| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyethylene bag which is excellent in a constant direction tearable property and can be easily and linearly cut by hand only in one direction. SOLUTION: A resin composition which comprises high-density polyethylene of 40-60 pts.wt. and linear low-density polyethylene of 40-60 pts.wt. is made to be a cylindrical film by inflation molding. After applying uniaxial drawing to the obtained cylindrical film in a drawing direction of the film, a heat seal process and a cutting process are applied thereto in a vertical direction with respect to the drawing direction, and a bottom part and a bag mouth part are formed. An opening cutting or a chevron notch is provided in the bottom part and/or the bag mouth toward the drawing direction of the cylindrical film. |
