海南自主研发BOPP激光全息防伪膜

海南现代企业股份有限公司自主研发的“BOPP激光全息防伪收缩膜”，综合了多层共挤BOPP制膜工艺技术和宽幅激光全息制版与模压技术，通过在BOPP薄膜上制取易于消费者识别的非破坏性防伪标识．从而达到防伪目的。     

海南现代研发BOPP全息防伪膜

近日海南现代企业股份有限公司自主研发出双向拉伸聚丙烯(BOPP)激光全息防伪收缩膜,综合了多层共挤BOPP制膜工艺技术和宽幅激光全息制版与模压技术,通过在BOPP薄膜上制取易于消费者识别的非破坏性防伪标识而达到防伪目的。 该产品具有多层防伪技术保护,同时防伪图标识别简易,标记清晰可见,一目了然。其主要防伪要点在于,运用独     

表面活性剂对气液传质的影响

引言在气液相际传质的研究中,有许多有关表面活性剂能降低传质膜系数的报道．Davies在其《湍动现象》一书中做了较为详细的讨论,Davies认为,少量的表面活性剂使界面产生一层附加的薄膜,这层薄膜产生的应力将阻碍表面运动．实际上,气液相际传质通常总是伴有或强或弱的界面湍动,表面活性剂不仅改变界面湍动状况,而且对近界面浓度也有较大的影响．本文利用显微激光全息干涉技术对比进行了研究．1实验1.1装置液体折射率与密度有关,只要测出物场中的折射率变化,就可得到其浓度场的信息．利用激光全息干涉技术不仅可以测定浓度场的变化…     

镭射玻璃

在玻璃或透明有机涤纶薄膜上涂敷一层感光层，利用激光在其上刻划出任意的几何光栅或全息光栅，镀上铝（或银、铝）再涂上保护漆，这就制成了镭射玻璃。它在光线照射下，能形成衍射的彩色光谱，而且随着光线的入射角或人眼观察角的改变而呈观出变幻多端的迷人图案。它使用寿命可达50年，而且正向家庭装璜发展。     

粘接技术在激光全息防伪技术上的应用

1前言近年来，由于各种产品、有价证券、证件。证书等防伪保真鉴证的需要，激光全息类产品发展迅速，并得到广泛的应用。激光全息防伪标识的风行是由于这种标识的制造有着较高的技术含量和必需的先进技术设备，不是普通印刷设备在小作坊里能够生产的，对于整顿当前的产品质量。打假治劣有着积极的作用。粘接技术在较高全息防伪产品制造工艺中有重要地位，下面分两方面予以介绍。2粘接技术在激光彩虹模压全息标识上的应用目前在防伪标识应用上主要是激光彩虹模压全息标识，它的基本结构组成如图。图激光彩虹模压全息标识构成示意图1．基材（…     

高效激光全息模压版清洗剂的研制

激光全息防伪材料的防伪信息通过模压工艺完成信息从镍版到材料的转移。模压过程中,镍版不可避免会粘附一些高分子树脂,这些粘附的污渍会遮盖模压版上的激光全息信息,从而影响激光全息信息的压印转移。全息镍版重复使用的要求是污渍去除率必须达到90%以上。通过表面活性剂与增溶剂复配,成功研制一种适于激光全息模压版清洗的高效清洗剂。当辛基酚聚氧乙烯醚(OPE)、脂肪醇聚氧乙烯醚(AEO)、N,N'-双油酰基乙二胺二乙磺酸钠(DTM)和乙二醇单丁醚(EB)的物质的量的比为2∶1∶0.6∶3时,清洗剂综合性能较好。     

用于激光全息防伪技术的含氟共聚物粘接剂

介绍了用于激光全息防伪技术的含氟粘接剂的制备方法．着重探讨了粘接剂的氟含量与涂膜的透明度、反射效率、折射率调制等光学性能之间的关系，其聚物氟含量的控制方法及相应的共聚条件。     

可重复利用激光全息转移膜的研制

采用PET/BOPP复合膜为基膜,以聚四氟乙烯微粉改性的复合涂料为全息信息记录材料,烘干成膜后模压激光全息防伪信息,再真空镀铝,得到铝层转移效果良好的激光全息转移膜。该转移膜可以重复镀铝多次转移,有效降低了生产成本,并提高了生产效率。     

高透明聚氨酯胶粘剂的合成与应用

以二环己基甲烷二异氰酸酯(HMDI)、异佛尔酮二异氰酸酯(IPDI)与聚己内酯多元醇(PCL)、聚四氢呋喃醚二醇(PTME)、聚醚二醇为原料,合成了高透明聚氨酯胶粘剂,测试了胶粘剂的性能。使用高透明聚氨酯胶粘剂在有机玻璃上粘接高透明聚氨酯薄膜制成防护层,并对防护层进行耐热、耐紫外老化、耐磨等性能测试。结果表明:胶粘剂具有良好的附着力和光学性能,还具有良好的耐热性、耐紫外老化性能和较好的耐水性。防护层可以有效降低风砂对有机玻璃表面造成的冲蚀磨损,具有优异的耐风砂防护效果。     

新型玻璃塑料复合材料纷纷问世

英国一家飞机制造公司发明了一种用于飞机上的打不碎玻璃，它是一种夹有碎屑粘合成透明塑料薄膜的多层玻璃。这种以聚氨酯为基础的塑料薄膜具有粘滞的半液态稠度，当有人试图打碎它时，受打击的聚氨酯薄膜会慢慢聚集在一起，并恢复自己特有的整体性。     

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。