聚酯帘线应用于轮胎的设想

通过介绍世界轮胎聚酯帘线应用的基本情况及发展趋势,指出了我国在聚酯帘线的生产与应用方面的初步成绩和使用聚酯帘线的优越性及可行性,提出了希望和建议。     

用于半钢子午线轮胎胎体增强的二股聚酯帘线的开发

研究二股聚酯帘线替代三股聚酯帘线在半钢子午线轮胎胎体中的应用.结果表明:2220dtex/2聚酯帘线的物理性能、耐弯曲疲劳和圆盘压缩拉伸疲劳性能与1440dtex/3聚酯帘线相当;2500dtex/2聚酯帘线的物理性能和耐圆盘压缩拉伸疲劳性能与1670dtex/3聚酯帘线相当,且耐弯曲疲劳性能更优.二股聚酯帘线完全可以替代三股聚酯帘线进行应用.     

国产聚酯帘布在半钢丝子午线轮胎中的应用

介绍了这几年来国产聚酯帘布在半钢丝子午线轮胎中的应用情况．弹力纬线聚酯帘布的基本性能好于棉纬线聚酯帘布．用国产聚酯帘布生产的子午线轮胎成品性能符合标准，使用性能满足要求，帘线耐久性好，帘线与橡胶的粘合符合要求．国产聚酯帘布可代替进口聚酯帘布．文章讨论了聚酯胎体子午线轮胎生产工艺特点，说明了国产聚酯帘布存在的问题．     

改变欧洲轮胎生产的新型聚酯帘线

改变欧洲轮胎生产的新型聚酯帘线ＪｏｈｎＤ．Ｂｕｒｏｗｓ著王晓冬摘译涂学忠校用聚酯帘线作轮胎的增强材料决不是件新鲜事。在美国和日本,轮胎生产商设计和生产胎体及带束层均采用聚酯帘线增强的轮胎已经有很多年了。从发展历史看,轮胎增强材料先从使用人造丝到尼龙,...     

聚酯帘线的发展趋势

从聚酯的结构设计、帘线浸胶工艺和在轮胎中的应用3个方面阐述聚酯结构特点与产品性能的关系。聚酯帘线行业应该密切关注汽车行业的发展态势,把握市场先机,进一步发展壮大;在新能源汽车逆势增长的形势下,高性能聚酯帘线需求量较大,帘线企业应拓展高性能聚酯帘线在轮胎冠带层、带束层和胎体等部件中的应用,同时联合轮胎企业开发特种聚酯材料和混纺材料等新产品。     

轻载聚酯胎体子午胎的设计和研制

介绍首次采用国产聚酯帘线研制轻载子午胎的一些成功经验     

绿色轮胎用原材料综述（二）

2．7复合帘线 到目前为止，还没有一种市售的帘线能完全满足轮胎所要求的各种性能。轮胎对帘线性能的要求见表1。为充分利用帘线的优点，克服各种帘线的固有缺点，专家们提出采用复台帘线的方法。已有专利提出采用尼龙-聚酯复合帘线，这种复合帘线的结构是，以尼龙长丝作为表层，以聚酯丝作为芯层。据称，这种复合帘线具有集聚酯帘线的弹性、强度和其他特性以及尼龙帘线良好的粘着性于一身的优点。     

子午线轮胎用聚酯增强材料

聚酯帘线用做子午线轮胎增加材料已有相当长的历史，在美国和日本聚酯使用的份额比西欧要高。但是在西欧，聚酯在速度极限较低的S级和T级轿车轮胎中正在取代人造丝，使用量已达５０％。随着轮胎生产技术的提高，对聚酯帘线的要求越来越高，普通聚酯帘线的使用量在不断下降，代之而起的是尺寸稳定的高模量低收缩聚酯帘线，这种聚酯帘线一直在进一步改进其尺寸稳定性。用这种聚酯工业丝加工的帘子布，具有高模量、高疲劳强度及尺寸稳定性好、低热收缩，尤其适合于做子午线轮胎。高模低收缩聚酯浸胶帘子布应用在轮胎中具有以下优势：由于较低…     

高模量低收缩聚酯帘线的开发与应用

介绍了高模量低收缩聚酯帘线的开发应用情况,采用性能优异的尺寸稳定型聚酯帘线替代人造和标准型聚酯帘线生产轻载及轿车子午线轮胎,可提高产品质量和实现轻量化,而且可简化生产工艺,提高生产效率,使轮胎的生热降低,节油率提高,操纵稳定性好。     

生物基聚酰胺56/聚酯混合帘线的开发

对生物基聚酰胺56(PA56)与聚酯混合帘线进行开发及性能研究。结果表明:通过设计生物基PA56和聚酯工业丝的纤度,选用不同类型的聚酯工业丝,控制混捻捻度,可以得到不同结构的生物基PA56/聚酯混合帘线,其浸胶帘线可满足不同性能要求;与采用锦纶66帘线冠带层的轮胎相比,采用生物基PA56/聚酯混合帘线冠带层的轮胎高速性能和耐久性能有所提升。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。