JP2022064586A - Easily-tearable aluminum vapor deposition film and manufacturing method thereof, and packaging film - Google Patents

Abstract

To provide an easily-tearable aluminum vapor deposition film which can be suitably used for a packaging film that can be torn from any position thereof while perfectly blocking permeation of oxygen, moisture and so on, and comprises a printing layer, and a manufacturing method thereof, and a packaging film using an easily-tearable aluminum vapor deposition film.SOLUTION: An easily-tearable aluminum vapor deposition film has: a plastic film with many non-penetrating holes that are randomly formed in the whole area on one side by pressing high-hardness fine particles with sharp corners, and have various depths and sizes; and an aluminum vapor deposition layer in which aluminum ort aluminum alloy is vapor-deposited on a surface on a side with the non-penetrating holes of the plastic film and inner surfaces of the non-penetrating holes.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fragile aluminum vapor-deposited film, a method for producing the same, and a packaging film using the fragile aluminum-deposited film.

Dried foods such as instant coffee, powdered milk, and tea are wrapped in a packaging film having a good sealing property to prevent oxygen and moisture. As shown in FIG. 16, for example, the packaging film 300 includes a polyethylene terephthalate (PET) film 301 for ensuring strength, a printing layer 302, an aluminum vapor deposition layer 303, and a heat seal layer 304. As shown in FIG. 17, the wrapping film bag 310 is often formed with a notch 311 for initiating tearing.

However, due to the aluminum vapor deposition layer, heat seal layer and printing layer provided on the PET film, it is often not easy to tear the aluminum vapor deposition film even if there is a notch 311. In particular, since the heat-sealed portion 312 is twice as thick, tearing from the notch provided on the outside of the heat-sealed portion 312 is often stopped by the heat-sealed portion.

Japanese Patent Application Laid-Open No. 7-165256 (Patent Document 1) is made of polyester, nylon or oriented polypropylene in which through holes or non-through holes having an average opening diameter of 0.5 to 100 μm are formed on the entire surface at a density of 1000 pieces / cm ² or more. Disclosed is an easily splitable plastic film in which a heat-sealing polymer film is laminated on one side of the porous film. However, since this easily splitable plastic film may have through holes, there is a problem that it cannot be used in applications where the permeation of oxygen and moisture must be completely blocked.

As a plastic film having non-penetrating holes, Japanese Patent Application Laid-Open No. 10-193454 (Patent Document 2) describes either the inner surface or the outer surface of a tubular film having a thickness of 5 to 150 μm and made of a polyolefin-based resin composition containing an inorganic filler. Disclosed is a functional polyolefin-based tubular film in which one or both of them are subjected to a corona discharge treatment and at least a part of the tubular film is embossed. The embossing depth (measured according to JIS B0601) is 1/2 to 1/10 of the film thickness, and the size of the embossed pattern is usually 0.5 to 300 mm. However, this embossing is too large to spoil the appearance of the plastic film. Also, in order to form fine embossing, it is necessary to produce an embossed roll having a large number of fine protrusions, but such an embossed roll is very expensive, so that the embossed film formed must be expensive. Do not get.

In view of the above circumstances, the present inventor first referred to Japanese Patent Application Laid-Open No. 2018-118781 (Patent Document 3), as shown in FIG. 18, by pressing one of the plastic films 400 by pressing high-hardness fine particles having sharp corners. It has a large number of non-penetrating holes 200a of various depths and sizes randomly formed on the entire surface of the side, and the non-penetrating holes 200a have an average depth corresponding to 40 to 80% of the thickness of the plastic film 400. A fragile plastic film having a maximum depth corresponding to 90% or less, an average hole diameter of the non-through hole 200a of 20 to 100 μm, and a distribution density of the non-through hole 200a of 500 to 40,000 pieces / cm ² . We are proposing 401.

In Patent Document 3, as shown in FIG. 19, a laminate in which a print layer 302, a gas barrier layer 303, and a heat seal layer 304 are formed on the back surface (the side where the non-penetrating hole 200a is not formed) of the easily splitable plastic film 401. Although the film is disclosed, since the easily splitable plastic film 401 having a large number of non-penetrating holes 200a is arranged on the outer surface of the print layer 302, the visibility of the printed matter may be deteriorated. The gas barrier layer 303 is preferably an aluminum-deposited layer from the viewpoint of gas barrier properties and thinning, but since the gas barrier layer 303 is provided on the printed layer 302, the printed layer 302 may be deteriorated by the aluminum vapor deposition.

Japanese Unexamined Patent Publication No. 7-165256 Japanese Unexamined Patent Publication No. 10-193454 Japanese Unexamined Patent Publication No. 2018-118781

Therefore, an object of the present invention is a fragile aluminum vapor-deposited film that can be easily torn from any place while completely blocking the permeation of oxygen, moisture, etc., and can be suitably used for a packaging film provided with a printing layer. And a method for producing the same, and a packaging film using a fragile aluminum vapor-deposited film.

As a result of diligent research in view of the above object, the present inventor has formed a large number of unpenetrated holes having various depths and sizes randomly formed on the entire surface of one side by pressing high-hardness fine particles having sharp corners. By providing an aluminum-deposited layer on the surface of the plastic film having the non-penetrating hole and the inner surface of the non-penetrating hole, it is possible to easily tear the film from any place while completely blocking the permeation of oxygen, moisture, etc. The present invention was devised by discovering that an easily splitable aluminum vapor-deposited film that can be formed and that can be suitably used for a packaging film provided with a printing layer can be obtained.

That is, the easy-to-split aluminum-deposited film of the present invention has a large number of non-penetrating holes having various depths and sizes randomly formed on the entire surface of one side by pressing high-hardness fine particles having sharp corners. With plastic film,
It is characterized by having an aluminum vapor deposition layer formed by depositing aluminum or an aluminum alloy on the surface of the plastic film having the non-penetrating hole and the inner side surface of the non-penetrating hole.

It is preferable that the non-penetrating holes have an average depth corresponding to 40 to 80% of the thickness of the plastic film and a maximum depth corresponding to 90% or less.

It is preferable that the average hole diameter of the non-penetrating holes is 15 to 40 μm, and the distribution density of the non-penetrating holes on the surface of the plastic film having the non-penetrating holes is 10,000 to 50,000 pieces / cm ² .

It is more preferable that the distribution density of the non-penetrating holes in an arbitrary region of 1 cm × 1 cm on the surface of the plastic film having the non-penetrating holes is 10,000 to 50,000 pieces / cm ² .

The thickness of the plastic film is preferably 9 to 25 μm.

The average thickness of the aluminum-deposited layer is preferably 40 to 100 nm.

The pore size distribution of the non-penetrating holes is preferably in the range of 10 to 60 μm.

The distance between each non-penetrating hole and the nearest adjacent non-penetrating hole is preferably 30 μm or less.

It is preferable that the plastic film is a polyethylene terephthalate film.

The packaging film of the present invention includes the above-mentioned easily splitable aluminum vapor-deposited film and
A printing layer formed on the surface of the easily split aluminum vapor-deposited film on the side where the non-penetrating holes are not formed, and
It is characterized by having a heat seal layer formed on the surface of the easily split aluminum vapor-deposited film on the side on which the non-penetrating holes are formed.

The method of the present invention for producing the above-mentioned easily splitable aluminum vapor-deposited film is
A plastic film is passed through a gap between a pattern roll having a large number of high-hardness fine particles having sharp corners randomly on the surface of the roll body and a metal roll, and the high-hardness fine particles make a large number of unpenetrated holes in the plastic film. Form and
It is characterized in that aluminum or an aluminum alloy is vapor-deposited on the surface of the plastic film having the non-penetrating hole and the inner surface of the non-penetrating hole to form an aluminum vapor-deposited layer.

It is preferable that the average particle size of the high-hardness fine particles on the roll surface is 15 to 40 μm, and the distribution density of the high-hardness fine particles on the roll surface of the pattern roll is 10,000 to 50,000 pieces / cm ² .

It is preferable that the distribution density of the high-hardness fine particles in an arbitrary region of 1 cm × 1 cm on the roll surface of the pattern roll is 10,000 to 50,000 pieces / cm ² .

The particle size distribution of the high-hardness fine particles of the pattern roll is preferably in the range of 10 to 60 μm.

The distance between the high-hardness fine particles of the pattern roll and the adjacent closest high-hardness fine particles is preferably 30 μm or less.

The easy-to-split aluminum-deposited film of the present invention is a plastic film having a large number of non-penetrating holes having various depths and sizes randomly formed on the entire surface of one side by pressing high-hardness fine particles having sharp corners. By providing an aluminum-deposited layer on the side having the non-penetrating hole and the inner side surface of the non-penetrating hole, it can be easily torn from any place while completely blocking the permeation of oxygen, moisture, etc. It can be suitably used for a packaging film provided with a printing layer. The easily splitable aluminum vapor-deposited film of the present invention having such characteristics can be widely used for packaging films for dried foods and the like that dislike oxygen, moisture and the like.

It is a partial cross-sectional view which shows the easy-to-break aluminum vapor deposition film of this invention. It is a partial cross-sectional view which shows the packaging film which contains the easy-to-break aluminum vapor deposition film of this invention. It is a perspective view which shows the pattern roll and the metal roll which are relatively inclined. It is a top view which shows the pattern roll and the metal roll which are relatively inclined. It is a front view which shows the main part of the manufacturing apparatus of a perforated plastic film. It is a right side view of the manufacturing apparatus of the perforated plastic film. It is a top view which shows the arc-shaped guide rail fixed to the base. It is a partially omitted plan view which shows the relationship between the arcuate guide rail and a pair of left and right movable frames. It is an exploded side view which shows the structure of the movable frame which is movable along an arc-shaped guide rail. It is a front view which omitted the metal roll and the 2nd drive means from FIG. It is a back view which shows the strain-removing roll provided in the manufacturing apparatus of a perforated plastic film, and the fifth drive means. It is a rear view which shows the state which the strain-removing roll provided in the manufacturing apparatus of a perforated plastic film is inclined in the vertical direction. It is sectional drawing which shows an example of a pattern roll. It is a top view which shows the relationship between the pair of left and right movable frames and a pair of arcuate guide rails when the metal roll is parallel to the pattern roll. It is a top view which shows the relationship between the pair of left and right movable frames and the pair of arcuate guide rails when the metal roll is tilted counterclockwise in the horizontal plane with respect to the pattern roll. It is a top view which shows the relationship between the pair of left and right movable frames and a pair of arcuate guide rails when the metal roll is tilted clockwise in the horizontal plane with respect to the pattern roll. It is sectional drawing which shows the state of piercing a plastic film by the combination of the pattern roll and the metal roll which has a flat roll surface. It is a micrograph which shows the surface of a perforated plastic film. It is a micrograph which shows the surface of a perforated plastic film. It is a partial cross-sectional view which shows an example of the layer structure of a packaging film. It is a front view which shows an example of the bag of a packaging film. It is a partial cross-sectional view which shows an example of a plastic film. It is a partial cross-sectional view which shows an example of the laminated film using the plastic film of FIG.

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but unless otherwise specified, the description of one embodiment also applies to other embodiments. Further, the following description is not limited, and various modifications may be made within the scope of the technical idea of the present invention.

[1] Easy-to-split aluminum vapor-deposited film As shown in FIG. 1, the easy-to-split aluminum vapor-deposited film 1 according to one embodiment of the present invention includes a plastic film 2 having a large number of non-through holes 2a on the entire surface of one side. It has an aluminum vapor deposition layer 3 formed by depositing aluminum or an aluminum alloy on the surface 21 on the side of the plastic film 2 on which the non-penetrating hole 2a is formed and the inner side surface 21a of the non-penetrating hole 2a.

As will be described later, the non-penetrating holes 2a are formed by a large number of high-hardness fine particles having various sizes and heights randomly attached to the surface of the pattern roll, and thus have various sizes and depths. The non-penetrating hole 2a has an average depth of 40 to 80% of the thickness T of the plastic film 2 Dav because it can be easily torn from any place while completely blocking the permeation of oxygen and moisture. And preferably have a maximum depth Dmax corresponding to 90% or less.

When the average depth Dav of the non-penetrating hole 2a is less than 40%, the surface 21 on the side where the non-penetrating hole 2a is formed and the inner side surface 21a of the non-penetrating hole 2a are easily cracked with the aluminum vapor deposition layer 3. It is difficult to impart sufficient tearability to the aluminum-deposited film 1. On the other hand, when the average depth Dav is more than 80%, it is difficult to make all the holes non-penetrating holes. The average depth Dav of the non-penetrating hole 2a is preferably 45 to 65%, more preferably 50 to 70% of the thickness T of the plastic film.

When the maximum depth Dmax of the non-penetrating hole 2a exceeds 90%, it is difficult to make all the holes non-penetrating holes. The maximum depth Dmax of the non-penetrating hole 2a is preferably 85% or less of the thickness T of the plastic film, and more preferably 80% or less.

The average hole diameter Pav of the non-penetrating hole 2a is preferably 15 to 40 μm. If the average pore diameter Pav of the non-penetrating hole 2a is less than 15 μm, sufficient fragility cannot be imparted to the fragile aluminum vapor-deposited film 1. On the other hand, when the average hole diameter Pav of the non-penetrating hole 2a exceeds 40 μm, the strength of the easily split aluminum vapor-deposited film 1 becomes insufficient, and the aluminum-deposited layer 3 formed on the inner surface 21a in the non-penetrating hole 2a. Pinholes are likely to occur. The average hole diameter Pav of the non-penetrating hole 2a is preferably 15 to 30 μm, more preferably 15 to 25 μm.

It is preferable that the depth distribution and the hole diameter distribution of the non-penetrating hole 2a having the average depth Dav, the maximum depth Dmax and the average hole diameter Pav are as narrow as possible. For that purpose, it is preferable to make the particle size distribution of the high-hardness fine particles of the pattern roll described later as narrow as possible. The pore size distribution of the non-penetrating hole 2a is preferably in the range of 10 to 60 μm, more preferably in the range of 10 to 50 μm, and further preferably in the range of 10 to 40 μm.

The distribution density Ds of the non-penetrating holes 2a is preferably 10,000 to 50,000 pieces / cm ² . If the distribution density Ds of the non-penetrating holes 2a is less than 10,000 pieces / cm ² , it is difficult to impart sufficient fragility to the fragile aluminum vapor-deposited film 1. On the other hand, when the distribution density Ds exceeds 50,000 pieces / cm ² , the strength of the easily split aluminum vapor-deposited film 1 becomes insufficient. By forming a large number of unpenetrated holes 2a with an average hole diameter of 15 to 40 μm, which is relatively small, as many as 10,000 to 50,000 / cm ² , it is possible to suppress the occurrence of pinholes in the aluminum-deposited layer 3 and to make excellent cracks. An aluminum vapor-deposited film 1 having a property is obtained. The distribution density Ds of the non-penetrating holes 2a is more preferably 20,000 to 50,000 pieces / cm ² , and further preferably 30,000 to 50,000 pieces / cm ² . When determining the distribution density Ds, it is desirable to count only the non-penetrating holes 2a having a hole diameter of 10 μm or more, because minute non-penetrating holes with a hole diameter of less than 10 μm do not contribute much to the fragility.

It is desirable that the non-through holes 2a are evenly distributed over the entire surface 21 of the plastic film 2 so that it can be easily torn from any location in all directions. That is, the distribution density of the non-through holes 2a is preferably 10,000 to 50,000 pieces / cm ² in an arbitrary region of 1 cm × 1 cm of the surface 21 of the plastic film 2 having the non-through holes 2a, preferably 20,000 to 50,000. Pieces / cm ² are more preferred, and 30,000 to 50,000 pieces / cm ² are even more preferred.

Further, the distance between each non-through hole 2a and the adjacent closest non-through hole 2a is preferably 30 μm or less. When the closest distance between adjacent non-penetrating holes is 30 μm or less, it can be easily torn in all directions. The distance between each non-penetrating hole 2a and the nearest adjacent non-penetrating hole 2a is more preferably 25 μm or less, and even more preferably 20 μm or less.

The plastic forming the plastic film 2 is not particularly limited as long as it has sufficient tensile strength, surface hardness, flexibility, gas barrier property, water resistance and heat resistance, but is not particularly limited, but is limited to polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and the like. Polyesters, polyolefins such as stretched polypropylene (OPP), polyamides such as nylon (Ny), polyvinyl chlorides, polyvinylidene chlorides, polystyrenes and the like, and thermoplastic flexible polymers are preferable. Among them, PET and OPP are preferable, and PET is particularly preferable. In the case of PET film, the thickness T is preferably 9 to 25 μm. If the thickness T of the PET film is less than 9 μm, it does not have sufficient tensile strength. On the other hand, if the thickness T of the PET film exceeds 25 μm, the flexibility is lowered and the PET film is not suitable for packaging films such as dried foods. The thickness T of the PET film is preferably 10 to 20 μm, more preferably 10 to 15 μm.

The average depth Dav of the non-penetrating hole 2a is preferably 4 to 15 μm. When the average depth Dav of the non-penetrating hole 2a is less than 4 μm, it is difficult to impart sufficient fragility to the fragile aluminum vapor-deposited film 1. If the average depth Dav exceeds 15 μm, cracks may occur through the plastic film 2 from the bottom of the non-penetrating hole 2a. The average depth Dav of the non-penetrating hole 2a is preferably 4 to 10 μm, more preferably 4 to 6 μm, of the thickness T of the plastic film.

The aluminum vapor deposition layer 3 is entirely formed on the surface 21 of the plastic film 2 on the side where the non-penetrating hole 2a is formed and the inner side surface 21a of the non-penetrating hole 2a, and completely blocks the permeation of oxygen, moisture, and the like. are doing. It is desirable that the aluminum-deposited layer 3 is formed on the surface 21 of the plastic film 2 and the inner side surface 21a of the non-through hole 2a with a substantially constant film thickness by the vapor deposition method, and the average thickness of the aluminum vapor-deposited layer is 40 to 100 nm. Is preferable. If the average thickness of the aluminum-deposited layer is less than 40 nm, pinholes may occur and the permeation of oxygen, moisture, etc. may be incompletely blocked. On the other hand, if the average thickness of the aluminum-deposited layer exceeds 100 nm, the gas barrier property is hardly changed, which is meaningless from the viewpoint of cost and the fragility is deteriorated. The average thickness of the aluminum-deposited layer is more preferably 50 to 90 nm, more preferably 60 to 80 nm.

The aluminum vapor deposition layer 3 is formed by depositing aluminum or an aluminum alloy. Aluminum preferably has a purity of 99.9% or higher. The aluminum alloy is not particularly limited as long as it is generally used as a vapor deposition material, and examples thereof include alloys containing manganese, copper, silicon, zinc, magnesium, nickel and the like.

[2] Packaging film As shown in FIG. 2, the packaging film 300 for dried foods and the like using the fragile aluminum vapor-deposited film 1 of the present invention is the back surface of the fragile aluminum-deposited film 1 (non-through hole 2a). The print layer 302 is formed on the side (the side on which the aluminum vapor deposition layer 3 is not formed) 22, and the heat seal layer 304 is formed on the surface (the side where the non-penetrating holes 2a and the aluminum vapor deposition layer 3 are formed) 21 of the easy-to-split aluminum vapor-deposited film 1. do. The heat-sealing layer 304 is necessary for sealing the bag made of the fragile aluminum vapor-deposited film 1, and is made of low-density polyethylene (LDPE), unstretched polypropylene (CPP), ethylene-vinyl acetate copolymer (EVA), or the like. Can be formed. The thickness of the heat seal layer 304 may be about 20 to 60 μm.

In the packaging film 300 using the fragile aluminum vapor-deposited film 1 of the present invention, the back surface 22 of the fragile aluminum-deposited film 1 faces the outer surface side, and the back surface 22 of the fragile aluminum-deposited film 1 is above. Since the printed layer 302 is provided on the surface, there is no possibility that the visibility of the printed matter is deteriorated due to the non-through hole 2a. Further, since the heat seal layer 304 is provided on the surface 21 of the easy-to-split aluminum vapor-deposited film 1, deterioration of the print layer due to aluminum vapor deposition can be prevented. Further, when the heat-sealed layer 304 is heat-welded, a part of the softened / semi-melted heat-sealed layer 304 enters the non-penetrating hole 2a, and when cooled in that state, the surface 21 of the easily split aluminum vapor-deposited film 1 And the heat seal layer 304 are improved in adhesion.

A surface protective layer may be further provided on the print layer 302. When the packaging film 300 is a plain bag, the printing layer 302 may be omitted. The easy-to-split aluminum-deposited film of the present invention can be used for various purposes, not limited to the above-mentioned packaging film 300. For example, it can also be used for labels, seals, lid materials and the like.

[2] Method for manufacturing a flammable aluminum vapor-deposited film The method for manufacturing a flammable aluminum vapor-deposited film according to an embodiment of the present invention has a pattern in which a large number of high-hardness fine particles having sharp corners are randomly present on the surface of a roll body. The plastic film 2 is passed through the gap between the roll and the metal roll, and a large number of non-penetrating holes 2a are formed in the plastic film 2 by the high-hardness fine particles. Aluminum or an aluminum alloy is vapor-deposited on the inner side surface 21a of the through hole 2a to form the aluminum vapor-deposited layer 3.

(a) Method for manufacturing a plastic film In the step of forming a large number of non-through holes 2a in the plastic film 2, the manufacturing apparatus described in JP-A-2018-118781 and Japanese Patent No. 6386201 can be used. As shown in FIGS. 3 (a) and 3 (b), when the bent pattern roll 10 and the metal roll 20 are brought into contact with each other with their central axes tilted by a small angle θ, they are slightly curved. The pattern roll 10 and the metal roll 20 are in line contact with each other at equal pressures in a spiral shape, and a large number of non-penetrating holes can be uniformly formed in the width direction even for the wide plastic film 2. An example of the manufacturing apparatus for the plastic film 2 is shown in FIGS. 4 and 5. The plastic film 2 manufacturing apparatus includes a pattern roll 10 and a metal roll 20 having a flat roll surface provided opposite to each other to form a non-through hole 2a in the plastic film 2, and a pair of bearings 11 of the pattern roll 10. , 11-shaped fixed frames 30, 30 and a pair of left and right movable frames 40, 40 supporting a pair of bearings 21, 21 of a metal roll 20, and a movable plate to which each movable frame 40, 40 is fixed. 61, 61, horizontal plates 60, 60 fixed to movable plates 61, 61, first drive means 70 fixed to the upper surface of the base 50 to rotate the horizontal plates 60, 60, and each movable frame. The second drive means 80, 80 for moving the bearings 21, 21 of the metal roll 20 up and down along the 40, 40, the third drive means 90 for rotating the pattern roll 10, and the metal roll 20 are rotated. A fourth driving means 100 for winding the first reel 151 around which the plastic film 2 is wound, and a plastic film (perforated plastic film) 2'forming a large number of non-through holes 2a. The second reel 152 is provided with a plurality of guide rolls and nip rolls for guiding the plastic film 2 and the perforated plastic film 2'. Change the height of the strain removing roll 120 that contacts the perforated plastic film 2'and the bearings 121 and 121 that rotatably support both ends of the strain removing roll 120 downstream of the gap G between the pattern roll 10 and the metal roll 20. A pair of fifth drive means 130 and 130 are arranged.

(1) Fixed part As shown in FIG. 5, the frame structure 110 including the vertical frame 111 and the horizontal frame 112 horizontally fixed to the upper end of the vertical frame 111 is fixed to the base 50, and is paired left and right. A fixed frame 30 is fixed to each of the horizontal frames 112 of the above so as to hang down. As shown in FIG. 4, the bearing 11 of the pattern roll 10 is rotatably fixed to each fixed frame 30, and the pattern roll 10 rotates at a predetermined position without moving up and down with respect to the fixed frame 30. Further, as shown in FIG. 6, a pair of left and right flat plates 51 and 51 are fixed to the upper surface of the base 50, and an arcuate guide rail 52 is fixed to the upper surface of each flat plate 51 with bolts. A flat plate 77 to which the frame 74 supporting the first driving means 70 is fixed is fixed to the central portion of the base 50.

(2) Movable part As is clear from FIGS. 4 and 7, the movable frame 40 is located under each fixed frame 30, and each movable frame 40 is fixed to the upper surface of the movable plate 61. As shown in FIG. 8, a guide block 62 having a guide groove 62a to which the arcuate guide rail 52 is slidably engaged is fixed to the bottom surface of each movable plate 61 with bolts. Both movable plates 61 and 61 are bolted to both ends of the horizontal plate 60.

The first drive means 70 connected to the horizontal plate 60 includes a motor 71, a speed reducer 73 connected to the shaft 72 of the motor 71, a frame 74 supporting the speed reducer 73, and a connector fixed to the shaft 72. Equipped with a plate 75. The frame 74 is fixed to the flat plate 77 on the base 50. Further, the connector plate 75 is fixed to the horizontal plate 60 with bolts 76.

A second driving means 80 is fixed to the bracket 41 of each movable frame 40. Each second drive means 80 was attached to a gear device 81 supported by a bracket 41 fixed to a movable frame 40, a motor 83 connected to the gear device 81 via a speed reducer 82, and a gear device 81. It has a screw jack 84 and a male screw member 85 protruding from the screw jack 84. Each bearing 21 of the metal roll 20 is supported by the male screw member 85 of the screw jack 84 via the elastic means 86. The elastic means 86 includes an elastic member such as a coil spring and a load sensor to prevent an excessive impact from being applied to the bearing 21 of the metal roll 20. As shown in FIGS. 5 and 9, a vertical guide rail 44 on which the guide member 22 on the back surface of the bearing 21 of the metal roll 20 is engaged is provided on the front side surface of each movable frame 40, so that the metal roll 20 is provided with a vertical guide rail 44. Both bearings 21 and 21 can be raised and lowered along the vertical guide rails 44 and 44 of the movable frames 40 and 40.

(3) Pattern roll driving means As shown in FIG. 4, the third driving means 90 for driving the pattern roll 10 includes a motor 91 and a speed reducer 93 connected to the rotating shaft of the motor 91 via a chain 92. A coupling device 94 connected to the rotation shaft of the speed reducer 93 is provided, and the shaft 95 extending from the coupling device 94 is connected to the bearing 11 of the pattern roll 10.

(4) Metal roll driving means As shown in FIG. 4, the fourth driving means 100 for driving the metal roll 20 is fixed to the bracket 42 fixed to the movable frame 40. The fourth drive means 100 includes a motor 101, a speed reducer 103 connected to the rotation shaft of the motor 101 via a chain 102, and a coupling device 104 connected to the rotation shaft of the speed reducer 53, and is coupled. The shaft 105 extending from the device 104 is connected to the bearing 21 of the metal roll 20.

(5) Strain-removing roll Since the perforated plastic film 2'passes through the gap G between the relatively inclined pattern roll 10 and the metal roll 20 and is distorted, if it is wound as it is, problems such as breakage will occur. There is a risk. Therefore, as shown in FIG. 5, it is preferable to provide the strain removing roll 120 at a position immediately downstream of the gap G between the pattern roll 10 and the metal roll 20. As shown in FIG. 10 (a), the bearings 121 and 121 that rotatably support both ends of the strain removing roll 120 are fixed to the pair of fixed frames 30 and 30, respectively, via brackets 31 and 31. It is moved up and down by the driving means 130 and 130. In the illustrated example, each fifth drive means 130 comprises an air cylinder 131 supported by a bracket 31 fixed to a fixed frame 30, and a piston rod 132 of the air cylinder 131, which is universal at the tip of the piston rod 132. A bearing 121 of the strain removing roll 120 is attached via a joint 133. Therefore, as shown in FIG. 10 (b), the heights of both ends of the strain removing roll 120 can be changed by independently driving the fifth driving means 130 and 130. That is, the strain removing roll 120 can be tilted at a desired angle δ with respect to the horizontal axis (parallel to the central axis of the pattern roll 10).

Since the guide roll 140 is located downstream of the strain removing roll 120, the perforated plastic film 2'is left and right by the inclined strain removing roll 120 between the gap G between the pattern roll 10 and the metal roll 20 and the guide roll 140. It receives different tensions and the strain is reduced. For example, when the metal roll 20 is tilted so that the left side of the perforated plastic film 2'in the traveling direction protrudes forward from the right side, a pair of fifths so that the left end portion of the strain removing roll 120 is higher than the right end portion. By adjusting the strokes of the piston rods 132 and 132 of the driving means 130 and 130, the strain is sufficiently removed from the perforated plastic film 2'which is formed by forming non-penetrating holes by the relatively inclined pattern roll 10 and the metal roll 20. Therefore, the risk of breakage, wrinkles, and other problems during the winding process is reduced.

(6) Pattern roll As shown in FIG. 11, the pattern roll 10 is preferably a roll in which a large number of high-hardness fine particles 10c are randomly fixed to the roll surface 10b of the metal roll body 10a by a plating layer 10d such as nickel plating. Specific examples of such a pattern roll 10 are described in, for example, JP-A-5-131557, JP-A-9-57860 and JP-A-2002-59487.

The high hardness fine particles 10c preferably have sharp corners and a Mohs hardness of 5 or more. The high-hardness fine particles 10c having sharp corners are preferably diamond fine particles, and particularly preferably crushed diamond fine particles. The high hardness fine particles 10c preferably have an aspect ratio of 3 or less. Since the aspect ratio is 3 or less, the high hardness fine particles 10c have a polygonal shape close to a sphere. The aspect ratio of the high hardness fine particles 10c is more preferably 2 or less, and most preferably 1.5 or less.

About 1/3 to 2/3 of the high-hardness fine particles 10c are embedded in the plating layer 10d, and the high-hardness fine particles 10c protruding from the surface (roll surface) of the plating layer 10d are 40 of the thickness T of the plastic film 2. It is necessary to have an average height and a maximum height capable of forming an unthrough hole 2a having an average depth Dav corresponding to -80% and a maximum depth Dmax corresponding to 90% or less in the plastic film 2. The average height of the high-hardness fine particles 10c protruding from the roll surface is preferably 40 to 80%, more preferably 45 to 65%, and 50 to 70% of the thickness T of the plastic film 2. Is the most preferable. The maximum height of the high-hardness fine particles 10c protruding from the roll surface is preferably 90% or less, more preferably 85% or less, and most preferably 80% or less of the thickness T of the plastic film 2. The average particle size of the high-hardness fine particles 10c on the roll surface of the pattern roll 10 is preferably 15 to 40 μm, more preferably 15 to 30 μm, and most preferably 15 to 25 μm.

The distribution density of the high-hardness fine particles 10c on the roll surface of the pattern roll 10 is preferably 10,000 to 50,000 pieces / cm ² , more preferably 20,000 to 50,000 pieces / cm ² , and 30,000 to 50,000 pieces / cm ² . Most preferably. When determining the distribution density, it is desirable to count only the high-hardness fine particles 10c having a pore size of 10 μm or more, because fine high-hardness fine particles having a particle size of less than 10 μm do not contribute much to the fragility. It is desirable that the high hardness fine particles 10c are evenly distributed over the entire roll surface of the pattern roll 10. That is, the distribution density of the high-hardness fine particles 10c is preferably 10,000 to 50,000 pieces / cm ² and 20,000 to 50,000 pieces / cm ² in an arbitrary region of 1 cm × 1 cm on the roll surface of the pattern roll 10. More preferably, it is 30,000 to 50,000 pieces / cm ² .

The distance between the high-hardness fine particles 10c on the roll surface of the pattern roll 10 and the adjacent closest high-hardness fine particles 10c is preferably 30 μm or less, more preferably 25 μm or less, and further preferably 20 μm or less. preferable.

The pattern roll 10 having the high-hardness fine particles 10c having the above distribution forms the non-penetrating holes 2a to which the shape of the high-hardness fine particles 10c is transferred in the plastic film 2. In order to obtain a pattern roll 10 having high-hardness fine particles 10c satisfying the above conditions, the high-hardness fine particles 10c are embedded in the plating layer 10d, and then the pattern roll 10 is surface-polished with a grinder or the like, and all the high-hardness fine particles 10c are specified. It is preferable not to exceed the height of.

In order to prevent the pattern roll 10 from bending during the drilling of the plastic film 2, the roll body 10a of the pattern roll 10 is preferably formed of a hard metal. Examples of hard metals include die steels such as SKD11.

(7) Metal roll The metal roll 20 to be combined with the pattern roll 10 needs to have a flat roll surface so that the high hardness fine particles 10c of the pattern roll 10 do not penetrate the plastic film 2. The roll surface is preferably mirror-shaped. Further, in order to exhibit sufficient deformation resistance against a load in the drilling process, the metal roll 20 is formed of a high-strength and hard metal [for example, high-strength corrosion-resistant stainless steel (SUS440C, SUS304, etc.)]. Is preferable. Further, the metal roll 20 may have a two-layer structure consisting of an inner layer of a hard metal such as die steel and an outer layer made of high-strength corrosion-resistant stainless steel such as SUS304. Practically, the thickness of the outer layer may be about 20 to 60 mm.

The high-hardness fine particles 10c enter the plastic film 2 that passes between the pattern roll 10 having a large number of high-hardness fine particles 10c on the roll surface 10a and the metal roll 20 having the flat roll surface 20a. Since the average height and the maximum height of the high-hardness fine particles 10c protruding from the roll surface of the pattern roll 10 are sufficiently smaller than the thickness T of the plastic film 2, the high-hardness fine particles 10c do not penetrate the plastic film 2. Therefore, only the non-through hole 2a is formed in the plastic film 2.

(8) To observe the properties of the perforated plastic film 2'exiting from the gap G downstream of the gap G between the sensor pattern roll 10 and the metal roll 20 (pore diameter distribution and aperture ratio of non-penetrating holes, film wrinkles, etc.). It is preferable to provide the sensor 145. The device of the present invention also comprises a control device (not shown) for inputting a signal of the sensor 145. The control device responds to the output signal of the sensor 145 by the gap between the pattern roll 10 and the metal roll 20 for obtaining the desired perforated plastic film 2', and the horizontal of the center axis of the metal roll 20 with respect to the center axis of the pattern roll 10. A signal for adjusting the direction tilt angle θ and the vertical tilt angle δ of the strain removing roll 120 is generated.

(b) Formation of perforated plastic film The metal roll 20 is in a state parallel to the pattern roll 10 in the descending position (the horizontal inclination angle θ of the central axis of the metal roll 20 with respect to the central axis of the pattern roll 10 is 0 °). At times, while operating the third and fourth drive means 90, 100 for rotating the pattern roll 10 and the metal roll 20, the plastic film 2 rewound from the first reel 151 is transferred to the pattern roll 10 and the metal roll. It is passed through a large gap G with 20 and wound on a second reel 152 through a strain removing roll 120, a guide roll 140, and a plurality of guide rolls and nip rolls.

With the metal roll 20 raised by operating the second drive means 80, 80, the first drive means 70 is operated (rotated) around the point O. When the horizontal plate 60 is rotated left and right by the first driving means 70, the pair of movable plates 61 and 61 slide (rotate) along the arcuate guide rails 52 and 52, so that both of them are attached to the movable frames 40 and 40. The metal roll 20 to which the bearings 21 and 21 are fixed is tilted counterclockwise in the horizontal plane from the state parallel to the pattern roll 10 [Fig. 12 (a)] or clockwise. It can rotate up to the tilted state [Fig. 12 (c)]. As a result, the metal roll 20 is tilted with respect to the pattern roll 10 by an angle θ in the horizontal plane, and the stress applied to the plastic film 2 passing through the gap G between the pattern roll 10 and the metal roll 20 is made uniform in the lateral direction. FIG. 13 shows how the non-penetrating holes 2a are formed in the plastic film 2 by the high hardness fine particles 10c of the pattern roll 10.

Observe the properties of the plastic film 2 (perforated plastic film 2'after the start of drilling) coming out of the gap G with the sensor 145, output the signal of the sensor 145 to the control device (not shown), and use the control device to control the pattern roll 10. A signal for adjusting the horizontal inclination angle θ of the central axis of the metal roll 20 with respect to the central axis and the vertical inclination angle δ of the strain removing roll 120 is generated. In response to these signals, the rotation of the first drive means 70 is controlled to optimize the horizontal inclination angle θ of the center axis of the metal roll 20 with respect to the center axis of the pattern roll 10, and the fifth drive means 130. And optimize the vertical tilt angle δ of the strain removing roll 120. In this state, the plastic film 2 is perforated to form a desired perforated plastic film 2'and wound on a second reel 152.

(c) Formation of aluminum vapor deposition layer Chemical vapor deposition of aluminum or aluminum alloy by vapor deposition method (vacuum vapor deposition method, sputtering method, physical vapor deposition method such as ion plating method, or chemical vapor deposition method such as plasma CVD method, thermal CVD method, optical CVD method, etc. The aluminum vapor deposition layer 3 is formed on the surface 21 of the plastic film 2 and the inner side surface 21a of the non-through hole 2a by vapor deposition (vapor deposition method). From the viewpoint of cost, the vacuum deposition method is preferable.

The vacuum vapor deposition method is generally a semi-continuous method (a method in which film feeding, vapor deposition and winding are performed in a vacuum) or a continuous method (a method in which film feeding and winding are performed in the atmosphere and only vapor deposition is performed in a vacuum). ), The metal is heated and evaporated by a high frequency induction heating method or a resistance heating method (radiation) under a high vacuum of about ^10-2 Pa, and the vapor is condensed on a resin film to form a metal layer.

When the chemical vapor deposition method (CVD method) is used, it is preferable to use the plasma CVD method, which can form a thin film at a low temperature. In the plasma CVD method, high-frequency power is applied between facing electrodes or to a coil to generate plasma of a low-pressure reaction gas to form a metal vapor deposition layer, or a metal vapor deposition layer is formed by high-frequency glow discharge decomposition of the reaction gas under reduced pressure. Is a method of forming. Metal halides, organic metals, organic metal complexes, metal alcoholates, etc. are used as starting materials, and reactive gases such as nitrogen, ammonia, dinitrogen monoxide, oxygen, carbon monoxide, methane, and hydrogen are used as starting materials such as helium and argon. Used with carrier gas.

For example, the aluminum vapor deposition layer uses trimethylaluminum (Al (CH ₃ ) ₃ ) as the raw material gas at a plasma power density of 0.03 to 0.06 W / cm ³ .
Equation (1): 2 Al (CH ₃ ) ₃ + H ₂ → 2 Al (CH ₃ ) ₂ + 2CH ₄・ ・ ・ (1), and Equation (2): Al (CH ₃ ) ₂ + H ₂ → Al + 2CH ₄・ ・ ・ (2)
It can be formed by selectively causing the reaction represented by. Equation (1) represents the reaction that occurs in plasma, and equation (2) represents the reaction that occurs on the film surface.

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

Example 1
Using the equipment shown in FIGS. 4 to 13, the surface of a PET film (thickness 12 μm) having a width of 1000 mm was perforated to prepare the perforated films shown in FIGS. 14 and 15. The inclination angle of the central axis of the metal roll 20 with respect to the central axis of the pattern roll 10 in the horizontal plane was adjusted within the range of 0.415 to 0.83 °. A 50 cm long sample cut from a perforated film was cut into 100 mm lengths in the width direction, and the obtained 10 test pieces PT1 were placed on white paper to obtain a black oil-based marker (black oil-based marker). An area of 5 cm x 1 cm was filled with magic ink). As a result of checking the white paper under each test piece PT1, no oil-based marker was attached. Therefore, it was confirmed that all the formed holes were non-penetrating holes.

The average depth Dav, maximum depth Dmax, and average hole diameter Pav of the non-penetrating holes were measured by micrographs of the cross section of the test piece PT2 obtained in the same manner as above. In addition, the distribution density Ds of the non-penetrating holes was measured by a flat micrograph. The measurement results are shown in Table 1.

注：(1) 未貫通孔の平均深さDav及びプラスチックフィルムの厚さTに対する比率。
(2) 未貫通孔の最大深さDmax及びプラスチックフィルムの厚さTに対する比率。

Note: (1) Ratio of average depth Dav of non-through holes and thickness T of plastic film.
(2) Ratio of maximum depth Dmax of non-through holes and thickness T of plastic film.

An aluminum vapor deposition layer having a thickness of about 80 nm was formed on one surface (surface) of the PET film by a vacuum vapor deposition method to prepare a fragile aluminum vapor deposition film. The oxygen permeation amount and the water vapor permeation amount were measured for the easily splitable aluminum vapor-deposited film of Example 1. The amount of oxygen permeation is a trade name manufactured by JASCO Corporation; under the condition that a sample with a diameter of 10 cm cut out from the laminated film using a gas palm is pressurized to 5 kg / cm ² at an oxygen concentration of 100%, 25 ° C, and 65% RH. Measured at. The amount of water vapor permeation was measured by using a trade name manufactured by Dr. Lyssy of Switzerland; a sample having a diameter of 10 cm cut out from the laminated film using an L80-4000 type under the conditions of 40 ° C. and 90% RH according to JIS K7129A. The oxygen permeation amount is 0.8 cc / m ^2/24 hours, and the water vapor permeation amount is 0.9 cc / m ^2/24 hours. rice field.

A heat-sealed layer (low density polyethylene) having a thickness of 30 μm was adhered to the surface of the obtained easily split aluminum vapor-deposited film of Example 1 via an adhesive layer having a thickness of 10 μm to prepare Sample 1. For sample 1, the fragility was examined by pulling with the fingers of both hands. As a result, a large number of non-penetrating holes in the perforated PET film acted as starting points for tearing, and a large number of non-penetrating holes located in the tearing direction acted as sequential tearing points. Therefore, it can be torn very easily and has excellent straight-line cut performance.

1 ... Easy-to-split aluminum vapor-deposited film
2'・ ・ ・ Perforated plastic film
2 ... Plastic film
2a ・ ・ ・ Unthrough hole
10 ・ ・ ・ Pattern roll
10a ・ ・ ・ Roll body
10b ・ ・ ・ Roll surface
10c ・ ・ ・ High hardness fine particles
10d ・ ・ ・ Plating layer
11 ・ ・ ・ Bearing
20 ・ ・ ・ Metal roll
20a ・ ・ ・ Roll body
21 ・ ・ ・ Bearing
30 ・ ・ ・ Fixed frame
31, 36 ・ ・ ・ Bracket
34 ・ ・ ・ Vertical guide rail
40 ・ ・ ・ Movable frame
41, 42 ・ ・ ・ Bracket
44 ・ ・ ・ Vertical guide rail
50 ... foundation
51 ・ ・ ・ Flat plate
52 ・ ・ ・ Arc-shaped guide rail
60 ・ ・ ・ Horizontal plate
61 ・ ・ ・ Movable plate
62 ・ ・ ・ Guide block
62a ・ ・ ・ Guide groove
70 ... First drive means
71 ・ ・ ・ Motor
72 ・ ・ ・ Motor shaft
73 ・ ・ ・ Reducer
74 ・ ・ ・ Frame
75 ・ ・ ・ Connector plate
76 ・ ・ ・ Bolt
77 ・ ・ ・ Flat plate
80 ... Second drive means
81 ・ ・ ・ Gear device
82 ・ ・ ・ Reducer
83 ・ ・ ・ Motor
84 ・ ・ ・ Screw jack
85 ・ ・ ・ Male screw member
86 ・ ・ ・ Elastic means
90 ... Third drive means
91 ・ ・ ・ Motor
92 ・ ・ ・ Chain
93 ・ ・ ・ Reducer
94 ・ ・ ・ Coupling device
95 ・ ・ ・ Shaft
100 ... Fourth drive means
101 ・ ・ ・ Motor
102 ・ ・ ・ Chain
103 ・ ・ ・ Reducer
104 ・ ・ ・ Coupling device
105 ・ ・ ・ Shaft
110 ・ ・ ・ Frame structure
111 ・ ・ ・ Vertical frame
112 ・ ・ ・ Horizontal frame
113 ・ ・ ・ Second horizontal frame
120 ・ ・ ・ Distortion removal roll
121 ・ ・ ・ Bearing of strain removing roll
130 ・ ・ ・ Fifth drive means
131 ・ ・ ・ Air cylinder
132 ・ ・ ・ Piston rod
133 ・ ・ ・ Universal joint
140 ・ ・ ・ Guide roll
145 ・ ・ ・ Sensor
151 ・ ・ ・ Reel wound with plastic film
152 ・ ・ ・ Reel for winding perforated plastic film
160 ・ ・ ・ Backup roll
161 ・ ・ ・ Bearing
170 ... Sixth drive means
171 ・ ・ ・ Motor
172 ・ ・ ・ Reducer
173 ・ ・ ・ Screw jack
174 ・ ・ ・ Male screw member
175 ・ ・ ・ Elastic means
200 ・ ・ ・ Puncture test equipment
201 ・ ・ ・ Foundation
202 ・ ・ ・ Columnar space of the base
203 ・ ・ ・ O-ring
204 ・ ・ ・ Push plate
205 ・ ・ ・ Piercing rod
300 ・ ・ ・ Packaging film
301 ・ ・ ・ PET film
302 ・ ・ ・ Print layer
303 ・ ・ ・ Aluminum vapor deposition layer
304 ・ ・ ・ Heat seal layer
310 ・ ・ ・ Bag
311 ・ ・ ・ Notch
312 ・ ・ ・ Heat seal part
400 ・ ・ ・ Plastic film
401 ・ ・ ・ Easy-to-split plastic film
200a ・ ・ ・ Not through hole
T ・ ・ ・ Thickness of plastic film
Dav ・ ・ ・ Average depth of non-penetrating holes
Dmax ・ ・ ・ Maximum depth of non-through hole
Pav: Average hole diameter of non-penetrating holes
G: Gap between pattern roll and metal roll
O ・ ・ ・ Rotation center θ of the first drive means θ ・ ・ ・ Horizontal inclination angle of the center axis of the metal roll with respect to the center axis of the pattern roll δ ・ ・ ・ Vertical inclination angle of the strain removing roll

That is, the easy-to-split aluminum-deposited film of the present invention has a large number of non-penetrating holes having various depths and sizes randomly formed on the entire surface of one side by pressing high-hardness fine particles having sharp corners. With plastic film,
The plastic film has an aluminum vapor deposition layer formed by depositing aluminum or an aluminum alloy on the surface of the plastic film having the non-penetrating hole and the inner surface of the non-penetrating hole .
The non-penetrating holes have an average depth corresponding to 40-80% of the thickness of the plastic film and a maximum depth corresponding to 90% or less.
The average hole diameter of the non-penetrating holes is 15 to 40 μm.
It is characterized in that the distribution density of the non-penetrating holes on the surface of the plastic film having the non-penetrating holes is 10,000 to 50,000 pieces / cm ² .

Claims (15)

A plastic film having a large number of non-penetrating holes of various depths and sizes randomly formed on the entire surface of one side by pressing high-hardness fine particles having sharp corners.
A flammable aluminum vapor-deposited film comprising: a surface of the plastic film having a non-penetrating hole and an aluminum vapor-deposited layer formed by vapor-depositing aluminum or an aluminum alloy on the inner surface of the non-penetrating hole. In the easily splitable aluminum vapor-deposited film according to claim 1.
A flammable aluminum-deposited film, wherein the non-penetrating holes have an average depth corresponding to 40 to 80% of the thickness of the plastic film and a maximum depth corresponding to 90% or less. In the easily splitable aluminum vapor-deposited film according to claim 1 or 2.
The average hole diameter of the non-penetrating holes is 15 to 40 μm.
An easily splitable aluminum vapor-deposited film, characterized in that the distribution density of the non-penetrating holes on the surface of the plastic film having the non-penetrating holes is 10,000 to 50,000 pieces / cm ² . In the easily splitable aluminum vapor-deposited film according to claim 3.
Easy-to-split aluminum characterized by a distribution density of 10,000 to 50,000 pieces / cm ² of the non-penetrating holes in an arbitrary region of 1 cm × 1 cm on the surface of the plastic film having the non-penetrating holes. Vaporized film. In the easily splitable aluminum vapor-deposited film according to any one of claims 1 to 4.
A fragile aluminum vapor-deposited film, characterized in that the thickness of the plastic film is 9 to 25 μm. The fragile aluminum-deposited film according to any one of claims 1 to 5, wherein the fragile aluminum-deposited film has an average thickness of 40 to 100 nm. In the easily splitable aluminum vapor-deposited film according to any one of claims 1 to 6.
An easy-to-split aluminum-deposited film characterized in that the pore diameter distribution of the non-penetrating holes is in the range of 10 to 60 μm. In the easily splitable aluminum vapor-deposited film according to any one of claims 1 to 7.
A flammable aluminum vapor-deposited film characterized in that the distance between each non-penetrating hole and the nearest adjacent non-penetrating hole is 30 μm or less. The easily fragile aluminum vapor-deposited film according to any one of claims 1 to 8, wherein the plastic film is a polyethylene terephthalate film. The easily splitable aluminum vapor-deposited film according to any one of claims 1 to 9.
A printing layer formed on the surface of the easily split aluminum vapor-deposited film on the side where the non-penetrating holes are not formed, and
A packaging film having a heat-sealing layer formed on the surface of the easily split aluminum vapor-deposited film on the side on which the non-penetrating holes are formed. The method for producing a flammable aluminum vapor-deposited film according to any one of claims 1 to 9.
A plastic film is passed through a gap between a pattern roll having a large number of high-hardness fine particles having sharp corners randomly on the surface of the roll body and a metal roll, and the high-hardness fine particles make a large number of unpenetrated holes in the plastic film. Form and
A method for producing a flammable aluminum vapor-deposited film, which comprises depositing aluminum or an aluminum alloy on the surface of the plastic film having the non-penetrating hole and the inner surface of the non-penetrating hole to form an aluminum-deposited layer. .. In the method for producing an easily splitable aluminum vapor-deposited film according to claim 11.
The average particle size of the high-hardness fine particles on the roll surface is 15 to 40 μm.
A method for producing an easily split aluminum vapor-deposited film, wherein the distribution density of the high-hardness fine particles on the roll surface of the pattern roll is 10,000 to 50,000 pieces / cm ² . In the method for producing an easily splitable aluminum vapor-deposited film according to claim 12.
A method for producing a flammable aluminum vapor-deposited film, wherein the distribution density of the high-hardness fine particles in an arbitrary region of 1 cm × 1 cm on the roll surface of the pattern roll is 10,000 to 50,000 pieces / cm ² . In the method for producing an easily split aluminum vapor-deposited film according to any one of claims 11 to 13.
A method for producing an easily split aluminum vapor-deposited film, wherein the particle size distribution of the high-hardness fine particles of the pattern roll is in the range of 10 to 60 μm. In the method for producing an easily split aluminum vapor-deposited film according to any one of claims 11 to 14.
A method for producing an easily split aluminum vapor-deposited film, wherein the distance between the high-hardness fine particles of the pattern roll and the adjacent closest high-hardness fine particles is 30 μm or less.

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