RU2626477C1 - Method of production of colored glass products - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: method of production of coloured glass products includes the following stages: preparation of raw materials, compilation of charge, melting of glass mass, moulding of products and their subsequent cooling. At the cooling stage, when the glass surface reaches the temperature of 80°C, a composition obtained by ultrasonic mixing of the following components is applied to it: a colloidal polymer base, single-walled carbon nanotubes (SNT), and food colouring agents of a given colour. The content of SNT in the composition ranges from 0.005% to 0.2% of its total mass, and food colouring-from 0.04% to 10% respectively.

EFFECT: increasing the adhesion of the coating to the surface of the glass colour and durability of the finished products.

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Description

The invention relates to the glass industry and can be used in the manufacture of various colored glass products, such as bottles, sheet glass, as well as in the manufacture of ceramic products.

The classic method of manufacturing glass containers is the following sequence of technological operations:

- preparation of raw materials;

- preparation of the charge;

- glass melting;

- molding, annealing of products (see, for example, http://www.zavodstekla.ru/zatehpod.htm).

There are various methods for the production of colored glass (see, for example, patents of the Russian Federation No. 2181347, IPC C03C 1/10, C03C 4/02, published April 20, 2002; 2327657, IPC C03C 3/087, C03C 4/02, published June 27, 2008; 2514868, IPC C03C 3/087, C03C 4/02, published May 10, 2014) by additional introduction of various additives into the charge at the stage of its preparation.

These methods allow the manufacture of glassware, the color of which is determined by the composition of the prepared raw materials. That is, if the initial raw material is colorless, then the final product will also be colorless, if it is blue - blue, etc. Moreover, to change the color of the resulting product, it is necessary to stop the production cycle and change raw materials, which requires significant time, energy and other costs.

There are various methods of applying coatings on the glass surface that create an electrically conductive surface, which allows further powder coating of such surfaces (see, for example, patents RU No: 2464243, IPC C03B 27/02, C03C 17/245, published October 20, 2012; 2274675, IPC C23C 14/08, C03C 17/245, published April 20, 2006; 2447031, IPC C03C 17/245, published April 10, 2012), in which the coating is directly applied to finished products and is a separate process requiring appropriate equipment (technological line).

A known method of hardening container glass during its production, according to which directly at the exit of the lehr ("cold end"), the polymer-based coatings are usually applied to the bottle, which make its surface sliding, reducing the friction of the bottles against each other, which makes it possible protect the surface of the bottles from scratches and scuffs during further work with them and damage during friction against each other during transportation (see, for example: Dineff D. Coatings for glass containers // Glass containers. - 2008. - No. 2. - P.12- 13).

This method is embedded in the overall technological "chain" of the production of molded glass products. However, improving the quality of the surface and increasing the strength of the finished product, it does not provide the ability to obtain glassware of a given color in each case.

The task of the invention is to obtain a highly adhesive colored coating of the outer surface of glassware with a simultaneous improvement of strength characteristics in the process of their production.

The technical result of the invention is to solve the problem, namely obtaining from glassware in their manufacture (without organizing a separate process) a colored outer surface having high adhesion to glassware.

The technical result is achieved due to the fact that in the method for the production of non-ferrous glass products, which includes the following steps: preparation of raw materials, preparation of the mixture, melting of glass, molding of products and their subsequent cooling, at the cooling stage, when the surface of the glass products reaches a temperature of 80 ° C, it is applied composition obtained by ultrasonic mixing of its components: colloidal polymer base, single-walled carbon nanotubes (ONT) and food coloring of a given color, while the content of ONT in the composition wish to set up from 0.005% to 0.2% of its total weight and content of food coloring - from 0.04% to 10%, respectively.

The implementation of the proposed method (for example, in the manufacture of glass containers) is as follows.

1. At the preparation stage, various types of raw materials (cullet, charge components) are cleaned of unwanted impurities and placed in the receiving hopper of the processing line.

2. Next, the preparation of the mixture is performed — a dry mixture of materials that are fed into the furnace to produce glass melt, for which its components are metered into the mixers, where they are mixed, and then the resulting mixture is fed into the cooking furnace.

3. Glass melting is carried out directly in the melting furnace, which ends by cooling the glass to a temperature at which it acquires the viscosity required to produce glass by blowing, and then feeds it to molding.

4. After passing through the molding process, depending on the type, the temperature of the glass product is reduced in a certain way to a temperature of 80-100 ° C. So, to relieve internal residual stress in thin-walled products (for which this is critical), they are subjected to additional heat treatment, lengthening the cooling process. Products with sufficient wall thickness can naturally cool.

5. When glassware is cooled to a temperature of 80 ° C, a composition obtained by ultrasonic mixing of ONT and the required food coloring in the required concentration is applied to its outer surface (from 0.04% to 10% depending on the color and quality requirements of the final coating) with a colloidal polymer base (for example, polyethylene) at the stated ratio of mass fractions. The composition is applied, for example, by moving glassware through a chamber in which the composition is in the dispersed phase.

6. Next, the finished product is cooled to ambient temperature. Conducted at JSC "Plant" Screen "experiments with products obtained by the claimed method, showed the following:

- the applied composition has high adhesion to glass,

- applying the composition allows to obtain a uniform coating of glassware of a given color,

- the resulting coating has a low coefficient of friction,

- there is a slight increase in the strength of glass products (~ 7% relative to products obtained in a standard way).

Thus, the products obtained by the claimed method, without losing their standard consumer properties, have a high-quality color surface.

Claims (6)

A method for the production of colored glassware, comprising the following steps: - preparation of raw materials, - preparation of the charge, - glass melting, - forming products and their subsequent cooling, characterized in that at the cooling stage, when the surface of glassware reaches a temperature of 80 ° C, a composition is obtained on it, obtained by ultrasonic mixing of its components: colloidal polymer base, single-walled carbon nanotubes (ONT) and food coloring of a given color, while the content of ONT in the composition is from 0.005% to 0.2% of its total mass, and the content of food coloring is from 0.04% to 10%, respectively.