Development tendency of PE stretch film
浏览： 次时间：2017/3/8 21:29:45

FIRST:MATERIALS TRENDS

Approximately 1,935.8 million lb of PE resins were consumed in the production of stretch film, making this PE business one of the largest and fastest growing markets within the PE film industry, according to the Mastio study In 2014. With an average annual growth rate (AAGR) of 4.5%, PE resin consumption for the production of stretch film should reach 2,213.1 million lb by the year 2017.

The Mastio study notes that one of the most significant changes to manifest over recent years in the stretch film market is increased use of metallocene single-site catalyst based linear low density PE (mLLDPE) resin. When used in blends or in coextrusion with conventionally produced PE resins, mLLDPE resin greatly enhances the physical properties of the films in lower gauges, according to the report.

 SECOND:TECHNOLOGY TRENDS

 monolayer blown film extrusion, multi-layer blown film coextrusion, monolayer cast film extrusion and multi-layer cast film coextrusion are included. During the past several years the stretch film industry has continued to experience a shift from blown film extrusion process to the cast film extrusion process and from monolayer construction to more multi-layer coextruded film constructions, the Mastio report concluded. Some numbers: during 2014, approximately 1,376.2 million lb (71.1%) of stretch film were produced using the cast film extrusion process, and 559.6 million lb (28.9%) were produced utilizing the blown film extrusion process.

conventionally produced butene, hexene, super hexene, or octene grades of LLDPE resin (LLDPE-butene, LLDPE-hexene, LLDPE-super hexene, and LLDPE-octene). mLLDPE resin enhances the film’s clarity, elongation, tear resistance, and puncture resistance in much thinner gauges, for only slightly higher material costs.