Surface wear resistance
Reinforced composite wood flooring should be ≥9000 rpm in public places and ≥6000 rpm in households. The above number of revolutions refers to the initial grinding value, that is, the surface of the surface layer is exposed, rather than the wear-resistant final value, that is, the floor is fully worn. The market is somewhat enhanced with composite wood flooring that has a high wear resistance, but it is likely to be the final wear value of the target.
Water absorption thickness expansion ratio
The water absorption thickness expansion ratio refers to the degree of increase in the water absorption thickness of the base layer after the immersed composite wood floor is immersed in water at 25 ° C for a period of time, expressed as a percentage. The greater the expansion ratio, the greater the strength decrease of the reinforced composite wood floor after damp, and the surface protrusion or even falling off, which seriously affects the service life. At present, the size of the water absorption thickness expansion rate of various brands on the market can differ by more than ten times.
Surface impact resistance
That is, the impact test is carried out on the reinforced composite wood floor by the prescribed method, and the diameter of the pit left after the impact is the basis of the impact performance. The smaller the diameter, the better the impact resistance and the longer the service life. The reinforced laminate flooring has a wear layer thickness of 0.1 mm or more and a thickness of 0.7 mm.
Formaldehyde emission
According to the provisions of GB18580-2001, the reinforced composite wood flooring is a product that can be directly used indoors, so the formaldehyde emission must reach the E1 level, that is, ≤0.12mg/L.
In addition to this, there are indicators such as static bending strength, internal bonding strength, density, moisture content, and bonding strength. The wear level and formaldehyde limit level of the reinforced laminate flooring should be clearly stated at the time of sale.
Chopped Graphite/Graphite Electrode in different materials have different definition of graphite pieces, some data and literature is not very big graphite particles are called graphite pieces (such as Graphite Powder) some is graphite products have a certain size, for Graphite Broken into patches, we here say of graphite for a second, usually called graphite blocks. Graphite is produced from graphitization and machining process of graphite products. It is used as additive and conductive material in the manufacture of graphite waste in steel and foundry industries, and can also be processed according to customer's requirements. They are also widely used in electric arc furnaces (steelmaking) and electrochemical furnaces (metallurgical and chemical industries).
Main use of graphite
Graphite pieces due to its low ash content, conductive and heat conduction performance is good, so there are a wide range of USES, can be added to the formula of less ash or dust products, graphite broken broken into small particles commonly use. Ingredients to add a certain amount of graphite, the plastic paste after kneading, especially during extrusion can reduce the friction resistance paste to squeeze the mouthpiece, to improve the coefficient of pressure type. Graphite pieces of coal adsorption properties of asphalt is better, to join the carbon block can rise to reduce the "short" waste (i.e., the product after roasting top produce honeycomb structure), and can improve the thermal conductivity of the carbon block and alkali corrosion resistance. The electrode paste used in hermetically-sealed thermal furnace is added to a certain amount of graphite to increase the conductivity and thermal conductivity of the electrode paste and accelerate the sintering speed of electrode paste. When the graphite is ground into small particles or fine powder, it is also used as raw material for the production of graphite chemical equipment (such as graphite-resin tubes). The graphite can also be used as a carbon addition agent for the electric furnace.
Graphite classification
1. Raw and broken. It is a raw blank that is not qualified after molding.
2. Roasting is the cutting debris that is recovered after the roasting of raw billet and after inspection of unqualified waste and the processing of calcined products.
3. The graphite is broken, and it is inspected by the graphite-producing waste and the cutting debris produced by graphite products in the process of processing.
Graphite Broken
Graphite Broken,Broken Graphite Electrode,Graphitized Anode Broken,Graphite Tablets
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