The main factor in determining the strength and stretch of polypropylene staple fiber yarns is the fiber properties and yarn structures. The mixed spinning is also affected by the nature difference between blended fibers and blend ratio. Let Xiaobian explain to everyone.

1, fiber properties

The length of the fibers, line density:

When the fiber length is long, the fibers are finer, the frictional resistance between the fibers in the yarn is large, and it is not easy to slip, so the yarn is high.

When the fiber length is better, the fiber is fine and uniform, the yarn strip is uniform, and the weak ring is less and is not significant, which is conducive to the improvement of the yarn.

The strength of the fiber:

When the fiber is strong, the stretch is high, the stretch is strong, the stretch is also large; the fiber strong, the elongation is small, and the yarn is high.

Fiber surface friction performance:

When the surface friction coefficient of the fiber is increased, the sliding resistance between the fibers is large, the sliding length Lc is reduced, and the ratio of the sliding fiber is reduced, and the yarn intensity is increased. Improve the number of fibers can increase the sliding resistance between the fibers.

2, yarn structure

(1) The effect of polypropylene staple fiber gauze on its strong and extension is mainly reflected in the twist.

When the twist increases, the frictional resistance between the wood fibers is increased, which is not easy to slip, which facilitates increasing the strength of the polypropylene short fiber, but when the twist is increased, the tilt of the polypropylene short fiber is getting larger and larger, the polypropylene short fiber strength is The effective force of the yarn axial is lowered, and the fiber breakage in the yarn is exacerbated. At the same time, the fiber tilt is increasing the diameter of the yarn diameter to the relative intensity of the yarn.

(2) Influence

The single yarn and cooperates to make the strand lines are uniform, and there is a contact between the single yarn, the single yarn outer layer fiber is increased, and the line power is greater than the sum of the strength of each single yarn.

(3) Arrangement form of polypropylene staple fibers in the short fiber yarn

The intensity of the finger yarn is lower than the ring yarn: the molten yarn, the irregular arrangement of the fold, curl, circle, etc. .

Hai'an County Qinfeng Chemical Fiber Co., Ltd. specializes in production and sales:polypropylene staple fiber, Polyester Staple Fiber, functional polypropylene short fiber, functional polyester staple fiber, hydrophilic polyester staple fiber,  polypropylene, PP staple fiber, polyester staple fiber.