1979年9月底,日本的聚丙烯生产能力为年产100.1万吨,纤维生产能力为日产169吨,换算成年产60840吨(以360天计算)。另外,因未统计分纤业者的薄膜制造量,对此不清楚,但可看出有相当的生产能力。实际上,纤维生产约4万吨左右(不包 At the end of September 1979, Japan’s polypropylene production capacity was 1.010 million tons per year, and its fiber production capacity was 169 tons per day, which translates into an annual output of 60,840 tons (calculated in 360 days). In addition, it is unclear because the number of thin-film producers in the separators was not counted, but it can be seen that there is considerable production capacity. In fact, fiber production is around 40,000 tons (without