Production method of fine-denier hollow nylon 6FDY filament

A production method and nylon technology, which are applied in the manufacture of hollow filaments, single-component polyamide rayon filaments, and rayon manufacturing, to achieve the effects of reducing floating filaments, improving post-processing performance, and uniform cooling

Inactive Publication Date: 2010-07-07
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fine-denier nylon fibers on the market generally have a single-filament fineness above 1dtex, and hollow nylon fiber products are relatively few, and the single-filament fineness is generally above 3dtex. There are currently no fine-denier hollow nylon fiber products with a single-filament fineness below 1.0dtex. See the report

Method used

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  • Production method of fine-denier hollow nylon 6FDY filament
  • Production method of fine-denier hollow nylon 6FDY filament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw materials: 100 parts by weight of PA6 slices with a viscosity of 2.5±0.05; special masterbatches for fine-denier nylon are added with the second main group metal salt—calcium chloride, and the addition amount is 6% of the weight of nylon slices; special masterbatches for fine-denier nylon The dosage is 2% of the mass of PA6 slices.

[0024] Equipment parameter adjustment: the position of the cluster point is 600mm away from the spinneret; the hole diameter of the hollow spinneret

[0025] The diameter is 0.20mm, and the aspect ratio is 1:3mm; the metal sand filter adopts 60~80 mesh; the length of the ring blowing sleeve of the ring blowing device is 50cm, and the length of the polycooling air pipe is 40cm.

[0026] Process conditions: the wind speed of the ring blower is 0.3m / s, the temperature is 28°C, and the humidity is 80%; the temperature of the spinning box is 283°C; the temperature of the screw extruder is 260~290°C, and the head pressure in the spinning asse...

Embodiment 2

[0028] Raw materials: 100 parts by weight of PA6 slices with a viscosity of 2.5±0.05, adding the second main group metal salt—calcium acetate, the amount of which is 6% of the weight of the nylon slices; the amount of fine-denier nylon masterbatches is PA6 4% of slice mass.

[0029] Equipment parameter adjustment: the position of the cluster point is 600mm away from the spinneret; the hole diameter of the hollow spinneret is 0.20mm, and the length-to-diameter ratio is 1:3mm; the metal sand filter adopts 60-80 mesh; the length of the ring blowing sleeve of the ring blowing device is 50cm , Poly cold air duct length 40cm.

[0030] Process conditions: the wind speed of the ring blower is 0.3m / s, the temperature is 28°C, and the humidity is 80%; the temperature of the spinning box is 282°C; the temperature of the screw extruder is 260~290°C, and the head pressure in the spinning assembly is 12~18Mpa, spinning and winding speed is 4300m / min. The PA6 melt is extruded through a hol...

Embodiment 3

[0032] Raw materials: 100 parts by weight of PA6 slices with a viscosity of 2.5±0.05, fine-denier nylon masterbatches are added with the second main group metal salt—magnesium sulfate, and the amount added is 6% of the weight of nylon slices; the amount of fine-denier nylon masterbatches is 5% of PA6 slice mass.

[0033] Equipment parameter adjustment: the position of the cluster point is 600mm away from the spinneret; the hole diameter of the hollow spinneret is 0.20mm, and the length-to-diameter ratio is 1:3mm; the metal sand filter adopts 60-80 mesh; the length of the ring blowing sleeve of the ring blowing device is 50cm , Poly cold air duct length 40cm.

[0034] Process conditions: the wind speed of the ring blower is 0.3m / s, the temperature is 28°C, and the humidity is 80%; the temperature of the spinning box is 278°C; the temperature of the screw extruder is 260-290°C, and the head pressure in the spinning assembly is 12~18Mpa, spinning and winding speed is 4600m / min. ...

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Abstract

The invention relates to a production method of a fine-denier hollow nylon 6FDY filament. The technical problem to be solved is as follows: the denier of the produced nylon fiber is lower than 1.0dtex. The weight ratio of the nylon chips with specific viscosity requirements and fine-denier nylon master batch adopted by the invention is 1:20 50. in the process route, 1) a spinning pack keeps steady pressure: 12 - 18MPa; 2) metal sand filter of 40 - 100 meshes is adopted; 3) the bore diameter of the hollow spinneret plate is 0.15 - 0.30mm, the aspect ratio is 2 - 4; 4) a slow-cooling device (1) is arranged at the back of the spinning pack, the slow-cooling device is a ring-shaped heating cap with temperature of 160 - 180 degrees C., and a wind-free zone (2) with height of 20-40 cm is formed between the slow-cooling device (1) and a ring-shaped air-blowing device (3); 5) the location of the cluster point is uplifted; 6) the winding speed of spinning is 3000-5000m / min.

Description

technical field [0001] The invention relates to an artificial filament, in particular to a method for producing fine denier hollow nylon 6 FDY filament. Background technique [0002] Hollow fiber refers to a chemical fiber with a thin tubular cavity in the axial direction of the fiber. It is usually made of annular hollow, C-shaped or eccentric hollow spinneret through melt (or solution) spinning to form a series of products. Because it contains a large amount of still air, it can bring light elasticity, good moisture permeability and comfortable warmth to its fabric. It can be widely used in thermal underwear, underwear, sportswear, casual clothing, shirts, outdoor sports and blankets and other fields. [0003] At present, the hollow fibers are mostly polyester and polypropylene. Hollow polyester fiber was first introduced into my country from Japan, and it mainly produces glued cotton for use in the field of clothing. There is a hollow cavity in the middle of the hollow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/24D01F6/90
Inventor 马清芳来国桥郝超伟蒋剑雄徐怡庄陆达天
Owner HANGZHOU NORMAL UNIVERSITY
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