What is LDPE?

Low density polyethylene (LDPE) is a kind of thermoplastic, which can soften into liquid when heated and freeze when cooled It is processed from oil Because of its toughness and low reactivity at room temperature, LDPE is widely used LDPE is an important plastic, which is the main component of many products, including plastic bags, food and beverage containers, disk drive trays and other computer equipment It's flexible, easy to weld and shape, and flexible enough to be almost unbreakable These advantages make it a choice of components that require flexibility to function properly The elasticity of LDPE comes from its chemical structure Like other polymers, LDPE consists of repeating units of carbon and hydrogen atoms that form chains Low density polyethylene shows about two percent of its carbon atoms, which means that in some cases, the hydrogen atom is replaced by another hydrocarbon chain This makes the tensile strength and intermolecular force of LDPE weaker, resulting in lower density and better elasticity Linear low density polyethylene (LLDPE) is a kind of low density polyethylene widely used in commercial and industrial applications It is composed of shorter branch structure than LDPE, so it has lower viscosity and tensile capacity Linear LDPE is used in plastic packaging and bags that require thinner and more malleable than LDPE Low density polyethylene is widely used in laboratory equipment Its elasticity and translucency make it suitable for bottle washing and tubing, and its chemical resistance also allows it to be used with chemicals that corrode other materials For example, LDPE has good anti acid, alkali, alcohol, aldehyde and vegetable oil properties Laboratory equipment manufacturers claim that LDPE can be used at temperatures above 80 ° C and minus 50 ° C It is recommended to pay special attention to the maintenance of LDPE equipment, because this material can be weakened by oxidant, and will soften and expand after a period of time Low density polyethylene was first developed as a variety of high density polyethylene (HDPE) HDPE has fewer branches of hydrocarbon chain, so it is a harder material than LDPE It is also used to make plastic bags and the same products as LDPE, but it can also be used to make harder materials such as milk cans and bottle caps Since the middle of the 20th century, the global market of LDPE and LLDPE has developed rapidly Although polymer science continues to develop new materials to meet the challenges of packaging and production, low-density polyethylene (LDPE) has always been a popular material because of its versatility and durability Low degree polyethylene can be recycled, so it is a popular material in today's society with increasing environmental awareness.