| 摘要 |
A process for the manufacture of a moulded article comprising the powder moulding of a polymer composition having a Shore D hardness value less than 40 points; said polymer composition comprising: 1) a polyolefin composition consisting of: i) 5 to less than 100, preferably 20-70, most preferably 20-5 0, parts by weight of a crystalline or partially crystalline isotactic polymer of 1-butene; and ii) more than 0 to 95, preferably 30-80, most preferably 50-80 , parts by weight of a thermoplastic elastomeric polyolefin composition having a melt flow rate of 20-100 g/10 min (at 230 ~C and 2.16 kg); or 2) a polyolefi n composition consisting of: iii) 100 parts by weight of a crystalline or partially crystalline isotactic polymer of 1-butene or composition (1); and iv) more than 0 to 100, preferably 5-100, parts by weight of an elastomeric polymer; with the proviso that when the polymer of 1-butene is a homopolymer or a copolymer with less than 2 wt% of comonomer, polymer compositions (1) a nd (2) contain at least 5 parts by weight of an elastomeric polymer.
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