Polyurethane Materials Application Scope

Polyurethane Materials Are Widely Used In Wear-Resistant Transportation Engineering And External Thermal Insulation Materials. Different Types Of Polyurethane Materials Can Be Produced According To Different Environment And Characteristics.
The Largest Output Of Polyurethane Foam Products, The Relative Density Is Mostly Between 0.03 And 0.06, And The Thermal Conductivity Of Rigid Foam Is Only About 40% Of Cork Or Polystyrene Foam. It Has Enough Strength, Oil Resistance And Adhesive Ability. It Is a Good Shockproof, Thermal Insulation And Sound Insulation Material. It Is Widely Used In Home Appliances Thermal Insulation (Fridge, Freezer, Water Heater, Solar Water Heater). Heat Pump Water Heater, Beer Fresh-Keeping Barrel, Incubator, Etc.), Equipment Insulation (Heat Supply Pipeline, Crude Oil Chemical Pipeline, Tank Body, Refrigerated Transportation, Bus Insulation, Etc.), Building Energy Conservation (External Wall Insulation, Roof Waterproof Insulation, Cold Storage, Building Board, Anti-Theft Door / Garage Door, Rolling Shutter Door, Etc.) And Other Heat Insulation Fields, As Well As Packaging, Decoration (Decorative Board, Imitation Wood Furniture Arts And Crafts, Etc. Polyurethane Flexible Foam Is Good In Elasticity And Is Also Ideal Cushion And Mattress Material.

Polyurethane Rubber Is Divided Into Three Types According To Its Processing Methods: Mixing Type, Thermoplastic Type And Casting Type. The Mixed Raw Rubber Is Saturated Or Has a Small Amount Of Double Bond Hydroxyl Terminated Polyurethane, Which Can Be Processed And Molded By The Processing Method Of Ordinary Rubber, And The Yield Is Small. Thermoplastic Rubber Has Two Kinds: Full Thermoplastic And Semi Thermoplastic. The Former Has Linear Structure, While The Latter Has a Small Amount Of Crosslinking. They Can Be Molded With Thermoplastic Processing Methods And Equipment. The Casting Type Rubber Usually Adopts Liquid Prepolymer And Chain Extender To Mix Quickly And Then Cast Or Spray, So It Has Strong Adaptability. At Present, About Two-Thirds Of Polyurethane Rubber Products Are Molded By Casting Method. In Recent Years, The Reaction Injection Molding Technology, Which Can Be Directly Injected From Liquid Monomer To Rapid Reaction Molding, Has The Advantages Of High Production Efficiency, Less Equipment Investment And Good Product Performance.

Polyurethane Coating Is Divided Into Two Components And One Component: Two Component Polyurethane Coating Is Polyether Type, Which Is Directly Mixed With Polyisocyanate And Polyether Solution; One Component Polyurethane Coatings Are Unsaturated Polyester Type, Including Oil Modified Type, Moisture Cured Type And Closed Type. Polyurethane Coatings Are Constructed By Spraying, Electrodeposition And Impregnation. The Coating Is Wear-Resistant, Resistant To Gasoline, Grease, Water And Inorganic Acid Vapor, With High Insulation And Adhesion, Long-Term Bright Color.

Polyurethane Adhesive Generally Consists Of Two-Component System Of Polyisocyanate And Hydroxyl Containing Polyester Compound. It Can Contain Curing Initiator, Powder Filler (Titanium Oxide, Zinc Oxide, Cement), Solvent (Acetone, Ethyl Acetate, Chlorohydrocarbon). The Two Components Were Mixed Directly Before Application, And The Storage Period Was 1-3 H. The Curing Time Is Not Less Than 24 Hours At Room Temperature, Or 1-3 Hours At 100-150 ℃ And Pressure To 0.03-0.05 Mpa. This Kind Of Adhesive Has High Adhesive Force With All Kinds Of Materials. After Curing, It Is Stable To Water, Mineral Grease, Fuel, Aromatics And Atmosphere. The Working Temperature Is - 200 ~ 120 ℃, And The Price Is Expensive. It Is Used In The Connection Of Metal, Plastic, Glass And Ceramic Structures Of Aviation, Space Technology, Construction And Machinery, As Well As The Copy Material Of Polymer Film, And The Bonding Of Sole And Vamp.