共查询到19条相似文献,搜索用时 171 毫秒
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聚丙烯(PP)熔喷布表面自由电荷易在湿气等作用下流失,导致过滤层及口罩快速失效。针对以上问题,采用静电纺丝技术在PP熔喷布基体上制备压电聚(偏氟乙烯-三氟乙烯)(P(VDF-TrFE))纤维层,得到PP熔喷布/P(VDF-TrFE)改性过滤层。探究了纺丝工艺对压电纤维形貌和结构的影响,进一步分析了改性过滤层经过水洗、蒸汽等耐久性处理后的静电压、烟雾过滤效率和透气性的变化。结果表明:PP熔喷布/P(VDF-TrFE)改性过滤层对PM2.5的过滤效率较PP熔喷布提高了25%,在进风量为85 L/min时的过滤效率提升了27.5%;经过2次水洗、紫外线照射、蒸煮消毒等方式处理后的改性过滤层,其表面电荷具有多次弯折后可再生的特点,过滤效率维持在90%,有效提高了口罩的防护效率和使用寿命,压电材料在外力作用下可产生束缚电荷,改善了过滤层负载电荷的稳定性,从而提升了口罩防护的长效性和安全性。 相似文献
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《中国纤检》2021,(4)
为了更好地了解口罩带的佩戴张力对口罩泄漏性的影响,本论文选择男、女两名成年受试者分别佩戴6种不同过滤效率材质的一次性折叠型口罩,测试原样以及佩戴张力分别为5N、10 N、15 N、20 N、25 N条件下口罩的总泄漏率。结果表明,口罩带的张力对泄漏性的影响不容小视,但也不是张力越大越好,要考虑到佩戴时的舒适性,选择15N最佳;同时为了改善口罩的泄漏性,除了考虑口罩带的张力,在选用口罩原材料时也应考虑材料的贴肤性,以便能使口罩与皮肤有更好的密合;在口罩过滤元件的选择上,尽量选择过滤效率高的材料。此研究可为口罩生产企业进行口罩设计、为消费者选购和佩戴口罩时提供依据。 相似文献
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受新冠肺炎疫情影响,口罩、防护服等防疫物质需求暴增,尤其是3月下旬以来,随着疫情在世界范围内的蔓延,口罩的出口市场巨大需求,彻底打破了卫材行业的供需平衡,从最初的口罩机到熔喷布,再到纺粘布、热风布、ES纤维,甚至更上游的PE和PP切片,价格依次暴涨,卫品产业链一片混乱。大批原来依托卫品行业生存的设备厂、非织造布厂都纷纷转产各类口罩用布,各种理由的断供、订单取消成为行业现状,原来一直在行业中掌握话语权的卫品企业被推到了无布可用的尴尬境地。 相似文献
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非织材料高性能口罩有效防范SARS 总被引:1,自引:0,他引:1
介绍了康那香公司生产的能有效防范SARS病毒的非织材料高性能N95型口罩 ,以及其他种类和不同等级的口罩系列。该系列口罩系用聚丙烯熔喷非织造布经过静电加工制成的滤材制作而成 相似文献
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介绍了我国医药行业的3个口罩标准GB 19083-2010《医用防护口罩技术要求》、YY 0469-2011《医用外科口罩》、YY/T 0969-2013《一次性使用医用口罩》,对比分析在外观结构、耐用性、舒适性、毒理性、卫生性、防血液防水、过滤防护、阻燃性能、包装标识等9个方面的考核指标以及试验方法的不同,并总结阐述了医用口罩的防护机理、医用口罩的生产条件以及在医院领域3种医用口罩分别的适用场景。 相似文献
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对我国现行的GB/T 38880-2020《儿童口罩技术规范》、FZ/T 73049-2014《针织口罩》、T/GDMDMA 0005-2020《一次性使用儿童口罩》、T/ZFB 0004-2020《儿童口罩》和T/AQB 01-2020《一次性使用儿童口罩》5项儿童口罩标准进行对比分析,重点分析了基本要求、外观质量要求、安全性、防护性、舒适性、卫生性、耐用性、标识和安全警示等多个方面的内容,并针对儿童口罩、熔喷布生产企业及家长给出了相关建议。 相似文献
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Xianghui Yan Zheling Zeng David Julian McClements Xiaofeng Gong Ping Yu Jiaheng Xia Deming Gong 《Comprehensive Reviews in Food Science and Food Safety》2023,22(2):1312-1336
Interactions between plant-based proteins (PP) and phenolic compounds (PC) occur naturally in many food products. Recently, special attention has been paid to the fabrication of PP–PC conjugates or complexes in model systems with a focus on their effects on their structure, functionality, and health benefits. Conjugates are held together by covalent bonds, whereas complexes are held together by noncovalent ones. This review highlights the nature of protein–phenolic interactions involving PP. The interactions of these PC with the PP in model systems are discussed, as well as their impact on the structural, functional, and health-promoting properties of PP. The PP in conjugates and complexes tend to be more unfolded than in their native state, which often improves their functional attributes. PP–PC conjugates and complexes often exhibit improved in vitro digestibility, antioxidant activity, and potential allergy-reducing activities. Consequently, they may be used as antioxidant emulsifiers, edible film additives, nanoparticles, and hydrogels in the food industry. However, studies focusing on the application of PP–PC conjugates and complexes in real foods are still scarce. Further research is therefore required to determine the structure–function relationships of PP–PC conjugates and complexes that may influence their application as functional ingredients in the food industry. 相似文献
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描述了汽巴精化公司生产的一种高分子改性剂Irgatec CR 76.Irgatec CR 76用于PP品级的受控降解,特别用于PP纤维和非织造布的生产,能明显地改善标准PP品级、纤维和非织造布的性能.添加剂对加工、贮存和使用的安全性,是从过滤等产业用途到卫生用品的广泛用途的基础. 相似文献
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Balwinder Singh Jaspreet Singh Jatinder Pal Singh Amritpal Kaur Narpinder Singh 《International Journal of Food Science & Technology》2020,55(6):2273-2281
Potato peel (PP), a by-product of food processing industry, comprising 6–10% of tuber is mostly considered as a waste. Potato peel waste (PPW) can be utilised as a natural source of antioxidants that otherwise may create disposal-related problems leading to environmental pollution. Valorisation of PPW is a fascinating area of research and is in the interest of potato-based food processing industry. PP contains phenolic compounds (mainly chlorogenic, caffeic and ferulic acids), that are known for bioactivities. Phenolic acids from PP can be efficiently recovered by improving the efficiency of extraction methods. Phenolics extracted from PPW have an immense potential for utilisation as sources of antioxidant and functional components in food. PP extract (PPE) has been evaluated for protective (antioxidant, antidiabetic, hepatoprotective and antibacterial properties) effects and can be projected as a potential source of phenolic compounds beneficial for human health. 相似文献