羊短绒K—Ⅱ实践浅析

提出羊短绒K-Ⅱ纺织制衣工艺方法-在羊绒超短纤维中掺和可溶性维纶纺纱、织造、经水热溶解整理后,分别制成核心维纶粘合的双面羊绒织物和纯细羊绒织物,文章对这种纺纱、织造、溶解维纶的工艺等作了实践探索的论述。     

水溶性纤维在羊绒水纹围巾上的应用

选用适当的比例的水溶性维纶纤维与羊绒纤维混纺，可以提高纺纱支数，降低成本。文章主要介绍了羊绒与水溶性纤维伴纺生产羊绒围巾，采用新的尝试在纺纱后去除维纶纤维，然后织造再进行后整理加工羊绒围巾，使围巾获得丰满的手感，弹性十足，悬垂性好。     

超短羊绒纤维强物的开发

我国是世界上优质山羊绒的主要产地,山羊绒制品可谓天然纤维中的纺织佳品,然而在山羊绒精纺过程中所落下的超短纤维,不但细度细、而且质量好,只因为长度太短,致使纺纱困难而作为下脚料另作它用,这是一种资源浪费。1997年,我们开始研究羊短绒纺织技术,即将羊绒超短纤维与可溶性维纶混和纺纱,织造后在水中加热,使维纶粘合于布料核心或全部溶解维纶,最终生产出拉伸佳、触感柔软的新颖毛织物———核心维纶粘合的双面羊绒织物和纯细羊绒织物。1　原料检测情况1.1　超短羊绒纤维羊绒超短纤维原料含油量为1.65%;平均细度为12.6μｍ,变异系数17.3;…     

废弃羊绒制品的纤维再生与利用

如何将废弃羊绒制品进行纤维再生,做到循环利用,是节约资源、打造绿色经济的有效途径。文章以废弃羊绒制品为原料,将其还原为再生绒纤维,并根据再生羊绒纤维性能,选用环锭纺及转杯纺2种不同的纺纱系统与工艺,纺制羊绒/天丝混纺纱线并织成新的产品,测试比较所纺纱线及其织物的性能。实验证明:羊绒织物再生纤维具有可纺性,成纱品质优良,织物较好保留了羊绒的风格特征,有较高的经济开发价值和产业推广前景。     

阻燃维纶转杯纱的纺制体会

探讨利用转杯纺纱机纺制阻燃维纶纯纺纱的可行性及纺纱工艺.通过纺制阻燃维纶纤维69.5tex、90.8 tex、107.4 tex纯纺纱,分析了纺纱中存在的问题,介绍了各工序工艺配置情况及采取的相应技术措施.实践表明,针对阻燃维纶纤维静电严重造成纺纱缠绕的问题,纺纱前要对阻燃维纶纤维加抗静电剂进行处理,梳棉工序适当降低梳理速度、合理配置针布、调整好各部位梳理隔距,并条工序采用处理胶辊并结合重加压,适当降低车速,转杯纺工序降低车速,同时加强各工序车间温湿度管理,可以保证纺纱顺利进行和成纱质量的稳定.     

用水溶性维纶伴纺高支羊绒/Modal产品

采用水溶性维纶伴纺技术生产的高支轻薄羊绒/Modal产品轻薄滑爽,手感柔软,悬垂性好,服用性能优良,而且生产成本低。文章对纤维的各项性能进行了分析,并重点介绍了纺纱各工序的关键工艺与措施。     

转杯纺加工聚丙烯腈预氧化纤维纱的工艺探讨

聚丙烯腈预氧化纤维是一种耐高温纤维，在防火、阻燃产品领域具有广泛的应用前景，但由于其本身的特性使其在环锭纺纱系统中的可纺性能较差，故采用转杯纺纱技术纺制纱线，提高了可纺性能和改善纱线性能。文章研究了转杯纺主要工艺参数与成纱质量的关系，通过合理选择工艺参数，可以提高聚丙烯腈预氧化纤维的成纱质量。     

天丝/羊绒/绢丝转杯纺18.5tex针织纱的开发

主要介绍采用转杯纺开发天丝/羊绒/绢丝针织纱的工艺过程。因3种纤维都具有较好的光泽和手感,将其按合理的比例搭配,既降低了成本又保持了其高贵典雅、舒适的特性。通过优化设计选择适当的混纺比、合理的原料混和方式、工艺流程、原料预处理方法,正确配置各工序纺纱工艺参数以及采取必要的技术措施,有效解决纺纱过程中羊绒、绢丝纤维静电严重、易缠绕等问题。经测试,试纺制得的天丝/羊绒/绢丝70/15/15转杯纺18.5 tex针织纱成纱质量良好,各项指标均达到使用要求。     

PVA纤维与羊绒混纺纱的纺纱工艺研究

为使羊绒产品更具高档化、轻薄化及高附加值,研究了在复精梳工艺过程中,将混条工序羊绒、羊毛条加入合适比例的水溶性纤维,以增加纱线强度,提高纱线的可纺性与织造效率的工艺方法;提出了含维羊绒产品在纺纱过程中,需要选择最佳试纺工艺。羊绒、高支羊毛与维纶纤维的合理混和比例,及混条、复精梳、蒸纱等关键生产工序严格把关,严格控制混条的含油、回潮及羊绒落绒率等应该注意的有关技术问题及相应措施。     

转杯纺竹节纱的产品开发与工艺探讨

结合生产实践，通过工艺实验，分析了纤维性能、纺纱工艺等因素对转杯纺竹节纱质量的影响，探讨了生产转杯纺竹节纱的工艺措施。     

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