MXPA97006589A - Container of the type of a plastic bottle and procedure for its manufacturer - Google Patents

Abstract

The present invention relates to: A container of the bottle type (1), which is produced by the use of a minimum amount of material, which possesses a smooth surface area and which is made of synthetic material or plastic with a wrinkle wall of the shirt (2), in which there are wrinkling and recovery operations to its previous condition, container that is connected to a dosing outlet to discharge a liquid product, this container (1) being made basically of synthetic or foamed plastic (3) while less a part of the container (1) is covered with a soft decoration (4) for the container. In the production process of such type of container (1) a stimulating agent is introduced into the synthetic material or plastic (3) and the container is formed by applying the technical method of extrusion, and then covering the container (1) with a decoration (4). As a consequence of the coating, the phenomenon of a roughness in the structure of the surface can be avoided

Description

CONTAINER OF THE TYPE OF A PLASTIC BOTTLE AND PROCEDURE FOR MANUFACTURING The present invention relates to a container of the type of a bottle that is manufactured from plastic / synthetic material according to the complete definitions of claims 1 to 15. This type of container is already known for products that are discharged by a wrinkling or squeezing of the container. The products are made of a compact plastic, basically polyolefin with a density of 1.9 to 0.97 g / cm3. In an effort to reduce the material used in the package, experiments have been carried out by reducing the thickness of the jacket. The reduction of the material used in the production of containers is currently an important objective from the ecological point of view. The reduction of the material used is very "gentle" for the ecology and advantageous for the product itself. The packaging must be recyclable. The cost of the recycling process can be calculated according to the weight of the material used in the containers. The cost of recycling plastic containers is very high. Thus, for example, in Germany the cost is even greater than the price of the material itself. The effort to reduce the material used mainly in packaging is still quite limited from the technical point of view. For example, a 250 ml bottle can be produced through an optimized process taking advantage of a weight limit of 20 grams of polypropylene. The thickness of the wall in the container jacket shows a level of approximately 0.7 mm. An experiment has also been done using 15 grams of polypropylene. The result shows that the thickness of the wall of the container liner is 0.5 mm. This method and other similar methods to reduce the thickness of the wall have shown that when this bottle is used, ie when the product is about to be discharged from the bottle, this container suffers a crack or bending effect, due to the instability of the bottle's jacket, as a result of which the bottle's ability to wrinkle and recover due to the instability of the bottle's shirt, which acquires a lower compression capacity and gives an unattractive shape to the bottle, changes. affecting the quality of the product. In addition, it is also known that a hollow body based on foam is produced by extrusion blowing processes and some other additional process. This hollow body can be made only by the extrusion blowing process, to thereby become a hollow body of foamed material, which in practice, in order to obtain another form in the hot melt process from the extruder, it is also needed to produce containers for a liquid product, for example, agents containing body care products, or medicines. Other procedures according to what is customary to make is to start from some semiprocessed circular or flat material, which is only capable of producing certain shapes such as the round shape or other basic geometric simple shapes. This body or in this case this container is used to isolate the heat, to improve the dimensional stability or for the purpose of coating the container. Certain parts of the body are used to make certain utensils such as, for example, a jar as described. The construction has a volume greater than 1 liter and more than 1.2 mm in wall thickness. However, the intention is to obtain a low density of foam. Particularly in the German report DE-A 15 04 359, it is described that in the test to achieve a low foam density, satisfactory, there is an uncontrolled expansion in the extrusion blow, and in that case it is not possible to regulate the Wall thickness. Therefore, to overcome the problem, an integrated process is suggested to form a solid outer shell and an inner shell although the procedure, although technically a main requirement, can not improve the hollow body property., for example, in the surface area or diffusion density. The drawback of this method is the length of the blowing time during the extrusion blowing operation which is beyond the normal time, usually required to produce a package from a hollow body (German Report DE-A 15 04 359: blowing time = 60 seconds). Also described are containers of foamed material for packing purposes. However, these containers have large discharge ports so that the container liner has no special discharge function such as changing shape and recovering to its previous conditions, which must be done to measure the product discharged. Cellularly expanded containers, that is foam material, have another disadvantage, namely, their surface area is not smooth. This decreases the acceptability of the product by consumers. Accordingly, the object of the present invention is to create a kind of container and find a processing method which uses a relatively minor amount of material but which is capable of overcoming the disadvantages mentioned above and especially producing a kind of container whose surface area is soft. The disadvantages specified above can be overcome by the operations set forth in claim 1 or claim 16. Further advantages in the shape forming according to the present invention are achieved in claims 2 to 15 and 17 to 21. According to the present invention, it produces a container of the type of a bottle for products that are discharged by the consumer by a wrinkling of the container, and these bottles can be produced using a smaller amount of material, ie from 10% to 30% less, however, the bottles they still have an aesthetic quality and capacity similar to bottles made of solid plastic with the use of a high amount of material. The container of the type of bottle to pack, produced by using a smaller amount of material has an exit closure, whereby the shape of the wall of the container can be changed, when its contents are manually discharged through the container. exit, with which the container is wrinkled. The outlet is smaller than the jacket of the container body. All or most of the wall of the container is made of foamed plastic, ie mainly of cellularly expanded polyolefins such as PP, PE or its copolymers. The density of the cellularly expanded material is 10% to 30% less than the density of the same material that does not expand cellularly. The thickness of the container wall, like the other similar containers that exist in the market, in the area of the container liner is thinner than 1.5 mm and preferably 0.5 to 1 mm. The container can be manufactured in a single processing step, ie by extrusion blowing directly from its melting / melting. The production of the foam can be carried out by introducing certain chemical stimulating agents, such as, for example, the polycarbonate acid and the carbonate compound, and thus, by applying an extruder screw, the additive will generate a high mixture and a homogeneous reaction as well as a high distribution of the gas bubble inside the melted plastic. In the case of the present invention, preference is given to this condition instead of thinning the wall of the common plastic container, of a cellular expanded type, inside the inner wall, through an equally distributed bubble space. . The coating of the container liner by using a decoration on the container becomes easier since the surface of the container is smooth. The decoration of the container will make the consumer more familiar with the appearance of the bottle and with its manual operation. Therefore, the decoration of the container can be used as an information vehicle for consumers. The decoration of the container can be produced from a compact material by using a maximum of 20% of the entire thickness of the wall, different from the cellular expanded material, that is foamed. The decoration of the container can be made of some plastic, paper, or a combination of plastic film and paper. The film can be applied by shrinking, gluing, stretching or a combination of such operations, for its attachment to the container. The shape of the container can be arranged in such a way so that it is completely covered with the decorative film. Also, between the decoration of the container and the foamed wall is a thin layer of blocking material made, for example, of PA or EVOH to create a barrier against certain gases or liquids. The introduction of the blocking material into the decoration of the container may be unnecessary if the decorative film has functions as a blocking layer. Therefore, it can be said that the introduction of the decoration of the container will have the immediate effect of acting as a blocking layer. The containers that are made from the foamed plastic as in the form of cups, bowls and the like, are also known. These products are usually manufactured from semi-processed films that have been configured and stretched. They are mostly made of foamed polystyrene and have hard shapes. Most of these containers have a wall thickness of more than 2 mm. The density of the foamed material is less than 50% and is often below 10% of the density of its original material. Foamed films with thinner walls are also known. These films are usually processed to become bags. In accordance with the present invention it is now possible to produce an excellent packaging container with a smooth surface by using 30% less material than in the case of the material that is usually used to produce the foamed containers. Thus, for example, it is possible to produce a bottle with a content of 250 ml by using 15 grams of PP. With this amount a wall thickness of 0.7 mm can be achieved in the area of the container liner, where the foamed polypropylene material shows a density of about 0.72 g / cm3. The roughness of the structure of the surface of the container ("Orange-Peel" or "Orange peel") caused by the foam can be neutralized in an easy way that is covering the surface with a compact and soft decoration of the container or with some other material so that the aesthetic impression of a smooth surface area can reappear. Only through the described range of density and specified decoration of the container can the desired function be achieved as that of avoiding the effect of cracking and the production of a certain aesthetic impression. A major deviation will lead to a degradation in the proper handling of the application or simply affect the quality of the product. The invention will now be described with the demonstration examples. In the drawings: Figure 1. Represents a side view of a part of the vertical section of a container of the type of a bottle made from foamed plastic having a container decoration surrounding the unit and which is glued to the container. the same. Figure 2 is a side view of part of a vertical section of a foamed container with its closure, in which the cover of the wall of the container is presented separately with an approach of the part while the cover of the wall is coated with a shrink film that is the decoration of it. In Figure 1, the first model is shown, as well as the second model of a plastic container 1 of the bottle or bottle type, having a wrinklable wall cover 2, which is mainly made of foamed plastic and which is found surrounded by a container decoration 4. It is preferably manufactured from foamed polyolefin plastic 3, such as, for example, polypropylene, polyethylene or its copolymers. The plastic 3 has a minimum density of 10% and a maximum density of 30% less than the density of the same plastic without foaming. The thickness of the wall of the jacket 2 is made at a level of less than 2 mm, or between 0.5 mm and 1 mm. To measure the liquid product there is present a meter or a sprayer 6 having a metering outlet 7. Separate equipment 6 may be removed, but a smaller but adequate outlet must be present in the neck of the container. The decoration 4 of the container is made of some plastic and / or paper compound 5 and is stuck to the container 1 by the use of an adhesive 10. The container 1, shown in Figure 2 has a shrinkable film 8 which shrinks to adjust and decorate 4 to the container. The container 1 can be closed by the use of a closure 9. The film will end at the top, below the closure 9 so that the wall of the container liner will be completely covered. In order to obtain good qualities in terms of wrinkling and recovery, the bottoms of both containers 1 are fitted with a basically round, rectangular or oval flask bottom, or they have an appropriate shape in the longitudinal section of the container, at least in the wrinkling area.

List of References Container Tissue wall Foamed plastic Vessel decoration Plastic and / or paper compound Metering insert (meter) or injector Metering outlet Shrinkable film Adhesive Closure

Claims (21)

CLAIMS:

1. A container of the bottle or bottle type, which is made from a minimum amount of material, ie plastic with a wrinkle jacket wall, which bears a dosing outlet to measure the liquid product discharged by wrinkling the container and its recovery, characterized in that the container (1) is preferably made of foamed plastic (3), while a minimum part of the container is covered by a soft decoration (4).

The container according to claim 1, characterized in that the foamed plastic or synthetic material is made of polyolefin such as, for example, polypropylene, polyethylene or its copolymers.

The container at least according to claim 1, characterized in that the plastic or foamed synthetic material has a density of less than 10% to 30% compared to the unfoamed plastic / synthetic material.

The container at least according to claim 1, characterized in that the wall of the jacket (2) has a thickness equal to or less than 1.2 mm and that it has a volume of the container up to 300 ml.

5. The container at least according to claim 1, characterized in that the wall of the jacket (2) shows a thickness equivalent to or less than 1.5 mm, with a volume of the container equal to 1000 ml.

6. The container at least according to claim 1, characterized in that the decoration (4) of the container is not foamed.

The container according to claim 6, characterized in that the decoration (4) of the container is made from a foamed plastic, similar or different (3).

8. The container at least according to claim 6, characterized in that between the decoration of the container and the wall of the jacket is a blocking layer, introduced particularly to block the diffusion of gas or liquid.

The container at least according to claim 6, characterized in that the decoration of the container carries a blocking layer.

10. The container at least according to claim 6, characterized in that the blocking layer is made of PA or EVOH.

The container at least according to claim 1, characterized in that a bottom, that is to say a base surface or, where appropriate, a cross-sectional surface of the container, is provided in essentially circular, rectangular or oval shape, at least in the wrinkling area.

12. The container at least according to claim 6, characterized in that the decoration (4) of the container is made of a paper or plastic compound.

The container at least according to claim 6 or 7, characterized in that the decoration of the container consists of a shrink film (8).

14. The container according to the claim 7, characterized in that the decoration of the container consists of a stretchable film.

15. The container according to claim 12, characterized in that between the decoration (4) of the container and the wall of the jacket (2) is an adhesive (10).

16. The process for producing a plastic container according to the first claim, characterized in that a chemical stimulating agent is introduced to the synthetic material or plastic (3), to then shape the container applying the technical method of extrusion while less part of the container (1) is covered with a soft decoration (4) of the container.

17. The process according to claim 16, characterized in that the stimulating agent 4 is polycarbonate acid, or a carbonate compound.

The process according to claim 16, characterized in that the stimulating agent is introduced into the plastic or synthetic material at least by the use of an extruder with worm screw.

19. The method according to claim 16, 17 or 18, characterized in that a decoration (4) is applied to the formed container (1) and is fixed by the use of an adhesive.

The method according to claim 16, 17 or 18, characterized in that a shrinkable film (8) is shrunk as decoration (4) in the container (1).

21. The process according to claim 16, 17 or 18, characterized in that a stretchable film is introduced into the container as a container decoration.