Polypropylene threads: properties and main characteristics

2024 Author: Priscilla Miln | [email protected]. Last modified: 2023-12-16 00:21

The development of modern technologies has led to the creation of such progressive materials, without which it is already difficult to imagine our life. These include polypropylene threads, which are especially widely used in the fishing and textile industries.

Description

Such threads are twisted polymer fibers with high strength and durability. Their production process is quite complicated. Polypropylene is melted, adding the necessary components that improve the properties of the finished product, and a film is formed from it, which is cut into strips. The resulting material is wound on special bobbins or spools in a cross way, so that the thread comes off much easier without tangling or clinging.

Properties of polypropylene threads

The high demand for this material is due to the large number of its advantages compared to those of conventional threads. Polypropylene threads are characterized by increased strength, elasticity and minimal bulk density. They are resistant to abrasion, repeated bending, are not subjected todecay processes, have high resistance to detergents, hot water, and also have antistatic properties. An important fact is that polymer threads are an environmentally friendly material, so they do not require any special precautions when working with them. And products from them can safely come into contact with food.

Due to chemical inertness, these threads are not able to break down over time. They do not fade, but after production it is no longer possible to paint them. The pigment is added to the polypropylene before the film is made.

Polypropylene threads must necessarily comply with GOST. The average weight of produced bobbins is 5 kilograms, and the winding density in them ranges from 550 to 3500 tex. The strength of the threads (the ability to resist breaking under load) is measured in KGS (kilogram force) and is 1.4–21 KGS.

Fibrillated thread

This is a thread that is made by the method of longitudinal splitting (fibrillation). After the formed polymer films are cut into strips (their width is not more than 100 mm), they are split with a special device in the form of a needle roller. To do this, use it to make longitudinal scratches on the surface of the film.

After that, the strips are pulled in such a way that their length becomes 4–10 times longer, and heat treatment is carried out on pull rollers in a special chamber, where the film melts from high temperature and, as a result, is stretched, This is howflat polypropylene thread (or fibrillated).

Multifilament thread

A feature of the production of these threads is the use of special additives, as a result of which the resulting material becomes very resistant to ultraviolet rays. Multifilament threads are used for the manufacture of products that must be especially resistant to all weather conditions, chemicals, etc.

Application

The range of use of this material is extremely wide. Polypropylene threads, due to their versatility, have found application in a wide variety of industries. In agriculture, they are used for tying sheaves and tying plants. In fishing, they are used to make nets; in light industry, the manufacture of carpets and many household items is indispensable without this material. Threads are in great demand in the medical industry and in cosmetology. Resistant to fading and detergents, polypropylene thread is used for washcloths, rugs and bright handbags, which are knitted by the skillful hands of modern craftswomen.