Packaging bag made of resin

Abstract

A packaging bag made of resin includes a bag-shaped film made of resin and an easy-fracture part. The bag-shaped film made of resin is a laminate film made of a front layer having an adhesive layer and a resin laminated thereon. The easy-fracture part is formed near an outer circumferential end of the bag-shaped film made of resin. On the surface layer, a non-adhesive part is formed toward a site of fracture from the easy-fracture part. Thus, the surface layer can be easily peeled off from this non-adhesive layer.

1 . A packaging bag made of resin comprising:
 a bag-shaped film made of resin which is a laminate film made of a front layer having an adhesive layer and a resin laminated thereon; and   an easy-fracture part formed near an outer circumferential end of said bag-shaped film made of resin,   wherein, on said surface layer, a non-adhesive part is formed toward a site of fracture from said easy-fracture part, whereby said surface layer can be easily peeled off from this non-adhesive layer.   
   
   
       2 . The packaging bag made of resin according to  claim 1 , wherein
 a planar shape thereof is generally rectangular;   peripheries of two long sides are sealed, and a rafter part is formed that is sealed from a generally central part of the two long sides in a direction intersecting the long sides; and   said easy-fracture part is formed at the peripheries of the long sides near the end part.   
   
   
       3 . The packaging bag made of resin according to  claim 2 , wherein the non-adhesive layer is provided on a side of said rafter part where said easy-fracture part is not formed, whereby the front layer of said rafter part can be peeled off with use of hands. 
   
   
       4 . The packaging bag made of resin according to  claim 1 , wherein
 a planar shape thereof is rectangular; and   three sides thereof are sealed to form sealed peripheries, and only one of the short sides forms an opening part, and said easy-fracture part is formed near this opening part.   
   
   
       5 . The packaging bag made of resin according to  claim 1 , wherein said adhesive is an adhesive that does not give adverse effects in terms of hygiene, and is applied to bond between said films. 
   
   
       6 . The packaging bag made of resin according to  claim 5 , wherein said adhesive is selected from the group consisting of various polysaccharides derived from natural products such as various cereal starches and galactomannan, proteins such as corn protein, albumin, and gelatin, natural gummy substances, shellac, glycerin, and mixtures obtained by blending these. 
   
   
       7 . A packaging bag comprising:
 a flexible bag-shaped film made of resin having a front layer and a back layer for storing an object in the bag-shaped film between the front layer and the back layer,   wherein said front layer is a laminate film comprised of a front outer layer, a front inner layer, and an adhesive applied on the front outer layer between the front outer layer and the front inner layer; said adhesive being such that the front outer layer is peelable from the front inner layer and re-adherable to a film,   wherein the bag-shaped film has an easy-fracture part formed near or at one outer periphery of the bag-shaped film for opening the bag-shaped film,   wherein the front outer layer has a non-adhesive part where the adhesive formed on the front outer layer is discontinued, said non-adhesive part being formed along the eary-fracture part and/or a rafter part of the bag-shaped film if any,   wherein the front outer layer can be peeled from the non-adhesive area after the easy-fracture part is opened, the remaining front inner layer and the corresponding back layer can be folded by placing the back layer front, and the front outer layer can re-adhere to the folded back layer.   
   
   
       8 . The packaging bag according to  claim 7 , wherein
 the bag-shaped film has a planar shape which is generally rectangular and has two long sides and two short sides,   peripheries of the two long sides are sealed,   a rafter part is formed that is sealed at a generally central part of each of the long sides in a direction intersecting the long sides, and   the easy-fracture part is formed at or near one of peripheries of the short sides.   
   
   
       9 . The packaging bag according to  claim 8 , wherein the non-adhesive part is provided on the rafter part, whereby the front outer layer at the rafter part can be peeled off with use of hands. 
   
   
       10 . The packaging bag according to  claim 7 , wherein
 the bag-shaped film has a planar shape which is rectangular and has three sides sealed to form sealed peripheries and one side provided with the easy-fracture part.   
   
   
       11 . The packaging bag according to  claim 7 , wherein the adhesive is an adhesive that does not give adverse effects in terms of hygiene. 
   
   
       12 . The packaging bag according to  claim 11 , wherein the adhesive is selected from the group consisting of polysaccharides derived from natural products including cereal starches and galactomannan; proteins including corn protein, albumin, and gelatin; natural gummy substances; shellac; glycerin; and mixtures of any of the foregoing.