This may be affected by news of a vinyl chloride leak in Ohio, USA. Customers know that our products are made from polyethylene raw materials. Therefore, more and more WeChat calls and inquiries about whether they have a potential security risk are coming in. Therefore, company asked at night This article is written so that you know difference between polyethylene and vinyl chloride.
Plastic pallets, return boxes, trash cans, water tanks, dispensers and other products produced by Chongqing Zhengmao Environmental Protection Technology Co., Ltd. are generally made of high density polyethylene (HDPE) and linear low density polyethylene ( LLDPE) It is processed by injection molding and rotational molding as main raw material.
News overview. According to CCTV news, on February 3, a train carrying toxic chemicals derailed in East Palestine, Ohio. The train included 141 wagons, of which 50 derailed, and 10 wagons were loaded with pesticides. . On February 4 local time, U.S. officials confirmed that accident had leaked a small amount of dangerous chemical vinyl chloride.
What is vinyl chloride:
Vinyl chloride, also known as vinyl chloride, has chemical formula C2H3Cl. It is an organic compound and an important monomer in polymer chemical industry. Appearance - colorless gas with smell of ether, slightly soluble in water, soluble in most organic solvents such as ethanol, ether, acetone, benzene, etc., melting point: -153.8 ° C, boiling point: -13.4 °С; It is a flammable, explosive toxic substance that, when mixed with air, can form explosive mixtures. When exposed to heat sources and open flames, there is a risk of fire and explosion; On October 27, 2017, list of carcinogens published by International Agency for Research on Cancer of World Health Organization originally compiled for reference, Vinyl chloride is on list of class 1 carcinogens.
The dangers of vinyl chloride:
Vinyl chloride has a half-life of up to 8 years, meaning that contaminated soil can be unusable for decades. If it seeps into groundwater, it will directly affect basic life of surrounding residents. Vinyl chloride can cause damage to exposed skin and respiratory tract, as well as to eyes, and can cause frostbite if a person's skin comes into contact with liquid. However, if liquid vinyl chloride evaporates and is inhaled by humans, it causes nerve-irritating symptoms such as blurred vision, drowsiness, and dizziness. Inhalation of higher concentrations of vinyl chloride gas can cause death. But interestingly, when vinyl chloride reaches a certain concentration, it gives a very pleasant sweet taste.
Plastic storage tank
What is high density polyethylene (HDPE):
High density polyethylene (HDPE), white powder or granular product. Non-toxic, tasteless, crystallinity 80% to 90%, softening point 125 to 135°C, working temperature up to 100°C, hardness, tensile strength and creep worse than low density polyethylene, wear resistance, electrical Good insulation, toughness and frost resistance; good chemical resistance, insoluble in any organic solvents at room temperature, corrosion-resistant to acids, alkalis and various salts; film has low vapor permeability and air permeability, low water absorption; poor aging resistance, environmental stress cracking resistance is not as good as low density polyethylene, especially thermal oxidation will reduce its performance, so antioxidants and UV absorbers must be added to resin to overcome this disadvantage.
Properties of high density polyethylene:
Acid and alkali resistance, resistance to organic solvents, excellent electrical insulation, and can also maintain a certain degree of impact strength at low temperatures. Surface hardness, tensile strength, rigidity and other mechanical strength is higher than LDPE, close to PP, harder than PP, dielectric properties, environmental stress crack resistance is also better. Hardness, tensile strength and creep are better than low density polyethylene; wear resistance, electrical insulation, toughness and frost resistance are better, but somewhat worse than low-density insulation; chemical resistance is good, at room temperature under certain conditions it is insoluble in any organic solvents and is resistant to acids, alkalis and various salts.
HDPE products are widely used in various types of containers, industrial accessories, medical supplies, toys, casings, bottle caps and shields. Blow molding can be used to form various hollow containers, ultra-thin films, etc. Extrusion can be used to make pipes, elastic bands, straps, monofilament, wire and cable jackets, and more. In addition, it can also form architectural decorative panels, shutters, synthetic wood, synthetic paper, synthetic film, and calcium plastic products.
What is linear low density polyethylene (LLDPE):
Linear low density polyethylene is a non-toxic, tasteless and odorless milky white particles with a density of 0.918~0.935g/cm3. Compared with LDPE, it has a higher softening point and melting point, and has advantages of high strength, good toughness, high rigidity, heat resistance and cold resistance, and good environmental stress crack resistance, toughness and durability. Tear strength and other properties, as well as resistance to acids, alkalis, organic solvents, etc., so they are widely used in fields of industry, agriculture, medicine, hygiene and daily needs.
Linear low density polyethylene characteristics:
In addition to properties of conventional polyolefin resins, LLDPE has excellent tensile strength, tear strength, environmental stress crack resistance, low temperature resistance, heat resistance and puncture resistance.
LDPE products are widely used in anti-leakage films, films, bags, garbage bags, elastic packaging, industrial grommets, towel grommets, moldings, pipes, wires and cables, trash cans, toys and refrigeration equipment, molded products. lids in contact with oily food, rotomolded containers, fuel and chemical tanks, etc.