摘要:
Tensile strength in a width direction and a longitudinal direction is improved without damaging a ventilation characteristic. A perforated film 1 is a perforated film provided with holes 11, each of the holes 11 is arranged at an intersection of a plurality of virtual lines VL1 extending along a direction D1 and a plurality of virtual lines VL2 extending along a direction D2, and the direction D1 is different from the width direction and the longitudinal direction. The direction D1 and the direction D2 may be both inclined at an angle larger than 30° and smaller than 60° to the width direction.
摘要:
Tensile strength in a width direction and a longitudinal direction is improved without damaging a ventilation characteristic. A perforated film 1 is a perforated film provided with holes 11, each of the holes 11 is arranged at an intersection of a plurality of virtual lines VL1 extending along a direction D1 and a plurality of virtual lines VL2 extending along a direction D2, and the direction D1 is different from the width direction and the longitudinal direction. The direction D1 and the direction D2 may be both inclined at an angle larger than 30° and smaller than 60° to the width direction.
摘要:
In order to provide a check valve capable of sufficiently suppressing the mixing of air into the container even if a certain impact is applied to the container and also capable of stably maintaining good pouring of the content, a check valve 10 of the invention is formed of rubber material and manufactured by integral molding. The check valve 10 has a tubular main body 1 having openings 1 a and 1 b at opposite ends, a lid 3 arranged to close one opening 1a of the main body 1, and a hinge 5 that connects the main body 1 and the lid 3. The lid 3 has a projection 3a on the side surface 3b, the projection 3a coming in contact with a peripheral edge of the opening 1 a of the main body 1.
摘要:
An object of the present invention is to provide a packaging bag capable of being realized only by a rather simple processing and opened easily by hand without deteriorating the sealing strength of the packaging bag and the strength of the packaging bag itself and without suffering from the possibility of peeling-off of the sealed portion during a distribution stage. The present invention relates to a packaging bag formed by adhering two sheets of front and rear side films mutually at peripheral parts to seal an inside thereof, wherein the front side film has, in one direction, linearly cuttable property that is larger than linearly cuttable property in any direction of the rear side film, and a processed portion capable of starting cutting of the front side film along the one direction is provided at a part of the peripheral parts that intersects with the one direction.