1. Original bamboo inspection
Bamboo flooring is generally made of bamboo, but the mechanical properties of bamboo are closely related to the age of bamboo and the location of the bamboo. The age of bamboo is less than 4 years. The degree of lignification of the internal components of bamboo is not enough, the strength is unstable, and the shrinkage and swelling rate are large. More than 5 years of bamboo should be used. Bamboo generally has a thick root wall and a thin tip wall. Therefore, a rod-shaped straight fresh bamboo having a breast diameter of more than 10 cm and a wall thickness of 7 mm or more is generally used as a raw material.
2, cut off
Bamboo is thick and thin at the top. The bamboo tube is divided according to the degree of wall thickness and cut into a prescribed length.
3, punching
Cut the original bamboo into regular bamboo strips
4 initial planing
After drying, the bamboo strips need to be shaved by four sides to remove the residual bamboo green, bamboo yellow and the blade marks left by the rough planing. After this treatment, the bamboo strips and the bamboo strips can be glued very firmly without cracks. , no cracking, no stratification. After the bamboo strips are finished, they should be sorted to remove the bamboo strips whose processing size does not meet the requirements and the color difference is removed from the production line.
Preliminary treatment of the surface of the bamboo strip. The surface is shaved to yellow, that is, the bamboo and bamboo parts are removed, leaving only the middlemost coarse fiber layer. The traditional bamboo products are made by bending the entire cylindrical bamboo into a prescribed shape. The bamboo green is not the same as the bamboo, and the density of the bamboo skin is different from that of the coarse fiber. The shrinkage deformation rate under the same dry humidity condition. Different, so it is easy to cause cracking. Bamboo yellow is also the bamboo meat part of the inner wall of the bamboo tube. The nutrients such as sugar are high, and it is easy to be infected with mold without removing it.
In terms of thickness, since the bending strength of the bamboo itself is higher than that of the wood, the 15 mm thick bamboo floor has sufficient bending, compressive and impact strength, and the foot feel is also good. Some manufacturers to cater to the consumer's thicker and better mentality, do not go green, do not go yellow, bamboo glue, although the thickness of bamboo flooring can reach 17mm, 18mm, but the bonding strength is not good, but it is easy to crack. The quality of the bamboo flooring is the bamboo green and bamboo yellow coarsely shaved after the two sides, in order to make the bamboo sheet assembly glue tight, but also to plan it, the thickness and width tolerance should be controlled within 0.1mm The adhesive used for adhering the bamboo blank will also cure rapidly under the action of high temperature, and the glue is extremely strong. 5, cooking bleach or carbonization
Bamboo has the same chemical composition as wood, mainly cellulose, hemicellulose, lignin and extracts. However, bamboo contains more protein, sugar, starch, fat and wax than wood. Under the condition of suitable temperature and humidity, it is easily eroded by insects and fungi. Therefore, bamboo strips need to be cooked after rough shaving (natural color) ) High-temperature and high-humidity carbonization (brown color), remove some sugar, starch and other extracts, add insecticides, preservatives, etc. during treatment to eliminate the breeding of insects and fungi.
The natural floor is bleached with hydrogen peroxide at a temperature of 90 ° C. The roots have different wall thickness bleaching times. 4~5mm3.5 hours, 6~8mm4 hours.
The carbon floor is processed by a secondary carbonization process under high temperature and high pressure.
The secondary carbonization technology carbonizes the eggs, fat, sugar, protein and other nutrients in the bamboo to make the material light, and the bamboo fibers are arranged in a "hollow brick" shape, which greatly improves the tensile strength and waterproof performance.
6, drying
The moisture content of the cooked bamboo pieces exceeds 80% and reaches a saturated state. The moisture content of bamboo directly affects the stability of the finished product size and shape after processing bamboo. In order to ensure the quality of bamboo flooring products, the bamboo raw materials used for processing need to be fully dried before gluing. At present, bamboo drying is carried out by drying kiln or orbital drying kiln.
The moisture content of bamboo needs to be controlled according to the climate conditions and the environment in which it is used. For example, the moisture content of the control of the north and the south of China is different. The moisture content of the products used in the north is very low. Under normal circumstances, it should be controlled at 5-9%.
The bamboo elements of the bamboo flooring are required to have a uniform moisture content. For example, the bamboo chord floor (flat plate) requires that the moisture content of the bamboo layer of the surface layer, the middle layer and the bottom layer be uniform, so that it is not easily deformed and bent after being produced into a bamboo floor.
This is also an important part of preventing cracking of the floor. The water content is not uniform or the water content is too high. When the environmental factors such as temperature and dry humidity are changed, the floor may be deformed or cracked. The water content is set according to the air humidity condition of different regions. The floor thus produced is guaranteed to adapt to the corresponding climate.
The high-quality floor is tested after six-point multi-face inspection to ensure that each piece of bamboo strips, as well as the head and tail of the bamboo strips, have a uniform moisture content in the surface, so as to ensure that the floor is cracked due to different humidity environments. It is difficult for consumers to simply determine the water content. The safer way to solve this problem is to choose a reputable regular bamboo flooring manufacturer that can produce blanks.
7, fine planing
Bamboo strips are made into the required specifications
8, selection
Sort the bamboo strips into different levels.
9, glue recompression
Gluing and bundling: Select high-quality environmentally friendly adhesives, apply glue according to the specified amount of glue and apply evenly, and then combine the bamboo strips according to the required specifications.
Hot pressing gluing: hot pressing is a key process. Under the specified pressure, temperature and time, the slab is glued into a blank. The surface finish of the bamboo strip, the adhesive and the hot pressing conditions have a great influence on the bonding strength of the bamboo floor.
The bonding strength of bamboo flooring is different from that of wood flooring. It is made by pressing multiple pieces of bamboo. The quality of the glue, the temperature of the glue, the pressure and the time of holding and holding the pressure all have an effect on the quality of the glue. If the bonding strength is insufficient, the deformation may be cracked. An easy way to check the bond strength is to put a floor in water to soak or cook. Compare the degree of expansion, deformation and gel opening and the time required. Whether the bamboo floor will be deformed or degummed has a great relationship with the bonding strength.
10, the head
11, test board color separation
12, trimming
13, trimming for the mother
14. When producing the anti-seesaw, the shorts must turn around.
15, sanding
Treat the surface of the blank to make the surface smooth and thicken the plain board
16, open
Moulders
The bottom and side of the bamboo plate are open.
Double-ended
Bamboo flooring is slit longitudinally and laterally.
Opening is also commonly known as slotting, which is the concave and convex slot when the floor is spliced. This is the key to ensure the perfect splicing of the floor. The gap between the two floors is tight when the precision stitching is opened.
17, paint
In order to prevent the moisture in the surrounding environment from invading the bamboo floor and to make the board surface resistant to pollution, abrasion, decoration, etc., the bamboo floor needs to be finished. Generally, after the 5th (paint) 2 surface (paint) is painted, the surface of the bamboo floor has been covered with a thick protective film. The hardness of the paint film is not as hard as possible, and it should be moderately soft and hard to ensure that the paint film has certain abrasion resistance, scratch resistance and toughness.
Paint on the surface of the bamboo floor. The floor on the market is divided by light and semi-matt. The bright light is the coating process, which is very bright but its face has been worn and peeled off, and should be carefully maintained during use. Matte and semi-matt are roller coating processes with soft color and strong paint adhesion.
At present, there are five bottoms, two bottoms and two sides on the market. When choosing a primer, it is safe and environmentally friendly. It not only maintains a healthy home environment, but also achieves beautiful, waterproof and pest-proof. To ensure good paint adhesion, it is necessary to sand a layer of paint. After repeated sanding and painting, the surface of the finished floor can be smooth and smooth without bubbles.
18, finished product inspection
Inspect the finished product. Adhesion, surface effect, abrasion resistance and gloss.
In order to ensure the cutting-edge quality of the floor, the European and American markets have implemented film inspections, and many domestic companies have used this inspection technology. Of course, the relative cost is higher.
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