DSM NeoResins has successfully developed NeoRez R-9407, a new polyurethane dispersion that is primarily used in floor coatings. NeoRez R-9407 uses a waterborne, self-crosslinking aromatic amino technology to ensure fast curing of one-component wood floor finishes. This innovative coating resin not only provides excellent finish and excellent rub resistance for floor coatings, but it also boasts high gloss and moisture resistance and is second to none in its class. Even more worth mentioning is the same durability and amber effect as the traditional solvent-based product.
NeoRez R-9407 meets VOC environmental requirements. NeoRez R-9407 will be able to meet the demanding requirements of end consumers in the increasingly environmentally-friendly future of the coatings industry.
NeoRez R-9407 meets VOC environmental requirements. NeoRez R-9407 will be able to meet the demanding requirements of end consumers in the increasingly environmentally-friendly future of the coatings industry.
The role of the valve is specifically responsible for the input of air into the engine and exhaust the exhaust gas after combustion. From the engine structure, it is divided into intake valve and Exhaust Valve.
The role of the intake valve is to draw air into the engine and mix it with the fuel to burn; The function of the exhaust valve is to discharge the exhaust gas after combustion and dissipate heat.
The valve is composed of a valve head and a rod. The valve head temperature is very high (intake valve 570~670K, exhaust valve 1050~1200K), but also withstand the pressure of the gas, the valve spring force and the transmission component inertia force, its lubrication, cooling conditions are poor, requiring the valve must have a certain strength, stiffness, heat and wear resistance.
The intake valve is generally made of alloy steel (chromium steel, nickel-chromium steel), and the exhaust valve is made of heat-resistant alloy (silicon chromium steel).
Sometimes in order to save heat resistant alloy, the exhaust valve head is made of heat resistant alloy, and the rod is made of chromium steel, and then the two are welded together.
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