橡胶骨架材料行业浅析

简述了橡胶骨架材料的发展历程,指出我国橡胶骨架材料的现状是锦纶帘布供大于求,聚酯工业丝及其产品后加工快速发展,钢丝帘线成为新的发展方向。并对“十一五”期间橡胶骨架材料的发展作了展望。     

橡胶骨架材料行业浅析

简述了橡胶骨架材料的发展历程,指出我国橡胶骨架材料的现状是锦纶帘布供大于求,聚酯工业丝及其产品后加工快速发展,钢丝帘线成为新的发展方向。并对"十一五"期间橡胶骨架材料的发展作了展望。     

中国橡胶工业新材料进展（下）

3 橡胶骨架材料 橡胶骨架材料在很大程度上决定着橡胶产品的使用功能和使用寿命，我国橡胶骨架材料按1958年锦纶千吨装置投产命名计，至今已有48年历史。目前主要品种有钢丝、涤纶和锦纶（包括锦纶6和锦纶66），芳纶及高性能纤维。     

2005年我国橡胶制品骨架材料出口情况

产品名称锦纶66工业长丝锦纶66帘布锦纶6工业长丝锦纶6帘布涤纶帘布工涤业纶长普通丝工涤业纶长高模丝锦纶帆布涤纶帆布钢丝帘线胎圈钢丝管带钢丝出口量2900015000175008779114982650020024003500184601505812000吨2005年我国橡胶制品骨架材料出口情况~~     

2010年橡胶制品用骨架材料生产消耗情况

一、帘子布生产情况2010年,帘子布市场供大于求,出现买方市场价格走高,同时其原料己内酰胺价格受国际市场原油价格上涨与回落波动较大,锦纶6帘子布生产已微利。中国橡胶工业协会骨架材料专业委员会会员企业2010年帘布生产情况及2011年计划产量见表1。2010年中国橡胶工业协会骨架材料专业委员会会员企业(15家)生产帘子布38.54万吨,比上     

橡胶骨架材料行业

一、＂十一五＂回顾 1．基本情况我国橡胶用骨架材料行业产品包括钢帘线、胎圈钢丝、锦纶66、锦纶6、改性锦纶66、涤纶、芳纶、玻璃纤维等帘布；各类交织帆布；整体带芯织物；传动带和胶管用各类线绳，总产量约占世界总量的近1／3，成为最大的生产国，但还不是产品品种和质量的强国。大宗产品处于供需平衡或供大于求状态，部分产品品种有出口和进口。     

7.00-16高层级轻型载重轮胎强度的试验研究

以轮胎的受力及受力变形为出发点，对7．00-16高层级轻型载重轮胎选用锦纶66与锦纶6两种不同的骨架材料、不同的帘线假定伸张值及不同的胎体结构等进行强度对比试验。结果表明，胎体骨架材料采用锦纶66帘布的轮胎胎体强度比采用同规格锦纶6帘布的高；增大冠部强度和胶与线之间的粘合力可提高轮胎压穿破坏能。     

锦纶纤维特性及纤维骨架材料的发展

一、锦纶骨架材料世界应用概况 锦纶66的合成及纺丝技术于1935～1937年由美国杜邦公司的Carothers发明，并于1938年实现了中试规模，第二次世界大战期间美国开始使用锦纶66帘布制造军用飞机轮胎，1947年后用于载重胎，到50年代后期，美国的载重胎用骨架材料几乎完全由锦纶66取代了人造丝。德国于1941年实现锦纶66工业化生产。日本1958年发明用锦纶6做轮胎骨架材料制造轮胎。     

世界、亚洲和中国锦纶工业长丝/帘布市场分析

分别以世界、亚洲和中国为研究对象 ,根据轮胎行业的现状和发展趋势 ,对锦纶工业长丝 /帘布的市场现状进行了分析 ,对锦纶帘布市场的未来需求和发展进行了预测 ,并对我国帘布行业的发展提出建议 ,即国内帘布行业应进行产业重组 ;积极开拓国际市场 ,提高国际化经营水平 ;与大轮胎厂建立伙伴关系 ;增加品种规格 ,满足客户多品种、小批量、定制化的要求 ;发展聚酯、芳纶等新型骨架材料。     

尼龙帘布的近忧远虑

尼龙帘布的近忧远虑尼龙帘布强度高、耐疲劳性好、与橡胶的粘合力强，是斜交轮胎的理想骨架材料。在今后相当长一段时间内，尼龙帘布仍是我国轮胎的主要骨架材料。１９９５年，尼龙帘布呈现产销两旺的景象，曾出现价格节节上升局面。１４０ｔｅｘ／２的最高价曾达４２８０...     

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.     

Novel polyurethane coating technology through glycidyl carbamate chemistry

Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.     

Highly moisture-proof polysilsesquioxane coating prepared via facile sol-gel process

A highly moisture-proof polysilsesquioxane coating was obtained from a new bis-silylated precursor, which was synthesized from 3-aminopropyltriethoxysilane (APTES) and m-xylylene diisocyanate (m-XDI) in tetrahydrofuran (THF) and verified by ¹H MAS NMR. For direct comparison purposes, an SiO₂ coating was also prepared by the Stöber method using tetraethoxysilane (TEOS) as the reactant. Interestingly, the coating obtained from the polysilsesquioxane sol exhibited a much higher moisture resistance capability than its counterpart, which was attributed to its more compact feature between nanoparticles as characterized by N₂ absorption experiment and transmission electron microscopy (TEM). Furthermore, its high transparency of about 92% showed potential for application in the protection of optical crystals.     

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.