What is Polyurethane Insulation?

Polyurethane is the abbreviation of polyurethane. Its English name is polyurethane, which is a kind of polymer material. Polyurethane is an emerging organic polymer material, known as the "fifth largest plastic", and is widely used in many areas of the national economy because of its excellent properties. Product applications include light industry, chemicals, electronics, textiles, medical, construction, building materials, automotive, national defense, aerospace, aviation, etc.

Polyurethane is the abbreviation of polyurethane. Its English name is polyurethane, which is a kind of polymer material. Polyurethane is an emerging organic polymer material, known as the "fifth largest plastic", and is widely used in many areas of the national economy because of its excellent properties. Product applications include light industry, chemicals, electronics, textiles, medical, construction, building materials, automotive, national defense, aerospace, aviation, etc.

Chinese name

Polyurethane material

Foreign name

polyurethane

Full name

Polyurethane material

Category

Polymer Materials

Polyurethane materials daily applications

Furniture industry applications

1. paint, 2. paint, 3. adhesive, 4. sofa, 5. mattress, 6. seat armrest

Home appliance applications

1. Electrical insulation paint 2. Wire and cable sheath 3. Insulation layers for refrigerators, freezers, disinfection cabinets, water heaters, etc. 4. Waterproof potting glue for electronic components of washing machines

Construction industry applications

1. Sealant, 2. Adhesive, 3. Roof waterproof insulation layer, 4. Cold storage insulation, 5. Interior and exterior wall coatings, 6. Floor paint, 7. Synthetic wood, 8. Runway, 9. Water-proof plugging agent 10 Plastic floor

Transportation industry applications

1. Aircraft and automobile interior parts seat, armrest, headrest, door inner panel, instrument panel, steering wheel, bumper, shock pad, fender 2. Carpet lining, paint 3. Insulation parts, pipes .Gasket 5.Slip chain

Shoes and leather industry applications

1. Shoe inner and outsole 2. Adhesive 3. Leather finishing agent 4. Artificial leather and synthetic leather coating

Applications in the sports industry

Plastic sports grounds (including basketball, volleyball, badminton, tennis courts, running track laying), sportswear (dance clothes, swimwear, dance clothes); sports shoes, scooters

Industrial applications of polyurethane materials

PU flexible foam

Pads-such as seats, sofas, mattresses, etc. Polyurethane soft foam is a very ideal pad material, and the pad is also the application area with the largest amount of soft foam;

Sound-absorbing materialopen-cell polyurethane soft foam has good sound-absorbing and shock-absorbing functions and can be used as indoor sound insulation materials;

Fabric composites-shoulder pads, bra sponges, cotton pads; toys

Rigid PU

Freezing and refrigerating equipment-such as refrigerators, freezers, cold storage, refrigerated trucks, etc. Polyurethane rigid foam is the most ideal thermal insulation material for freezing and refrigerating equipment;

Industrial equipment insulation-such as storage tanks, pipes, etc .;

Construction materialsIn developed countries in Europe and the United States, rigid polyurethane foam used in construction accounts for about 70% of the total consumption of rigid foam, which is more than double the amount of rigid foam such as refrigerators and freezers; in China, the application of rigid foam in the construction industry has not yet As common as developed western countries, the potential for development is very large;

Transportation industry-such as car roof, interior parts (steering wheel, dashboard), etc .;

Imitation woodHigh-density (density 300 ~ 700kg / m3) polyurethane rigid foam or glass fiber reinforced rigid foam is a structural foam plastic, also known as imitation wood. It has high strength, good toughness, dense and tough skin, simple forming process, and production. Features such as high efficiency, strength can be higher than natural wood, density can be lower than natural wood, can be used as a variety of high-end products instead of wood.

Encapsulation materials-such as waterproof grouting materials, plugging materials, roof waterproofing materials

Flower industryPU flower pot, flower arrangement mud, etc.

PU Semi-rigid PU

Energy-absorbing foam-Energy-absorbing foam has excellent shock absorption, cushioning performance, good compression load resistance and deformation recovery performance. Its most typical application is for the preparation of automobile bumpers;

Integral Skin Foamused to prepare softening internal functional parts and interior trim parts such as automobile steering wheels, armrests, and headrests. Self-skinning foam products usually adopt Reaction Injection Moulding (RIM) processing technology;

Microcellular elastomers-The most typical application of polyurethane microcellular elastomers is in the footwear industry.

Polyurethane Elastomers (PU Elastomers)

Casting polyurethane elastomer (referred to as CPU)-it is the most widely used and most productive type of polyurethane elastomer;

Thermoplastic polyurethane elastomer (referred to as TPU)-thermoplastic polyurethane elastomer accounts for about 25% of the total polyurethane elastomer;

Compounded polyurethane elastomer (referred to as MPU)-accounts for about 10% of the total polyurethane elastomer.

Solid tires; printing and conveying rubber rollers; profiled rubber rollers; oil seals, gasket ball joints, bushing bearings; O-rings; support pads; soles, rear roots, toe caps; linings; gears; The hardness range of the body is different.

Application in mining, metallurgy and other industries-sieve plate, shaker, etc.

Applications in the machinery industry-rubber rollers, tapes, seals, etc .;

Applications in the automotive industry-tires, seals, etc .;

Application in light industry-polyurethane shoe sole, polyurethane synthetic leather, polyurethane fiber;

Applications in the construction industry-waterproof materials, paving materials, potting materials, etc.

Polyurethane Sole (Shoe Sole)

Polyurethane soles have many advantages: low density, soft texture, comfortable and lightweight wearing; good dimensional stability, long storage life; excellent abrasion resistance, flex resistance; excellent shock absorption, non-slip performance; better temperature resistance ; Good chemical resistance and so on. Polyurethane is mostly used in the manufacture of high-end leather shoes, sports shoes, travel shoes, etc.

Polyurethane slurry

Divided into two categories, wet method and dry method, it is a polymer solution system with a transparent or slightly cloudy appearance. The solid content is about (30-35)%, which means that (65-70)% is a solvent. To put it simply, 1 ton of slurry contains (650-700) kilograms of solvent. For the dry method, it contains so much toluene and methyl ethyl ketone. The amount of toluene is larger, because toluene has better solubility. For the wet method, For example, it contains 650-700 kg of pure DMF, so for the slurry, the changes in the price of toluene and DMF greatly affect the cost of the slurry. The reason is that the amount of use is significant.

Polyurethane slurry is used as a coating to prepare polyurethane synthetic leather and artificial leather. Polyurethane synthetic leather has the appearance of soft and natural luster, soft touch and strong dermis feel. It has excellent mechanical properties such as excellent adhesion to the substrate, wear resistance, flex resistance, aging resistance, and good mold resistance. It has the advantages of good cold resistance, breathability, washability, convenient processing, and low price. It is the most ideal substitute for natural leather. It is widely used in clothing, shoes, bags, furniture, sports and other industries. It can be replaced in all areas of dermis application, and can also be used in areas where dermis cannot be applied. The dermis market is easily affected by animals (cow, sheep, pigs, etc., mad cow disease).

Dry polyurethane slurryDuring the application process, the solvent in the slurry is evaporated by heating and evaporation. Most of the solvents are toluene and methyl ethyl ketone. The evaporated solvent cannot be recovered, which not only pollutes the environment, but also causes Necessary waste.

Wet-process polyurethane slurry-because the DMF is extracted with water during processing (because DMF has unlimited solubility with water), it is more environmentally friendly, and the synthetic leather produced has good moisture and air permeability and feel Soft, plump, light, and richer in the style and appearance of natural leather, it is growing at an alarming rate.

Polyurethane fiber (Spandex, spandex for short)

Excellent performance of spandex: outstanding high resilience, spandex's high resilience is incomparable with all elastic fibers at present, its elongation at break is greater than 400%, up to 800%, even when 300% tensile deformation , Rebound recovery rate is still more than 95%; excellent tensile strength, tear resistance; weather resistance, UV radiation resistance is strong; chemical resistance, washing resistance; good affinity with dyes.

Spandex has been widely used in textiles. It is a high value-added new textile material. There are four main forms of use: bare silk, core-spun yarn, covered yarn, and twisted yarn. Such as stockings, swimwear, dance clothes, lycra (cotton-covered spandex silk), clothing, etc. In traditional textiles, only adding less than 10% amount of spandex can greatly improve the grade of traditional fabrics, showing Soft, comfortable, beautiful and elegant style.

Polyurethane coatings (PU Coatings)

The main application areas of polyurethane coatings are: aircraft, ship, and vehicle painting; wood, plastic, rubber, and leather surface painting; building painting; anticorrosive painting, and so on.

Water-based polyurethane coatingswith water as the main medium, have low VOC content, low or no environmental pollution, and convenient construction. They are one of the main substitutes for solvent-based coatings. Has been widely used in many fields, such as: (1) wood paint and wood floor paint; (2) paper coating; (3) architectural coating; (4) leather coating; (5) fabric coating, etc. .

Polyurethane Adhesives (PU Adhesives)

Polyurethane adhesive contains highly polar and chemically active -NCO- (isocyanate), -NHCOO- (urethane group), and substrates containing active hydrogen, such as foam, plastic, wood, leather Porous materials such as fabrics, paper, ceramics, etc., as well as materials with smooth surfaces such as metal, glass, rubber, plastic, etc. have excellent chemical adhesion;

With excellent shear strength and impact resistance, it is suitable for various structural bonding fields, and has excellent flexibility characteristics;

Polyurethane adhesive has excellent rubber characteristics, can adapt to the adhesion of substrates with different thermal expansion coefficients. It forms a soft-hard transition layer between the substrates, which not only has strong adhesion, but also has excellent cushioning and reducing properties. Earthquake function

Low temperature and ultra low temperature properties of polyurethane adhesives surpass all other types of adhesives;

Water-based polyurethane adhesivesWater-based polyurethane adhesives have the characteristics of low VOC content, low or no environmental pollution, non-combustibility, etc., and are the key development direction of polyurethane adhesives.

Polyurethane Sealants (PU Sealants)

Sealant is a material used to fill voids (holes, joints, joints, etc.), and has both functions of bonding and sealing. Polyurethane sealant, silicone sealant and polysulfide sealant constitute the three major varieties of high-end sealants.

Polyurethane sealants are widely used in civil construction, transportation and other industries:

Application in construction-filling and sealing of doors and windows, glass, etc .;

Civil engineering applications-caulking seals on highways, bridges, runways, etc .;

Application in automobiles-assembly seal of windows (mainly windshield).

Polyurethane sealant has many excellent characteristics, including: (1) wide adjustable range of performance and strong adaptability (2) good abrasion resistance; (3) high mechanical strength; (4) good bonding performance; (5) good elasticity , Has excellent resilience, can be used for dynamic seams; (6) good low temperature flexibility; (7) good weather resistance, service life up to 15-20 years; (8) good oil resistance; (9) biological aging resistance; (10) The price is moderate.