The surface of heat-resistant conveyor belt is covered with micro concave rubber mark. Scar is the most common appearance defect of heat-resistant conveyor belt. The main reasons are as follows:
If the rubber plasticity is too small and the fluidity is poor, if the 3-20 rubber wrapping is not reasonable, especially the small rubber softener is not used properly, the plasticity is poor and the fluidity is poor, it is easy to cause scars. The solution: the reasonable use of softener and plasticizer, the plasticity of the mixture and the strict control of the uniformity of the mixture, and then make the rubber meet the needs of the process, After folding, if the vulcanization speed of flat vulcanizer and rubber is too fast, whether the rubber is still not completely gone, and there is no bright scar in rubber vulcanization. Solution: properly control the vulcanization rate of rubber to 3, and the curing speed of heat-resistant adhesive is very slow, and the crosslinking agent of Chloroprene rubber is zinc oxide and magnesium oxide. If the modified magnesium oxide absorbs water, the activity is not coke proof, Sulfur is often too fast, so the quality control of magnesium oxide is the key to solve this problem. The plastic material is too big or too sticky, which is vulcanized by gas.
如果粘接劑材料粘度過大，當印版硫化機塗膜時，不容易擠出空氣，往往會造成氣痕。所以覆膜塑料的可塑性不能太大，一般大於0.4的手術是不理想的，尤其是氯丁橡膠，由於3-20和丁基苯的粘結性差，如果覆膜塑料的可塑性較大，很少出現亮疤。對產品的要求越來越高，對質量的要求也越來越高，不僅產品的性能、耐久性和外觀都很美觀。傳送帶的外觀質量沒有明確國家明確規定,但參考GB / t7894 - 2001的規定共同的傳送帶,HC的耐熱輸送帶,2297 - 92年化工行業標準,外觀質量執行GB - 526織物芯輸送帶外觀質量標準,耐熱輸送帶的外觀質量是一個重要指標,外觀質量不僅是外觀問題,對產品的研究也是很講究的。
If the viscosity of the adhesive material is too large, when the plate vulcanizer film is coated, it is not easy to extrude air, which often causes air marks. Therefore, the plasticity of the coated plastic can not be too large, and the operation larger than 0.4 is not ideal, especially the neoprene. Due to the poor adhesion of 3-20 and butylbenzene, if the plasticity of the coated plastic is large, there are few bright scars. The requirements for products are higher and higher, and the requirements for quality are higher and higher, not only the performance, durability and appearance of products are very beautiful. The appearance quality of conveyor belt is not clearly defined by the state, but refer to the provisions of GB / t7894-2001 common conveyor belt, HC heat-resistant conveyor belt, the chemical industry standard of 2297-92. The appearance quality is in accordance with the appearance quality standard of gb-526 fabric core conveyor belt. The appearance quality of heat-resistant conveyor belt is an important index. The appearance quality is not only the appearance problem, but also the product research.