再用棉纺彩点纱的制备及特性分析

为提高色纺纱产品附加值,利用再用棉生产彩点纱。在3个品种采用不同再用棉种类和混用比例进行纺纱试验,并对成纱性能和布面再用棉分布状况进行了分析测试。结果表明:随着再用棉比例的增加,成纱条干变差,强力降低,布面横档逐渐增加;再用棉的种类和混用比例是影响彩点纱质量和面料风格的关键因素;纱号越粗,再用棉对布面横档的影响越明显。认为:利用本色再用棉生产的色纺彩点纱具有风格独特、彩点粘附牢度好、生产成本低的特点,可纺制出质量满足要求的色纺彩点纱。     

采用环锭纺纱新技术开发新颖色纺纱

采用环锭纺纱新技术开发色纺纱新产品。改变传统色纺纱仅仅依靠颜色、原料变化,更多的是色纺纱纱线结构变化、组合。文章分析了色纺AB纱、色纺ab纱、紧密赛络纺技术生产色纺纱、色纺竹节纱、粉尘纱、点子纱、色纺段彩纺、色纺隆纹纱等8种纱生产的原理、纱线风格及应用,以及生产过程中的对色、质量控制等注意事项。     

色纺段彩纱的概念及工艺参数计算

纺织行业中对于色纺段彩纱所涉及的概念、参数尚不统一,影响着技术人员之间的交流。对色纺段彩纱的基本概念进行了梳理,并给出了使用建议;描述了段彩纱生产的控制原理;推导了常用参数的计算公式;分析了影响段彩纱设计风格的因素,并给出设计实例。     

为您从纱线开发到针织面料生产——来顶替进口面料和新特流行面料

我们浙江省之江棉纺织厂和中外合资浙江亚星染纱有限公司是集纺纱、筒子染色纱、间段染色纱、针织面料为一体的生产实体。　　棉纺拥有国内最先进的清梳联和ＦＡ系列流水线,专业生产国外最新流行面料的纱线以及国内领导市场的新型纱线。产品有国内独创的条子染色全棉色纺精梳纱线、涤棉色纺精梳纱线、棉腈色纺精梳纱线。天然丝羊绒纱线、天然丝亚麻纱、天然丝棉纱。以及选用国内外新型纤维生产的闪光纱、钻石彩色纱、ＡＢ纱、珍珠彩点纱……　　筒子染色产品有全棉筒子色纱、涤棉筒子色纱、棉腈筒子色纱、棉麻筒子色纱,还有独具一格的绢丝筒…     

为您从纱线开发到针织面料生产——来顶替进口面料和新特流行面料

我们浙江省之江棉纺织厂和中外合资浙江亚星染纱有限公司是集纺纱、筒子染色纱、间段染色纱、针织面料为一体的生产实体。　　棉纺拥有国内最先进的清梳联和ＦＡ系列流水线 ,专业生产国外最新流行面料的纱线以及国内领导市场的新型纱线。产品有国内独创的条子染色全棉色纺精梳纱线、涤棉色纺精梳纱线、棉腈色纺精梳纱线。天然丝羊绒纱线、天然丝亚麻纱、天然丝棉纱。以及选用国内外新型纤维生产的闪光纱、钻石彩色纱、ＡＢ纱、珍珠彩点纱……　　筒子染色产品有全棉筒子色纱、涤棉筒子色纱、棉腈筒子色纱、棉麻筒子色纱 ,还有独具一格的绢丝…     

赛络纺缎彩纱质量控制体会

为开发赛络纺缎彩纱,通过分析赛络纺缎彩纱的纺纱原理及特点,对细纱机进行了相关改造,针对纺纱过程中出现的色差、缺股、粗细节纱、有色纤维混入本色纱线等问题采取了一系列措施,使赛络纺缎彩纱得以顺利生产.指出:赛络纺缎彩纱具有独特的风格,但生产中质量控制有一定难度.只有从原料、工艺、管理等各方面采取有效措施才能生产出高质量的纱线.     

转杯断续复合色纺纱的研制

在转杯纺纱机上,从喇叭口与棉条一起喂入若干根有色饰纱,利用转杯纺的分梳牵伸作用实现对有色饰纱的切断,形成具有段彩或彩点效果的断续复合色纱;通过对转杯断彩复合纱彩点的个数、长度、间距的分析,找出影响段彩效果的因素,对纺制工艺进行优化设计。结果表明:喂入饰纱根数不能超过3根,随着喂入饰纱根数的增加,转杯段彩复合纱的段彩外观效果越明显,单位长度内彩点个数呈下降趋势,彩点平均长度随之增加,彩点间平均间距不断减少。在纺纱工艺上分梳辊转速是影响顺利纺纱的关键因素。     

浅谈色纺梳理、牵伸及差异化产品开发

为了研究色纺技术、提高产品竞争力,分析了色纺原料选配与产品要求等特征,以纯棉或纯棉为主的产品、涤棉混纺产品、粘胶或粘棉混纺产品3种典型色纺产品为例,阐述选配梳棉器材和制订梳理工艺应遵循的原则;探讨从多方位采取措施缓解色纺胶辊适纺性差、易老化等问题的方法;通过对段彩纱、丝雨纱、丝彩纱产品技术的剖析说明色纺差异化产品开发离不开器材、专件的技术支撑。指出,针对色纺以有色纤维、棉网为原料及棉与化纤混合投料的原料选配方法和多品种小批量的特征,应采用相适应的梳理工艺原则,从胶辊选型、制作等多方位采取措施,不能简单套用普通本色纺纱的工艺方法和器材选配原则。     

牦牛绒/长绒棉赛络纺段彩纱的工艺探讨与试纺

介绍了一种14.7 tex牦牛绒/长绒棉赛络纺段彩纱的纺纱工艺。结合赛络纺段彩纱的成纱原理,选择两种不同原料,开发了3种不同风格的赛络纺段彩纱,并对其成纱质量进行测试分析。结果表明,采用赛络纺技术可以生产出成纱质量良好的牦牛绒/长绒棉段彩纱。     

中高支粗纺羊绒彩点纱的纺制

研究了通过在羊绒纱线中加入彩色点子的方法,生产出具有特殊效果的羊绒纱线.中高支粗纺羊绒彩点纱的纺制具有一定的技术难度,文章对彩色点子的生产以及和毛、梳毛、纺纱、络筒等工艺进行了探讨,重点讨论了羊绒彩点纱的加工工艺.此研究为羊绒产品的设计开发注入了新的活力,开发出了一种比较理想的面料.     

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