• 原理、分类、选择和剂量的消泡剂
    原理、分类、选择和剂量的消泡剂

    2023-08-30

    水处理的泡沫问题已经困扰很多人,出道的最初的泡沫,表面活性剂泡沫,泡沫,影响过氧化泡沫,循环水治疗non-oxidizing杀菌剂产生泡沫,等等,在水处理中使用消泡器是越来越普遍,本文全面介绍了原理、分类,去沫剂的选择和用量!泡沫消除方法1。物理方法从物理的角度,消除泡沫的方法主要包括挡板的位置或过滤器、机械搅拌、静电、冷冻、加热、蒸汽、辐射照射,高速离心,压力和压力降低,高频振动,瞬时放电和超声(声学液体控制),等等。所有这些方法促进气体传输速率两端的泡沫液膜和液体放电电影不同程度。泡沫的稳定系数小于衰减因子,和气泡的数量逐渐减少。然而,这些方法的共同缺点是使用环境因素强,消泡率不高,优势是环境保护和重用率高。2。化学方法去除泡沫的方法从化学的角度主要包括化学反应法和添加消泡剂的方法。化学反应方法之间的化学反应是指发泡剂,发泡剂添加一些试剂,会产生一种物质,不溶于水,从而减少表面活性剂的浓度的液膜,促进泡沫的破裂,但这种方法有缺点的不确定性等复合发泡剂和伤害造成的系统设备不溶性物质。如今,最广泛使用的消泡方法在各行各业的方法添加消泡剂。这种方法的最大优点是它有消泡效率高和易于使用,但是找到一个合适的、高效的消泡剂是关键。 Principles of defoamer Defoamer, also known as defoamer, has the following principles: 1. The local surface tension of the foam is reduced, resulting in the collapse of the foam The origin of this mechanism is that high alcohols or vegetable oils are sprinkled on the foam, and when they dissolve into the foam solution, the surface tension there is significantly reduced. Because these substances are generally less soluble to water, the reduction in surface tension is limited to local areas of the foam, while the surface tension around the foam hardly changes. The portion with reduced surface tension is strongly pulled around, extended, and finally ruptured. 2.Damage the membrane elasticity and cause the bubble to burst When the defoamer is added to the foam system, it diffuses to the gas-liquid interface, which makes it difficult for the surfactant wit...

    阅读更多
  • 包装材料技术|你知道5复合软包装的方法?
    包装材料技术|你知道5复合软包装的方法?

    2023-08-26

    随着市场经济的发展,各行业对软包装的需求也逐年上升。灵活的包装材料和加工技术的发展不断改善,软包装在许多领域发挥着日益重要的角色,那么复合软包装的方法是什么呢?本文简要描述了五个复合软包装的方法,和内容是参考朋友的胶粘剂供应链:软包装复合软包装行业的“复合”实际上是“纹理”的意思,这是让这部电影不同的属性以某种方式粘在一起,然后密封保护内容。软包装复合处理方法主要包括复合干,湿复合,挤压复合、共挤压复合等等。每个化合物的方法都有优点和缺点,全面了解,以避免偏见!01干化合物在各种处理技术的复合膜,干燥的组合是最传统的和广泛使用的复合技术在中国,适合复杂的品种、小批量和各种各样的包装产品。广泛应用于食品、医药、化妆品、日用品、轻工产品、化工、电子产品和其他包装。干复合涂层与涂层设备(通常使用凹印电缆辊涂)在塑料薄膜上涂上一层溶剂型胶粘剂,重新油漆的溶剂移除机器和干,在热压和其他基质复合,如电影、铝箔粘合成一个复合膜,过程如下图所示,因为它是在胶粘剂“干燥”状态(无溶剂状态)合成的。因此得名干燥的化合物。干燥组合适用于各种复合膜衬底和电影和铝箔纸复合,广泛应用,优秀的耐化学介质腐蚀,如食品与碱、酸、辣、油脂及其他原料,化妆品与水,味道,乳化剂和其他成分,化学物质和溶剂、杀虫剂和其他成分,广泛应用于包装的恶劣环境下的内容。 With high composite strength, good stability and high product transparency, it can produce both high and mid-range composite films, and can also produce frozen, fresh-keeping or high-temperature sterilization composite films. Easy to use and flexible, simple operation, suitable for multi-variety, batch less production. However, the dry compound itself also has defects of poor safety and hygiene, environmental pollution and higher cost, and the development of alcohol-soluble and water-soluble adhesives has slowed down the pressure of solvent-based adhesives in terms of safety and hygiene, environmental pollution and cost to a certain extent. ...

    阅读更多
  • 设备和方法粘贴复合铝箔
    设备和方法粘贴复合铝箔

    2023-08-24

    复合铝箔的胶进行粘合机,提供一个开放的滚动的铝箔和纸或塑料薄膜和复合铝箔卷纸轴,一个盘子举行粘合剂,粘合剂涂层辊系统,还包括一个导辊,压扁辊、压辊,加热辊、冷却辊和一个温度和张力调整装置。复合铝箔的粘合方法是湿法、干法和热固性方法。湿粘结湿粘结方法粘贴铝箔和复合层在潮湿状态和水溶剂或水分散粘合剂,然后干燥和蒸发水,所以所需的复合层有一定的渗透率和孔隙度。湿键通常用于层压。绑定应该溶于水或用水稀释。它们可以蛋白质绑定如胶水、动物胶和casuran,或碳水化合物绑定,如淀粉、糊精和纤维素。有机或无机粘结剂如玻璃水,丙烯酸,变性醋酸乙烯酯和乙烯-醋酸乙烯共聚物也可以被使用。粘结剂通常是中性的,但它也可以略微碱性腐蚀铝箔略,从而坚定。最常用的绑定是硅酸钠(水玻璃、发泡碱)和醋酸乙烯酯。水玻璃是便宜,但干燥后会变得脆弱,长期储存后变成黄色。 Vinyl acetate is strong, soft and resistant to water, but it is expensive. Dry bonding Dry bonding is used to bond plastic films that are not breathable. Binder is divided into three kinds: vinyl acetate, vinyl chloride and other solvent-based; Cellulose nitrate, acetaldehyde cellulose, formaldehyde cellulose and other fiber types; Synthetic rubber and acrylic resin copolymer and other types. Dry bonding first dissolve the binder in a volatile solvent, such as acetone and ethanol, coated on aluminum foil, dried, and then pressed together with the film with a certain pressure. Considering that the drying temperature (about 240 -- 250 ° C) exceeds the temperature tolerance of the plastic film and the physical and chemical action of the solvent on the plastic film, the binder is usually coated on the aluminum foil. In order to improve the pasting fastness, the plastic film should be treated by corona before pasting. In wet and dry pasting, the variety, concentration, viscosity, solid content (kg/m3), operating temperature and coating amount of the binder all affect the bonding fastness and operation speed, which should be determined according to the characteristics of the composite layer material. Thermosetting bonding Thermosetting bonding is divided into two kinds: coated wax bonding and coated polyethylene bonding. Wax-coating bonding is to paste the paper onto the aluminum foil with molten paraffin as the adhesive. According to the melting temperature of...

    阅读更多
  • 研究水性压敏胶的特点和应用
    研究水性压敏胶的特点和应用

    2023-08-18

    水性压敏胶是一种粘合剂,使用水作为溶剂和压敏,也就是说,它可以迅速地遵守表面轻微的压力时。因其环保、无毒,符合成本效益,可调节粘度和其他优势,它已逐渐成为主流产品的压敏胶粘剂的市场。根据不同的系统,水性压敏胶粘剂分为水性丙烯酸酯体系,水性聚氨酯体系,水性乳胶系统和水性有机硅系统,等等,这是应用最广泛的,因为水性丙烯酸酯体系的可调范围宽性能,丰富的应用场景,和高成本的性能特征。水性压敏胶的特点1、强附着力:水性压敏胶可以形成一个统一的粘合剂层不同类型的基质,与其他化学胶粘剂相比,其附着力更强,并能应对不同的条件,如温度、湿度、等。2、干燥快:水性压敏胶固体含量相对较高,容易挥发在处理,干燥时间快,处理效率高。3、环保:水性压敏胶的制备不需要有机溶剂的使用,减少环境污染和安全风险,较低的波动性和低VOC含量。水性压敏胶的应用1。标签和贴纸:如不干胶标签,便利贴,装饰贴纸,贴纸,等。2。医用胶带/酱:如创可贴、酱,外科敷料等。3。工业胶带:如各种压敏胶带、透明胶带、BOPP薄膜胶带、布基胶带、双面胶带、泡棉胶带、密封胶带,纸胶带、高温胶带等。4。塑料薄膜类,如PE、PP、PVC和聚酯薄膜。此外,水性压敏胶可应用于多种底物(如泡沫、无纺布、尼龙面料,等等)自粘的处理,鞋材料、纸制品、等,还可用于高档工艺品加工、特种纸产品。对于这些特定的应用程序和不同的涂层方法,基因内区发展水性压敏胶粘剂,每一个都有不同的固体含量和粘度来满足他们的特定用途。 5.Make up and protect yourself 6.A kind of water-based pressure sensitive adhesive system made by special synthesis process and formula combination can also be used in beauty care scenes, with skin-friendly effect to prevent allergies. Water-based pressure sensitive adhesive (Universal)

    阅读更多

dyyseo.com

Baidu
map