JP2017217902A5 - - Google Patents

Claims (11)

An outer layer made of a uniaxially stretched polypropylene film,
In any order, a barrier layer and a resin intermediate layer,
A sealant layer,
A laminated film having in this order,
The sealant layer has the following conditions (1) to (3):
(1) the Young's modulus in the laminated film MD direction is 200 MPa or more;
(2) the thickness is 2.5 times or less the thickness of the outer layer, and (3) the tear strength in the laminated film MD direction is 1 N or more and 5 N or less.
The laminated film characterized by satisfying all of the following.   The laminated film according to claim 1, wherein the sealant layer is a linear low-density polyethylene film. The laminated film according to claim 1 or 2, wherein the tear strength of the sealant layer in the laminated film MD direction is 1N or more and 3N or less.   The laminated film according to any one of claims 1 to 3, wherein the tear strength of the sealant layer in the laminated film TD direction is at least 2.5 times the tear strength of the sealant layer in the laminated film MD direction.   The barrier layer and the resin intermediate layer are made of polyvinylidene chloride / biaxially stretched nylon, polyvinylidene chloride / biaxially stretched polyethylene terephthalate, aluminum deposited / polyethylene terephthalate, aluminum deposited / biaxially stretched nylon, silica deposited / biaxially stretched polyethylene It is composed of terephthalate, silica-deposited / biaxially-stretched nylon, polyvinyl alcohol / biaxially-stretched polypropylene, polycarboxylic acid-based polymer / biaxially-stretched nylon, metaxylenediamine-nylon composite film, and ethylene-vinyl alcohol copolymer-nylon composite film. The laminated film according to any one of claims 1 to 4, which is a laminated material selected from a group. A packaging bag formed by sealing the sealant layers of the laminated film according to any one of claims 1 to 5 to form a bag. The packaging bag according to claim 6 , wherein the seal is an ultrasonic foreign substance seal. A bag-making method comprising a step of ultrasonically sealing the sealant layers of the laminated film according to any one of claims 1 to 5 . The ultrasonic sealing step is a foreign substance sealing step using ultrasonic waves,
The bag making method according to claim 8 .   A filled packaging bag comprising the packaging bag according to claim 6 or 7 and contents filled in the packaging bag.   The filled packaging bag according to claim 10, wherein the content is a high-viscosity food.