双毛毯、压区宽度和Nipco辊的探讨 埃旭维斯公司多层纸板机压榨部发展技术状况

所谓多层纸板是指定量较大的纸张,诸如灰色纸板、石膏纸板、箱纸板各种容器用纸板,有时还包括瓦楞纸和包装纸。当纸机速度在较低的正常范围内时,其产量可高达1000t/24h。图1所示系生产这些产品时纸     

基于无迹卡尔曼滤波的运动机器人定位研究

机器人运动控制中,由于传感器获取的位置信息存在误差,导致运动机器人存在定位误差的问题。为避免定位的失准,提出一种基于无迹卡尔曼滤波的定位方法。根据传感器获取机器人在地图中位置信息,与前一时刻机器人位置、姿态、控制量进行位置的预测、检验、更新,最终获取当前时刻机器人准确位置,实验在ROS机器人实时操作系统下进行,实现了室内行走机器人的准确定位。结果表明方法对于室内运动机器人定位有效。     

无锡荣成纸业新的纸板机投入试运行

无锡荣成纸业瓦楞纸机已经开始试运行。以废纸为原料,每天的生产能力为600t,预定在2004年1月正式投产。该纸机是#2机,在8月份生产出了5000t以废纸为原料的瓦楞芯纸,9月份的目标是生产10000t。该公司2004年将#2纸机产品升级,使其既能生产瓦楞纸,又能生产挂面废纸纸板。这一计划的实施将根据中国纸板市场的状况而定。无锡荣成纸业在8月5日#2纸机开始试运行后,关闭了7台小瓦楞纸机,只有#1纸机仍在生产。这台纸机每年能生产12万t的牛皮挂面纸和挂面废纸纸板。台湾荣成纸业占有无锡荣成纸业的过半数股份,荣成的附属公司YueLi机械提供#2机的纸机…     

华一公司又获越南西贡定单 提供200吨／日废纸制浆生产线

今年7月，越南西贡造纸股份公司又新上一条200吨/日的纸板浆生产线，利用废旧瓦楞纸箱生产牛皮箱纸板和高强瓦楞纸。     

美卓向中国广州纸业集团提供印刷纸机生产线

3月22日，新加坡消息：台湾最大的纸和纸板生产商——永丰余纸业公司改变其在大陆瓦楞纸厂设计规划。     

我国增加从美国进口旧瓦楞纸的份额

在2006年的前4个月中，我国对美国旧瓦楞纸的进口份额显著增加，比去年增长了31％，其增加量为22万t。在我国，大批量废挂面纸板和瓦楞原纸新纸机的安装（其中包括2007年计划安装的8台纸机）导致了我国对美国旧瓦楞纸的进口量继续增加。     

浅谈近期我国纸板产业发展的趋势

近年来我国板纸产业发展很快,2002年我国纸板的产量达1660万吨,占我国纸和纸板总产量的43.9%,文章着重介绍了CWB,CSB,CKB和瓦楞纸的发展和二次纤维的利用.     

斯道拉恩索推出90g／m^2单面涂布挂面纸板

斯道拉恩索新推出的高撕裂度LumiLiner挂面纸板专为瓦楞纸行业量身定制,其背面具有良好的胶黏性。斯道拉恩索是世界顶级的纸张生产商,在与纸包装生产商密切合作的基础上开发出了定量90g／m^2。的单面涂布挂面纸板。这种挂面纸板具有轻质纸的柔软性和松厚度,也具有高定量纸的撕裂度。     

瓦楞合纸生产故障与解决对策(上)

<正>平整的彩色瓦楞纸板对彩盒质量十分重要。在合纸工序中,上道工序转来的印刷纸(以下简称上纸)和单面瓦楞纸(以下简称下纸)被机器涂胶后压合在一起,此时被加工合成的纸板内应力发生急剧变化,会引发合成纸板的弯曲起翘。广义上说,纸板翘曲是由纸板上下组合结构(上层面纸、瓦楞芯纸、下层底纸)尺寸大小的不均匀变化造成的。仔细观察会发现,在瓦楞楞顶和上下纸牢固黏合且     

以废纸为原料生产瓦楞芯纸和挂面纸板

在联邦德国只有一个纸厂生产半化学浆和瓦楞纸原纸,其它瓦楞纸生产厂均以废纸为原料。有关瓦楞纸的定义及其标准,如图1所示。瓦楞芯纸和挂面纸板是根据它们所用原材料配比而定的。半化学浆瓦楞芯纸一般是以桦木为原料,这种纸叫做瓦楞原纸。联邦德国生产半化学浆的纸厂一般用山毛榉木为原料,其它纸厂均用废纸作原料。挂面层可分成牛皮纸板和挂面废纸纸板两大类。前者是用硫酸盐纸浆为原料。挂面     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press