JPS61242781A - Half-cut processing method for packaging material - Google Patents

Abstract

PURPOSE:To make possible the half cutting of a long-sized material having a plastic layer and metallic layer in the direction crossing the flow direction of said material by irradiating a laser to said direction during the transfer of the long-sized material. CONSTITUTION:The long-sized packaging material 1 is constituted, from the surface, of a polyester film 11, metallic layer 12 consisting of metallic foil, etc. and sealing layer 13. The material 1 is drawn out of the coil and is subjected to the irradiation and scanning of a laser beam into a spot or wire shape by a laser beam irradiating device 4, by which the film 11 is cut in the direction perpendicular to the flow direction. A half-cut line 2 is easily formed to the material 1 in the direction crossing the flow by the above-mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for half-cutting long packaging materials.

<Prior Art> A method of half-cutting the opening of a box or the like to facilitate opening of the box is already well known.

However, if this is a bag, the material from which it is constructed is extremely thin, making it difficult to cut it into half.

For example, when bonding a long glass film such as polyester to another film, it is possible to cut the plastic film with a razor or the like immediately before bonding and then bond the film as is.

However, in this case, the VC, cut, and half cuts can only be carried out in the direction of flow of the polyester film, that is, in the transport direction, and cannot be carried out in the direction crossing this direction. For this reason, it is not possible to form a bag by rolling up the pasted sheets and gluing the ends together to form a cylindrical bag. Even when a bag is formed, this half-cut line is located at a position different from the opening line of a normal bag.

FIG. 4 of the drawings is an explanatory diagram for explaining this situation, in which (1) shows the packaging material, (2) shows the half cut, and (3) shows the obtained bag. As can be seen from this bag (3), the half-cut line (2) cannot be said to be advantageous in opening the bag (3). This was done in view of the circumstances,
It is an object of the present invention to provide a processing method capable of half-cutting a long packaging material in a direction crossing the flow direction thereof.

<Means for Solving the Problems> In order to achieve this object, the present invention provides a method for transporting a long packaging material having a plastic layer and a metal layer in this order from the surface, while transporting a long packaging material in a direction crossing the flow direction. Provided is a method for half-cutting a packaging material, characterized in that only the plastic layer is cut by irradiating a linear or dotted laser beam onto the plastic layer.

In this method, the laser beam irradiation is instantaneous, so even if the packaging material is long, it is possible to cut it in half in the direction crossing the flow direction. The rays cut the plastic layer on the surface and are reflected by the metal layer without cutting the metal layer or other layers provided below, resulting in a ℃-no-cut.

<Example> The packaging material according to the present invention, for example, as shown in FIG.
A laminated film consisting of a polyester film I, a metal foil or metal vapor deposited layer α2, and a sealing layer C13) can be used. The sealing layer may be made of, for example, unstretched polypropylene, polyethylene, or the like.

This long packaging material (1) is pulled out from the roll as shown in Figure 2, and the laser beam irradiation device (4) irradiates and scans the laser beam in a dotted manner in a direction perpendicular to the flow direction of the packaging material. Cut the polyester film αυ. After this, bags can be made according to conventional methods.

An example of a bag filled with contents and made into a bag is shown in Figure 3 (at(b)
Show lK. (2) is a half-cut line. This bag has a half-cut line (2
) can be easily opened.

<Effects of the Invention> As described above, the present invention has the effect that a long packaging material K can be cut in half in a direction perpendicular to its flow direction.

[Brief explanation of the drawing]

Figure 1 of the drawings is a sectional view of a packaging material for explaining the present invention in detail, Figure 2 is an explanatory diagram for explaining the present invention in detail when a long packaging material is used, and Figure 3 (at (b11 An explanatory diagram illustrating a bag using a packaging material processed by the method of the present invention, FIG. 4 is an explanatory diagram illustrating a conventional method. (1)...Packaging material qυ...Polyester 0 Ri...Metal foil or metal vapor deposited layer a...Cool layer (2)...Bar 7 cut wire (3)...Bag

Claims (1)

[Claims] 1) While transporting a long packaging material having a plastic layer and a metal layer in this order from the surface, irradiate a linear or dotted laser in a direction crossing the flow direction to cut only the plastic layer. A method for half-cutting packaging materials, characterized by: