床垫材料及经编间隔织物的应用探讨

介绍了床垫的构成以及高品质床垫材料的要求,在此基础上探讨了经编间隔织物作为床垫材料的优势以及应用实例。作为一种新型环保型材料,经编间隔织物在床垫材料方面有着广阔的应用前景。     

经编间隔织物的应用及其发展

介绍经编间隔织物的特性,指出经编间隔织物在座椅包覆、鞋材、箱包和床垫等方面的常规应用及其优势,并根据当前经编间隔织物结构和原材料的发展,详述经编间隔织物在时装面料、成型鞋材、卫浴产品、建筑增强材料、农业无土栽培和包装材料等方面的新应用,得出经编间隔织物的三个未来发展方向——个性产品、功能产品和智能产品。     

经编间隔床垫织物生产工艺

简述了经编间隔织物的生产原理和床垫织物特点,结合实例介绍了经编床垫织物的编织工艺组织、所用材料、设备选择及改造、整经和编织工艺措施,以及织物性能和优点。     

平板压力下床垫经编间隔织物压陷性能与仿真

为了获得具有良好支撑性能和压力分布的床垫用经编间隔织物,对不同细度间隔丝的经编间隔织物进行压缩测试,并得到相应的应力-应变曲线,对织物压陷硬度、支撑因子等压陷性能参数进行分析,同时借助有限元进行仿真模拟得到压缩曲线和织物受力微观状态,并利用SPSS软件对其应力与间隔丝细度进行分析。结果显示：经编间隔织物的压缩可分为线性压缩、屈服和压溃3个阶段,其中屈服阶段是研究床垫用间隔织物压缩性能的重要阶段;经编间隔织物在压缩过程中,应力不仅随间隔丝细度和压陷深度的增加而增加,且应力与间隔丝细度呈高度相关,并随应变的增加相关性愈显著。     

床垫用经编间隔织物的开发

基于经编间隔织物良好的抗压弹性和热、湿调节功能等,从间隔纱种类、密度、垫纱角度、间隔距离、表层织物结构等方面着手,开发了一种厚度为40mm的床垫用经编间隔织物。并与同等厚度的海绵（聚氨酯泡沫）进行压缩性能和回弹性能测试对比,结果表明,经编间隔织物的抗压回弹性优于海绵,是制作床垫的理想材料。     

床垫用经编间隔织物的压缩性能

从床垫结构出发,提出了符合人体工学原理的高品质床垫材料在承受人体重量情况下的要求,通过对经编间隔织物在两种形状压头压力下的变形分析,指出间隔丝的弯曲是决定间隔织物受压变形的主要因素。     

衬垫用经编间隔织物的压陷性能

为获得具有良好支撑性和压力分布的衬垫用经编间隔织物,对不同规格的经编间隔织物的压陷性能进行研究。在双针床拉舍尔经编机上,通过改变织物纵密、间隔丝垫纱角度、间隔丝直径以及脱圈板距离,试织了13种经编间隔织物试样。测试了试样的压缩应力与应变曲线,并以25%和65%压陷硬度和支撑因子作为评价织物压陷性能的指标。探讨间隔丝密度、垫纱角度和直径以及织物厚度对经编间隔织物压陷性能的影响。研究结果指出：织物屈服阶段是研究织物压缩性能的重要阶段;通过各种结构参数的合理配置,可以获取具有理想压缩特性的经编间隔织物衬垫材料。     

衬垫用经编间隔织物振动特性探讨

为更好地了解用于汽车座椅衬垫材料的经编间隔织物的力学特性,针对间隔织物的三维结构特征分析其在静态和动态压力下的黏弹性。建立动力学模型后,采用振动传递率来表征间隔织物振动特性,提出固有频率和黏滞系数2个振动参数,同时定性分析影响这2个重要振动参数的织物结构因素。结果表明,间隔层的结构和材料是影响经编间隔织物振动特性的主要因素,合理配置和设计经编间隔织物的结构参数,可以达到预设间隔织物的固有频率和黏滞系数的目的,以此对间隔织物振动特性进行优化获取乘坐舒适性。     

衬垫用经编间隔织物振动特性探讨

为更好地了解用于汽车座椅衬垫材料的经编间隔织物的力学特性,针对间隔织物的三维结构特征分析其在静态和动态压力下的黏弹性。建立动力学模型后,采用振动传递率来表征间隔织物振动特性,提出固有频率和黏滞系数2个振动参数,同时定性分析影响这2个重要振动参数的织物结构因素。结果表明,间隔层的结构和材料是影响经编间隔织物振动特性的主要因素,合理配置和设计经编间隔织物的结构参数,可以达到预设间隔织物的固有频率和黏滞系数的目的,以此对间隔织物振动特性进行优化获取乘坐舒适性     

经编提花三明治床垫面料的开发与应用

介绍经编提花三明治织物作为床垫面料的优点,详细论述经编提花三明治面料的机器设备和提花原理,并从原料选择、组织结构、花型设计、后整理以及裥花后加工等方面对经编提花三明治床垫面料的开发进行阐述。指出经编提花三明治织物作为床垫面料,具有吸湿散热、无汗无臭、设计灵活性强、适用性广等优点,拥有广阔的市场前景。     

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