Waterproof, gas-permeable and degradable mulching film and method for preparing same

Abstract

The invention discloses a waterproof, gas-permeable and degradable mulching film. The waterproof, gas-permeable and degradable mulching film is made from raw materials including, by weight, 30-50 parts of polypropylene, 60-80 parts of modified starch, 10-20 parts of vulcanized butadiene rubber, 10-14 parts of propylene carbonate, 3-6 arts of nanometer titanium dioxide, 4-8 parts of nanometer medical stone, 3-7 parts of nanometer plant fibers, 1-5 parts of organic foaming agents, 1-4 parts of compatibilizers, 2-6 parts of antioxidants, 2-5 parts of plasticizers, 1-4 parts of lubricants, 3-8 parts of high-temperature type modified rosin resin emulsion and 2-5 parts of ultraviolet absorbents. The waterproof, gas-permeable and degradable mulching film has the advantages that the polypropyleneand the modified starch are used as the main raw materials for the waterproof, gas-permeable and degradable mulching film and are matched with the vulcanized butadiene rubber, the propylene carbonateand the high-temperature type modified rosin resin emulsion, an appropriate quantity of additives are further added into the raw materials, accordingly, the high-temperature resistance, the toughness,the waterproof performance, the gas permeability, the aging resistance, the antistatic properties and the anti-ultraviolet performance of the waterproof, gas-permeable and degradable mulching film can be greatly improved, bacteria can be effectively inhibited, and the waterproof, gas-permeable and degradable mulching film is excellent in biodegradability.

Description

technical field [0001] The invention relates to the field of plastic films, in particular to a waterproof, breathable and degradable plastic film and a preparation method thereof. Background technique [0002] Mulch film is the ground covering film, usually transparent or black PE film, and there are also green and silver films, which are used for ground covering to increase soil temperature, maintain soil moisture, maintain soil structure, prevent pests from invading crops and diseases caused by certain microorganisms, etc. , the function of promoting plant growth. [0003] The mulch looks like a thin layer, but it is quite effective. It can not only improve ground temperature, water, soil, fertilizer and fertilizer efficiency, but also has many functions such as weed control, pest control, drought and waterlogging resistance, salt suppression and seedling protection, improvement of light and heat conditions near the ground, and sanitation and cleaning of products. For th...

AI Technical Summary

Problems solved by technology

[0004] However, the existing mulch films still need to be further improved in terms of high temperature resistance, waterproof and air permeability, and aging resistance. The plastic degradation rate is very slow, and the complete decomposition of the high molecular weight polypropylene film remaining in the soil takes 200-300 years.