无味载体DM-2308对涤纶低温染色性能研究

文中介绍了环保无味载体DM-2308的基本性能,并用于涤纶织物低温染色。探讨了不同温度、时间、p H值和载体用量对染色织物K/S值的影响,比较了低温载体法和高温高压法的染色效果,测试分析了K/S值、染色牢度,并将DM-230应用于生产实践中。结果表明,载体用量为3%,p H值为4.5~6.5,温度110℃、时间60 min,K/S值可以达到130℃高温高压常规染色工艺的91%以上,耐皂洗色牢度、耐摩擦色牢度与常规染色工艺基本一致;低温载体DM-2308染色法在涤毛织物大生产低温染色中K/S值大于26,可大幅提升分散染料低温染色的上染率,能够满足涤纶混纺织物低温染色的要求。     

涤纶耐碱分散染料一浴低温退浆和染色

采用耐碱性分散藏青HA对涤纶织物进行低温退浆和染色一浴加工,探讨了染色温度和时间,以及NaOH、十二烷基苯磺酸钠、苯甲醇和染料用量对涤纶织物失重率和染色性能的影响,测试了涤纶织物的失重率、强力损失率、K/S值、染色牢度和扫描电镜。结果表明,涤纶低温退浆染色一浴优化工艺为:分散藏青HA1%(omf),NaOH 1.5 g/L,苯甲醇50 m L/L,十二烷基苯磺酸钠1 g/L,100℃保温处理60 min。由扫描电镜观察可知,涤纶织物上的浆料去除良好,强力损失率7.9%,耐摩擦色牢度和耐洗色牢度均达到4～5级。     

碱减量对超细涤纶纤维织物性能的影响

为使超细涤纶纤维织物具有真丝织物的效果,需对其采用碱减量处理。主要研究了碱减量处理对超细涤纶纤维织物性能的影响,阐述了超细涤纶纤维织物碱减量实验的基本方法,以减量率、断裂强力、吸水性、硬挺度和染色表观色深K/S等指标表征超细涤纶纤维织物减量处理的性能。通过对碱减量处理后超细涤纶纤维织物服用性能的测试和比较,综合考虑织物碱减量处理的效果,确定了烧碱用量、碱促进剂种类和用量。通过正交分析法,优化超细涤纶纤维织物减量处理工艺处方和工艺条件,得出超细涤纶纤维织物碱减量的最佳工艺为:碱的浓度为5 g/L,促进剂浓度为0.8 g/L,时间为60 min,温度为85℃,浴比1∶30。     

涤纶织物的肉桂酸载体低温染色

以肉桂酸作为环保载体对涤纶织物染色,探讨载体用量、染色温度与时间等因素对染色织物性能的影响。采用正交试验,确定优化的染色工艺为:染料3%(omf),肉桂酸7 g/L,100℃保温染色45 min。结果表明,肉桂酸对涤纶纤维有增塑作用,可有效降低染色温度。肉桂酸载体染色织物的K/S值及各项色牢度与高温高压染色法及冬青油载体染色织物相近。     

分散荧光染料涤纶低温染色工艺

将苯甲醇用于涤纶分散荧光染料低温染色,研究了苯甲醇用量、分散剂用量、染料用量、染浴pH、染色温度、染色时间等对涤纶染色K/S值的影响,并测试了染色织物耐皂洗和耐摩擦色牢度。结果表明:苯甲醇可作为涤纶分散荧光染料低温染色助剂,可有效降低涤纶染色温度;涤纶低温染色的最佳染色工艺为pH=5、100℃保温60 min、分散荧光黄10GN的苯甲醇用量为15 mL/L、分散荧光红R-G的苯甲醇用量为45 mL/L,低温染色处理织物的耐皂洗和耐摩擦色牢度均可达到4~5级。     

除油剂FW

涤纶及棉织物在染色前需进行除油前处理,探讨了除油剂FW质量浓度、纯碱质量浓度、处理温度对除油剂除油效果的影响。试验表明:当除油剂FW 2g/L,纯碱1.5 g/L,100℃处理30 min油污织物,可以达到较好的除油效果;除油剂FW与染色同浴使用时,对织物的色差影响较小。     

涤纶织物低温染色工艺

用不同类型分散染料对涤纶织物低温染色,探讨膨胀剂DM-2302的用量、温度、时间、pH值对染色的影响.与高温高压染色工艺相比,具有相同的升华牢度及摩擦牢度,低温型染料的色差也比较小,上染百分率较高.对比实验结果表明,涤纶织物低温染色适宜选用低温型染料,得出的较佳工艺为:膨胀剂DM-2302质量浓度3.5 g/L,温度98℃,pH4.5,时间70 min.     

涤纶的HA型耐碱分散染料低温碱性染色

以苯甲醇为载体,采用耐碱性分散橙HA、红HA-3B和蓝HA对涤纶织物进行低温碱性染色,研究了苯甲醇、碳酸钠、分散剂和染料质量分数以及染色温度、时间等因素对涤纶织物染色性能的影响。结果表明:苯甲醇可作为分散橙HA、红HA-3B和蓝HA低温染色载体。优化的工艺为:耐碱分散橙HA或分散红HA-3B1.5%(omf),分散蓝HA 2.0%(omf),扩散剂NNO 2 g/L、碳酸钠10~20 g/L、苯甲醇40 g/L,染色温度100℃,保温时间60 min。涤纶织物可获得较高的K/S值和耐洗、耐摩擦色牢度。     

超临界二氧化碳中分散红3B对超细涤纶织物的染色研究

用超临界二氧化碳染色法对超细涤纶织物的染色状况分别从时间、温度、压力方面进行了考察研究.优化出超临界二氧化碳中分散红3B对超细涤纶织物的染色工艺:20MPa、110℃染30min,并比较了染色的K/S值.结果表明:超临界状态下染色远比高温高压染色的超细涤纶得色深,且色牢度优于高温高压染色.     

涤纶弹力针织物皂洗色牢度的提高

从染色、还原清洗两方面对涤纶弹力针织物染色后耐洗色牢度的提高进行了分析。结果表明:染色时加入1 g/L的分散除油精练剂DM-1364能明显提高涤纶弹力织物的防沾色性能;采用还原清洗剂DM-1557进行还原清洗,其较传统的纯碱保险粉还原清洗法有明显优势,还原清洗后的织物耐洗色牢度显著提高;DM-1557最佳还原清洗工艺条件为:DM-1557用量2.5 g/L,还原清洗温度80℃,还原清洗时间15 min,pH值3.0左右,浴比1∶10。     

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.     

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     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.