The invention relates to a pharmaceutical packaging container for medicinal products, in particular to cardboard boxes for packaging tablets, capsules, granules, ampoules and other types of medicinal products.

The prior art provides a pharmaceutical packaging container configured as a cardboard box comprising opposite-disposed closing joints consisting of inner and outer joints (see, for example, https://yarus-market.ru/upakovka-pod-meditsinu/kartonnaya-up akovka-dlya-mediciny-i- farmacevtiki/farmacevticheskaya-korobka-pachka).

The disadvantage of the known packaging container is the arched bending of the outer closing joints, which is due to the presence of stress in the cardboard caused by the non-uniformly distributed loads along the fold areas and gluing areas. Mechanical impacts to the packaging container, for example, during transportation and long-term storage, result in multiplied stresses. Furthermore, the arched bending of the outer closing joints may be due to temperature changes as a result of natural expansion/compression of the packaging container material.

The arched bending of the outer closing joints may allow the ingress of dust and moisture through the formed gaps inside the packaging container, and, when the joints are provided at the top and bottom of the box, deteriorates the stability of the box on a flat surface. In addition, in some cases, the gap formed as a result of the bent joint allows to bypass the tamper-evident protection as follows: one can navigate a ruler through the gap and gently bend the joint locks while preserving the integrity of the package container. With a box size of 110x110x50 (mm), the size of the protuberance at the upper point of the bent outer joint averages from 1.5 to 4 mm.

Furthermore, the further reinforcement of the outer closing joints of the packaging container by way of layering reinforcing elements leads to a significant increase in the cost of the product, complication of the manufacturing process and a reduction in production speed.

The object of the claimed invention is to reduce the bending ability of the outer closing joints of a pharmaceutical packaging container while not significantly increasing the material costs for the packaging container.

The technical result is the functional reinforcement of the material of the outer closing joints of a packaging container and the reduction in the stresses occurring therein.

The technical result is achieved by the fact that in the cardboard pharmaceutical packaging container configured as a box comprising opposite-disposed closing joints consisting of inner and outer joints, the outer joints are provided with relief embossing, thus forming longitudinal convex elements on the surface of the joints. The relief embossing preferably occupies at least 80% of the joint surface, and the longitudinal convex elements formed by relief embossing are preferably oriented parallel to the direction of the cardboard fibers.

By providing the outer closing joints with relief embossing, forming longitudinal convex elements on the surface thereof that function as stiffeners, functional strengthening of the material of the closing joint is achieved. The stiffeners provided on the surface of the closing joint remove stresses from the material. Further, no other additional materials are required to reinforce the closing joints, and only the properties of the cardboard itself are utilised.

By providing relief embossing over more than 80% of the area of the closing joint, a uniform distribution of stiffeners over most of the joint surface is ensured, thus strengthening the joint in general.

By orienting the convex elements formed by relief embossing parallel to the direction of the cardboard fibers, the torsion stiffness of the joints is further increased.

Fig. 1 shows the layout for the subject pharmaceutical packaging container with marked fold and perforation lines; Fig. 2 shows a general view of the subject packaging container with the upper and lower arrangement of the outer closing joints; Fig.3 shows a general view of the subject packaging container with a lateral arrangement of the outer closing joints.

The cardboard pharmaceutical packaging container is configured as a box having the shape of a parallelepiped and comprising lateral sides 1, 2, 3, 4 and opposite-disposed closing joints consisting of inner joints 5 and outer joints 6. The outer joints 6 are provided with relief embossing, forming longitudinal convex elements 7 on the surface of these joints. Further, relief embossing may form a convex element 8, which is a window for printing variable data, such as data-matrix code, batch number, date of manufacture, etc. Relief embossing occupies at least 80% of the closing surface of each of the outer joints 6. The longitudinal elements 7 are oriented parallel to the direction of the cardboard fibers.

The closing joints 5 and 6 may be disposed both at the top and bottom of the box (see Fig. 1, 2, 3), and on opposite sides thereof (see Fig. ).

The elements 7 and 8 formed by relief embossing protrude above the surface of the cardboard by up to /i of the thickness of the cardboard used. The height of the protrusion formed by the elements 7, 8, as well as the distance between the longitudinal elements 7 are selected based on the density of the cardboard used.

The longitudinal elements 7 distributed over the surface of the joints 6 allow to relieve the material stress placed on the joints 6, increase the stiffness of these elements, thus preventing them from bending. Further, the width of the longitudinal elements 7 may be different. The closing joints may be disposed both at the top and bottom of the box (see Fig.2), functioning as the base and top cover of the packaging container, and on opposite lateral sides thereof (see Fig. 3).

When the closing joints 6 are disposed at the top and bottom of the packaging container, the relief embossing applied on the closing joints increases the stability of the package on the surface and prevents the box from slipping off inclined surfaces.

To confirm the effectiveness of using relief embossing to prevent from bending the joints of cardboard packaging containers made of the same SimWhite cardboard having a density of 300 g/m, two batches of boxes intended for packaging medicinal products of the same design and size were produced. In one of these batches, the closing joints of the boxes were provided with relief embossing, forming convex longitudinal reinforcing elements. On one of the closing joints, in addition to the longitudinal convex elements, a convex element intended for information stamp was provided by relief embossing. Relief embossing was provided on 80% of the area of each of the closing joints. In the second batch of boxes, the closing joints were left smooth, without relief embossing.

According to the results of the study, the boxes provided with relief embossing on the joints showed a reduction in the arched bending of the joints by an average of 1 to 2.5 mm. 10 exemplary boxes were used as samples, the result was stable in all samples.

Thus, the invention makes it possible to improve the consumer properties of a cardboard pharmaceutical packaging container by significantly reducing the possibility of arched bending of the outer closing joints.