Novel polyethylene plastic greenhouse cloth and production method thereof
A technology of polyethylene plastic and shed cloth, applied in chemical instruments and methods, botanical equipment and methods, layered products, etc., can solve the problems of plastic films being easily broken by strong winds, short service life, and tearing, and achieve Good dripping anti-fog effect, long service life and good light transmittance
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Embodiment 1
[0021] Production method of the present invention comprises the following steps:
[0022] (1) Preparation of anti-aging masterbatch. After blending various anti-aging additives in proportion according to the mass parts, the anti-aging masterbatch is obtained by granulating through an extruder;
[0023] (2) Drawing and mixing, mix the raw materials required for the middle layer 2 in proportion, and send them to a high-speed mixer to mix evenly;
[0024] (3) Wire drawing, feed the raw material prepared in step 2 into the extruder, heat and plasticize through the screw, the heating temperature is between 180-270 °C, and extrude into a film through the die head molding, and then cooled by water, the water temperature is 30 -45°C, use a blade to cut the film into embryo filaments, and set the draft ratio, stretch it into a flat filament that meets the technical requirements through an oven or a stretching plate, and then heat-set the flat filament to control the thermal shrinkage r...
Embodiment 2
[0029] Perform performance testing on the plastic greenhouses of the present invention and ordinary plastic greenhouses, compare the performance values between the two, and only observe the performance differences. The comparison of the test data between the plastic greenhouse cloth of the present invention and the ordinary plastic greenhouse film is shown in the following table:
[0030]
[0031] It can be seen from the above results that the greenhouse cloth obtained in the present invention has better physical properties, strength index, thermal shrinkage rate and other indexes than ordinary plastic greenhouse film, high strength, good weather resistance, not easy to tear and wear, and good light transmittance. Although the initial light transmittance is slightly lower than that of plastic film, it has good wear resistance and slow light transmittance attenuation.
[0032] The present invention forms a three-layer composite structure by combining the outer layer 1 and t...
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