Linear low density polyethylene (LLDPE) is characterized by chemical resistance and stability to cracking, puncture, tearing, its surface is distinguished by high gloss. It is similar in structure to high-pressure performance polyethylene.
Linear low density polyethylene is characterized by a higher tensile strength and higher breaking extension values. At the same time, linear high-pressure performance polyethylene has a higher melting point and can be used for prepackaging of hot products.
Linear low density polyethylene (LLDPE) is similar in structure to HDPE, but has the following main advantages: a higher softening point, which makes it possible to use it for prepackaging of hot foods; better performance characteristics at low and high temperatures; “a higher chemical resistance; 2-3 times higher resistance to tearing and puncture; “a higher strength and relative breaking extension; surface gloss and resistance to cracking. On the world market LLDPE is a more widely used polymer in than LDPE and HDPE, as it allows producing thin films with improved mechanical properties. This material is designed, in particular, for the manufacturing of medical packages, laminated and stretch films. It is most commonly used in the production of stretch film for machine and manual packaging. Compared to shrink packaging, stretch film packaging has the following advantages: “there is no need for thermal chambers for film shrink; “film expenditure decreases due to its lower thickness and better performance characteristics.
LLDPE properties are intermediate between those of LDPE and HDPE. However, its main feature is that its MMP is narrower than that of LDPE. The main advantages of LLDPE compared to LDPE are a higher chemical resistance, better mechanical characteristics both at low and high temperatures, high surface gloss and high resistance to cracking. When making films LLDPE exhibits increased resistance to puncture and tearing.