漂白浆挂面箱纸板利用废纸纤维生产的研发

介绍了对漂白浆挂面箱纸板的认识和用废纸纤维研制生产的工艺技术措施,包括生产工艺流程、原料配比、生产工艺技术条件和废纸制浆工艺中采取的关键技术措施。例如改善废纸纤维原料分类;陡用精密缝筛、热分散等提高分离非纤维组分,特别是蜡、胶黏物的效率;使用精密分级筛,分离长短纤维用于纸板的底层和芯层,提高产品的性价比。最后介绍了研制生产的产品达到的主要技术性能指标。     

胶粘物控制酶Optimyze——使胶粘物不再成为您的烦恼

随着二次纤维用量的增多,废纸质量的下降,废纸浆中胶粘物处理问题变得越来越重要。为解决废纸浆料中胶粘物给造纸带采的不良影响,扩大废纸,尤其是低质量废纸的利用前景,多年来,巴克曼直致力于胶粘物垃制产品的研发。 巴克曼实验室最新研究、开发出了独特的、用于胶粘物控SUBS专利酯类酶制剂——0ptimyze。系列产品。该产品不仅能促进胶粘物与纤维的分离,     

大豆蛋白纤维及其产品开发

介绍了大豆蛋白纤维的纤维及其研制生产概况,简述了纺纱工艺流程选择,各工序工艺技术措施,或纱质量和产品开发情况。     

浅谈木浆二次纤维打浆特性

近年来废纸回收利用率迅速增长 ,发展处理废纸和充分利用技术、不断提高回收利用废纸水平 ,对合理使用二次纤维资源、缓解造纸原料供应不足及减轻环境污染、降低能源消耗、降低纸张成本、减少森林采伐 ,保护生态平衡均是有力措施。由于我国森林资源贫乏 ,加上长期伐木与培育林木脱节 ,导致纤维原料严重短缺。如何更好地挖掘、利用废纸资源 (进口废纸基本上是木浆 ) ,便引起我们造纸行业的关注。本文浅谈木浆二次纤维的浆料特性 ,供造纸同仁参考。1　废纸回收与其构成回收废纸的主要步骤有 :收集、分类、净化、加工等。我国还没有一套整体性…     

废纸浆料中纤维细小组分和无机物组分的分离技术

当今．废纸已成为纸张生产中纤维原料的最重要来源。与化学浆和机械浆相比,废纸具有诸多优点．如浆料制备的能耗更低,原料成本更加低廉。但是废纸本身也存在许多缺点,如杂质（非纤维类物质）含量较高等。其中,填料和颜料的存在已经成为影响废纸利用的主要因素。由于填料在纸张生产中的应用比例不断增加以及白水循环程度不断提高。废纸中无机物组分的含量也逐渐增加。废纸中无机物组分的增加导致在使用无机物组分含量高的废纸生产高档纸张时．经常会带来诸多的问题。例如,在使用废纸作为原料时．     

ZDFF复式纤维分离机

ZDFF复式纤维分离机是山东省莱州造纸机械厂为造纸行业利用废纸制浆提供的一种新型节能设备。现将其性能特点和使用情况介绍如下。一、结构特点 ZDFF复式纤维分离机如图1所示。     

废纸制浆流程及设备选型

愈来愈多的造纸厂采用废纸制浆生产纸和纸板,以减轻环境污染、节约能源和缓解纤维原料的紧张局面,这对发展我国的造纸工业具有重要意义。由于生产的纸和纸板的品种不同,因而对废纸制浆的工艺要求也各有差异。但概而言之,废纸制浆的工艺过程不外乎包括下列几个阶段:废纸的碎解,轻重杂质的分离,纤维的洗涤与筛选,纤维的疏解(或者适度打浆)等。本文所探讨的,便是这些过程的合理结构与选择,对于废纸浆料的脱墨与漂白处理,不予研讨。一、废纸制浆的合理流程根据我厂废纸制浆流程所存在的一些问题,结合有关厂家的生产经验,较为合理的废纸制浆生产线,应当具有下列几个条件:(1)具有较为充分的碎解过程。(2)     

回收废纸及其在箱纸板生产中的应用

回收利用废纸与采用原生资源相比，可节约用水和能源约50％，如果利用木材原料，需4～5m^3原木生产1t纸浆，而1．25t废纸就可生产1t再生废纸浆，而且建设纸浆综合工厂比建设利用废纸造纸厂投资高1～2倍，甚至更高。大量增加各种纸和纸板中二次纤维的配比，使用回收纤维与原料搭配抄纸将是造纸工业生产发展最明显的趋势之一。     

用新的湿润剂加强废纸纤维的解离和磨浆

俄罗斯科技人员研究了废纸纤维解离和磨浆过程中的物理和化学现象，发现在该过程中，水与废纸纤维发生水合作用；还发现采用新的湿润剂SL-98（离子和非离子型表面活性剂、配位剂和缓冲剂的混合液）可以强化废纸纤维解离和回收纤维在磨浆过程中的水合作用：结果表明，在加工废纸过程中，使用SL-98湿润剂可以改善废纸纤维解离和回收纤维的磨浆，从而节省能耗，并使得到的纸浆保水值较高，纸产品耐破度较高。     

二次纤维性能与回用次数的关系

借助显微镜分析了国产书刊废纸、进口书刊废纸和混合办公废纸的纤维形态及组成，重点阐述了回用过程中三种废纸纤维的强度和光学性能变化情况。     

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.