Research And Development Of Environmental Protection Process And Applicable Performance Of The Polymer Pen Tip Manufacturing

China is big country of the world's cultural and educational office supplies manufacturer,the marker annual output exceeds 12 billion,the polymer pen tips are the key components for marker pen products,traditional polymer VOCs emissions problems still exist in manufacturing process,the applied research of low emissions of VOCs environmental protection new materials and process development for the sustainable development of the industry is of great significance.This study,by participating the second pollution census work throughout China,the traditional Polymeric pen tip manufacturing pollution in stationery and office supplies manufacturing industry has carried on the investigation,using the field measured method combining material balance algorithm for rubber and the discharge pollutants of thermal shaping process,The weighted final pollution coefficient is 41.67kg/T raw material,and the annual output of pollutants is 5707kg.Based on the investigation of the pollution coefficient of the traditional polymer pen tip manufacturing,the environmental protection process and applicable performance of the polymer pen tip manufacturing were researched and developed.Based on the capillarity principle of the polymer pen tip manufacturing technology,there is no VOCs emission with the low melting point leather core fiber as the bonding material to make polymer pen tip and the water core for the pen tip.The orthogonal experiment was used to investigate the influence of the number of joints,the temperature of the forming partition and the traction speed on the key performance parameters such as the water absorption rate and hardness of the polymer tip.The research results showed that the internal structure and key parameters of the polymer pen tips and the water core for the pen tips maded by the traditional and environmental processes were quite different.The internal aperture of the traditional process products was mainly around 60 ?m,while that of the environmental process products was mainly around 50?m and 25 ?m.Due to the melting layer of the traditional process,the water absorption rate is generally 40-60%,there is no melting layer of the environmental protection process,and the water absorption rate is up to more than 70%,which can meet the high water absorption requirement of the tip and tip with a water wick used for the pen.In the environmental protection process,By adjusting the process parameters such as the number of joints,temperature and traction speed and so on can have a great influence on the hardness and water absorption rate of the pen tip and the water diversion core used for the pen tip within a certain range of the number of joints,temperature and traction speed:The number of shares was positively correlated with the hardness of the pen tip,but negatively correlated with the water absorption;The temperature was negatively correlated with the hardness and water absorption of the pen tip.The traction speed was positively correlated with the hardness and water absorption of the pen tip;In the condition of the number of joint 84,the temperature area is 200 ?/225 ?/238 ?/185 ?,the filament feeding speed is 3.4m/min,and the traction speed is 2.6m/min,making 5?mm polymer pen tip,the hardness can reach 84-86HA,water absorption can reach 68%to 70%;The surface treatment technology is studied,the water diversion used for pen through later being disposed,the water diversion rate can be increased from 1.1mm/s to 4mm/s.The application of macromolecule pen tip environmental protection process can meet the application requirements of all kinds of marker pen products,which has important environmental protection significance for the sustainable development of China's cultural and educational office supplies manufacturing industry.