CS252437B1 - Self-extinguishing paper - Google Patents

Abstract

Paper is made of cellulose-based wafer fibers, possibly containing other fibrous and non-fibrous components, in which the flammability is reduced by impregnation with a zinc amino complex. The use of paper treated in this way is primarily in the production of carnival goods, but also wherever the use of fibrous materials could lead to a fire (for example, when using wallpaper).

Description

FIELD OF THE INVENTION The invention relates to flame retardant papers, cartons and paperboard. Paper and other products resulting from felting natural cellulose-based fibers account for the vast majority of the papermaking product range. The natural property of these fibers and hence their products is low temperature resistance when the material is pyrolyzed and burned · The actual reduction of flammability can be influenced by practically two basic ways, either by increasing the amount of energy needed for combustion, or by reducing the amount of energy released during combustion, which essentially means reducing the formation of flammable compounds during the action of an ignition source. The presence of flame retardants lowers the combustion temperature and thus reduces the amount and transport of low molecular weight fragments into the gas zone. The application of flame retardants can be carried out in a number of ways, depending on the type of paper or board, the type of retarder used, the amount required, and the retarding effect.

Depending on the type of retarder and its application rate, as is known in the literature, cartons and boards with variously reduced flammability to flame retardancy can be prepared. Flame retardancy can be defined as a property of the mass to turn off spontaneously within 30s after being removed from the flame or after the source of combustion ceases. As flame retardants are used eg carbonates, regulating the burning of cigarette paper, chlorinated paraffins, releasing hydrogen chloride during burning, calcium chlorides, ammonium, magnesium, aluminum, where the pyrolysis is actually controlled

- 2 cellulosic material to prevent or reduce levoglucose · formation of borax-boric acid coating creates a barrier that prevents air oxygen from entering · 1 coatings of urea reaction product with formaldehyde and phosphoric acid added, according to other sources, borax or boric acid is applied to the fibers and the paper is then coated with ethyl vinyl acetate or polyvinyl acetate. According to other sources, the flammability is reduced by the addition of highly flammable substances, or of non-flammable, fibrous but also non-fibrous substances. These are ceramic, glass, ground dolomite, magnesium sulphate, water glass and the like. Furthermore, in special cases, organophosphates of various types are applied. The use of retarders also brings specific negative phenomena such as various limitations of usability, negatively affecting the original properties of paper and board, but also their usability as secondary raw materials - plastic coatings contain halogens, chlorinated paraffins · Phosphates and other substances are inherently nutrients for microorganisms.

Additions of non-combustible substances, whether in the form of fibers or non-fibrous fillers, cannot always be applied in the required quantities.

The object of the present invention is to provide a self-extinguishing paper made by felting cellulose-based fibers, optionally containing 1 fibrous and non-fibrous component and containing a zinc araocomplex in an amount of 15 to 40% by weight, based on the fiber content. The controllability of the retarding effect is achieved by controlling the content of the zinc amocomplex in the paper material. This has been proven in conventional tests used to assess flame retardancy.

- 3 Example 1

Packaging carton ee self-extinguishing surface weight

160 g.m unfilled, contains 20% by weight of zinc amocomplex ·

Example 2

Printing paper containing 7% by weight of kaolin with a weight of 80 g.m contains 28% by weight of zinc amocomplex ·

The self-extinguishing paper described in the invention can be processed as recovered paper in conventional equipment without problems.

Claims (1)

Self-extinguishing paper made by oeluloza-based felting, whether or not containing other fibrous and non-fibrous constituents, characterized in that it contains a zinc amocomplex in an amount of 10 to 45% by weight of the fibrous constituents Uzgorod Uzgorodsky production-printing company, Proektnaja 4, ^ 4790, Price 2 ^ 40 Kcs