CS248249B1 - PVC composition for food packaging seals - Google Patents

Abstract

PVC composition for food packaging seals, especially for sealing inserts of crown caps of beer, lemonade, syrups and mineral water bottles, produced by extrusion technology and subsequent die shaping. The purpose of the solution is to improve the processing and functional properties of the PVC composition, aimed at the possibility of processing at reduced temperatures and lower melt pressures, meaning savings in electricity and machine maintenance costs, improved thermal stability and improved sealing capabilities at pressures higher than 0.6 MPa. The essence of the solution lies in the fact that only such PVC compositions are used in which the ratio of PVC and/or VC copolymers to plasticizers and fillers is equal to 1: 0.6 : : 0.1 to 1:1: 0.8, while the K- -values of polymers and the content of comonomers are defined. Of the fillers used, 3 to 20 wt. % calcium carbonate and 0.5 to 8 wt. % titanium dioxide, calculated on the weight of the PVC composition. The necessary distribution of particles of these two fillers is also defined. The invention can be used effectively also in medical technology for the production of parts of limb prostheses, for sports and rehabilitation aids, toys for infants, etc.

Description

248249

BACKGROUND OF THE INVENTION The present invention relates to a PVC composition intended to provide sealings for food container closures having improved process and functional properties compared to previously used PVC materials.

Crown cap sealants, mineral water, syrups, lemonades, etc. have evolved quite long. In the first stage, they used gaskets made of natural cork, die-cut from cut approximately 2 mm thick slices. In this case, inserts having cracks and other defects had to be displaced, so that the waste was large and no longer usable. In order to utilize this waste, they began to dig into small pieces of about 1 to 2 mm in size, and after the addition of binders, most often phenol-formaldehyde resins, the hot pressing dies suitable for punching with multi-insert dies. This technology, supplemented with a stick of polyethylene or aluminum foil, is still used in many places.

An important step forward was the use of PVC paste, i.e. a PVC powder dispersion of suitable softeners with the addition of a blowing agent. The paste was sprayed with a special machine in a precisely metered dose (0.3 g) into rotating metal coulters, which were then passed through a glazing tunnel to form gelatinous paste and sudden foaming of the gelatin to form a soft, elastic seal. sealing capabilities up to a pressure of 0.6 MPa.

The disadvantage of this process, however, is the frequent failure of the device, caused by the closest injections of the injection nozzles as well as the total impurities coming from the belt or from the corrosion of the apparatus, and the apparatus must be shut down and the fault spot cleaned with organic solvents. There is a strong contamination of the workers' lines operating the line and the skin contact with the organic solvents, which ultimately leads to the sensitization of allergic dermatoses and the need to change the workplace. Another serious drawback is the marked increase in paste viscosity with the storage time, which limits the shelf life and usability of the paste for only 3 to Θ months. The increase in viscosity is particularly noticeable in the summer months, when stored in non-tempered warehouses, resulting in a losing fluidity loss and hence usability.

A great benefit in the technology of corrugated liner inserts was the inventing of a device for their production of granular material - plastic, and in the same way that a full circle profile is extruded from the granulate on the extrudate extractor, from which masses are cut off by a rotating knife. about 0.3 g and falls into the inserted crowns, where the desired shape of the gasket is formed in the carousel device with the punching device.

Initially, this device was used for processing polyethylene and late EVA copolymer. However, both plastics have a considerable disadvantage in high permeability to CO2 and water vapor and therefore their use has been limited to practically only the co-valves for edible oils and syrups.

Other heights and the search for more suitable materials, especially for beer, sparkling beverages, lemonade and carbonic mineral water, brought about a shear A of 80 ° Sh. Sealing liners of this material gave identical but even better sealing properties (up to 0.8MPa) than PVC paste inserts. The best controllable and high performance of the equipment (500 to 1500 pieces of seam seal) for small space demanding clean, easy operation. Compared to the previously processed polyethylene or EVA copolymer, the viscosity of the melt has been increased by several times in the PVC, resulting in a substantial mechanical stress on the extruder with a frequent failure rate of the worm and drive train. Also, the low thermal stability of the PVC composition, even with a short interruption (shutdown) of the inserts, resulted in the decomposition of the PVC in the extruder, coupled with the depletion of the material to be treated and the strong corrosion of the worm formed by the hydrogen chloride, which necessitated the replacement of the worm every year. The more expensive energy demands and costly maintenance, the PVC granulate was priced as compared to PVC paste, better sealing capabilities and long-term shelf life without compromising quality.

We have now found that it is also possible to eliminate these shortcomings of the PVC composition and to obtain processing properties on aripolyethylene in improving the functional properties when the PVC composition is assembled and manufactured according to the invention described herein, thereby simultaneously obtaining: a reduction in melt viscosity 30 to 50%, and thus significantly less mechanical stress on the extractor, with savings on spare parts, - Possibility of processing the PVC composition at substantially lower temperatures (by 20 to 30 ° C), even lower than polyethylene, which means energy savings of 10 to 10%. 30 ° / o, - improving the thermal stability 11a to twice the previously known PVC crown cap compositions, which represent significant material savings, especially in the various technologically necessary short-term 248249 shutdowns (e.g. in the case of electric current failure, crown feed failure) ka-extrusion of the extruder, etc.) without melt-proofing and the need to disassemble the extruder, clean up the burnt-out and re-start, - improve the chopping off of the cuttings by the rotating knife, without sticking to the knife and without pulling out the melt-flowing filaments, - improving the sealing ability of the produced gaskets of 0.6 MPa to 1.2 MPa, which allows trouble-free use in cases where pasteurization and long-term storage of high CO2 content beverages is required.

The principle of the invention is that in the PVC composition consisting of PVC and / or copolymers of VC, plasticizers, fillers and auxiliaries, the ratio of PVC and / or VC to copolymers and conglomerates is selected from 1: 0.6: 0.1 to 1: 1: 0.8 is guaranteed to have a sufficiently low viscosity in the toughest cases, and processing at relatively low temperatures is possible. The proportion of PVC and / or copolymers of VC is preferably 35 to 55% by weight, the proportion of softeners is 31 to 35% by weight and the proportion of fillers is 6 to 25% by weight. % calculated from the weight of the PVC composition. From the point of view of achieving optimum properties of the PVC composition, the vinyl chloride homopolymer of K-value of 55 to 65 and / or K-propylene copolymer of 55 to 65 containing 2-7% propylene is chosen as PVC suspension homopolymer. and / or a VC-ethylene-vinyl acetate copolymer having a K-value of 60 to 70 containing 3 to 9% of ethylene and 2 to 7% of vinyl acetate, and / or a copolymer of C-alkyl acrylate K-values of 60 to 70, with 4 to 10% alkyl acrylate, wherein the alkyl acrylate may be a methyl, ethyl, etc., to dodecyl acrylate, preferably 2-ethyl-hexyl acrylate. The choice of plasticizers is primarily limited by hygienic and medical guidelines to the plastic coming into contact with foodstuffs. Their content is determined by a directive on a total of 35 wt. % and controlled with ethyl ether extract. In connection with the desired mechanical properties of the PVC composition, di-2-ethylhexyl phthalate, di-2-ethylhexyladipate, dibutyl sebacate, dioctyl sebacate, acetyltributyl citrate, soybean oil butyl ester, epoxidized soybean oil and the like can be used.

In particular cases, reactive wetting agents such as tetraethyleneglycol dimethacrylate or trimethylol propane trimethacrylate may be used to improve resistance to permanent deformation, provided that it reaches during gelation, or in a convenient manner, their complete interaction, in planar form, or in space. so that they will not be in the ethyl ether extract.

Fillers which have to be used in a particularly fine-grained form have a very important role in this invention. Suitable such fillers for such a PVC composition are naturally or synthetic calcium carbonates, titanium dioxide, alumina, annealed kaolin, talc, barium sulphate in the purity of C.sub.2 and the like.

The condition for selecting the kind and amount of fillers according to the invention is that the total weight of the PVC composition is from 3 to 20% by weight of calcium carbonate. % and titanium dioxide 0.5 to 8 wt. %. Said calcium carbonate content, in conjunction with a wetting agent, causes the thixotropic character of the melt of the PVC composition, and thus its great formability, and also has a substantial contribution to improving thermal stability. For blowing agent compositions, calcium carbonate serves as a nucleating agent at the same time, forming nuclei of the fine-porous structure. In turn, the titanium dioxide significantly improves flow properties and adjusts the color of the gasket.

These properties, however, appear to a sufficient degree only in a certain range of particles of these fillers. Accordingly, at least 90 wt. % of particles smaller than 0.025 mm, but the proportion of less than 0.001 mm must not exceed 255 wt. %. Titanium dioxide, in turn, must have at least 95 wt. % of particles smaller than 0.015 mm, a particle size of less than 0.001 mm of at least 40 wt. %, but not more than 10 wt. %.

Typical distributions of suitable commercial fillers are shown in Table 1. 248249 7

Table 1

Filler 1% particles above 0.025 mm 0% particles 0.016 to 0.025 mm 0.1% particles 0.010 to 0.016 mm 13.0 '% particles 0.004 to 0.010 mm 49.4% particles 0.001 to 0.004 mm 35.8% particles 0.0002 up to 0.001 mm 1.7% particles below 0.0002 mm 0 Legend: 1 is Kredafil 150 Extra S 2 is micronised limestone 3 is Omya BSH

4 is Omyalite S

5 is Omyalite 95 T 6 is TiTo Pretiox AV-01 8 2 3 4 5 6 0 0 0 0 0 0 0 0 0 0 7.9 0 0 0 0.6 32.9 18.3 3.3 5.3 6 , 4 54,7 73,2 81,4 72,0 22,7 29,2 4,5 8,5 15,3 61,9 0 0 0 0 1,9 When selecting fillers, the distribution of particles from the inlet must be taken into account in order to preserve the total surface area of the particles of the intended purpose which the filler has in the PVC composition. Exceeding these values, as far as the upper limit, ie the higher bold content, results in an inadequate effect on thixotropy, while increasing the fines above the stated limits of the science by increasing the absorbency of the surface of the filler particles and thus the desired change in mechanical properties, in particular an increase in hardness and decrease in tensile strength below acceptable load. Therefore, a finer titanium dioxide limited to 8 wt. % Of the PVC composition, while calcium carbonate with a smaller total particle size can be dosed up to 20% by weight of the PVC composition. Calcium and zinc salts of higher fatty acids such as calcium stearate, calcium oleate, zinc stearate, zinc octoate, beta-amine-nocrotone esters or complex potassium-zinc salt may also be used as stabilizers. oleic acid, which at the same time can serve as a very effective blowing agent activator if this is used to reduce the density of the sealing liner.

In order to avoid sticking of the melt of the PVC to the forming tools (nozzle, knives, dies), a lubricant composition is needed in the PVC. Most often, the multi-component system consists of a frictional heat reducer (a viscosity lowering agent), a separator and a speed gelatinizer, for example, pentaerythritol dioleate with solid paraffin and calcium stearate, or glycerin monostearate with medicated petrolatum and polypropoxamer trimethylolpropane. Even these auxiliaries must be carefully selected not only in terms of functionality, but also in accordance with the hygiene guidelines in terms of quantity and quantity.

In particular, the application possibilities and advantages of the present invention will be explained in more detail by way of example, with Example 1 serving as a comparative, typical PVC molding composition used for crown caps with extrusion technology, and Examples 2 to 7 refer to PVC Combinations of the Invention, with Significantly Improved Processing and Functional Properties, as exemplified by the values of the observed properties.

The individual properties were determined by the following methods: density according to CSN 4 0111 pyknometric-Ry, tensile strength and ductility according to CSN64 0605, using test specimens no. Io thickness 2 mm and speed 100 mm / min,

hardness Shore A according to ČSN 62 1431, flow index according to ČSN 64 0861 at 190 ° C and force on piston 3 kg, thermal stability on congo-red at 180 degrees C according to DIN 53381/1.

The workability test was performed with a Got-fert capillary viscometer, 0 22, at a melt temperature of 187 ° C (zone temperatures 160, 170, 180 ° C) and 100 rpm, nozzle utilization of 02 mm / 3 mm and screw with compression ratio 1: 3. The empirical processability factor was calculated as the proportion of the discharge power G (g / h) per unit of melt pressure (MPa) and torque unit (Nm).

The pressure tests of the sealing capability of the cork caps with the manufactured gaskets were carried out on a machine with 6 metal beer bottle models immersed in a tempered water bath and provided with the supply of carbon dioxide from the pressure bottle through a pressure reducer allowing precise pressure adjustment in the model 248249 bottles closed with tested closures.

Pressure tests were made when bathing at 25 ° C, in the second series at 65 ° C, when passaging conditions were modeled. The pressure in the test flasks increased by 0.1 MPa to -1.2 MPa every minute. Dual pressure sealing capability was considered satisfactory by the acneebole observed in a water bath leaking CO2 bubbles from the crown cap. Example 1

This example shows the current state of the art and serves as a comparison.

For the production of sealing caps for crown caps on a beer bottle, a PVC composition of: 61.8 wt. % suspension PVC of K-value 70, 2.0 wt. % of titanium white, 33.6 wt. % di-2-ethylhexyl phthalate, 1.2 wt. % beta-amino-crotonic ester, 0.3 wt. % calcium zinc carboxylate, 0.1 wt. % of tris-nonylphenyl phosphite, 0.5 wt. % wax OP, 0.3 wt. % O stearyl alcohol and 0.2 wt. % glycerin monostearate. The composition is blended in a fluid mixer and then granulated on a dual-walled granulator at the temperature of the heating zones 120, 135, 140, 150, 150, 140 and 145 ° C. The granular PVC composition has the following properties: density 1.238 g / cm 3, tensile strength 18.0 MPa, ductility 142%, hardness 80 ° Sh A, flow index 16.2 g / 10 min, thermal stability 105 minutes.

The thread capillary viscometer test gave a performance of 2736 g / h at a pressure of 9.5 MPa and a torque of 22.5 N.m, resulting in a process factor of 12.8.

The granulate is processed on a single-screw extruder. A full circle of 8 mm is extruded from which approximately 300 mg of cuttings are cut off by a rotating knife and the crown crowns are dropped, where they are immediately formed into the desired shape of the sealing insert by the forming dies.

The required machine performance and formabilityPVC compositions were achieved under the following conditions: zone temperature 150, 160, 170, 160 ° C, at 110 revolutions of screw per minute - el. The current consumption of e-10 electric current is 0.739 kWh per kg of processed granulate.

The gaskets produced with a weight of 295 to 310 mg were subjected to sealing capability tests, with the following results: gas leakage at 25 ° C at 6 ° C, two closures at 0.7 MPa, at 0.8 MPa was observed at 6 ° C one closure, at 0.9 MPa for two closures and at 1.0 MPa for one closure.

Pressure above 1.0 MPa could not seal and one of the closures tested. At 65 ° C, 3 closures did not seal at 0.7 MPa, 2 closures at 0.8 MPa, and the last test cap showed no leakage at 0.9 MPa. It follows that pasteurization can be carried out using crown closures with these sealing liners only at internal pressures in the bottles of up to 0.6 MPa, and the abovementioned capacities are only at the values obtained by the sealing liners made of PVC pastes. Example 2

For the production of gaskets of crown caps on a beer bottle, a PVC composition of the present invention is prepared with a PVC: plasticizer: filler equal to 1: 0.636: 0.135 consisting of: 54.16 wt. % suspension PVC of K-note 62, 7.30 wt. % of fillers, of which 3.30 wt. % calcium carbonate in the form of a surface treated float having 99.9 wt. % of particles smaller than 0.025 millimeters and 1.7 wt. % of particles smaller than 0.001 millimeters and 4.00 wt. % of titanium dioxide having 99.9% by weight of particles smaller than 0.015 mm, 73.0% by weight; % of particles smaller than 0.001 millimeters and 1.8 wt. % particles below 0.0002 mm, further 0.24 wt. % of blowing agent - azobisformamide, 0.24 wt. % zinc activator, 0.30 wt. % calcium zinc carboxylate, 1.00 wt. % beta-amino-crotonic ester, 0.48 wt. % stearin, 0.60 wt. % calcium stearate, 0.48 wt. % solid paraffin, m.p. 53 degrees C, 0.20 wt. % glycerin monostearate, 248249 11 12 32.50 wt. % di-2-ethylhexyl phthalate, 2.00 wt. % of an epoxidized soybean oil ester, 0.20 wt. % castor oil, 0.02 wt. % medical vaseline oil, 0.10 wt. % tris-nonylphenyl phosphite and 0.02 wt. % of the trilomethylolpropane molar polypropoxamer. weight 3,000. PVC composition bare after mixing zeroed at 90, 110, 115, 125, 130, 135, 130 ° C.

The granulated PVC composition has the following properties: density 1.527 g / cm 3, tensile strength 9.8 MPa, elongation 159%, hardness 74 ° Sh A, flow index 59.1 g / 10 min, thermal stability 149 minutes.

In the workability test, the measured power was 2 970 g / h, at a pressure of 6.1 MPa and a spinning torque of 14.5 N.m, giving a factor of 33.8.

Seal inserts of this PVC composition made on the same apparatus as described in Example 1, but more satisfactory temperatures and screw turns to achieve the same power, namely 120, 135, 150 and 140 ° C at 100 rpm and pulling 30 A. The specific electricity consumption is 0.633 kWh / kg, which is 14.4% less than in Example 1.

In the pressure sweep of the sealing capability of such produced crown caps by the tightness of the seal 304 to 328 mg, it sealed all 6 test closures at 25 ° C even at a pressure of 1.1 MPa. The pressure test at 65 ° C gave the same result - all seals sealed up to a pressure of 1.1 MPa, which is significantly better than in Example 1. This PVC composition thus showed workability at temperatures of 30 to 40 ° C lower, less energy-intensive and significant better-functional-sealing properties . Example 3

For the production of crown seal liners for bottles of beer, syrups, lemonades and mineral waters, a PVC composition of the present invention is prepared with a PVC spreader to form a 1: 0.63: 0.179 softener to 100 kg, consisting of: of 54.0 kg of PVC suspension, 62, then 8.7 kg of fillers, of which 6.7 kg of calcium carbonate with a surface finish having a 99.99 wt. % of particles less than 0.025 mm and 12.2 wt. % of particles smaller than 0.001 mm and 2.0 kg of titanium dioxide with a particle size distribution as in Example 2, followed by 0.25 kg of azobis-formamide, 0.30 kg of calcium stearate, 0.30 kg of solid paraffin with bt 52 ° C, 1.50 kilograms of beta-amino-tartaric acid ester, 32.00 kilograms of di-2-ethylhexyl phthalate, 2.00 kilograms of epoxidized soy esters, 0.25 kilograms of potassium-zinc icarboxylate and 0.70 (kg of pentaerythritol dioleate.

The mixed PVC composition is granulated at temperatures of 80, 100, 115, 125, 130, 130, 130 degrees C and its properties are as follows: density 1.265 g / cm 3, tensile strength 10.6 MPa, ductility 179 ° / o, hardness 69.0 ° Sh A, flow index 87.5 g / 10 min and thermal stability 252 min.

In the workability test, a yield of 3072 g / h was determined, at a melt pressure of 4.2 MPa and a torque of 12.9 N.im., a workability factor of 50.7, i.e. more than 4 times better compared to the composition of Example 1.

The granulated PVC composition is used to form crown-seal gaskets on the apparatus described in Example 1, except that extruder temperatures of 110, 125, 135, 130 ° C, screw speed 78 / are required for the desired performance and good formability. min, and the load is only 27 A, with a specific power consumption of only 0.570 kWh / kg of processed PVC com- ponent, ie up to 23% less than in Example 1. • Seals made of 275 to 284 mg in the pressure test sealed in all cases up to a pressure of 1.2 MPa, as high as 25 ° C, as well as at 65 ° C, which is twice the useful pressure achieved in the comparative PVC composition of Example 1, and shows very good functional performance the properties of the PVC composition according to the invention also at the temperature of pasteurization. Example 4

For the production of sealing rings of thermally insulating beverage bottles (thermos) according to the present invention, a PVC composition having a PVC ratio to filler filler composition of 1: 0.914: 0.645 is prepared with this weight: 37.2% by weight. % suspension PVC of K-note 62, 24.7 wt. % of fillers made up of 19.7 wt. % of the surface treated carbonate-calcium equal distribution of particles of Example 3 and 5.0 wt. % of titanium dioxide with the same particle size distribution as in Example 2, furthermore 0.65 wt. % azobisformamide, 0.30 wt. % of calcium stearate, 0.30 wt. % Solid paraffin with m.p. 54 degrees C, 248249 13 14 1.50 wt. % beta-amino-crotonic ester, 32.0 wt. % di-2-ethylhexyl phthalate, 2.0 wt. % of the epoxidized soybean oil ester, 0.65 wt. % potassium zinc carboxylate and 0.70 wt. % pentaerythritol dioleate.

The blended PVC composition was granulated at temperatures of 90, 100, 115, 120, 130, 130, 125 ° C and the following properties were found: density 1.477 g / cm 3, tensile strength 5.48 MPa, elongation 126 ° / °, hardness 53.0 ° Sh A, flow index 162.8 g / 10 min, heat stability 172 min.

In the workability test, the measurement power is 3048 g / h, with a melt pressure of 2.9 MPa and a torque of 9.5 N.:m, giving a factor of 110.6. The granulated PVC composition was processed on an injection molding machine at temperatures of 140, 150, 160, 160 ° C, by injection into a 6-fold mold, with a cycle of 45 seconds. The weight of the sealing ring was an average of 6.3 grams. With tightness on thermos flasks all. 10 randomized squeezed seals perfectly throughout the 24-hour trial period. EXAMPLE 5 A PVC composition with a ratio of PVC and copolymers VC to plasticizer to filler equal to 1: 0.626: 0.292 is prepared according to the present invention for the production of sealing caps for crown cap bottles for non-alcoholic beverages with high CO2 content. this composition: 10.6 wt. % of the suspension PVC by K-hoid-note 56, 15.0 wt. % of a C-propylene O-copolymer of 59 with a content of 3.5% propylene, 25.0 wt. % copolymer of vinyl chloride-2-ethylhexyl acrylate having a K value of 66 with a content of 8% of 2-ethylhexyl acrylate; % fillers consisting of 14.3 wt. % by weight of the milled limestone having 99.8 wt. % of particles smaller than 0.025 millimeters and 4.5 wt. % of particles smaller than 0.001 millimeters, and D, 5 wt. % of titanium dioxide with the particle size distribution given in Example 2; % Of calcium stearate, 0.8 wt. % beta-amino-crotonic ester, 20.0 wt. % di-2-ethylhexyl phthalate, 10.0 wt. % di-2-ethylhexyladipate, 1.7 wt. % of epoxidized soybean oil, 0.30 wt. % of medical vaseline oil and 0.9 wt. % pentaerythritol dioleate.

Mixed and granulated PVC compression has the following properties: density 1.306 g / cm 3, tensile strength 6.65 MPa, elongation 124 ° / o, hardness 64.1 ° Sh A, flow index 126.6 g / 10 min, thermal stability 210 minutes.

A workability factor of 66.6 is given in the workability test at 2988 g / h, at a melt pressure of 3.8 MPa and a torque of 11.8 N.m.

The processing of the granulate into the sealing liner was carried out under the same conditions as in Example 3. In pressure tests, all test closures sealed up to 1.2 MPa at 25 ° C at 65 ° C. Seals have good elasticity even at temperatures of about 0 ° C. Example 6

For the production of crown cap sealing inserts for strong carbonic minerals, a PVC composition of this invention is prepared with a PVC to softener ratio of 1: 0.68: 0.24 of this composition: 50.0 wt. % of suspension PVC by K-note 60, 12.5 wt. % fillers consisting of 10.0 wt. % of the particle size distribution of the micronized limestone of Example 5 and 2.5 wt. % of the titanium dioxide with the particle distribution given in Example 2, 0.2 wt. % solid paraffin, 0.3 wt. % of calcium stearate, 0.1 wt. % stearin, 0.4 wt. % glycerin monostearate, 0.6 wt. % azobisformamide, 22.0 wt. % di-2-ethylhexyl phthalate, 10.0 wt. % tetraethylene glycol dimethacrylate, 0.1 wt. % dicumyl peroxide, 0.1 wt. % Medical Vaseline Oil, 0.3 wt. % pentaerythritol dioleate, 0.6 wt. % of potassium zinc carboxylate and 2.0 wt. % of the epoxidized soybean oil.

The blended PVC composition is granulated at temperatures not exceeding 140 ° C and other properties: density 1.279 g / cm 3,

Claims (4)

Strength 24.5 MPa, elongation 180 ° / o, hardness 71.9 ° Sh A, flow index 46.3 g / 10 min, thermal stability 165 min. The processing of the gaskets was performed under the conditions given in Example 2. In the pressure tests, a sealing capacity of up to 1.5 MPa at 25 ° C at 65 ° C was achieved. EXAMPLE 7 To produce puncture sealing membranes on a physiological saline bottle, a PVC composition according to the present invention is prepared with a proportional co-polymer to a filler equal to 1: 0.81: 0.55 of this composition. : 20.0 wt. % of a VC-propylene copolymer OK of 58 with 2.8% propylene, 22.0 wt. % C-ethylene-vinyl acetate co-polymer with a K value of 68 containing 3.9% of ethylene and 3.1% of vinyl acetate, 23.1 wt. % of fillers, of which 15.0 wt. % of the particulate calcium carbonate with the particle distribution of Example 3, 3.1 wt. % of the titanium dioxide with the particle size distribution given in Example 2 and 5.0 wt. % of calcined kaolin, further 0.8 wt.% calcium stearate, 1.3 wt. % glycerin mono stearate, 0.3 wt. % solid paraffin with m.p. % ethyltrbutylcitrate, 10.0 wt. % di-2-ethylhexyl adipate, 16.0 wt. % of epoxidized soybean oil and 0.5 wt. O / o meidicinal-vaseline oil. The granular PVC composition has the following properties: density 1.340 g / cm 3, tensile strength 6.1 MPa, ductility 137%, hardness 59 ° Sh A, flow index 137.5 g / 10 min, thermal stability 128 min. In the workability test, a yield of 2928 g / h was achieved, with a melt pressure of 3.4 MPa and a torque of 10.7 Nm, a workability factor of 80.5 was obtained. membranes under the conditions set forth in Example 4. The membranes produced showed good long-term sealing ability and did not affect the negative properties of the infusion solutions. In Examples 2 to 7, the application of the invention is not limited or limited in any way. Other useful applications include: the production of spiked toys for young children, the most infants, some household items, sports and rehabilitation treatments, some parts of limb prostheses, and the like. The PVC compositions of the present invention are capable of being processed by extrusion, injection molding, calendering, and molding, indicating a wide range of preferred applications. OBJECT What is claimed is: 1. A PVC composition for food packaging seals having improved processing and functional properties, consisting of PVC and / or VC, copolymers, fillers and excipients. characterized in that the content of PVC and / or the copolymers VC is relative to the content of the softeners and the content of fillers in the weight ratio of 1: 0.6: 0.1 to 1: 1: 0.8, with The PVCa or VC copolymers are preferably 35 to 55 wt. %, the proportion of softeners is preferably 31 to 35 wt. % and the filler proportion is preferably 6 to 25 wt. ° / o of the weightPVC iComposition. : 2. Wherein the a-co-PVC and / or the VC copolymer utilizes a suspension homopolymer of vinyl chloride of 55-65 and / or a VC copolymer. -propylene having a K-value of 55 to 65 containing 2-7% propylene and / or a VC-ethylene-vinylacetate copolymer of 60% of the invention to 70 with 3-9% ethylene and 2-7% vinyl cetate and / or a VC-alkyl acrylate copolymer having a K-value of 60 to 70 with 4 to 10% alkyl acrylate, preferably 2-ethyl-hexyl acrylate. 3. A PVC composition for food packaging seals of the type 1 and 2, characterized in that calcium carbonate is 3 to 20% by weight of the fillers used. % and titanium dioxide 0.5 to 8 wt. % of the weight of the PVC composition. 4. A PVC composition for food packaging seals according to claim 1, wherein the calcium carbonate has at least 90 wt. % of particles less than 0.025 mm in size and particles of less than 0.001 mm in particle size do not exceed 25 wt. %, and the titanium dioxide has at least 95 wt. % of particles smaller than 0.015 mm, while at least 40 wt. % and particles less than 0.0002 µm-mesh of more than 10 wt. %. Severografla, n. P., Závod 7, Most Price 2,40 Kčs