Preparation method of coarse denier polyester monofilaments, engineering composite material wrapped stiffener and preparation method thereof

An engineering composite material, a technology of wrapping reinforcing ribs, applied in the directions of building reinforcements, spinneret assemblies, filament generation, etc., can solve the problems of reducing the strength of monofilament, insufficient strength, melting, etc. Effects of friction, increased grip and pull-out work, increased groove depth

Inactive Publication Date: 2010-12-01
SHANGHAI KNP CHEM +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Round ordinary coarse denier polyester monofilament has the defects of smooth surface, insufficient friction as a composite material, and insufficient gripping force with the substrate. It must be processed by high-temperature hot roller indentation, but it will reduce the monofilament intensity and consume energy, increasing production costs
[0005] (2) Rectangular thick-denier polypropylene monofilament has the disadvantage of poor heat resistance, and the use temperature is lower than 180°C, otherwise it will melt, and the low strength cannot significantly enhance the reinforcing effect on the substrate;
[0006] (3) The disadvantage of other polymer monofilaments with different cross-sections is that the shrinkage rate is small, and it cannot be shrunk at high temperature to achieve the effect of increasing the grip force
[0007] The monofilame

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The intrinsic viscosity of raw polyester chips is 0.86; the drying temperature of polyester chips under vacuum conditions is: 75°C for 1 hour, 115°C for 2 hours, and 135°C for 6 hours; screw melting temperature: cooling feed zone 50°C, preheating Zone 265°C, melting zone 305°C, compression zone 310°C, metering zone 310°C; the number of parallel holes arranged linearly has 4 holes, the hole diameter is 2.8mm, the hole spacing is 0.45mm, the temperature of the spinning die is 280°C, and the solidification The temperature of the bath (water bath) is 50°C, the stretching ratio of the spinneret is 3.2 times, the post-stretching ratio is 2.5 times, the stretching speed is 75m / min, and the setting temperature is 80°C; the base material of the wrapped composite material is glass fiber and epoxy resin; The material setting temperature is 175°C, and the time is 30 minutes. Measure the diameter thickness (short arc) 0.58mm of the coarse denier polyester monofilament that makes, wi...

Embodiment 2

[0022] The intrinsic viscosity of raw polyester chips is 0.89; the drying temperature of polyester chips under vacuum conditions is: 55 °C for 1 hour, 125 °C for 2 hours, and 135 °C for 5 hours; screw melting temperature: cooling feed zone 70 °C, preheating Zone 275°C, melting zone 310°C, compression zone 315°C, metering zone 310°C; the number of parallel holes arranged linearly has 5 holes, the hole diameter is 3.0mm, and the hole spacing is 0.55mm; the temperature of the spinning die is 289°C, and the solidification The bath temperature is 70°C, the spinneret stretching ratio is 3.5 times, the post-stretching ratio is 2.2 times, the stretching speed is 90m / min, and the shaping temperature is 85°C; the base material of the wrapped composite material is carbon fiber and epoxy resin; the shaping temperature of the composite material is 150 ℃, setting time is 45min. Measure the diameter thickness (short arc) 0.70mm of the coarse denier polyester monofilament that makes, width (l...

Embodiment 3

[0024] The intrinsic viscosity of raw polyester chips is 0.95; the drying temperature of polyester chips under vacuum conditions is: 80°C for 1 hour, 120°C for 2 hours, and 135°C for 5 hours; screw melting temperature: cooling feed zone 55°C, preheating Zone 285°C, melting zone 310°C, compression zone 315°C, metering zone 315°C; the number of parallel holes arranged linearly is 6 holes, the hole diameter is 3.2mm, and the hole spacing is 0.60mm; the temperature of the spinning die is 295°C, and the solidification The bath temperature is 85°C, the spinneret stretching ratio is 3.8 times, the post-stretching ratio is 2.0 times, the stretching speed is 105m / min, the setting temperature is 90°C, the base material of the wrapped composite material is glass fiber and epoxy resin; the composite material setting temperature 165°C, setting time is 40min. Measure the diameter thickness (short arc) 0.72mm of the thick denier polyester monofilament that makes, width (long arc) 3.65mm, hea...

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Abstract

The invention discloses a preparation method of coarse denier polyester monofilaments, an engineering composite material wrapped stiffener and a preparation method thereof. Viscosified polyester chips are fused through a screw after dried, are squeezed by parallel porous spinneret plates, are cooled and extended through a cooling bath after extruded and adhered by spray mouths, and are shaped and wound under low temperature after a post extension outside the cooling bath, after the prepared coarse denier polyester monofilaments are preliminarily wrapped in the outer surface of an engineering composite material, the composite material slowly passes through a high-temperature setting stretcher, wherein high temperature can result in reaction of binding material in the composite material and a great amount of dissipated heat, the wrapped coarse denier polyester monofilaments shrink after heated and can tightly wrap the surface of the composite material and form uniformly spiral grooves on the surface of the composite material. The coarse denier polyester monofilaments have greater thermal shrinkage, stresses among fiber molecules can release under a heating condition in wrapping the engineering composite material, so as to form larger shrinkage force and enlarge the surface concave-convex property and the friction force of the engineering composite material.

Description

technical field [0001] The invention relates to a method for preparing a coarse-denier polyester monofilament, in particular to a method for preparing a multi-curved high-shrinkage polyester monofilament. [0002] The present invention also relates to a preparation method of the engineering composite material wrapped reinforcing rib containing the above-mentioned coarse denier polyester monofilament, and the prepared engineering composite material wrapped reinforcing rib. Background technique [0003] Existing monofilament technologies for engineering composites include: [0004] (1) Round ordinary coarse denier polyester monofilament has the defects of smooth surface, insufficient friction as a composite material, and insufficient gripping force with the substrate. It must be processed by high-temperature hot roller indentation, but it will reduce the monofilament intensity and consume energy, increasing production costs. [0005] (2) Rectangular thick-denier polypropylen...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D1/09D01D4/02D01D10/00D01D11/00E04C5/07
Inventor 张杰倪建华庄园园郑伟王依民何唯平
Owner SHANGHAI KNP CHEM
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