1, polyurethane foam

The largest production of foam products, relative density of most of the 0.03 to 0.06 between the hard foam thermal conductivity is only about 40% of the cork or polystyrene foam, there is enough strength, oil resistance and adhesive capacity, is an excellent shockproof, heat insulation, sound insulation materials. Polyurethane flexible foam with good elasticity, or ideal seat cushion, mattress material.

2, polyurethane rubber

Polyurethane rubber

By its processing mode is divided into mixing type, thermoplastic and casting type three categories. Mixing type raw rubber is saturated or a small number of double bond end hydroxyl polyurethane, can be used in the processing of ordinary rubber molding method, the output is small.

Thermoplastic rubber has two kinds of full thermoplastic and semi-thermoplastic, the former is a linear structure, the latter has a small amount of crosslinking, they can be molded with thermoplastic processing methods and equipment. The casting type rubber mostly adopts liquid prepolymer and chain extender mixed rapidly after casting molding or spraying, which is more adaptable.

3, polyurethane coatings

divided into two-component and single-component two: two-component polyurethane coatings for the polyether-type, multi-isocyanate and polyether two-component solution is directly mixed with the use of single-component polyurethane coatings for the unsaturated polyester-type, including the oil-modified type, wet-curing type and closed type of three kinds. Polyurethane coatings are constructed by spraying, electrodeposition, impregnation and other methods.

The coating is wear-resistant, resistant to gasoline, grease, water and inorganic acid vapors, has high insulation and adhesion, and has a bright long-term color.

4, polyurethane adhesive

Generally composed of polyisocyanate and hydroxy polyester compounds two-component system. Can contain curing initiator, powder filler (titanium oxide, zinc oxide, cement), solvents (acetone, ethyl acetate, chlorinated hydrocarbons).

Extended Information

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 handfeel and strong sense of leather, excellent mechanical properties such as excellent adhesion with the substrate, anti-abrasion, anti-flexing, anti-aging, good resistance to mold and mildew, and so on.

At the same time also has the advantages of good cold resistance, breathable, washable, easy to process, inexpensive and so on, is the most ideal substitute for natural leather, widely used in clothing, shoes, bags, furniture, sports and other industries.

Wherever leather is applied in the field, it can be replaced, and can also be applied to leather can not be applied in the field of leather, leather quotations are very susceptible to animal (cattle, sheep, pigs, etc. quotations, mad cow disease).

Dry polyurethane slurry - in the process of application, by heating evaporation of the slurry in the solvent evaporated, the solvent is mostly used toluene, butanone, evaporated solvent can not be recycled, not only pollution of the environment, but also caused unnecessary waste.

Wet polyurethane slurry - as the processing is used to extract DMF with water (the reason is that DMF and water have infinite solubility), more environmentally friendly, and the production of synthetic leather has good moisture permeability, breathability, soft feel, plump, light, and more rich in the style and appearance of natural leather, and therefore The development speed is extremely amazing.

Baidu Encyclopedia-Polyurethane