Twine hay twine: characteristics, application

Modern agriculture is difficult to imagine without a huge number of all kinds of machines and aggregates. They greatly facilitate the work and at times increase labor productivity. Entire industries are engaged in the production of additional supplies for machinery, such as hay-yarn twine. Without it, the preparation of roughage (hay, straw, haylage) is simply impossible.

Twine

The word spaghetto is translated from Italian as a "thin rope". Shortened spago - "twine" or "twine".

It is a thin thread. Can be multi-threaded or single-stranded. Multi-threaded - spun or twisted of several fibers. And the twisting occurs in the opposite direction with respect to the twist of the original fiber. This helps to achieve the greatest strength of the final product. Twine polypropylene hay knitting can be made from untwisted fibers.

Kinds

In different spheres of human activity can not do without rope. Somewhere an artificial thread approaches, somewhere only natural is needed. Depending on the material used to produce the rope, it is divided into several types. Before the appearance of synthetic materials (polypropylene) twine, rope were made exclusively of natural materials. They may be:

• cotton;

• Linen;

• jute;

• hemp;

• lnopenkovye;

• Sisal;

• paper;

• polypropylene;

• Polyamide.

Artificial fibers are preferable for both price and durability. But there are some areas where it's impossible to do without twine from natural material - the food industry. All smoked products are fixed only with jute natural twine. This applies not only to meat, but also fish products.

physical characteristics

Twine hay twine should be strong enough to withstand the burden imposed on it. There are several indicators on which the physical properties of the material are determined:

• Linear density ("tex" in Latin from "weave"). This indicator serves to measure the weight. If the twine 2200 TEX, it means that 1 kilometer of the thread weighs 2200 grams (2.2 kg). The unit of measurement is g / km.

• Break strength. Measured in kilograms and determines the ability of the material to withstand tensile stress. It inevitably occurs when tying the bale. For example, if TEX is 2500g / km, then the strength of the gap is almost 100 kg.

• The strength of the tear in the knot. The thread itself is much stronger than the bundled knot. Its ability to withstand the load falls more than twice. Twine TEX 2500 g / km: force to break exactly in the knot - about 50 kg.

• Resistance to ultraviolet radiation (UV). External natural factors can affect the material. Twine hay twine enters into chemical and physical reactions when interacting with oxygen and ultraviolet. This happens during long-term storage of bales.

The main factors affecting the safety of the thread:

• heat resistance;

• density;

• Resistance to cracking (drying);

• Presence of stabilizers (from UV exposure);

• type of fiber (source).

Modern chemical industry allows you to select the optimal formulas for appropriate additives to protect the fiber from destruction.

Application area

In our daily life there are enough areas where it's impossible to do without such a simple thing as twine (rope). All hay harvesting machinery in agriculture needs bobbins with high-quality thread. Without it, modern cattle breeding is impossible. A huge amount of roughage is harvested and compactly stored for the winter period thanks to the baling rope.

In agriculture, it is used for vineyards and greenhouses. As a packaging material twine has been used for more than one century. Modern designers can easily find use in the interior. Even our smaller brothers use a hemp rope. Modern huge ships can not do without hemp ropes. Polypropylene twine is indispensable in the manufacture of fishing nets.

Polypropylene product

The most popular is polypropylene twine hay. The price for a bobbin can vary within the limits of 10-50 US dollars. It depends on the brand, weight and quality of the products offered. Its main advantages are:

• Does not swell from moisture;

• Does not rot;

• resistant to temperature changes;

• withstands repeated bending;

• does not conduct electricity;

• cheaper than their counterparts from natural materials;

• The softness of the material can be used in mechanisms with a high level of automation;

• strong, you can tighten the bales very tight.

Manufacturing

Artificial threads are cheaper than natural ones. They can be subjected to various treatments, add the necessary ingredients to the composition, seeking changes in these or other properties.

Twine polypropylene hay knitting is made of special granules of polypropylene. The process itself can be described as follows: the granules fall into a special hopper for softening. It is forced out of it through the molding head. The resulting film is cooled, stretched and cut into thin strips. In a special chamber of longitudinal orientation, they acquire their chemical and physical properties and are ready for twisting. Then they are wound on bobbins.

The quality of the products depends on a number of factors:

• the composition of raw materials;

• temperature conditions; If the technology is not observed, the macromolecules are destroyed and a melt that is uneven in consistency is obtained;

• constancy of the optimum pressure, instability leads to poor material extensibility.

Manufacturers achieve a reduction in linear density, along with an increase in fiber strength. Recent developments are characterized by high strength and softness. This is of great importance when tying knots, they are reliable and durable.

The most famous manufacturers to date are China, the United States, Turkey. From the countries of Western Europe - Finland (Piippo), Austria (TEWE), Portugal (Cordex), Hungary (Tama Twine), Czech Republic (JUTA). In the post-Soviet space, twine knitting twine is produced by the companies of Ukraine "Polimerspagat", in Belarus - "Khimvolokno-Belaruskolokno", in Russia - "Kamenskvolokno".