JPH05943Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a heat-sensitive label for medical containers. Specifically, the present invention relates to a heat-sensitive label for medical containers having an adhesive surface coated with a heat-sensitive adhesive.

(Prior art) It is necessary to attach a label to the surface of a flexible medical container such as a blood bag or an infusion bag in order to indicate the type and nature of the contents of the container, such as blood or infusion. There is. Conventionally, pressure-sensitive labels with an adhesive surface that is sticky at room temperature were often attached to such flexible medical containers by pressure contact. Adhesive strength is generally weak, and the adhesive strength of the adhesive surface decreases over time, resulting in the label peeling off naturally or intentionally. For example, blood type of blood bag (ABO system,
If the label indicating the RH system (RH system, etc.) is peeled off or replaced intentionally or accidentally, blood type incompatibility may occur during blood transfusions, resulting in serious accidents such as patient death. It has not been considered appropriate to use such pressure-sensitive labels because of the risk of causing damage.

From this point of view, a method has recently been adopted in which a heat-sensitive label coated with a heat-sensitive adhesive on one side is attached to a flexible medical container by heating. The adhesive strength of heat-sensitive adhesives is strong at room temperature and does not deteriorate over time, so if the label can be heated sufficiently and adhered evenly to the surface of a flexible medical container, it will work as described above. There is no problem of label peeling. When affixing such heat-sensitive labels to multiple flexible medical containers etc. in succession, the suction surface of the mold, which is provided with suction holes communicating with the suction means, must be heated in advance using a heater, etc. Place the label on the suction surface and suction it tightly.
The label's heat-sensitive adhesive is melted and pressed onto the label attachment surface of the flexible medical container, but the adhesive surface of the flexible medical container has some unevenness, and is particularly difficult to adhere to. This is true when the contents are inside, so when the label that is tightly attached to the mold is pressed onto the flexible medical container, air may be created between the label and the adhesive surface of the flexible medical container. It will remain. Conventional heat-sensitive labels are made by uniformly applying heat-sensitive adhesive over the entire adhesive surface without any gaps, so as mentioned above, the adhesive remains between the adhesive surface of the flexible medical container. Without being dispersed, the air lost its escape and became a large mass of air, which ended up existing in an unspecified location. In locations where such air pockets exist, the label cannot adhere to the adhesive surface of the flexible medical container, resulting in a non-adhesive area. If this occurs, the label becomes easily peelable, and even when such a heat-sensitive label is used, the problem of label peeling remains.

(Problems to be Solved by the Invention) Therefore, it is an object of the present invention to provide an improved heat-sensitive label for medical containers. The present invention also provides a heat-sensitive label for medical containers coated with a heat-sensitive adhesive on one side, which is free from the risk of peeling of the label due to air entrapment during attachment. purpose.
A further object of the present invention is to provide a heat-sensitive label for medical containers that can be applied more uniformly with better adhesion and at a lower cost.

(Means for Solving the Problems) The above objects are achieved by providing a heat-sensitive label for medical containers having an adhesive surface coated with a heat-sensitive adhesive;
The adhesive surface includes a portion coated with a heat-sensitive adhesive;
The label is characterized in that there is a certain proportion of the area where no heat-sensitive adhesive is applied, and the heat-sensitive adhesive is applied without any gaps to the area located at the periphery of the label on the adhesive surface. This is achieved by heat-sensitive labels for medical containers. The present invention also provides a heat-sensitive adhesive for medical containers in which the area ratio of the area coated with the heat-sensitive adhesive and the area not coated with the heat-sensitive adhesive on the adhesive surface is 1:2 to 10:1. This indicates the label.

(Function) According to the present invention, as shown in FIG. 1a, the adhesive surface 2 of the heat-sensitive label 1 for medical containers has a portion A coated with the heat-sensitive adhesive and a portion A coated with the heat-sensitive adhesive. A portion B is provided at a constant ratio, and a portion A coated with a heat-sensitive adhesive is provided over the entire circumference in a portion located at the periphery of the label on the adhesive surface. Therefore, on the adhesive surface 2 of the heat-sensitive label 1 for medical containers, convex portions consisting of the portion A coated with the heat-sensitive adhesive and concave portions consisting of the portion B not coated with the heat-sensitive adhesive are regularly arranged. It has an uneven structure. Therefore, part 1b
As shown in the figure, when the heat-sensitive label 1 for medical containers is attached to an object 3 such as a flexible medical container, the adhesive surface 2 of the heat-sensitive label 1 and the adhesive surface 4 of the object 3 are Even if air 5 remains between the two, as shown in Fig. 1c, the air 5 is uniformly dispersed in the recess formed by the part B where the heat-sensitive adhesive is not applied, and is left as an air mass at an unspecified position. Since the heat-sensitive adhesive is not localized, the convex portion made of the portion A coated with the heat-sensitive adhesive can be uniformly adhered to the sticking surface 4 of the object 3 over the entire surface of the heat-sensitive label 1 for medical containers. . Furthermore, since there is a part A coated with heat-sensitive adhesive all around the adhesive surface located at the label periphery, reliable adhesion is achieved at the label periphery, and the label periphery is There is no risk of peeling off from the surface.

In addition, in the heat-sensitive label 1 for medical containers of the present invention, as shown in FIG. 2, when the heat-sensitive label 1 for medical containers is adhered to the object 3, the heat-sensitive adhesive is Part of the liquid flows from the part A where the heat-sensitive adhesive is applied and moves to the adjacent part B where the heat-sensitive adhesive is not applied. Therefore, the heat-sensitive adhesive layer at the time of application is thinner than the adhesive layer originally applied to the label, and stronger adhesion can be expected (i.e., the adhesion strength is the same as that of the adhesive layer). This is because the thinner the thickness, the stronger it is.) Furthermore, in the heat-sensitive label 1 for medical containers of the present invention, the heat-sensitive adhesive is applied only to a part of the adhesive surface 2, which is different from the conventional product in which the heat-sensitive adhesive was applied over the entire adhesive surface. It is also clear that costs can be reduced compared to

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

The heat-sensitive label 1 for medical containers of the present invention has a part A coated with a heat-sensitive adhesive and a part B not coated with a heat-sensitive adhesive provided on its adhesive surface 2 at a constant ratio. Further, the adhesive surface 2 is characterized in that a portion A located at the label periphery is provided with a portion A coated with a heat-sensitive adhesive over the entire circumference.

In the heat-sensitive label 1 for medical containers of the present invention,
The arrangement of the heat-sensitive adhesive-applied portion A and the heat-sensitive adhesive-unapplied portion B, that is, the application pattern of the heat-sensitive adhesive, is arbitrary in areas other than the peripheral edge of the label. It can be applied in a ring, grid, dot, or line shape. An example of a spiral pattern is a rectangular spiral arrangement that matches the shape of the label as shown in Figure 3, and an annular pattern that includes multiple coaxial spirals that match the shape of the label as shown in Figure 4. A grid pattern may be arranged in a rectangular ring shape, for example, as shown in Fig. 5, and a dot pattern may be, for example, a checkerboard pattern as shown in Fig. 6, or as shown in Fig. polka dot pattern,
Alternatively, specific examples include those arranged in a block pattern as shown in FIG. 8, and as a linear pattern, for example, those arranged with a plurality of diagonal lines as shown in FIG. In the heat-sensitive label for medical containers of the present invention, the heat-sensitive adhesive can be applied in any pattern on the adhesive surface other than the label periphery, but the heat-sensitive adhesive can be applied in any pattern on the adhesive surface at the label periphery. , the heat-sensitive adhesive must be applied without any gaps. This is because if even a part of the peripheral edge of the label is not adhered to the object, the label is likely to peel off. For this reason, it is desirable that the heat-sensitive adhesive be applied in a ring shape to match the shape of the label, as shown in Figures 3 to 9, on the adhesive surface located at the label periphery. For ease of design, it is desirable that the heat-sensitive adhesive be applied in a plurality of coaxial rectangular rings as shown in FIG.

Furthermore, the area ratio of the area A coated with the heat-sensitive adhesive and the area B not coated with the heat-sensitive adhesive on the adhesive surface of the heat-sensitive label 1 for medical containers of the present invention is 1:2 to 10. :1, more preferably 1:1 to 4:1. In other words, if the ratio of the area A to which the heat-sensitive adhesive is applied is smaller than the area ratio of 1:2, the adhesion area of the heat-sensitive label 1 for medical containers to the object 3 will be smaller, and sufficient adhesion will not be achieved. There is a risk that the strength will not be obtained.
On the other hand, if the ratio of the area A to which the heat-sensitive adhesive is applied is larger than the area ratio of 10:1, the air 5 trapped between the heat-sensitive label for medical containers 1 and the object to be adhered 3 will be absorbed. It becomes impossible to measure dispersion,
This is because there is a risk that local adhesion failure may occur and the label may peel off.

In addition, in the heat-sensitive label for medical containers of the present invention, the heat-sensitive adhesive applied to the adhesive surface includes:
Examples include heat-sensitive adhesives containing ethylene-vinyl acetate copolymer, polyethylene, polypropylene, ethylene-ethyl acrylate copolymer, polyamide, or polyester as a main component. These heat-sensitive adhesives are applied to the adhesive surface of a heat-sensitive label for medical containers to a thickness of 2 to 80 mm, more preferably 10 to 40 mm.

The heat-sensitive label 1 for medical containers of the present invention is attached in the same manner as conventional heat-sensitive labels for medical containers. That is, when trying to attach a heat-sensitive label for a medical container to the attachment surface 4 of an object 3, which is a flexible medical container, for example, a suction means (not shown) is attached to the label attraction surface 7 as shown in FIG. 1a. The heat-sensitive label 1 for medical containers is sucked from the side opposite to the adhesive surface 2 onto the label suction surface 7 of a heated press device having a mold 6 having suction holes 8 communicating with the Then, as shown in FIGS. 1b to 1c, the heat-sensitive label 1 for medical containers, which has been brought into close contact with the label adsorption surface 7 of the mold 6, is pressed onto the adhesion surface 4 of the object 3. heating, e.g. 140℃±2℃～145℃±2℃
Heat at a nearby temperature to melt the heat-sensitive adhesive applied to the adhesive surface 2 and uniformly adhere the adhesive surface 2 of the heat-sensitive label 1 for medical containers to the adhesive surface 4 of the object 3 to be adhered. It is something that can be done. At this time, as described above, in the heat-sensitive label 1 for medical containers of the present invention, the adhesive surface 2 has a part A coated with a heat-sensitive adhesive and a part B not coated with a heat-sensitive adhesive.
and are provided at a certain ratio, the object to be attached 3
Even if air is trapped between the label and the heat-sensitive label for medical containers 1, local adhesion failure will not occur, and the adhesive force at the adhesion site is strong, providing a stable adhesion condition. I will do it.

(Effects of the invention) As described above, the present invention provides a heat-sensitive label for medical containers having an adhesive surface coated with a heat-sensitive adhesive. , the heat-sensitive adhesive is not coated at a certain ratio, and the heat-sensitive adhesive is coated without any gaps in the area located at the periphery of the label on the adhesive surface. This is a heat-sensitive label for medical containers that is characterized by
Even if air is trapped between the heat-sensitive label for medical containers and the object when it is attached to an object such as a flexible medical container, the air can be dispersed and distributed evenly over the entire label. Since it is possible to adhere the predetermined area, it is possible to ensure uniform adhesion of the label without the risk of local adhesion failure, and the adhesion at the peripheral edge of the label is ensured. Heat-sensitive labels for medical containers can have stronger adhesive strength because the thickness of the adhesive layer at the area where they are attached to the object to be adhered can be made thinner. It is possible to stably adhere to the object for a long period of time, and the problem of label peeling does not occur. Therefore,
The heat-sensitive label for medical containers of the present invention is preferable as an adhesive label for flexible medical containers such as blood bags and infusion bags. In addition, in the heat-sensitive label for medical containers of the present invention, since the heat-sensitive adhesive is applied only to a part of the adhesive surface,
Compared to conventional heat-sensitive labels for medical containers, raw material costs can be lowered, making it economically advantageous.

Furthermore, in the heat-sensitive label for medical containers of the present invention, the heat-sensitive adhesive is applied in a plurality of coaxial rectangular rings, and the area where the heat-sensitive adhesive is applied and the area where the heat-sensitive adhesive is applied are separated. If the area ratio between the area and the non-containing part is 1:1 to 4:1, the adhesion state of the heat-sensitive label for medical containers can be improved, and an even better heat-sensitive label for medical containers can be obtained. becomes.

[Brief explanation of the drawing]

1a to 1c are cross-sectional views schematically showing the state in which the heat-sensitive label for medical containers of the present invention is attached, and FIG. 2 is an enlarged view showing the state in which the heat-sensitive label for medical containers of the present invention is attached. It is a sectional view, and FIGS. 3 to 9 are plan views showing a heat-sensitive adhesive application pattern of an embodiment of the heat-sensitive label for medical containers of the present invention. 1... Heat-sensitive label for medical containers, 2... Adhesive surface, 3... Target object, 4... Adhesive surface, 5... Air, 6... Mold, A... Applying heat-sensitive adhesive B...the part where the heat-sensitive adhesive was not applied.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A heat-sensitive label for medical containers having an adhesive surface coated with a heat-sensitive adhesive, the adhesive surface having a portion coated with the heat-sensitive adhesive and a heat-sensitive A medical device characterized in that a portion where no adhesive is applied is provided at a constant ratio, and a heat-sensitive adhesive is immediately applied to the portion located at the periphery of the label on the adhesive surface. Heat-sensitive labels for containers. (2) Utility model registration claims where the area ratio of the area coated with heat-sensitive adhesive to the area not coated with heat-sensitive adhesive on the adhesive surface is 1:2 to 10:1. The heat-sensitive label for medical containers according to item 1.