As polyurethane rigid foam (PU rigid foam) has the characteristics of light weight, good thermal insulation effect, convenient construction, etc., and also has excellent characteristics such as sound insulation, shock resistance, electrical insulation, heat resistance, cold resistance, solvent resistance, etc., it has been widely used at home and abroad. In aerospace, shipbuilding, petroleum, electronic equipment, vehicles, food and other industrial sectors.
The main uses of PU rigid foam are as follows:
1. Refrigeration equipment for household appliances and food industries
Refrigerators and freezers that use PU rigid foam as the insulation layer have a very thin insulation layer. Under the same external dimensions, the effective volume is much larger than when other materials are used as the insulation layer, and the weight of the appliance is also reduced.
Household electric water heaters, solar water heaters, and beer keg interlayers generally use rigid polyurethane foam insulation materials. PU rigid foam is also used in the manufacture of portable incubators for transporting biological products, medicines and food that require thermal insulation and preservation.
2.Industrial equipment and pipeline insulation
Storage tanks and pipelines are commonly used equipment in industrial production, and are widely used in petroleum, natural gas, oil refining, chemical industry, light industry and other industries. The shape of the storage tank is spherical or cylindrical, and the PU rigid foam can be constructed by spraying, pouring and pasting prefabricated foam. As a pipeline thermal insulation material, it is widely used for thermal insulation of pipelines in crude oil transportation pipelines and petrochemical industries, and has successfully replaced materials with high water absorption such as perlite.
3. Building materials
Housing construction is one of the most important application fields of PU rigid foam. In China, rigid foam has been popularized for thermal insulation and waterproofing of roofs of residential and office buildings, building Insulation material, and thermal insulation materials for cold room, grain depots, etc. The sprayed hard foam is used for the roof, and the protective layer is added, which has the dual effects of thermal insulation and waterproofing.
Rigid polyurethane sandwich panels are widely used in industrial plants, warehouses, stadiums, civil residences, villas, prefab houses and combined cold room, as roof panels and wall panels. Because of its light weight, heat insulation, waterproof, decoration and other characteristics, and convenient transportation (installation), fast construction progress, it is very popular among designers, construction and developers.
High-density (density 300~700kg/m3) PU rigid foam or glass fiber reinforced rigid foam is a structural foam plastic, also known as polywood. It can replace wood as various high-grade profiles, boards, sporting goods, decorative materials,furniture, mirror frames,trowel, bed headboard ,upholstery lighting accessories, and imitation wood carving crafts, etc., and the appearance and color of the products can be adjusted according to needs, which has a broad market prospect.The structural rigid foam made by adding flame retardant has much higher flame retardancy than wood.
Crown molding and plaster lines are both interior decorative lines, but the production materials and construction are different. PU lines are made of PU synthetic raw materials. It is formed by high-pressure foaming of polymer foam, and is made of rigid pu foam. This rigid pu foam is mixed with two components at high speed in the perfusion machine, and then enters the mold to form and form. Hard epidermis. Non-toxic and harmless, very environmentally friendly.
Crown moldings are not deformed, cracked, or rotted; corrosion resistance, acid and alkali resistance, and can maintain the stability of the material all the year round. No moth-eaten, no termites; no water absorption, no seepage, can be washed directly. High thermal insulation, is an excellent thermal insulation product, will not produce cold and heat bridges.
Clothing mannequins are a new application field in the polyurethane industry. Models are one of the essential items in a clothing store. They can dress up the store and display the highlights of the clothing. The existing clothing models on the market are made of fiberglass fiber, plastic and other materials. Fiberglass fiber has poor wear resistance, is relatively brittle, and has no elasticity. Plastics have defects such as poor strength and short life. The polyurethane garment model has the advantages of good wear resistance, good strength, elasticity, good cushioning performance, and high degree of simulation.
7.Other common application
In addition to the above applications, polyurethane rigid foam can also be used for door filling and theproduction of fish floating balls, etc.
Polyurethane foam filled door looks the same as any other door, however, the inner structure is completely different. Usually the paint-free door is hollow inside, or filled with honeycomb paper, while the polyurethane rigid foam-filled door is not only very green and environmentally friendly, but also strengthens the toughness of the door frame, making the door very strong and strong, whether it is heavy object pressure, water bubbles, Whether it is burned in the fire, it can ensure that it will never be deformed. This technology eliminates composite doors,Wooden doors are prone to problems such as deformation and moisture.
Post time: May-07-2022