JPH0631084B2 - Mold for attaching labels to flexible articles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a label attachment mold. More specifically, the present invention relates to a label attachment mold for heating a label having an adhesive surface formed by applying a heat-sensitive adhesive to one surface of a label and attaching the label to the surface of a flexible article uniformly and with good adhesiveness.

(Prior Art) It is necessary to attach a label on the surface of a flexible container such as a blood bag or an infusion bag in order to indicate the type and property of the content of the blood or infusion agent contained in the container. There is. Conventionally, a flexible article such as a flexible container has often been pressure-bonded with a pressure-sensitive label having an adhesive surface that exhibits tackiness at room temperature, and the pressure-sensitive label is often attached to the flexible article. The double-adhesive force of the pressure label is generally weak, and the adhesive force of the adhesive surface decreases with time, so that the label may be peeled off naturally or intentionally. For example, if the label that indicates the blood type (ABO method, RH method, etc.) of the blood bag is peeled off, or if it is replaced intentionally or accidentally, the blood type will be incompatible during blood transfusion, etc. Therefore, it is not appropriate to use such a pressure-sensitive label because it may cause a serious accident such as death of a patient.

From such a point of view, recently, a method has been adopted in which a label having an adhesive surface formed by applying a heat-sensitive adhesive to one surface of a label is heated and attached to a flexible article. Since the adhesive strength of the heat-sensitive adhesive is strong at room temperature and is less deteriorated with time, the above-mentioned is possible if the label can be sufficiently heated and substantially evenly adhered to the surface of the flexible article. The problem of label peeling does not occur. Conventionally, when such a label is continuously attached to a plurality of flexible articles, the suction surface of a mold provided with suction holes communicating with suction means is preheated by a heater or the like, The label was suction-adhered to the surface, the heat-sensitive adhesive of the label was melted, and the label was pressed and stuck to the label sticking surface of the flexible article. However, since the suction surface of the mold is a smooth surface, when a thin and flexible label is suction-adhered, a small amount of air remains between the suction surface and the label to easily form an air mass, In the area where such an air mass is formed, the heat of the mold is not sufficiently transmitted to the heat-sensitive adhesive because the air mass functions as a heat insulating layer, which causes a defective adhesion area. It was Furthermore, the sticking surface of flexible articles such as blood bags may have some irregularities, especially when there are contents, so it is possible to attach a label that adheres to the mold. When the flexible article is pressed, air enters between the label and the sticking surface of the flexible article, and the label comes into contact with the sticking surface of the flexible article in the area where such air remains. It was not possible to do so, and a non-adhesive part was created. When such a poor adhesion or non-adhesion site occurs near the periphery of the label, the label peeling problem still remains in the label using such a heat-sensitive adhesive.

(Problems to be Solved by the Invention) Accordingly, it is an object of the present invention to provide an improved flexible article labeling mold. The present invention also relates to a label attachment mold for heating a label having an adhesive surface formed by applying a heat-sensitive adhesive to one surface of the label and attaching the label to the surface of a flexible article uniformly and with good adhesiveness. A further object of the present invention is to provide a label attachment mold capable of performing label attachment without the risk of peeling of the attached label.

(Means for Solving Problems) The above-mentioned various objects are a label attaching mold for attaching a label having an adhesive surface formed by applying a heat-sensitive adhesive on one surface to a flexible article, and It has a label adsorption surface having concave portions of 0.5 to 2 mm, a depth of 0.1 mm or more, and an interval of 1 to 5 mm, and the label adsorption surface has a regular or irregular shape formed on substantially the entire surface. This is achieved by a label-attaching mold, which is characterized by arranging regular irregular portions and suction holes surrounded by the convex portions of the irregular portions.

The present invention also shows a label attaching die for a flexible article, which is formed by arranging concave portions formed in a lattice shape on the label adsorption surface. The present invention further shows a label attaching die for a flexible article, which comprises a concave portion occupying an area of 10 to 90% of the label adsorption surface with the central portion of the label adsorption surface as the center. is there.

(Operation) Then, the label attaching mold 5 of the flexible article of the present invention
Has a label adsorption surface 6 as shown in FIGS.
The label adsorption surface 6 is provided with a regular or irregular concavo-convex portion 3 formed on substantially the entire surface and a suction hole 4 surrounded by the convex portion 3a of the concavo-convex portion 3 at the maximum. It is a feature of.

As shown in FIGS. 4a and 4b, the conventional labeling metal mold 105 has a smooth label adsorption surface 106. Therefore, the labeling metal mold 105 is used to label a flexible article. When applying, as shown in Fig. 4a,
The label 2 is applied to the mold 10 while sucking the ambient air from the suction hole 4.
When the label 2 is closely attached to the label attracting surface 106, the label 2 is easily bent because it is thin and soft, and as shown in FIG. Even if the label sticks to the label, the label 2 cannot stick to the label attracting surface 106 because air enters between the label 2 and the label attracting surface 106 at other portions to form the air lump 7. A condition arises. For this reason, in the portion where the air lump 7 is formed, the air lump 7 acts as a heat insulating layer, so that even if the mold 105 is heated, heat is not sufficiently transmitted to the label 2 and the heat-sensitive adhesion of the adhesive surface 1 The agent is not melted, resulting in poor adhesion at this site. Further, when the label 2 which is suction-adhered to the label suction surface 106 of the mold 105 is pressed against the label sticking surface 9 of the flexible article 8, the label sticking surface 9 is changed because it is a flexible article. Shows some irregularities, and air remains between the label 2 and the label attaching surface 9 as shown in FIG. 5, and the air 2 formed by this air adheres the label 2 and the label attaching surface 9 to each other. This will be impeded, resulting in poor adhesion at the site where such air mass 10 is formed.

On the other hand, in the case of using the label attaching mold 5 of the present invention, as shown in FIG. 2 a, the label 2 is attached to the label suction surface 6 of the mold 5 while sucking the ambient air from the suction holes 4.
When the label 2 is bent and air enters between the label suction surface 6 and the label 2 when the label 2 is closely attached to the label 2, the air is formed by the uneven portion 3 provided on the label suction surface 6 as shown in FIG. 2b. It is dispersed in the created space 11 and does not form an air mass. Therefore, the label 2 is uniformly adhered to the label suction surface 6 over the entire surface, and the label 5 is heated by heating the mold 5.
The heat-sensitive adhesive on the adhesive surface 1 is sufficiently and uniformly melted over the entire surface. Further, when the label 2 sucked and brought into close contact with the label suction surface 6 of the mold 5 is pressed against the label sticking surface 9 of the flexible article 8, there is unevenness on the label sticking surface 9 of the flexible article 8. Even if air remains between the label 2 and the label sticking surface 9 as shown in FIG.
As shown in FIGS. b and c, the label 2 is bent by pressing so as to enter the concave portion 3 a of the mold 5, and the adhesive surface 1 of the label 2 has a large number of uniform and fine depressions 12. The air is dispersed in the depression 12 and does not form an air mass. Therefore, the label 2 is evenly and well adhered to the label attaching surface 9 of the flexible article 8. Furthermore, when a large number of uniform and fine recesses 12 are formed on the adhesive surface 1 of the label 2 in this manner, a portion of the adhesive surface 1 of the label 2 that comes into contact with the label attaching surface 9 of the flexible article 8. The heat-existing adhesive present in the part partially flows into the adjacent depressions 12 when pressed. As a result, as shown in FIG. 3c, the heat-sensitive adhesive layer in the portion of the flexible article 8 that comes into contact with the label attachment surface 9 becomes thinner, and a stronger adhesive force can be expected.

Hereinafter, the present invention will be described in more detail based on embodiments.

FIGS. 1a to 1e show one embodiment of the label attaching mold of the present invention. That is, FIG. 1a is a plan view of the same mold, FIG. 1b is a sectional view taken along the line AA of FIG. 1a, and FIG.
FIG. 1a is an enlarged plan view of a C portion of FIG. 1a, and FIG. 1e is an enlarged sectional view of a C portion of FIG. 1a.
Further, FIG. 1f is an enlarged plan view of a surface portion in another embodiment of the label attachment mold of the present invention, and FIG. 1g is an enlarged sectional view of the surface portion in the same embodiment.

The label attaching die 5 of the flexible container of the present invention includes the first to the following.
As shown in FIG. 6E, the label suction surface 6 has a regular or irregular concave-convex portion 3 formed on substantially the entire surface thereof and the convex portion 3a of the concave-convex portion 3. The suction holes 4 are provided in the.

As shown in FIG. 1a and FIGS. 1d to e, the label suction surface 6 of the mold 5 is provided with the uneven portion 3 on substantially the entire surface. The pattern of 3 is arbitrary and can be obtained, for example, by forming the recesses 3a in a linear shape, a grid shape, a dot shape, or the like, but preferably, as shown in FIGS. 1a and 1d to e, the recesses 3a are formed. Is the concavo-convex portion 3 having a grid pattern. The irregularities 3 may be regular or irregular, but are preferably regular. Further, the width of the concave portion 3a of the uneven portion 3 is 0.5 to 2 m.
m, preferably 0.5 to 1.0 mm, and the depth of the recess 3a is
It is desired that the distance between the recessed portions 3a and the recessed portions 3a is 0.1 mm or more, preferably 0.5 mm or more, and 1 to 5 mm, preferably 2 to 3 mm. Further, such a concave portion 3a may be arranged so as to occupy an area of 10 to 90%, preferably 40 to 70% of the label suction surface with the center of the label suction surface 6 of the mold 5 as the center. desirable.

Further, as shown in FIGS. 1A to 1E, a plurality of suction holes 4 surrounded by the convex portions 3b of the concave-convex portion 3 are formed through the label suction surface 6 of the mold 5, and the suction holes 4 are It communicates with a cavity 13 provided inside the mold 5. The cavity 13 is communicated with the suction means when the die 5 is assembled to the press device. In addition, in FIGS. 1a to 1e, the suction hole 4 is formed in the convex portion 3b of the concave-convex portion 3. Although the suction hole 4 is provided, the suction holes 4 are provided with the first f to g as long as they are surrounded by the convex portion 3b.
As shown in the figure, it may be provided in the concave portion 3 a of the uneven portion 3. Further, the mold 5 of this embodiment is provided with a heater insertion hole 14 for inserting a heater as a heating means and a thermometer insertion hole 15 for inserting a thermometer (thermocouple).

A label is attached to a flexible article by using the label attaching die having the above-described structure, as follows.

First, the cavity 13 of the mold 5 is communicated with a suction device (not shown), and a heater is installed in the heater insertion hole 14 of the mold 5. In addition, in the mold 5 of the present embodiment,
Although the heater inserted in the heater insertion hole 14 is used as the heating means, the heating means is not limited to this, of course, as long as the label suction surface 6 of the mold can be heated to a desired temperature. It can be anything. Further, a thermocouple is inserted into the thermometer insertion hole 15 of the mold 5.

After mounting a predetermined device on the mold 5 in this manner, the label suction surface 6 of the mold 5 is brought into close contact with the label 2. As the label 2, an adhesive surface formed by applying a heat-sensitive adhesive, for example, a heat-sensitive adhesive containing ethylene-vinyl acetate copolymer, polyethylene, polypropylene, ethylene-ethyl acrylate copolymer, polyamide or polyester as a main component. Use a label with. When the suction device is operated while the label suction surface 6 of the mold 5 is in close contact with the label 2, the suction hole 4 communicating with the cavity 13 is formed.
The label 2 can be sucked together with the ambient air, and the label 2 can be sucked onto the label suction surface 6.

Here, as described above, since the concave-convex portion 3 is provided on substantially the entire surface of the label suction surface 6 of the mold 5, even if air enters between the label suction surface 6 and the label 2. Since the air is dispersed in the space 11 formed by the uneven portion 3, the label 2 is evenly attached to the label suction surface 6.

Next, the mold 5 that adsorbs the label 2 is placed on the label sticking surface of the flexible article 8, and the label 2 is pressed against the label sticking surface 9. The flexible article 8 to which the label 2 is attached is, for example, when the flexible article is a flexible container such as a blood bag or an infusion bag, the label 2 is attached with the contents inside. The label 2 may be attached to the label attaching surface 9 even if the label 2 is attached to the label attaching surface 9 even if the label 2 is attached to the label attaching surface 9 even if the label 2 is attached to the label attaching surface 9 when the content is placed inside. The air remaining between the label 2 and the label sticking surface 9 is formed into a large number of uniform and fine depressions 12 on the adhesive surface 1 of the label 2 formed by the concave portions 3a of the mold 5.
Therefore, the label 2 and the flexible article can be brought into contact with each other uniformly and with good adhesion.

At this time, the label suction surface 6 of the mold 5 is attached to the heater insertion hole 14
140 ° C ± 2 in advance by the heater installed inside
It is heated to around 145 ° C to 145 ° C ± 2 ° C, and the heat causes the heat-sensitive adhesive on the adhesive surface 1 of the label 2 to melt and adhere to the flexible article 8.

Then, the label suction by the suction means is stopped, the label sticking surface 6 of the mold 5 is separated from the flexible article 8, the pressure contact is stopped, and the label sticking is completed. The heat-sensitive adhesive having a melting response that is adhered to the flexible article 8 is gradually cooled in the air to be solidified and adhere the label 2 to the flexible article 8 with good adhesiveness.

When the label attaching mold for the flexible article of the present invention is used, the label does not peel off at room temperature and has a tampo proof (sealing) function after being attached because the adhesive is heat-sensitive. As described above, the heat-sensitive label can be applied to the surface of the flexible article uniformly and with good adhesiveness, and the flexibility of the flexible article, particularly medical containers such as blood bags and infusion bags This will bring an extremely advantageous point to the labeling of the container.

(Examples) Hereinafter, the present invention will be described more specifically with reference to Examples.

Example As a die to be assembled in the heating die press machine, 95 × 95 mm
2.3 mm groove with a width of 0.8 mm and a depth of 1 mm on the label adsorption surface of
Centered around the center of the label adsorption surface in a grid pattern at mm intervals 7
When a flexible container was attached with a label continuously by using a die provided over 0 × 70 mm, the defective occurrence rate of the label attachment was suppressed to 0.1% or less.

Comparative example 95 × 95 mm as a die to be assembled in the heating die press
Labeling of a flexible container was continuously performed in the same manner as in Example except that the mold having a smooth label-adsorbing surface was used, and the defective occurrence rate of labeling was 2-3%. It was

From these results, it has been clarified that the use of the labeling die of the present invention can drastically reduce the incidence of defective labeling.

(Effects of the Invention) As described above, the present invention is a label-attaching mold for attaching a label having an adhesive surface formed by applying a heat-sensitive adhesive on one surface to a flexible article and having a width of 0. 0.5 to 2 mm, a depth of 0.1 mm or more, and a label adsorbing surface having concave portions with an interval of 1 to 5 mm arranged, and the label adsorbing surface is a regular or irregular surface formed on substantially the entire surface. When a label is attached to a flexible article using the mold, it is characterized by arranging a general uneven portion and a suction hole surrounded by the convex portion of the uneven portion. Even if air enters between the label adsorption surface of the mold and the label, or between the label and the label sticking surface of the flexible container, the air is dispersed by the action of the unevenness arranged on the label adsorption surface of the mold. To create a substantially air-free state, which allows the label to be evenly distributed over the surface of the flexible article. It can be attached with good adhesiveness, and since the label is attached with a heat-sensitive adhesive, the adhesive force is extremely strong and there is no risk of label peeling.For example, blood bags, infusion bags, etc. It is most suitable as a mold used for labeling a flexible article such as a medical container which causes a serious problem when the label is accidentally peeled off or is intentionally peeled off or replaced. Further, the mold of the present invention is arranged such that the lattice-shaped concave portions are more preferably arranged so as to occupy an area of 10 to 90% of the label adsorption surface with the center of the label adsorption surface as the center. The label is more evenly adhered and adhered to the flexible article.

[Brief description of drawings]

FIG. 1a is a plan view showing an embodiment of a label attaching die for a flexible article of the present invention, FIG. 1b is a sectional view taken along line AA of FIG. 1a, and FIG. 1c is B of FIG. 1a. -B line sectional view, 1d
FIG. 1 is an enlarged plan view of a C portion in FIG. 1a, FIG. 1e is a large plan view of an enlarged portion C in FIG. 1a, and FIG. 1f is an enlarged plan view of a surface portion in another embodiment of the label attaching die of the present invention. FIG. 1g is an enlarged cross-sectional view of the surface portion in the same embodiment, FIG.
FIGS. 3A and 3B are diagrams schematically showing the relationship between the label and the mold when performing the label sticking using the label sticking mold of the flexible article of the present invention, and FIGS. The figure which shows typically the relationship between a label and a flexible article at the time of performing label sticking using the label attachment metal mold | die of the flexible article of this invention, 3c.
FIG. 4 is a partially enlarged view of FIG. 3b, and FIGS. 4a to 4b are diagrams schematically showing the relationship between a label and a mold when performing label sticking using a conventional label sticking mold, and FIG. It is a figure which shows typically the relationship between a label and a flexible article at the time of label sticking using the conventional label sticking die. 1 ... Adhesive surface, 2 ... Label, 3 ... Uneven portion, 3a ... Recessed portion, 3b ... Convex portion, 4 ... Suction hole, 5 ... Mold, 6 ... Label suction surface, 7, 10 ...... Air mass, 8 ... Flexible article, 9 ... Labeling surface, 11 ... Space, 12 ... Dimple.

Claims (3)

[Claims] 1. A label-adhering mold for adhering a label having an adhesive surface formed by applying a heat-sensitive adhesive to one surface of a flexible article, having a width of 0.5 to 2 mm and a depth of 0. 1 mm or more,
It has a label suction surface formed by arranging concave portions with a space of 1 to 5 mm, and the label suction surface has regular or irregular concave and convex portions formed on substantially the entire surface and convex portions of the concave and convex portions. A label attaching die for a flexible article, characterized in that it is provided with surrounded suction holes. 2. A label attaching die for a flexible article according to claim 1, wherein the label adsorbing surface is provided with concave portions formed in a grid pattern. 3. The label adsorbing surface according to claim 1 or 2, wherein a concave portion occupying an area of 10 to 90% of the label adsorbing surface is provided around the center of the label adsorbing surface. A mold for attaching labels to flexible articles.