公开(公告)号：US20190217522A1

公开(公告)日：2019-07-18

申请号：US16317690

申请日：2017-07-25

申请人： DOW GLOBAL TECHNOLOGIES LLC

发明人： Jesus NIETO ,  Shaun PARKINSON ,  David MUÑOZ

IPC分类号： B29C48/92 ,  B29C48/08 ,  G01N3/08 ,  B29C48/88 ,  B29C48/465 ,  B29C48/31

CPC分类号： B29C48/92 ,  B29C48/08 ,  B29C48/21 ,  B29C48/30 ,  B29C48/307 ,  B29C48/313 ,  B29C48/425 ,  B29C48/465 ,  B29C48/475 ,  B29C48/914 ,  B29C2948/92028 ,  B29C2948/92266 ,  B29C2948/92438 ,  B29C2948/92514 ,  B29C2948/9259 ,  B29C2948/92704 ,  B29C2948/92857 ,  B29K2023/0625 ,  B29K2023/0633 ,  G01N3/08 ,  G01N2203/0003 ,  G01N2203/0017 ,  G01N2203/0037 ,  G01N2203/0248 ,  G01N2203/0252 ,  G01N2203/0254 ,  G01N2203/0282

摘要： The present disclosure includes a method for determining a melt strength includes extruding one or more polymers to form the polymer film, passing the polymer film at least partially around a measurement roll coupled to a force measuring device, at least partially around a chill roll downstream of the measurement roll, and through a nip defined between two nip rolls, and measuring a force exerted on the measurement roll by the polymer film using the force measuring device. The polymer film is at least partially molten when contacting the measurement roll. A system includes an extruder, a measurement roll couple to one or more load cells, a chill roll coupled to a drive motor, at least two nip rolls downstream of the chill roll, and a take-up roll downstream of the nip rolls. The load cells measure a force exerted by the molten polymer film on the measurement roll.