高速卫生纸机靴式压榨系统简介

本文从靴式压榨的概念、NipcoFlex T靴式压榨的结构、工作流程和生产实践等方面介绍了高速卫生纸机靴式压榨系统。     

用于文化纸机最有效的压榨技术——靴式压榨

适用于文化纸机的第一种靴式压榨概念提出于1994年，最早是应用于新闻纸机。当时在干燥部前连续压榨后通过靴式压榨可以很好的提高纸张的干度。靴式压榨具有以下众多优点：可以很好的替代现有的独立压榨；出压榨后纸张干度高；适用于高速纸机；节省蒸汽用量、投资回收期短等。尽管第一种靴式压榨概念也存在一些缺点，     

介绍一种全新的双压区压榨--Nipcoflex

本介绍了最新式的靴式压榨－双压区靴式压榨,与四辊三压区靴式压榨相比,由于采用了全闭无张力引纸浆压部断纸的可能性几乎降为零,出压榨干度提高,由于采用了双压区,靴辊上下放置,纸页两面差更小。     

Heimbach公司新增靴式压榨带系列产品

日前Heimbach公司宣布与Yamauchi公司达成独家经销协议,向欧洲纸厂提供Yamabelt靴式压榨带（靴式压榨包覆层）。随着现代化纸机越来越多地采用靴式压榨技术,Heimbach公司将在纸机织物系列产品和Webmover传送带中新增靴式压榨带供消费者选择。     

高速纸机上靴套的安装与使用

靴套是靴式压榨的易损件。正确安装和使用对提高纸机效率、降低生产成本十分重要。齐齐哈尔造纸有限公司引进的芬兰Metso集团OptiConcept纸机上配有靴式压榨。本文介绍了靴套的安装和使用经验，提出了常见问题的产生原因和解决办法。     

功能强大的靴式压榨技术

靴式压榨可用来生产各种纸和纸板.对不同的纸,靴式压榨赋予纸张的特性是不同的,对某些纸张,靴式压榨可同时提高其各种重要的性质,这是其他压榨技术不可比的.     

纸机压榨技术的新进展

近年纸机压榨部最基本的变化可能是靴式压榨（ｓｈｏｅｐｒｅｓｓ）的引入。虽然靴式压榨技术已在某些造纸产品，如箱纸板和瓦楞原纸的应用中确立，但近年在文化用纸领域的应用特别引人注目。据德国造纸设备供应商ＶｏｉｔｈＳｕｌｚｅｒ公司报道，全世界到１９９８年８月已有３５套靴式压榨应用于文化用纸，到１９９９年８月还可能成倍地增长。１９９８年ＶｏｉｔｈＳｕｌｚｅｒ公司又推出一种新型压榨———ＴａｎｄｅｒｎＮｉｐｃｏＦｌｅｘ，其中ＮｉｐｃｏＦｌｅｘ是靴式压榨原设计的名称。这套新型压榨已由德国的２家造纸公司订购，估…     

一种造纸机靴式压辊

正申请公布号:CN 112127196 A发明人:章闰平黄冬冬陈建申请人:章闰平靴式压榨改进了以往线压力压区小、脱水效率低的缺陷,采用靴式的宽区压榨,脱水效率明显提高。但现有的造纸机靴式压辊存在一定的缺陷:(1)靴式压榨虽然有更好的脱水效果,但靴压辊中下凹的靴压区使得湿纸在进入和离开压区时受到较大的张力,     

靴式压榨对高级纸特性的影响

为调整靴式压榨对湿纸页固形物含量和高级纸特性影响,在中试纸机上进行了一系列试验,纸机运行速度为600m/min和700m/min,靴式压榨压区负荷为50～700kN/m。高级纸在通过轻负荷的两辊压榨和一个靴式压榨后,可获得较好的松厚度和45％的固形物含量。当纸页通过四道重负荷压榨,其中一个是靴式压榨时,其固形物含量超过了47％,但与通过轻压的三辊压榨机相比,松厚度低10％。压榨到相同的固含量时,与只采用辊式压榨相比,纸页经过靴式压榨具有更高松厚度和不透明度,但较低的Scott结合力和强度。在安装新纸机和对现有高级纸机进行改造时,应考虑使用靴式压榨,因为这种压榨机能将纸页压榨到高固形物含量而产品的松厚度下降较少。     

新纸机压榨部采用靴型压榨--LWC改造项目国际新技术消化吸收

本文叙述了几家外商推荐的靴型压榨结构和多种设计方案，比较了它和辊式压榨在脱水性能和对产品质量所产生影响的区别，以及比较了四辊或五辊三压区的第三压区采用靴型压榨的方案和直通式二道或一道靴型压榨方案。采用什么方案，要从品种、车速、机台整体水平、对产品质量的要求，做一全面衡量来选择。     

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.     

The Ministry of Environmental Protection Issued "Feasible Technology Guidelines for Pollution Prevention and Control in Wood Pulping Process of the Paper Industry (Trial)" and Two Other Guiding Technical Documents

On December 27t＂, 2013, the Ministry of Environmenta Protection announced that, in order to implement ＂The Environmental Protection Law of the People＇ s Republic of China＂, improve the working system in environmenta protection technologies, and promote technologica advancement in pollution prevention, the Ministry of Environmental Protection sponsored the formulation of three guiding technical documents including ＂Feasible Technology Guidelines for Pollution Prevention and Contro n Wood Pulping Process of the Paper Industry （Trial）＂     

1~(st) Intelli-Tissue~ EcoEc Tissue Machine Supplied by PMP Group Successfully Put into Operation in China

正On April 29th,2014,Intelli-Tissue EcoEc tissue machine supplied by PMP Group successfully put into operation at Hebei Xuesong Paper Co.,Ltd.,this is the first such kind of paper machine of PMP Group in China.