| 摘要 |
The invention relates to a method for injection moulding an article having a thickness of between 1 to 3 mm and having a b value in the CIE colour systemof between -1 and +0.1 and a haze value of less than 2%, as measured at 2 mm thickness, comprising the following steps: a) Providing a composition comprising: i) a polyester produced by copolymerizing, in the presence of an aluminum or germanium compound, at least three monomers chosen from at least one alkylenediol and at least one dicarboxylic acid component, ii) from 1 to 5 ppm of at least one dye and iii) from 0.1 to 0.5m% of a fatty acid ester mould release agent, b) Injecting the composition in a mould at a temperature of below 60°C until the mould is filled; c) Ejecting the article. The invention further relates to a composition comprising, A) a polyester produced by copolymerizing 1,2-ethanediol and two dicarboxylic acid components in the presence of a germanium compound, the dicarboxylic acid components comprising a terephthalic acid component and 4-20 mol% of an isophthalic acid component, the mol% being relative to the total amount of the dicarboxylic acid component, characterised that the composition further comprises, B) from 0.2 to 1.5 ppm of at least one dye, C) from 0.1 to 0.5 m% of stearylstearateor glyceroltristearate and to an article having a wall thickness of between 1 and 3 mm comprising this composition. |
