The Study of Adhesion Strength of Different Physical Pre-treatments on Two-step Dip System of Conveyer Belts

• Main Authors: Chen, shihyang, 陳仕洋
• Other Authors: Hsing, wenhao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/55720346401107921523

碩士 === 中國文化大學 === 化學工程與材料工程學系奈米材料碩士班 === 100 === This research is to study the high strength polyester/nylon fabric pre-treat by microwave, oxygen plasma and far-infrared, for the purpose of making better wetting ability and fiber surface got rougher. And surface activate by dipping isocyanate solution. Improve the coating performance and activation of RFL solution, in order to the hot pressing with rubber for conveyor belt product has better adhesion strength. In this study, the high strength polyester/nylon fabric has been treated both side by the following conditions, 490W with 60s by microwave, 240W with 60s by oxygen plasma, and 200℃ with 20s by far-infrared. As the result of treatments, the fiber surface changed from smooth to rough and etching effect was occurred after treated, the surface area of fiber was increased as well. The contact angle testing is by glycerol dropping the fabric and testing 15s with interval between 0.5s to get a data. The wetting ability was improved after treated, and the absorption rate is faster than the untreated fabric. The final contact angle of untreated fabric is 25.4 degrees, and the best final contact angle of treatment condition is that first treat by oxygen plasma then treat by far-infrared, the final contact angle is 14.1 degrees. The tensile broken strength is decreased to 13.99%, the treatment condition is that first treat by oxygen plasma then treat by far-infrared, it is within industry standard for less than 15%. The pick up ratio is 32.63%, the treatment condition is that first treat by microwave then treat by far-infrared. The pick up ratio is about 31.35% of pre-dipping fabric, the treatment conditions are that first treat by far-infrared then treat by microwave, and first treat by microwave then treat by oxygen plasma. After pre-dipping without pre-treatment, the adhesion strength of fabric and fabric layer compared with the untreated has raised up to 12.7kgf (23.30%), and fabric and rubber layer has raised up to 12.1kgf (28.72%). With both of pre-treatment and pre-dipping, the adhesion strength of fabric and fabric layer compared with the untreated has raised up 17.3kgf (69.96%), the treatment condition is that first treat by oxygen plasma then treat by far-infrared. The adhesion strength of fabric and rubber layer has raised up to 18.5kgf (96.81%) the treatment condition is that first treat by far-infrared then treat by oxygen plasma.