A kind of light function multi-conversion plastic greenhouse composite film and its preparation method

Abstract

The invention discloses an optical functional multi-conversion plastic greenhouse composite thin film and a preparation method thereof. The optical functional multi-conversion plastic greenhouse composite thin film is prepared from the following components in parts by weight: 50 parts of plastic thin film, 10 to 20 parts of plastic powder, 10 to 30 parts of long-persistence material, 1 to 10 parts of photothermal conversion material, 1 to 5 parts of photocatalytic sterilizing agent and 1 to 5 parts of additive; wherein the optical functional multi-conversion plastic greenhouse composite thin film is prepared from the plastic thin film by adopting surface powder filler modification, and the surface powder filler modification refers to uniformly mix the components except the plastic thin film and then carry out composite forming on the plastic thin film through a hot-pressing technology. The optical functional multi-conversion plastic greenhouse composite thin film disclosed by the invention is used for a greenhouse, and compared with a common greenhouse, the temperature is increased by 2 to 3 DEG C in winter; photosynthesis of plants can be promoted through natural illumination strength reinforcement and delaying, and production increment and early maturing of the plants are realized; the morbidity of powdery mildew, black spot and the like in a damp greenhouse can be reduced through the bactericidal effect of the optical functional multi-conversion plastic greenhouse composite thin film, the usage of pesticide is reduced, and multiple effects of green, energy-saving, environment-friendly and production-increasing are realized by greenhouse planting.

Description

technical field

[0001] The invention belongs to the technical field of agricultural film production, and relates to a preparation process and formula of a composite material with functions of light-heat conversion, light conversion, light storage and thermal insulation and sterilization, in particular to a multi-modified plastic composite film preparation technology . Background technique

[0002] my country's annual demand for agricultural film is about 700,000 tons, and greenhouse planting covers a very wide range. If the utilization rate of natural light by greenhouse film can be fully improved, crops can be realized without increasing energy consumption, labor, chemical fertilizers and pesticides. The increase in production and income will undoubtedly play a significant role in solving the problems of shortage of agricultural area and environmental pollution in my country.

[0003] The long afterglow material is an alkaline earth aluminum (silicate) salt or yttrium oxysu...

Examples

Embodiment 1

[0036] According to the formula in Table 1, the long afterglow material, the photothermal conversion material, the photocatalyst bactericide, the anti-aging agent, and the polyethylene powder are mixed uniformly with a powder disperser. On a square polyethylene film (about 1.00 g) with a side length of 15 cm, each uniformly mixed inorganic nano-powder and polyethylene powder were uniformly applied to obtain a powder film. Place the powder film in a steel plate frame with a 15cm side of the inner frame and a 17cm side of the outer frame, add PET anti-film on the upper and lower sides, and add two steel plates on the upper and lower sides; The mold and powder film / PET release film / steel plate" are sandwiched into the hot press in turn, and under the conditions of temperature 99-120 ℃ and pressure 35-50MPa, the hot-press hot-rolling compound of the film is carried out, and the composite film is obtained for use.

Embodiment 2

[0038] According to the formula in Table 1, a powder film was prepared in the same manner as in Example 1.

[0039] Set PET anti-film on the upper and lower sides of the film, and add two steel plates on the top and bottom; sandwich the film and surface powder into the hot-pressing plate in turn according to the method of "steel plate / PET anti-film / powder film / PET anti-film / steel plate", and the hot-rolled The plate is put into a blast drying oven, and the film is hot-rolled and compounded under the conditions of a temperature of 165-185 ° C and a pressure of 35-50 MPa, and the compound film is obtained after 2 hours for use.

technical field

[0001] The invention belongs to the technical field of agricultural film production, and relates to a preparation process and formula of a composite material with functions of light-heat conversion, light conversion, light storage and thermal insulation and sterilization, in particular to a multi-modified plastic composite film preparation technology . Background technique

[0002] my country's annual demand for agricultural film is about 700,000 tons, and greenhouse planting covers a very wide range. If the utilization rate of natural light by greenhouse film can be fully improved, crops can be realized without increasing energy consumption, labor, chemical fertilizers and pesticides. The increase in production and income will undoubtedly play a significant role in solving the problems of shortage of agricultural area and environmental pollution in my country.

[0003] The long afterglow material is an alkaline earth aluminum (silicate) salt or yttrium oxysu...

Examples

Embodiment 1

[0036] According to the formula in Table 1, the long afterglow material, the photothermal conversion material, the photocatalyst bactericide, the anti-aging agent, and the polyethylene powder are mixed uniformly with a powder disperser. On a square polyethylene film (about 1.00 g) with a side length of 15 cm, each uniformly mixed inorganic nano-powder and polyethylene powder were uniformly applied to obtain a powder film. Place the powder film in a steel plate frame with a 15cm side of the inner frame and a 17cm side of the outer frame, add PET anti-film on the upper and lower sides, and add two steel plates on the upper and lower sides; The mold and powder film / PET release film / steel plate" are sandwiched into the hot press in turn, and under the conditions of temperature 99-120 ℃ and pressure 35-50MPa, the hot-press hot-rolling compound of the film is carried out, and the composite film is obtained for use.

Embodiment 2

[0038] According to the formula in Table 1, a powder film was prepared in the same manner as in Example 1.

[0039] Set PET anti-film on the upper and lower sides of the film, and add two steel plates on the top and bottom; sandwich the film and surface powder into the hot-pressing plate in turn according to the method of "steel plate / PET anti-film / powder film / PET anti-film / steel plate", and the hot-rolled The plate is put into a blast drying oven, and the film is hot-rolled and compounded under the conditions of a temperature of 165-185 ° C and a pressure of 35-50 MPa, and the compound film is obtained after 2 hours for use.

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