Testing of Sand Control Materials for Railway EngineeringHow to apply for a report? What items need to be tested? We will conduct testing and evaluation in strict accordance with the standards. We can also provide personalized testing plans and reports according to your needs.

Compared with the traditional grass squares used for sand prevention and control, using biodegradable organic and inorganic composite materials such as high-density polyethylene and super absorbent fibers for sand prevention and control not only has the advantages of long lifespan, aging resistance, and reusability, but also has good heat and cold resistance, good chemical stability, and very obvious sand control and fixation effects. High density polyethylene forms a 'U' shaped sand fixation groove surface in a series of grids, where sand falls and is naturally adsorbed and solidified, which is conducive to the fixation of sand dunes. High density polyethylene (HDPE) is a white powder or granular product. Non toxic, odorless, with a crystallinity of 80-90%, a softening point of 125-135 ℃, and a usage temperature of up to 100 ℃; The hardness, tensile strength, and creep resistance are better than those of low-density polyethylene; Good wear resistance, electrical insulation, toughness, and cold resistance; Good chemical stability, insoluble in any organic solvent at room temperature, resistant to corrosion by acids, alkalis, and various salts; The film has low permeability to water vapor and air, and low water absorption; The aging resistance is poor, and the environmental stress cracking resistance is not as good as that of low-density polyethylene, especially due to thermal oxidation. Therefore, antioxidants and ultraviolet absorbers need to be added to the resin to improve this deficiency. High density polyethylene film has a lower thermal deformation temperature under stress, and attention should be paid when applying it. Test items: Physical properties: density, thickness, size, water absorption, toughness, etc; Mechanical properties: hardness, stiffness, elastic modulus, elongation at break, friction performance, tensile and compressive strength, etc; Thermal performance: thermal stability, melting temperature, coefficient of expansion, oxidation index, etc; Environmental performance: acid resistance, alkali resistance, salt resistance, solvent resistance, etc; Aging test: resistance to high and low temperatures, salt spray test, UV aging, thermal aging performance, etc; Physical and chemical properties: biocompatibility, degradation performance, apparent density, transparency, haze, yellow index, whiteness, swelling ratio, water content, acid value, specific gravity, hardness, rigidity, density, resin content, water absorption, dimensional stability, etc; Mechanical properties: impact performance, tensile performance, bending performance, electrical performance, wear resistance, friction coefficient, low-temperature performance, rebound performance, tear performance, creep, three comprehensive tests, vibration, impact, fatigue, stress relaxation, etc; Fire performance: fire rating, vertical combustion, horizontal combustion, smoke density, smoke toxicity, oxygen index, flame spread rate, etc; Environmental reliability: lifespan, aging test (UV, xenon lamp, carbon arc lamp, ozone), salt spray test, oil resistance and other liquid tests, high and low temperature impact, high and low temperature cycling, etc; Electrical properties: surface resistivity, volume resistivity, breakdown voltage, dielectric constant, loss tangent, etc

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