming at the technical problems, the invention provides the high-barrier PVA coating liquid, modified graphene is added into the components of the high-barrier PVA coating liquid, the modified graphene has high hydrophobicity, the high-barrier PVA coating liquid is coated on the surface of a PE packaging film, so that the water vapor transmission rate of a packaging bag can be effectively reduced, copper atoms are further loaded on the surface of a molecular structure of the modified graphene, the high reducibility is achieved, and oxygen in the external environment can be effectively prevented from entering the PE packaging bag; the high-barrier PVA coating liquid is also added with a plant extract with relatively strong oxidation resistance and a food deoxidant, so that the oxygen barrier performance of the packaging bag is effectively improved.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a high-barrier PVA coating liquid and its application. Background technique [0002] Edible mushrooms refer to mushrooms (large fungi) with huge fruiting bodies and edible mushrooms, commonly known as mushrooms. There are more than 350 kinds of edible fungi known in China. The common edible fungi are: shiitake mushrooms, straw mushrooms, mushrooms, fungus, white fungus, Hericium erinaceus, bamboo fungus, matsutake (matsutake), tricholoma, red mushroom, ganoderma lucidum, cordyceps, truffles , Bailing mushroom and boletus etc. [0003] Freshly picked edible fungi have a high water content, as high as 70-95%. They are not resistant to storage at room temperature, are prone to oxidative discoloration, and autolytic rot, which is not conducive to storage, transportation and sales. In my country, due to relatively backward fresh-keeping technology and lack of cold chain ...

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Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the technical problem to be solved by the present invention is: the dry products of edible fungi are easy to absorb moisture and get damp when stored in a humid environment, rot and deteriorate under the action of oxygen, and lose their edible value. Simple PE packaging bags Moisture resistance is better, but its performance of blocking oxygen is poor

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