Suitcases are usually resistant to the passage of time and use. We will distinguish the 4 most important materials with which they usually make this type of suitcases. The choice of the perfect suitcase starts with the choice of material; Polypropylene, polycarbonate, ABS and ABS / PC
Polypropylene, commonly called PP, is a very rigid and resistant material, gives the best of itself with low temperatures of -10 ° C and maintains its own characteristics of strength, is resistant to shocks and to all environmental conditions. Thanks to the characteristics of non-polarity from the chemical point of view, it is identified (as) very resistant: up to 120 ° C maintains its characteristics of solidity even in the presence of aqueous solutions containing strong salts, acids and alkalis. Polypropylene (PP) is the thermoplastic polymer, partially crystalline, which is obtained from the polymerization of propylene (or propene). It belongs to the group of polyolefins. It can be compared in some way with high density polyethylene and is similar in manufacturing. Polypropylene has a higher hardness and thermal resistance than high density polyethylene but lower impact strength.
Then there is the polypropylene, which guarantees excellent resistance (which is why it is considered almost indestructible), but which is less lightweight. Anyone who needs a suitcase that can withstand even the worst impacts, could resort to a polypropylene product.
Polycarbonate is best known for its impact resistance, but it has additional properties such as: optical transparency, excellent creep resistance, wide temperature range, high dimensional stability, good electrical characteristics and self-extinguishing behavior. The good heat resistance of polycarbonate offers a high melting temperature, this versatile thermoplastic maintains its properties over a wide temperature range, from -4 ° C to 140 ° C.
Polycarbonates are a particular type of polyesters, long chain polymers, formed by functional groups connected by carbonate groups (-O- (C = O) -O-). Because the benzene groups are directly in the main chain, the molecule is very rigid, causing the polycarbonate to have an amorphous structure, a low contraction in the molding (both transverse and parallel to the flow) and be transparent. The polycarbonate guarantees an incredible lightness and, if it is 100% pure, a great elasticity and impact resistance. This type of material is very expensive, so it is often mixed with ABS. Therefore it is necessary to distinguish if it is 100% polycarbonate (this should be indicated on the label), or sometimes under the description of polycarbonate suitcases are presented that are the result of mixing it with inferior materials, which may cause The material is not so resistant. If it is mixed with ABS or others (as in the case of almost all products on the market of this type), it remains light but loses a lot of resistance.
The PC / ABS (polycarbonate / acrylonitrile butadiene styrene) is a mechanical mixture between PC and ABS. This material offers most of the desirable properties of the two materials that make it up (PC and ABS). So you get a unique combination that adds the high processability of ABS with the excellent mechanical properties and resistance to impacts and heat of the PC. The ratio between polycarbonate and acrylonitrile butadiene styrene mainly affects the heat resistance of the final product.
ABS plastic is a copolymer of acrylonitrile, butadiene and styrene, and generally has medium strength and performance at an average cost. ABS is a common thermoplastic resin and can often meet property requirements at a reasonable price, and may include standard resins (PVC, polyethylene, polystyrene, etc.) and engineering resins (acrylic, nylon, acetal, etc.). ABS is considered the best in the styrenic family. It is tough, hard and rigid and has good chemical resistance and dimensional stability.
PC / ABS (polycarbonate / acrylonitrile butadiene styrene) is a mechanical mixture also called alloy, alloy or blend, between PC and ABS. This material offers most of the desirable properties of the two materials of which it is composed (PC and ABS). by which a unique combination is obtained that adds the high processability of ABS with the excellent mechanical properties and resistance to impacts and heat of the PC. The ratio between polycarbonate and acrylonitrile butadiene styrene mainly affects the heat resistance of the final product.