CS271274B1 - Mixture for preparation of self-adhesive fixation packing foil on base of polyolefins - Google Patents

Abstract

The purpose of the mixture for the preparation of the auto-adhesive polyolefin-based fixation packaging foil is to increase the auto adhesion of packaging foils. The above-mentioned purpose is achieved by the use of 90 to 99.8 % by weight of polyolefin and 0.2 to 10 % by weight of chlorinated paraffin containing 5 to 75 % by weight of chlorine. The mixture for the preparation of the auto-adhesive polyolefin-based fixation packaging foil, with a controlled diffusion of an adhesive agent, can be applied to the packaging technique industry.

Description

BACKGROUND OF THE INVENTION The present invention relates to a composition for the preparation of an autoadhesive fixation coating film based on polycells.

The previously known autoadhesive fusible packaging films are made on the basis of polymers such as polyethylene (low- and medium-density types), polypropylene, polyvinyl chloride, respectively. copolymers such as an ethylene-vinyl acetate copolymer, by additivating agents that provide repeated autoadhesion when the film is pressed. A known autoadhesive additive is, for example, polyvinyl butyral, which is present in an amount of 0.05 wt. %, but the autoadhesion of the film prepared from the resulting mixture is relatively low. Increasing the autoadhesion of polyethylene films can also be achieved by adding 1 wt. % Glycol glycol glycol, respectively. of propylene oil to polyethylene. Autoadhesion of the resulting films does not exceed ДН.ст “ ¹ . Polyethylene modification 5 wt. % of the atactic polypropylene increases the autoadhesion of the films. However, the necessary autoadhesion is achieved over a longer period of time) □ the physico-mechanical properties of the films are not satisfactory.

Chlorinated paraffin containing 5 to 75 wt. X of chlorine is used as an additive to the anti-tumor oil. It is known to be used in various plastics, e.g. polyethylene, polypropylene, polystyrene, polyurethanes as flame retardants [Iaučík, P., Krivo.Šík, 0., Náplava, A., Ondrejmiška, K. _t Špilda, I., Špirk, E., Vorošová, M .: Additives to plastov, Alfa, Bratislava, p. 288 (1985)}, cold forming metalworking lubricants and secondary plasticizer in the processing of polyvinyl chloride.

The above-mentioned disadvantages are substantially eliminated by the composition for the preparation of the polyolefin-based self-adhesive fixative packaging film, which consists in the fact that the composition consists of 90 to 99.8% by weight. X of polyolefin and 0.2 to 10 wt. X of chlorinated paraffin containing 5 to 75 wt. X chlorine. ^x

The advantage lies in the preparation of the polyolefin-based self-adhesive fixation film and its simplicity, good workability, economic advantage over the films used hitherto and the fact that no change in technology or modification of the existing film production equipment is required.

The stagnant adhesion effect was achieved according to the proposed solution due to the physical compatibility of the additive under consideration with the polymer matrix, which makes it possible to achieve that even a small amount of additive applied in the mass which still does not impair the physical-mechanical properties of the film especially increase autoadhesion.

-ri-rlad 1

02, g of chlorinated paraffin containing 5 wt. X chlorine is added to 99.0 g of granulate r: c. Pelyethylene, mixed at 170 ° C in an extruder and by means of a slit extruder _. A foil of 0.04 mm thickness is prepared. The autoadhesion of the film is 13.2 N.cm &^lt; ^{1 &gt};.

Fri-2

The procedure is as in Example 1, except that 2 g of chlorinated para is used in addition to 98 g of branched polyethylene granulate. The autoadhesion of the film is 16.5.

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Example 3

The procedure is as in Example 1, except that 10 g of the chlorinated solution is used in addition to 90 g of branched polyethylene granulate. Autoadhesion of the prepared film J 1>, C NC / ¹ .

r r i -1 and d 4

The procedure is as in Example 1, except that chlorinated paraffin with a 75 µm cpm is used. X chlorine. The autoadhesion of the prepared film is 16.0 N.cm ^-1 .

CS 271 274 B1

The procedure was as described in Example 4, except that 2 g of chlorinated paraffin and an acre of 9B g of branched polyethylene granulate were used. The autoadhesion of the prepared film is 12.5 N.co ~ 1.

Príklac =

The procedure is as in Example 4, except that 10 g of chlorinated parezine is used as an addition to 90 g of branched polypropylene granulate. Autoadhézia prepared fz'_i'e 12.0 N.cnT ^first

i Example 7 в

As in Example 2, the isotactic polypropylene is used. The resulting film has an auochesion of 13.8 N.cm < 2 >.

The invention can find widespread use in the packaging industry in the manufacture of packaging films and their use in group packaging of products on pallets and in the packaging of individual products.

Claims (2)

EN 271 274 B1 2 Friklac; The process is carried out as in Example 4, except that 2 µl of chlorinated para-fin is used in addition to 98 g of branched polyethylene granulate. The autoadhesion of the prepared film is 18, 5 N.cn. Proceeding as in Example 4, except that 10 g of chlorinated paraffin is used as an addition to 90 g of branched polypropylene granulate. The autoadhesion of the prepared foil is 18.0 N.cm- · ·. EXAMPLE 7 B The procedure is as in Example 2, except that isotactic polypropylene is used. The acapacity of the resulting film is 13.8 N.cm -1. DESCRIPTION OF THE INVENTION Znres for the preparation of a polyolefin-based auto-adhesive fixing film comprising 90 to 99.8% by weight of a polyolefin and 0.2% by weight of polyolefin. % to 10% by weight of chlorinated paraffin containing 5 to 75% by weight of chlorine.