With the popularity of household automobiles and the maturation of automobile consumption, consumers' requirements for automobile products are also getting higher and higher, and the requirements for seats have gradually changed from function and safety to comfort, health and sense of grade.Car seats are the most important and most important comfort experience for users during driving. Sometimes, even if the space in the car is spacious enough, the seat comfort is not very good, and the riding experience will be greatly reduced.People often give such evaluations, "This car is very comfortable to sit on", "This car is very hard to sit on", "the backrest is uncomfortable to lean on", etc. These are the so-called "seat comfort", so what are the factors that affect seat comfort?
The factors that affect the comfort of the seat mainly include three aspects: fabric system, foam material and skeleton structure.Among them, the comfort of sitting up mainly depends on the foam material and the skeleton structure, these two parts determine the support effect of the seat to the occupant.Polyurethane (PU) foam has been used as a backing material for car seats for decades. Polyurethane has gradually become an indispensable material, and its advantages are unmatched by other materials.So what is polyurethane?
Polyurethane (Polyurethane, PU), full name polyurethane, is a general term for macromolecular compounds containing carbamate groups (-NHCOO-) on the main chain. It is formed by the polymerization of diisocyanates with dihydroxy or polyhydroxy compounds. Polyurethane macromolecules also contain ethers, esters, urea, diureas, urea formates and other groups.With the advancement of chemical research, product manufacturing, process technology, and the continuous expansion of application fields, polyurethane materials have gradually become the sixth largest synthetic materials in the world (the world's six largest synthetic materials are PE, PP, PVC, PS, PET, PU). It is the only synthetic polymer material of various polymer materials that has significant application value in the fields of plastics, rubber, foams, fibers, coatings, adhesives, and functional polymer materials. Polymer materials.
Since the groups contained in polyurethane macromolecules are all strongly polar groups, and the macromolecules also contain polyether or polyester flexible segments, polyurethane has the following characteristics：
(1) Good heat resistance: it can be used for a long time at high temperatures without significant performance changes.
(2) Excellent mechanical properties: Polyurethane has high strength and hardness, as well as certain elasticity and toughness, so it is widely used in many fields.
(3) Good corrosion resistance: it can be used for a long time in highly corrosive media such as acid, alkali, salt, etc.
(4) Good weather resistance: it can be used for a long time in natural environments such as ultraviolet light, oxygen, and water.
(5) Good insulation properties: it can be used in the manufacture of electrical appliances, cables and other insulation materials.
(6) Good wear resistance: it can be used in harsh environments such as high load and high speed friction.