络筒机筒纱吸嘴吸头成功率的研究

从纺纱品种、络筒工艺、机械结构、动作逻辑等方面对影响络筒机筒纱吸嘴吸头成功率的问题进行分析与探讨,提出了加大风机负压、增大支臂平衡气压、筒纱吸嘴点动吸纱、减少启动切纱并优化启动切纱吸头逻辑、优化钢梳齿形、磨砂处理钢梳背面和优化槽筒正反转程序等提高一次吸头成功率的有效措施,以提高棉纺厂的生产效率、提高筒纱质量、大幅降低挡车工的劳动强度。     

Espero-M型络筒机打结送纱吸嘴的革新

Espero-M型自动络筒机的打结送纱吸嘴担负着两项作用:一是在打结前将纱送至打结器内,二是将打结后多余的纱吸走.     

Autoconer338型络筒机乱纱故障的解决措施

在使用Autoconer338型络筒机纺R 9.7 tex品种时,筒纱内回丝带入和乱纱疵点过多,严重影响了下游工序生产过程中的生产效率和产品质量。经分析主要原因有以下几点。(1)当槽筒的逆转速度大于吸嘴的吸纱速度时,纱头难以被大吸嘴吸走,而槽筒的继续倒转就会形成乱纱层和乱纱团。此时大吸嘴侥幸接头成功,就会将其卷入筒子而形成严重的纱疵。当然槽筒转速也不可过小,否则会导致大吸嘴吸纱长     

№21C-S型络筒机生产中粗号纱工艺的优化

为了提高络纱速度并减少络纱毛羽,对№21C-S型络筒机的络纱工艺进行优化。№21C-S型络筒机在纺制中粗号纱线时容易出现捻接失误率偏高,毛羽增长幅度较大的问题,影响质量与产量的提高。通过对络纱速度、筒子接触压力、筒子卷绕硬度、单纱强力、风机负压的工艺优选,采取高速度、大强力、超硬度、低接触压力等工艺措施,保证了纺制中粗号纱时络纱速度达到1 450 r/min,减少了用工,节约了成本,并且提高了络筒质量及生产效率。     

改善№21C型络筒机筒纱成形的几项措施

我公司的№21C型络筒机自投产以来,筒纱成形一直是一个令人困扰的问题,且严重影响了并线工序的正常生产。通过观察,发现成形不良的筒子大多呈现菊花芯并伴随年轮、凸边形状。经过细致观察分析,造成筒纱成形不     

GA014型络筒机导纱钩的制作

在GA014型络筒机上反倒筒纱的过程中,纱线易将电子清纱器检测头的电缆线磨断,导致电清检测头出现故障.经过多次观察与试验,设计出一种反倒筒纱用导纱钩. 在制作过程中,结合设备状况,将5个锭子的导纱钩安装在1个导纱钩支架上.导纱钩支架可用扁铁制作.截取两段长5 cm的3 mm×30 mm扁铁垂直焊接在长130 cm的扁铁两端,并钻7个直径6.8 mm的孔,见图1.其中一端的孔做成长方形槽,便于安装.导纱钩可用报废的探纱杆或打包用的圆钢丝制作.     

AC6型自动络筒机用大吸嘴在AC338机型上的应用

为了提高AC338型自动络筒机的产量,介绍AC6型自动络筒机新一代大吸嘴的优点,分别将0.3 mm齿距、0.5 mm齿距和不带齿的AC6型自动络筒机大吸嘴应用在生产纯涤纶19.4 tex纱的AC338型自动络筒机的9个锭位,并与原装大吸嘴进行单锭时产量对比.指出:在AC338型自动络筒机上使用AC6型自动络筒机的大吸嘴,找纱头失败率降低,产量提高;对于纺纯涤纶19.4 tex纱,使用0.5 mm齿距大吸嘴单锭时产量提升0.8％,效果显著.     

提高无结纱质量的若干途径探讨

为提高无结纱的捻接强度,减少无结纱的表面毛羽,改善筒子的卷绕成形,对络筒技术及工艺作了进一步的分析与探讨,提出提高无结纱质量的有效途径。分析表明,合理选择捻接器类型及其合理的安装位置,采用毛羽减少装置、智能槽筒等络筒新技术,合理确定络纱速度、络纱张力等工艺参数,能够提高无结纱的最低强力,降低强力不匀率,减少纱线表面毛羽,保证筒子成形良好,适应筒子高速退绕,提高无结纱的可织性。     

对纱线质量的新认识(一)

针对目前纺织技术不断发展及检测技术的日新月异,客户对纱线质量的要求越来越高的现状,详细分析了影响纱线强力、棉结、毛羽、纱疵、条干因素、异纤等的危害和解决方法,指出原棉成熟度、工艺速度、纺纱器材和专件,尤其是牵伸和卷捻器材对成纱质量影响很大,应针对不同用途纱线的不同重点要求,优化工艺,优选器材,加强管理,减少质量问题.     

对纱线质量的新认识(二)

针对目前纺织技术的不断发展及检测技术的日新月异,客户对纱线的质量要求越来越高的现状,详细分析了影响纱线强力、棉结、毛羽、纱疵、条干的因素、异纤等的危害和解决方法,指出原棉成熟度、工艺速度、纺纱器材和专件,尤其是牵伸和卷捻器材对成纱质量影响很大,应针对不同用途纱线的不同重点要求,优化工艺,优选器材,加强管理,减少质量问题.     

自动络筒机吸纱风道的优化设计

为了提高自动络筒机的稳定性和工作效率,分析了当前络筒机风道存在的问题及其产生的原因,对络筒机吸纱风道进行了优化,设计出了带导流管道的变截面吸纱风道,通过数值方法进行计算,对比了优化前后吸纱风道内部流动情况,证明了优化设计方案的合理性.得出:优化后吸纱风道内的压力变化减小,抵抗外界干扰的能力增强,使得自动络筒机的稳定性和工作效率得到改善.     

贝利的可持续发展理念

贝利集团是芬兰一家服务于林产、造纸及相关行业全球领先的顾问公司,为全球制浆造纸工业提供有关咨询、项目开发、工程实施和运营管理方面的服务。凭借50余年的全球服务经验,贝利为制浆造纸行业的发展发挥了积极的作用。     

Dose-dependent utilisation of casein-linked lysinoalanine, N(epsilon)-fructoselysine and N(epsilon)-carboxymethyllysine in rats

During the heat treatment of protein-containing foods, the amino acid lysine is most prone to undergo chemical reactions in the course of amino acid cross-linking or Maillard reactions. Among the reaction products formed, lysinoalanine (LAL), N(epsilon)-fructoselysine (FL) and N(epsilon)-carboxymethyllysine (CML) are those which serve as sensitive markers for the heat treatment applied. From a nutritional perspective, these compounds are ingested with the diet in considerable amounts but information about their metabolic transit and putative in vivo effects is scarce. In the present study, casein-linked LAL, FL and CML were administered to rats in two different doses for 10 days. Quantitation of LAL, FL and CML in plasma, tissue and faeces samples revealed that the kidneys are the predominant sites of accumulation and excretion. The maximum percent of dietary LAL, FL and CML excreted in the urine was 5.6, 5.2 and 29%, whereas the respective recoveries in the kidneys were 0.02, 26 and 1.4%. The plasma and tissue analyses revealed that the endogenous load of either compound is increased by its dietary intake. But the dose-dependent utilisation of dietary protein-linked LAL, FL and CML in rats has been demonstrated for the first time to vary substantially from each other.     

Occurrence of aflatoxins M(1) and M(2) in milk commercialized in Ribeir?o Preto-SP, Brazil.

Aflatoxins are toxic metabolites found in foods and feeds. When ruminants eat foodstuffs containing aflatoxins B(1) and B(2), these toxins are metabolized and excreted as aflatoxin M(1) and M(2) in milk. The aim was to determine the incidence of these aflatoxins in commercial milk collected from supermarkets in Ribeir?o Preto-SP, Brazil, and consisting of 60 ultrahigh temperature (UHT) milk samples and 79 pasteurized milk samples. The milk samples were analysed according to method 986.16 of AOAC International. None of the milk samples analysed were contaminated with aflatoxin M(2), and aflatoxin M(1) was detected in 29 (20.9%) of samples in the range 50-240 ng l(-1). The results show that despite a high occurrence of aflatoxin M(1) in commercial pasteurized and UHT milk sold in Ribeir?o Preto in 1999 and 2000, the contamination level of these toxins could not be considered a serious public health problem according to MERCOSUR Technical Regulations. However, levels in 20.9% of the milk samples exceeded the concentration of 50 ng l(-1) permitted by the European Union. Although it is not necessary to continue monitoring the incidence and levels of aflatoxins M(1) and M(2) in milk samples, surveillance could be appropriate.     

21世纪服装消费趋势展望

本文就２１世纪服装消费趋势展开探讨。主要发展趋势有：季节模糊趋势、安全环保趋势、个性化趋势、简洁化趋势、形式降级趋势、国际同化趋势。认清服装发展及消费趋势,对服装生产、营销、消费都有重要意义。     

Evaluation of the fixed nitrogen-to-protein (N:P) conversion factor (6.25) versus ingredient specific N:P conversion factors in feedstuffs

BACKGROUND: The crude protein (CP) of feedstuffs is important as an indicator of essential and non‐essential amino acids for livestock. The protein (P) level needs to be known accurately, to minimize the feeding of excess nitrogen (N) and to reduce N pollution. Laboratory methods for determining N content report N from amino acids, but also N from ammonia and from non‐amino acid sources. The determined CP based on 6.25 × N level typically overestimates the true protein of feedstuffs. RESULTS: Determined ingredient‐specific N:P conversion factors k_A, k_P and k were not equal to the standard 6.25 factor. The k_A had the highest value in all ingredients, which leads to the estimation of specific crude protein (SCP), which is closer to true protein (the summation of the total amino acid residues from amino acid analyses). The SCP(k_A) was lower than CP and true protein in all ingredients, demonstrating that CP might overestimate the actual protein in feedstuffs. CONCLUSION: Based on data from 677 feedstuff samples from 2009, it is concluded that the mean k_A should be 5.68 for corn, 5.64 for soybean meal, 5.74 for corn DDGS, 5.45 for poultry by‐product meal and 5.37 for meat and bone meal. Copyright © 2011 Society of Chemical Industry     

纸病监测系统在卷烟纸机上的应用

介绍了纸页纸病监测系统(WIS)的技术特点及WIS在卷烟纸机上的应用情况。     

冰鲜大黄鱼不同副产物中滋味成分差异分析

为高效利用并提高大黄鱼加工的经济附加值,以冰鲜大黄鱼的7 种副产物为研究对象。首先确定基本营养成分的差异,其次利用电子舌确定副产物整体滋味差异轮廓,并分析游离氨基酸和呈味核苷酸的含量。结果显示碎肉、头肉、鱼卵及鱼鳞均具有高蛋白低脂肪的特点。电子舌在主成分分析基础上采用判别因子分析,可将7 种副产物的差异性进行有效区分。7 种副产物中除鱼鳞外,其他副产物中均检测出17 种游离氨基酸,且其他副产物的肌苷酸的味道强度值（taste activity value,TAV）均大于1且碎肉和头肉的TAV分别达到18.27和16.51。以上研究表明,大黄鱼不同副产物中滋味成分和含量存在一定差异,对大黄鱼整体风味有一定程度的贡献,这可为大黄鱼副产物的进一步开发利用提供有益的理论参考。