丙烯类浆料

丙烯类浆料，严格讲应是丙烯系单体的均聚物和以丙烯系单体为主的共聚物资料，但在常把除淀粉及淀粉衍生物、PVA和纤维素衍生物之外的合成浆料统称为丙烯类浆料，因而像新‘28’浆料，虽然它的组成中的醋酸之烯酯（乙烯系单体）为主，仍归属于丙烯类浆料；又加以马来酸（酯）为主的合成浆料也因组成中含有相当量的丙烯系单体，含糊地归属于丙烯类浆料中。     

绿色环保型纺织浆料

所谓绿色环保型纺织浆料,是指这种浆料在原料选用、浆料生产、上浆应用、以及纺织品使用过程中,都应对人体无害、对环境无污染、退浆排     

聚酯装置浆料配制罐排空管线堵塞原因分析

精对苯二甲酸(PTA)和乙二醇(EG)是生产聚酯的主要原料,EG/PTA浆料摩尔比为1.15.PTA称量装置对PTA粉料作连续计量后加入到浆料配制罐中,通过振动筛把粉料中夹带的异物除去,以防损坏称量装置.在搅拌器的作用下,浆料配制连续进行,PTA和EG溶液在浆料配制罐中形成均匀的浆料悬浮液并产生大量EG蒸汽,装置浆料配制罐设有排空管线,用于排放产生的EG蒸汽和平衡罐内压力.     

研发新品 提升工艺 棉纺业无PVA 上浆指日可待

目前在用的浆料中,PVA浆料由于粘度稳定、成膜性好等优点所占比重很大,在高支高密或涤棉品种织物上应用更为普遍。但是PVA浆料的生物降解性很差,PVA上浆后的退浆废液对酸、碱和微生物很稳定,极难降解,产生COD值极高,造成严重的环境污染。因此,研发和推广有效替代PVA的环保浆料势在必行。同时,要想推广环保浆料,浆纱设备也要随之提升。变性淀粉是研发方向现阶段替代PVA的主攻方向是加大变性     

纳米二氧化钛改性丙烯酸类浆料的制备与浆纱性能

利用纳米TiO2水溶液和多种丙烯酸类单体聚合制备纳米改性聚丙烯酸类浆料。分别用纳米改性聚丙烯酸类浆料、聚丙烯酸类浆料以及PVA浆料和醋酸酯淀粉组成一定规格的混合浆进行单纱及片纱上浆实验,从而进行浆纱性能对比。实验结果显示:用分散的纳米TiO2水溶液和多种丙烯酸类单体合成纳米改性聚丙烯酸类浆料是可行的;改性后的聚丙烯酸类浆料在贴伏浆纱毛羽,提高与纱线的黏附力和改善浆纱耐磨性等方面均比未改性聚丙烯酸类浆料有所改善。     

浆料GDM浆纱性能测试

浆料GDM是以原淀粉作为复合浆料的主要成分,选用合成高聚物和天然高聚物及淀粉降粘剂SPU作为辅助成分配制出的复合浆料,在小样浆纱机上进行浆纱实验,测试浆纱性能,与市售复合浆料进行对比,浆纱效果良好。     

闻香识书

《纺织浆料学》 周永元编著定价:38.00元 本书综合纺织上浆工艺实践,系统地论述了经纱上浆的机理, 上浆工艺参数、浆料选用的原则、各种浆料及辅料的性能、浆料的 配合与调制以及适用于各种纱线的浆液配方,并对浆料性能的检测、 鉴别与剖析做了相应的论述。     

德国成功开发新一代浆料

最近,由德国邓肯道夫纺织工艺研究所开发了以甲壳质和它的衍生物为基质的新一代浆料。这种合成浆料可无条件或在指定的条件下生物降解,使用新的甲壳质基浆料是一种新的对环境友好的加工方法。◆新型浆料可生物降解,天然的甲壳质有改性的潜能,可适应高稳定性纱线织造过程和先进的织机系统的高要求。◆利用超滤膜和沉淀作用使甲壳质浆料可循环使用,成为进一步研究的目标。◆新型浆料的应用可进一步开发功能性纺织品,如织造后浆料保留在织物上,甲壳质浆料的性能赋予产品新的功能(如抗菌性、防霉菌、促使伤口愈合、有效物料定量释放和保湿性)。…     

氯化法钛白粉表面处理研究

文章主要从钛白粉无机表面处理过程出发,分析了钛白粉浆料的分散性、包膜剂的不同用量及加入前后顺序、二氧化钛浆料的pH值对钛白粉包膜处理效果的影响,以及砂磨工艺中砂磨进料浓度及砂磨介质填充率对钛白粉包膜产品的质量影响,阐明分散性、浆料pH值、砂磨机进料浓度及研磨介质填充率是影响氯化法钛白粉表面处理效果的主要因素。     

丙烯酸丁酯接枝浆料的制备及性能

疏水性纤维纱线上浆的浆料以合成浆料PVA为主。PVA的优点是对疏水性纱线亲合性好、浆膜强韧性好、浆纱耐磨性好;不足之处是煮浆时间长、易结皮、退浆困难,退浆后废液中的PVA在自然环境下不易降解,会造成较严重的环境污染,所以世乒环保组织将要禁止使用PAV浆料的织物进入世界市场,不少西方国家已禁止使用该浆料。近年来丙烯酸类浆料发展较快,从二元、三元共聚发展到多元共聚。     

Diffusion and usage of public e-services in Europe: An assessment of country level indicators and drivers

We analyze the state of the art of indicators on e-government, e-health, e-procurement and e-participation. We survey the main methodological properties of these indicators, and highlight their heuristic potential. Further, we address empirically the issue of the explanation of the availability scores, i.e. how the supply of the various e-services in each country is affected by political, institutional and socio-economic differences, and is followed by actual usage. The econometric analysis uncovers the importance of broadband penetration and higher education as drivers for most of the types of e-services and users (citizens and businesses). Moreover, a corruption-free and agile public sector proves to be an important pre-condition for more effective supply and usage. Despite data limitations and the complexity of the underlying diffusion phenomena, our study is the first truly longitudinal contribution aimed at disentangling the common drivers of such an important phenomenon – the e-services availability and usage across European countries. As such, this work appears useful to inform the policy debate and practice, in a phase characterized by a prospective reorientation of the public e-services provision and policy agenda.     

Assessing nutritional status and nutrition-related knowledge,attitudes and practices of Albanian schoolchildren to support school food and nutrition policies and programmes

In Albania, many children exhibit poor nutritional status, have unhealthy diets and inadequate physical activity. Yet, comprehensive studies on the nutritional status, food and nutrition knowledge, attitudes and practices (KAP) are largely non-existent for Albanian school-age children.To fill these important gaps, a nationwide survey was conducted in Albania in 2017–2018 to assess the nutritional status and the nutrition-related KAP of Albanian school-aged children.The study consisted of a nationally representative sample of 7578 Albanian schoolchildren from all regions of the country. In addition, 6810 parent questionnaires were collected, along with interviews with the directors of all involved schools, 311 teachers and 53 key informants representing local authorities in all districts of Albania. Data collection consisted of anthropometric measurements of children and structured questionnaires administered to children, their parents, teachers, school directors, and key informants.The survey is unique in both the scope of the respondents involved, and in the breadth of content area covered, and as such, makes an important contribution not only to Albania, but also to the field of research in food, health and nutrition for school-age children.This paper presents the preliminary findings from the KAP survey that will help influence policies for actionable advancement on the commitments and priorities of Albania to improve food security and nutrition. In particular, the study findings will support the development of a national school food and nutrition programme in Albania embedded into the local food system and the design of food and nutrition educational materials and campaigns to promote healthy diets and practices among both school-age children and the Albanian population.     

BIM与VR技术在装饰工程设计阶段的应用分析

为了解决装饰工程设计阶段存在的设计图纸协同性较差、设计效率低,施工中存在专业碰撞及安全隐患等问题,运用BIM与VR技术并结合实际户型案例,通过构建带有参数属性的可视化设计体系,从可视化、虚拟体验、自主设计、装饰预算、碰撞检查、图纸生成等方面进行设计流程分析,探讨了BIM与VR技术在装饰工程设计阶段所带来的创新及应用价值。结果表明,BIM与VR技术在提高设计师设计效率、增强业主参与度、保证后期施工质量、降低装饰成本、提升业主满意度等方面均发挥了积极作用。BIM与VR技术为设计师和业主带来极大便利,将有可能逐步取代传统装饰工程设计流程。     

工程造价司法鉴定专家证人制度浅析

随着科技、经济的不断发展,诉讼案件越来越多样化、复杂化,经常涉及一些专业的问题,给法官的审判带来种种困难.尤其是建设工程案件,工程造价的鉴定尤为复杂,鉴定机构和鉴定人员的专业水平参差不齐,这让法官审判更是难上加难.最高人民法院于2019年对《最高人民法院关于民事诉讼证据的若干规定》进行了修正,对专家证人做了明确的规定与...     

环境影响评价及验收费计算标准研究

随着国家和社会越来越重视环境保护,环境影响评价工作的要求越来越高,工作内容越来越复杂,咨询收费也发生较大变化,在建设项目可研和初步设计阶段科学合理的计算环境影响评价费及验收费是合理确定投资的一项重要工作.文章首先对目前环境影响评价及验收费现状进行分析总结,为开展环境影响评价及验收费计算优化提供基础,然后依据国家现行的法...     

Perspectives of gatekeepers in the Kenyan food industry towards genetically modified food

Attitudes and perceptions of stakeholders are crucial in the acceptability of GM foods. Past research focussed on consumers, but paid little attention to the food industry and its gatekeepers, especially in Africa. Therefore, a survey was conducted covering 39 respondents from the milling industry and supermarkets, the main processors and distributors of maize products, in seven urban centres of Kenya. Respondents, mostly from senior management, were well educated and had a good knowledge of biotechnology. Their major sources of information were the media for the supermarkets, and brochures and the food industry for the milling companies. Respondents generally appreciated the benefits of biotechnology, but had concerns about the environment, although few people considered GM food harmful to human or animal health. Most respondents found traceability of GM products important, but would prefer not to label them because of the costs and possible negative consumer reactions. Respondents were largely non-committal on the use of GM products in their companies, preferring to decide on a case-by-case basis. The few negative responses, mostly from the milling industry, were affected by high risk and low benefit perceptions. Most respondents do not like the idea of labelling GM food. Better communication between research and the food industry is now needed, and more research on the labelling of GM products.     

The locating of emotion within a creative, learning and product orientated design and technology experience: person, process, product

Within this paper, a conceptualised triadic schema is hypothesised for locating emotion within a creative, learning and product orientated Design and Technology experience. The research is based upon an extensive literature review that has been synthesised and juxtaposed with the broad aspirational aims of the subject. The schema, based upon abductive reasoning and grounded theory, ultimately conceptualises the overarching theme of emotion within a creative, learning and product orientated Design and Technology experience within the Primary and Secondary stages of England’s education system. The triadic schema offers an additional opportunity in meta-theorising how the broad aspirational aims of the subject, as outlined in the English national curriculum statement of importance for Design and Technology, can be achieved through recognising the powerful overarching concept of emotion within three emerging domains: Person, Process and Product. The central tenet of this paper is the recognition of emotion within a triadic schema for meta-theorising the place of emotion within a creative, learning and product orientated Design and Technology experience. David Spendlove was previously a senior teacher in secondary education before moving into Higher Education and is now the subject leader for Design and Technology at the University of Manchester. He co-edits both Design and Technology Education: An international Journal and the DATA international research conference proceedings. He is a director of the Design and Technology Association and his research interests are broadly based around learning, pedagogy, creativity, emotion and gender.     

区域数字经济发展与企业融资约束

数字经济发展促进了信息流通和共享,推动了城市治理和服务数字化转型,将有助于改善企业的信息环境和营商环境,进而缓解企业融资约束。本文利用2017~2020年中国城市数字经济指数和A股上市公司数据对这一假定进行了实证检验。结果显示,区域数字经济发展显著降低了企业的融资约束水平,其中,数据及信息化基础设施建设、城市治理和产业融合等细分维度均具有显著影响;进一步地,其影响机制为企业外部信息传播环境的改善和营商软环境的提升。同时,这一影响具有异质性——在国有性质、存续年限更久以及规模更大的企业分组中更大。本文的结论对企业和政府部门制定相关决策,加快推进数字化转型,充分发挥数字经济在经济高质量发展中的作用具有重要启示意义。     

New new technologies: the future and the present of work in information and communication technology

This paper outlines a selection of technological and organisational developments in the information and communication technology (ICT) sector and analyses their likely challenges for workers and trade unions around the globe. It addresses the convergence of telecommunications and information technology, the related developments of ubiquitous computing, ‘clouds’ and ‘big data’, and the possibilities of crowdsourcing and relates these technologies to the last decades' patterns of value chain restructuring. The paper is based on desk research of European and international sources, on sector analyses and technology forecasts by, for instance, the European Union and Organisation for Economic Co‐operation and Development, and some national actors. These prognoses are analysed through the lens of recent research into ICT working environments and ICT value chains, identifying upcoming and ongoing challenges for both workers and unions, and outlining possible research perspectives.