SU1348354A1 - Composition for producing packing film by extrusion method - Google Patents

Abstract

The invention relates to the field of creation of polyolefin alyonok by extrusion blow molding and arms used for packaging. The invention eliminates slipane: e films and increases their strength and deformation properties by introducing into a mixture of polyethylene and 1g polypropylene of a copolymer of tetrafluoroethylene and hexafluoropropylene with a ratio of 1: 1 in an amount of 0.2-0.5 mach. dispersing substances - mixtures of polyethylene glycol ether or al, pf. leula with an average degree of oxica ethyroroxy 7 in an amount of 0.032-0.005 wt.h, kp 100 May, h. and 5-25 ma.ch. polyethylene to polypropylene. 2 gab. TsvGY. IO.) 45 GO SO ate

Description

one

This invention relates to the manufacture of polyolefin films by blown extrusion, used for packaging.

The purpose of the invention is to eliminate spruce and increase the strength and deformation properties of films from a mixture of polypropylene and polyethylene.

The invention is illustrated by the following examples.

Examples 1-8. Polyethylene (grade 10802-020) is mixed with TFE / HFP copolymer powder and a mixture of polyethylene glycol ethers of alkylphenol with an average degree of hydroxyethyl 7 (OP-7) in a paddle type mixer for 15 minutes and granulated. The resulting granules are mixed with polypropylene granules (grade 21012) and extruded at 220-2AO C (temperatur

100 5

100 100

ten

483542

round annular head, air cooling). A tube blank with a thickness of 500 µm is stretched and inflated (), a 30 µm thick film sleeve is folded and fed to the take-up rolls for winding.

The ratio of components in examples 10 frames 1-8 are given in Table. one.

PRI me R 9 (known). The mixture of granules, wt.h.: polypropylene (grade 21012) 100 and polyethylene (grade 10802- 020) 5, are extruded as in Example 1. 15 Example 10 (known). Mixture, wt.h .: polypropylene (grade 21012) 100, polyethylene (grade 10802-020) 5 and chalk (marks MMC-1) 0.5, stirred in a paddle type mixer for 2 minutes for 15 minutes and extruded as in Example 1.

Table

100 3

100 100 5 5

100 100 5 5

100 5

The magnitude of the film peeling force (URS) was defined as the force of the beginning of the peeling of the film strips with a width of 1 cm.

 Relative elongation at break (p) and breaking stress at stretching ((p) were determined in accordance with GOST 14236-72 (numerator is the value along the web, the denominator is the value across the web).

Compiled by 0.Barashkov. Editor M.Needoluchenka Tehred L.Oliynyk Proofreader L.Pilipenko

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VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

rmula of invention

An extruded packaging film composition comprising polypropylene and polyethylene,

in order to eliminate the adhesion of film layers and improve the strength and deformation properties, it additionally contains a copolymer of tetrafluoroethylene and hexafluoropropylene with a ratio

1: 1 ditch and dispersing agent, a mixture of polyethylene glycol ethers of alkylphenol with an average degree of ethoxylation of 7, in the following ratio of components, May, h ,:

Polypropylene Polyethylene

A tetrafluoroethylene and hexafluoropropylene copolymer with a monomer ratio of 1: 1

A mixture of polyethylene glycol ethers of alkylphenol with an average degree of ethoxylation 7

100 5-25

0.2-0.5

0.002-0.005

Claims (1)

Claim Composition for the manufacture of a packaging film by extrusion, including polypropylene and polyethylene, characterized in that, in order to eliminate adhesion of the film layers and improve the strength and deformation properties, it additionally contains a copolymer of tetrafluoroethylene and hexafluoropropylene with a monomer ratio of 1: 1 and a dispersant, a mixture of polyethylene glycol ester of alkyl phenol with an average degree of hydroxyethylation of 7, with the following the ratio of components, May, h: Polypropylene 100 Polyethylene 5-25 The tetra- copolymer fluoroethylene and hexafluoropropyl Lena with correlation- monomers 1: 1 0.2-0.5 A mixture of polyethylene glycol ethers alkyl phenol co moderate degree hydroxyethylated 7 0.002-0.005