Ceiling environmental indicators

According to the national environmental protection standards, radioactive levels of ceiling materials are divided into three categories: (Mainly applicable to non-metallic, non-organic ceiling materials, such as gypsum board, etc.)

1. The specific radioactivity of the natural radionuclide radium-226, thorium-232, and potassium-40 in the decorative materials of Class A decorative materials meets the requirements of 1Ra ≤ 1.0, and 1r ≤ 1.3 requires Class A decorative materials. A type of decorative materials production and use of unlimited scope.

2. Class B decoration materials do not meet the requirements of Class A decorative materials but at the same time meet the requirements of 1Ra ≤ 1.3, 1r ≤ 1.9 Class B decoration materials. Class B decoration materials may not be used for the interior trim of a Type 1 service building, but may be used for the exterior and exterior finishes of civil buildings and all other buildings.

3, Class C decoration materials do not meet Class A, Class B decorative materials but meet the requirements of 1r ≤ 2.8 Class C decoration materials. Class C decoration materials can only be used for exterior finishes of buildings and for outdoor uses.

Note: Type I civil buildings: such as residences, elderly apartments, nurseries, hospitals and schools. Class II civil buildings: such as shopping malls, stadiums, bookstores, hotels, office buildings, libraries, cultural and entertainment venues, exhibition halls, and public transportation waiting rooms.

Ceiling classification, purchase, installation and maintenance

Ceiling materials are mainly mineral wool board, gypsum board, wood board, PVC plastic buckle board, glass, metal and so on.

1, PVC plastic buckle

1 Features

It uses PVC as a raw material and has been processed into a high-quality profile. It has the characteristics of light weight, easy installation, waterproof, moisture proof, and anti-worm-eaten. It also has a lot of changes in its color patterns, and it is also resistant to contamination, good cleaning, sound insulation, and insulation. The good performance of heat, especially in the new process, has added flame-retardant materials to enable it to be extinguished from the fire and safer to use. It has low cost and good decorative effect. Therefore, it occupies an important position in home decoration ceiling materials and becomes the leading material for ceilings of bathrooms, kitchens, toilets, balconies and so on.

2 quality assessment

When purchasing PVC ceiling profiles, be sure to ask the dealer for a quality inspection report and product inspection certificate. Visual appearance quality The surface of the board should be smooth, no cracks, no bumps, and it can be assembled and disassembled freely. The surface is turbulent and free of scratches; the sound of the board striking by hand is crisp. In the inspection test report, the product performance indicators should meet: heat shrinkage rate is less than 0.3%, oxygen index is greater than 35%, softening temperature is above Celsius degree, flash point is above 3000 degrees Celsius, water absorption rate is less than 15%, moisture absorption rate is less than 4%.

3 installation

First, the elevation line should be popped up on the wall, the pressure lines should be fixed at both ends of the wall, and the concrete nail should be firmly fixed with the wall. The plate is cut to the actual size of the ceiling. The plate is inserted into the battens. The slats are raised outwards. After the installation is straightened, the nails are fixed with nails. Then the second plate is inserted. The last plate should be cut according to the actual size. Use a sharp knife when cutting, press the elastic wire with a steel rule to cut it, insert it into the upper plate with a slight bend, insert the seal on both sides.

4Maintenance and replacement

PVC ceiling profiles are very resistant to water and scrubbing. After daily use, cleaning agent can be used to scrub and rinse with clean water; between the plate gaps, it is easy to be stained with oil. After cleaning, brush and cleaning agent can be used to scrub and rinse with clean water. Attention should be paid to the lighting circuit. If the PVC suspended ceiling profile is damaged, it is very convenient to update. As long as one end of the pressure strip is removed, the panel is removed from the pressure strip one by one. Replace the damaged panel with a new one and then reinstall the pressure strip. When replacing, it should be noted that the color of the new board and the old board should be the same, and there should be no color difference.

2, metal products ceiling

The ceiling of a metal product refers to a ceiling metal decorative plate that incorporates multiple functions and decorations. Compared with the traditional ceiling material, in addition to maintaining its characteristics, the texture, decorative sense is better, can be divided into sound-absorbing panels and decorative panels (without openings). The sound absorption board is based on the acoustic principle, using a variety of different perforation rate of the metal plate to achieve noise elimination, but also according to the needs of the round hole, square hole, long round hole, rectangular hole, triangular hole, size combination hole different hole type The floor is mostly white or aluminum. Another kind of metal decorative board, with special emphasis on decorative, simple and smooth lines, beautiful appearance, elegant color, bronze, gold, red and blue, milky white and other colors; specifications exactly match the width of ordinary houses, and marble, Aluminum alloy doors and windows and other materials are seamlessly connected, elegant and gorgeous, icing on the quiet room environment.

The material types of metal decorative plates include aluminum, copper, stainless steel, and aluminum alloys. The decorative plates with copper and stainless steel materials are of higher grades and higher prices. The general living room decoration and aluminum alloy decorative plates are more appropriate and suitable for people. Shopping psychology, that is, inexpensive. Specifications are rectangular, square, etc., the largest rectangular plate size 6000mm * 100mm * 0.5mm, the general width of the room is more than 5m, the decoration of the larger room, the use of a long strip of plate integrity; for the small room Decoration can generally use 500mm*500mm. Because of the poor thermal insulation properties of the metal plate, in order to obtain a certain sound absorption, thermal insulation function, in the choice of metal plate for ceiling decoration, you can use thermal insulation and absorption products such as glass wool, rock wool, etc. to achieve the function of thermal insulation. In particular, residents living on the top floor can improve the indoor environment after decorating and obviously save air-conditioning energy consumption costs.

3, gypsum board ceiling

Gypsum board is a new type of ceiling decoration material which is widely used at present, and has good decorative effect and good sound-absorbing performance. The commonly used plaster decorative boards and paper-surface decorative sound-absorbing panels are commonly used.

Plastering decorative gypsum board features light weight, moisture resistance, no deformation, fire prevention, flame retardant and other characteristics. It also has the advantages of convenient construction, good processing performance, sawing, nailing, planing, and bonding. The main varieties are: all kinds of flat, pattern relief board, semi-perforated plate, full perforated plate, waterproof board and so on. Pattern embossed panels are suitable for the living room, bedroom, study ceiling of the living room; waterproof boards are used in places with high humidity, such as kitchens and bathrooms.

Paper-faced decorative sound-absorbing panels have the characteristics of fire prevention, sound insulation, heat insulation, good anti-vibration performance and convenient construction.

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Vitrified Grinding Wheels

Vitrified Grinding Wheels mean grinding wheels in ceramic bonded. Vitrified grinding wheels can be superabrasive grinding wheels like diamond grinding wheel or CBN Grinding Wheels. It also can be abrasive grinding wheels such as white aluminum oxide grinding wheel,pink grinding wheel,silicon carbide grinding.

Vitrified grinding wheel is only one type of bond, which is ceramic, it can be in any type of abrasive.

The main ingredient of vitrified bond are vitreous material with low melting point, such as borosilicate glass, lead glass, etc.It is widely used in various grinding methods such as outer circle, inner circle, flat surface, centerless, etc. It is the most commonly used bonding agent for abrasive tools.

Vitrified bond is characterized by high chemical stability, almost can work in a variety of cooling media, small elastic deformation, brittle, can be made into a variety of hardness levels of grinding tools to adapt to the processing of various hardness of the workpiece. Vitrified bond has good self-sharpening.

The grinding efficiency of single crystal diamond with vitrified bond grinding wheel is higher than metal bond grinding wheel. The wear ratio is very small and the processing cost is low. Therefore, the grinding efficiency of single crystal diamond with ceramic bond grinding wheel can be greatly improved.

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Henan Jinlun Superhard Material Co., Ltd , https://www.kmgrindingwheels.com