真丝与棉混纺织物染色的同色性研究

用活性染料染真丝／棉混纺织物，通常存在真丝上染率低、色浅、混纺织物同色性差的缺点。通过对染色各工艺条件，如pH值、盐、碱量和温度等的研究，寻求可以提高此混纺织物染色同色性的途径，即真丝／棉混纺织物在酸性条件下用活性染料染色，碱性条件下固色。随染液pH值的降低、元明粉用量增加、纯碱用量减少和保温温度的提高，纤维间的同色性趋好。     

真丝／棉交织物活性染料染色的同色性研究

用诺威克隆LS系列活性染料染真丝,棉交织物,通过对染色工艺条件(pH值、盐、碱量等)的研究,寻求可以提高织物染色同色性的途径.结果表明:真丝/棉交织物可用活性染料在酸性条件下染色,在碱性条件下固色.随着染色起始pH值的降低,真丝与棉间的同色性提高,以pH值5为宜.Na2SO4对活性染料上染真丝的促染作用大于对棉的促染作用,随着Na2SO4用量的增大,纤维间的同色性提高,最终定为30 g/L.Na2CO3用量增加不利于染料对真丝纤维的固着,为了达到真丝/棉混纺织物用活性染料染色的同色性,选定为8 g/L.在此工艺下,可获得良好的同色性和染色牢度.     

缓染剂在棉/真丝织物同色染色中的应用

在棉/真丝混纺织物Drimarene活性染料一浴一步法染色中,为提高棉和真丝的同色性,在染浴中加入适量的缓染剂,探讨了缓染剂种类及用量对染色同色性,上染速率和固色率的影响。结果表明,阴离子型缓染剂Lyogen AB可减缓活性染料对真丝纤维的上染速率,改善棉/真丝织物活性染料同浴染色的同色性,且不影响染料利用率。     

甲壳素/棉混纺织物的染整加工

为提高甲壳素／棉混纺织物的染色同色性，采用阳离子醚化剂3-氯-2-羟丙基氯化铵进行改性预处理，研究了预处理工艺条件（醚化剂、NaOH用量，处理时间及温度）对织物活性染料染色性能的影响。确定了最佳的阳离子改性工艺条件：阳离子化试剂50g／L，氢氧化钠15g／L，处理时间40min，处理温度60℃。结果表明，在该工艺条件下，甲壳素／棉混纺织物可实现活性染料一浴法染色，同色性得到提高，对抗菌性和皂洗牢度影响小。     

莱赛尔/棉混纺织物的染色同色性北大核心

由于莱赛尔纤维和棉纤维在结构和性能上的差异,其混纺织物在同浴染色时存在竞染。为实现染色同色性,使用专用活性染料和常规活性染料对纯棉机织物和莱赛尔机织物进行染色,分析了硫酸钠用量、碳酸钠用量、保温时间、染色工艺、丝光条件以及染料类别对同色性效果的影响。结果表明:硫酸钠用量、保温时间对同色性影响较小,碳酸钠用量、染色工艺及丝光条件可提高莱赛尔/棉混纺织物的同色效果。在加碱固色前增加一道90℃保温10 min工艺,有利于提高混纺织物的同色效果。当丝光碱液的质量浓度在180 g/L以上时,6只染料染色织物的同色效果较好。DCS系列活性染料可有效提高同色性效果。     

甲壳素/棉混纺织物一浴法染色研究

用活性染料染甲壳素／棉混纺织物存在棉上染率低、色浅、混纺织物同色性差的缺点．采用阳离子醚化剂预处理混纺织物对染色织物表观色深K／S值、色度指标L^＊、α^＊、b^＊及耐水洗色牢度的比较，得到了最佳预处理工艺条件：阳离子化试剂50g／L，氢氧化钠15g／L，60℃处理40min，研究结果表明：甲壳素／棉混纺织物经阳离子化预处理后，采用活性染料染色，均得到了较好的染色深度和匀染性，并且混纺织物的抗菌性增加．     

新型染料在棉毛混纺织物染色中的应用

采用住友公司的Sumfix HF染料对棉毛混纺织物进行一浴一步法染色,研究了温度、pH值、盐用量及碱用量对染色效果的影响,确定了染色的工艺条件:盐用量40 g/L,碱用量15g/L,初染pH值为8,温度60℃,时间90 min.结果表明,在此工艺条件下,棉毛混纺织物的棉和毛的上染速率一致,而且棉和毛的同色性、匀染性和染色牢度也很好.     

绢棉丝光织物的染色同色性

针对绢棉丝光织物活性染料染色时同色性较差的缺点,探讨了丝光碱浓度,染色时加碱方式,染液的pH值,盐、碱的加入量和固色温度对染色同色性的影响。试验结果表明,绢棉混纺织物丝光时的碱质量浓度宜选择270 g/L,在活性染料染色时染液pH值控制在7,盐用量为15g/L,纯碱用量为7g/L,固色温度70℃,并在升温至染色温度后20 min加碱,真丝和棉纤维间的染色同色性较好。     

棉天丝交织物Everzol ED染料染色

针对棉和天丝纱线染色性能的差异,试验了染料用量、染色温度、盐和碱用量以及固色时间等工艺因素对棉天丝交织物Everzol ED活性染料染色同色性的影响。通过正交试验,优化了染深色工艺。在染料用量3%～8%,染色温度80℃,盐用量100g/L,碱用量20g/L,固色时间75 min的工艺条件下对棉天丝交织物染深色,能得到良好的同色性及较高的色牢度。     

用Cibacron FN染料染大豆/竹纤维混纺织物的工艺探讨

介绍了CibacronFN染料的结构及染色性能，重点探讨了CibacronFN染料染大豆纤维／竹纤维混纺织物的条件，即染色温度为70℃，保温时间为60min，染浅色时Na2SO4的用量为8～15g／L，染中色时为15～15g／L，染浅色时Na2SO3的用量为5～10g／L，染中色时为13～15g／L。确定了CibacronFN2R黄、CibacronFNR红、CibacronFNR蓝做三元色，对染色中存在的问题进行了分析，找出了原因，给出了解决办法。     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

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 Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

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 latest scientific     

Contamination of animal feed and food from animal origin with mineral oil hydrocarbons

Oils and fats used for the production of animal feed can become contaminated with mineral oil material originating from gas oils (C₁₈-C₃₅) or synthetic oils (poly alpha olefins, C₂₅ to beyond C₄₅). An important cause is assumed to be the discharge of waste oils, such as motor oil and hydraulic oils. Mineral oil material was analysed by on-line LC-GC-FID directly in the fat or in a raw extract from animal feed or foodstuffs. In Switzerland in summer/autumn 1999 concentrations in oils and fats for feed production were often found to be between 100 and 1000mg/kg. In the feeds, the average concentration was around 100mg/kg with values ranging up to a maximum of 1000mg/kg; few samples were free of contamination. In animal body fat, the average concentration determined in summer 1999 was 25mg/kg, with a maximum of 150mg/kg, although in samples from December 1999, contamination was substantially lower. In the fat phase of eggs, the average concentration was 30mg/kg, with a maximum of 80mg/kg. Paraffin oil is used for feed production, which may account for part of the contamination problem (e.g. eggs).