zhejiang Ventura Photovoltaic Materials Co.,Ltd.was estiblished in 2003 withits factory in shengzhou,Zhejinag province,and started to manufacture solar backsheet since 2006,now the company has five coating production line and one lamination production line which can produce 50 million sqm backsheet per year. The modules that have used ventura company’s backsheet since 2006,are opearting very well without any complaint from ender users.