RU1792593C - Process for preparation of plant-growing substrate - Google Patents

Abstract

Usage: agriculture, in particular for hydroponic cultivation of plants. SUMMARY OF THE INVENTION: A substrate is made by producing a mineral wool carpet with the addition of hydrophilic additives and a binder, after which glass fiber canvas is applied to the mineral wool carpet on at least one, preferably landing surface. Then corrugate and fix the resulting structure with firmware or heat treatment.

Description

The invention relates to the building materials industry and can be used in the manufacture of a substrate for growing plants.

I, A known method of manufacturing a substrate for growing plants according to TU88USSR206-22-85, comprising obtaining a melt, processing it in fiber with the simultaneous introduction of hydrophilic additives and a binder. The molded mineral wool carpet is pre-densified in a vertical plane and fed & a heat treatment chamber and further for cutting into articles of predetermined sizes. The substrate has a horizontally layered structure. This method is adopted as an analogue.

The disadvantage of this method is (due to elasticity, high liquefaction, significant shrinkage during operation. The closest (prototype) to the previously known method is to manufacture a substrate, which includes obtaining a melt, processing it into fiber 6 by simultaneously introducing hydrophilic

additives, carpet molding, its corrugation, stitching with threads and cutting into products of the required sizes.

The disadvantage of this method is the preparation of a substrate having reduced quality of the main surfaces. On the surfaces there is a large amount of mineral wool fibers that irritate the skin of the hands and injure them when working with the substrate, as well as the significant evaporative ability of unprotected main surfaces.

The aim of the invention is to improve the quality of surfaces and improve the water-physical properties of the substrate, increasing its durability.

This goal is achieved in that fiberglass canvas is applied onto at least one major surface on the mineral base and corrugated together.

This embodiment of the manufacturing method will allow to obtain the mineral wool base of the substrate, the main surfaces of which will have high quality, there will be no fibers, located

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ny at an angle to the surface, because The fibers of the glass fiber are located in the square and are fastened together by a binder, i.e. spiky surfaces will be eliminated. The glass-fiber canvas covering the corrugations of the mineral base, will prevent, on the one hand, the intensive evaporation of the moisture introduced during irrigation, on the other hand, the moisture introduced into the substrate is more evenly distributed and held in the corrugation of the corrugations, which are limited to the glass contributes to the improvement of water-physical properties of the substrate. At the same time, the fiberglass cover of the corrugation 4 and is located; in vertical planes, increase rigidity, which will provide less shrinkage of the substrate during its operation, thereby increasing its durability. /; :::

; A positive effect is also achieved by the fact that the winding of fiberglass canvas is carried out due to friction forces at the contact point of the fiberglass canvas and the mineral wool base of the substrate during movement - -;: -; - 1; p: -: - H; } :: -:: -.

; Example 1. A mineral wool carpet with a width of 2 m and a thickness of 15Q mm, a density of 50 kg / m3 with a binder of up to 2% and a hydrophilic substance introduced into it up to 3% is fed to the production line of the Zhytomyr Mineral Wool Factory. The production line is additionally equipped with two reel winders. Olrk glass is applied to the passing carpet on both sides; rip TV21 canvas sheet -RSFSR-384-86. With the receiving rollers of the corrugator, the carpet is calibrated to 30 mm and corrugated together with the glass layers of the glass. Fiberglass thickness - 0.3-0.5 mm of each layer. The corrugated carpet is sealed in the axial direction and fed to the heat treatment, after

which is cut into products of size lOOOxiOpOMM. ;; ,

The resulting substrate having a thickness of 60 mm, density up to 115 kg / m3, compressibility

at 10 percent compression up to 8%, layers of fiberglass-canvas are deposited on the surface of the corrugations. The surfaces of this substrate are of high quality - there is no surface friability, i.e. lack of spiky. The strength of the substrate base is increased in comparison with the substrate without coating, which helps to reduce shrinkage and increase durability. Hardened layers of glass fiber of a true canvas

will inhibit the evaporation of moisture and inhibit the development of the microorganism on the working surfaces of the substrate.

Example 2. The same carpet without a binder, molded in a fiber deposition chamber, is fed by a conveyor to a production line equipped with devices for winding glass fiber canvas from coils, a corrugator and a piercing machine. On the carpet coming

on the receiving rolls of the corrugator, a layer of fiberglass canvas is applied to each working surface. With the receiving rolls of the corrugator, the carpet is calibrated to 30 mm and corrugated together with the casing layers of the fiberglass. the corrugated carpet is axially sealed and stitched with threads and cut into 1000x1000 mm products.

The resulting substrate, made in the form of a piercing mat, is coated with fiberglass, has working surfaces of improved quality and increased rigidity, which reduces shrinkage, i.e. has increased durability. The presence of coating layers of fiberglass canvas will prevent the evaporation of moisture from the surface of the substrate, as well as the development of microorganisms on its surface,