Q:What kind of material is plastic film?

Plastic film: a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins, used for packaging and as a coating. Plastic packaging and plastic packaging products market share was growing, especially the composite plastic packaging, has been widely used in food, medicine, chemical and other fields, especially in food packaging accounted for the largest proportion, such as beverage packaging, frozen food packaging, food packaging, food packaging, food cooking. These products have brought great convenience to people's life.

Q:Several forming methods of plastic film and their advantages and disadvantages are summarized

Tape casting, blown film and calendering, the physical properties of cast films are better than blown films.

Q:What is the raw material of agricultural film?

Agricultural film raw material is HDPE, commonly known as low pressure, buy this kind of raw material, the most important to see your demand, if the amount of big, you can directly find petrochemical agents.

Q:Why should farmers cover plastic film when sowing in the spring?

1. warming up and promoting the decomposition and release of soil nutrients2. moisturizing, improve the survival rateSoil moisture, except irrigation, mainly comes from rainfall. After covering the membrane, on the one hand, because of the barrier of plastic film, the evaporation of soil water is reduced and the dissipation is slow; and the water drops formed in the membrane and then fall into the soil table, thereby reducing the loss of soil moisture and protecting soil moisture. On the other hand, the film can also be in the excessive rainfall, prevent the rain poured into the ridge, can play the role of waterlogging.3. promote growth and developmentThe application of plastic film mulching increased soil temperature and humidity, which was beneficial to early growth and rapid growth, and promoted the growth and development of plants. The growth period of plastic mulch is shortened to about one week.

Q:What are the plastic film types and scope of use?

PVA coated high barrier film is a strong barrier gas material, and thermal suture, moisture barrier strong polyolefin composite, is a multilayer structure of the film. PVA coating high barrier film, nano layered silicate modified PVA coating on polyethylene film, after printing and composite, the oxygen resistance rate is less than 2cm3/ (M2 ? 24h ? 0.1MPa). The barrier properties are superior to those of EVOH five layer coextrusion film, and the packaging cost is greatly reduced, which can not only ensure the packaging requirements for aseptic packaging all the quality, but also greatly reduces the cost of aseptic packaging of food processing enterprises, solve the technical bottleneck of the three layer coextrusion poor barrier properties of polyethylene packaging film. Can be used for packing beverage, fruit juice, milk, soy sauce, vinegar etc..

Q:What is a water-soluble plastic packing film?

Water soluble plastic packaging film as a new green packaging materials. The main raw material is low alcoholysis of polyvinyl alcohol film, water solubility and degradability by polyvinyl alcohol, adding various additives, such as surfactants, plasticizers, anti adhesive agent. Water soluble film products belong to green packaging materials and in Europe, Japan and other countries have been recognized by the national environmental protection department. At present, the main domestic and foreign biological oxygen demand (BOD) and chemical oxygen demand (COD) as an environmental indicator. The Japanese authorities determination of PVA biological oxygen demand (BOD) is much smaller than the starch, the United States Air Products to PVA biological products Airvol, after 5 days degradation can be measured the amount of BOD is lower than the initial volume of BOD 1%. through the biological experiment proved that polyvinyl alcohol are non-toxic, does not prevent the growth of microorganisms, has no influence on wastewater treatment and environmental health The microbial decomposition tests also showed that the PVA was almost completely decomposed, resulting in a very low COD

Q:How much is plastic waste film?

In addition, this is mainly sold according to tons, probably thousands of dollars / ton, specifically to see the market, if in accordance with the Jin count, it is probably a few cents a pound, and now waste prices are generally not too high.

Q:How to choose the plastic film for the salt packing bag?

Well, there are two parts in your retail package. One is the inner package which is directly contacted with the salt, and the other is an outer package containing "inner packing + measuring spoon" - retail packaging? Of course, the specific design ideas you can open wider, but do not limit their thinking......

Q:What is the melting point of PET plastic film?

PET plastic is the abbreviation of Polyethylene terephthalate in English, referred to as PET or PETP. Polybutylene terephthalate mainly consists of polyethylene terephthalate, two ester PET and polybutylene terephthalate two PBT. Polyethylene terephthalate is also commonly called polyester resin. It is a condensation of terephthalic acid with ethylene glycol and is collectively referred to as thermoplastic polyester, or saturated polyester, with PBT.

Q:How many kinds of plastic film specifications are there in the greenhouse?

In order to adapt to the various aspects of agricultural production, agricultural plastic film has a variety of different varieties and specifications. According to the use of plastic raw materials, divided into PVC plastic film and polyethylene plastic film;. According to a method of manufacturing a plastic film, divided into pressure Ting film, blown film; according to some special properties of plastic film there were no film, seedling, drop film, film, thin film, colored cover wide film, packaging film etc. according to the different width and thickness of the plastic film, there are a variety of different specifications.