| 摘要 |
Bag comprises polysilicon, which is welded, and at least one weld made of a polyethylene film which exhibits: a thickness of 150-900 mu m; a stiffness in bending modulus of 300-2000 mN and 100-1300 mN; a damage force of 200-1500 N determined by dynamic penetration test; a fracture energy of 2-30 J; a puncture resistance of 2.2-30 J; a film tensile stress at 15% elongation along and across of 9-50 MPA; a foil Elmendorf tear resistance of 10-60 cN, and 18-60 cN; a film elongation at break (longitudinally) of 300-2000%; and a film elongation at break (transversely) 450-3000%. Bag comprises polysilicon, which is welded, and at least one weld made of a polyethylene film which exhibits: a thickness of 150-900 mu m; a stiffness in bending modulus of 300-2000 mN and 100-1300 mN; a damage force of 200-1500 N determined by dynamic penetration test; a fracture energy of 2-30 J; a puncture resistance of 2.2-30 J; a film tensile stress at 15% elongation along and across of 9-50 MPA; a foil Elmendorf tear resistance of 10-60 cN, and 18-60 cN; a film elongation at break (longitudinally) of 300-2000%; a film elongation at break (transversely) 450-3000%; and a weld line strength of 25-150 N/15 mm. An independent claim is also included for packaging polysilicon in a plastic bag, comprising filling the bag with polysilicon and welding the bag, where the welding is carried out by impulse sealing. A contact pressure through sealing jaws is greater than 0.01 N/mm 2> and a weld seam with a weld line strength of 25-150 N/15 mm is obtained. |
