连续玻纤增强聚丙烯预浸带熔融浸渍过程纤维断裂研究

doi:10.19491/j.issn.1001-9278.2022.06.011

中国塑料 ›› 2022, Vol. 36 ›› Issue (6): 69-76.DOI: 10.19491/j.issn.1001-9278.2022.06.011

连续玻纤增强聚丙烯预浸带熔融浸渍过程纤维断裂研究

李杰¹, 徐然¹, 任峰¹, 杨一飞¹, 信春玲¹, 何亚东¹^,²()

^1.北京化工大学机电工程学院，北京 100029
^2.教育部高分子材料加工装备工程研究中心，北京 100029

收稿日期:2022-01-26 出版日期:2022-06-26 发布日期:2022-06-27
通讯作者: 何亚东（1971-），男，教授，博士生导师，研究方向为聚合物改性和热塑性复合材料，heyd@mail.buct.edu.cn
E-mail:heyd@mail.buct.edu.cn

Fiber fracture of continuous glass fiber⁃reinforced polypropylene prepreg tapes during melt impregnation

LI Jie¹, XU Ran¹, REN Feng¹, YANG Yifei¹, XIN Chunling¹, HE Yadong¹^,²()

^1.College of Mechanical and Electrical Engineering，Beijing University of Chemical Technology，Beijing 100029，China
^2.Polymer Processing Equipment Engineering Research Center，Ministry of Education，Beijing 100029，China

Received:2022-01-26 Online:2022-06-26 Published:2022-06-27
Contact: HE Yadong E-mail:heyd@mail.buct.edu.cn

摘要/Abstract

摘要：

为提高连续玻纤增强聚丙烯预浸带（PP/GF）性能，采用熔融浸渍法制备连续玻璃纤维增强聚丙烯预浸带，研究了PP熔体浸渍连续GF束过程。基于Weibull分布函数建立了纤维断裂数学模型，预测预浸带生产过程中纤维断裂率并描述实验结果。结果表明，模型与实验数据吻合较好，能够为工业化生产提供指导；纤维束在浸渍模具中受到树脂熔体的作用，及纤维与设备之间的摩擦是影响纤维断裂的主要因素，适当提高浸渍模具温度，降低纤维束牵引速度，增大浸渍模具间隙能有效降低纤维断裂率，提高工艺稳定性。

关键词: 熔融浸渍, 纤维断裂, 预浸带, Weibull函数, 断裂模型

Abstract:

To improve the performance of prepreg tapes， a continuous?glass?fiber?reinforced polypropylene （PP/GF） prepreg tape was prepared using a melt impregnation method， and the impregnation process of continuous fiber bundle in the PP melt was investigated. A mathematical model of fiber fracture was established by means of the Weibull distribution function to predict the fiber fracture rate during the producing process of the prepreg tape and to describe the experimental results. The results indicated that the prediction results obtained from the model was in good agreement with the experimental data. This provides guidance for the industrial production. The fiber fracture was mainly influenced by the effect of resin melt on the fiber bundle in the mold as well as the friction between the fiber and the equipment. Through improving the mold temperature appropriately， reducing the fiber traction speed， and increasing the mold gap， the fiber breakage was reduced effectively and the process stability was improved.

Key words: melt impregnation, fiber fracture, prepreg tape, Weibull function, fracture model

中图分类号:

TQ325.1⁺4

李杰, 徐然, 任峰, 杨一飞, 信春玲, 何亚东. 连续玻纤增强聚丙烯预浸带熔融浸渍过程纤维断裂研究[J]. 中国塑料, 2022, 36(6): 69-76.

LI Jie, XU Ran, REN Feng, YANG Yifei, XIN Chunling, HE Yadong. Fiber fracture of continuous glass fiber⁃reinforced polypropylene prepreg tapes during melt impregnation[J]. China Plastics, 2022, 36(6): 69-76.

图/表 17

图1 浸渍模具中的楔形区

Fig.1 Wedge zones in impregnation mold

图2 楔形区结构图

Fig.2 Structure diagram of the wedge zone

图3 制备过程中的纤维弯曲

Fig.3 Fiber bending during preparation

图4 纤维束的分层

Fig.4 Delamination of fiber bundles

图5 预浸带制备工艺过程

Fig.5 Preparation process of prepreg tapes

图6 BX3920流变曲线

Fig.6 Rheological behavior of BX3920

温度/℃	$η 0$ /Pa·s	$λ$ /s	n
250	101.2	0.063 5	0.799
240	117.9	0.06 734	0.790 8
230	132.9	0.06 944	0.812 3
220	188.7	0.09 318	0.783 1
210	239.5	0.121 8	0.784 2
200	297.3	0.159 1	0.773 8

温度/℃	$η 0$ /Pa·s	$λ$ /s	n
250	101.2	0.063 5	0.799
240	117.9	0.06 734	0.790 8
230	132.9	0.06 944	0.812 3
220	188.7	0.09 318	0.783 1
210	239.5	0.121 8	0.784 2
200	297.3	0.159 1	0.773 8

表1 BX3920的Carreau模型参数

Tab.1 Carreau model parameters of BX3920

表1 BX3920的Carreau模型参数

Tab.1 Carreau model parameters of BX3920

图7 浸渍模具温度对预浸带浸渍程度的影响

Fig.7 Effect of dipping mold temperature on the degree of dipping of prepreg tapes

图8 浸渍模具温度对预浸带纤维断裂率的影响

Fig.8 Effect of dipping mold temperature on the degree of fiber fracture rate of prepreg tapes

图9 牵引速度对预浸带浸渍程度的影响

Fig.9 Effect of pulling speed on the degree of dipping of prepreg tapes

图10 牵引速度对预浸带纤维断裂率的影响

Fig.10 Effect of pulling speed on the degree of fiber fracture rate of prepreg tapes

图11 牵引速度对预浸带拉伸强度的影响

Fig.11 Effect of pulling speed on tensile strength of prepreg tapes

图12 预浸带断面SEM照片

Fig.12 SEM image of prepreg tapes

图13 浸渍模具间隙对预浸带浸渍程度的影响

Fig.13 Effect of dipping mold gap on the degree of dipping of prepreg tapes

图14 浸渍模具间隙对预浸带纤维断裂率的影响

Fig.14 Effect of dipping mold gap on the degree of fiber fracture rate of prepreg tapes

图15 浸渍模具间隙对预浸带拉伸强度的影响

Fig.15 Effect of dipping mold gap on tensile strength of prepreg tapes

图16 牵引速度3 m/min，不同模具间隙下制备预浸带截面SEM照片

Fig.16 SEM images of prepreg strips prepared under different mold gaps at the traction speed of 3 m/min

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连续玻纤增强聚丙烯预浸带熔融浸渍过程纤维断裂研究

Fiber fracture of continuous glass fiber⁃reinforced polypropylene prepreg tapes during melt impregnation

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