尿不湿（自动播放）

nullnull自从有了ta，妈妈再也不用担心我尿裤裤啦~~null尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿尿不湿nullnullnullnull唐鑫源“太空衣之父”“尿不湿之父”null▓ 1942年：基于对一次性产品的需求，一种无论从材料和使用性能都优于布尿布的一次性纸尿裤在瑞典研制成功。 ▓ 1961年：一次性纸尿裤(片)正式进入美国市场。其特点是：简单，长方形形状； 没有弹性，没有粘贴胶带。 ▓七十年代纸尿裤的外形技术取得实质性改变。其特点是：引入粘贴胶带，抛弃了外用固定装置；生产适合不同年龄婴儿的尺码。null▓ 八十年代：纸尿裤的吸收性能技术取得了改进。其特点是：使用了超强吸水材料(AGM)。两侧隔边有弹性；反复使用的自由粘贴胶带；有腰部形状设计；柔软的吸收表面。 ▓ 九十年代：纸尿裤的整体性能得到进一步完善。其特点是：更薄、吸收力更强的吸水核心；超强的干爽性；可自由弹性伸缩,更加贴合宝宝的体形；采用更柔软的材料，穿着更舒适。null▓ 九十年代末：纸尿裤在皮肤保护和外形设计上得到进一步发展。其特点是：芦荟和凡士林表层更薄、吸收力更强的吸水核心；象布一样柔软；根据婴儿体型特点和活动要求的设计。 ▓ 而今天，帮宝适已经设计出超级吸收材料和吸收体结构，加入了吸水力最强、绝不渗漏的高分子，并使每片纸尿裤的重量降低到40克。妈妈的幸福时代完全来临了。 null尿不湿，不仅仅是小孩子用的。你懂的…null尿不湿？？？奥运会null如此神奇传说中的尿不湿神马材料？？？null曾被用来制造“尿不湿” 高分子中含有大量的亲水基团——羟基。 null尿不湿填充物的活性成分——聚丙烯酸钠 尿不湿填充物聚丙烯钠中通过保留一些羧基而使其接近中性。 带有正电荷的钠离子和带有负电荷的羧酸根离子的亲水性比氢键要强得多。null人们想了怎样的办法来增强高吸水材料的保水性的呢？ (1) 亲水基团含量越多、亲水性越强，保水性越好；(2) 适度交联，形成网状结构。null交联剂 聚丙烯酸及其盐交联后的产物结构示意图 丙三醇通过酯化反应进行交联 通过加聚反应进行交联 null高吸水树脂的吸水机理 高分子网络是固态网束，未电离吸水中，高吸水树脂有何变化？ 首先水分子通过氢键与树脂分子链上的大量亲水基团发生水合作用，亲水基团离解。电离产生的阴离子固定在高分子链上，阴离子之间的排斥作用使高分子网束张展，形成孔穴。 吸水前，高吸水树脂呈什么状态？nullnullnull绿色高吸水树脂作为一种新型功能高分子材料因其高吸水能力、高保水能力、重复吸水能力以及高度的安全无毒性，近年来在国民经济及人们生活中发挥了越来越重要的作用，尿不湿只是一个典型的实例 。null 谢谢欣赏！ 主创：汪蒙 参与策划：魏文超，王子叶，王家红，林丹 ， --------------段薇，陈国伟 PPT制作：周林 鸣谢：百度百科 万方数据 维普数据 2011-5-23