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[Chemical Knowledge]：Production and manufacturing method and process of agricultural film

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The manufacturing method
of agricultural film
1. Introduction

agricultural film is an important plastic product used in agricultural production, mainly to improve soil temperature, maintain soil moisture, inhibit the growth of weeds and so on. In the field of chemical production raw materials, the manufacture of agricultural film involves polymer chemistry, plastic processing and other technologies. This article will introduce the manufacturing method of agricultural film in detail.

2. raw material selection

the main raw material of agricultural film is plastic, commonly used polyethylene, polypropylene and so on. These materials have excellent weather resistance, aging resistance, mechanical properties, etc., and are suitable for the production of agricultural films.

3. ingredients and mixing

In order to improve the performance of agricultural film, it is necessary to add some auxiliary materials, such as antioxidants, ultraviolet absorbers, lubricants, etc. These additives need to be mixed with the main material to ensure that they are evenly distributed in the agricultural film. The mixing process is generally carried out by an internal mixer or an open mixer.

4. extrusion molding

mixed material through the extruder extrusion molding, forming the preliminary shape of the agricultural film. During the extrusion process, it is necessary to control parameters such as temperature and pressure to ensure product quality and output.

5. Stretching and orientation

The extruded agricultural film needs to be stretched and oriented to improve its mechanical and optical properties. The stretching can be carried out by means of flat film stretching or tubular stretching, and the orientation is to arrange the polymer chains along the stretching direction during the stretching process.

6. cooling and winding

after stretching orientation of agricultural film needs to be cooled to ensure the stability of its shape and performance. Cooling is generally air-cooled or water-cooled. The cooled agricultural film is wound to obtain the final agricultural film product.

7. quality control and testing

In order to ensure the quality of agricultural film, it is necessary to carry out strict quality control and testing. Common test items include thickness, strength, light transmittance, etc. For unqualified products, rework or scrap is required.

8. environmental protection and sustainable development

the production process of agricultural film will produce certain wastes and pollutants, so environmental protection treatment is needed. At the same time, in order to meet the requirements of sustainable development, it is necessary to use environmentally friendly and recyclable raw materials and processes to reduce the impact on the environment.

9. conclusion The manufacturing method of

agricultural film involves many links and technologies, and it is necessary to strictly control the process parameters and quality indicators of each link to ensure the quality and performance of the final product. At the same time, we also need to pay attention to environmental protection and sustainable development, and promote the green and efficient production of agricultural film.

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