SU1713917A1 - Adhesive melt - Google Patents

Abstract

This invention relates to sticky adhesive m-melts for the manufacture of adhesive tapes and labeling labels based on paper, polymer film materials and metallic foils. The invention makes it possible to reduce the sticking of waste film materials to an anti-adhesive substrate, to ensure technical performance at elevated temperatures and speeds of the process of making adhesive labels, to increase adhesion and resistance to acrylic varnish, salt fog and water vapor due to the additional content in the composition, including , ^ wt.%: divinyl styrene or isoprene styrene thermoplast 20-40: tack agent 55-65, plasticizer 4-10: low molecular weight polydieneurethane rubber with a content of 1.6-3.0% terminal epoxy groups 1-5. 1 tab.

Description

The invention relates to the production of sticky hot melt adhesives for the production of adhesive tapes and labeling labels based on paper, polymeric film materials and metal foil, which can be used in various sectors of the national economy in labeling and packaging instruments, products and equipment. .

Known hot melt adhesive containing, in wt.%: Butadiene (isoprene), styrene thermoalastoplast 8–13, liquid carboxyl-releasing nitrile-butadiene rubber Tr-16; polyisobutylene with mol.m. 1000020000 10-16. ethylene-vinyl acetate copolymer. (containing 17–33% vinyl acetate units) 10–16: tack agent 34–59; plasticizer 2-5.

The disadvantage of this glue is also the poor separation of the lattice after the label has been formed on the cutting stamp (removal of waste adhesive film) from the release paper at elevated (up to 90 ° C) temperatures and speeds in the process.

the production of marking labels on the automated line, as well as insufficient adhesion and resistance to acrylic lacquer, salt fog and water vapor.

The purpose of the invention is to reduce the sticking of waste film materials to an anti-adhesive substrate, to provide processability at elevated temperatures and speeds of the process of making adhesive labels, to increase adhesion and resistance to acrylic lacquer, salt mist and water vapor.

The goal is achieved due to the additional content in the hot melt glue of low molecular weight polydieneurethane rubber with a content of 1.6-3.0% of the end epoxy groups in the following ratio of components, wt.%;

Divinylstyrene

or isoprene styrene

thermoplastic elastomer 20-40

Agent stickiness55-65

Plasticizer4-10

Low Molecular Poly Dienurethane Rubber with Epoxy End Groups 1-5

within 1.6-3.0% Divinylstyrene or isoprene styrene 1 thermoplastic elastomer with cf; holding styrene 28 ± 2% 20-40 Agent stickiness55-65

Plasticizer4-10

Low molecular weight polydiurethane rubber with epoxy-terminated groups in the range of 1.6-3.0% 1-5

As a thermoplastic elastomer, divinyl styrene or isoprene styrene block copolymers are used with a content of {5ola 28 ± 2% of grades DST-30 and IST-ZL. Pine rosin, rosin esters, polyterpenic esters, feminol formulides, coumaronindenic, polyterpenic resins, and xylenol copal of the SF-170 brand are used as an agent of stickiness. Phthalic and sebacic acids are used as plasticizers. Low molecular weight polydiene urethane rubber with terminal epoxy groups of 1.6-3.0% of the mark PDI-ZAK is used as a polymer additive. which is a viscous, uniform yellow liquid.

Adhesive melt glue is prepared using the following technology.

A thermoplastic elastomer and 1/2 of a tackiness agent are loaded into a g-blade mixer preheated to 110120 ° C. Stirring is carried out until a single, E4NO mass is obtained. After that, the remaining part of the stickiness agent and low molecular weight polydiolurethane rubber with terminal extracts within 1.6-3.0% is loaded, mixed until the composition is completely melted, then a plasticizer is added. Stirring is continued until a homogeneous molten mass is obtained. The finished glue is discharged into cardboard boxes, the inner surface of which is pre-coated with release paper to prevent the adhesive from sticking to the walls and bottom of the container.

Adhesive melt glue is cooled in air. The adhesive is a uniform, rubbery, sticky product from light brown to brown. The adhesive is applied evenly to paper or other substrates by extrusion at 180 ± 20 ° C and protected with release paper.

The table shows the formulations of the proposed known glue and their properties.

Claims (1)

Invention Formula Adhesive melt glue for making adhesive tapes and labeling labels. including Divinylstyrene or isoprene styrene thermoplastic elastomer, a tackifier agent and a plasticizer, so that. in order to reduce the sticking of waste film materials to the anti-adhesive substrate, to provide processability at elevated temperatures and speeds of the process of making adhesive labels, to increase adhesion and resistance to acrylic varnish, salt fog and water vapor, it additionally contains a low molecular weight polydieneurethane rubber containing 1.6-3.0% of terminal zgtoxide groups in the following ratio, wt.%: Divinylstyrene or isoprene styrene thermoplastic elastomer 20-40 Agent stickiness55-65 Plasticizer4-10 Low molecular weight polydiurethane rubber containing 1.6-3.0% of the end epoxy groups1-5 Table continuation Table continuation II p and m and n and e. The adhesive ability is expressed in seconds, i.e. the time required to peel off 30.0 mm of the tape at an angle of 90 ° and the effect of a load weighing 200 g, at a width of 10 mm; it is necessary that the tape be stuck on the support 24 hours before the start of the test.