Five-layer co-extruded high-strength transparent film special for vegetables and flowers and preparation method thereof

Abstract

The invention relates to five-layer co-extruded high-strength transparent film special for vegetables and flowers and a preparation method thereof and belongs to the technical field of agricultural film. According to the film, light stabilizers are added into masterbatch used by the five film layers; polyethylene raw materials of an inner layer, the secondary inner layer and an outer layer are obtained by mixing LDPE and mLLDPE according to the ratio of 2:7; a polyethylene raw material of a middle layer is obtained by mixing LDPE, EVA and LLDPE according to the ratio of 2:3:4; a polyethylene raw material of the secondary outer layer is obtained by mixing LDPE, EVA and LLDPE according to the proportion of 2:3:4, or is obtained by mixing LDPE and LLDPE according to the proportion of 2:4. Thefive-layer co-extruded high-strength transparent film special for the vegetables and the flowers has the advantages that the service lifetime is prolonged, and mechanical strength, light transmission, softness and transparency are higher. The invention also provides the simple and feasible preparation method.

Description

Technical field [0001] The invention relates to a five-layer co-extruded high-strength transparent vegetable and flower special film and a preparation method thereof, and belongs to the technical field of agricultural film. Background technique [0002] my country has a continental monsoon climate and is suitable for the development of facility horticulture. The diversification of cultivated horticulture will become a new growth point for the horticulture industry, which will become another new economic growth point for our country. However, the current life of vegetable and flower greenhouse film in my country is 12 months, especially the original three-layer equipment production, various raw materials and additives cannot be reasonably distributed, resulting in low product strength, poor softness, and brittleness of the film. The place where the membrane touches is easy to crack under the action of external force, which does not meet the requirements of customers. The product ne...

AI Technical Summary

Problems solved by technology

However, at present, the service life of vegetable and flower shed film in my country is 12 months, especially in the original production with three-layer equipment, various raw materials and additives cannot be reasonably distributed, resulting in low product strength, poor softness, and brittle film. The place where the film contacts is easy to crack under the action of external force, which cannot meet the requirements of customers. The product needs to be replaced once a year, which requires a lot of manpower, material and financial resources, causing economic burdens to users. It is far from meeting the development needs of modern agriculture.

[0003] Today's agricultural greenhouse films generally have poor transparency, softness and dust-proof effect, resulting in low light transmittance, which affects the illumination and growth of crops, greatly reduces its yield and quality, and farmers' income is low.

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