Visa källa för PP


== Materialegenskaper: == 
: density [kg / m3]: 946 kg/m³
: hardness (Rockwell "R" Scale): 90 
: resistivity [1015 Ohm.cm]: Min Value 16.0/ max value 18.0

Other properties 
: Chemical Resistance
: Elasticity and Toughness
: Fatigue Resistance
: Insulation
: Transmissivity


== Användning ==

As  the second most commonly used plastic in the world polypropylene has many different uses, anything from from making simple folders to parts in the automotive industry, polypropylene is very common. 

The reason why polypropylene is so widely used is because of its ability to adapt to “various fabrication techniques”. polypropylene is used for its resistance to leaching, its resilience against most forms of physical damage, its aid to the environment, and its ability to be joined by heat fusion.
 
A common form of polypropylene is biaxially oriented polypropylene. In this form the  polypropylene becomes very clear, and in the form of sheets they can be used for a variety of material like the common clear bag. Polypropylene is also used as a substitute to polyvinyl chloride, for insulation against electric cables. But with no toxic halogens. 

== Framställning ==

There are mainly two ways to process polypropylene, ethier with the use of  extrusion or molding:
Extrusion is a method where melt-blown and spun-bond fibers are produced to form rolls. The rolls are later transformed into a variety of commonly used products. These products are usually physically softer in nature examples include napkins, filters or  or face masks. 
The other  commonly used procedure, molding or injection molding, is the method which produces products by injecting molten plastic into a mould. The products salvaged from this process are physically harder in nature examples include  cups, cutlery or house wares.


== Historia ==

Polypropylene opaque or PP is defined as a thermoplastic and it’s made from the polymerization of propylene monomers. polypropylene was first combined in the year 1951 by the pair Paul Hogan and Robert Banks but it was in fact the german scientist Professor Giulio Natta who popularised the plastic after he synthesized the first polypropylene resin in Spain the year 1954. By 1957 polypropylene had began a commercial production which spread across Europe.
Polypropylene’s extreme versatility when it comes to its uses and reasonable price means that it’s in high demand. In the year 2017 alone over 70 million tones of it was consumed worldwide and that number is expected to increase to 100 million by the year 2025, to meet global demand.

== Pris ==

You can buy polypropylene att mouduler.se if you entier in the code “0710160” it cost 1,95€  for 210 mm x 297 mm compared to other plastics like Polystyrene,  Which costs 1,45€, polypropylene is relatively expensive but for all of its uses and benefits it’s worth it.

== Länkar ==

https://www.creativemechanisms.com/blog/all-about-polypropylene-pp-plastic
https://www.modulor.de/en/polypropylene-opaque-coloured-matte.html
https://www.astm.org/Standards/F2389.htm
https://www.woodmac.com/news/editorial/polypropylene-global-supply-demand-analytics-service/
http://www.profol.de/en/polypropylene-pp/polypropylene.html
https://www.coursehero.com/file/p30ovnk/Uses-A-common-application-for-polypropylene-is-as-Biaxially-Oriented/