15620
A high density polyethylene ( HDPE ) / calcium carbonate ( CaCO ( 3 ) ) film containing TiO ( 2 ) was prepared via blown film extrusion process .
 Chemical: polyethylene; Chemical: calcium carbonate; Chemical: CaCO ( 3 ); Chemical: TiO ( 2 )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: polyethylene; Chemical: calcium carbonate; Chemical: CaCO ( 3 ); Chemical: TiO ( 2 )