JP3234443B2 - Shrink film package - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shrink film package, and more particularly, to a shrink film package having improved openability.

[0002]

2. Description of the Related Art Conventionally, shrink film packaging has been
As a versatile packaging means capable of performing reliable packaging at low cost, it is widely used for packaging of all kinds of lifestyle-related products such as food, cosmetics, office supplies, and machine parts. There are various types of shrink film packaging. Among them, a PVC film has been used for a pillow type shrink packaging which is a mainstream among them. However, recently, as the environmental problem is becoming more and more popular in the world, a polyethylene film or a polypropylene film is used instead of the PVC film.

[0003]

However, the above-mentioned polyethylene film and polypropylene film have a characteristic of high elasticity, and when these are used as shrink films, they are covered by the elasticity. There have been many problems that the opening operation when removing the package becomes difficult. In other words, when the shrink film has high elasticity, the film at the portion expands following the pulling force when trying to open an opening by breaking the appropriate portion of the shrink film. It becomes difficult.

Therefore, various means have been proposed for the purpose of facilitating the opening operation of the shrink film package. For example, as shown in FIG. 3, a perforation (21) is provided in the shrink film (20), and the shrink film (2) is cut from the perforation (21).
0), or as shown in FIG. 4, a knurled seal (32) is provided along the heat seal portion (31) of the shrink film (30), and the seal (32) is pulled. This is a method for assisting the opening operation. However, if perforations or the like are provided in advance on the shrink film, there is a problem that the appearance of the finished product is deteriorated due to wrinkles due to a difference in heat shrinkage, and when performing perforation after packaging, However, it could affect the package. Further, in any of the above-mentioned conventional methods, the problem that at least one of the equipment cost, the material cost, and the processing cost is high cannot be avoided.

The present invention has been made in view of the above-described circumstances, and can be opened very easily, has a good finished appearance, and does not require large-scale equipment. An object of the present invention is to provide a shrink film package that can be obtained at low cost.

[0006]

In order to achieve the above object, a shrink film package of the present invention has the following configuration. That is, in a shrink film package formed by wrapping an object to be packaged such as a box or a container with a shrink film, two adhesive tapes are adhered along a heat seal portion formed by heat welding of the shrink film. The two adhesive tapes are composed of two parts, an adhesive part occupying one side and a knob part occupying the other side from the approximate center, and the edges of the adhesive parts are sandwiched with the heat seal part of the shrink film interposed therebetween. The two adhesive tapes that are arranged facing each other in the proximity state are pulled outward in the horizontal direction.
As a result, the tensile force
Is transmitted to the heat seal section and the heat seal section is
It is characterized in that the.

[0007]

In the shrink film package of the present invention constructed as described above, two adhesive tapes are adhered along the heat seal portion formed by heat welding of the shrink film. , The heat seal portion can be cut very easily. That is, these two adhesive tapes are composed of two parts, an adhesive part occupying one side from the approximate center, and a knob part occupying the other side, and are mutually adhered with the heat seal part of the shrink film interposed therebetween. The adhesive is adhered in such a manner that the edge portions thereof are opposed to each other in a close state, and the elasticity of the shrink film is suppressed at a peripheral portion of the heat seal portion where the adhesive portion is superimposed and adhered. Then, in this state, the pinch portions of the two adhesive tapes are gripped and pulled in a direction to separate them outward, whereby the shrink film is pulled outward with the heat seal portion therebetween while following the adhesive portion of the adhesive tape. Since the elasticity of the shrink film in this portion is killed as described above, the tensile force is transmitted to the heat seal portion without waste, and the cutting action of the heat seal portion is efficiently performed. As described above, in the shrink film package of the present invention, since it is not necessary to perform any processing before the heat shrinkage of the shrink film, problems such as deterioration in appearance due to a difference in the heat shrinkage do not occur, In addition, since a facility having a complicated mechanism is not required, it can be obtained at low cost.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the shrink film package of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of a shrink film package according to the present invention, in which a single box containing goods such as cosmetics is used as a packaged object (1). As shown in this figure, a normal pillow type shrink wrapping is applied to a packaged object (1) by a shrink film (2) made of polyethylene. The shrink film package is provided with a heat seal portion (3) formed at the time of heat welding of the shrink film (2) so as to cross substantially the center of one surface thereof.

The shrink film (2)
, Two adhesive tapes (4) and (4) are adhered one by one on both sides of the heat seal portion (3) along the heat seal portion (3). These two adhesive tapes (4) and (4) are formed in a substantially rectangular shape, and are provided with an adhesive portion (5) which is subjected to adhesive processing so as to occupy one side from a substantially central portion in the longitudinal direction, and the other side. It is composed of two parts with a knob (6) not subjected to adhesive processing. Then, these two adhesive tapes (4) and (4) are connected to the adhesive portions (5) and (5) with the heat seal portion (3) interposed therebetween.
Are adhered to the shrink film (2) in a state where the edge portions (5a) and (5a) on the side of (5) are brought close to each other and butted against each other. Therefore, the side of the knob (6) is located outside the adhesive portion (5) and is floating from the shrink film (2). In addition, this knob part (6)
The edges are rounded so that they do not come out of the way except when they are pinched in the opening operation described later, and are easy to fit and look good.

In the shrink film package constructed as described above, the opening operation of the shrink film (2) can be performed as follows. That is, the above 2
Adhesive tapes (4), knobs (6), (6) of (4)
Respectively by hand, and simultaneously pulling both knobs (6) and (6) outward in the lateral direction (in the direction of arrow X in the figure),
The heat seal portion (3) of the shrink film (2) is cut, and the cut portion is used as a starting point of opening. At this time, since the shrink film (2) is in a state where the elasticity has been killed as described above at the portion where the adhesive portion (5) of the adhesive tape (4) is adhered, the shrink film (2) is Even if the pulling force follows and is subjected to the pulling force in the direction of the arrow X, the elongation is minimized, and the pulling force is efficiently transmitted to the heat seal portion (3). Further, since the heat seal portion (3) is a portion having the weakest tensile strength in the entire shrink film (2), the heat seal portion (3) is broken very smoothly by receiving the above tensile force.

FIG. 2 shows another embodiment of the shrink film package of the present invention. This embodiment is an example in which the packaged object (11) is a bottle container for cosmetics or the like, and a heat seal portion (13) is formed on a shrink film (12) along the longitudinal direction of the packaged item (11). Is what is being done. And also in this shrink film (12), two adhesive tapes (14) and (14) sandwich the edge part (15a) of each adhesive part (15) with the said heat seal part (13) interposed. It is stuck so as to match. Therefore, also in the shrink film package of this embodiment, the two adhesive tapes (14),
(14) By picking each of the knobs (16) and (16) and pulling them laterally outward (in the direction of arrow Y in the figure),
Heat seal part (13) of shrink film (12)
Can be easily broken and opened.

[0013] In the shrink film package configured as described above, the adhesive tape is attached such that the edges of the adhesive portions of the two tapes are as close as possible to each other across the heat seal portion of the shrink film. It is preferable to use a pressure-sensitive adhesive tape whose adhesive portion has a sufficient adhesive force to the shrink film and in which the entire tape does not easily expand and contract. That is, as the adhesive tape, the adhesive portion is securely adhered to the shrink film, and the adhesive force has sufficient durability against the tensile force in the lateral direction, and the adhesive film suppresses the elasticity of the shrink film. By using a material capable of cutting the heat, the cutting action of the heat-sealed portion is effectively exhibited.

In the step of attaching the pressure-sensitive adhesive tape to the shrink film, a general tape-applying device is installed in a rear step of the shrink film packaging machine, and a means for positioning the pressure-sensitive adhesive tape with respect to the heat seal portion of the shrink film is used. By providing, it can be easily automated.

Further, in the above embodiment, a shrink package constituted by using a polyethylene film as the shrink film has been described as an example.
In addition, the present invention can be widely applied to a shrink film package using various films such as a polypropylene film and a polyolefin film as a shrink film.

[0016]

As described above, the shrink film package of the present invention can be easily opened without being influenced by the material of the shrink film. And, in the shrink film package of the present invention, since no processing is performed before the heat shrinkage of the shrink film, there is no problem such as wrinkle generation due to the difference in the heat shrinkage of the shrink film, Good appearance can be achieved. Furthermore, this shrink film package can be provided at low cost without requiring large-scale facilities, and has high versatility applicable to various shrink film packages.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a shrink film package of the present invention.

FIG. 2 is a front view showing another embodiment of the shrink film package of the present invention.

FIG. 3 is an explanatory view showing an example of a conventional shrink film package.

FIG. 4 is an explanatory view showing another example of a conventional shrink film package.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaged material 2 Shrink film 3 Heat seal part 4 Adhesive tape 5 Adhesive part 6 Pick part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 71/08 B65B 53/00 B65D 65/40

Claims (1)

(57) [Claims] A shrink film package formed by packaging an object to be packaged (1) such as a box or a container with a shrink film (2), wherein a heat seal portion (3) formed by heat welding of the shrink film (2). 2), two adhesive tapes (4) are adhered, and these two adhesive tapes (4) are composed of an adhesive part (5) occupying one side from a substantially center and a knob part (6) occupying the other side. two parts with, the shrink film (2) across the heat-sealed portion (3) are opposed to each other of the adhesive portion edge (5) and (5a) in a proximity state of being arranged, facing Two pieces of adhesive tape
(4) is pulled outward in the horizontal direction,
Heat sealing part of shrink film (2)
A shrink film package, wherein the heat seal portion (3) is cut by being transmitted to (3) .