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纸浆模塑在国内存在的问题及市场前景预测 总被引:1,自引:0,他引:1
2008年1月8日,国务院办公厅发布了关于限制生产销售使用塑料购物袋的通知,自6月1日起,所有超市、商场、集贸市场一律不得免费提供塑料购物袋,一时间再次引起了人们对“白色污染”的关注。长期以来,为了解决“白色污染”问题,国内外的工作人员曾研制出数种塑料的替代品,如纸浆模塑、植物纤维、可降解塑料等,各种用以解决白色污染的塑料替代品都在其自身的优缺点, 相似文献
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化学物质是现代造纸的重要成分。但是,随着塑料包装向更多纤维包装的过渡,化学的作用变得越来越重要。如今,消费者真正意识到,在包装方面,纤维基材料是塑料的环保替代品。但是,这并不意味着品牌所有者和超市就会马上由塑料包装更换为纸类包装以及其他纤维包装,因为塑料包装仍然具有许多其他纤维包装不具备的功能。这就需要化学研发和技术引领,通过技术研发进一步提高塑料替代品包装材料的功能性、实用性,推动纸类包装等领域的发展,以寻求更多可持续的塑料替代品,满足社会发展的需要。 相似文献
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可降解塑料作为“限塑令”大环境下的替代品, 在食品相关产品领域受到越来越多的关注。本文总结了国内外塑料监管要求、可降解塑料的分类、在食品相关产品方面的应用及相关国家标准的质量安全要求, 综述了不同种类可降解塑料在食品相关产品方面的应用及优缺点, 建议生产企业在关注可降解塑料耐热性、气体阻隔性、成本及机械性能方面的同时, 也需要更多地关注这些材料在食品安全上的风险评估, 使可降解塑料更好地应用于食品相关产品。 相似文献
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<正> 模块式塑料输送带起源于25年前,当时美国一家生产自动剥虾机的Laitram公司,曾对机器的运载部分进行研究分析,发现所用的金属网带很容易生锈,且不易清洁,大大影响其应用性,也不利于食品工业的应用;对于高度自动化的食品处理来说,输送带部分显得极为重要。随着塑料替代品的不断出现,启发了成立美国英特乐公司(Intralox,Inc.)的J.M.Lapeyre先生对塑料模块式输送带的发明。其后,他更意识到塑料输送带不仅可用于剥虾机上,对其他要求高度卫生的 相似文献
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皮革替代品不具有皮革同样的抗断裂和抗撕裂性,也不具有同样的透气性,更不用说吸收水气的能力。不管制造商怎么说,皮革替代品无法与皮革媲美。总而言之,替代品甚至没有说的那么环保,因为这些替代材料通常是由塑料衍生物组成的,无论是全部还是部分。La Conceria报道,为了阐明皮革及其仿制品之间在层次结构、性能和可持续性的区别,领先独立的德国研究机构FILK(Forschungsinstitut für Leder und Kunststoffbahnen)在其开源科学平台MDPI上分享了这项研究。 相似文献
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中国古典家具是中国文化的重要细戊部分,而材料又是构成古典家具的物质基础。中国古典家具除具有材料的基本功能外,还具有其特定的情感。本文采取定量的模式来描述中国古典家具的造型材料与感性意象的对应关系,探讨中国古典家具材料的感觉特性,其结果可用于支持中国古典家具开发设计。 相似文献
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Wörle-Knirsch JM Kern K Schleh C Adelhelm C Feldmann C Krug HF 《Environmental science & technology》2007,41(1):331-336
Metal oxides may hold, as nanosized particles, a toxic potential to human health and the environment that is not present in the bulk material. Due to the high surface-to-volume ratio, small amounts can lead to strong oxidative damage within biological systems, impairing cellularfunctions as a consequence of their high surface reactivity. We report here on a new nanosized V203 material that has a needle-like structure with diameters of less than 30 nm and variable lengths. The potentiated toxicity of nanoscale vanadium oxide (V203) compared to bulk material is demonstrated here in human endo- and epithelial lung cells, and might be due to the higher catalytic surface of the particles. Reduction in cell viability is almost ten times stronger and starts with lowest concentrations of "nanoscaled" material (10 microg/mL). Vanadium oxide leads to an induction of heme oxygenase 1 (HO-1) in a dose dependent manner in ECV304 cells whereas a reduction in protein levels can be observed for the epithelial cells (A549). Lipid peroxidation can be observed also for "nanoscaled" vanadium oxide to a much stronger extent in macrophages (RAW cells) than for bulk material. The observed effects can not only be explained by oxidation from V2O3 to V2O5 as there are significant differences between the novel nano vanadium and all used bulk materials (V203 and V205). It appears rather to be a nanoeffect of a high surface reactivity, here coupled with a yet unknown toxicity potentiating effect of a technically important catalyst. 相似文献
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Since the bovine spongiform encephalopathy crisis, there has been a growing interest for finding an alternative source of raw materials for gelatin production. Gelatin produced from fish processing by-products is a potential alternative to mammalian gelatin. Fish processing generates solid wastes that can be as high as 50-80% of the original raw material. These wastes are an excellent raw material for preparation of high protein foods. About 30% of the wastes consists of skin and bone with a high collagen content. Fish gelatin can be obtained by hydrolysis of collagen the principal protein found in skin and bone. Fish skin and bone gelatin can be prepared with bloom strength similar to that obtained from mammalian sources. Fish gelatin has numerous applications, particularly, in the food, pharmaceutical, and photographic industries due to its unique chemical and physical properties. This review presents how fish processing by-products can be utilized in the manufacture of gelatin. 相似文献
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《Food Reviews International》2013,29(2):159-174
Since the bovine spongiform encephalopathy crisis, there has been a growing interest for finding an alternative source of raw materials for gelatin production. Gelatin produced from fish processing by-products is a potential alternative to mammalian gelatin. Fish processing generates solid wastes that can be as high as 50–80% of the original raw material. These wastes are an excellent raw material for preparation of high protein foods. About 30% of the wastes consists of skin and bone with a high collagen content. Fish gelatin can be obtained by hydrolysis of collagen the principal protein found in skin and bone. Fish skin and bone gelatin can be prepared with bloom strength similar to that obtained from mammalian sources. Fish gelatin has numerous applications, particularly, in the food, pharmaceutical, and photographic industries due to its unique chemical and physical properties. This review presents how fish processing by-products can be utilized in the manufacture of gelatin. 相似文献
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分析了小本体聚合法生产的聚丙烯粉体的原料特性。提出只要采取一系列的工艺技术和设备措施,就能直接使用聚丙烯粉体作原料,生产出质量优良的粗旦丙纶长丝,取得较好的经济效益。 相似文献
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将涤纶纤维进行不同收缩率,不同纤度,不同孔形的三异化设计,就能赋于织物特殊的外观和手感。三异纤维是理想的仿真丝纤维。文中对三异纤维的工艺路线进行了探讨,认为采用收缩性不同的两种涤纶切片,利用双螺杆复合纺丝技术生产出总纤度小于111dtex的三异纤维的工艺路线是先进的。 相似文献
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金属/陶瓷层状结构复合材料及热镀锌内加热器 总被引:1,自引:0,他引:1
热镀锌行业存在锌液腐蚀问题,内加热器由于材料限制不能做成大尺寸,不能解决大尺寸锌锅内加热问题。利用金属黏接的复合技术,将陶瓷材料和金属材料复合成复合材料套管。复合材料同时具有优良的耐熔锌腐蚀性和高的力学性能,复合材料的抗折强度增至2 700 MPa,导热性良好,加热器的内外温差仅约100℃。利用复合材料套管制造的热镀锌用内加热器,可制成任意尺寸,采用能源主要有电、气、油等,具有寿命长、成本低、使用方便、维修容易等特点,彻底解决锌锅的内加热问题。 相似文献
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