Penelitian pengaruh variasi china clay dan naphthenic oil terhadap perpanjangan tetap dan tegangan putus kompon karet untuk lis pintu almari es

The aim of this research is to know the influence of filer china clay naphthenic oil to the physical properties of permanent set and tensile strength rubber compound for refrigerator gasket. It makes from natural rubber ( pale crepe ) and synthetic rubber (SBR 1502 ) as raw material with addition of ingredients such as : softener, activator, filler, antioxidant, accelerator, coloring and vulcanizing agent. It should be carried out using base formula by varying china clay : 30; 40 ; and 50 parts and naphthenic oil : 5,0 ; 7,5 and 10 parts for 9 compound then should be tested their physical properties permanent set and tensile strength. The result of the test statistically prove that china clay and naphthenic oil influence the physical properties for permanent set by china clay 30 parts and naphthenic oil 5 parts, the value 1,24%, for tensile strength by china clay 50 parts and naphthenic oil 5 parts, the value 102,6081 Kg/Cm2.