Text this: Effect of die geometry on foaming behaviors of high-melt-strength polypropylene with CO<inf>2</inf>

  _  _      ___    __    __   _    _     _____   
 | \| ||   / _ \\  \ \\ / // | || | ||  / ____|| 
 |  ' ||  | / \ ||  \ \/ //  | || | || / //---`' 
 | .  ||  | \_/ ||   \  //   | \\_/ || \ \\___   
 |_|\_||   \___//     \//     \____//   \_____|| 
 `-` -`    `---`       `       `---`     `----`