涤锦三叶形复合纤维的制备及组件研制-机械工程专业论文.docxVIP

东华大学硕士学位论文 东华大学硕士学位论文 摘要 II II 成型数值模拟，分析了不同组分原料对三叶形纤维拉伸成型的影响， 主要针对挤出时的熔体速度大小，速度梯度分布，成型距离等方面进 行了讨论和分析。之后利用 fluent 进行了 PA6/PET/PP 三组分三叶形 纤维熔体挤出的数值模拟，主要针对三组分间不同流量比例进行模拟， 分析在不同流量比例时，熔体挤出过程的速度分布、体积分布，根据 模拟结果的分析，选择合适的流量比例进行制备实验，避免了实验的 盲目性。 最后，对纺丝参数的设定及制备实验的实施。针对本次制备实验 所要制备的涤锦复合三叶形纤维的特点，进行纺丝参数的设定，包括 熔体流量，联苯温度，箱体温度，吹风方式、速度、温度，纺丝速度 等。并对初生纤维进行表面及截面显微观察实验，强力拉伸实验，分 析初生纤维的表观质量及强度性能，以此对本次制备实验进行评价， 以及对不足的改进。 综上，通过以上内容的研究，研制了符合本次制备实验的三组分 纺丝组件及三叶形喷丝板，通过 polyflow 对单组分三叶形纤维的拉伸 成型数值模拟，以及利用 fluent 对三组分三叶形纤维熔体挤出过程的 数值模拟，了解了单组分、三组分三叶形纤维的挤出、成型机理，以 此设计了合理的纺丝参数，制备出强度性能优良的三叶形纤维，为涤 锦复合三叶形纤维的研制提供了宝贵的经验。 关键词：涤/锦复合纤维，三叶形纤维，喷丝板，纺丝组件，数值模拟 东华大学硕士学位论文ABSTRACT 东华大学硕士学位论文 ABSTRACT III III THE PREPARATION AND COMPONENT DESIGN OF POLYESTER/NYLON TRILOBAL COMPOSITE F IBER ABSTRACT Polyester/nylon composite fiber is a kind of ultra-fine f ibers. Fabric is made of by it has soft, waterproof and breathable and strong cleaning property. Grade fabric such as imitation peaches made of by it wins the markets fans, because the fabric breathable, moisture, watering non-deformation characteristics. Trilobal f iber having excellent optical characteristics, while having a large coefficient of friction, feeling rough, thick, durable, more suitable for outerwear fabrics. Trilobal filaments are suitable for knitting outer clothing. Such fabrics will not been hooking wire and jumping wire, even if it will not be a hole. Pile fabric produced by trilobal fiber, it suede can keep it plump, erect, with good mechanical fluffy. However, the development of differentiated fiber is developed late, and polyester/nylon composite fiber is still in the development stage. The development of special-shaped polyester/nylon composite fiber has yet to pick up the pace. Currently available polyester/nylon composite fiber in the market is main island and Sheath-core type, etc. The main task of this project is preparation and development of polyester/nylon trilobal component and composite fiber components, making the new composite fiber of a