JPS5819334A - Production of packaging material - Google Patents

Abstract

PURPOSE:To obtain a packaging material having a high bond strength between a metallized film and a substrate, by irradiating a heat-bondable resin film with electron beam at a low irradiation dose, subjecting the film with a corona discharge treatment, and forming a metallized film on the treated surface. CONSTITUTION:A heat-bondable resin film 2 such as a polyolefin film is irradiated with electron beam 3 at a low irradiation dose of, e.g., 1-5Mrad, and then subjected to a corona discharge treatment 4, for example, under conditions of 10-40w/m<2>/min to obtain a treated film 5. A metallized film 7 is formed on the surface of the film, for example, by vacuum-metallizing it with aluminum to produce a heat-bondable packaging material 8. There can be obtd, a heat-bondable packaging material which has a high bond strength between the metallized film and a sealant or the substrate and surely prevents the metallized film from becoming transparent or delaminated in a heat treatment such as boiling treatment of a packaging material composed of laminated substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing packaging material OII, and more specifically, the adhesive strength between a metallized film and a sealant, a base material, etc. (In particular, in packaging materials with laminated base materials, it is a thermally adhesive packaging material that reliably prevents delamination and metallization from occurring even during heat treatment of one conductive layer, etc.) Relating to a manufacturing method.

Conventionally, the small heat-adhesive packaging material laminated on one side or the middle of a metallized membrane tube such as aluminum is difficult to penetrate the main tube, so it is relatively unstable against sunlight, etc.
Generally used for packaging crystals, etc. This packaging material is produced by forming a metallized film on one side of a plastic film by vacuum-depositing a metal tube such as aluminum, and then, if necessary, laminating a base material etc. on the surface of the metallized film using an adhesive. However, the packaging material manufactured in this way has low adhesive strength between the sheet tent and the metallized film, and between the base material and the metallized film.
When packaging with this material, delamination is likely to occur, and in the case of packaging materials in which base materials are laminated, heat treatment such as -il carbonation ring may cause the surface of the metallized film to The metallized film itself passes through the sealant layer and melts out, and as a result, the metallized film disappears and the packaging material becomes transparent III, resulting in poor moisture resistance. There is mK between etc.

The present invention has been conceived through various studies in order to solve the above problem.
In the course of the process, a heat-adhesive synthetic snow film was first irradiated with an electron beam tube and then subjected to a corona discharge treatment. The adhesion strength between the sealan shoulder and the metallized film is significantly increased, and it is possible to effectively prevent deposition and metallized film ostti formation during heat treatment, etc., and the order of electron beam irradiation and corona discharge treatment is changed. Furthermore, the present invention was completed after discovering that the above-mentioned effects cannot be obtained if either one of the ring rings is omitted. That is, the present invention provides thermal adhesive bonding
After irradiating the lll fat film with a low dose of electron beam and mourning, Rona discharge treatment was performed to obtain a treated film, and then a metallized film tube was formed on the treated surface of the obtained Dangerous Area 11 film, and further cleaning was performed as necessary. It is an object of the present invention to provide a method for manufacturing a thermal adhesive packaging material in which a base material is integrally laminated on the surface of the metallized film.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. I will clarify.

Fig. 5 shows an example of a film transport device used for zero-start IRO application, and numeral 1 in the figure is a 2-t roll of heat-adhesive synthetic snow film and 2 oz. The film 2 is unrolled from the expanded roll 1, travels at a predetermined speed in the direction of the arrow X in the figure, and is irradiated with an electron beam as it passes through an electron beam irradiation device 3 placed in front.

Heat-adhesive synthetic resin films include low-density f/9 ethylene, ethylene-acrylic copolymer, ethylene-vinyl acetate copolymer, ionomer resin, medium-density f/9 ethylene,
Films made of high-density polyethylene resins such as high-density F-lyethylene resins, or polyethylene resins, 4-lydelovylene resins, etc., can be used, but low-density ethylene films and non-stretched A♂ ethylene films are particularly preferred. Yes.

As described above, the film 2 is irradiated with a low dose of electron beam when passing through the electron beam shooting device 3, and the irradiation dose is preferably 1 to 5 megavolts, and the irradiation dose is 5 megavolts. Y! If the amount exceeds 0, the deterioration of the film may occur, and the fishing tube of the present invention may not be achieved if the amount is less than 100 yen.

When passing through the electron beam irradiation device 3t, the film 2Fi is irradiated with the electron beam, and then the electron beam irradiation device 30 passes through the corona discharge layer device 4 disposed further forward.
At this time; Rona discharge l&ring is applied.

It is preferable to set the temperature to 40 to 40 degrees.

The treated film 5 obtained by the electron beam irradiation and subsequent corona discharge treatment is then wound onto a take-up roll 6, or a metallization film, e@, is formed on its surface, and a second As shown in the figure, a packaging material 8 in which a metallized film 7 is laminated on a treated film 5 is obtained.

Preferably, the metallized film is formed by a vacuum evaporation method, a sintering evaporation method, or the like. Metallai/I [7a Alkenium, chromium, nickel, metallurgy,
The metallized film 7 can be formed from tin dioxide, etc., but the metallized film 7 is preferably formed from aluminum in terms of ease of manufacture, cost, safety and hygiene, and versatility.
00~$06 A-once and Sui-jin are most likely.

The packaging material 8 prepared in this way has a heat-adhesive tube,
Although the t★ can be suitably used for packaging of vase seed commercial crystals, the metallized film 71 [K! # can also be laminated and used as tube packaging material.
Wow.

That is, an example of an apparatus for manufacturing a packaging material with a skin and a base material is shown in which a base material is laminated on the surface of the metallized film 7 of the packaging material 8 manufactured by the method described above. 9 in Figure 3 is a base material laminated on the metallized film fil of the packaging material 8.
With the wound roll, the base material lO fed out from this roll 9 runs in a predetermined direction (the same direction as the arrow Y in the figure lf13),
By the roll coater 11 arranged at the front in the running direction,
A Frethane adhesive is applied to the top surface. An adhesive is applied to the top surface and passed through the substrate io#i' and then heated through the open 12 where the adhesive is dried.

The base material IO is 4-riderobylene film, f-lyethylene tele-7 tallate film, I rear electric P film,
/recarnate film, dichloride dx film, or a laminate of two or more of these films can be suitably used. In addition, the amount of ILIII agent applied is 5 to 1 (y/
It is preferable to set it as d.

The base material that has passed through the open 12 is then passed through the nip roll IB? The packaging material 8 having the metallized film formed on its surface is fed out from the roll 14 and supplied to the nip roll, where the metallized film A[7 is laminated on the base material 104 and the adhesive coated m. At the same time, the two are pressed together by nip rolls and integrated, and as shown in FIG. ' is produced. The packaging material is wound onto a roll 16 and used as appropriate.

In this example, a thermoadhesive synthetic resin film was irradiated with electron beams, and then a corona discharge J611 tube was applied.
O formed on the surface of the metallized film tube film significantly improves the adhesive strength between the film and the metallized film, making this material KI! When used, there is no accident of the metallized film peeling off, and the irradiation dose of the electron layer is a low dose Q, so that it does not exceed the deterioration tube into the packaging material.

In addition, since the adhesive strength between the packaging material wire thermal adhesive synthetic resin film, the metallization group, and the base material 0, which is integrated with the metallized film m of this packaging material and the entire base material laminated, is treated with -il treatment. It can sufficiently withstand heat treatments such as heat treatment, and it does not cause any inconveniences such as delamination and deterioration, and also reliably prevents the metallized film from becoming transparent, which tends to occur during heat treatment, especially when the metallized film is made of arsenium. Ru.

In addition, in this example, the heat-adhesive synthetic resin film t
Although it was designed to be fed from an a-ru and supplied to the electron beam irradiation device, the present invention is not limited to this, but it is also extruded into a film using a heat-adhesive synthetic resin Mt extrusion horizontal tube, and this is directly supplied to the electron beam irradiation device. It is also possible to extrude the lamination of base materials5)
The present invention may be carried out by employing the Neissian method, and various other modifications may be made without departing from the gist of the present invention.

Therefore, in the present invention, a heat-adhesive synthetic resin film is irradiated with a low dose of electrons and then subjected to a corona discharge treatment tube to obtain a treated film, and then a metallized film is applied to the film surface of the film. As a result, the adhesive strength between the geographical film (sealant layer) and the metallized film is high, and this material is difficult to cause delamination damage. 1 again.

When a base material is laminated on a metallized film, it can sufficiently withstand heat treatment such as oil treatment, and does not cause problems such as delamination. Especially when the metallized film is made of aluminum, The transparent phenomenon of the metallized film that occurs is also reliably prevented. Furthermore, according to the method of the present invention, the heat-adhesive synthetic resin film is irradiated with electron beams during production, so its heat resistance and oil resistance are improved.
It is also expected to have stress crack resistance, bactericidal effect, etc.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples.

[Examples 1 and 2] Stretched I rederoselene film (thickness: 60 μm) was used as the heat-adhesive synthetic resin film, and was irradiated with electron AT of 3 and 5 megavolts. Then 30W~/f+C)
Corona discharge treatment was performed under the following conditions, and the resulting Kouri film was wound up into a t-roll. This treated film was transferred to a vacuum evaporation device, and one side of the film was coated with Alden Ekumu's metallized film tube 6.
The packaging material according to the present invention was obtained by vapor deposition to a thickness of 0.00 mm.

Further, a polyethylene terephthalate film (thickness 12 μm) was used as a base material, and a urethane adhesive was applied to the surface at a ratio of 4t/d, and the surface obtained by the above method was dried. By pasting the metallized film surface of the packaging material, the heat-adhesive synthetic resin film 5 shown in FIG. 4, the metallized film 7, the adhesive layer 15, and the base material 10 were laminated to produce a packaging material. Various tests during the manufacturing stage and on the obtained packaging materials) 1-Results Y
t is shown in Table 1. For comparison, the results of various tests in which the processing order of electron beam and corona discharge were changed are also shown as comparative examples.

It is clear from Table 111 that only when a heat-adhesive synthetic resin film is irradiated with an electron beam and then subjected to corona discharge treatment (!J! Example 1.2), its wettability and tape method adhesion are improved. The forces are as large as 42, 45 dyn@/ai and sso, 9oor7"z5ai, respectively, and the toy lyra construction adhesive strength is 41400 and 450 F/25 m.
+ It is large and difficult to peel off. Furthermore, although these packaging materials sufficiently withstood the expansion test, and neither the aluminum film became transparent nor the carbon dioxide was observed, the packaging materials were exposed to electron beams and corona in a processing order other than Example 1.2. In cases where discharge treatment is performed or in cases where either one of the treatments is omitted (Comparative Examples 1 to 6), y-like ζ
Neat adhesive force is small, and also? When tests were carried out, it was found that the Arunji five-man became transparent, the Delaonesi seal, etc., and could not withstand use in a meeting.

[Examples 3 and 4] A packaging material tm was prepared in the same manner as in the previous example except that a low-density 19 ethylene film (thickness lOOμ) was used as the heat-adhesive synthetic resin film, and various tests were conducted. Ta. The results are shown in Table 2.

As is clear from Table 2, in the case of this example as well, only when the heat-adhesive synthetic resin film was irradiated with electron beams and then corona discharge I & I1 was performed, the packaging material with diagonal lines and good performance tubes was obtained. There were 4 of them.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an example of a packaging material manufacturing device used in carrying out the present invention; Fig. 2 is an enlarged side view showing an example of packaging material manufactured by the enlarging device; 1 is a schematic side view showing an example of an apparatus for manufacturing a packaging material in which a base material is further laminated on a metallized surface, and I [Figure 4 is an example of a packaging material manufactured by the same apparatus] in which a base material is laminated on a metallized surface. FIG. 2... Heat-adhesive synthetic resin film, 3... Electron beam irradiation device, 4... Corona discharge irradiation device, 5... Treatment arm, 7... Metallized film, 8... packaging materials,
10...Base material.

Claims (1)

[Scope of Claims] l A treated film is obtained by irradiating a heat-adhesive synthetic resin film with a low dose of electrons and then subjecting it to corona discharge treatment,
A method for producing a heat-adhesive packaging material, which is characterized in that a metallized film tube is then formed on the film layer of the obtained treated film. 2. The manufacturing method according to claim 8, wherein the heat-adhesive synthetic resin II film is a 4-lyolefin film. 3. The manufacturing method according to claim 1 or 2, wherein the electron beam irradiation dose is 5 to 5 megarays. 4: Irona discharge treatment conditions are lθ~40W/d/f
+ The manufacturing method according to any one of claims 111111 to IN3. 5 Claim I in which the metallized film is formed by vacuum evaporating aluminum! The manufacturing method according to any one of Items 1 to #I4. 6 A heat-adhesive synthetic resin film was irradiated with a low amount of electron beam and then subjected to corona discharge treatment to obtain a film of 11.
Then, the metallized film is obtained by processing the film! A method for producing a thermally adhesive packaging material, which comprises integrally laminating a base material on the surface of the metallized film after forming the metallized film. 7. A method for producing a recorder according to claim tK6, wherein the heat-adhesive synthetic resin film is an I-lyolefin-based film. 8 Claim 111F in which the electron beam irradiation dose is 1 to 5 megarads! The manufacturing method according to item 6 or 7. 9. The manufacturing method according to any one of claims 111IIa to 8, wherein the conditions of the corona discharge treatment are 10 to 40 W/dA. A claim in which the 10 metallized film is formed by vacuum evaporating aluminum. 11. The manufacturing method according to any one of the following categories SGS to 9. 11 The substrate is -rideropyrene film, 4-lyethylene terephthalate film, 4-rea<y film, 4-liquor nate film, -5-vinyl chloride film, or two of these. A manufacturing method according to any one of patent claims o*m*s to 1110, which is the above composite laminate.12 Any of patent claims 01111116 to 1111, in which the metallized IK urethane adhesive tube is used to laminate the base material together. or the manufacturing method described.