Application and use of low density polyethylene

The biggest market for LDPE is the production of films. The single and composite LDPE films produced by the blow molding or casting process account for more than 55% of the total domestic consumption of LDPE. Films made from LDPE exhibit good optical properties, strength, flexibility, sealing, and slow odor diffusivity and chemical stability. LDPE is used to package bread, agricultural products, fast food, textiles, durable consumer goods and some industrial products. LDPE can also be used as a non-packaging film such as disposable diapers, agricultural films and shrink films.

Squeeze the glue. It is another major market for LDPE. Due to the structural characteristics of the LDPE molecule, it is the only resin in the family of polyethylene resins that can meet the requirements of the extrusion coating process. The adhesive provides a protective layer that helps seal the finished package, with excellent tensile properties, long-lasting coverage and low odor diffusing. Typical melt indices range from 3 to 15 grams per 1 minute.

LDPE adhesives can be applied to many substrates such as paper, board, fabric and other polymeric materials. LDPE coating is an economical and effective means to ensure the heat sealing and moisture resistance of the substrate. The market for LDPE toppings is a milky box, sterile antiseptic package, food packaging, tape and paper products.

LDPE coextrusion is widely used as a component of high barrier composite laminates. The important requirements are moisture protection and sealing. The performance of the resin will vary depending on the requirements. It can be used for aseptic packaging, packaging of pharmaceuticals and daily necessities, and molding. In the competition of the polyethylene resin family, blow molding and injection molding have been relatively stable using conventional LDPE, and LDPE resin has been used for molding due to its flexural resistance and processing characteristics.