Polypropylene (PP) is a thermoplastic “addition polymer” made from the combination of propylene monomers
Polypropylene (PP) is a thermoplastic “addition polymer” made from the combination of propylene monomers. It is used in a variety of applications to include packaging for consumer products, plastic parts for various industries including the automotive industry, special devices like living hinges, and textiles. Polypropylene was first polymerized in 1951 by a pair of Phillips petroleum scientists named Paul Hogan and Robert Banks and later by Italian and German scientists Natta and Rehn. It became prominent extremely fast, as commercial production began barely three years after Italian chemist, Professor Giulio Natta, first polymerized it. Natta perfected and synthesized the first polypropylene resin in Spain in 1954, and the ability of polypropylene to crystallize created a lot of excitement. By 1957, its popularity had exploded and widespread commercial production began across Europe. Today it is one of the most commonly produced plastics in the world.
X-ray diffraction profile analysis was applied to the study of polymers by Buchanan and Miller for the first time in 1966 [l]. They used the double-peak Fourier analysis described by Warren and Averbach . In the case of polymers, two peaks of different orders of diffraction are not so easy to record, Single-peak analysis has been developed by many people [3-7] but very few results have been reported for the deformed structure of polymers. In this work the fine structure of a series of deformed i-polypropylene (i-pp) films was studied by a single-peak profile analysis based on the data obtained from a special arrangement of samples in the diffractometer. The crystallinity and degree of orientation during deformation were also studied.
Polypropylene Raffia Straw is a synthetic fiber obtained from extrusion of polyethylene and polypropylene.Here you will find Polypropylene Raffia Straw with different thicknesses and in different weights.
Polypropylene or PP is a low cost thermoplastic of high clarity, high gloss and good tensile strength. It has a higher melting point than PE, which makes it suitable for applications that require sterilization at high temperatures. It also has less haze and higher gloss.Generally, the heat-sealing properties of PP are not as good as those of LDPE. LDPE also has better tear strength and low-temperature impact resistance. PP can be metalized which results in improved gas barrier properties for demanding applications where long product shelf life is important. PP films are well suited for a broad range of industrial, consumer, and automotive applications.PP is fully recyclable and can be easily reprocessed into many other products for many different applications. However, unlike paper and other cellulose products, PP is not biodegradable. On the upside, PP waste does not produce toxic or harmful by-products.
The two most important types are cast unoriented polypropylene (CPP) and biaxially oriented polypropylene (BOPP). Both types have the high gloss, exceptional optics, good or excellent heat-sealing performance, better heat resistance than PE, and good moisture barrier properties.
PP film is used for many common packaging applications such as cigarette, candy, snack and food wraps. It also can be used for shrink wrap, tape liners, diapers and sterile wrap used in medical applications. Because PP has only average gas barrier properties, it often is coated with other polymers such as PVDC or acrylic which greatly improve the gas barrier properties. Due to the low odor, high chemical resistance, and inertness, many PP grades are suitable for packaging applications under FDA regulations.