SU921877A1 - Laminated packaging material - Google Patents

Description

(5) LAYERED PACKAGING MATERIAL

I

This invention relates to laminated packaging materials. for packaging various products in various areas of the national economy, in particular for hermetic, opaque packaging of film photographic materials in the chemical and photographic industry.

A laminated packaging material is known, consisting of paper coated on both sides with a hydrolysable polymer coating L. . .

However, this laminated packaging material does not possess light-protective properties and is not subject to welding on automatic machines.

A laminated packaging material is known, consisting of paper, foil, adhesive layer and polymer coating, the adhesive layer made of polyester and the polymer coating is made of perchlorovinyl resin 2.

The disadvantage of the known material is the difficulty in | -gaming. Welding requires maintaining a high temperature due to high rigidity (brittleness of the polymer coating, and the formation of wrinkles and corrugations is observed during welding of packages, which adversely affects the tightness of welds. In addition, the material is inelastic.

The purpose of the invention is to improve the elasticity and weldability of the material.

This goal is achieved by the fact that in a laminated packaging material containing paper, aluminum foil. PG with polymer coating and adhesive layer, adhesive layer located between paper and foil and polymer coating and adhesive layer made of oxidized polyethylene.

In this case, the laminate contains paper as opaque paper as paper. In the process of producing a laminate, light-proof paper of the mark r-Ty8l-0 -05 foil aluminum GOST 618-73, polyethylene mark 15802-020-GOST 16, and cores (sleeves) cardboard for winding STPb-17-019-7 are used. Example. Two samples of the proposed laminated packaging material are manufactured on a high-performance unit equipped with a device for processing polyethylene with an extruder, a device for unwinding paper and aluminum foil and winding the packaging material with a control panel. The combination of paper and foil occurs with the help of polyethylene fed in the form of a melt from an extruder at 330115 ° C. In this temperature range, polyethylene is in a molten state, passes through an extruder die, and when contacted with air oxygen oxidizes it, is applied to the paper in contact with the foil, resulting in a high-strength bond of the paper with the foil. The rate of polyethylene nano.gray on paper and compound with foil 40-80 and / min. Polyethylene nano 15 to 20 g / m. The subsequent application of a polymeric coating of polyethylene on a fol is carried out in that mode at 330 ~ 15 ° C. The rate of application of polyethylene on the foil is 0-80 m / min, the deposition of polyethylene is 20 ± 5 g / m. The manufactured packaging material is wound onto cardboard shells weighing kg. 1200.0 Paper / 95-105 Paper "" 6 Polyethylene 16 Foil) 9 Polyethylene 20 Oola 180 Polyethylene / lung The fabricated material was subjected to comparison with the control sample (N3) of the known packaging material. To obtain a control sample of the packaging material, a solution of the following composition is poured onto the foil. Polyester resin (TUP-5P-66) 5.0 Methylene chloride 95.0 Watering is performed at a special installation. The air temperature during drying is 35 tO ° C, the thickness of the adhesive layer is 30-35 μm, the irrigation speed is 1.5 m / min. Then, the impregnated foil is combined with paper at the outlet of the drying chamber, after which, at the same setting and at the same irrigation rate, but at a drying air temperature of 55 ° C, a layer of perchlorovinyl resin with a thickness of 50 ± 5 µm is applied in a solution of the following composition,%: Perchlorovinyl resin (GOST 10004-72) 8.0 Acetone 5.6 Ethyl acetate 5, b Dibutyl phthalate 0.8 Properties of the obtained samples are given in the table. As can be seen from the table, the proposed packaging material has higher characteristics than the known. Thus, its elasticity is higher than that of the control sample, the weldability of packaging envelopes occurs at a lower temperature of about 150 ° C. The present invention eliminates the use of solvents and greatly simplifies the technology. 5-55 After chemical treatment (}, photographic processing of 100% of the subjects without photo defects is not detected, i.e. the bags are sealed

Table continuation

Claims (2)

Claim 1. A laminated packaging material containing paper, polymer coated aluminum foil and an adhesive layer, characterized in that, in order to improve the elasticity and weldability of the packaging material, the adhesive layer is located between the paper and the foil and the polymer coating and adhesive layer are made of oxidized polyethylene. 2. The material according to claim 1, starting with the fact that, as a paper, it contains opaque paper.