摘要:
This invention relates to an ethylene polymer having a weight average molecular weight of at least 120,000 comprising 1-50 tertiary double bonds per 10,000 carbon atoms.
摘要:
A process for the manufacture of a polymer film comprising: obtaining a polymer composition comprising at least 70% wt of a chromium HDPE and 3 to 30% wt of a unimodal mLLDPE; extruding and then blowing said film at blow up ratio of 2:1 to 4:1 so as to obtain a film having a tensile strain at break in the transverse direction of at least 550%.
摘要:
The present invention relates to a pipe made of a polyethylene composition comprising a polyethylene base resin, which comprises c. an ethylene copolymer as fraction (A), and d. an ethylene homo- or copolymer as fraction (B), with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), the base resin having (i) a density of below 940 kg/m 3 , and (ii) a MFR 5 at 190 °C / 5.00 kg of at least 0.20 g/10 min, and the polyethylene composition having a time to failure of at least 250 h measured according to ISO 1167 at 95°C and 4.3 MPa.
摘要:
A crosslinked ethylene polymer pressure pipe and a method for the preparation thereof are described. The pipe is characterised in that it comprises an ethylene polymer with a density of less than 950 kg/m 3 obtained by polymerisation with a single-site catalyst and having a shear thinning index, SHI 5/300 of less than 20 and a MWD of
摘要翻译:描述了一种交联乙烯聚合物压力管及其制备方法。 该管的特征在于其包含通过用单中心催化剂聚合而获得的具有小于950kg / m 3的密度的乙烯聚合物,并且具有剪切稀化指数,小于20的SHI5 / 300和MWD 的<10。 该方法的特征在于它包括将乙烯(任选地与至少一种共聚单体)一起聚合到单中心催化剂中以提供上述限定的乙烯聚合物,通过挤出和交联将乙烯聚合物形成管。
摘要:
Insulation layer for cables comprising a heterophasic polymer composition having superior mechanical and electrical properties and being environmentally friendly. The heterophasic polymer composition comprises a polymer matrix and dispersed therein a propylene copolymer having a weight average particle size of less than 1 µm.