Baling twines, or baler twine, refer to the small, thin diameter sisal or nylon twines used in binding, twisting and looping large amounts of flexible raw material, such as fibreglass PVC and rubber. Baler twines are primarily used for tying, twisting and looping in soft rope to form complex shapes, such as girdles, bows and bags. The small size and obvious all-around strength make baler twine a popular industrial strength fibreglass material for rope lacing and cable ties. However, they also have equally strong practical applications that include domestic packaging, garment and industrial production settings.
Baling twines can be classified according to the wire diameter and tensile strength of the core wire. They are generally manufactured using polypropylene (PP) or polyethylene (PE), which have lower tensile strength than most commercial polyester fibres. The smaller diameter of the core wire, which are between 0.1 inches to 0.5 inches, make them more easily twisted and wrapped. Moreover, the cross-links developed with bale twines; usually, single strands of polypropylene, provide a strong, tightly woven core that can withstand a considerable amount of force. These traits make the bale twines ideal for applications requiring tight lacing and reinforcing high tension production.
For example, when the machine is loaded with a bag full of raw materials, such as wood or metal, the baler twine will need to take on significantly more twisting and pulling than other materials. This additional load will significantly impact the wire diameter and tensile strength of the core wire. A properly designed baler twine will also be better able to handle the higher temperature and higher humidity part of industrial baking and fabrication processes.
In addition to its ability to withstand high stress and adverse environmental conditions, the most effective baler twine wire is made from high-quality sisal fibres. As the name suggests, sisal fibres are woven to create rope, the raw material woven into many different products, including balers. Because the core wire is much thinner than the finished product, using sisal fibres makes it possible to utilize considerable amounts of the raw material without wasting or alloying it. It results in less weight and lowers continuous wire diameter, further contributing to cost-efficiency and efficiency in the overall construction.
As an aside, many companies prefer to use polypropylene (PP) instead of polyester (CP) in their baler twines for several reasons. First, CP is not renewable, and polypropylene is, so it is an extremely popular choice for wire. Second, it has an exceptionally high tensile strength rating, which means that it can handle much heavier loads without weakening, cracking, or breaking down over time. Lastly, because polypropylene is soft, it is often used in applications where additional strength is necessary, such as connecting individual strands of raw materials.