拉细羊毛的性能及生产工艺研究

公司应用国际当今最新OPTIM拉细羊毛纤维，结合领先的纺织、染整设备，独特的生产工艺设计，先进的加工整理手段，对拉细羊毛的纤维性质、染色工艺、混纺比例、加工技术、产品开发做了较为全面的研究、分析和试验，通过措施的细化、完善，工艺的优化、调整，掌握了拉细羊毛与不同性质的原料混纺及不同含量拉细羊毛产品的加工生产技术，并行之有效，对同行有很好的借鉴作用。     

拉细羊毛及其混纺毛条的加工性能

通过对拉细羊毛及其混纺毛条纤维特征的测试 ,探讨了拉细羊毛纤维的一些重要性能特征及对加工性能的影响。实际生产证明 :在掌握拉细羊毛或混纺纤维的性能特征后 ,对现有加工工艺作出适当调整 ,可达到一定的质量要求     

山羊绒/Optim纤维混纺针织纱的开发

文章分析了山羊绒和拉细羊毛Optim的性能及特点,围绕Optim纤维与山羊绒混纺针织纱的产品开发,讨论了复精梳工艺、前纺及细纱各工序在生产中存在的问题,并提供了解决方法;同时讨论了各工序工艺参数的选择及复精梳后再混入羊绒的原因.该工艺可充分发挥2种纤维的特性,为拉细羊毛纤维的产品开发提供借鉴.     

拉细羊毛与天然超细支羊毛织物的产品特性分析与比较

文章以生产纯毛高支单面哔叽为例,分析比较了拉细羊毛纤维与普通超细支羊毛纤维生产高支轻薄毛精纺面料的工艺重点及织物风格.分析结果表明:由于拉细羊毛纤维外观和结构的变化,使其性能特点与常规羊毛有所不同,从而赋予织物不同的风格特征.提出,若将2种纤维进行混纺,可充分发挥纤维自身优势互补的特性,改善其加工性能及面料的服用性能.     

文摘精粹

拉细羊毛及其混纺毛条的加工性能李伟(东华大学纺织学院),王维(兰州三毛实业股份有限公司)等∥纺织学报中国纺织工程学会.—2004,25(4).—34～35通过对拉细羊毛及其混纺毛条纤维特征的测试,探讨了拉细羊毛纤维的一些重要性能特征及对加工性能的影响。实际生产证明:在掌握拉细羊     

超细羊毛和拉细羊毛纱线张力控制

超细羊毛及拉细羊毛混纺纱线强力低,断裂伸长差,细节偏多,后道加工难度大。对比了超细羊毛及拉细羊毛混纺纱线的性能,总结出了整经、织造工序加工要点。通过细化措施,优化工艺,尽可能减少对纤维的损伤,实现整经、织造张力的有效控制,从而大幅度减少了织疵,提高了织机效率,为生产实践提供了一些借鉴。     

拉细羊毛织物性能的客观评价

对拉细羊毛(Optim)及其织物的性能进行了介绍,利用Siro-FAST系统对拉细羊毛织物及其对比产品进行了客观检验和评价.结果表明,拉细羊毛与羊毛纤维进行混纺后,其面料的性能较佳,能够满足制衣业对面料缝制质量的要求.此外,利用FAST测试结果可对面料性能与染整工艺之间的关系进行分析和探讨,为拉细羊毛产品的开发及服装加工提供借鉴.     

拉细羊毛纤维的特征和产品加工性能

通过对新型改性羊毛纤维——拉细羊毛纤维与其它动物纤维性能的测试对比，表明拉细羊毛纤维的细度、长度特征和强伸性均不同于其它纤维，具有丝纤维和羊绒纤维的部分特征，从而为拉细羊毛纤维的生产加工和产品开发提供一些借鉴。加工研究和生产实践表明，从拉细羊毛纤维特征和性能而言，其加工性能较普通羊毛纤维难度大，其中染色是关键技术之一。此外，产品风格更接近丝毛纤维产品的风格和特征。     

OPTIM纤维混纺针织纱的开发生产

分析了拉细羊毛OPTIM的性能及特点，围绕OPTIM纤维与绢丝、羊绒混纺针织纱的产品开发，从油剂的选用与加入、复精梳工艺、翠湿度控制及皮辊的处理等方面介绍了生产中存在的难点，并提供了一些解决这些难点的方法。     

拉细羊毛及其混纺织物的结构与光泽

针对拉细羊毛(Optim)纤维纯纺及其混纺织物,应用扫描电子显微镜观察拉细羊毛及其织物的表观形态结构,测试了织物压缩性和织物的光泽,进行了织物因子聚类分析。研究结果表明:拉细羊毛织物的纤维卷曲少,纤维由椭圆形变成略带多边形,鳞片间距变大;织物内纱线纤维挤得比较紧,织物压缩平均厚度值小,表面厚度较小;织物的正反射、漫反射光强和对比光泽度较大,呈现良好的光泽和平滑性。织物因子聚类分析表明:纯拉细羊毛织物处于细羊毛和羊毛/蚕丝混纺织物之间,拉细羊毛织物具有丝般光泽。     

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