无缝针织圆机机构与编织工艺分析

以意大利圣东尼公司的单针筒SM8-TOP2无缝针织圆机为例．详细介绍了无缝针织圆机的结构和各部分功能,包括编织机件、三角装置、给纱装置等,并结合各机构的工作原理阐述了多种组织结构的编织过程和效果,如平针添纱组织、浮线添纱组织、浮线组织、集圈组织、提花添纱组织、毛圈组织、褶裥组织等,最后说明了纱线捻向、纱线张力、导纱嘴位置、哈夫针盘位置等生产过程中的技术要点。     

T400纤维无缝运动内衣产品开发与性能研究

为了研究T400纤维在无缝运动内衣上的性能,采用T400纤维、锦纶、锦包氨纱为原料在无缝机上进行编织,选用平针添纱、浮线、集圈3种组织编织试样.经过合理的后整理工艺,对织物拉伸性能、折皱弹性、悬垂性、吸湿性、透气性及散热等性能进行测试,分析T400纤维无缝面料与锦包氨纱传统面料的性能差异.结果 表明,T400纤维为面料...     

无缝内衣机驱检一体化调色控制技术

针对无缝内衣机在调色编织过程中由于执行驱动开环控制,时延不可控导致添纱、剪纱、换纱等动作不稳定的问题,深入分析内衣生产的调色工艺原理及驱动控制特性。以提高调色编织工艺控制稳定性为目的,提出一种无缝内衣机驱动与故障检测一体化的调色控制技术方案,根据驱动特性与回路电流特性,设计关键硬件电路与软件程序。测试结果表明,该方案稳定可靠、低功耗、工作效率高、能有效对故障信息进行判定,满足无缝内衣机调色控制要求。     

无缝内衣机调线过程中的垫纱工艺

无缝内衣机调线机构的垫纱工艺直接影响织针能否稳定钩住纱线,继而影响到编织物的质量。现有的无缝内衣机调线过程中出现纱线漏纱,甚至撞针等情况,其主要原因是调线手指变换时织针过早参与编织,不同调线手指变换交替进入安全垫纱区域所需要的时间缺少量化研究。为解决这一问题,根据调线机构与纱线的几何关系计算出8组调线手指的可靠垫纱高度范围,结合模拟实验中高速相机拍摄的8组调线手指变换时纵向运动轨迹,确定了各组调线手指变换后安全进入垫纱区域所需时间,为今后调线机构的改进提供了理论和实验依据。     

无缝内衣织物双向拉伸性能研究

在单面无缝内衣机上编织了平针添纱、假罗纹和交错组织等8种常用无缝内衣织物试样,采用双向电子强力仪对其进行了双向拉伸性能试验,并对试验数据进行分析和多项式拟合。结果表明在同一延伸率下,各种织物的纵向拉伸力大于横向,且随着延伸率的增大差异更显著;拉伸到同样长度时平针添纱组织的拉伸力最小,弹性回复性也较差;对假罗纹组织随着浮线的增多,拉伸力增大,弹性回复性也随之增大;而属于紧密型的1+1交错组织其拉伸力最大,但弹性回复性最差。     

采用不同圆机编织架空添纱面料的生产实践

采用不同圆机编织纬编架空添纱组织时成圈原理不同,面料差异很大,介绍采用普通圆机分别利用单成圈系统、双成圈系统、3成圈系统编织架空添纱织物的编织原理,以及详细的编织工艺设计案例和面料特点。同时分析采用架空添纱4色调线电脑大提花机编织架空添纱大提花织物的面料结构特点。并提出生产架空添纱结构面料过程中的常见问题及注意事项,指出设计人员在设计此类面料前需充分了解各类机器性能特点的重要性。     

单面电脑选花添纱提花机

由两根或者两根以上纱线分层次编织的单面组织称为单面添纱组织.在单面添纱组织中有意识地漏掉部分线圈中的地纱或者面纱即为添纱提花组织.介绍了单面电脑选花添纱地纱提花机和单面电脑选花添纱面纱提花机的工作原理和动作过程特点、设备改造时的注意事项以及使用该类设备所能编织的织物组织.在此基础上介绍了添纱提花机的适配输纱器的工作原理和结构特点.     

圣东尼SM8-TOP1型无缝内衣机多色提花的编织

介绍了圣东SM8-TOP1型无缝内衣机的结构和特点,分别阐述了该机型编织4色提花组织、8色提花组织以及5～7色提花组织的织造工艺,包括穿纱方式和编织原理.详细说明了4色提花组织的编织原理:提花线圈在1个循环的4个成圈系统中只编织一次,在不编织时,牵拉力使相邻线圈的纱线转移过来,从而形成拉长线圈,凸出于织物的表面,使色彩显现.8色提花以及5～7色提花组织的编织原理与之类似.     

集成柔性传感器无缝内衣原料与尺寸设计

研究集成柔性传感器无缝内衣的原料选择与最优尺寸设计,采用单因子控制变量以及正交试验法,选用不同地纱、面纱设计不同尺寸柔性传感器并测试其电阻大小。结果表明:以44 dtex裸氨为地纱,83 dtex涤纶色纱为扎口线,78 dtex锦纶色纱为面纱,78 dtex镀银导电纱线为添纱原料,设计柔性传感器尺寸为30个横列、40个纵行,使用适宜的编织参数,形成的无缝内衣具有优良的导电性和服用性能。     

不锈钢丝包芯纱针织物电磁屏蔽性能研究

采用涤纶长丝、棉粗纱和超细316L不锈钢丝在HN32-04型棉纺花式捻线机上纺制不锈钢丝包芯纱,并在龙星LXC-252SCV型电脑横机上编织纬平针织物及浮线添纱针织物。介绍纺纱原理及编织工艺,并测试不锈钢丝包芯纱的拉伸性能以及针织物的电磁屏蔽效能。结果表明,不锈钢丝包芯纱的平均拉伸断裂强力为38.96 N,位移为124.30 mm,其拉伸过程分为不锈钢丝断裂、纱线中纤维抽拔、纱线断裂过程。随着电磁波频率的不断增强,纬平针织物和浮线添纱针织物的电磁屏蔽效能下降。针织物结构不同,织物紧密程度和线圈大小不同,对不同频段电磁波的屏蔽能力也不同。     

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