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On July 22nd, Chemical & Engineering News (C&EN) of the United States released the “Top 50 Global Chemical Companies 2024”. Eleven Chinese-funded chemical enterprises have made it into the top 50 globally, namely: Sinopec, petrochina, Formosa Plastics, Synthetics under Sinochem Group, Rongsheng Petrochemical, Wanhua Chemical, Hengli Petrochemical, Dongfang Shenghong, Tongkun Holdings, Hengyi Petrochemical, and Xinfengming Group. Among them, Dongfang Shenghong and Xin Fengming Group made their debut on the list.
When selecting glue and using the machine, the parameter “viscosity” is often seen. Some people ask, “What is viscosity? Is high or low better?” Simply put:Viscosity refers to whether hot melt adhesive is thick or thin after melting. It directly determines whether the glue can penetrate into the paper seam, whether the glue is applied […]
What is the difference between sticking the same glue to different papers? Many printing factories have found that the same batchhot melt adhesive pelletsThe double adhesive paper is very firm, but when replaced with copperplate paper, the pages will fall off. This is not a problem with the glue, but rather determined by the surface […]
How to interpret the numerical meaning of hot melt adhesive models? What do 292, 296, 391, and 39B represent respectively When purchasing hot melt adhesive, many customers are confused by the model: “What is the difference between 292 and 296?” “Why can 391 be spread evenly?” “What kind of adhesive is 39B? These numbers are […]
What causes white spots and bubbles in the adhesive layer? Directly provide the order of investigation:Moisture absorption of adhesive particles → high temperature of adhesive glue → stirring and rolling into air → surface moisture of substrate → suction of adhesive pumpAccording to this order, over 90% of the white spot bubble problems can be […]
