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December
The foam box is a box type packing container made of foam plastic (multi hollow plastic), and the plastic foam is a plastic with many tiny pores inside. EPS foamed plastic is a lightweight material made of foam material, which is made up of polystyrene resin, foaming agent and other auxiliary materials. It is an indispensable heat preservation and preservation material for seafood freezing, vegetable preservation, cold storage, railway passenger car and so on.
Styrene is a kind of chemical raw material, which is mainly used in home decoration and leather making. It has strong toxicity and great harm to human body. Its toxicity is reflected in direct and indirect, direct is acute poisoning. Its toxic substances will cause strong stimulation to the mucous membrane of patients, and even cause poisoning fainting and other serious situations. Indirect poisoning refers to slow Sex poisoning, harm is also very big, with a strong carcinogenicity
The main factor of using materials in home decoration is environmental protection, which does not contain harmful substances, does not emit harmful gases, and even has the performance of food contact level. So you can use it safely on household products. The common household products made of EPS foam equipment are floor mats, made of waterproof, abrasion resistant materials, and are very easy to clean, allowing children to play at home.
The temperature distribution of building exterior wall is obviously affected by solar radiation, and its influence degree is closely related to season and orientation. In summer, the peak temperature of the west wall is the highest, and the temperature fluctuation is large; in winter, the surface temperature of the south wall is highest, and the temperature fluctuation is large; in all seasons, the average temperature of the north wall is low, and the temperature fluctuation is small; the wall temperature in spring and autumn is between winter and summer.
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