涤纶织物喷墨印花免水洗预处理探讨

常规前处理涤纶织物的喷墨印花易发生不同程度的渗化,文中采用自制的预处理剂TG-1对涤纶织物进行喷墨印花免水洗预处理,探讨预处理剂TG-1对涤纶织物喷墨印花渗化、K/S值及耐摩擦色牢度的影响。结果表明,喷墨印花墨水在涤纶织物上的渗化主要因为织物的毛细管效应,通过控制毛细管效应可控制涤纶织物喷墨印花墨水的渗化;经过预处理剂TG-1预处理的涤纶织物,明显地控制了墨水的渗化,提高了织物的K/S值,且固色后不经水洗能达到耐摩擦色牢度的要求,达到了涤纶织物喷墨印花免水洗的目的。     

分散染料热升华数码印花墨水用涤纶织物的预处理

采用分散染料热升华型墨水直接对涤纶织物进行了喷墨印花,墨水在织物上容易渗化、得色深度低、日晒牢度差.比较采用不同质量分数的自制预处理剂(具有多官能团的非离子型活性高分子物质,简称A)对涤纶织物进行预处理,然后喷墨印花.结果表明:预处理剂w(A)=1%,经处理后的涤纶织物颜色鲜艳,K/S值有所提高;当用量为2%时,涤纶织物喷墨印花发生的渗化现象明显减弱;耐摩擦牢度和耐晒牢度均未发生明显变化,均能达到应用要求.     

等离子体对喷墨印花织物表面的影响

以空气、氩气为气氛的常压等离子体对涤纶织物进行表面改性,再用蓝色纳米颜料墨水进行喷墨印花.探讨了等离子体处理对涤纶表面形貌、化学组分、润湿性,以及印花性能的影响.研究发现,常压等离子处理涤纶织物后,可提高喷墨印花的清晰度和颜色鲜艳度,改善了渗化性能;XPS谱显示,涤纶表面的化学组分也发生了改变;扫描电镜分析显示,等离子体处理后纤维表面产生凹坑.     

释香型喷墨印花织物的β-环糊精衍生物预处理

采用β-环糊精衍生物对涤纶织物进行预处理,考察其在不同质量浓度下对涤纶织物喷墨印花K/S值、印制清晰度,以及对薰衣草香精缓释性能的影响.结果表明:经β-CD衍生物溶液处理后,涤纶织物喷墨印花的K/S值显著提高,且随其用量的增加而增加;大大提高喷墨印花的防渗化性能,进而增加印制图案的清晰度.当β-CD衍生物质量浓度为50-60g/L时,喷墨印花织物达到较高的K/S值和印制清晰度,并大大延长了香味的释放时间.     

涤纶喷墨印花织物的柠檬酸-β-环糊精预处理

采用β-环糊精和柠檬酸为原料合成柠檬酸-β-环糊精,将其用于涤纶织物颜料墨水喷墨印花预处理,改善喷墨印花的清晰度和颜色深度。FTIR谱图中1736cm-1附近酯键特征吸收峰表明合成产物柠檬酸-β-环糊精的形成。柠檬酸-β-环糊精处理后的涤纶织物喷墨印花清晰度由12.5%增加至70.0%,说明印花宽度更接近于设置宽度,渗化现象减弱。织物上印花色块的K/S值由3.6增至5.9,颜色深度增加。柠檬酸-β-环糊精处理后涤纶织物的润湿性和柔软度相比未处理织物略有下降。扫描电镜图进一步表明,涤纶纤维表面及纤维之间的空隙处覆盖着一层柠檬酸-β-环糊精薄膜,增加了纤维表面的粗糙度,降低了毛细管效应,提高了织物的防渗化性能。     

涤纶织物的双面数码印花工艺

为实现涤纶织物的一次成型双面数码印花，通过浸轧方式将自制的预处理剂整理到涤纶织物表面，研究了预处理剂用量对涤纶织物印花效果的影响。对处理后涤纶织物进行一次成型双面数码印花，进一步研究焙烘工艺对印花织物K/S值、色牢度和织物风格的影响。确定涤纶织物一次成型双面数码印花工艺为：预处理剂20 g/L，一浸一轧（带液率60%～70%）,120～130℃烘干，160～170℃焙烘90 s，双面数码印花织物可获得较高的K/S值，水洗后耐摩擦色牢度达到4～4.5级。     

空气/氩气等离子体预处理涤纶织物的喷墨印花

采用空气/氩气次辉光放电等离子体对涤纶织物表面进行改性预处理,再用浅品色纳米颜料墨水进行喷墨印花.探讨了等离子体处理对涤纶织物喷墨印花K/S值、防渗效果和纤维表面形貌等影响.结果表明,经混合气体等离子体处理后,涤纶织物的亲水性和防渗性显著提高,喷墨印花图案清晰、得色量提高,且不影响印花色牢度,并优于相同条件下空气等离子体处理效果;其最佳氩气混合比例为20%,最佳处理条件为:功率300 W、时间150 s、极板同距3mm.     

采用加热台板提高涂料喷墨印花的印制效果

由于涂料型墨水中颜料着色原理和发色特性的限制,涂料墨水印花图案的颜色深度和鲜艳度远低于染料型墨水.现通过采用加热台板的方法,提高打印织物的布面温度,喷墨印花清晰度大大提高,色深度和鲜艳度提升效果非常明显,其印花颜色深度和鲜艳度的提升率为传统柔软剂预处理法的2～3倍;而且经适当的粘合剂处理,耐摩擦湿沾色牢度有所提高,达到3级,摩擦干沾色和耐刷洗色牢度可达4～5级.     

直喷式超细涤纶纤维织物的数码印花工艺

针对直喷式超细涤纶纤维仿麂皮织物的数码印花工艺进行了研究,探讨了上浆处理配方对直喷式织物数码印花得色量的影响以及后续的蒸化水洗工艺参数对青、品红、黄、黑4种颜色印花的得色量,测试了该预处理条件下产品的色牢度,以评价其印花效果。结果表明:印花工艺中汽蒸温度为130℃条件下,时间为30 min时得色量较好;预处理上浆处方中,瓜尔胶质量分数为3%,尿素质量分数为8%,磷酸二氢钠质量分数为2%和渗透剂为1%时织物的喷墨印花色彩得色量达到最好,印花织物K/S值可达49.2,各项色牢度均可达到4级以上。     

PEG20000提高涤纶机织物喷墨印花质量的研究

采用聚乙二醇(PEG)20000对涤纶织物进行处理,然后喷墨印花,探讨不同的处理条件对提高涤纶喷墨印花质量的影响。通过试验发现,使用PEG20000确实可以改善喷墨印花的效果,使印制的织物图案较清晰,颜色较鲜艳。研究表明,较好的处理条件是室温处理30min,PEG20000用量3%。     

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