FRP doors and windows are internationally known as the fifth generation of door and window products after wood, steel, aluminum and plastic. It has both the solidity of aluminum alloy and the heat preservation and anti-corrosion of plastic steel doors and windows. It has its own unique characteristics: colorful Beautiful, stylish, no swelling in the sun, no shrinkage in the cold in winter, no metal reinforcement, anti-aging, and the same life as the building (about 50 years). The unique material structure of FRP doors and windows makes it have certain excellent properties. First, lightweight and strong The density of FRP profiles is about 1.7g/cm3, which is about 1/4 of the density of steel, 2/3 of the density of aluminum, but the strength is very large, the hardness is 35, the tensile strength is 350-450MPa, and ordinary carbon. The steel is close, the bending strength is 200 MPa, and the bending elastic modulus is 10000 MPa, so the steel lining reinforcement is not required. Second, corrosion resistance FRP doors and windows have good resistance to acid, alkali, salt and most organic matter, sea water and moisture, and also have resistance to microbial action. FRP doors and windows are stainless and immortal, and the corrosion resistance is superior to other materials. Especially suitable for rainy, humid and coastal areas, as well as corrosive places. Third, the sound insulation is remarkable FRP doors and windows have a sound insulation value of 36, plastic steel is 16 and aluminum alloy is 12, and FRP doors and windows are particularly suitable for downtown areas. Fourth, fatigue resistance The fatigue damage of metal materials is often a sudden failure without obvious omen, and the interface between the fiber and the matrix in FRP can prevent the crack propagation of the material due to the force, so the FRP material has a strong fatigue strength limit, thus ensuring the FRP. Safety and reliability of energy-saving doors and windows. Five, good electrical performance Glass doors and windows are good insulating materials with a resistivity of up to 1014 ohms and can withstand higher voltages without damage. It is not affected by electromagnetic waves, does not reflect radio waves, and has good wave transmission. Therefore, FRP doors and windows have special uses for buildings of communication systems. Sixth, good sealing performance The coefficient of linear expansion of FRP is lower than that of steel and aluminum alloy, which is 1/20 of that of plastic steel. It is similar to the expansion coefficient of the wall. Therefore, when the temperature changes, the FRP doors and windows will not create a gap with the wall, nor will it be with the sash. Produces gaps for areas with high winds, dust, and pollution. Seven, good weather resistance FRP is a thermosetting plastic. After cross-linking, the resin forms a three-dimensional network structure and becomes insoluble. It does not melt even when heated. FRP profile deformation temperature is above 200 degrees, high temperature resistance performance, better than low temperature resistance, because with the decrease of temperature, the molecular motion is decelerated, the distance between molecules is reduced and gradually fixed at a certain position, and the intermolecular attraction is strengthened. This shows that the FRP doors and windows can be used for a long time in environments with large temperature changes. Eight, good shock absorption Due to the high modulus of elasticity of the FRP profile, the door and window structure made of the frame has a high natural frequency, and the high natural frequency can avoid the early damage caused by the resonance of the structural member under working conditions. At the same time, the resin and fiber interface in FRP has the ability to absorb vibration, which makes the vibration damping of the material high. This feature is beneficial to improve the service life of FRP doors and windows. It can be used for 50 years under normal use conditions, and it also provides protection for the harsh environment of FRP doors and windows. Nine, rich in color FRP doors and windows can be painted with various colors according to the needs of different customers, interior decoration and architectural style to meet the individual aesthetic needs of people. Concerned about surprises Label: Nine characteristics of FRP doors and windows Previous: The use of stainless steel cutlery Next: The three principles of home design According the materials, the Nonwoven Needle Punched Felt widely divided into: Polyester Felt, Wool Felt, Polyester and wool mix Felt , Polypropylene Felt, viscose felt and Aramid felt. Nonwoven Needle Punched Felt Nonwoven Needle Punched Felt,Needle Felt,Polyester Felt,Wool Felt,Color Felt HUATAO GROUP LTD , https://www.huataogroup.com
Accordging the application, the nonwoven needle punched felt can be divided in to: Industrial Felt, Polished felt, Oil absorbing felt, Craft felt, Civil felt and so on