几种性能优良的挤出螺杆

本文分析了几种挤出螺杆的结构、参数及其使用性能。这些螺杆包括HMW-HDPE挤出吹膜用分离—混炼型螺杆、聚烯烃挤出用分离—混炼型螺杆及聚烯烃挤出吹塑用混炼型螺杆。它们具有产量高、熔体温度低及过程稳定性好等优点.     

影响聚烯烃中空吹塑瓶质量因素的探讨

本文探讨了工艺、模具、原料对聚烯烃中空吹塑瓶质量的影响。通过分析，可使人们在编排工艺、设计模具及选择原料时获得一定的益处。     

塑料透明剂

广州石油化工总厂研究所最近开发出聚烯烃塑料透明剂GPC—818,它能显著提高聚烯烃塑料制品的透明度,缩短成型周期,改善制品力学性能,适用于注塑、挤出、吹塑等加工工艺。如加入0.25％的     

塑料中空吹塑成型用原料、工艺及设备的发展

综述了近年来塑料中空吹塑成型用原料与助剂、设备和工艺的发展与进步,包括新牌号的树脂、共混物及共聚物与新型助剂;新型注射吹塑成型机、注射拉伸吹塑成型机、挤出吹塑成型机和拉伸吹塑成型机;阻透、微发泡、超薄、超轻技术等。新牌号树脂主要有饮料瓶级聚苯乙烯、吹塑成型级聚甲醛、聚酰胺6、聚偏氟乙烯、聚乳酸和吹塑成型级聚丙烯等;中空吹塑成型机主要介绍了全电动、高速、节能、多层共挤出等机型的发展等。     

新型聚烯烃弹性体

杜邦-陶氏Elastomets公司Engage聚烯烃弹性体的扩大系列包括吹塑成型和挤出成型的新品种.     

工程塑件的吹塑成型——工程塑料和热塑性塑料弹性体的加工技术

工程塑件的吹塑成型──工程塑料和热塑性塑料弹性体的加工技术董祥忠译本文讨论吹塑成型工程塑料和热塑性弹性体（ＴＰＥ）的加工技术，主要是工程塑料的机械加工和生产技术，尤其侧重于该技术在与聚烯烃加工的不同之处。在工程塑件吹塑成型中，从竞争的观点出发，将其与...     

Clariant研发液体染料技术并公布新系列紫外稳定剂

最近,Clariant公司研发了一项液相媒介技术（Liquid Vehicle Technology,LVT）,用于解决目前在挤出吹塑法制备聚乙烯和聚丙烯使用的液体染料和添加剂所带来的问题。液体色母经常作为固体浓缩添加剂的替代品,用于挤出吹塑法制备家用类容器。然而,当挤出吹塑法用于制备聚烯烃,     

聚烯烃中空吹塑瓶生产中异常现象的排除

对聚烯烃中空吹塑瓶生产中的异常现象进行探讨，并详细分析了产生这些现象的原因，提出了解决问题的方法。     

聚氯乙烯的挤出吹塑成型

简述吹塑级PVC的性能、种类与制品用途,着重分析吹塑级PVC混合料的配方及其挤出吹塑的机械(挤出机、机头与吹塑模具)。     

塑料透明剂

广州石油化工总厂研究所最近开发出聚烯烃塑料透明剂GPC-818,它能显著地提高聚烯烃塑料(包括聚丙烯、聚乙烯等)制品的透明度,缩短成型周期,改善制品力学性能,而且安全无毒,适用于挤塑、注塑、吹塑等加工工艺生产薄膜、片材、容器和其他包装材料。如     

Basic studies of blow molding of talc-thermoplastic compounds

An experimental study of the blow molding of talc-polyethylene and talc-polypropylene compounds is presented. These compounds are found not to exhibit zero shear viscosity but rather yield stresses, below which there is no flow. The annular swell of the compositions is greatly reduced compared to the neat thermoplastics, but extrusion sag is minimized. Blow molded bottles of talc-thermoplastic compounds were found to have much greater thickness uniformity than blow molded neat polyolefins. The talc particles were determined, by X-ray diffraction, to be oriented with the flake surfaces parallel to the mold surface or equivalently to the bottle surface.     

Gasoline permeation resistance of the as‐blow‐molded and annealed polyethylene,polyethylene/polyamide,and polyethylene/modified polyamide bottles

An investigation of the gasoline permeation resistance of the as‐blow‐molded and annealed polyethylene, polyethylene (PE)/polyamide (PA), and polyethylene/modified polyamide (MPA) bottles is reported. The gasoline permeation resistance improves dramatically after blending PA and MPA barrier resins in PE matrices during blow‐molding, and the order of barrier improvement corresponds to the order of barrier improvement of the barrier resins added in PE. Somewhat unexpectedly, the gasoline permeation rates of the annealed PE and/or PE/PA bottles annealed at 90°C or higher temperatures increase significantly with the annealing temperature and time. On the contrary, the gasoline permeation resistance of the annealed PE/MPA bottles increase significantly as the annealing temperature and/or time increase. For instance, the gasoline permeation rate of the PE/MPA bottle annealed at 120°C for 32 h is about 190 times slower than that of the as‐blow‐molded PE bottle. Further investigations found that, after blending the MPA and PA barrier resins in PE matrices, the relatively nonpolar hydrocarbon components present in the gasoline fuels were significantly blocked, without permeation during the permeation tests, in which the as‐blow‐molded PE/MPA bottle inhibited the permeation of hydrocarbon components more successfully than did the as‐blow‐molded PE/PA bottle. In contrast, the amounts of polar components that permeated through the as‐blow‐molded PE/PA and PE/MPA bottles were very small and about the same as the amount that permeated through the as‐blow‐molded PE bottle. Possible mechanisms accounting for these interesting behaviors are proposed in this study. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2827–2837, 2001     

尼龙6／高密度聚乙烯共混物吹塑瓶

尼龙6与高密度聚乙烯共混,以接枝聚乙烯作相容剂,提高了冲击强度,增大了熔体粘度。所制作的吹塑瓶既可满足气密性要求,又易于吹塑成型。     

聚碳酸酯的吹塑成型

简介聚碳酸酯吹塑容器的特性与用途,着重分析其吹塑(包括挤出吹塑、共挤吹塑和注射吹塑)成型的机械(螺杆、机筒、型坯机头与吹塑模具)设计要点及工艺条件。     

弯曲状管件的吹塑

介绍成型弯曲状管件的５种吹塑方法：真空牵拉式吹塑、机头或模具运动式吹塑、机械手牵拉式吹塑、顺序共挤出吹塑和组合式吹塑。这些吹塑法成型的弯曲状管件具有飞边少、力学性能好等优点。     

PE-UHMW挤出中空吹塑设备与工艺的研究

改型设计了改性超高相对分子质量聚乙烯的挤出中空吹塑设备，设计采用了专用的挤出螺杆、机筒、模头和模具，并研究改进了吹塑工艺及生产方法，从而克服了超高相对分子质量聚乙烯的加工难点，得到了合格的吹塑制品。     

我国中空吹塑行业发展现状及“十四五”期间重点产品、工艺和设备发展方向

从原料、中空成型机和吹塑工艺等方面介绍了我国中空吹塑行业发展现状，并对电子化学品专用超洁净桶、高压储氢四型瓶、全电动中空成型机、微发泡中空成型技术和挤吹聚对苯二甲酸乙二醇酯（PET）容器等在“十四五”期间的重点产品、工艺和设备发展方向进行了展望。     

Orientation and crystalline morphology of blow molded polyethylene bottles

A study was carried out of the development of orientation during processing of conventional blow molded bottles made from low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and high density polyethylene (HDPE). The level of molecular orientation was found to be relatively low in all of the polyethylene bottles examined; it increased with increasing inflation pressure and decreasing extrusion temperature. Pole figures for the HDPE bottles indicated a slight a-axis orientation toward the circumferential direction of the bottle. The b-axes, which correspond to the lamellar growth direction, tend to be parallel to the bottle thickness direction. A comparison was made of the structure developed in blow molded bottles and blown films. The results for both films and bottles indicate that crystallization during processing involves both an increase in level of molecular orientation and an increased tendency toward biaxiality. Based on pole figures and small angle X-ray scattering patterns, a morphological model for HDPE blow molded bottles is proposed.     

Parison formation and inflation behavior of polyamide-6 during extrusion blow molding

Parison formation and inflation behavior of three polyamide 6 resins during extrusion blow molding were investigated using cinematography, a transparent mold, a pinch-off mold and a modified blow pin, which allowed the pressure inside the parison to be determined during inflation. The glass fiber filled polyamide exhibited negligible extrudate swell and significant drawdown, whereas polyolefin modified polyamide exhibited appreciable extrudate swell and relatively small drawdown effects. The inflation behavior of the polyolefin modified polyamide was similar to the behavior of conventional blow molding grade polyolefins, whereas the unmodified and glass filled polyamides exhibited different inflation characteristics. Their inflation behavior at different internal pressures was characterized by decreasing and increasing Hencky strain rates with inflation time at high and low internal blow pressures, respectively. The characterized parison formation and inflation behavior of the polyamides emphasize the importance of rigorous blow moldability experiments and the difficulties associated with linking various rheological material functions to the blow moldability of modified polyamides.     

HDPE／EVOH共混阻透容器的研制

将HDPE、EVOH和PE－g-MAH等混合后，吹瓶制成共混阻透容器，考察了EVOH和PE－g-MAH的用量及成型工艺对容器阻透性能的影响。结果表明，较低的增容剂用量和剪切速率及在适当的温度下制备的容器，其阻透性能得到大幅度提高。