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Characteristics of rigid polyurethane foam made of polyurethane raw material
Rigid polyurethane foam is foam molding, spraying machine construction, convenient operation, can also spray casting, can in any complex roof construction, construction is usually operated by 3-4, every day can be sprayed more than 20 cubic meters, according to the calculation of coating thickness is 30 mm, every day can be sprayed about more than 700 square meters, improve ten times more than the traditional material laying efficiency, but also reduces the labor intensity, improve the working environment, reducing the pollution of the environment. Pu hard foam liquid material at site foaming expansion volume is 15-18 times, so the raw material transport volume is small. According to the statistics of vehicle transportation cost by more than 80% less than the use of traditional materials in the construction site, also greatly reduced the workload of vertical transportation team.
What material do you need for plastic film? Do you use this material?
In addition, the bag color and performance requirements are not high, you can choose recycled polyethylene. Plastic can be recycled, because of the repeated use of processing, non-toxic, tasteless new plastic become cloudy, less than the original hygiene and color requirements. But this plastic bag is made from recycled material, which is environmentally friendly, and the price is 10% to 50% lower than that of the new material bag
Low pressure plastic raw materials in the process of blowing the two sides of the fold, how to deal with?
Blow up ratio of transverse expansion ratio of the film, is actually on the orientation of the transverse tensile film, tension will have a certain degree of plastic molecules, the blowing ratio is increased, thereby improve the lateral strength of thin films.
What are the raw materials of foam plastics and how do they come out?
The foaming agents for epoxy resins are two types: physical foaming agents and chemical foaming agents. Physical foaming agents are mainly low boiling liquid, such as three chloro methane (F11), three chlorine, three fluorine ethane (F112), two chlorine, two fluorine methane (F12) and so on. By using the curing heat of the epoxy resin, the liquid with low boiling point is evaporated, and the gas is released, and the products are small in density and low in thermal conductivity. But fluorine hydrocarbons have a damaging effect on the atmosphere and are often used to spray foaming processes. According to the experts of China epoxy resin industry association, toluene and so on can be used as auxiliary foaming agent. In addition to foaming, it also acts as a curing reaction, a heat absorber and a diluent.
What is the raw material used in the production of plastic products?
Common mineral water bottles and carbonated beverage bottles are made of this kind of material which can not be recycled or hot water. Its heat-resistant temperature is only 70 degrees, only suitable for warm drinks or cold drinks, high temperature liquid or heating, easy to deformation, will dissolve the harmful substances. The scientists also found that the plastic could release carcinogens in 10 months. Therefore, when the beverage bottle is used up, it should be thrown away. It should not be used as a drinking cup or used as a storage container to hold other foods, so as not to cause health problems.
Chemical, plastic raw materials, plastic raw materials how sub grade?
Plastic bucket is usually added to the resin, in the production of lubricants, plasticizers, dispersant, pigment, polyethylene wax, and these materials good variety, price range, and some high melting point, good whiteness, production out of the finished product is good texture, high brightness, good conscience manufacturers add some heat thermoplastic elastomer, feel very well; and a point of the raw materials, the relative performance is low, the production of plastic barrels must be of poor quality.
That kind of plastic bottle blows well
PETA hard, tough, high strength, bright surface with transparent and multi colored sheets. The disadvantage is PET high frequency synthesis is difficult, the price is a bit more expensive than PVC, this material is often high-grade products and environmental requirements of the user to replace the PVC PET material generally used to make packaging for food, beverage, pharmaceutical plastic bottles.
What are the plastic raw materials?
Plastic raw material is a kind of polymer (polymer), also known as macromolecule or macromolecule, also is commonly known as plastic or resin. The so-called plastic raw material, in fact, it is a kind of [synthetic resin], the shape of the natural resin [pine resin] similar, but because of the chemical strength of the synthesis, and is called plastic.