- Twine materialPolypropylene
Twine jute diameter 1,5mm, 2 mm, 2,5mm. In agriculture the twine is applied during assembly of harvest by press sorters to binding of piles of straw and hay. In St
The twine is one-filar or multistrand twisted product which are produced from paper, bast fibers (hempen, linen, kenafny, jute), chemical fibers or threads (polypropylene, kapron, viscose), and also their combinations.
Depending on syrya which is used for production of twine distinguish such twine:
- the linen twine - is made from flax fibers;
- jute twine - from gunny fibers;
- lnopenkovy twine - from mix of bast fibers;
- the paper twine - is made by twisting of one, two or three tapes of kraft paper;
- viscose twine - from viscose threads;
- polypropylene twine - from polypropylene threads;
- kapron twine - from synthetic polyamide fiber.
On structure the twine happens one-filar and multistrand. The multistrand twine is produced twisting of several threads or pryazh in the direction opposite to arrangement of twist of initial thread or yarn. At production of twine from polypropylene threads it is allowed not to twist initial thread.
Twine from natural fibers (linen, lnopenkovy, jute), have very beautiful appearance, possess resistance to influence of external climatic factors. As for production of linen, jute, lnopenkovy twine fibers of plants, these twine ecologically safe and harmless to human body are used. Also twine from natural fibers (linen, lnopenkovy, jute) possess such properties:
- natural twine (linen, jute, lnopenkovy) are highly hygroscopic, well absorb drop moisture and at the same time quickly give it, dry;
- on twine charges of static electricity are not formed of natural fibers (linen, lnopenkovy, jute);
- fibers to jute, flax of which hemp make twine possess bactericidal properties;
- twine resistant to influence thermal and sunlight;
- twine from gunny fiber the strongest as it contains large number of lignin (12,7%) which is responsible for rigidity of fiber. (The lignin is natural polymer which is in cages and intercellular space of plants, he is responsible for durability of stalks and trunks of plants, and also reduces water permeability of cell walls.)
Spars from artificial filaments on durability, firmness and some other characteristics exceed twine which are made of natural fibers. Also twine from artificial filaments possess such properties:
- do not sink in water (polypropylene twine);
- resistant to reusable bending (polypropylene, viscose, kapron twine);
- not rastvaryayutsa in organic substances (polypropylene, viscose, kapron twine);
- resistant to influence of the boiling water and meadows;
- that does not avoid moisture damp (polypropylene, viscose, kapron twine);
- wear resistance to attrition (polypropylene, viscose, kapron twine);
- it is very convenient at manual binding and lacing.
Twine are applied in the different industries of national economy for:
- obvyazyvaniye, sewings together, packagings of different types of products and for the special purposes;
- packagings and obvyazyvaniye of parcels post, boxes;
- for smoking of sausages, fish, cheeses;
- design and decorative purposes;
- garter of hothouse cultures;
- for senopresovochny cars;
- economic needs;
- for lacing of documents and folders;
In agriculture the twine is applied during assembly of harvest by press sorters to binding of piles of straw and hay. In the countries of North America generally tie with it hay. And here in Western Europe it is used most often for straw. Earlier such twine was made of Davao hemp. But last century in the market cheaper raw materials sisal have appeared. Generally these raw materials for production of twine were delivered from East Africa, Brazil and Angola. But over time these countries have arranged the production. With emergence in the market of polypropylene twine which successfully competes with twine from sizalya demand for it constantly grows. Especially it is popular in the USA and Canada where store in the West of pile of hay in open form. But in east areas of these countries still prefer sisal.
It should be noted that in recent years demand for agricultural harvest binder slightly decreases. This results from the fact that there are changes in area of storage of forages and there are new methods of harvesting some of which do not assume use of twine at all. In Europe, for example, silage methods of preservation of forages are successfully entered. But the analysis of the market shows that demand for twine from sizalya while on polypropylene even increases generally decreases. There is not enough still the saturated market in countries of Eastern Europe. But this problem is solved due to emergence today in these countries of the productions on production of polypropylene twine which prices can successfully compete in this market.
It is obvious that the world market of the twine used in agriculture after all has limited opportunities for further expansion. But, nevertheless, these opportunities are available, both for twine from propylene, and from sizalya. Most is suitable for binding of round piles of hay polypropylene, owing to the certain technical advantages. Though many farmers also prefer to overpay a little for sisal, but after all the price will have in the future crucial importance. And those who have begun to use polypropylene twine will hardly return to sizalyu. Polypropylene is always cheaper sizalya. Depending on conditions of the market its price can be 5-50% lower. And such level of prices for propylene is restraining factor for production sizalya.