Plastic Packaging

摘要

#CMT# #/CMT# Flexible plastic package (Q) comprises a sheet comprising a polymer mixture of at least two components of a polypropylene copolymer (I) (2.16 kg) with a Beige-E-Module of up to 800 MPa and a melt flow rate of up to 600 g/10 minutes at 230[deg]C, a polypropylene (II) (2.16 kg) having a melt flow rate of 20-600 g/10 minutes at 230[deg]C and a polyolefin (III) (except polypropylene); when (I) and (II) are present, then (II) is a polypropylene copolymer, and when (I) and (III) are present, then (III) (2.16 kg) has a melt flow rate of at least 15 g/10 minutes, at 230[deg]C. #CMT# : #/CMT# Independent claims are included for: (1) a method for the preparation of (Q) from a plastic; and (2) the polymer mixture. #CMT#USE : #/CMT# (Q) is useful to carry cosmetic products, food, household products, adhesives, sealing materials and industrial chemicals (claimed). #CMT#ADVANTAGE : #/CMT# (Q): exhibits rigidity, ductility, crack stability and transparency, and is economical. #CMT#POLYMERS : #/CMT# Preparation (Claimed): Preparation of (Q) from a plastic comprises injection molding of the polymer mixture. Preferred Composition: (Q) further comprises methacrylic acid copolymer or an acrylic acid polymer. Preferred Components: The melt flow index (MFI) and Beige-E-module of the polymer mixture is 3 g/10 minutes and up to 1600 MPa, respectively. The Beige-E-Module of (I) and (II) is up to 600, preferably 20 MPa and at most 1100 MPa, respectively. When (II) and (III) are present, then (III) is a polyethylene with a density of up to 0.935 g/cm 3>. (I) and (II) contains up to 30 wt.% of ethylene. When (I) is present, then (II) has Beige-E-Module of at most 1600 MPa. (III) is a homopolymer or copolymer of polyethylene such as polybutene-1, polyisobutylene, poly-4-methylpentene-1 or cross-linked or chlorinated polyethylene. The MFI and Beige-E-module of (III) (2.16kg) are at least 2 g/10 minute, at 190[deg]C and at most 1200 MPa, respectively. The amount of (I); (II); (III) and methacrylic acid copolymer or acrylic acid copolymer is 60-80, preferably 5-50 wt.%; 20-40, preferably 5-40 wt.%; 10-60 wt.% and 60-95 wt.%, respectively. (Q) is in the form of tube. #CMT#EXAMPLE : #/CMT# Polypropylene copolymer (40 wt.%) and linear low-density polyethylene (60 wt.%) were granulated and mixed. The obtained mixture was homogenized, followed by injection molding and cooled to obtain the flexible plastic package.