Nonwoven fabric bag with handles

Abstract

A nonwoven fabric bag includes: a bag body; and a pair of handles. A fabric sheet is folded in two. A bottom of the bag is formed by a sheet portion including the fold line. Side edges of the opposing folded halves of the sheet are bonded together on right and left sides to form a bag. A sheet portion along a peripheral edge of an opening of the bag is folded inward and bonded to form a double-layer portion, thereby forming the bag body. Two strips are attached to the double-layer portion, thereby forming the pair of handles. The side edges are bonded by impulse heat sealing. The peripheral edge of the opening and a vicinity thereof, and a part connecting to the fold line are sewn. The double-layer portion is bonded by discontinuous ultrasonic sealing. Attachment portions between the double-layer portion and the handles are sewn.

1 . A nonwoven fabric bag with handles, comprising:
 a bag body; and   a pair of handles, wherein   a nonwoven fabric sheet having a generally line-symmetrical shape is folded in two along a line of symmetry,   a bottom of the bag is formed by a sheet portion including the fold line,   side edges of the opposing folded halves of the nonwoven fabric sheet are bonded together on both right and left sides to form a bag,   a sheet portion along a peripheral edge of an opening of the bag is folded inward and bonded to form a double-layer portion, thereby forming the bag body, and   two strips, each sewn to have a double-layer structure, are attached to the double-layer portion, thereby forming the pair of handles,   the side edges are bonded by impulse heat sealing,   of the heat seal portion, the peripheral edge of the opening and a vicinity thereof, and a part connecting to the fold line are sewn,   the double-layer portion is bonded by discontinuous ultrasonic sealing, and   attachment portions between the double-layer portion and the handles are sewn.   
     
     
         2 . The nonwoven fabric bag with handles according to  claim 1 , wherein
 the bag body and the pair of handles are made of polypropylene nonwoven fabric, and a thread used in the parts sewn to have the double-layer structure and in the sewn parts is a polyester spun or polypropylene thread.   
     
     
         3 . The nonwoven fabric bag with handles according to  claim 2 , wherein
 the bonded portion by the impulse heat sealing is formed by sandwiching two polypropylene nonwoven fabric sheets, placed on top of each other, between a pair of cylindrical heaters from both sides in a vertical direction, and heating the polypropylene nonwoven fabric sheets, and in the heating process, a portion sandwiched by the pair of cylindrical heaters and thermally fused is pushed toward both right and left sides of the heaters so as to form a thick thermally welded portion.   
     
     
         4 . The nonwoven fabric bag with handles according to  claim 1 , wherein
 the bonded portion by the impulse heat sealing is formed by sandwiching two nonwoven fabric sheets, placed on top of each other, between a pair of cylindrical heaters having a diameter of 0.5 to 1.5 mm from both sides in a vertical direction, and heating the nonwoven fabric sheets.   
     
     
         5 . The nonwoven fabric bag with handles according to  claim 4 , wherein
 the heating by supplying power to the pair of cylindrical heaters is performed at an instantaneous current of 40 to 50 A and an instantaneous voltage of 180 to 260 V, and for heating time of 3 to 5 seconds.   
     
     
         6 . The nonwoven fabric bag with handles according to  claim 2 , wherein
 the bonded portion by the impulse heat sealing is formed by sandwiching two nonwoven fabric sheets, placed on top of each other, between a pair of cylindrical heaters having a diameter of 0.5 to 1.5 mm from both sides in a vertical direction, and heating the nonwoven fabric sheets.   
     
     
         7 . The nonwoven fabric bag with handles according to  claim 3 , wherein
 the bonded portion by the impulse heat sealing is formed by sandwiching two nonwoven fabric sheets, placed on top of each other, between a pair of cylindrical heaters having a diameter of 0.5 to 1.5 mm from both sides in a vertical direction, and heating the nonwoven fabric sheets.   
     
     
         8 . The nonwoven fabric bag with handles according to  claim 6 , wherein the heating by supplying power to the pair of cylindrical heaters is performed at an instantaneous current of 40 to 50 A and an instantaneous voltage of 180 to 260 V, and for heating time of 3 to 5 seconds. 
     
     
         9 . The nonwoven fabric bag with handles according to  claim 7 , wherein the heating by supplying power to the pair of cylindrical heaters is performed at an instantaneous current of 40 to 50 A and an instantaneous voltage of 180 to 260 V, and for heating time of 3 to 5 seconds.