Linear low-density polyethylene LLDPE (1018M) is white powder/granular, tasteless and odorless, with a density of 0.918~0.935g/cm3. Linear low-density polyethylene (LLDPE) is a molecular structure formed by the copolymerization of ethylene and a small amount of α-olefin on the main chain of linear ethylene, with very short comonomer branches. Compared with LDPE, it has higher softening temperature and melting temperature, it has the advantages of high strength, good toughness, high rigidity, heat resistance, and good cold resistance. It also has good resistance to environmental stress cracking, impact strength, tear resistance, etc., and is acid and alkali resistant. , organic solvents, etc. and are used in fields such as industry, agriculture, medicine, health and daily necessities.
The specific applications and characteristic advantages of linear low-density polyethylene LLDPE (1018M) are as follows:
LLDPE has penetrated into most traditional markets of polyethylene. Including film, molding, tubing and wire and cable. Anti-leakage mulch film is a newly developed LLDPE market. Mulch, a large extruded sheet used as a liner for landfills and waste ponds to prevent leakage or contamination of surrounding areas.
Some of the film markets for LLDPE, such as the production of bags, garbage bags, elastomeric packaging, industrial liners, towel liners and shopping bags, utilize this resin with improved strength and toughness. advantage. Transparent film. Penetration resistance and stiffness of LDPE films without significantly affecting film transparency. Injection molding and rotational molding are the two largest molding applications for LLDPE. This resin’s superior toughness, low temperature, and impact strength are theoretically suitable for waste bins, toys, and refrigerated appliances. In addition, LLDPE’s high resistance to environmental stress cracking makes it suitable for injection molding of molded lids that come into contact with oily foods, rotational molding of waste containers, fuel tanks and chemical tanks. There is a smaller market for pipe and wire and cable coatings where the high burst strength and environmental stress cracking resistance provided by LLDPE can meet the requirements. 65%~70% of LLDPE is used to make films.
The LLDPE polymer generated during the copolymerization process has a narrower molecular weight distribution than general LDPE, and also has a linear structure that gives it different rheological properties. The melt flow characteristics of LLDPE adapt to the requirements of new processes, especially the film extrusion process, which can produce high-quality LLDPE products. LLDPE is used in all traditional markets of polyethylene to enhance stretch, penetration, impact and tear resistance. Its excellent resistance to environmental stress cracking, low temperature impact and warpage make LLDPE attractive for pipe, sheet extrusion and all molding applications. The latest application of LLDPE is as a lining film for waste landfills and waste liquid ponds.
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