CS273324B2 - Stamped protective foil - Google Patents

Abstract

The invention concerns stamped protective foil for self-adhesive products for medicinal purposes. The foil consists, by mass, of 99.63 to 95.75 parts polypropylene, 0.1 to 3.0 parts titanium oxide, 0.02 to 0.05 parts amide of oleic acid, 0.05 to 0.2 parts colloidal silicic acid and 0.02 to l.0 parts antistatic agent. The foil is significant due to its low adhesion to self-adhesive products for medicinal purposes and good mechanical characteristics.

Description

Embossed protective foil> 0 The solution relates to embossed protective foil for self-adhesive products for medical purposes. This film consists of 99.63 to 95.75 parts by weight of polypropylene, 0.1 to 3.0 parts of titanium dioxide, 0.02 to 0.05 parts of oleic acid amide, 0.05 to 0.2 parts by weight colloidal silicic acid up to 0.02 to 1.0 parts antistatic agent. The film is characterized by low adhesion to self-adhesive products for medical purposes and very good mechanical properties.

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The invention relates to a stamped protective film for self-adhesive products for medical purposes.

This protective film is based on modified polypropylene.

Known protective films for medical purposes are based on modified low monomer polyvinyl chloride and high density polyethylene.

The film according to the invention consists of 95.75 to 99.63 parts by weight of polypropylene and 0.37 to 4.25 parts of modifying agents, of which 0.05 to 0.2 parts of colloidal silicic acid, 0.1 to 3 parts of titanium dioxide 0.02 to 0.05 parts of oleic acid amide and 0.02 to 1 part of an antistatic agent. The film is produced by blowing and cutting. The raw material for producing the film is a granulate preformed in an extrusion granulation unit.

The film web is embossed by passing a pre-wetted film at a temperature of up to 383 K between a negative-metal-embossing metal embossing roll and a rubber counter roll having a rubber layer hardness of approximately 70 according to Shore A. of compressed air. The film is wound on a take-up roll.

The film according to the invention has low adhesion to self-adhesive products for medical purposes and very good mechanical properties.

The film according to the invention has, for example, the following composition:

Example 1

Polypropylene 97.50 mass parts titanium white 1.75 mass parts oleic acid amide 0.05 mass parts colloidal silicic acid 0.20 mass parts antistatic agent 0.50 mass parts 100.00 mass parts Example 2 Polypropylene 95.75 mass parts titanium white 3.00 mass parts oleic acid amide 0.05 mass parts colloidal silicic acid 0.20 mass parts antistatic agent 1.00 mass parts 100.00 mass parts Example 3 Polypropylene 99.63 mass parts titanium white 0.10 mass parts oleic acid amide 0.02 mass parts colloidal silicic acid 0.05 parts antistatic agent 0.20 mass parts

100.00 parts by weight * ·

TABLE 1

TYPE OF FOIL Dloužená polyvinylchloride according to invention high density polyethylene Thickness (mm) 0.08 0.07 to 0.08 0.05 to 0.07 tensile strength (MPa) 31.3 10 to 21.5 37.5 - along (N / 15 mm) 42.2 18.4 to 32.6 44.5 - across (N / 15 mm) 10 20.8 to 22.8 -

separation resistance

layers (N / 10 mm) - cotton fabric + rubber adhesives - plastic foil + 0.4 to 0.5 0.4 to 0.6 0.4 to 0.6 acrylic adhesive 0.6 to 0.8 0.5 to 0.8 0.5 to 0.8 - fleece + acrylic adhesive 0.2 to 0.3 0.2 to 0.3 0.2 to 0.3

The table shows comparative test results for films made from modified polypropylene according to the invention, for a wide range of high density polyethylene films produced worldwide and for films made from modified polyvinyl chloride. The test results show that the properties of the embossed foils based on the modified polypropylene according to the invention are equivalent to the other two foils.

The film according to the invention exhibits more favorable properties than the previously produced polyolefin-based films (PE-LD and PE-HD) and has equivalent properties to the stretched polyvinyl chloride film and the embossed film. This is shown in Table 1 of the Comparative Examples.

In the case of the film according to the invention, far fewer operations are required to obtain its properties than in the stretched polyvinyl chloride film. Thus, the film according to the invention has a higher effect.

Claims (1)

SUBJECT OF THE INVENTION Embossed protective film for self-adhesive products for medical purposes, characterized in that it consists of 99.63 to 95.75 parts by weight of polypropylene, 0.1 to 3 parts of titanium dioxide, 0.02 to 0.05 parts of oleic acid amide, 0.05 to 0.2 parts of colloidal silicic acid and 0.02 to 1.0 parts of antistatic agent.