First, judge the appearance quality of the floor with the naked eye and hand touch
1. Floor surface selection
Hand the floor in a bright place, and see if there are any defects such as cracking, dead knot, pinhole, knot hole, mildew, etc. on the surface. Here, for small knots, the color difference should not be too demanding. Because this is a natural property of wood.
2. Board paint quality selection
Hold the lacquered board and place it obliquely in the bright place. Check whether the paint film is full and even from the end face of the board, and whether there are wavy needle-shaped indentations.
3. Floor processing precision selection
The quality of the floor is directly affected, which directly affects the quality of the laying. Usually, more than 5 floors are placed on the glass table or the flat floor in the same packaging box. Leveling, and then seeing whether the joints are combined or not, it should be proposed here, not too tight, because the four seasons in the north are distinct, if it is too tight, the humidity will increase slightly during installation, and it will be difficult to enter when the groove is combined. .
Second, the intrinsic quality of the floor
Intrinsic quality is a key indicator of composite floor parquet. It is generally difficult to determine by sensory and often with test data.
1. Moisture content
Moisture content is the main condition for floor deformation. Therefore, the selection must be close to the local water content, and the Beijing area is around 11%. This value is best measured by a measuring instrument. If you can't measure it, you can also touch it with your hand. If the hand feels cool, uncomfortable and sticky, the moisture content will be high.
2. Formaldehyde emission
This indicator is an indicator directly harmful to the health of consumers. China's national standard has clearly stipulated that if the measurement is less than 40mg/100g below the national standard by the perforation extraction method, it can usually be determined experimentally. Therefore, the test data can be obtained from the operator. You can also use a simple and rough method to open one of the boxes, take out the floor, put your nose close to the floor, smell it, and if you smell a strong pungent smell of formaldehyde, the formaldehyde concentration in the air has exceeded the standard.
In addition to the above technical indicators, it should also be observed:
1. Gluing properties --- dip peeling and gluing strength, the gluing quality can be glued to the hand to see if it has peeling and delamination.
2. Modulus of elasticity and static bending strength
These two indicators are indicators that reflect the mechanical properties of the floor. This value can only be reflected by the measured data.
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