湿巾行业可冲散性指蔗第3版于今秋出台

近1O年来,北美非织造布工业协会（INDA）和欧洲用即弃产品与非织造布协会（EDANA）以及两家协会的会员公司一直致力于为湿巾行业制订一套全面的可冲散性指南。定义可冲散性并告知消费者什么产品可安全冲散,这是湿巾行业成功的关键。在北卡罗来纳州和缅因州,湿巾行业已受到一些公众的责难,他们不公正地指责可冲散湿巾堵塞下水道。     

国外评价非织造布湿巾可冲散性的七步试验法

为了让消费者在使用前就能知晓和掌握湿巾产品的可冲散性,放心使用该产品,欧美国家已制定非织造布湿巾等消费品的可冲散性评价标准及七步试验法。阐述国外对非织造布湿巾等产品可冲散性的评价路线、七步试验法及验收标准。     

兰精公司推出可冲散性TENCEL~(天丝~(TM))纤维

兰精公司出品的纤维素纤维TENCEL(天丝TM)短切型纤维,可全面迎合非织造业的最新潮流。这种可生物降解的纤维质构强韧但却具有可冲散性,最适合制造优质湿巾和个人护理湿巾。目前湿巾市场正按每年6.5%的幅度扩张,愈来愈多家庭使用湿巾作日常家居卫生及个人护理用途,而且趋势日渐流行。这些湿巾不管是否可冲散,许多时候也会被丢进抽水马桶,结果导致公共污水处理     

湿强度与产品的可冲散性

目前。“可冲散性湿巾”是非织造布行业的一个热点：要求湿巾能够在污水系统中冲散,不能对管道或污水处理设施以及操作产生不利影响。由于可冲散湿巾的使用便利性,消费者对其需求正不断增加,对生产商的生产需求也因此提高。过去．可冲散性湿巾的市场覆盖率一直无法扩大,仅因为一个难以解决的矛盾：在生产和使用过程中。湿巾必须具有足够的强度保持其完整性。     

Lenzing:可冲散性Tencel纤维

<正>奥地利兰精集团(Lenzing)出品的纤维素纤维——Tencel短切型纤维(图1),可全面迎合非织造行业的最新潮流。这种纤维具有可生物降解性,且强度很高,同时还具有"可冲散性",非常适用于制造高品质湿巾和个人护理湿巾产品。人们经常不会顾及湿巾产品是否"可冲散",在用后便将它们丢进抽水马桶中,导致公共排污处理系统堵塞。业界很关注这一现象,市场也亟需新的生产技术解决     

可冲散性湿巾及其非织造布的技术发展现状

可冲散性湿巾是人们生活中常用的一类物品,其在日用品市场中占据的份额越来越大。由于人们的环保、卫生以及健康意识逐渐增强,对可冲散性湿巾提出了更加严格的要求。因此,可冲散性湿巾的生产制作需要使用更加环保、卫生且对人体无害的材料。可冲散性湿巾具有丢入马桶也不会将马桶堵塞的优势,并且能在自然环境中自然降解。设计师要想更好地实现这些功能,首先,在设计可冲散性湿巾时,应缩小其尺寸;其次,需利用能生物降解的纤维进行生产,提高其强度,使其具备较强的分散性。文章介绍了目前可冲散性湿巾及其非织造布的技术发展情况,并提供相关建议,以供参考。     

特吕茨勒携手福伊特开发的可冲散纸巾获得权威质量认证

正2013年10月底,Voith Pape(福伊特造纸)与Trützschler Nonwovens(特吕茨勒非织造)实现了一项重要的里程碑:其合作研发的非织造材料生产工艺成功通过美洲非织造布协会(INDA)和欧洲非织造布协会(EDANA)的官方测试,并获得"可冲散"认证。可冲散纸巾是可以冲入厕所的湿巾,如婴儿清洁巾或清洁纸。对于生产商来说,至今为止"可冲散纸巾"一直是节约型的小型市场,并且对产品的要求很高:一方面,非织造布必须有足够的强度用于     

基于水可冲散性且生物可降解的湿态非织造布的成型与机理研究

水可冲散性湿态非织造布不仅能够保证消费者的正常使用,而且能够在水流的作用下被冲散,不堵塞抽水马桶。既减轻了环境的负担,又为消费者提供便利。本文从水可冲散性湿态非织造布的概念出发,介绍该产品在国内外现有的研究状况。     

VOITH和Trützschler使环保非织造布的高效生产成为可能

正可再生纤维素原料具有很高的成本效益,可生产具有不同特点的高品质非织造布,其中一种特别的产品就是可冲散湿巾。作为世界上最大的化妆品湿巾生产商之一,位于以色列迪莫纳的Albaad公司只使用纤维素纤维生产湿法产品。其新生产线WLM1由非织造领域两位知名的技术引领者——Trützschler(特吕茨勒)与VOITH(福伊     

VOITH和Trützschler使环保非织造布的高效生产成为可能

正可再生纤维素原料具有很高的成本效益,可生产具有不同特点的高品质非织造布,其中一种特别的产品就是可冲散湿巾。作为世界上最大的化妆品湿巾生产商之一,位于以色列迪莫纳的Albaad公司只使用纤维素纤维生产湿法产品。其新生产线WLM1由非织造领域两位知名的技术引领者——Trützschler(特吕茨勒)与     

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.     

Chlorohydrins of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) in canned foods and ready-to-drink coffees from the Japanese market

BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H₂O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.     

European priorities for research to support legislation in the area of food contact materials and articles

A strong science base is required to underpin the planning and decision-making process involved in determining future European community legislation on materials and articles in contact with food. Significant progress has been made in the past 5 years in European funded work in this area, with many developments contributing to a much better understanding of the migration process, and better and simpler approaches to food control. In this paper this progress is reviewed against previously identified work-areas (identified in 1994) and conclusions are reached about future requirements for R&D to support legislation on food contact materials and articles over the next 5 or so years.     

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.     

Detection of adulteration of locust bean gum with guar gum by capillary electrophoresis and polarized light microscopy

Capillary electrophoresis (CE) and polarized light microscopy (PLM) were utilized in the detection of the adulteration of locust bean gum with guar gum. For CE analyses, standards of locust bean and guar gums were extracted with 30% CH₃CN, removing the residual proteins from the gum matrix. A 8.75 mM NaH₂PO₄-20.6 mM Na₂B₄O₇ buffer, pH 9, was used to separate these proteins and to identify marker proteins that were present in the guar gum. These markers did not co-migrate with components in the extracts of mechanically processed locust bean gum, and are used as indicators of adulteration. Using PLM with toluidine blue and iodine staining techniques, unadulterated locust bean gum samples were distinguished from mixed samples through the differential staining of components in locust bean versus guar and tara gums. These experiments in the use of CE and PLM provide orthogonal and complementary methods for the verification of 'true' positives and the elimination of 'false' positives.