用于文化纸机最有效的压榨技术——靴式压榨

适用于文化纸机的第一种靴式压榨概念提出于1994年，最早是应用于新闻纸机。当时在干燥部前连续压榨后通过靴式压榨可以很好的提高纸张的干度。靴式压榨具有以下众多优点：可以很好的替代现有的独立压榨；出压榨后纸张干度高；适用于高速纸机；节省蒸汽用量、投资回收期短等。尽管第一种靴式压榨概念也存在一些缺点，     

高速卫生纸机靴式压榨系统简介

本文从靴式压榨的概念、NipcoFlex T靴式压榨的结构、工作流程和生产实践等方面介绍了高速卫生纸机靴式压榨系统。     

介绍一种全新的双压区压榨--Nipcoflex

本介绍了最新式的靴式压榨－双压区靴式压榨,与四辊三压区靴式压榨相比,由于采用了全闭无张力引纸浆压部断纸的可能性几乎降为零,出压榨干度提高,由于采用了双压区,靴辊上下放置,纸页两面差更小。     

Heimbach公司新增靴式压榨带系列产品

日前Heimbach公司宣布与Yamauchi公司达成独家经销协议,向欧洲纸厂提供Yamabelt靴式压榨带（靴式压榨包覆层）。随着现代化纸机越来越多地采用靴式压榨技术,Heimbach公司将在纸机织物系列产品和Webmover传送带中新增靴式压榨带供消费者选择。     

高速纸机上靴套的安装与使用

靴套是靴式压榨的易损件。正确安装和使用对提高纸机效率、降低生产成本十分重要。齐齐哈尔造纸有限公司引进的芬兰Metso集团OptiConcept纸机上配有靴式压榨。本文介绍了靴套的安装和使用经验，提出了常见问题的产生原因和解决办法。     

纸机压榨技术的新进展

近年纸机压榨部最基本的变化可能是靴式压榨（ｓｈｏｅｐｒｅｓｓ）的引入。虽然靴式压榨技术已在某些造纸产品，如箱纸板和瓦楞原纸的应用中确立，但近年在文化用纸领域的应用特别引人注目。据德国造纸设备供应商ＶｏｉｔｈＳｕｌｚｅｒ公司报道，全世界到１９９８年８月已有３５套靴式压榨应用于文化用纸，到１９９９年８月还可能成倍地增长。１９９８年ＶｏｉｔｈＳｕｌｚｅｒ公司又推出一种新型压榨———ＴａｎｄｅｒｎＮｉｐｃｏＦｌｅｘ，其中ＮｉｐｃｏＦｌｅｘ是靴式压榨原设计的名称。这套新型压榨已由德国的２家造纸公司订购，估…     

功能强大的靴式压榨技术

靴式压榨可用来生产各种纸和纸板.对不同的纸,靴式压榨赋予纸张的特性是不同的,对某些纸张,靴式压榨可同时提高其各种重要的性质,这是其他压榨技术不可比的.     

一种造纸机靴式压辊

正申请公布号:CN 112127196 A发明人:章闰平黄冬冬陈建申请人:章闰平靴式压榨改进了以往线压力压区小、脱水效率低的缺陷,采用靴式的宽区压榨,脱水效率明显提高。但现有的造纸机靴式压辊存在一定的缺陷:(1)靴式压榨虽然有更好的脱水效果,但靴压辊中下凹的靴压区使得湿纸在进入和离开压区时受到较大的张力,     

靴式压榨对高级纸特性的影响

为调整靴式压榨对湿纸页固形物含量和高级纸特性影响,在中试纸机上进行了一系列试验,纸机运行速度为600m/min和700m/min,靴式压榨压区负荷为50～700kN/m。高级纸在通过轻负荷的两辊压榨和一个靴式压榨后,可获得较好的松厚度和45％的固形物含量。当纸页通过四道重负荷压榨,其中一个是靴式压榨时,其固形物含量超过了47％,但与通过轻压的三辊压榨机相比,松厚度低10％。压榨到相同的固含量时,与只采用辊式压榨相比,纸页经过靴式压榨具有更高松厚度和不透明度,但较低的Scott结合力和强度。在安装新纸机和对现有高级纸机进行改造时,应考虑使用靴式压榨,因为这种压榨机能将纸页压榨到高固形物含量而产品的松厚度下降较少。     

新纸机压榨部采用靴型压榨--LWC改造项目国际新技术消化吸收

本文叙述了几家外商推荐的靴型压榨结构和多种设计方案，比较了它和辊式压榨在脱水性能和对产品质量所产生影响的区别，以及比较了四辊或五辊三压区的第三压区采用靴型压榨的方案和直通式二道或一道靴型压榨方案。采用什么方案，要从品种、车速、机台整体水平、对产品质量的要求，做一全面衡量来选择。     

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