X-ray shielding fibre and manufacture method thereof

A ray shielding and fiber technology, which is applied in the field of shielding fiber and its manufacturing, can solve the problems of inability to strengthen materials, poor fiber strength and processing performance, and achieve the effect of simplifying the manufacturing process and improving the effect

Inactive Publication Date: 2008-08-20
DONGHUA UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] X-ray shielding fibers prepared by conventional spinning methods have poor strength and processability and cannot be used as reinforcement materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw material: polyvinyl alcohol powder, polymerization degree 1750, barium sulfate: polyvinyl alcohol powder (wt% 40: 60) solvent is dimethyl sulfoxide.

[0027] According to the solution concentration of 20% ingredients. Swelling time is 10 minutes, temperature: 50°C, twin-screw temperature, one-stage area: 170°C; second-stage area: 175°C; third-stage area: 180°C.

[0028] Booster pump temperature, 165°C, pressure 80kg / cm 2 . Spinning assembly pressure, 70kg / cm 2 .

[0029] Coagulation bath temperature, -1°C. Primary stretching ratio: 2.6, stretching temperature: 50°C. Tensile speed: 45m / mm. Extraction solution: anhydrous methanol, the extraction retention time is 3 minutes. The secondary stretching ratio is 2.9 times, and the stretching temperature is 85°C; the tertiary stretching ratio is 3.5 times, and the stretching temperature is 115°C. Hot air setting at 115°C, measured PVA monofilament diameter: 0.45mm, strength: 2.2cN / dtex; modulus: 31cN / dtex; elongatio...

Embodiment 2

[0031] Raw material: polyethylene powder, molecular weight: 2×10 6 . Barium sulfate: polyethylene powder (wt% 50:50) solvent is white oil.

[0032] According to the solution concentration of 10% ingredients. Swelling time: 45 minutes, temperature: 100°C.

[0033] The temperature of the double helix zone: the first zone: 175°C; the second zone: 185°C; the third zone: 188°C.

[0034] Booster pump temperature: 170°C, pressure 85kg / cm.

[0035] Spinning assembly pressure: 75kg / cm 2 .

[0036] Coagulation bath temperature: -6°C. Primary stretching ratio: 2.75, stretching temperature 65°C, stretching speed 60m / min. Extract xylene, extract and keep for 3.5 minutes. The secondary stretching ratio is 2.95 times, the stretching temperature is 95°C, the tertiary stretching ratio is 3.4 times, and the stretching temperature is 135°C. Hot air setting at 125°C. The measured PE monofilament diameter is 0.45mm, fiber strength: 15.3cN / dtex; modulus: 152cN / dtex; elongation: 5%.

Embodiment 3

[0038] Raw material: polypropylene powder, molecular weight 5×10 5 . Barium sulfate: polypropylene powder (wt% 40:60) solvent is white oil.

[0039] According to the solution concentration of 10% ingredients. Swelling time: 20 minutes, temperature: 120°C.

[0040] Twin-screw temperature: first section: 180°C; second section: 190°C; third section: 195°C.

[0041] Booster pump temperature: 195°C, pressure 80kg / cm 2 . Spinning assembly pressure: 75kg / cm 2 .

[0042] Coagulation bath temperature: -7°C. Primary stretching ratio: 2.5 times, stretching temperature 70°C, stretching speed 60m / min. Extract gasoline: extraction residence time 3 minutes. The secondary stretching ratio is 2.85 times, and the stretching temperature is 95°C; the tertiary stretching ratio is 3.5 times, and the stretching temperature is 140°C. The hot air setting temperature is 145°C, the fiber strength is 11cN / dtex, the modulus is 104cN / dtex, and the elongation is 9%.

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Abstract

The invention relates to an X-ray shielding fiber and a production method thereof. The preparation steps comprise that: (1) polymer solution is prepared and barium sulfate powder is added for swelling; (2) the swollen polymer mixed with barium sulfate powder is fully dissolved by using a double screw extruder and the mixture is extruded by a booster pump, a metering pump and a spinning assembly and formed into gel filament in freezing liquid; (3) the gel filament is extracted by ultrasonic, dried by hot wind and stretched and formed for a plurality of levels to be shaped into the X-ray shielding fiber. The fiber can be applied to reinforced concrete to detect the fiber distribution in fiber reinforced concrete, or fiber reinforced material in the building concrete of high dosage X-ray radiation region. The fiber can play an auxiliary role in preventing leakage of X-ray.

Description

technical field [0001] The invention belongs to shielding fiber and its manufacturing method, in particular to a kind of fiber used for strengthening concrete, which can detect the distribution of reinforcing fibers in fiber reinforced concrete or play the role of X-ray shielding, and its manufacturing method. Background technique [0002] Fiber concrete has high strength, high toughness, high crack resistance, high durability, high volume stability and excellent workability. However, since it is impossible to know the distribution of fibers in concrete without damaging the concrete, the mechanism and function of fibers in concrete are now mainly based on theoretical speculation, research from a macroscopic perspective, or destructive testing, resulting in unreasonable Necessary waste, so it is necessary to study a non-destructive detection method. [0003] A fiber capable of absorbing X-rays developed by the present invention can be used to detect the distribution of fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/14D01F6/04D01D5/00C04B16/06
Inventor 王志鑫王依民何唯平王娅颉汤惠工倪建华张杰
Owner DONGHUA UNIV
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