It is a useful plastic for injection molding. In addition to injection molding, polypropylene fibres has many uses in fiber applications. This makes it more versatile than other plastics. Polypropylene fibres gained popularity after its first production in the 50s. According to some reports, there is an estimated global demand of approximately 45 million tons per year. This demand is expected to rise to approximately a 62million metric tons in 2020, according to some estimates. The largest end-users for polypropylene fibres are the packaging and electrical industries. They consume about 30% each. Each of the two major end-users is 10% for household appliances and automotive, and 5% for construction materials.
It is a very popular material for injection molding. Polypropylene fibres’s versatility and unique properties are just some of its many advantages. Polypropylene fibres have a low melt viscosity, making them easy to mold. This property dramatically increases the speed with which you can fill up your molds. To maintain a clean surface and prevent flow fronts and voids such as weld lines or voids from forming, the rate shouldn’t be too high.
The melting temperature can range between 200oC (392oF), 250oC (482oF), or higher depending on which grade of polypropylene fibers it is and the types of additives it contains. Shrinkage in Polypropylene fibres is 1%. But, it can vary depending upon a variety of factors like holding pressures, holding time, melt temperatures, mold wall thicknesses, mold temperature, and the amount and type of additives.
Polypropylene fibres, A CNC Machinable Plastic
Polypropylene fibres, a non-machineable material, have earned a reputation. This is due to its low annealing temperature which causes it heat-sensitive and can cause it to deform. Because it is a soft material, cutting it accurately with precision requires very high skills. Creative Mechanisms has been successful. Our teams can use CNC machines to cut the plastic propylene accurately and quickly.
Additionally, living hinges are possible with polypropylene fibres as thin as.010 inches. Living hinges are not an easy task.
Polypropylene fibres Pros
Like any other polymer, there are pros and cons to polypropylene fibres that make it more appropriate for certain applications than others. Polypropylene fibres are a great option:
- It’s a very affordable material
- Due to its semicrystalline nature, it exhibits high flexural force.
- It is highly resistant to chemicals from a wide range of bases and acid bases.
- It has good fatigue resistance
- It resists electricity well, and this is good electrical insulation.
Polypropylene fibers do not react with acid, which makes them the perfect material for containers used to store acidic liquids.
Polypropylene fibres pipes will not freeze well due to their resistance to freezing.
Polypropylene fibres can turn into liquid when it reaches their melting point. From this state, it can easily be molded to any shape desired, which can be repeated several times without any damage to the plastic. Because it reacts to heat, polypropylene fibres have been used in injection molds.
Polypropylene fibres have low conductivity and are therefore classified as insulation. This makes polypropylene fibers a very good material for electronic components like cables and other audio equipment.
Polypropylene fibres, which absorb less than 0.01% water when soaked in them, are highly impermeable. This makes polypropylene fibres ideal for items or products that are immersed in liquids.
Polypropylene fibres’ malleability means it can easily be transformed into a living pivot; a piece that can bend even after repeated bending without cracking.
Polypropylene fibres have high tensile strengths, making them useful for heavy loads. It can withstand 4800psi.
Polypropylene fibres’s density is also lower than that of other plastics. Therefore, manufacturers can benefit from its low weight and cost savings.