Metallocene catalysed grades of LLDPE are also now readily available, offering high puncture resistance and good clarity, and these are finding particular application iu the high performance end of the pallet stretch film market, especially for pre­stretch machines. Most stretch film is produced by the cast process The choice of comonomer in LLDPE depends on perfonnance required; octene and hexene offer superior strength but are more expensive than butene LLDPE, hence they are used for more demanding applications.
metallocene grades are suitable, offering oppo1tunities for significant down gauging with no loss of strength.