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[Chemical Knowledge]：What are the upstream raw materials of agricultural film? What do the downstream products contain?

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Agricultural film is a kind of plastic film used in agricultural production, which is usually used to cover the soil, protect crops and regulate the growth environment. In the field of raw materials for chemical production, the upstream and downstream related products of agricultural film mainly include the following aspects:

upstream raw materials:

1. polyethylene: polyethylene is one of the main raw materials of agricultural film, it is a thermoplastic, with excellent low temperature resistance, but poor high temperature resistance.
2. Polypropylene: Polypropylene is also one of the important raw materials of agricultural film. It has high heat resistance and mechanical strength, and is often used to make agricultural film that requires high temperature resistance.
3. Polyvinyl chloride: Polyvinyl chloride can also be used to make agricultural films, but it will release harmful vinyl chloride gas during use, so it is harmful to the environment.

Downstream related products:

1. Drip irrigation tape: Drip irrigation tape is an irrigation equipment used in conjunction with agricultural film. It can accurately drop water droplets on the roots of crops and improve irrigation efficiency.
2. Fertilizer: Agricultural film can be used in conjunction with fertilizer. By covering agricultural film, the volatilization and loss of fertilizer can be reduced and the utilization rate of fertilizer can be improved.
3. Seeds: Agricultural film can also be used in conjunction with seeds. By covering the agricultural film, the soil temperature and humidity can be increased, and the seeds can germinate and grow.

In short, the upstream and downstream related products of agricultural film cover many fields, including plastic raw materials, chemicals, agricultural equipment, etc. Understanding these related products will help to better understand the production and use process of agricultural film, as well as its important role in agricultural production.

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