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Views:13 Author:Site Editor Publish Time: 2020-11-25 Origin:Site
The formation of polyurethane foam needs to go through two stages of foaming and curing. From the beginning of the mixing of the black and white materials to the stop of the foam volume expansion, this process is called foaming. During the foaming process, the system releases a large amount of reaction heat. The rigid foam polyurethane (PU) insulation material is a polymer with repeating structural units of urethane segments made by the reaction of isocyanate and polyol. Because of its good thermal insulation performance and excellent waterproof performance, it is widely used in external wall thermal insulation, roof thermal insulation, cold storage, grain storage, archives, pipes, doors and windows and other special parts of insulation. Polyurethane foaming equipment is used in roof and wall insulation by Dali abroad. The main application forms are composite board villages and on-site spraying. High pressure spray, strong penetration force, make the paint penetrate into the wall gap, increase the mechanical bite force between the coating and the wall, improve the paint adhesion, extend the coating life, the coating is denser, the adhesion is improved, and the spraying ability is higher. The viscosity of the coating does not need to add water excessively, so the physical properties of the coating can be maintained intact, and the life of the coating can be effectively extended.
The waterproof performance of rigid polyurethane foam, continuous jointless characteristics and no adhesive process ensure the better wind pressure resistance of the cavity-free wall, and block the anti-alkali pathway of the wall caused by the capillary tube. Existing board thin paste system and polystyrene particle slurry system must strictly prevent the moisture hazards caused by the cracks on the cover. The polyurethane foaming machine can use the traditional cement mortar surface layer and other surface materials, which will not cause heat preservation. The thermal insulation performance decline caused by material moisture and the hidden danger of adhesive moisture.
For more information on polyurethane, please continue to pay attention to the polyurethane manufacturer Hightop Machinery.
On April 21, the first Taishan Industrial Exhibition kicked off at the Taishan International Convention and Exhibition Center. The Taishan Industrial Exhibition adopts the "Trinity" model, that is, the "online platform, fixed exhibition hall, and offline exhibition" model. The promotion of the indus
o provide the security industry with important information such as development scale, speed, industrial concentration, product structure, ownership structure, regional structure, product prices, benefit status, etc., and for the security industry to study and predict the development trend of securit
1. Site selection skills The location of the thermal insulation house of the breeding farm should be a place with a leeward wind and sunny, high terrain and dry soil. 2. Alternative insulation materials for the insulation room of the farmExtruded polystyrene foam (extruded board), molded polystyr
What are the classifications of high-pressure mixing spraying machinery for thermal insulation materials1. The important role of the on-site polyurethane high-pressure mixed foam external wall insulation systemPolyurethane rigid foam external wall insulation system is a kind of external wall insulat
is mostly used in building boards and insulation walls, mainly for heat preservation and waterproofing. The equipment used to complete the polyurethane foaming process is a polyurethane high-pressure foaming machine.The overall layout of the polyurethane foaming machine fully considers the use of sp
For many new products and technologies, only those that have passed theoretical and practical tests are worth recommending. The same is true for polyurethane products. It is recommended that you weigh the relationship between price and value when purchasing polyurethane products. The self-discipline
Polyurea as a new type of environmentally friendly spraying Compared with traditional environmentally friendly coating technology, spraying polyurea elastomer technology has the following advantages:1. It does not contain catalyst, it cures quickly, and can be sprayed on any curved surface, inclined
Polyurethane rigid foam is a material with a large amount of flexible deformation. It has strong resistance to external deformation. It is not prone to cracks under the action of external force, temperature deformation, dry and wet deformation, etc., effectively ensuring the stability and durability
In recent years, China has made innovations in wall insulation materials, especially civil engineering exterior wall insulation systems, exterior wall decoration fire protection systems, etc., and proposed the combination and selection of high-performance insulation materials, but they have achieved
Excellent performance characteristics of polyurethane elastomer: We are a manufacturer mainly engaged in the research, development and production of castable polyurethane elastomer products. Because of the best comprehensive performance, the output of castable polyurethane accounts for more than 60
