Preparation method of mulching film for crisp pear fruiting period
A technology for fruiting and mulching, which is applied in the field of mulching film preparation in the fruiting period of pears, can solve the problems of increased sugar accumulation, reduced yield of pears, poor taste of pears, etc., and achieves enhanced film-forming effect, reduced addition amount, improved soil effect
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Embodiment 1
[0030] A method for preparing mulch film for pear fruiting stage, including the following steps:
[0031] S1. Degrade 20kg of polylactic acid by irradiation, the irradiation dose is 0.46MGy, exhaust air, add 1kg sepiolite, 2kg silane coupling agent, grind to a particle size of 20-40μm, then add 3kg polyvinyl chloride wax Stir for 16min at a stirring speed of 4200r / min to obtain a preformed material;
[0032] S2. Stir 20kg preformed material and 22kg polyethylene succinate for 16min at a stirring speed of 1200r / min and a stirring temperature of 120℃, then heat to 140℃, and then add 2kg calcium stearate, 1kg zinc diacrylate, 2kg heat The stabilizer was stirred for 10 minutes, and then the temperature was raised to 164°C, 1kg of iron stearate and 20kg of medical stone powder were added, and the stirring was continued for 20 minutes, and then the temperature was lowered to room temperature at a speed of 5°C / min under stirring, and then the film was blown into a film. The temperature o...
Embodiment 2
[0034] A method for preparing mulch film for pear fruiting stage, including the following steps:
[0035] S1. Degrade 40kg of polylactic acid by irradiation, the irradiation dose is 0.40MGy, exhaust air, add 5kg sepiolite, 1kg silane coupling agent, grind to a particle size of 20-40μm, and then add 5kg polyvinyl chloride wax Stir for 10 minutes at a stirring speed of 4500r / min to obtain a preformed material;
[0036] S2. Stir 10kg of preformed material and 35kg polyethylene succinate for 10min at a stirring speed of 1400r / min and a stirring temperature of 100℃, then heat up to 148℃, and then add 1kg magnesium stearate, 2kg zinc diacrylate, 1kg heat The stabilizer was stirred for 20 minutes, and then the temperature was raised to 155°C. 2kg of 2-hydroxy-4-methylacetophenone oxime iron and 8kg of zeolite powder were added and stirred for 40 minutes, and then cooled to room temperature at a rate of 2°C / min under stirring. The film is blown into a film, and the temperature of the film...
Embodiment 3
[0038] A method for preparing mulch film for pear fruiting stage, including the following steps:
[0039] S1. Degrade 25kg of polylactic acid by irradiation, the irradiation dose is 0.44MGy, exhaust air, add 2kg of sepiolite, 1.8kg of silane coupling agent, grind to a particle size of 20-40μm, then add 3.5kg of polychloride Stir the ethylene wax for 14 minutes at a stirring speed of 4300r / min to obtain a preform;
[0040] S2. Stir 18kg of preformed material and 26kg of polyethylene succinate for 14min at a stirring speed of 1250r / min, stirring temperature of 115°C, and then heating to 142°C, then add 1kg magnesium stearate, 0.7kg calcium stearate, 1.2kg zinc diacrylate and 1.7kg heat stabilizer continue to stir for 13min, then heat to 162℃, add 1.4kg iron acetylacetonate, 10kg diatomaceous earth, 8kg medical stone powder and continue to stir for 25min, then at 4℃ / min under stirring The speed is reduced to room temperature, and the film is blown into a film. The temperature of the ...
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