| 摘要 |
The container is made by extrusion/blowing from a linear polyethylene copolymer of the order of 0.2-0.4 mm thick with welded seam and no cap or lid, being opened by cutting or breaking off one corner. The plastic selected for the container has a flexion range of at least 134 deg C; a density of the order of 0.952 at 23 deg C, and an MFI 190/5 fluidity index of the order of 1.7 g/10 mm. The copolymer has a flow threshold of some 28 Mla, an elongation of about 9%, a traction elasticity module of 1250 MPa and a flexion elasticity module of about 1310 MPa; it has an H30 ball hardness of about 48 MPa, and a resistance to shock without bursting between +23 and -20 deg C.
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