Three strands of ropes are widely used in the market, so the demand is also very large. The following are the evaluation criteria for three-strand ropes and three-strand ropes.

         Generally made of gray-yellow twine, the length is 6 meters and the weight is 0.15 kilograms. The pulling resistance is larger than the tied rope, the defect is perishable, and the cost is high.

Variety of nylon multifilament (line), polypropylene filament (line), polypropylene, polyester, polypropylene / polyester mixed products. Its products have a wide range of applications, such as high strength, low elongation, wear resistance, corrosion resistance, softness, smoothness, and easy operation. At the same time, anti-static and other special ropes can be made.

Judging whether or not the three-strand rope and the three-strand twisted rope meet the standard is divided into three indicators:

1, 捻 degree

When the yarn or the nylon yarn is twisted, the two sections produce the same number of revolutions, which is expressed by the number of turns in the unit length, which is called twist degree.

2, the return angle

The twist angle is used to measure the degree of twisting of different thickness gauze. The busbar that has been twisted into a cylindrical helix is developed with a pitch of L and the helix in the pitch is a straight-angled triangle. The angle between the tangent of any point on the spiral line and the axis is β, which is called the detour angle.

3. Wafers

When twisting, the arc length that a point on the cross-section of a yarn turns within a unit length is called a roll width.