文章摘要
Effect of Coagulant and Stabilizer on Sliding of Ammonia Free Natural Rubber Latex Film during Molding
Received:July 18, 2019  Revised:July 18, 2019
DOI：10.12136/j.issn.1000-890X.2020.10.0763
Key Words: ammonia free natural rubber latex；coagulant；stabilizer；film；film molding performance
Author NameAffiliationE-mail
GUO Ping* Zhuzhou Rubber Research & Design Institute Co.，Ltd of ChemChina/Hunan Key Laboratory of Materials and Technology of Near Space Sounding Balloon zzguoping@163.com 
YAN Dingxin Zhuzhou Rubber Research & Design Institute Co.，Ltd of ChemChina/Hunan Key Laboratory of Materials and Technology of Near Space Sounding Balloon  
LI Jing Zhuzhou Rubber Research & Design Institute Co. ，Ltd of ChemChina/Hunan Key Laboratory of Materials and Technology of Near Space Sounding Balloon  
ZOU Bin Zhuzhou Rubber Research & Design Institute Co. ，Ltd of ChemChina/Hunan Key Laboratory of Materials and Technology of Near Space Sounding Balloon  
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Abstract:
      In order to solve the problem of the film sliding of ammonia free natural rubber latex from mould during molding（shorted for the film sliding），the effect of the coagulant and stabilizer on the filmmolding performance of ammonia free natural rubber latex was studied by taking balloon as an example.The results showed that，the type and amount of divalent calcium salt and co-forming agent in the coagulant were not the main factors influencing the film sliding. During the molding process of the film with a large wall thickness，ammonia and potassium hydroxide in the compounding latex had the effect of expanding and thickening the coagulant impregnated on the mould，which was beneficial to prevent molding film sliding，and the role of ammonia was more outstanding. In the molding process，ammonia free natural rubber latex lacked the effect of expanding and thickening under natural conditions since there was no ammonia and potassium hydroxide in the stabilizer，and the adhesion between the film and mould could not get increased with the proceeding of latex molding. The main reason for the film sliding was the low adhesion between the film and mould.
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