Analysis of common problems in construction quality of stone like paint by hydroxyethyl cellulose manufacturers

Hydroxyethyl cellulose manufacturer Shandong chuangyao explained the construction process of real stone paint: leveling → spraying sealing primer → snapping ink line and dividing grid → pasting double-layer tape and dividing strip → spraying the first layer of real stone paint → tearing off the first layer of tape → spraying the second layer of real stone → tearing off the second layer of adhesive tape → mortar joint treatment → spraying two coats of topcoat. Quality control of hydroxyethyl cellulose manufacturer Shandong chuangyao biological technology analysis real stone paint

1. For all external corners, the long side to the short side should be arranged to give the visual effect of the whole brick masonry.

2. Small particle stone like paint is used. After spraying, the surface is required to be smooth, with small fluctuation, and the particles are evenly distributed and dense, and the color is consistent.

3. It is suggested to use high viscosity hydroxyethyl cellulose as thickener when the temperature is higher than 30 ℃, and low viscosity thickener is recommended when the temperature is lower than 10 ℃.

4. It is required that the mortar joint should be horizontal and vertical, and the width should be consistent. Special attention should be paid not to take away the bottom coating when tearing the dividing strip.

5. Grasp the tearing time of the dividing tape. If the surface of the real stone paint is dry, it can be removed when it is pressed by hand without obvious indentation and does not stick to the hand. If the real stone paint is removed too early, the real stone paint will flow; if it is torn too late, it will not be easy to tear off the dividing tape, and the real stone paint at the mortar joint will be removed and the mortar joint will not be smooth.

6. The paper tape should be used as the dividing tape, which has a good adsorption effect on the real stone paint; if the plastic surface tape is used, the real stone paint will flow. At the same time, during the construction in summer, the tape should have good temperature resistance to avoid the melting of the back side of the tape at a slightly higher temperature, which will lead to the difficulty in tearing off the adhesive tape.

7. The real stone paint of the same monomer should be completed at one time to reduce the color difference.

Analysis of common quality problems

1. Splash during spraying

First of all, it may be due to unreasonable collocation of natural gravel particles and unreasonable consistency of stone like paint; secondly, it may be caused by construction reasons, such as too large diameter of spray gun and improper selection of spray gun pressure.

2. Whitening in water

The reason is that the first is related to the preparation of emulsion used in genuine stone paint. Some emulsion manufacturers increase the long time of the surfactants used to increase the stability of the emulsion, resulting in the decrease of the water resistance of the emulsion. Second, the genuine stone lacquer manufacturers only add a small amount of emulsion to save the cost, so that after the drying of the stone paint, the film is loose, not dense enough, the water absorption rate of the film is large, and the bonding strength is low, once it meets the rainy weather for a long time. Third, some stone paint manufacturers add a lot of thickeners such as hydroxymethyl fiber rope and hydroxyethyl cellulose in the preparation, and these substances are water-soluble or hydrophilic, and the stone paint remains in the coating after the film is formed, which reduces the water resistance of the coating.

3. Hair flower

The reasons are that the base course has efflorescence phenomenon, using inferior cement to make mortar, the cement mortar ratio is not accurate or the curing period is short; the thickness of stone like paint is uneven during construction, the amount of real stone paint is too small and too thin; the proportion of cellulose in the production of stone like paint is too large

4. The paint film is too soft

The main reason is improper emulsion selection or low emulsion content, resulting in insufficient coating on the film.

5. Yellowing

The main reason is the quality problem of the emulsion in genuine lacquer. Some genuine lacquer manufacturers use poor acrylic emulsion as binder. The emulsion will decompose by ultraviolet radiation, and the coloured matter will be precipitated, resulting in yellowing.

6. Shrinkage cavity

The reason is that there are oil stains in the base course, grease mixed in the paint or rain construction.

Shandong chuangyao Biotechnology Co., Ltd www.cyhuagong.com

Editor: Shandong chuangyao time: March 14, 2016