Preparing method for ultra-high molecular weight polyethylene fibers and washing device

Abstract

The invention discloses a preparing method for ultra-high molecular weight polyethylene fibers. The method specifically includes the following steps that firstly, a spinning solution is prepared; secondly, spinning is conducted; thirdly, extracting is conducted; fourthly, drying is conducted; fifthly, drafting is conducted; a washing step is added between the third step and the fourth step, and according to the washing step, thread lines which are discharged from an extracting groove are washed in a washing groove, a second solvent and a residual first solvent which are carried on the surfaces of the thread lines are removed, and the washed thread lines are sent to the four step to be dried. According to the preparing method for ultra-high molecular weight polyethylene fibers, the washing technology is added after extracting in an existing preparation technology processes for ultra-high molecular weight polyethylene fibers, and the preparing method for ultra-high molecular weight polyethylene fibers has the advantages that the fibers are lower in solvent content rate, manufactured finished products are higher in strength, the hand feeling is soft, and subsequent processing is facilitated; the production process of the technology is safe, toxicity and pollution are avoided, and environment friendliness is facilitated; the solvent is recycled, the solvent dosage is reduced, and cost is saved; the technology is simple, the process is short, and operation is convenient. The invention further discloses a washing device used in the preparing method.

Description

technical field

[0001] The invention discloses a preparation method of ultra-high molecular weight polyethylene fiber (UHMWPE) and a washing device. Background technique

[0002] High-strength high-modulus polyethylene fiber, carbon fiber, and aramid fiber are known as the three major high-tech fibers in the world today. Because of their extremely high molecular weight, good combination of main chains, high orientation and crystallinity, and the highest strength of all new chemical fiber materials today, they are among the most advanced fiber materials. Lightweight composite materials have shown great advantages and are widely used in many fields such as national defense, security protection, aerospace, navigation, weapons, shipbuilding, etc., and become the fastest growing high-performance fiber at present. High-strength high-modulus polyethylene fiber is also one of the high-tech projects that my country's "Tenth Five-Year Plan" focuses on and the special fiber varieties e...

Examples

Embodiment 1

[0027] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, comprises the following steps:

[0028] (1) Prepare spinning solution. Inject ultra-high molecular weight polyethylene (relative average molecular weight 3.5 million) powder, 70# solvent white oil and phenolic antioxidant into the unwrapping kettle at a mass ratio of 8:100:0.16, and shear under nitrogen protection. For 25 minutes, the shear rate is 3000 seconds-1, and the mixture is evenly mixed to prepare a polyethylene spinning solution.

[0029] (2) spinning. Add the polyethylene spinning solution in step (1) into a screw extruder and extrude from the screw extruder. In this example, the screw extruder is twin-screw, the diameter of the screw extruder is 125mm, the ratio of length to diameter is 64, the temperature of the screw is 285°C, and the rotation speed is 180rpm. The extrudate output by the screw extruder passes through the filter, After the spin...

Embodiment 2

[0038] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, comprises the following steps:

[0039] Steps (1) preparation of spinning solution, (2) spinning, (3) extraction, step (5) drying, (6) drawing in this example are the same as in Example 1, the difference lies in the water washing step of step (4) .

[0040] see figure 2 , the washing device used in the water washing step of this embodiment includes a washing tank 100a, the notch of the washing tank 100a is upward, and the two sides above the silk inlet side tank wall 110a and the silk outlet side tank wall 120a of the water washing tank 100a are Godet rollers 210a, 220a are arranged on the side, and a godet roller 230a is arranged at the bottom of the washing tank 100a; an overflow port 121a is arranged on the silk outlet side tank wall 120a of the washing tank 100a, and the overflow port 121a is connected to a The overflow return pipe 140a, the other end o...

technical field

[0001] The invention discloses a preparation method of ultra-high molecular weight polyethylene fiber (UHMWPE) and a washing device. Background technique

[0002] High-strength high-modulus polyethylene fiber, carbon fiber, and aramid fiber are known as the three major high-tech fibers in the world today. Because of their extremely high molecular weight, good combination of main chains, high orientation and crystallinity, and the highest strength of all new chemical fiber materials today, they are among the most advanced fiber materials. Lightweight composite materials have shown great advantages and are widely used in many fields such as national defense, security protection, aerospace, navigation, weapons, shipbuilding, etc., and become the fastest growing high-performance fiber at present. High-strength high-modulus polyethylene fiber is also one of the high-tech projects that my country's "Tenth Five-Year Plan" focuses on and the special fiber varieties e...

Examples

Embodiment 1

[0027] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, comprises the following steps:

[0028] (1) Prepare spinning solution. Inject ultra-high molecular weight polyethylene (relative average molecular weight 3.5 million) powder, 70# solvent white oil and phenolic antioxidant into the unwrapping kettle at a mass ratio of 8:100:0.16, and shear under nitrogen protection. For 25 minutes, the shear rate is 3000 seconds-1, and the mixture is evenly mixed to prepare a polyethylene spinning solution.

[0029] (2) spinning. Add the polyethylene spinning solution in step (1) into a screw extruder and extrude from the screw extruder. In this example, the screw extruder is twin-screw, the diameter of the screw extruder is 125mm, the ratio of length to diameter is 64, the temperature of the screw is 285°C, and the rotation speed is 180rpm. The extrudate output by the screw extruder passes through the filter, After the spin...

Embodiment 2

[0038] The present embodiment provides a kind of preparation method of ultra-high molecular weight polyethylene fiber, comprises the following steps:

[0039] Steps (1) preparation of spinning solution, (2) spinning, (3) extraction, step (5) drying, (6) drawing in this example are the same as in Example 1, the difference lies in the water washing step of step (4) .

[0040] see figure 2 , the washing device used in the water washing step of this embodiment includes a washing tank 100a, the notch of the washing tank 100a is upward, and the two sides above the silk inlet side tank wall 110a and the silk outlet side tank wall 120a of the water washing tank 100a are Godet rollers 210a, 220a are arranged on the side, and a godet roller 230a is arranged at the bottom of the washing tank 100a; an overflow port 121a is arranged on the silk outlet side tank wall 120a of the washing tank 100a, and the overflow port 121a is connected to a The overflow return pipe 140a, the other end o...

Images