中国塑料 ›› 2024, Vol. 38 ›› Issue (10): 81-86.DOI: 10.19491/j.issn.1001-9278.2024.10.015

• 加工与应用 • 上一篇    下一篇

浅析注塑工艺对二醋酸纤维素力学性能的影响

成名, 王永康, 何杰, 王如意, 向光会()   

  1. 四川普什醋酸纤维素有限责任公司 四川 宜宾 644300
  • 收稿日期:2023-11-02 出版日期:2024-10-26 发布日期:2024-10-21
  • 通讯作者: 向光会(1986—),高级工程师,主要从事醋酸纤维素等高分子聚合物的研究和开发工作, dirray@126.com
    E-mail:dirray@126.com
  • 基金资助:
    《中国塑料》是国家科委和国家新闻出版署批准的全国性(中央级)科学技术期刊,月刊,由中国塑料加工工业协会、北京工商大学、轻工业塑料加工应用研究所主办。属于中国科学引文索引数据库(CSCD)核心期刊、美国化学文摘(CA)收录核心期刊、中国科技核心期刊(中国科技论文统计源期刊)、中国学术期刊综合评价数据库来源期刊、全国中文核心期刊,荣获第三届国家期刊奖。《中国塑料》每月26日出书,国内外公开发行,国内统一刊号(CN11-1846/TQ);国际标准刊号:ISSN 1001-9278。《中国塑料》被美国《化学文摘》(CA)、日本科学技术振兴机构中文数据库(JST)、中国科技论文统计源、中文科技期刊数据库、中国学术期刊(光盘版)(CNKI)、美国艾博思科(EBSCO)数据库、万方数据库、维普数据库、超星域出版等国内外知名数据库收录。2023年入选中信所“第6届中国精品科技期刊”,即“中国精品科技期刊顶尖学术论文(F5000)”项目来源期刊

Influence of injection molding process on mechanical properties of cellulose diacetate

CHENG Ming, WANG Yongkang, HE Jie, WANG Ruyi, XIANG Guanghui()   

  1. Sichuan Push Acetati Co,Ltd,Yinbin 644300,China
  • Received:2023-11-02 Online:2024-10-26 Published:2024-10-21
  • Contact: XIANG Guanghui E-mail:dirray@126.com

摘要:

使用不同的工艺条件对二醋酸纤维素塑料(DACP)进行注射成型,将注塑温度、注射速度、压力等条件逐个改变,研究不同条件下DACP注塑制品力学性能的变化。结果表明,随着注塑条件的改变,材料的性能会出现一些规律性的变化,其中注塑温度对DACP韧性和断裂伸长率的影响较大,随着温度的提高韧性增强,断裂伸长率大幅增加,但在230 ℃以上材料出现黄变。过高或过低的注塑速度都会造成DACP的冲击性能下降,中速(55 %)的注射速度冲击强度最高。压力的变化对性能的影响不大,但过高的压力可能导致飞边的等缺陷的产生。工艺选择注塑温度为225 ℃,注射速度为55 %、压力为9 MPa时整体性能较好。因此选择合适的注塑工艺,对DACP制品的性能有所改善。

关键词: 二醋酸纤维素, 注射成型, 力学性能, 成型工艺, 眼镜架, 应力

Abstract:

Cellulose diacetate plastic (DACP) was injection molded under different process conditions with a change in the injection temperature, injection speed, pressure, and other conditions one by one. The mechanical properties of the injection⁃molded products were investigated. The results indicated that with a change in the injection conditions, the molded products presented a regular change in their performance. The injection temperature exhibited a greater influence on the toughness and elongation at break of the molded products. Their toughness was further enhanced with an increase in the injection temperature, followed by a significant improvement in the elongation at break. However, the molded products started yellowing at a temperature of above 230 ℃. An over high or over low injection speed might lead to deterioration in the impact resistance of the molded products. The products molded at a medium speed of 55 % exhibited the highest impact strength. The change of injection pressure generated little effect on the performance of the molded products; however, an excessive pressure led to some defects such as flashing. The molded products exhibited the optimal overall performance at an injection temperature of 225 ℃, an injection speed of 55 %, and an injection pressure of 9 MPa In this sense, selecting an appropriate injection molding process condition can improve the performance of the injection⁃molded DACP products.

Key words: cellulose acetate, injection molding, mechanical property, molding process, spectacles frame, stress

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