High polymer film and manufacturing method thereof

Abstract

The invention relates to a high polymer film and a preparation method thereof. The high polymer film is prepared by weighing and mixing 80-90% of liquefied dry plant straw powder, 5-20% of humic acid HA, 0.5-2% of salicylic acid and 0.3-0.5% of sodium dehydroacetate (food-grade organic matter preservative) according to a proportion. The film forming matter can be used for being mixed with water to be sprayed and naturally air-dried to form a film, the film thickness is adjustable, and the film forming matter can be widely used for fruit and vegetable spraying and film coating protection, is similar to bagging, reduces fruit cracking, sunburn and external bacterium invasion, reduces fruit rust occurrence, reduces transpiration, resists drought and moisturizes, blocks the attack center, closes girdling, scraping and rotting of plants, prunes wounds and moisturizes grafting unions, and is similar to biological bark. The fruit and vegetable fresh-keeping agent can accelerate wound healing, prevent fruit and vegetable freezing, prevent dry tips, improve pesticide adhesion, delay pesticide validity period and resist rain wash, and can be used for fruit and vegetable fresh-keeping, soil improvement and the like.

Description

[0001] The invention belongs to the technical field of plant protection, and particularly relates to a high molecular polymer film of a food-grade water-soluble physical copolymer used for film protection of fruits and vegetables, referred to as a high polymer film.

[0002] At present, the method of fruit bagging (paper bag or plastic bag) is generally used in fruit and vegetable production to prevent and control fruit diseases and insect pests. Although the effect is good, it is labor-intensive, time-consuming, and wasteful. The labor intensity is well known to fruit farmers. Sometimes missing the opportunity or slightly improper operation, bad weather such as wind and rain will cause bagging failure. Because of its high labor intensity and labor-intensive, time-consuming, and wasteful, it is less than 10% used in actual production. Most fruit farmers leave it to fate or desperately use a large amount of pesticides, resulting in poor fruit quality or excessive pesticide residues, endangering food safety and people's health, and the fruit surface is not clean, poor appearance, and is coldly received by customers.

[0003] In order to protect people's health and avoid the harm of pesticides, our Fruit and Vegetable Quality Research Institute adopts ecological film-making technology that takes into account the demands of fruit farmers. It has invented a diversified, multifunctional, efficient, green and non-toxic liquid physical copolymer film-forming polymer film that integrates yield increase, disease resistance, and film-making protection. After spraying or soaking fruits and vegetables, a breathable micro-film is formed on the surface of fruits and vegetables. The formed film has excellent extensibility, viscoelasticity, interfacial activity, acid and alkali resistance, abrasion resistance, natural air drying film formation, and adjustable film thickness. It can be widely used for spraying and coating protection of fruits and vegetables, similar to bagging, preventing fruit cracking, sunburn, foreign bacteria invasion, reducing fruit rust, reducing transpiration, drought resistance and moisture retention, blocking the center of disease, sealing the ringing of plants, scraping rot, pruning wounds, and moisturizing the grafting site. It is similar to biological bark, which can accelerate wound healing, prevent fruits and vegetables from freezing, prevent dry tips, enhance pesticide adhesion, delay the effective period of pesticides, resist rain erosion, and is also used for fruit and vegetable preservation and soil improvement. The advantages and effects of the present invention are:

[0004] 1. The composition contains a large amount of viscous liquid polymer physical copolymers made by crushing and ripening plant straw, and then undergoing the processes of purifying, liquefying and saccharifying. It has good film-forming properties, and the formed film has excellent adhesion, acid and alkali resistance, abrasion resistance, elongation, and strong interfacial activity. It can still maintain its unique functions under conditions of deep cold and high temperature exposure. It has a neutral PH value, and the liquid can be spray-dried into powder, and the powder can also be directly dissolved in cold water. The solution has high viscosity, strong adhesion, good emulsification, suspension stability, leveling and transparency. We use repeated rounds of technology to increase the permeability, flexibility, plasticity and moisture retention of the membrane. The membrane has air permeability, which is conducive to the release of carbon dioxide and ethylene and the exchange of a small amount of oxygen, which maintains moisture and maintains physiological balance. It can also enhance the effect of plant drought resistance and fruit and vegetable preservation. It has excellent performance in preventing fruit cracking, sunburn, invasion of foreign bacteria, reducing transpiration, resisting drought and moisturizing, and blocking the center of disease. It can be quickly dispersed in water by stirring and can be left standing for 24 hours without flocculation. After the solution is sprayed on the target, it quickly dries naturally to form a film. The film has excellent hydrophobic properties and is more resistant to rain erosion. It can be used to enhance the adhesion of pesticides, extend the effective period of pesticides, seal the ring barking, scraping rot, pruning wounds, and grafting sites to moisturize. It is shaped like biological bark and can accelerate the healing of plant wounds when used on plants.

[0005] 2. The composition can be specially added with the bioactive agent humic acid (HA). HA is a high molecular organic matter formed by a series of decomposition and synthesis of plant and animal residues by microorganisms, and its resources are abundant. HA is an organic carrier with good biological activity and multiple functional groups. It is also an intermediate substance with plant respiration and photosynthesis metabolism functions. Therefore, it has great tolerance and can be combined with a variety of substances. HA and pesticides are mainly combined through ionic bonds, hydrogen bonds, proton transfer, electron transfer, complexation and other interactions to generate a new type of pesticide polymer complex, which is the biological environmentally friendly pesticide. Research and practice have shown that HA can enhance the efficacy and reduce toxicity when combined with insecticides, fungicides and herbicides. Specifically, it is manifested as follows: solubilization effect: HA can act as a surfactant, and the surface tension of its metal salt is lower than that of water, which can produce obvious dispersing and emulsifying effects on pesticides and improve the solubility of soluble pesticides; synergistic effect: HA can enhance the absorption of pesticides by plants, improve the biological activity of pesticides and plant growth regulators, and significantly improve the effect of pesticides; sustained release effect: HA has a significant inhibitory effect on the decomposition rate of pesticides, and the greater the amount of HA used, the slower the rate; toxicity reduction effect: HA can passivate the activity of enzymes in organisms that are sensitive to pesticide toxicity, stimulate the activity of enzymes that have antagonistic effects on pesticides, and alleviate and reduce the toxicity of pesticides. Therefore, HA is an intermediate for various pesticides and fungicides, and has significant effects.

[0006] 3 The composition may also contain food-grade salicylic acid (willow bark is rich in SA) factors, which play a very important role in plant disease resistance. SA, as a signal molecule, regulates some important metabolic processes of plants, can induce plants to resist viruses, fungi and bacterial diseases, strengthen various rapid defense response mechanisms of plants, and improve plant disease resistance. For example:

[0007] After SA treatment, the activities of three enzymes in the system (PAL, POD, PPO) are all improved to varying degrees, which can make crops acquire disease resistance as a whole after being infected. By inhibiting the activity of plant cell wall degrading enzymes secreted by pathogens, the pathogenicity rate is reduced. After five days of treatment, the bacterial inhibition effect is most significant. Seven days after treatment, the content of PR-protein in plants is as high as 100ug / gFW, which is more than 1000 times that of untreated plants. Pathogens cannot survive in tissues with such a large amount of PR-protein. Exogenous SA can also be absorbed by the leaves, stems, flowers, and fruits of plants, and has a considerable conduction effect. It can promote fever in some plants, increase the temperature during flowering, and is beneficial to cold resistance and pollination during flowering; SA can inhibit transpiration and ethylene production, which is beneficial to drought resistance and flower and fruit preservation; SA can also promote the formation of adventitious roots, promote crop growth and increase chlorophyll, and increase crop yields. Since SA is a natural substance with no cumulative toxicity, an appropriate amount of exogenous SA can significantly enhance the disease resistance of plants. It not only reduces the use of toxic pesticides and environmental pollution, but also produces pollution-free high-quality fruits.

[0008] The object of the present invention is achieved by the following formulation.

[0009] Plant straw liquefied dry powder: 80-90%, humic acid HA: 5-20%, salicylic acid: 0.5-2%, sodium dehydroacetate (food grade organic preservative) 0.3-0.5%.

[0010] The specific embodiment of the present invention is as follows:

[0011] 1. The steps for preparing 1000 kg (KG) of the powder of the preparation.

[0012] 1. Southern fruit tree solution: Use a scale to weigh out the components of plant straw liquefied dry powder: 800 kg, humic acid HA: 192%, salicylic acid: 5 kg, and sodium dehydroacetate 3 kg.

[0013] 2. Northern fruit tree solution: Use a scale to weigh the components of plant straw liquefied dry powder: 900 kg, humic acid HA: 92%, salicylic acid: 5 kg, and sodium dehydroacetate 3 kg.

[0014] 2. Rapid production steps for preparing 1000 kg (KG) of the preparation liquid.

[0015] Take 200 kg of one of the two powders mentioned above and add it into a reactor filled with 800 kg of cold water. Stir thoroughly for liquefaction and pulping for 20 minutes, then heat the reactor. Raise the temperature to about 90 degrees and keep it warm for 30 minutes. Then take it out of the pot and let it stand for 24 hours. After filtering out the impurities at the bottom, filter and fill it into bottles of different specifications for later use.

[0016] The application method of the present invention is:

[0017] 1 When used for sealing plant ring barking, scraping rot, pruning wounds, and moisturizing grafting sites, take 1000g / bottle of the dilute viscous liquid and dilute it with 1 to 10 times of water or use it directly.

[0018] 2 When used for spraying coating on vegetables for protection, preventing fruit cracking, sunburn, foreign bacteria invasion, reducing transpiration, resisting drought and retaining moisture, preventing fruits and vegetables from freezing, preventing dry tips, enhancing pesticide adhesion, and extending the validity period of pesticides, it can be diluted with 10 to 1000 times of water as needed.

[0019] Evenly spray or soak the diluted liquid with water on the surface of fruits and vegetables with a sprayer to form a dense, flexible, slightly breathable plant liquid protective film. It produces better effects, such as reducing fruit cracking, sunburn, foreign bacteria invasion, reducing fruit rust, reducing transpiration, drought resistance and moisture retention, antifreeze and dry tip prevention of fruits and vegetables, and enhancing the adhesion of pesticides, etc., providing an ideal guarantee for the production of high-quality green AA-grade fruits and vegetables.

Claims

1. A high polymer film and a method for making the same, comprising the following components which are weighed in proportion, boiled, and mixed uniformly. It is characterized in that: their components and weight percentages are respectively: The object of the present invention is achieved by the following formulation. Plant straw liquefied dry powder: 80-90%, humic acid HA: 5-20%, salicylic acid: 0.5-2%, sodium dehydroacetate (food grade organic preservative) 0.3-0.5%. The specific embodiment of the present invention is as follows:

1. The steps for preparing 1000 kg (KG) of the powder of the preparation.

1. Southern fruit tree solution: Use a scale to weigh out the components of plant straw liquefied dry powder: 800 kg, humic acid HA: 192%, salicylic acid: 5 kg, and sodium dehydroacetate 3 kg.

2. Northern fruit tree solution: Use a scale to weigh the components of plant straw liquefied dry powder: 900 kg, humic acid HA: 92%, salicylic acid: 5 kg, and sodium dehydroacetate 3 kg.

2. Rapid production steps for preparing 1000 kg (KG) of the preparation liquid. Take 200 kg of one of the two powders mentioned above and add it into a reactor filled with 800 kg of cold water. Stir thoroughly for liquefaction and pulping for 20 minutes, then heat the reactor. Raise the temperature to about 90 degrees and keep it warm for 30 minutes. Then take it out of the pot and let it stand for 24 hours. After filtering out the impurities at the bottom, filter and fill it into bottles of different specifications for later use.