JP6183680B2 - Container with in-mold label - Google Patents

Description

The present invention relates to a container with an in-mold label in which a label is used as an insert material and the label is attached simultaneously with the molding of the container.

As a means for achieving the display of a decoration or a product name or an explanation on the surface of a blow molded container made of synthetic resin, a means for sticking a label printed with a decorative pattern or a product name or an explanation is often used.
Then, as one of the methods for attaching the label, a so-called in-mold label called an in-mold label is set in advance in the mold as an insert material, and the label is attached to the surface of the container at the same time as forming the container. There is a so-called in-mold molding method.

In this in-mold molding method, label sticking is achieved at the same time as forming the container, and there is no need for a sticking operation in a separate process, and there is no step between the surface of the container and the label. There is no risk of deterioration of the appearance or tactile sensation of the molded product due to, and it is possible to reliably obtain a strong and stable sticking of the in-mold label to the container body regardless of the thinning of the blow molded container, for example. It has an excellent operational effect.
For example, Patent Document 1 describes an invention relating to an in-mold label, a blow-molded product with an in-mold label, and a method for manufacturing the same.

FIG. 10 is a cross-sectional view showing a typical layer structure of an in-mold label that has been generally used.
This label 111 is formed by forming a printed layer 113 by flexographic printing on the surface side of an opaque base film 112 made of synthetic paper, and the printed layer 113 by a varnish containing a static preventive agent for preventing electrostatic charge. A heat seal layer 115a is laminated as an adhesive layer 15 that is covered with a protective layer 118 and is adhered and fixed to the surface of the synthetic resin molded product by in-mold molding on the sticking surface side.

JP 2004-136486 A

  Here, the label including the in-mold label is usually attached to the peripheral wall of the cylindrical, elliptical, or rectangular cylindrical body of the container. For example, a content liquid such as shampoo is used. At the time of displaying the sale of the filled container product, there is a problem that the eye catching effect by the label is exerted only in a limited range such as the front part of the body of the container.

In view of the above, the present invention has a technical problem in the above-described container with an in-mold label, in which a label display or a decoration function is exerted in a wide range beyond the limitation due to the size and shape of the container.

The main configuration of the present invention related to the means for solving the above technical problem is:
In the in-mold label-attached container in which the label is attached to the surface of the synthetic resin container from the in-mold molding using the in-mold label as an insert material,
The in-mold label cannot be fixed to the peripheral area of the container by in-mold molding. the non-adhesive area which is formed by the adhesive film laminated not via the adhesive layer and that disposed in,
The in-mold label is in a state where the in-mold label is adhered and fixed to the peripheral wall in the adhesive region excluding the non-adhesive region, and in the non-adhesive region, the in-mold label is in a state of being separated from the peripheral wall of the container or in close contact with the peripheral wall so as to be peelable. It is said to be stuck on the surface.

  Another configuration of the present invention is that, in the main configuration described above, a non-adhesive region is disposed at the end of the in-mold label.

  Still another configuration of the present invention is such that, in the above main configuration, the non-adhesive region of the in-mold label is in close contact with the peripheral wall so as to be able to be forcibly peeled and laminated.

  Still another configuration of the present invention is the main configuration described above, in a state where the non-adhesive region of the in-mold label is separated from the peripheral wall of the container, at least a part of this non-adhesive region is seen from the front of the container. It is said that it is set as the structure which protrudes outside from the outer periphery of this container.

  According to a container with an in-mold label (hereinafter sometimes abbreviated as a label) having the above-described configuration, for example, when the label is attached to the front side of the body of the container, the left and right ends of the label are non-adhesive. When the container product filled with the liquid content is displayed on the product shelf by separating the left and right end parts from the peripheral wall of the body part and expanding it in the left and right direction by making it an area, The eye catching effect on the product can be sufficiently exerted by the flat label.

Here, at the time of in-mold molding, since the container is molded by pressing the label against the cavity surface of the mold with a resin softened or melted at high temperature, the label covers the entire area in the mold. It will be in the state laminated | stacked on the surrounding wall of the container closely.
And after taking out from the mold, the non-adhesive region can be peeled and adhered to the peripheral wall as it is by the rigidity of the label and the non-adhesive region forming method described below, and the laminated state can be maintained. It is possible, and it is also possible to configure such that it naturally peels off from the peripheral wall and separates.

By configuring the non-adhesive area to adhere to the peripheral wall so that it can be peeled and stacked, it can be handled in the same way as conventional labeled containers in production lines, boxing, transportation, and normal display. Can
As described above, when the container product is displayed on the commodity shelf, the non-adhesive region can be forcibly peeled off with a fingertip or the like to exhibit the eye catching effect.

In the above configuration, the method for forming the non-adhesive region can be appropriately selected from various variations in consideration of the purpose of use and productivity. As a typical example, the following method is used. is there.
(1) Predetermined area on the sticking surface side of the label, such as forming a non-adhesive area by applying and drying ink or a coating agent that does not adhere to the peripheral wall of the container in a predetermined area on the sticking surface side of the label A non-adhesive region is formed by laminating a non-adhesive layer that does not adhere to the peripheral wall of the container.
(2) When applying a heat sealant mainly composed of a heat-sealable resin to laminate the adhesive layer on the sticking surface side of the label, an adhesive layer is provided in a predetermined area such as providing an area where the heat sealant is not applied. A non-adhesive region is formed by not stacking layers.
(3) A label is formed by laminating a base material layer and an adhesive film with an adhesive such as an ultraviolet (UV) curable adhesive, and when applying this adhesive by flexographic printing, a predetermined A method of forming a non-adhesive region between the base material layer and the adhesive layer, such as forming a non-adhesive region by making the region a non-application region without an adhesive layer , is particularly suitable .

The in-mold label basically has a layer structure in which an adhesive layer that adheres and fixes to the peripheral wall of the container by in-mold molding is laminated on the sticking surface side of the base material layer that bears the elasticity and heat resistance of the label. Among the examples, the example (1) is an example in which a non-adhesive region is formed by masking the adhesive layer on the sticking surface side, and the example (2) is non-adhesive without partially laminating the adhesive layer itself. This is an example of forming a sex region.
The example (3) is an example in which a non-adhesive region is formed between the base material layer and the adhesive layer of the label. In this case, a part of the label is formed in the non-adhesive region of the label by in-mold molding. The adhesive layer adheres to the peripheral wall of the container, but the base material layer is separated or stuck in a peelable manner through the adhesive layer and laminated.

The container with an in-mold label of the present invention has the above-described configuration.
By using the non-adhesive area provided on the label, the affixed label can be displayed in a flat shape over a wide range regardless of the size and shape of the container. Can be made.

(A) which shows the 1st reference example of the container with a label of this invention is a front view, (b) is a plane sectional view in alignment with the AA in (a). It is a front view of the container used for the labeled container of FIG. It is the top view which looked at the label used for the container with a label of FIG. 1 from the sticking surface side. It is sectional drawing along the BB line of the label of FIG. It is a schematic explanatory drawing of the in-mold shaping | molding process for shape | molding the labeled container of FIG. (A) which shows the 2nd reference example of the container with a label of this invention is a front view, (b) is a side view which cuts and shows a label part longitudinally. It is the top view which looked at the label used for the container with a label of FIG. 6 from the sticking surface side. It is sectional drawing along CC line of the label of FIG. (A) which shows two other examples of the layer structure of a label is another reference example, (b) is sectional drawing of the label used in the Example of this invention . It is sectional drawing which shows the prior art example of a label.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings.
1 to 4 is for explaining a first reference example of the container with the label, FIG. 1 (a) is a front view of a labeled container, FIG. 1 (b) in (a) A- FIG. 2 is a front view of the container 1, FIG. 3 is a plan view of the label 11 as seen from the sticking surface, and FIG. 4 is a label along the line BB in FIG. 3. 11 is a cross-sectional view of FIG.
The container 1 is a direct blow-molded product made of high-density polyethylene (HDPE) resin, and has a mouth tube part 2, a shoulder part 3, an elliptical cylindrical body part 4, and a bottom part 5, a height of 150 mm, and a capacity of 450 ml. It is a box-shaped thing.

The label 11 of the present reference example is rectangular as shown in FIG. 3, and as shown in FIG. 4, from the surface side to the sticking surface side (from the upper side to the lower side in FIG. 4),
It has a layer structure of protective layer 18 / printing layer 13 / base material layer 12 / adhesive layer 15 / masking layer 17.
More specifically, the base material layer 12 is made of polypropylene (PP) resin cast film (CPP), and a printing layer 13 is formed on the surface side of the base material layer 12 by flexographic printing. It is covered with a protective layer 18 by a varnish coat containing an antistatic agent for preventing the above.

In addition, as the adhesive layer 15 on the sticking surface side of the base material layer 12, a heat seal agent mainly composed of low density polyethylene (LDPE) is applied and the heat seal layer 15a is laminated,
Further, in the left and right end regions, the masking layer 17 is laminated by applying an epoxy coating agent so as to mask the adhesive function of the heat seal layer 15a to the peripheral wall of the container 1 in in-mold molding. A region where the layer 17 is laminated is referred to as a non-adhesive region Rn, and a region at the left and right center where the masking layer 17 is not laminated is referred to as an adhesive region Ra.
In the plan view of FIG. 3, the non-adhesive regions Rn located at the left and right ends of the label 11 are shown with cross-hatching so that they can be easily understood.

FIG. 5 is a schematic explanatory view of an in-mold molding process for molding the labeled container of FIG. 1, in which a cylindrical HDPE resin parison 22 is extruded from a die 21 and the upper and lower sides thereof are sandwiched by a blow molding split mold 23. Is shown.
When blown air is blown in this state, the parison 22 expands (see the arrow direction in FIG. 5) and is shaped along the shape of the cavity (see the state of the two-dot chain line in FIG. 5), and the container 1 is formed. However, at the same time as the molding, the label 11 fixedly disposed on the mold surface in advance by the reduced pressure intake passage 24 is stuck along the peripheral wall 4w of the body portion 4 in the mold.

Here, in the case of the label 11 shown in FIGS. 3 and 4, the adhesive region Ra in the left and right central portion in the mold is in a state of being adhesively fixed to the peripheral wall 4 w via the adhesive layer 15. In the non-adhesive region Rn, it is laminated on the peripheral wall 4w through the masking layer 17 so as to be peelable.
Even when the non-adhesive region Rn is taken out from the mold, the non-adhesive region Rn is in close contact with the peripheral wall 4w as shown by the two-dot chain line in the plan sectional view of FIG. ,
Shear stress acts on the interface between the peripheral wall 4w and the masking layer 17 due to residual strain due to molding shrinkage, and this edge is forced by peeling off the left and right edges of the label 11 with a fingertip or the like. The non-adhesive region Rn can be easily peeled from the starting point, and the non-adhesive region Rn is separated from the peripheral wall 4w as shown by the arrow in FIG. Combined with the rigidity, the left and right end portions of the label 11 can be spread flat beyond the left and right outer peripheral edges of the body portion 4 as viewed from the front.
The eye catching effect on the product by the label 11 can be sufficiently exhibited.

Next, FIGS. 6 to 8 is for explaining a second reference example of a container with label, 6 (a) is a front view of a labeled container, FIG. 6 (b) is labeled 11 parts FIG. 7 is a plan view of the label 11 as seen from the sticking surface side, and FIG. 8 is a cross-sectional view of the label 11 along the line CC in FIG.

Here, the container 1 of this reference example is a direct blow molded product made of high-density polyethylene (HDPE) resin, similar to the container 1 of the first reference example shown in FIG. 3 and the body 4 have a shape in which the step at the boundary portion is eliminated.
Further, the label 11 of the present reference example has a vertically long rectangular shape as shown in FIG. 7, and the basic layer structure thereof is substantially the same as the label 11 of the first reference example, and as shown in FIG. From the sticking side (from left to right in Fig. 8)
It has a layer structure of protective layer 18 / printing layer 13 / base material layer 12 / adhesive layer 15 / masking layer 17.

The material of each layer is substantially the same as the label 11 used in the labeled container of the first reference example. However, an extrusion laminate layer 15b made of LDPE resin is laminated on the base material layer 12 by extrusion lamination, and the adhesive layer 15 In addition, by embossing on the sticking surface side of the extruded laminate layer 15b, a large number of recesses 19 are regularly formed as shown in a partially enlarged view in FIG. 7 and FIG. Is characteristic.
Further, the upper end portion of the label 11 is made a non-adhesive region Rn by the masking layer 17.

And this container with a label, as shown in FIG. 6 (a), in the front of the container 1, in a wide range from the lower end portion of the peripheral wall 4w of the trunk portion 4 to the upper end portion of the peripheral wall 3w of the shoulder portion 3, Further, the left and right upper end portions of the label 11 are projected outward from the outer peripheral edge of the shoulder portion 3 so that the eye catching effect of the label 11 is exhibited.
More specifically, the adhesive region Ra of the label 11 is arranged so as to protrude in a curved shape upward at the left and right central portions, and this protruding portion is adhered and fixed to the peripheral wall 3w of the shoulder portion 3 as well. As shown in FIG. 6B, the non-adhesive region Rn of the label 11 is prevented from falling forward, and the sticking posture of the upright label 11 is maintained.

Here, the peripheral wall 3w of the shoulder portion 3 is curved in the vertical direction as well as in the circumferential direction, and is a so-called three-dimensional curved surface. There is a problem that the appearance is easily damaged,
In this regard, in the label 11 shown in FIGS. 6 to 8 used for the labeled container of the present reference example, the adhesive region Ra is disposed so as to protrude upward in the left and right central portions as described above. As described above, a plurality of concave portions are formed by embossing the sticking surface side of the extruded laminate layer 15b to be the adhesive layer 15 while limiting the region to be fixed to the peripheral wall 3w of the shoulder portion 3 to the left and right central portions. By forming 19 regularly, the label 11 can be easily deformed along the curved surface, and the air between the label 11 and the peripheral wall of the container 1 is allowed to escape. Can be suppressed.

Next, FIG. 9 shows two other examples of the layer structure of the label, particularly the layer structure for forming the non-adhesive region Rn.
4 and 8, the layer structure of the label 11 of the reference example is formed by laminating the adhesive layer 15 over the entire region on the sticking surface side of the base material layer 12, and masking layer 17 on a part of the adhesive layer 15. Are formed to form the non-adhesive region Rn.
A further different reference example shown in FIG. 9A is a heat treatment by applying a heat sealant mainly composed of LDPE resin as an adhesive layer 15 to the bonding surface side of the base material layer 12 in the layer configuration shown in FIG. When laminating the sealing layer 15a, the left and right end portions are defined as non-adhesive regions Rn as regions where no heat sealant is applied.

On the other hand, the label 11 used in the embodiment of the present invention shown in FIG. 9B is made of an adhesive film 15c made of LDPE resin or the like on the base layer 12 and made of an adhesive such as an ultraviolet (UV) curable adhesive. The adhesive layer 16 is laminated to form an adhesive layer 15. When the adhesive is applied to the adhesive surface of the base material layer 12 by flexographic printing , a predetermined area is set as a non-application area. it, namely Ru der to form a non-adhesive region Rn by laminating the adhesive film 15c not through the adhesive layer 16 (adhesive layer 15) relative to the substrate layer 12. Then, after the in-mold molding, the non-adhesive region Rn label 11, adhesive layer 15 is a part of the label 11, although the residual Ru while finally adhered and fixed to the peripheral wall of the container 1, the base layer 12 is in a state of being separated from the peripheral wall, or in a state of being adhered and laminated so as to be peelable, so that it is a container with an in-mold label as shown in FIG. 1 and FIG. Can do .

As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, the container with an in-mold label of this invention is not limited to these Examples.
For example, in order to improve the printability of the printing layer 13, an anchor coat layer is laminated on the surface of the base material layer 12. The base material layer 12 is made transparent and the printing layer 13 is formed on the sticking surface side of the base material layer 12. In addition to the variations in the layer configuration for forming the non-adhesive region Rn described above, various variations can be selected as necessary.
Of course, the material of each layer and the lamination method can be appropriately selected in consideration of the purpose of use and productivity.

Also, the label attachment position on the container and the disposition position of the non-adhesive region Rn are not limited to the above embodiment, but the display and decoration functions, eye catching effect, in-mold formability, etc. Can be selected as appropriate.
In addition, for in-mold molding using the label as an insert material, in addition to direct blow molding using HDPE resin described in the examples, biaxial stretch blow molding using various types of synthetic resins, injection molding, A molding method such as thermoforming can be selected.

As described above, the container with an in-mold label of the present invention uses the non-adhesive region disposed on the label to spread the affixed label flatly over a wide range regardless of the size and shape of the container. It is possible to fully show the eye-catching effect on products, and a wide range of usage is expected.

1; Container (container)
2; mouth tube portion 3; shoulder portion 3w; peripheral wall 4 (of shoulder portion); barrel portion 4w; peripheral wall 5 (of trunk portion); bottom portion 11, 111; label 12, 112; base material layer 13, 113; 15, 115; adhesive layers 15a, 115a; heat seal layer 15b; extruded laminate layer 15c; adhesive film 16; adhesive layer 17; masking layers 18, 118; protective layer 19; Split mold 24; reduced pressure intake passage Ra; adhesive region Rn; non-adhesive region

Claims (4)

The label is attached to the surface of a synthetic resin container by in-mold molding using an in-mold label as an insert material, and the in-mold label (11) is bonded to a predetermined area on the attachment surface side by flexographic printing. Adhesive region (Ra) formed by an adhesive film (15c) laminated via an agent layer (16), and the adhesive layer ( nonadhesive area formed by 16) was laminated not via the adhesive film (15c) and (Rn) and that arranged, the in-mold label (11) comprises non-adhesive areas (Rn ) Except in the adhesive region (Ra) except for the adhesive layer (Ra), and in the non-adhesive region (Rn) in a state separated from the peripheral wall of the container (1) or in a peelable manner on the peripheral wall. The immo is characterized by being adhered to the surface of the container (1) in a Container with yield label.
The container with an in-mold label according to claim 1, wherein a non-adhesive region (Rn) is disposed at an end of the in-mold label (11). The container with an in-mold label according to claim 1 or 2, wherein the non-adhesive region (Rn) of the in-mold label (11) is configured to adhere and laminate to the peripheral wall of the container so as to allow forced peeling. In a state where the non-adhesive region (Rn) of the in-mold label (11) is separated from the peripheral wall of the container (1), at least a part of the non-adhesive region (Rn) is viewed from the front of the container (1). The container with an in-mold label according to claim 1, 2 or 3, wherein the container (1) is positioned so as to protrude outward from the outer peripheral edge of the container (1).

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