Polypropylene is a versatile polymer used extensively in filtration applications, among others. The pore size of polypropylene filters can range widely, from as small as 0.1 microns to over 100 microns, depending on the specific application. In industrial processes, smaller pore sizes are crucial for achieving high levels of purity, especially in pharmaceutical or food and beverage manufacturing, where even minuscule contaminants must be removed. For air and gas filtration, larger pores may be sufficient and can provide the added benefit of lower pressure drops. The selection of pore size in polypropylene filters is thus a critical decision that balances the need for efficiency, pressure drop, and filtration capacity. Techniques like melt-blown manufacturing allow for precise control over pore size, leading to filters tailored for specific applications.

Titanium is very malleable. By applying pressure. it can be reshaped or molded without cracking or breaking.

Fixing polypropylene plastic can be challenging due to its low surface energy, which makes it difficult for adhesives to bond with. However, it can be done successfully using the right techniques. First, cleaning the surface thoroughly with isopropyl alcohol to remove any grease or dirt is crucial. Next, using a plastic welding method with a specially designed heat gun and rod made of polypropylene is highly effective for repairing cracks or breaks. This method essentially melts the polypropylene, allowing it to fuse back together as it cools. For smaller repairs, adhesive solutions designed specifically for polypropylene can be used, though they might not be as durable as welding. Always wear appropriate safety gear when working with heat tools or chemicals.