圆筒蒸锅在粘胶丝织物平网活性印花中的应用

介绍圆筒蒸锅的特点，及在粘胶织物活性平网印花后的蒸化工艺中的应用。分析了印浆中染料、糊料、尿素、碱剂和防染盐对蒸化效果的影响，结合生产实践，提出采用圈挂法，蒸化条件为压力0．8kg,／cm^2，时间30min。     

棉机织物的山茶天然染料印花

分别以硫酸锌、明矾、硫酸亚铁为媒染剂,瓜尔豆胶、羧甲基纤维素钠、黄原胶、海藻酸钠为原糊,探究山茶天然染料印花工艺。分析了媒染剂对原糊的相容性,研究了媒染剂用量、蒸化温度、蒸化时间、染料用量对印花效果的影响,测得印花织物的K/S值和色牢度。试验结果表明:硫酸亚铁对瓜尔豆胶原糊的黏度及储存稳定性基本没有影响,瓜尔豆胶用于山茶天然染料棉机织物印花具有良好的给色性和渗透性。在硫酸亚铁1.6%(omf),蒸化温度110℃,蒸化时间20 min,染料1.6%(omf)的最佳工艺条件下,印花棉机织物的耐摩擦色牢度和耐皂洗色牢度都达到4级以上。     

微弹记忆面料

针对市场上记忆面料存在的手感板硬、舒适性差和生产难度大的情况,采用PTT记忆丝与PET异形长丝复合,开发了微弹记忆面料.在原料选用上,采用PTT和PET长丝,巧妙地将其长丝捻度、织物紧度与染整工艺相结合,得到记忆效果明显的织物.文中阐述了结构设计、织造生产及染色后整理各工序的关键技术.     

二醋酯/棉混纺面料的印花工艺

研究二醋酯/棉混纺织物的印花性能,得出最佳印花工艺.分散/活性染料一浴印花工艺配方为:染料(上海雅运雅格鑫系列)0％～2％,防染盐1％,小苏打2％,尿素5％,海藻酸钠糊50％,其余为水.最佳工艺流程为:称料→化料→刮样→烘干→焙烘→蒸化→热水洗→皂洗→水洗→熨干.最佳蒸化工艺为:102℃,8 min.面料经过后整理后,...     

羊绒织物的数码印花工艺探讨

在总结山羊绒分子的组成和截面结构对酸、碱、热反应特征及影响的基础上,分析了羊绒面料结构性能和数码印花的关系,研究了羊绒面料对数码印花色彩的实现机理和特殊要求,从羊绒织物前处理、喷印、蒸化等工序中优化了数码印花的集成配套工艺流程和重点参数,找出印花喷头、印花速度、喷头高度和浆料p H值等影响印花效果的关键因素,通过实验验证,最终总结出了适合高端羊绒面料的数码印花整套工艺,实现了羊绒织物的高档化和高效化的数码印花。     

真丝织物低尿素活性染料喷墨印花工艺研究

为了降低印花工艺中尿素对环境的影响,以再生利用的活性墨水红和活性墨水黑为印花染料,比较了尿素、三甘醇、丙三醇等不同吸湿膨化剂对真丝织物数码喷墨印花的K/S值、渗化度及固色效率的影响;其次,探讨了低尿素状态下不同质量分数的糊料、碳酸氢钠、硫酸钠及蒸化条件对印花效果的影响。研究发现,三甘醇作为助溶剂可部分代替尿素,当吸湿膨化剂(质量比为3︰7)8%、自制糊料6%、碳酸氢钠3%、硫酸钠5%时,102℃蒸化30 min,印花效果较好。印花织物的耐水洗色牢度和耐摩擦色牢度均达到3级以上。     

塔丝隆织物的喷墨印花工艺条件优化

用酸性染料墨水对塔丝隆锦纶织物喷墨印花.探讨了酸性印花糊料、尿素、硫酸铵、蒸化时间和固色剂对印花得色量的影响,优化了喷墨印花工艺条件,测试了青、黄、品红和黑4种颜色喷印织物的各项色牢度和K/S值.结果表明:酸性印花糊料用量1.0%,尿素用量3%,硫酸铵用量1.5%,蒸化时间30~40 min,固色剂用量1.5%,塔丝隆锦纶织物的喷墨印花表观得色量K/S值可达70以上,水洗牢度、日晒牢度和干摩擦色牢度均可达到4级以上.     

纤维素纤维织物活性染料微波固色印花工艺研究

采用微波法对活性染料印花织物进行固色。相比蒸化固色,微波固色具有时间短、耗能低、无需使用尿素的优点。结果表明,微波固色在小苏打用量为3%、微波功率为1 600 W和微波3 min的条件下,活性染料印花织物的K/S值和固色率能达到蒸化固色的最佳效果,并且色光和色牢度满足生产要求。     

提高纯棉印花织物摩擦色牢度的实践

纯棉深色产品用活性染料印花时,湿摩擦牢度欠佳.为此试验了烧毛质量、退浆级别、毛效、丝光钡值、蒸化条件、水洗条件及染化料对棉织物活性印花色牢度的影响.结果表明,半成品的烧毛级别4～5级、退浆级别7级、毛效10～12 cm/30 min、丝光钡值130,蒸化条件为102～103℃×9 min,水洗时采用弱酸性或中性条件下大冷流水冲洗,则活性印花织物的湿摩擦牢度能够满足一般客户要求.     

天丝毛绒混纺织物印花工艺研究

由于羊毛、羊绒与天丝在结构和性能上的差异,使同一染料对这两种纤维发生竞染,对其纺织品印花时很难达到丝绒同色。比较了天丝毛绒混纺织物印花同色性,通过分析染料用量、碱剂用量、释酸剂用量、蒸化时间等因素对印花牢度的影响,得出天丝毛绒混纺织物印花的最佳工艺:染料x%、尿素3%、印花油3%、消泡剂1%、匀染剂1%、助溶剂1%~2%、释酸剂4%~6%,碱剂0.1%、蒸化温度95~105℃、蒸化时间50~60 min。采用兰纳洒脱和诺威克隆-FN染料混拼对天丝毛绒混纺织物进行印花,同色性好,色泽艳丽,色牢度符合国标要求。     

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