Development of cloth washing methods for the purpose of reducing detergent

本研究的目的是减少洗涤剂的量相比，由商业洗衣机。进行了以下两种实验：将10至30张充分浸泡在洗涤液中的织物样本在水平铁板上堆叠成层。将一根不锈钢棒（φ 26 mm，710 g重）从30 cm高度处落在堆叠的织物上，其端部横截面向下。(1)人工污染的棉织物在环形区域变得更加白色的状态下被清洁，该环形区域大致对应于杆的平坦底部与织物接触的边缘。也就是说，接触区域的周边的洗涤性能高于内部。这表明落杆引起的流动的重要性。(2)织物材料（棉或涤纶）的差异对污垢的去除没有影响。总之，这种冲击压力法是很好的洗涤方法.利用脉动流的洗涤方法的实验。这种方法包括通过置于圆筒中的两个隔距之间的织物的脉动流，以将有益的机械效果导入到脏织物片上，例如织物对隔距的变形碰撞和液体流通过织物的渗透。(1)通过这种方法显示出的去污力几乎是商业洗衣机的两倍。(2)通过将气泡以20%的体积比混入液体中，去污性能不降低，这意味着去污剂减少约20%。

This research has the objective of reducing the amount of detergent in comparison with that by a commercial washing machine. The following two kinds of experiments were carried out :10 to 30 sheets of fabric swatches well soaked in wash liquid were piled into layers on a horizontal iron plate. Arod of stainless steel (φ26mm, 710g weights) was dropped, with its end cross section downward, on the piled fabrics from the height of 30 cm. (1) The artificially soiled cotton fabrics was cleaned with the state that it became more white in the area of ring-shape which approximately corresponds to the edge of the flat bottom of the rod contacting with fabrics. That is, the washing performance of periphery of the contact area is higher than the inside. This suggests the importance of flow induced by the falling rod. (2) Difference in material of fabrics (cotton or polyester) did not affect on the removal of the soil. In conclusion, this impact pressure method is good for washing.2. Experiment on the washing method utilizing pulsating flows.This method consists in pulsating flows through the fabric placed between two gauges in a cylinder in order to import beneficial mechanical effects to sheets of soiled fabric such as deformation clash of the fabric against the gauges and penetration of a liquid flow through the fabric. (1) Detergency was shown by this method to be almost two times higher than that possible by a commercial washing machine. (2) By mixing air bubbles into the liquid with the ratio of 20% in volume, the performance of detergency does not decrease, which means reduction of detergent by about 20%.