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Development of a Simplified Foam Injection Molding Technique and Its Application to the Production of High Void Fraction Polypropylene Foams
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-11-02 00:00:00 , DOI: 10.1021/acs.iecr.7b03382 Long Wang 1 , Yuta Hikima 1 , Masahiro Ohshima 1 , Atsushi Yusa 2 , Satoshi Yamamoto 2 , Hideto Goto 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-11-02 00:00:00 , DOI: 10.1021/acs.iecr.7b03382 Long Wang 1 , Yuta Hikima 1 , Masahiro Ohshima 1 , Atsushi Yusa 2 , Satoshi Yamamoto 2 , Hideto Goto 2
Affiliation
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We previously developed a resilient and innovative cellular foam injection molding (RIC-FIM) technology to illustrate that pressurization of the physical blowing agent (PBA), such as carbon dioxide (CO2), to the supercritical state is unnecessary for preparing microcellular foams. Herein, our developed FIM machine is further simplified by using the previously auxiliary venting unit as the only PBA delivery unit. Subsequently, high void fraction polypropylene (PP) foams were successfully obtained using this novel FIM machine with 4–6 MPa of nitrogen (N2). The results showed that an increase in the vessel pressure reduced the PP foam cell size and enhanced the cell density as well as the void fraction, signifying that the concentration of dissolved gas was controlled by the pressure vessel. Furthermore, compared with the N2 foaming process, CO2 foaming revealed a finer cellular structure for PP. This simplified FIM technology holds great potential for the industrial manufacturing of lightweight injection-molded products with better economic benefits.
中文翻译：
简化泡沫注射成型技术的发展及其在高空隙率聚丙烯泡沫生产中的应用
我们先前开发了一种具有弹性和创新性的多孔泡沫注射成型（RIC-FIM）技术，以说明为制备微孔泡沫而无需将物理发泡剂（PBA）（例如二氧化碳（CO 2））加压至超临界状态。在这里，我们开发的FIM机器通过使用以前的辅助排气单元作为唯一的PBA交付单元而得到进一步简化。随后，使用这种新型FIM机器成功地获得了4-6 MPa的氮气（N 2）。结果表明，容器压力的增加减小了PP泡沫塑料的泡孔尺寸，增加了泡孔密度以及空隙率，这表明溶解气体的浓度由压力容器控制。此外，与N 2发泡过程相比，CO 2发泡显示出PP的细孔结构。这种简化的FIM技术在工业制造轻型注塑产品方面具有巨大的潜力，具有更好的经济效益。
更新日期：2017-11-03
中文翻译：
简化泡沫注射成型技术的发展及其在高空隙率聚丙烯泡沫生产中的应用
我们先前开发了一种具有弹性和创新性的多孔泡沫注射成型（RIC-FIM）技术，以说明为制备微孔泡沫而无需将物理发泡剂（PBA）（例如二氧化碳（CO 2））加压至超临界状态。在这里，我们开发的FIM机器通过使用以前的辅助排气单元作为唯一的PBA交付单元而得到进一步简化。随后，使用这种新型FIM机器成功地获得了4-6 MPa的氮气（N 2）。结果表明，容器压力的增加减小了PP泡沫塑料的泡孔尺寸，增加了泡孔密度以及空隙率，这表明溶解气体的浓度由压力容器控制。此外，与N 2发泡过程相比，CO 2发泡显示出PP的细孔结构。这种简化的FIM技术在工业制造轻型注塑产品方面具有巨大的潜力，具有更好的经济效益。
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