JP5151267B2 - Laminated material and packaging bag made using the laminated material - Google Patents

Description

  The present invention relates to a laminated material suitable for packaging electronic components, particularly semiconductor products that dislike dust and dust, magnetic disks, silicon wafers, and the like, and a packaging bag made using the laminated material.

  Since products such as semiconductors and precision equipment are extremely reluctant to dust, dust, dust and other dust, their production is performed in a clean room with a high degree of cleanliness. Gloves such as those with high cleanliness are also used. When an article is brought into the environment from outside the clean room, it is often packaged in a plastic film bag.

  As this packaging bag, for example, a protective film layer is provided on the surface of the packaging bag, and after the protective film layer is contaminated by transportation or the like, the contaminated protective film layer is peeled off when transported again into the clean room, and the outermost layer There are films and bags that can return to a clean state (for example, see Patent Document 1).

The said prior art document is shown.
JP-A-7-330020.

  However, as one of the methods for triggering the peeling of the film or bag, a cut is formed in the corner of the sealed portion so that both ends extend to the outer edges of the pair of packaging clean films, and this cut is one of the pair of packaging clean films. It reaches from the surface to the protective film layer interface on the other surface. It is said. A protective film refers to the peeling layer of this specification. Hereinafter, this protective film layer is referred to as a release layer.

  When peeling triggers are created by this method, it is not possible to make a cut at the expected depth because it is necessary to cut with high accuracy to leave only a layer with a thickness of only a micron. There are many cases. For example, a cut is made until the middle of the release layer, and when the release is performed, the release layer is cut and there is no trigger for release, and the function of the packaging bag is lost.

  Conversely, if there is no break to the release layer interface, it will be peeled off at a place other than the release layer interface, and it will be peeled off because it is peeled off at a face other than the release layer interface, and the release layer will be cut and the function of the packaging bag will be lost.

  Furthermore, when the peeling trigger is made by such a method, the size of the trigger can only be set small in the corner of the bag-made product and the heat seal portion. If the trigger is put in other places, the function will be lost because a hole is made in the packaging bag.

  It is possible to increase the chance of peeling by enlarging the seal, but in that case, the inner size of the packaging bag does not change, and the size of the contents that can be wrapped does not change, but only the outer size of the packaging bag becomes larger, producing・ Rising distribution costs and handling problems will occur.

  Peeling trigger by this method is to make the peeling trigger on the opposite side small in the corners of both sides of the bag-made product, so it is difficult to judge the peeling surface, and when trying to peel off the protective film layer opposite to the assumed side, Peeling trigger is lost.

  In order to solve this problem, it is possible to display the position of the peeling trigger and the peeled surface by printing, but the quality is not stable because the size of the peeling trigger is small and close to the finished part of the product.

  The present invention takes into account the above-described problems relating to the peeling trigger when peeling only the release layer of a three-layer laminate material of a release layer, a base material layer, and a heat seal layer, or a packaging bag made using the laminate material. It is an object of the present invention to provide a laminate material that can be easily and reliably peeled off only the release layer, and a packaging bag manufactured using the laminate material.

  The invention of claim 1 of the present invention is made of a laminated material in which three layers of a peeling layer, a base material layer, and a heat seal layer are sequentially laminated, and the relationship between the film width and the bonding width of each layer of the laminated material is a peeling Film width of the layer> film width of the heat seal layer ≧ film width of the substrate layer> bonding width of the release layer and the substrate layer (bonding width a) ≧ bonding width of the substrate layer and the heat seal layer (bonding) The laminated material is characterized by having a relationship of width b) and having a difference in film width of each layer of 1 mm or more.

Thus, according to the first aspect of the present invention, the relationship between the film width of each layer of the laminated material and the bonding width is such that the film width of the release layer> the film width of the heat seal layer ≧ the film width of the base material layer> release. The bonding width of the layer and the base material layer (bonding width a) ≧ the bonding width of the base material layer and the heat seal layer (bonding width b), and the difference in the film width of each layer is 1 mm or more. Therefore, the release layer is formed so as to protrude from the other layers, and only the release layer can be easily grasped.
In addition, the film width here has shown the width direction of winding of each film which has comprised the peeling layer, the base material layer, and the heat seal layer, respectively. The direction perpendicular to the winding width direction is referred to as the film flow direction.

The invention of claim 1 is a laminated material, wherein the film width of the heat seal layer is set to be narrower than the film width of the release layer and wider than the film width of the base material layer. .

Thus, according to the invention of claim 1, the film width of the heat seal layer is set to be narrower than the film width of the release layer and wider than the film width of the base material layer. There will be no contamination by touching layers or adhesives.

The invention according to claim 2 is the laminated material according to claim 1, wherein the release layer is provided with a release trigger portion.

A third aspect of the present invention is the laminated material according to the first or second aspect of the present invention, wherein the peeling trigger portion is subjected to finger grip processing for easy gripping.

As described above, according to the inventions of claims 2 and 3, since the peeling layer is provided with the peeling trigger portion subjected to the finger hooking process, the peeling trigger portion can be easily grasped. There is no slipping through.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the release layer and the base material layer, or the base material layer and the heat seal layer are made of an adhesive or heat fusion. The laminated material is characterized in that the bonding strength between the release layer and the base material layer is weaker than the bonding strength and heat seal strength between other layers.

Thus, according to invention of Claim 4, a peeling layer and a base material layer, or a base material layer and a heat seal layer are bonded together by an adhesive agent or heat fusion, and bonding of a peeling layer and a base material layer is carried out. Since the strength is weaker than the bonding strength and heat seal strength between other layers, when the release layer is peeled off by grabbing the release trigger part, the release layer does not peel off the base layer and the heat seal layer, It can be removed without difficulty from the interface between the release layer and the substrate layer.

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the release layer comprises two layers, and the first release layer comprises biaxially stretched polypropylene and biaxially stretched polyethylene terephthalate. The film, biaxially stretched nylon film, aluminum foil, or a single film or a composite film in which a plurality of films or aluminum foil are bonded together using an adhesive, and the second release layer is made of unstretched polypropylene or polyethylene It is a laminated material characterized by these.

The invention according to claim 6 is the invention according to any one of claims 1 to 5 , wherein the base material layer is formed of biaxially stretched polypropylene, biaxially stretched polyethylene terephthalate film, biaxially stretched nylon film, aluminum. It is a laminated material characterized by comprising a composite film in which any of foils is bonded with an adhesive.

Thus, according to invention of Claim 6 , a base material layer consists of a composite film which bonded any of biaxially stretched polypropylene, a biaxially stretched polyethylene terephthalate film, a biaxially stretched nylon film, and aluminum foil with the adhesive agent. Therefore, the film which comprises a base material layer can be selected according to the function to provide.

The invention according to claim 7 is the laminated material according to any one of claims 1 to 6 , wherein the heat seal layer is made of unstretched polypropylene or polyethylene.

The invention of claim 8 is such that the heat seal layers of the laminated material according to any one of claims 1 to 7 are opposed to each other, and a bonding width of the base material layer and the heat seal layer (bonding width b). It is a packaging bag made by heat-sealing the inner side.

  Thus, the laminated material of the present invention and the packaging bag produced using the laminated material are formed by forming a composite film in which a release layer, a base material layer, and a heat seal layer are bonded together, and are positioned outside the composite film. The peeling layer to be peeled can be easily peeled off from the peeling trigger part, and after peeling off the peeling layer, a clean packaging bag can be obtained easily and reliably.

The present invention will be described in detail below based on one embodiment.
For example, as shown in FIG. 1 , the laminate material (10) of the present invention comprises a release layer (11) and a base material layer (12
) And the heat seal layer (13) are sequentially laminated, and the relationship between the film width and the laminate width of each layer of the laminate material is as follows: film width of release layer> film width of heat seal layer ≧ The film width of the substrate layer> the bonding width of the release layer and the substrate layer (bonding width a) ≧ the bonding width of the substrate layer and the heat seal layer (bonding width b), and for each layer the difference between the film width of 1mm or more Oh is,
Film width of the heat seal layer (13) is narrower than the film width of the peeling layer (11), and and is characterized that you have been set wider than the width of the film of the base layer (12).

  The release layer (11) is provided with a release trigger portion (14), and the release trigger portion (14) is subjected to finger grip processing for easy gripping.

  The release layer (11) and the base material layer (12), or the base material layer (12) and the heat seal layer (13) are bonded together by an adhesive or heat fusion, and the release layer and the base material layer are bonded together. The strength is characterized by being weaker than the bonding strength or heat seal strength between other layers.

  Delete.

  The release layer (11) has a two-layer structure of a first release layer (11a) and a second release layer (11b). The first release layer (11a) corresponds to a base film, and a biaxially stretched polypropylene, a biaxially stretched polyethylene terephthalate film, a biaxially stretched nylon film, an aluminum foil, or a plurality of films or aluminum foil as an adhesive. It consists of a composite film bonded together. The second release layer (11b) corresponds to a sealant film and is made of unstretched polypropylene or polyethylene.

  The base material layer (12) is composed of a composite film in which any of biaxially stretched polypropylene, biaxially stretched polyethylene terephthalate film, biaxially stretched nylon film, and aluminum foil is bonded with an adhesive.

  Moreover, unstretched polypropylene or polyethylene can be preferably used for the heat seal layer (13).

  From the laminated material (10) produced in this manner, the edge having the protruding release layer (11) which becomes the peeling trigger portion (14), for example, is opposed to the opening side (2 The remaining side is heat-sealed (3), and a three-side sealed bag which is the packaging bag (1) of the present invention as shown in FIG. 3 can be produced.

  The form of the packaging bag (1) can be applied to a joint-attached bag (see FIG. 5), a gusset bag and the like in addition to the three-side seal bag.

Next, the present invention will be described in more detail with reference to specific examples .

<Reference Example 1>
A biaxially stretched polypropylene film with a thickness of 20 μm is prepared as the first release layer (11a), and a low-density polyethylene film with a thickness of 40 μm is prepared as the second release layer (11b). A release layer (11) having a layer configuration of biaxially stretched polypropylene film (thickness 20 μm) / adhesive / low density polyethylene film (thickness 40 μm) was produced by laminating via an agent.

A biaxially stretched nylon film having a thickness of 15 μm, an aluminum foil having a thickness of 7 μm, and a biaxially stretched nylon film having a thickness of 15 μm are bonded together by a dry lamination method via a two-component reactive polyester resin adhesive. A base material layer (12) having a layer constitution of stretched nylon film (thickness 15 μm) / adhesive / aluminum foil (thickness 7 μm) / adhesive / biaxially stretched nylon film (thickness 15 μm) was produced.

A low-density polyethylene film having a thickness of 80 μm is prepared as the heat seal layer (13), and the previously prepared release layer (11), base material layer (12), and heat seal layer (13) are of a two-component reaction type. Bonded sequentially through a polyester resin adhesive, biaxially oriented polypropylene film (thickness 20 μm), low density polyethylene film (thickness 40 μm) (11) / adhesive / biaxially stretched nylon film (thickness 15 μm) Laminated material of Reference Example 1 having a layer structure of aluminum foil (thickness 7 μm), biaxially stretched nylon film (thickness 15 μm) (12) / adhesive / low density polyethylene film (thickness 80 μm) (13) (10 ) Was produced.

In addition, each film width | variety and bonding width | variety of a peeling layer (11), a base material layer (12), and a heat seal layer (13) are as follows, The surplus part is collected on one side and the opening edge at the time of bag making ( 2) (see FIG. 4 ). The excess of the release layer becomes the release trigger part (14).
-Film width of the release layer: 370 mm,
-Film width of substrate layer: 360 mm,
-Film width of heat seal layer: 360 mm.

From the laminated material (10) of Reference Example 1 as shown in FIG. 4 in which the surplus part of the release layer protruded by 10 mm at one end edge thus produced, the side having the surplus part of the release layer was used as the opening side (2). A three-sided seal packaging bag having a seal width (10 mm) of the seal part (3) was produced.

At the opening side (2) of this three-sided seal bag, only the peeling layer protrudes from the opening side to form a peeling trigger part (14), so the peeling layer (11) is held with the peeling trigger part (14). When peeled off, the release layer easily peels from the base material layer and the heat seal layer, and a new base material layer is exposed from the three-sided seal bag.
In addition, it will become easier to use the peeling trigger part (14) if a finger hooking process such as a hole for putting a finger is applied to make it easy to grip the peeling layer.

An example of the layer composition of the lamination material of the present invention is typically shown, (a) is a plane explanatory view, and (b) is an AA 'line section explanatory view of (a). It is sectional explanatory drawing which shows typically one reference example of the laminated constitution of the laminated material of this invention. One Example of the packaging bag produced using the laminated material of FIG. 1 is shown, (a) is plane | planar explanatory drawing, (b) is the AA 'line cross-sectional explanatory drawing of (a). The packaging bag of the reference example 1 is shown typically, (a) is a plane explanatory drawing, (b) is an AA 'line cross-sectional explanatory drawing of (a). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective explanatory view schematically showing a palm-attached bag as a packaging bag of the present invention, and FIG.

DESCRIPTION OF SYMBOLS 1 ... Packaging bag 2 ... Open side 3 ... Heat seal, heat seal part 10 ... Laminated material 11 ... Release layer 11a ... 1st release layer 11b ... 2nd release layer 12 ... Base material layer 13 ... Heat seal layer 14 ... Peeling trigger part

Claims (8)

It consists of a laminated material in which three layers, a release layer, a base material layer, and a heat seal layer, are bonded together,
The relationship between the film width of each layer of the laminated material and the bonding width is as follows: film width of the release layer> film width of the heat seal layer ≧ film width of the substrate layer> bonding width of the release layer and the substrate layer (bonding width) a) have a relationship of the bonded width of ≧ substrate layer and heat seal layer (bonding width b), and the difference of each layer of the film width Ri Ah than 1 mm,
Laminate material wherein the film width of the heat seal layer is smaller than the film width of the peeling layer, and characterized that you have been set wider than the width of the film of the substrate layer.   The laminate material according to claim 1, wherein a release trigger portion is provided in the release layer.   The laminated material according to claim 1 or 2, wherein the peeling trigger portion is subjected to finger hooking processing for easy gripping.   The release layer and the base material layer, or the base material layer and the heat seal layer are bonded together by an adhesive or heat fusion, and the bonding strength of the release layer and the base material layer is the bonding strength between other layers or The laminated material according to any one of claims 1 to 3, wherein the laminated material is weaker than heat seal strength. The release layer is composed of two layers, and the first release layer is a biaxially stretched polypropylene, a biaxially stretched polyethylene terephthalate film, a biaxially stretched nylon film, an aluminum foil, or a plurality of films or aluminum foil as an adhesive. made from the composite films were bonded using a second separation layer, characterized by comprising the unstretched polypropylene or polyethylene, laminated material according to any one of claims 1 to 4. The base layer is biaxially oriented polypropylene, biaxially oriented polyethylene terephthalate film, a biaxially oriented nylon film, characterized by comprising the composite film bonded by an adhesive to any of the aluminum foil, claims 1 to 5, The laminated material according to any one of the above. The laminated material according to any one of claims 1 to 6 , wherein the heat seal layer is made of unstretched polypropylene or polyethylene.   The heat seal layers of the laminated material according to any one of claims 1 to 7 are opposed to each other, and the inside is heat sealed from the bonding width (bonding width b) of the base material layer and the heat sealing layer to make a bag. Packaging bag.

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