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In this era of formaldehyde change, we also need to have a general understanding of the formaldehyde released from various materials used in decoration. In all the main materials, the area covered by the floor is large, if the formaldehyde release exceeds the standard value, The harm to family members is also considerable. Now many people will choose to buy wood flooring composite floor, but because the composite floor is glued together with glue, so the release of formaldehyde in the end what kind of range we all have to know.
| A. Classification of composite flooring |
There are two main types of composite flooring on the market today: one is solid wood composite flooring; the other is reinforced laminate flooring. These two types of laminate floorings have different characteristics and require different requirements for use and maintenance.
Solid wood composite flooring has both natural and comfortable flooring, comfortable footwork, and good insulation properties. It also overcomes the insufficiency of solid wood flooring due to the shrinkage of monomers. Now that the living environment is no longer deteriorating, countries all over the world attach great importance to the protection of forest resources. Solid wood flooring can save precious wood resources compared to solid wood flooring. In addition, solid wood flooring is easy to install, and it is not necessary to use keels in general. However, it requires ground leveling.
Solid wood composite floor can be divided into three categories of solid wood composite floor, multi-layer solid wood composite floor, fine wood composite floor three categories, more than three layers of solid wood composite floor in the room decoration.
The three-layer structure solid wood composite floor is formed by three layers of solid wood, and the surface is made of high-quality hardwood specifications. The commonly used tree species are ash, birch, beech, beech, maple, and cherry. The middle is a cork board, and the bottom layer is a rotary board, arranged in a crisscross pattern. This structural composition makes the three-layer solid wood composite floor not only has the advantages of ordinary solid wood flooring, but also effectively adjusts the internal stress between the wood, and improves the shortcomings of the wood with large changes in dry humidity during the season.
The solid wood floor has a good foot feeling, natural texture and color, and slightly less hardness. And because it is natural, textures and colors vary greatly. Wooden keels are required when paving, and the price is relatively high.
The high-strength composite flooring has high hardness, good wear resistance, simple and convenient pavement, and low price, but the foot feels slightly worse.
Solid wood flooring absorbs the advantages of the above two, the price is between the two, but the hardness is the worst of the three.
| Two. Composite floor selection |
When selecting composite flooring, it is necessary to ensure that the major indicators are qualified. These indicators and national standards are:
1. Thickness of water-absorbing thickness: The water-absorption thickness expansion rate of excellent products is below 2.5%; the water-absorption thickness expansion rate of first-class products is below 4.5%. With water bubbles, the quality of water absorption is poor.
2, the surface wear resistance: the floor because there is no wear layer or abrasion resistance is extremely low and is called false floor, this floor surface and real composite floor no difference with sandpaper after grinding several times, will find The decorative pattern was polished and whited immediately. This floor is a fake floor.
The service life in public places will generally not exceed six months. The stronger the grinding, the price is also more expensive. The number of wearable revolutions in public places is above 9000 rpm; if you have a large population in your home, you don’t pay much attention to maintenance, you can choose some higher wear resistance; but if you pay more attention to the maintenance of the floor, the floor is subject to strong and hardware wear. With fewer opportunities, it may be more economical to choose a bit lower wear resistance. Family wear-resistant rotations can be more than 6,000 rpm. . Can be rubbed with sandpaper, poor quality is easy to find. The wear resistance of composite flooring mainly depends on the coating of aluminum oxide crystals (commonly known as gemstones). The higher the aluminum oxide crystal content per unit area of ​​the floor, the higher the degree of wear resistance.
3, formaldehyde emission: A grade of formaldehyde release value of 9mg/100g or less. B pole 9 to 40 mg / 100 g, to reach the B level can be used. The quality of the glue determines the degree of contamination of the laminate flooring, and the quality of the good glue formaldehyde is low. "European" floor formaldehyde content of only 5MG/100G, lower than the EU standards, ranking first, becoming the first imported floor access to the China Environmental Labeling Commission certified green products.
4, density: the density of qualified products ≥ 0.9g/cm3.
5. Moisture content: The moisture content of the qualified products is in the range of 3.0-10.0%. When people purchase floors, they can check the data through product inspection certificates.
6. Check whether the business outlet is straight. The completeness of the mouth is directly related to the life of the floor.
7, the surface of the impregnated plastic film paper finishes should not have dried flower opaque white dots, wet flower spray, stains, scratches and indentation, around the tongue and tongue and groove should remain intact. The length, width, and thickness of the composite plate should be the same as those of the product introduction. You can take as many pieces of composite flooring as you like to observe after combining them. See if the splicing seams of boring heads are uneven or not. Assemble by yourself to observe whether the jaws and grooves are tightly combined and feel smooth. The middle layer of parquet can not only increase the feeling of foot, but also prevent the expansion and deformation of the floor. The thickness should be 7-10mm. In the material selection, the quality of rubber wood and pine wood in the middle layer is higher, followed by willow wood. Multi-layer solid wood composite floor often uses multi-layer plywood as the base material, and the surface decoration panel is mostly made of hardwood laminations, and the thickness is usually between 0.2-0.8 mm.
8, the middle layer of solid wood flooring, not only can increase the sense of foot, but also to prevent the expansion of the floor deformation, the thickness of 7-10mm is appropriate. In the material selection, the quality of rubber wood and pine wood in the middle layer is higher, followed by willow wood. Multi-layer solid wood composite floor often uses multi-layer plywood as the base material, and the surface decoration panel is mostly made of hardwood laminations, and the thickness is usually between 0.2-0.8 mm.
Consider the size of the living area. Under normal circumstances, if the room is large and the lighting is sufficient, a darker, thicker texture wood floor should be selected to make the relatively large room relatively compact. On the other hand, the room with a small area can use light colors and textures. The wooden floor gives a sense of openness and will make the smaller room appear spacious.
9, consider the different functions of each room, different rooms can choose to use different colors of wood flooring. The living room is the most open place in the family, and it is also the main place for family activities and reception. Therefore, it is advisable to use high transparency and soft colors to create a clear, harmonious and elegant atmosphere. The bedroom is for rest and relaxation. Place, should use warm colors or some neutral colors of the floor, giving a quiet, comfortable feeling; Children's room is the place for children to sleep, study, and living, should be simple, cheerful, clear, using light and bright colors will be good; The study room is the place where the owner of the room works and learns. The environment should have a strong cultural atmosphere, and the color used should also be a stable dark floor.
In fact, as long as the amount of formaldehyde released from solid wood flooring meets the national standards, it can be used with confidence and will not cause any harm to the human body. China National Standards enforce mandatory environmental protection standards for floor formaldehyde emission, which are: E1 grade, ≤1.5mg/L (dryer method), ≤0.12mg/L (climate box method, used in arbitration). The test standard should be the same, but the standard is not the same when the test method is different. Solid wood composite flooring is a floor made of several layers of wood glued together. The better the glueing performance, the longer the service life of the flooring, the more durable it is, and the easier it is to maintain.
Consumer Warning: At present, in the solid wood composite flooring market in China, solid wood composite flooring products may contain formaldehyde and other harmful adhesives to human health in the production process. Therefore, manufacturers and consumers should pay attention to the environmental indicators of solid wood composite flooring. At the same time, formaldehyde emission from solid wood flooring should meet the national mandatory standards.
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Summary: Read the relevant knowledge about whether the formaldehyde content of the laminate flooring exceeds the standard. Everyone has a clearer understanding of the laminate flooring. In addition, everybody can guarantee the quality of buying a well-known brand when purchasing laminate flooring. Don't buy groceries.
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Common specification of Steel Grating
1. Brief introduction of steel grating:
The steel Grating is also called steel grating, grating plate, steel grid plate etc. The steel Grating is to use steel according to certain spacing and cross arrangement, and welding for steel products with square lattice in the middle. The steel grating is a new type of building materials products, manufacturing technology from abroad. The steel grating is mainly used to do ditch cover, steel platform plate, steel ladder step plate. The bar steel grille plate commonly used by twisted steel, twisted steel specifications for 6mm, 8mm, 10mm and so on. The steel grating can be welded into different shapes according to drawings and specifications, in order to apply to different places such as open. Circular common, triangle equilateral trapezoid, cutting Angle and arc shape, so that the steel grid plate called special-shaped steel grating in our industry. The steel grid plate with carbon steel, carbon steel is generally Q235, in special industries Such as boiler rectification steel grid plate will use Q345 material. The steel grid plate surface is galvanized, can prevent oxidation. Also can be made of stainless steel. It is called Stainless steel grid plate when welded with stainless steel Flat Bar , stainless steel grid plate has the function with ventilation, lighting, cooling, skid proof, explosion-proof performance.
2. common specifications of steel grating:
1) longitudinal strip (Flat bar) distance: conventional 30,40,60 (mm); and non-standard spacing: 25,33,35/50 (mm) and so on.
2) horizontal stripe (Twist steel): normal spacing 50,100 (mm); and non - standard spacing: 38,76 (mm).
3) height 20~500 (mm)
4) thickness: 3-15 (mm)
There is various of the steel grid plate. A variety of occasions, environment, bearing requirements of the steel grid plate has different specifications, it is just these different plate spacing, height and thickness, the diameter of the connecting rod composed various steel grille plate specifications.
Below will be the introduction of different steel grating.. according to the marked graph can know all parts of different steel grating is what it looks like.
3. Standard Specification for steel grid plate
3. Classification of steel grid plate
1) According to the welding method can be divided into: welding steel grid plate (Figure 1), inserted a steel grid plate (Figure 2), Jack steel grating (Figure 3); pressure welding steel grid plate which needs large production pressure welding, pressure welding machine and verify that you have the strength of steel grid plate factory.
welding steel grid plate (Figure 1):
inserted a steel grid plate (Figure 2):
Jack steel grating (Figure 3):
2) According to the load of flat surface shape, can be divided into: flat steel grating (Figure 1), tooth type steel grating (Figure 2) and
"I" - shaped steel plate (Figure 3).
flat steel grating (Figure 1):
tooth type steel grating (Figure 2):
"I" - shaped steel plate (Figure 3):
3) According to their use can be divided into: general purpose steel grid plate, such as platform of steel grid plate, splicing steel grid plate and special purposes such as: trench cover (Figure 1), step plate (Figure 2).
trench cover (Figure 1):
step plate (Figure 2):
4. Steel grid plate according to the material is divided into: stainless steel grid plate ( Figure 1) and carbon steel grating plate. Stainless steel grid plate material usually has 304L, 316, carbon steel material for Q235, Q345A and so on.
stainless steel grid plate ( Figure 1):
5. Application of steel grid plate:
The steel grid plate is widely used in petroleum chemical industry, electric power, tap water, sewage treatment, port construction, modification, shipbuilding, self-propelled parking lot, municipal engineering, environmental engineering and other fields of the platform, walkway, trestle bridge, ditch cover, manhole covers, ladders, fence. Application of steel grille plate is very broad, Ladder step plate, cable trench cover, aluminum plate, ditch cover, the new building materials, steel grid plate is modernization plays an increasingly important role in the process of building. Above is a brief introduction of Steel grid plate for you. Please be free to consulte with us if there is any unclear for which kind of specification you can use in the actual situation. We can help you find the right steel grid plate specifications as per our rich production experiences.
Steel Grating
Steel Grating,Mild Steel Grating,Composite Steel Grating,Expanded Steel Grating
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