Features (1) non-conductive, the appearance of new, beautiful (2) corrosion resistance (with acid and alkali resistance, organic solvents and salts, and many other gas, corrosive liquid medium can, according to the actual use where required, can be economically selection Use phthalic type, isophthalic type, vinyl resin matrix material), resistant to frail, fade-resistant (3) Light weight, easy handling (4) low water absorption, flame retardant (ordinary grill flame retardant propagation rate (ASTM E-84) does not exceed 25; flame retardant vinyl grill senior propagation rate does not exceed 10. The oxygen index of not less than 28 (GB 8924)) (5) high-strength insulation ladder, lightweight (FRP grating 1/4 insulation ladder quoted density is not greater than 2, only steel, aluminum 2/3 to 10 times the strength of rigid PVC, the absolute intensity level than ordinary aluminum and steel), impact insulation resistance, permeability good. Inventive principles electronic band theory that electrons in solids present in only allows only a certain energy state, and the energy state may be formed separated from each other band. Energy electrons tend to occupy the lowest price band insulation ladder, ladder insulation valence band is at absolute zero can be filled with the energy of the highest energy band in the top of the valence band band called conduction band, valence band and the conduction band the gap is referred to as the energy gap. Above absolute zero, the valence band is excited electronic parts and transition to the conduction band, becoming the conduction band electrons and valence band holes left. According to band theory, be able to fill or empty with electronic band does not contribute to conductivity, electrical conductivity derived only half full band, conduction band electrons and valence band holes collectively known as carriers. Metallic conduction band is partially filled, so there is a good electrical conductivity. For semiconductors and insulation ladder, insulation ladder at absolute zero degrees valence band is filled, but there is no conduction band electrons. At room temperature, the semiconductor due to a smaller energy gap, can be formed by thermal excitation of electron-hole pair, which has a certain conductivity. In contrast, the vast majority of insulation ladder generally has a very large band gap width of the insulating joint ladder, is difficult valence band electrons are excited to the conduction band, and therefore the carrier concentration is extremely low insulation ladder, correspondingly conductivity is very low, or This material insulation. Insulation ladder type, Yang Yuan Machinery (certified), Kaifeng insulation ladder provided by Yang Yuan Machinery Co., Ltd. Xinxiang City. Xinxiang City, Yang Yuan Machinery Co., Ltd. (www.xxyy001gs.com) Henan Xinxiang, fence, fence, network leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Yang Yuan Machinery leadership in the staff warmly welcome all inquiries negotiations to create mechanical Jan far a better future.