| 摘要 |
FIELD: packing industry. ^ SUBSTANCE: present invention is related to containers intended for packaging and storage of clothes, sports items, toys or items for do-it-yourselfer, preferably, shoes. Transparent polypropylene container is manufactured from heterophase copolymer of propylene including 50-98 wt % of crystalline homopolymer of propylene or crystalline static copolymer of propylene with ethylene and/or C4-C10-1-alkenes, containing 0.5-15 wt % of ethylene and/or C4-C10-1-alkene; or 2-50 wt % (i) of elastomer copolymer of ethylene with one or higher number of C4-C10-1-alkenes (coplymer (a)), containing 60-85 wt % of ethylene, or (ii) mixture of copolymer (a) with copolymer of propylene, containing 15-40 % of ethylene (copolymer (b)). Weight ratio (a)/(b) preferably makes from 1/4 to 4/1. Copolymer has cloud factor equal to ëñ 40%, module of elasticity in stretching equal to ëÑ 700 MPa, Charpy impact strength with cut at 0 C equal to ëÑ 3 kJ/m2, whitening value in stressing that equals 0-8 mm. Transparent polypropylene container has thickness of walls of at least 0.8 mm. ^ EFFECT: suggested transparent polypropylene containers have proper mechanical characteristics, which make it possible to handle packaging easily, are efficient in manufacturing. ^ 6 cl, 1 dwg |
