MXPA01003260A

MXPA01003260A - Bottle of thermoplastic material and method for the manufacture and filling of same.

Info

Publication number: MXPA01003260A
Application number: MXPA01003260A
Authority: MX
Inventors: Herrera Comez Francisco
Original assignee: Crystall Fosc S L
Priority date: 2000-04-12
Filing date: 2001-03-29
Publication date: 2005-04-11
Also published as: ES2195678A1; EP1147990A2; BR0101260A; ES2195678B1; EP1147990A3; US20020027122A1

Abstract

The bottle is of a single-piece and comprises a main body (2) with a hermetically closing part (6) delimited by a weakening (7) of the material adjacent to the periphery of the mouth. The bottom part is constituted by a sheet of a thermoplastic material joined to the bottle body by thermowelding. The bottle is closed with a screw-on-cap (8), or a top (12), which are joined to the closing part (6) by means of an adhesive or glue (11). The method comprises the stages of feeding a thermoplastic laminate to a thermoforming machine; heating the laminate to a predetermined temperature; inserting a preformed punch (17) into a negative mold (18) of the bottle (1), situated in inverted position, with the laminate (16) interposed between the punch and the mold; conforming the body (2) of the bottle by means of pressure or pneumatic vacuum; forming the weakening (7) and the closing part (6) by means of a punch (19); filling the bottle with the product (22) to be contained therein, by the upper o pening (20) which will later be the bottom part of the bottle; and thermal weld a laminate (21) of thermoplastic material to the periphery of the said upper opening, determining the bottom part or base and the bottle, being therefore, finished and hermetically sealed.

Description

"BOTTLE OF THERMOPLASTIC MATERIAL AND PROCEDURE FOR THE MANUFACTURE AND FILLING OF THE SAME" Technical sector of the invention. The present invention relates to a bottle of thermoplastic material, of the type of which comprise an essentially prismatic main body molded in one piece, a bottom or base and a mouthpiece, as well as a method for the manufacture and filling thereof . The invention also relates to groupings of the above bottles and the methods for obtaining such groupings.

State of the art For the containment of food products, particularly dairy products such as milk, drinking yoghurt, juices or the like, a multiplicity of embodiments of thermoplastic material bottles are now known, consisting of an essentially prismatic main body molded in one piece. , a bottom or base and an embouchure. At present, these bottles are conventionally manufactured by means of blowing processes of a preform formed from extruded pellets of a thermoplastic material, forming the main body of the bottle in a single piece, with its open mouth, by which Fill the boat-lia, in its right position and once it is conformed, with the product to be contained. After this operation, the mouthpiece is covered with a cap or capsule of a laminar complex made of metallized plastic, which is attached to the annular edge of the mouthpiece by means of adhesive or, alternatively, with a screw cap, optionally provided with a hermetic seal of protection .

In practice, many of the known bottles of this type have imperfect impermeability, being frequent the detection of drips by the joint areas between the capsule and the embouchure. In addition, at present, the production of the final full and closed container is carried out according to a discontinuous or "beating" production process, which comprises the extrusion, heating, blowing, filling and closing stages. These stages are carried out in different stations that may be located in remote locations, or even in very distant production plants. The transport of bottles from one station or site to another requires very strict hygienic measures, which do not always guarantee total asepsis of materials and products and which are very expensive, which poses problems of a logistical nature. To solve the aforementioned drawbacks and problems, the inventors have thought of a new continuous manufacturing process for this type of bottles, which gives rise to bottles of novel concept and design and which also has other additional advantages. Fundamentally, the novel procedure is based on the application of the thermoforming technique, which is, up to the present, unknown in the field of the manufacture of bottles of this type.

Explanation of the invention The object of the present invention is a new bottle of thermoplastic material, of the aforementioned type, which in its essence is characterized in that it comprises a sealing portion of the embouchure, molded together with the body of the bottle forming it with a single piece, said closing portion being delimited by a weakening of the material constituting the bottle, adjacent the periphery of the mouthpiece and the bottom or base being constituted by a sheet of a material Thermoplastic material solidly attached to the lower portion of the walls of the bottle body by heat sealing, after the bottle has been filled with the product it must contain, all adapted so that when exerting a tensile force on the closing portion or pressure greater than a predetermined minimum stress, the weakening is liable to break completely or partially to separate the closing portion from the embouchure, in order to perform the opening of the mouthpiece. According to the invention, in the case of the bottles that incorporate a screw cap, which cooperates with an additional external thread that is provided with the neck of the bottle, the cap is glued on its internal face to the external face of the closure portion by means of of an adhesive or glue, in such a way that, when the cap is unscrewed, the annular weakening is broken. Alternatively, the bottle according to the invention comprises a capsule constituted by a laminar material, attached to the external face of the closing portion by means of an adhesive or glue, in such a way that when manually pulling the capsule, total breakage occurs. or partial weakening. According to another characteristic of the invention, the weakening has an open arc shape and the capsule comprises a traction and retention tab, so that, once the bottle is opened due to breakage of the weakening, it can be closed again by reversing the movement of the bottle. opening of the closing portion so that the capsule covers the formed mouthpiece. Another subject of the present invention is a grouping of bottles of thermoplastic material, characterized in that it comprises a plurality of bottles joined without continuity by their bottom or base by means of ti- easily frangible unions, made of the own thermoplastic material constituting the bottom of the bottles. Another object of the present invention is a grouping of bottles of thermoplastic material, which in essence is characterized by comprising a plurality of bottles and a body for joining them, the connecting body consisting of strips of plastic material and at least a portion of handle, which seamlessly links the strips, in which multiple holes are made of a diameter similar to that of the neck of the bottles, provided with notches of radial extension on its periphery, which provide the edge of the holes of a certain flexibility, all this so that the bottles can be inserted by pressure in the holes, being retained by the effect of tightening the edges of the holes on the necks of the bottles. The subject of the present invention is also a method, of novel concept and functionality, applicable for the manufacture and filling of bottles and groups of bottles as defined in the preceding paragraphs, characterized essentially in that, starting from a sheet of thermoplastic material, it comprises the phases: feeding the sheet of thermoplastic material to a thermoforming machine; heating the sheet to a temperature higher than that of thermoplastic thermoplastic material; introducing a preform punch in a negative mold of the bottle, placed in inverted position, with the sheet interposed between the preform punch and the negative mold; forming the body of the bottle by application of the thermoplastic material against the inner wall of the negative mold, by means of pressure or pneumatic depression, and extracting the preform punch from the mold; forming the weakening and closing portion, by splitting the thermoplastic material by means of a punch; - filling the bottle with the product to be contained, through the upper opening which will then be the bottom or base of the bottle and which is left free by the removal of the preform punch; and thermosoldering a sheet of thermoplastic material to the periphery of said upper opening, the bottom or base being determined and, therefore, finished and hermetically closed the bottle. According to another feature of the process of the present invention, particularly applicable for the manufacture and filling of bottles intended to be closed with a screw cap, the method comprises the intermediate steps of applying glue or adhesive between the inside face of the screw cap and the outer face of the closure portion of the mouth of the bottle and subsequently applying the cap to the mouth. According to the invention, the phase of applying glue or adhesive and applying the cap can be carried out simultaneously to the phase of shaping the body of the bottle, for which the cap itself constitutes the bottom of the negative mold, the thread of the cap forming the surface Molding of the external thread of the bottle. Alternatively, the phase of applying glue and applying the plug is done just after the phase of forming the weakening. According to another feature of the method of the present invention, the method comprises the intermediate step of applying a capsule to the external face of the portion by gluing closing. According to another characteristic of the present invention, the method comprises, after the thermoforming phase, the step of separating each cut, filled and closed bottle, from the rest of the sheets of the material constituting the body and the Bottom of the bottles, respectively. In the invention, for the production of a first type of groupings of bottles, following the heat sealing phase, the step of separating each shaped, filled and closed bottle by cutting is carried out in such a way that the connecting body , which comprises a handle, is obtained from the rest of the sheets of the 'material that make up the body and the bottom of the bottles, respectively. In another variant of the method, for the manufacture of a second type of bottle grouping, it comprises the additional step of forming the grouping, by cutting the sheets of the material constituting the body and the bottom of the bottles, respectively. Those skilled in the art will appreciate that, thanks to the novel characteristics of the bottles disclosed in the present invention, they fully guarantee the tightness for the protection of their contents. In addition, the process of the present invention allows the manufacture by thermoforming and the final filling and closing of the bottles, in a totally continuous process, which consequently can give rise to modular machines and of much shorter length than the current ones, guaranteeing asepsis in operations and causing much lower operating costs. It will be appreciated that with all this, the present invention manages to satisfy the solution of the technical problem raised.

Brief description of the drawings. The following is a description of a preferred embodiment, although not exclusive, of the object of the present invention, for the best understanding of which is accompanied by drawings, given merely by way of non-limiting example, in which: FIG. 1 is an elevational view of a first embodiment of a bottle according to the invention; Fig. 2 is an elevation view in partial section of the bottle of Fig. 1, - Fig. 3 is a detail view, according to III of Fig. 2, illustrating the bottle in its closed position; Fig. 4 is a view analogous to that of Fig. 3, but in which the bottle is shown in its open position; Fig. 5 is a view, analogous to that of Fig. 2, of another embodiment of the bottle of the invention, partially sectioned by its embouchure; Fig. 6 is a detail view, according to VI -VI of Fig. 5, illustrating the bottle in its closed position; Fig. 7 is a view analogous to that of Fig. 6, but in which the bottle is shown in its open position; Figs. 8 and 9 are respective sectional views of another embodiment of a bottle according to the invention, which illustrates the particular case in which the bottle comprises a capsule provided with a pull tab and retainer, in two different positions; Fig. 10 is a partial sectional view of a capsule bottle according to another embodiment of the invention, illustrating the open position thereof; Fig. 11 is another view of the bottle of Fig. 10, but in which the bottle is in the closed position; Fig. 12 is a partial sectional view of a bottle with a screw cap according to another embodiment of the invention, illustrating the open position thereof; Fig. 13 is another view of the bottle of Fig. 12, but in which the bottle is in the closed position; Fig. 14 is a perspective view of another example of a bottle according to the invention, comprising a threaded neck provided for a closure with a screw cap; Fig. 15 is a perspective view of another example of a bottle according to the invention, comprising a sealing cap; Fig. 16 is a perspective view of a first embodiment of a grouping of integral bottles according to the invention, Fig. 17 is a perspective view of a second embodiment of a grouping of bottles according to the invention, linked by means of a connecting body, Fig. 18 is a schematic view in partial section, showing the phase of shaping the body of a bottle destined to be closed by a capsule, according to the method of the invention; Fig. 19 is a schematic view in partial section, showing the phases of shaping the bottle and simultaneously applying the capsule to it, according to the method of the invention, Fig. 20 is a schematic view and in partial section, which shows the phases of forming the body of a bottle intended to be closed by a screw cap, and simultaneously applying thereto a decorative band, according to the process of the invention Fig. 21 is a schematic and sectional view, illustrating the phase of forming the weakening and the portion of closure in a bottle intended to be closed by capsule; Fig. 22 is a schematic and sectional view, analogous to that of Fig. 21, illustrating the phase of forming the weakening and the closing portion in a bottle intended to be closed by a screw cap; Fig. 23 is a schematic view in partial section, showing the step of applying the screw cap to a bottle previously formed with an external thread in its neck; Fig. 24 is a schematic view showing the joint phases of heat sealing the bottom or base to a bottle to the body thereof, cutting the sheet into individual bottles and extracting the bottles; Fig. 25 is a schematic view showing the joint phases of thermosetting the bottom or base to a set of bottles and of trimming the sheet so that a group of bottles are joined together forming a grouping; and Fig. 26 is a schematic view illustrating the combined phases of thermosetting the bottom or base to a set of canisters and of trimming the sheet so that the bottles are separated individually, determining a cut to be used later for grouping from the same; Detailed description of the drawings. In said drawings it can be seen that the bottles 1, 10 of thermoplastic material disclosed comprise an essentially prismatic main body 2 molded in one piece, a bottom or base 5 and a mouth 3. In Figs. 2 to 14 it can be seen that the bottles 1, 10 according to the invention comprise a sealing portion 6 of the mouthpiece 3, which in the closed and full position of the bottle, as it comes from the factory, is molded in a single piece together with the body 2 of the bottle 1, 10. To facilitate the understanding of this explanation, Fig. 14 shows an example of bottle 1, whose closing portion 6 has been partially broken. Said closing portion 6 is delimited, as can be seen clearly in the details of Figs. 3, 4, 6 and 7, by a weakening 7 of the thermoplastic material constituting the bottle, practiced in adjacency to the periphery of the mouth 3. The weakening 7 is preferably in the form of a circumference, although it can also take the form of other curves different In addition, the weakening 7 can be in the form of an open or closed curve. The bottom or base 5 of the bottle 1, 10 is formed by a sheet of a thermoplastic material, which preferably is the same as that of the rest of the bottle 1, 10, that is to say that of the body 2 and the closing portion 6. The bottom 5 is joined to the lower portion of the walls of the body 2 of the bottle 1, 10 by heat sealing, after having filled the bottle with the product it must contain. With reference numeral 1 are designated embodiments of the bottle intended to be closed by a screw cap 8, of which particular illustrative examples are shown in Figs. 1 to 4 and 12 to 14. In this case, the closing by means of the screw cap 6 cooperates an additional external thread 9 of which the neck 4 of the bottle 1 is provided. The plug 8 is glued on its internal face to the face externally of the closing portion 6 by means of an adhesive or glue 11. Alternatively or in addition to the plug 8 and threaded 9, the bottles 1 of the invention can be closed by a capsule 12 constituted by a sheet material, preferably from a complex of inert metallized plastic, which is attached to the outer face of the closure portion 6 by means of an adhesive or glue 11. The embodiments of the bottles provided with capsule 12 are designated by reference numeral 10, and of which concrete examples are shown in Figs. 5 to 11 and 15. ^ Bottle 1, 10 can come from factory, filled and closed 5 arranged for the consumption of its contents, in the sealed position exemplified in Figs. 2, 3, 5, 6, 8, 9, 11 and 13. In order to open the bottle 1, 10, it is sufficient to exert on the closing portion 6 a tensile stress or pressure greater than a predetermined minimum force, so that the weakening 7 is broken totally or partially, the closing portion 6 of the mouth 3 being disconnected, and the latter remaining ^ open. In particular, in the case of the bottle 1 provided with screw cap 8 and threaded 9, the breakage of the annular weakening 7 occurs when the cap 8 is unscrewed, which pulls the closing portion 6 in its movement. possible thanks to the fact that the adhesion of the plug 8 to the closing portion 6 is greater than the shear breaking strength of the plastic material portion of the weakening 7. The result is 20 can see in Figs. 4 and 12. In the case of the bottle 10 provided with capsule 12, the breaking of the weakening 7 for the opening of the mouthpiece 3 is carried out by manually pulling the capsule 12. For this purpose, the capsule 12 is preferably provided with a tab traction 13 or a pull tab and retainer 35, which facilitates the operation. In Figs. 7 and 10 are two separate details that show the result of this pulling operation. In Figs. 8 to 11 show examples of embodiment of the bottle 10 provided with capsule 12, in which the weakening is in the form of an open arc, at whose ends a hinge is determined in the closing portion 6. In this case, the tongue of the capsule 12 assumes the shape of a tongue of traction and retention 35, so that, once the bottle 10 is opened by breaking the weakening 7, that can be closed again, folding the closing portion 6 back against the mouth 3 and covering the capsule 12 with the upper part of the bottle next to the embouchure 3. To facilitate it, the neck 4 of the bottle 10 comprises, in its part adjacent to the mouth 3, a slit 40 or an afferent formation, adapted to receive part of the pull-and-hold tongue 35 when it is manually pressed against the slit 40. In the examples of the bottles 1 and 10 shown in FIGS. 10 to 13 confer the optional and non-essential feature that, in extension of the neck 4, the bottles 1, 10 comprise a neck 36 that facilitates the exit of the contents of the bottle . In the case of Figs. 10 and 11, the bottle 10 is of the type that is closed by a capsule 12 provided with a pull-and-hold tab 35, while in the one of Figs. 12 and 13, the bottle 1 is one of those intended to be closed by a screw cap 8. In Fig. 16 is shown a set of bottles 1, 10 which are connected two by two by their bases through strips of junction 15, made without continuity solution with the material constituting the bottom or base 5 of the bottles 1, 10, giving rise to a grouping 14 of bottles. Each of the bottles 1, 10, in this case six, of the grouping 14 can be separated from the rest by breaking the connecting strips 15, for which the width of the strip 15 is small enough to facilitate its frangimiento. In Fig. 17 another alternative form of grouping 37 of a plurality of bottles 1, 10, in this case also six, according to the invention is shown. In this alternative form of grouping 37, the bottles 1, 10 are removably connected by means of a connecting body 24, constituted by two strips 38 of plastic material and a handle portion 26, in this example in an arched or "half-barrel" shape, which seamlessly links the strips 38. In the strips 38 there are holes 39, one for each bottle 1.10 , of similar diameters, although somewhat smaller, than that of a minimum diameter portion 41 of the bottle 1, 10 in the area adjacent to the neck 4 (see Figs 1 to 9). These portions of minimum diameter 41 can be constituted by a concavity formed in the body 2 or neck 4 of the bottle, or by the lower edge of a screw cap 8, such as in the case illustrated in FIG. 17 Each orifice 39 is provided on its periphery with four notches 25 of radial extension, which give the edge of the hole a certain flexibility or spring effect. The bottles 1, 10 are inserted through their neck 4, under pressure in the holes 39, the notches 25 facilitating the insertion, and being retained by the effect of tightening the edges of the holes 39 on the portions of minimum diameter 41 of the bottles 1, 10. In Figs. 18 to 26 illustrate different steps of the process, typical of the invention, of filling and closing bottles 1, 10 and of forming clusters 14, 37. Said method consists in the treatment of a sheet 16 of thermoplastic material, by means of the sequential phases indicated below: feeding the sheet 16 of thermoplastic material to a thermoforming machine; heating the sheet 16 to a temperature higher than that of creep of the thermoplastic material; - introducing a preform punch 17 into a negative mold 18 of the bottle 1, 10, located in the inverted position, with the sheet 16 of inter-thermoplastic material placed between the preform punch 17 and the negative mold 18 (Figs 18, 19, 20 and 23); forming the body 2 of the bottle 1, 10 by applying the thermoplastic material against the inner wall of the negative mold 18, by means of pressure or pneumatic depression, and extracting the preform punch 17 from the mold 18; forming the weakening 7 and closing portion 6, by splitting the thermoplastic material by means of a punch 19 (Figs 21 and 22). The punch 19 has the shape adapted to the desired conformation of the weakening 7: if it is annular, the punch 19 will be annular, whereas if it is in an open arc, the punch will consequently be in an open arc. - filling the bottle 1, 10 with the product 22 to be contained, by the upper opening 20 which will then be the bottom or base 5 of the bottle and which remains free by the withdrawal of the preform punch 17; and thermosoldering a sheet 21 of thermoplastic material to the periphery of said upper opening 20, the bottom or base 5 being determined and, therefore, finished and hermetically closed the bottle 1, 10 (Figs, 24, 25 and 26). In particular, Fig. 18 illustrates the stage in which the thermoplastic material is applied against the inner wall of the negative mold 18, by pressure or pneumatic depression. When the bottle 1 is of the type closed by the screw cap 8, the method comprises the step of applying glue or adhesive 11 between the inner face of the screw cap 8 and the outer face of the closing portion 6 of the screw cap 8. the mouth 3 of the bottle 1 and subsequently applying the cap 8 to the mouth 3.

The application of glue or adhesive 11 and plug 8 can be carried out simultaneously to the phase of shaping body 2 of bottle 1 (Fig. 23). For this, the mold 18 is split into two halves 33 and 34, of which a lower half 34 mobile receives, in a position separated from the upper half 33 and in a housing 42 for that purpose that is provided, the cap 8 , after which it is located in continuity with the upper half 33, in such a way that the cap 8 itself constitutes the bottom of the negative mold assembly 18. Thus, when the blowing or aspiration is carried out in the mold 18, the thread of the cap 8 it becomes the molding surface for the external threading 9 of the bottle 1. Alternatively, the phase of applying glue 11 and applying the plug 8 is carried out just after the phase of forming the weakening 7. When the bottle 10 is intended to receive a capsule 12, the process comprises the intermediate phase of applying the capsule by gluing 12 to the outer face of the closing portion 6. This phase of application of the capsule 12 can be simultaneous to the blowing or aspiration phase. This last case is the one shown in Fig. 19, where it is shown that the capsule 12 is formed by cutting by a shear 46 from a sheet 47 of an appropriate material, then forming the bottom of the mold negative 18 of the bottle 10.

For the formation of individual bottles 1, 10, after the phase of heat sealing the sheet 21 to the periphery of the upper opening 20 for the formation of the base or base 5, whether they are bottles provided with capsule 12 or screw cap 8 , the sheets 16 and 21 are subjected to a joint cutting operation, by the action of a cutting die 44, in which each shaped bottle 1, 10, filled and closed, becomes independent of the rest of the sheets 16, 21 of the material that constitute the body 2 and bottom 5 of bottles 10, 10, respectively. In Fig. 24 an example of such a joint operation is shown, applied in this case to bottles 10 with capsule 12, in which they are expelled from the line by an outlet conduit 43. In Fig. 25 the mode of formation of the groupings of bottles 14 of Fig. 16. In this case, the cutting die 44 has the appropriate configuration to separate from the sheets 16 and 21 a cut such that the bottles, which in the case illustrated there are six, they are joined by means of joining strips 15 that remain integral with the bottoms 5 of the bottles 1, 10. In FIG. 26, the conformation of the connecting body 24 for the formation of bottle groupings 37 is illustrated. Fig. 17. In the illustrated example, the step of separating by cutting each shaped, filled and closed bottle 1, 10 is carried out in such a way that the aforementioned joining body 24 is determined directly in the cutting operation itself, starting from of the excess of the sheets 16 , 21 that have not become part of the main body 2 or bottom 5 of the bottles.

Alternatively, the cutting phase for separating the bottles individually can result in a cutout different from that represented, whereby the connecting body 24 would be terminated by a subsequent cutting or stamping operation. The handle 26 can be shaped later in a final operation, for example by stamping with rollers, to give it the desired shape. A person skilled in the art will appreciate that, in addition to efficiently solving the technical problem of the present invention, the phases of the disclosed method can be carried out in modular, easily interchangeable stations. for the manufacture and filling of bottles 1, 10 of any type of closure and configuration. In this way, in a single machine, the manufacture of all types of bottles 1, 10 can be carried out, with only a few and easy disassembly and assembly operations of the modular stations involved in each case. Having sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is noted that everything that does not alter or modify its fundamental principle can be subject to variations of detail. In this regard, the method of the invention is capable of incorporating additional phases, such as, for example, the application of a decorative band 31 to the wall of the bottle 1, 10 (Fig. 20). In Fig. 20 the example is shown in which the application of the decorative band 31 is carried out simultaneously with the shaping phase of the body 2 of the bottle 1 provided with the thread 9. For this purpose, the negative mold 18 is a split mold in two halves 28, 29, of which the lower half 29, which houses the negative of the thread 9, is foldable to a position in which it receives inside the decorative band 31, formed by cutting by blade 32 from a roll 30, which may be printed. Also, bottles 1, 10 can take different forms different from those explained and illustrated by way of example and features that are technical equivalents of those claimed. The main thing, and why patent invention is requested, for twenty years, is what is glossed in the following claims.

Claims

1. Bottle (1, 10) of thermoplastic material, of the type comprising a main body (2) essentially prismatic molded in one piece, a bottom or base (5) and a mouth (3), characterized in that it comprises a portion ( 6) of sealing the mouthpiece, molded together with the body of the bottle forming a single piece with it, said closing portion being delimited by a weakening (7) of the material that constitutes the bottle, adjacent to the periphery of the embouchure and the bottom or base consisting of a sheet of a thermoplastic material solidly attached to the lower portion of the walls of the body of the bottle by thermowelding, after having been filled the bottle with the product it must contain, all adapted in a way that by exerting on the closing portion a tensile stress or pressure greater than a predetermined minimum stress, the weakening is liable to break down in whole or in part to separate the closing portion of the embouchure, in order to perform the opening of the embouchure.

2. Bottle (1) according to claim 1, characterized in that, being of the type comprising a screw cap (8), which cooperates with an additional external thread (9) that is provided with the neck (4) of the bottle, the plug is glued on its internal face to the external face of the closure portion (6) by means of an adhesive or glue (11), such that, when the cap is unscrewed, the weakening is broken (7) cancel.

3. Bottle (10) according to claim 1, characterized because it comprises a capsule (12) constituted by a laminar material, attached to the external face of the closing portion (6) by means of an adhesive or glue (11), such that when manually pulling the capsule, it is it produces the total or partial break 5 of the weakening (7).

4. Bottle (10) according to claim 3, characterized in that the weakening (7) has an open arc shape and the capsule (12) comprises a pull-and-hold tongue (35), so that, once the bottle is opened by rupture of the weakening, this can be closed again by reversing the opening movement of the closing portion (6) so that the capsule covers the formed mouthpiece (3).

5. Grouping (14) of bottles according to the preceding claims, characterized in that it comprises a plurality of bottles (1, 10) joined without continuity by its bottom or base (5) by strips of union (15) easily frangible, made of the thermoplastic material itself constituting the background 20 of the bottles.

6. Grouping (37) of bottles according to claims 1 to 4, characterized in that it comprises a plurality of bottles (1, 10) and a joining body (24) thereof, the joining body being constituted by strips (38) of plastic material and at least one portion of handle (26), which seamlessly links the strips, in which multiple holes (39) of diameter similar to that of the neck of the bottles, provided with notches (25) of radial extension in 30 its periphery, which give the edge of the holes a certain flexibility, all this so that the bottles can be inserted by pressure in the holes, being retained by effect of the tightening of the edges of the holes on the necks of the bottles.

7. Process for manufacturing and filling a bottle (1, 10) or grouping (14, 37) of bottles according to the preceding claims, characterized in that, starting from a sheet (16) of thermoplastic material, it comprises the steps of: - feeding the sheet of thermoplastic material to a thermoforming machine; heating the sheet to a temperature higher than that of thermoplastic thermoplastic material; introducing a preform punch (17) into a negative mold (18) of the bottle (1), placed in an inverted position, with the sheet (16) interposed between the preform punch and the negative mold; forming the body (2) of the bottle by applying the thermoplastic material against the inner wall of the negative mold, by means of pressure or pneumatic depression, and extracting the preform punch from the mold; forming the weakening (7) and the closing portion (6), by splitting the thermoplastic material by means of a punch (19); filling the bottle with the product (22) to be contained, by the upper opening (20) which will then be the bottom or base (5) of the bottle and which remains free by the removal of the preform punch; and thermowelding a sheet (21) of thermoplastic material to the periphery of said upper opening, the bottom or base being determined and, therefore, finished and hermetically closed the bottle.

8. Process according to claim 7, applicable to the bottle (1) according to claims 1 or 2, characterized in that it comprises the intermediate phases of applying adhesive or adhesive (11) between the inner face of the screw cap (8) and the face outside the closure portion (6) of the mouth (3) of the bottle and then apply the cap to the mouth.

9. Process according to claim 8, characterized in that the step of applying glue or adhesive and applying the cap (8) is carried out simultaneously to the phase of shaping the body (2) of the bottle (1), for which the cap itself constitutes the bottom of the negative mold (18), the screw thread forming the molding surface of the external thread (9) of the bottle.

10. Process according to claim 8, characterized in that the phase of applying glue and applying the plug (8) is carried out just after the phase of forming the weakening (7).

11. The method according to claim 7, applicable to the bottle (10) according to claims 1 or 3, characterized in that it comprises the intermediate phase of applying by gluing the capsule (12) to the external face of the closing portion (6).

12. Process according to any of the preceding claims, characterized in that, after the thermo-welding phase, it comprises the step of separating by cutting each pot (1, 10) formed, filled and closed, from the rest of the sheets (16, 21) of the material constituting the body (2) and the bottom (5) of the bottles, respectively.

13. A method according to claim 12, particularly applicable for the manufacture of the grouping (37) of bottles (1, 10) according to claim 6, characterized in that the step of separating by cutting each shaped, filled and closed bottle (1, 10) is performed so that the connecting body (24), comprising a handle (26) is obtained from the rest of the sheets (16, 21) of the material that make up the body (2) and the bottom (5) of the bottles , respectively.

14. Process according to claims 7 to 11, particularly applicable for the manufacture of the grouping (14) of bottles (1, 10) according to claim 5, characterized in that it comprises the additional step of forming the grouping, by cutting the sheets (16, 21). ) of the material that make up the body (2) and the bottom (5) of the bottles, respectively. SUMMARY Thermoplastic material bottle and procedure for manufacturing and filling it. The bottle is in one piece and comprises a main body (2) with a sealing portion (6) delimited by a weakening (7) of the material adjacent to the periphery of the mouthpiece. The bottom is constituted by a sheet of a thermoplastic material joined to the body of the bottle by thermowelding. The bottle is closed with screw cap (8), or a capsule (12), which are attached to the closure portion (6) by means of an adhesive or glue (11). The method comprises the steps of feeding a thermoplastic sheet to a thermoforming machine; heating the sheet to a predetermined temperature; introducing a preform punch (17) in a negative mold (18) of the bottle (1), placed in an inverted position, with the sheet (16) interposed between the punch and the mold; forming the body (2) of the bottle by means of pressure or pneumatic depression; forming the weakening (7) and the closing portion (6) by means of a punch (19); filling the bottle with the product (22) to contain, through the upper opening (20) which will then be the bottom of the bottle; and thermowelding a sheet (21) of thermoplastic material to the periphery of said upper opening, whereby the bottom or base is determined and, therefore, finished and hermetically closed the bottle.