The company solemnly promises: free on-site installation and commissioning of the entire machine, free training of technical staff, one year warranty and lifetime maintenance!
  • ●详解聚氨酯发泡机操作规程 [05-07] ● Detailed operation rules of polyurethane foaming machine
  • ●哪些因素会影响聚氨酯发泡质量 [05-07] ● What factors will affect the quality of polyurethane foam
  • ●喷涂硬泡聚氨酯外墙防水保温施工流 [05-16] ● Waterproof thermal insulation construction flow for spraying rigid foam polyurethane exterior
  • ●必看! [05-10] ● Must see! The relationship between waterproof coating thickness and waterproof life
  • ●异氰酸酯与聚脲弹性体性能的关系 [08-17] The relationship between isocyanate and polyurea elastomer performance
  • ●「聚氨酯产品」地铁防水工程复合防 [07-24] ● "Polyurethane Products"
  • ●保温材料阻燃性能不合格成冷库安全 [05-05] Insufficient flame retardant performance of insulation materials to become safe in cold storage
  • ●温度控制是解决聚氨酯发泡机的空泡 [05-08] ● Temperature control is to solve the cavitation of polyurethane foaming machine
  • ●购买防水涂料需要重点关注的性能指 [05-10] ● The performance indicators that need to focus on when buying waterproof coatings
  • ●使用聚氨酯喷涂机白料时要细致什么 [05-10] ● What to be careful when using polyurethane sprayer white material
  • ●聚氨酯发泡机混合器中物料的流场分 [05-18] ● Flow field analysis of materials in mixer of polyurethane foaming machine
  • ●聚氨酯保温材料行业未来发展前景可 [05-12] ● The future development prospects of polyurethane thermal insulation material industry are promising
  • ●如何在屋顶操作聚氨酯喷涂 [09-10] ● How to operate polyurethane spray on the roof
  • ●怎么解决聚氨酯发泡机空泡现象 [05-08] ● How to solve the cavitation phenomenon of polyurethane foaming machine
  • ●现代建筑工地为什么要用【聚氨酯发 [03-21] ● Why use modern polyurethane construction site
  • ●聚氨酯喷涂作业时“应该”和“不应 [10-29] ● "should" and "should not" when spraying polyurethane
  • ●影响聚氨酯喷涂施工出方率的几个因 [10-29] ● Several factors affecting the yield of polyurethane spraying construction
  • ●聚氨酯喷涂施工的常见问题及原因 [10-29] ● Common problems and reasons of polyurethane spraying construction
  • ●聚氨酯防腐应用以及储存 [10-21] ● Application and storage of polyurethane anticorrosion
  • ●聚氨酯防腐漆在出现剥落现象 [10-21] ● The polyurethane anticorrosive paint is peeling off
  • ●聚氨酯防腐的主要涂覆方法 [10-21] ● Main coating methods for polyurethane anticorrosion
  • ●聚氨酯防腐的涂装工艺 [10-21] ● Polyurethane anticorrosive coating process
  • ●如何提高聚氨酯防腐的性能 [10-21] ● How to improve the anticorrosive performance of polyurethane
  • ●聚氨酯防腐适用领域以及特点 [10-21] ● Application areas and characteristics of polyurethane anticorrosion
  • ●聚氨酯高压喷涂设备的主要优点 [10-19] ● Main advantages of high pressure polyurethane spray equipment
  • ●聚氨酯发泡机选购前的对比方法 [09-19] ● Comparison method before purchasing polyurethane foaming machine
  • ●聚氨酯发泡机特点和工作流程介绍 [09-19] ● Introduction of polyurethane foam machine characteristics and work flow
  • ●聚氨酯高压发泡机和低压发泡机的区 [08-08] ● The area of polyurethane high pressure foaming machine and low pressure foaming machine
  • ●「耐高温材料」聚氨酯硬泡的发展方 [07-25] ● Development method of "high temperature resistant material" polyurethane rigid foam
  • ●「ws15」喷涂型聚氨酯应用指南 [07-25] ● "ws15" Spraying Polyurethane Application Guide
  • Comparison of soft foam polyurethane and rigid foam polyurethane
    来源:http://motokone.com发布时间: 2018-09-07 09:21 Author: Polyurethane foam machine Source: http: // Published: 2018-09-07 09:21
    1. Different foaming mechanisms
    Rigid foam polyurethane is a two-component liquid (commonly known as black and white materials). After fully mixing, it produces a rapid chemical reaction and cures (tens of seconds to minutes). It foams under the action of additives such as foaming agents, catalysts, foam stabilizer It forms a lightweight foam with a high closed cell ratio> 90% and a reticulated structure, which is a thermoset foam.
    Polystyrene foam (EPS, XPS) is a foam body that is swelled by heating of granules or powders, and the foaming agent vaporizes. The foam is formed by a mold or an extrusion machine. It has a granular structure and belongs to thermoplastic foam. Higher sensitivity, potential for secondary foaming.
    2. Different physical and chemical properties of foam
    ① Thermal insulation performance
    Polystyrene foam has better thermal insulation, but λ value is still relatively large compared to rigid foam polyurethane, such as EPS board λ≈0.04w / k · m, XPS board λ≈0.031 w / k · m, and PUR board λ≈0.022 w / k · m. Under the premise of the same energy saving index, the thickness of the insulation board can be reduced, and the quality stability of the insulation system can be improved.
    ② Thermal stability
    The thermal stability of rigid foam polyurethane can be as high as 120 ℃, while the styrene board is only 70 ℃. In summer in China, the temperature of the external surface of the external wall is generally 70 ° C or more. Such a temperature can easily cause the secondary foaming of the benzene board, resulting in cracks in the board seam.
    ③ Surface binding energy
    Polyurethane molecular chains have a certain -OH bond, that is, a hydrophilic gene, which is easy to bond with cement-based slurry, while polystyrene has no -OH bond, which is a hydrophobic material, and its surface is difficult to bond with cement-based slurry, etc. Inorganic materials are fused, which is also one of the main reasons for cracking, bulging, and falling of the benzene board external insulation system.
    ④, combustion theory
    Rigid foam polyurethane is a thermosetting material, which will form a carbonized layer after being heated and burned, blocking the further penetration of heat and oxygen, hindering the further combustion of the foam, and is unlikely to cause fire spreading accidents. Polystyrene foam is a thermoplastic material, which shrinks and melts after being heated, and then drips and burns. It cannot produce a carbonization barrier layer, and it is easy to cause flame spread and blaze accidents.
    ⑤, corrosion resistance
    Polyurethane is resistant to water, oil and solvents. Polystyrene is resistant to water but not to solvents. It is extremely sensitive to benzene and ester solvents and is prone to rapid corrosion.
    3. Different application methods
    Polystyrene foam can only be molded and extruded in the factory state, while rigid foam polyurethane can be sprayed, poured and factory foamed. Therefore, the application methods and application fields are more diverse and convenient than polystyrene foam. .