Inorganic scattering agent master batch and agricultural film prepared therefrom

Abstract

This invention relates to the field of film resin technology, specifically to an inorganic scattering agent masterbatch and the agricultural film prepared therefrom. The inorganic scattering agent masterbatch is composed of the following raw materials by weight percentage: Iceland spar powder 73%, polymer powder surface treatment agent 1%, EVA resin 16%, polyethylene resin 9%, and POE resin 1%. The agricultural film prepared by adding the inorganic scattering agent masterbatch has a light transmittance of 91% and a haze of 75%. It is environmentally friendly and pollution-free, meeting the application requirements of scattering agricultural film in greenhouses in high-temperature and cold regions during winter. It can effectively solve problems such as excessive sun exposure in greenhouses and fruit shape distortion during the ripening period, achieving requirements such as cooling and uniform coloring, and meeting the needs of farmers to increase production and income.

Description

Technical Field

[0001] This invention relates to the field of film resin technology, specifically to an inorganic scattering agent masterbatch and the agricultural film prepared therefrom. Background Technology

[0002] With the widespread production and use of agricultural greenhouses across the country, the demand for agricultural films is increasing. Existing agricultural polyolefin films face the following technical challenges:

[0003] (1) First, in hot and humid regions, excessive sunlight can easily scorch crops and hinder their growth. The first technical challenge is how to reduce sunlight exposure to crops and lower greenhouse temperatures using agricultural film.

[0004] (2) Secondly, weak sunlight leads to weak photosynthesis, directly affecting the growth of crops inside the greenhouse and reducing the utilization rate of sunlight. During the growth and ripening stages of crops, the environment needs to provide uniform light so that each space in the greenhouse receives an appropriate amount of light to fully meet the needs of crop photosynthesis, resulting in a shorter crop production period, increased yield, uniform fruit color, and prevention of cracking and deformed fruit during ripening. How to provide uniform light for crops using agricultural film is the second technical challenge.

[0005] (3) In addition, ordinary agricultural polyolefin films are difficult to decompose or degrade under natural conditions. After agricultural polyolefin films are discarded, they remain in the soil, which will damage the soil structure, cause soil pollution, affect cultivation and crop growth, and reduce yield and quality. How to reduce the pollution to the ecological environment from an environmental protection perspective is the third technical challenge.

[0006] (4) The scattering agents used in the preparation of agricultural films, such as acrylic powder and silane powder, have high costs and the product's dispersibility and uniformity need to be improved. How to reduce the cost of agricultural films and improve the product's dispersibility and uniformity is the fourth technical challenge.

[0007] Farmers across the country have raised higher technical requirements for the functionality and comprehensive performance of agricultural films during practical applications. Therefore, there is an urgent need to develop agricultural films that can solve the above-mentioned technical difficulties and truly meet the needs of farmers in actual planting. Summary of the Invention

[0008] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide an inorganic scattering agent masterbatch and the agricultural film prepared therefrom.

[0009] The objective of this invention is achieved through the following technical solution: an inorganic scattering agent masterbatch, which is composed of the following raw materials in weight percentages:

[0010]

[0011] Preferably, an inorganic scattering agent masterbatch is composed of the following raw materials in weight percentages:

[0012]

[0013] Preferably, an inorganic scattering agent masterbatch is composed of the following raw materials in weight percentages:

[0014]

[0015] Preferably, the polymer powder surface treatment agent is composed of the following raw materials in weight percentage: 8%-12% distearate, 8%-10% butyl stearate, 15%-20% glyceryl monostearate, 55%-65% fatty acid glycerides, and 2%-3% antioxidant.

[0016] The polymer powder surface treatment agent added in this invention is a composite liposome surface treatment agent as described in invention patent CN104086805B. After appropriate adjustment of the component ratio, Iceland spar powder is coated with a coating rate of 99% and a coating amount of 1%, ensuring no precipitation. The composite liposome surface treatment agent improves the surface polarity of Iceland spar powder, resulting in good compatibility between Iceland spar powder and EVA resin, polyethylene resin, and POE resin. By combining the different longitudinal and transverse properties of EVA resin, polyethylene resin, and POE resin, a high-performance inorganic scattering agent masterbatch is obtained.

[0017] Preferably, the inorganic scattering agent masterbatch has a melt flow rate of 1.6 g / 10 min and a density of 1.77 g / cm³.

[0018] A method for preparing an inorganic scattering agent masterbatch includes the following steps:

[0019] (1) The above-mentioned polymeric composite grease powder surface treatment agent and Iceland spar powder are put into a high-speed mixer, and the polymeric composite grease powder surface treatment agent is used to treat the Iceland spar powder.

[0020] (2) EVA resin, polyethylene resin and POE resin are put into a high-speed mixer for mixing and decomposition, and then granulated by a screw extruder to obtain the inorganic scattering agent masterbatch.

[0021] An agricultural film is prepared from the aforementioned inorganic scattering agent masterbatch.

[0022] Preferably, the agricultural film has a light transmittance of 91% and a haze of 75%.

[0023] Preferably, the agricultural film is uniformly dispersed under infrared light.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The inorganic scattering agent masterbatch of the present invention is made of more than 70% pure inorganic Iceland spar powder, which is environmentally friendly and pollution-free, reducing the pollution to the ecological environment.

[0026] 2. Agricultural films prepared using the inorganic scattering agent masterbatch of this invention have a light transmittance of up to 91%, a haze of 75%, and uniform scattering, exhibiting characteristics of high light transmittance, uniform light distribution, and full-area coverage. The agricultural film contains numerous uniformly spaced scattering media with varying refractive indices. When parallel sunlight reaches the surface of the agricultural film, the scattering media activates, creating multi-angle refraction and multi-point scattering to achieve a shadowless lamp effect. Some light can bypass obstacles such as greenhouse frames and leaves to reach different parts of the crop. While ensuring the light transmittance of the agricultural film, the scattered light pattern is more suitable for high-temperature, high-density cultivation environments.

[0027] When applied to greenhouse cultivation, sunlight passing through the agricultural film of this invention forms multi-point diffuse scattering, converting direct sunlight into diffused light, improving the uniformity of light inside the greenhouse, increasing the light-receiving area of ​​crops, making the light "softer," reducing the scorching of crop leaves and fruits by strong light, reducing fruit cracking, and lowering the temperature inside the greenhouse during periods of strong light.

[0028] In situations with weak sunlight, the agricultural film of this invention provides uniform illumination by evenly dispersing and scattering light, ensuring that each space in the greenhouse receives an appropriate amount of light. This provides uniform light during the crop growth and fruit ripening periods, allowing all angles within the greenhouse to receive adequate light, meeting the needs of crop photosynthesis, shortening the crop growth period, increasing yield, and producing uniform fruit color, thus effectively improving farmers' planting efficiency.

[0029] The agricultural film of this invention meets the application needs of greenhouse scattering film in high-temperature and cold regions during winter. In northern regions, it can significantly increase greenhouse temperature by 2℃-3℃ in winter. Feedback from experiments in greenhouses of high-value crops such as flowers in Yunnan, tomatoes in Ningxia, cucumbers in Shouguang, nectarines in Dalian, and strawberries in Qingdao shows that it can effectively solve problems such as excessive sun exposure in greenhouses and fruit shape distortion during ripening, achieving requirements such as cooling and uniform coloring, thus meeting the needs of farmers to increase production and income.

[0030] Furthermore, over 70% of the inorganic scattering agent masterbatch of this invention uses Iceland spar powder, a widely available raw material. Compared to scattering agents prepared using acrylic powder and silane powder in the prior art, the price of the inorganic scattering agent masterbatch is approximately 1 / 20th that of traditional scattering agents, significantly reducing the cost of raw materials for agricultural films.

[0031] Instruction manual illustrations

[0032] Figure 1 This is a static image of the agricultural film of the present invention under infrared spectrum. Detailed Implementation

[0033] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments. The content mentioned in the embodiments is not intended to limit the present invention.

[0034] Example 1

[0035] An inorganic scattering agent masterbatch is composed of the following raw materials in weight percentage: Iceland spar powder 73%, polymer powder surface treatment agent 1%, EVA resin 16%, polyethylene resin 9%, and POE resin 1%.

[0036] The polymer powder surface treatment agent is composed of the following raw materials by weight percentage: 6% distearyloxyisopropoxyaluminate, 11% butyl stearate, 18% glyceryl monostearate, 60% fatty acid glycerides, and 5% antioxidant.

[0037] A method for preparing an inorganic scattering agent masterbatch includes the following steps:

[0038] (1) The above-mentioned polymeric composite grease powder surface treatment agent and Iceland spar powder are put into a high-speed mixer, and the polymeric composite grease powder surface treatment agent is used to treat the Iceland spar powder.

[0039] (2) EVA resin, polyethylene resin and POE resin are put into a high-speed mixer for mixing and decomposition, and then granulated by a screw extruder to obtain the inorganic scattering agent masterbatch.

[0040] An agricultural film, prepared by adding the aforementioned inorganic scattering agent masterbatch, exhibits a light transmittance of 91% and a haze of 75%. (Combined with...) Figure 1 The static image of the agricultural film of the present invention under infrared spectrum shows that the agricultural film is uniformly dispersed under infrared spectrum.

[0041] Example 2

[0042] An inorganic scattering agent masterbatch is composed of the following raw materials in weight percentage: Iceland spar powder 70%, polymer powder surface treatment agent 3%, EVA resin 18%, polyethylene resin 7%, and POE resin 2%.

[0043] The polymer powder surface treatment agent is composed of the following raw materials by weight percentage: 8% distearate, 13% butyl stearate, 20% glyceryl monostearate, 56% fatty acid glycerides, and 3% antioxidant.

[0044] The preparation method of the inorganic scattering agent masterbatch in this embodiment is the same as that in Example 1.

[0045] An agricultural film is prepared by adding the above-mentioned inorganic scattering agent masterbatch. The agricultural film has a light transmittance of 91%, a haze of 75%, and is uniformly dispersed under infrared spectroscopy.

[0046] Example 3

[0047] An inorganic scattering agent masterbatch is composed of the following raw materials in weight percentage: Iceland spar powder 75%, polymer powder surface treatment agent 1%, EVA resin 15%, polyethylene resin 8%, and POE resin 1%.

[0048] The polymer powder surface treatment agent is composed of the following raw materials by weight percentage: 10% distearyloxyisopropoxyaluminate, 10% butyl stearate, 12% glyceryl monostearate, 65% fatty acid glycerides, and 3% antioxidant.

[0049] The preparation method of the inorganic scattering agent masterbatch in this embodiment is the same as that in Example 1.

[0050] An agricultural film is prepared by adding the above-mentioned inorganic scattering agent masterbatch. The agricultural film has a light transmittance of 91%, a haze of 75%, and is uniformly dispersed under infrared spectroscopy.

[0051] Example 4

[0052] An inorganic scattering agent masterbatch is composed of the following raw materials in weight percentage: Iceland spar powder 72%, polymer powder surface treatment agent 3%, EVA resin 12%, polyethylene resin 10%, and POE resin 3%.

[0053] The polymer powder surface treatment agent is composed of the following raw materials by weight percentage: 11% distearyloxyisopropoxyaluminate, 12% butyl stearate, 15% glyceryl monostearate, 58% fatty acid glycerides, and 4% antioxidant.

[0054] The preparation method of the inorganic scattering agent masterbatch in this embodiment is the same as that in Example 1.

[0055] An agricultural film is prepared by adding the above-mentioned inorganic scattering agent masterbatch. The agricultural film has a light transmittance of 91%, a haze of 75%, and is uniformly dispersed under infrared spectroscopy.

[0056] Example 5

[0057] An inorganic scattering agent masterbatch is composed of the following raw materials in weight percentage: Iceland spar powder 74%, polymer powder surface treatment agent 2%, EVA resin 17%, polyethylene resin 5%, and POE resin 2%.

[0058] The polymer powder surface treatment agent is composed of the following raw materials by weight percentage: 12% distearate, 10% butyl stearate, 20% glyceryl monostearate, 55% fatty acid glycerides, and 3% antioxidant.

[0059] The preparation method of the inorganic scattering agent masterbatch in this embodiment is the same as that in Example 1.

[0060] An agricultural film is prepared by adding the above-mentioned inorganic scattering agent masterbatch. The agricultural film has a light transmittance of 91%, a haze of 75%, and is uniformly dispersed under infrared spectroscopy.

[0061] The inorganic scattering agent masterbatch of Example 3 was subjected to performance testing. The test indicators, standards, and results are as follows:

[0062]

[0063] Taking PE agricultural film as an example, 7% by weight of the inorganic scattering agent masterbatch of the present invention is added to 93% PE, and PE agricultural film is produced by co-extrusion blown film machine. According to GB / T2410-2008, the light transmittance of PE agricultural film is 91% and the haze is 75%.

[0064] Through comparative experiments, agricultural films prepared with the inorganic scattering agent masterbatch of this invention showed that, compared with commercially available PE films, the number of fruits increased by more than 12.52% and the yield increased by more than 21.19%. Compared with commercially available EVA films, the ripening period was advanced by 10-20 days, and the fruit shape and color were better. When applied to strawberry cultivation, it improved the fruit yield of strawberries, and the color and ripeness of all parts of the strawberries were uniform.

[0065] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. An inorganic scattering agent masterbatch, characterized in that: It is composed of the following raw materials by weight percentage: Iceland spar powder 70%-75% Polymer powder surface treatment agent 1%-3% EVA resin 12%-18% Polyethylene resin 5%-10% POE resin 1%-3%; The melt flow rate of the inorganic scattering agent master batch is 1.6 g / 10 min, and the density is 1.77 g / cm 3 ; The polymer powder surface treatment agent is composed of the following raw materials in weight percentage: 6%-12% distearate, 10%-13% butyl stearate, 12%-22% glyceryl monostearate, 55%-65% fatty acid glycerides, and 3%-5% antioxidant.

2. The inorganic scattering agent masterbatch according to claim 1, characterized in that: It is composed of the following raw materials by weight percentage: Iceland spar powder 73%-75% Polymer powder surface treatment agent 1%-1.5% EVA resin 12%-15% Polyethylene resin 5%-8% POE resin 1%-2%.

3. The inorganic scattering agent masterbatch according to claim 1, characterized in that: It is composed of the following raw materials by weight percentage: Iceland spar powder 75% 1% Polymer Powder Surface Treatment Agent 15% EVA resin 8% polyethylene resin POE resin 1%.

4. A method for preparing an inorganic scattering agent masterbatch according to any one of claims 1-3, characterized in that: Includes the following steps: (1) The above-mentioned polymeric composite powder surface treatment agent and Iceland spar powder are put into a high-speed mixer, and the polymeric composite powder surface treatment agent is used to treat the Iceland spar powder. (2) EVA resin, polyethylene resin and POE resin are put into a high-speed mixer for mixing and decomposition, and then granulated by a screw extruder to obtain the inorganic scattering agent masterbatch.

5. An agricultural film, characterized in that: It is prepared by adding the inorganic scattering agent masterbatch of any one of claims 1-3 or by adding the inorganic scattering agent masterbatch obtained by the method of claim 4.

6. The agricultural film according to claim 5, characterized in that: The agricultural film has a light transmittance of 91% and a haze of 75%.

7. The agricultural film according to claim 5, characterized in that: The agricultural film is uniformly dispersed under infrared light.

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