转杯纺纱接头装置的探讨

随着转杯纺纱速度的不断提高，手工接头已不能适应转杯纺纱的高速化发展。国外已经为高速的转杯纺纱机配置全自动接头机构或半自动接头装置。国产转杯纺纱机的转杯速度提高较快，但转杯纺纱接头技术远远落后国际水平，现有的国产转杯纺半自动接头装置均不能满足高支高速的要求。本文通过对转杯纺的手工接头、进口转杯纺纱机的半自动接头装置和全自动接头机构及国产转杯纺半自动接头装置接头过程的对比分析，探讨国产转杯纺纱接头装置的发展方向。     

Autocoro转杯纺纱的要求

在竞争激烈和对纱线质量要求越来越高的情况下，Shlafhorst公司正致力于转杯纺技术的进一步完善，使Autocoro转杯纺纱机具有良好的竞争优势，全面满足市场的要求。关于Autocoro转杯纺技术的开发，Shlafhorst公司作了进一步的说明。     

转杯纺纱的设备管理

转杯纺纱的设备管理朱长惠，姜余庆，邵启英（纺织工业新型纺纱技术开发中心）（上海市纺织科学研究院）（北京第三棉纺织厂）转杯纺纱机结构主要是轴承化和油浴油淋化，它不同于传统纺纱设备，主要部件纺纱杯和分梳辊转速高，维护保养要求高。转杯纺纱机有三多：轴承多；...     

转杯纺产品的开发

探讨开发中细号转杯针织纱的技术要点。介绍了棉类和非棉类转杯纱及其制品的类别、原料、纱号、混纺比及其性能特点。指出:转杯纺从生产粗号纱向中细号高档用纱方向发展是当今转杯纺技术进步的重要标志。纺好中细号转杯针织纱是一个系统工程,应在充分了解针织品对转杯纱的要求的基础上,从纤维原料、前纺工艺、半制品质量和转杯纺设备与工艺等多方面入手采取有效措施,以使转杯纺针织纱质量达到要求。     

转杯针织纱生产工艺

从纤堆原料、前纺工艺和转杯纺工艺三方面探讨了纺好转杯针织纱的工艺要求,提出了生产实践中应注意的问题,供纺制高质量的转杯针织纱参考。     

F1603型转杯纺纱机转杯定位方法

由于F1603型转杯纺纱机本身不带有转杯定位的专用工具,使得在对转杯定期保养和加油过程中,造成转杯取出后,难以准确定位.而其本身要求的隔距偏差在1 mm以内,隔距稍小,转杯就会与输棉通道摩擦而造成损伤.1套转杯和输出通道的价格在300元左右,1台转杯纺纱机共有192套,如果更换,则费用增大;如果隔距稍大,又会造成转杯和输棉通道之间出现跑花现象,细节增多,条干不匀,且其较隐蔽,不易发现,有严重的质量隐患.     

转杯纺质量控制体会

为提高转杯纱质量,对转杯纺质量控制的有关问题进行了分析和论述。指出：转杯纱的质量控制首先要严格掌握质量标准,要以满足客户要求为最终标准。转杯纱质量控制应贯穿于产品生产全过程。要合理使用纤维原料,前纺工艺加强除杂、除微尘,注意短绒含量,改善纤维分离度。应特别关注转杯、分梳辊、假捻盘、阻捻器等关键专件的选配并合理配置工艺。     

转杯纺纱机

转杯纺纱机本届展览会有四家厂商展出共四种机型转杯纺纱机。一德国斯拉夫霍斯特（Ｓｏｈｌａｆｈｏｒｓｔ）该公司展出最新型的Ａｕｔｏｃｏｒｏ２８８型转杯纺纱机２４锭短机。该机型与Ａｕｔｏｃｏｒｏ２４０机型相比，机械结构方面类同，无大的改进。全机最多可配２８...     

不同用途转杯纱纺纱要求浅析

为了拓宽转杯纱的应用范围,提高成纱质量,从生产实践中总结,分析了针织、机织及牛仔布用 转杯纱的纺纱要求。针织用纱配棉成分要求最高,且成分要稳定;转杯纺工艺流程应根据配棉成分,织物要求合理选择,随着纱线号数的减小,纺杯直径减小,转杯纱捻系数增大,清纱工艺参数从严,针织用纱要求最高,牛仔布用纱要求最低同时,还述及了高 、中、低档织物所用转杯纱各级纱疵的数值范围。     

绢丝转杯纺纱工艺研究

探讨用转杯纺工艺纺制绢丝的可纺性，对分梳辊、转杯规格进行试验选择，同时对分梳辊、转杯工艺参数进行优化设计。     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.     

低温带皮菜籽粕微粉的不同粒级部分的功能特性

为研究低温带皮菜籽粕微粉的不同粒级部分的功能特性,以经低温脱脂的带皮菜籽粕为原料,经微粉碎后筛分成212~425μm、150~212μm和106~150μm的3个不同粒级的微粉样品,检测这些样品的吸水性、吸油性、乳化性和乳化稳定性、蛋白质体外消化率。结果表明:1 3个不同粒级的微粉样品之间的粗纤维含量存在显著差异,表明三者的结构组成成分有一定差异。23个微粉样品的乳化活性和乳化稳定性随粒度级别的减小而显著增加(P0.01)。33个微粉样品的蛋白质体外消化率随粒度级别的减小而显著增加(P0.01)。4不同粒级带皮菜籽粕微粉样品的吸水性与吸油性受其结构组成物质不同和粒度的双重影响,与粒度的相关性不明显。     

Microbiology of food taints

Fresh and processed foods are often spoilt by the presence of undesirable flavours and odours caused by microbial action. The aim of this paper is to review the current knowledge of microbiologically induced taints that occur in a wide range of foodstuffs, including meats, poultry, fish, crustaceans, milk, dairy products, fruits, vegetables, cereals and cereal products. Examples have been chosen where the compounds responsible for the taint have been identified and sufficient data obtained to demonstrate the involvement of microorganisms. However, in some cases the full identity of the causative organism may not have been elucidated. The types of microorganisms covered by this review include bacteria, fungi, yeasts, actinomycetes and cyanobacteria. Although cyanobacteria do not in general infect foods, their presence in aqueous systems and water supplies can lead to off-flavours in aquatic organisms and processed foodstuffs. Several examples of each of these processes are discussed. Wherever possible, the likely biosynthetic pathway used by the microorganism to produce the offending compound in a foodstuff is indicated.     

Analysis for organic residues from aids to polymerization used to make plastics intended for food contact

Polymers intended for food contact use have been analysed for organic residues which could be attributed to a range of substances employed as polymerization aids (e.g. initiators and catalysts). A wide range of polymers was extracted with solvents and the extracts analysed by gas chromatography-mass spectrometry (GC-MS). The overwhelming majority of substances identified were not derived from aids to polymerization but were oligomers, additives and adventitious contaminants. However, a small number of substances were identified as initiator residues. These included tetramethylsuccinonitrile (TMSN) which was observed in two polymers and it derived from recombination of two azobisisobutyronitrile (AIBN) initiator radicals. Methyl benzoate, benzoic acid, biphenyl and phenyl benzoate were detected in one poly(methyl methacrylate) sample and in two polyvinylchlorides and they are thought to be derived from benzoyl peroxide initiator. TMSN was subsequently targeted for analysis of poly-(methyl methacrylate) plastics using proton nuclear magnetic resonance spectrometry (¹     

Tests of potential functional barriers for laminated multilayer food packages. Part II: Medium molecular weight permeants

Experiments were performed to characterize the kinetics of the permeation of different medium molecular weight model permeants: bisphenol A, warfarin and anthracene, from liquid paraffin, through a surrogate potential functional barrier (25 microns-thick orientated polypropylene--OPP) into the food simulants olive oil and 3% (w/v) acetic acid. The characterization of permeation kinetics generally observed the permeation models previously reported to explain the experimental permeation results obtained for a low molecular weight group of model permeants. In general, the model permeants exhibited behaviour consistent with their relative molecular weights with respect to (a) the time taken to attain steady-state permeation into the food simulant in which they were more soluble, (b) their subsequent steady-state permeation rates, and (c) their partition between liquid paraffin and the OPP membrane.     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. I: Interlaboratory studies of methods of analysis

This paper describes the first part of a project undertaken to develop mussel reference materials for Paralytic Shellfish Poisoning (PSP) toxins. Two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin (STX) and decarbamoyl-saxitoxin (dc-STX) in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the second part of the project: the certification exercise. In the first study, 18 laboratories were asked to measure STX and dc-STX in rehydrated lyophilized mussel material and to identify as many other PSP toxins as possible with a method of their choice. In the second interlaboratory study, 15 laboratories were additionally asked to determine quantitatively STX and dc-STX in rehydrated lyophilized mussel and in a saxitoxin-enriched mussel material. The first study revealed that three out of four postcolumn derivatization methods and one pre-column derivatization method sufficed in principle to determine STX and dc-STX. Most participants (13 of 18) obtained acceptable calibration curves and recoveries. Saxitoxin was hardly detected in the rehydrated lyophilized mussels and results obtained for dc-STX yielded a CV of 58% at a mass fraction of 1.86 mg/kg. Most participants (14 out of 18) identified gonyautoxin-5 (GTX-5) in a hydrolysed extract provided. The first study led to provisional criteria for linearity, recovery and separation. The second study revealed that 6 out of 15 laboratories were able to meet these criteria. Results obtained for dc-STX yielded a CV of 19% at a mass fraction of 3.49mg/kg. Results obtained for STX in the saxitoxin-enriched material yielded a CV of 19% at a mass fraction of 0.34mg/kg. Saxitoxin could not be detected in the PSP-positive material. Hydrolysis was useful to confirm the identity of GTX5 and provided indicative information about C1 and C2 toxins in the PSP-positive material. The methods used in the second interlaboratory study showed sufficiently consistent analysis results to undertake a certification exercise to assign certified values for STX and dc-STX in lyophilized mussel.     

Focus on China's Paper Industry

In the English section of this issue, 〈China Paper Newsletters〉 will introduce ＂National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the ＇13th Five-Year Plan＇＂, ＂2013 Annual Report of China＇s Paper Industry＂, and news of projects and other policies.     

Listen to downstream & search for innovation

正Nowadays,textile enterprises are all taking efforts in transformation and upgrading,like improving producing capacity and optimizing production structure to face market downturn.It claimed a higher request to the standard of textile equipments.In the upcoming of ITMA ASIA+CITME 2014exhibition,this magazine have interviewed several branch associations and a series of relative enterprises,to summarize industrial developing status