日本挤出机牵引胶带的研制

介绍了日本挤出机用牵引胶带的配方与工艺。本胶带为同步胶带，其齿形材料为聚氨酪，背胶材料选用氯丁橡胶，骨架材料选用2层300型聚酯布。胶带表面设计有弧形牵引槽。该胶带不易变形，使用寿命是普通橡胶带的2倍。     

国内简讯

PU/CR同步胶带研制成功一种齿部为聚氨酯材料、背部为氯丁橡胶的同步胶带,在山东安泰橡胶有限责任公司研制成功。该胶带的开发,为实现长时期使用的齿部不易变形、速比稳定且无丢转现象提供了技术保证。同步齿形带是一种工作面带有横向齿形结构的传动带,利用齿和带轮之间的啮合来传递动力,具有无滑差,传动比大,噪声低,带体轻、薄,使用寿命长等特点。本次研制的是与日本挤出机配套的牵引同步胶带。它主要由带齿、骨架层、背胶(设计有牵引槽)三部分组成。由于该胶带用于牵引挤出的胶管,因此胶带的背部部位设计有牵引槽。挤出胶管外径为6～60m…     

THD400提升机应用中出现的问题及解决措施

我厂技术改造工程选用了朝阳重型机器厂的高效胶带斗式提升机,牵引件为钢丝绳胶带,现有ＴＨＤ４００、ＴＨＤ５００两种型号各两台,其中ＴＨＤ４００ｍｍ×６４ｍ提升机用于新建１０００ｔ／ｄ预分解窑的喂料提升。经几年使用,这台喂料提升机断胶带、接头构件失效等设...     

纤维骨架材料技术讲座第4讲 管带类橡胶制品用纤维骨架材料的结构与性能(续二)

(接上期 )2　动力传动胶带用纤维骨架材料的性能2 1　平型动力传动胶带用纤维骨架材料平型动力传动胶带的骨架材料为帆布。无炭黑胶料的平型动力传动胶带可采用棉帆布 ,以使带体美观 ,操作方便。维尼纶帆布或维 棉混纺纱帆布既有一定的尺寸稳定性 ,又易于与橡胶粘合 ,是平型传动胶带较为理想的骨架材料。大功率动力传动带以棉帆布为骨架材料时需采用重型帆布或通过增大帆布层数获得足够的强度 ,但由于带体厚且质量较大 ,使传动带的屈挠性变差 ,传动能耗增大 ,因此最好采用聚酯帆布。2 2　Ｖ带用纤维骨架材料2 2 1　包布式Ｖ带国外发达国…     

汽车用胶带的材料进展

介绍汽车用胶带的材料进展。目前汽车用胶带的胶料主体材料主要为CR和氢化丁腈橡胶，乙烯一丙烯酸酯橡胶和热塑性EPDM的应用研究正在进行；线绳主要为聚酯线绳、玻璃纤维线绳和芳纶线绳；包布主要为平纹帆布、广角帆布和高弹性包布；短纤维主要为预处理锦纶短纤维、木质素短纤维、聚酯短纤维和棉短纤维。我国汽车用胶带材料已实现了氯丁化、线绳化和短纤维化的目标，但材料性能和构成与国外相比差距仍然较大，胶带质量和档次有待提高。     

钢丝胶带斗式提升机用输送带接头结构改进

钢丝胶带斗式提升机的提升高度是各种类型斗式提升机中最高的，可以达到一百二十米以上。提升机中采用的钢丝绳芯橡胶带（简称钢丝胶带，下同）是牵引件也是承载件。钢丝胶带的连接技术是提升机中关键技术之一。钢丝胶带是在橡胶带中含有纵向钢丝绳的输送带，对钢丝胶带连接的基本要求是：①强度上可靠，能够实现等强度连接；②接头内侧平坦并且绕性好，能够实现平稳地通过滚筒；③安装和拆卸方便。     

我国胶带生产发展及使用概况

本文主要介绍我国解放三十多年来胶带工业的发展情况，从原料选用，内架多祥化，胶带结构，胶片与骨架粘结剂配方等均有长足的进步。在胶带的品种上，对高强度，大带宽，高速度及特种胶带均有所介绍。目前中国产胶带单机长度可至3000米，输送量可到1000吨／时，大倾角输送为35°－45°，实际使用可至45°－90°胶带速度我国系列设计为5米／秒，胶带最大宽度可达3000毫米。对特种胶带如装铠耐高温带，难燃输送带，耐寒输送带，导静电运输带等试验生产情况也有所论述。     

德罗曼胶带落户天津

德国罗曼胶带最近落户天津经济技术开发区,成立了罗曼胶带技术(天津)有限公司,是德国罗曼胶带集团在天津投资的独资企业,总投资额为353万欧元,注册资本为225万欧元。德国罗曼胶带集团成立于1851年,是一家在世界工业胶带行业领先的跨国公司,在80多个国家拥有高级专用胶带和其它电子专用材料的销售市场。罗曼胶带天津公司主要生产和销售罗曼公司的专用胶带和其它元器件专用材料。德罗曼胶带落户天津@方泽     

热敏型压敏胶带的研制

本热敏型压敏胶带的压敏胶以天然橡胶为主体，加入合成橡胶、增粘剂及其他助剂制成。胶带的基材是含有热敏剂的美纹纸。选用了一种比有机硅增粘剂交联温度低而且可以书写的高分子共聚物(100℃以下交联)作为防粘剂。确定了压敏胶的配方和胶带的生产工艺，并检测了各项性能。试验证明，该胶带在常温下无色，在高温时则会显示出标识、字迹或图案。在医学、科研等领域有广泛的用途。     

2004年制修订的胶带标准简介

根据国家标准化管理委员会及国家经济贸易委员会制修订标准项目计划 ,2 0 0 4年需完成制修订胶带标准有下列五项 :修订国家标准GB/T 1 1 71《一般传动用普通V带》和GB/T 3684《输送带　导电性　规范和试验方法》 ,制定化工行业标准HG/T《耐酸碱输送带》和HG/T《同步带用浸胶玻璃纤维绳》 ,修订HG 2 0 1 4《钢丝绳牵引阻燃输送带》。以上胶带标准草案征求意见稿在发函给全国胶带标准化审查委员会委员征求意见后 ,形成了标准草案送审稿 ,在全国胶带标准化审查委员会 2 0 0 4年工作年会上对五项胶带标准进行审查。参加会议的有 2 8个单位…     

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.     

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.     

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。     

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.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.