活性染料数码喷墨印花墨水的研制

选用活性染料制备数码喷墨印花墨水。通过测试墨水的染料粒径、黏度、表面张力和导电率等,分析了喷墨印花墨水性能与染料质量分数和各种添加剂种类及用量的关系,得到优化的数码喷墨印花墨水工艺配方为:活性染料10%～15%、增溶剂尿素10%～5%、乙二醇与二甘醇(质量比为2∶1)25%～35%、pH值调节剂1.0%～1.4%,加去离子水至100%。     

分散染料数码喷墨印花墨水的配方研究

选用分散染料制备数码喷墨印花墨水,并测试墨水的染料粒径、黏度、表面张力和电导率等特性,分析了喷墨印花墨水性能与染料用量、添加剂种类及用量的关系,得到了数码喷墨印花墨水的有效工艺配方。分散染料色浆配方为:分散染料10%～15%、分散剂10%～15%、二甘醇15%～25%,最后加去离子水至100%;自制分散染料数码喷墨印花墨水配方为:分散染料色浆25%～35%、丙三醇或乙二醇10%～25%、三乙醇胺1.0%～1.4%、聚乙二醇5%～15%,最后加去离子水至100%。经过初步核算,自制分散染料数码喷墨印花墨水的成本约为市售商品墨水的1/3。     

羊毛/貂绒混纺产品的染色

选取弱酸性染料、金属络合染料和活性染料对羊毛/貂绒混纺产品进行染色,分别采用分浴和同浴两种方法。采用正交实验对染液用量、硫酸钠用量和pH进行优化,测试染色后织物的上染率、色差和固色率。弱酸性染料分浴上染羊毛貂绒纤维的最佳工艺为:染料用量3%,硫酸钠用量10%,pH为5;同浴染色工艺:染料用量5%,硫酸钠用量12%,pH=4。金属络合染料分浴上染最佳工艺为:染料用量5%,硫酸钠用量10%,pH=3;同浴染色工艺:染料用量3%,硫酸钠用量10%,pH=5。活性染料分浴与同浴上染最佳工艺均为染料用量5%,硫酸钠用量12%,pH=4。     

真丝织物活性染料墨水数码直喷印花上浆预处理工艺研究

为了提高真丝织物活性染料墨水数码直喷印花的表观得色量和图案清晰度,选取两种糊料对真丝织物进行上浆预处理,分析了不同种类、质量分数上浆糊料对真丝织物的活性染料墨水数码印花效果.结果表明,采用CMC 3％、碳酸氢钠3％、尿素8％、硫酸钠5％的上浆预处理配方对真丝织物进行上浆预处理后,可得到较高的活性染料墨水数码印花表观得色...     

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。     

印花用高稳定性活性深蓝的开发及应用性能

为了解决市场现有活性深蓝KR存在的印花工艺不稳定、固色率低和印花织物产生渗色的问题,开发了适用于印花工艺的高稳定性活性深蓝PRB,考察了染料的提升性能以及尿素用量、蒸化湿度和蒸化时间对染料稳定性能的影响。结果表明,该支活性染料对尿素用量及蒸化湿度依存性小,工艺变化对其影响较低;将该支染料用于棉和黏胶纤维织物时,染料在棉和黏胶纤维织物上的固色率达到75.0%左右,比市场现有活性深蓝KR高15.0%左右;白布沾色牢度为4级,比活性深蓝KR提高2级,印花织物边缘清晰,无渗色现象。     

罗布麻/棉织物硅基非水介质活性染料染色北大核心

罗布麻/棉混纺针织物采用活性红3BS在硅基非水介质中染色。通过单因素试验分析硫酸钠用量、染色温度、染色时间和碳酸钠用量对K/S值、上染率和固色率的影响,再用正交试验优化染色工艺。优化后的非水介质染色工艺为:20.0%(omf)硫酸钠、染色温度70℃、染色时间80 min、4.0%(omf)碳酸钠。该工艺条件下,染料上染率98.8%,固色率70.7%,K/S值3.5。与传统水浴染色相比,硅基非水介质活性染料染色水、盐和碱用量少,且染色K/S值更高。硅基非水介质活性染料染色织物的耐皂洗色牢度和耐摩擦色牢度均在4级及以上。     

桑蚕丝织物的数码印花工艺

为提高桑蚕丝织物数码印花的得色量及手感,对桑蚕丝织物活性染料数码印花工艺进行了研究,探讨了前处理上浆配方对丝绸织物数码印花得色量的影响以及汽蒸、水洗工艺参数对青、品红、黄、黑4种颜色印花得色量的影响,测试了该处理条件下产品的色牢度,并评价其印花效果。结果表明:汽蒸时间为30 min时得色量较好;当前处理上浆配方中海藻酸钠用量为0.5%～1%,硫酸钠用量为7%,碳酸氢钠用量为1%,尿素用量为4%时,丝绸织物的喷墨印花色彩得色量达到最好,印花织物表观得色量K/S值可达74.81,各项色牢度均可达到4级以上。     

天丝织物的活性染料数码喷墨印花

通过对天丝织物活性染料数码喷墨印花工艺的研究,探讨了天丝织物的最佳上浆预处理和印花工艺,测定了印花后天丝织物的得色量和色牢度。结果表明,天丝织物活性染料数码喷墨印花预处理的最佳工艺为:海藻酸钠2.5%,碳酸氢钠2%,尿素10%,硫酸钠3%,102℃汽蒸15 min。印花后的天丝织物各项色牢度可以达到4级以上。     

蒸化机热平衡测算

主持人：欢迎进入《百花苑》。 蒸化的目的是使印花织物完成纤维和色浆的吸湿和升温,促使色浆中的染料向纤维中转移并固着。蒸化过程是较复杂的物理、化学反应过程,蒸化工艺条件的优化,对染料在纤维上的固着,印花色泽的鲜艳度及花型轮廓的清晰度,起着关键性的作用。     

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