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Pneumatic stirring dispersion device for clustered fibers

A pneumatic stirring and dispersing device technology, which is applied in fiber processing, textiles, papermaking, non-woven fabrics, etc., to achieve the effect of increasing expansion rate, simple process flow, and increasing strength and quality

Active Publication Date: 2013-04-03
湖南亚太实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the glass fibers are dispersed to form glass fiber bundles, and the formed glass fiber monofilaments are few, the length of the glass fibers is 4-20 mm, the mass of the glass fiber bundles in the glass fiber and matrix mixture is 30-40%, and the PP powder The content is 70-40%, and the density of the plate is relatively high, but the plate of this process can only be used in semi-structural materials for automotive interiors

Method used

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  • Pneumatic stirring dispersion device for clustered fibers
  • Pneumatic stirring dispersion device for clustered fibers
  • Pneumatic stirring dispersion device for clustered fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Raw materials: E-glass fiber 2400tex (twisted roving, density 2.35g / cm 3 , diameter 13μm), glass fiber bundle shear length 60mm, 145# polypropylene PP powder (density 0.91g / cm 3 , 80 mesh), the mass ratio of glass fiber to PP powder is 63:37.

[0040] Pneumatic stirring, dispersing and mixing of the present invention forms a mesh embryo mat and the surface density of the sheet is 1350g / m 2 , sheet density 0.65g / cm 3 , Sheet thickness δ3.2mm, after testing, the transverse tensile strength of the sheet is 12.68Mpa, the longitudinal tensile strength of the sheet is 11.98Mpa; the transverse bending strength of the sheet is 10.97Mpa, the longitudinal bending strength of the sheet is 9.86Mpa; the elongation at break is 3.12 %, the expansion rate of the sheet is 495%.

Embodiment 2

[0042] Raw materials: E-glass fiber 2400tex (twisted roving, density 2.35g / cm3 , diameter 13μm), glass fiber bundle cut length is 55mm, 145#PP powder (density 0.91g / cm 3 , 80 mesh), the mass ratio of glass fiber to PP powder is 60:40.

[0043] Pneumatic stirring, dispersing and mixing of the present invention forms a mesh embryo mat and the surface density of the sheet is 1350g / m 2 , sheet density 0.76g / cm 3 , Sheet thickness δ3.0mm, after testing, the transverse tensile strength of the sheet is 13.78Mpa, the longitudinal tensile strength of the sheet is 12.46Mpa; the transverse bending strength of the sheet is 11.68Mpa, the longitudinal bending strength of the sheet is 10.38Mpa; the elongation at break is 2.96 %, the expansion rate of the sheet is 520%.

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Abstract

The invention discloses a pneumatic stirring dispersion device for clustered fibers, and the device is characterized in that an inner conical hopper (10) is provided with a disperse upflow nozzle (12) and multiple groups of electrostatic jet nozzles (13); the inner conical hopper (10) is provided with an jet orifice (11), the jet orifice (11) is in butt joint with an jet airflow inlet (7) and a conveying pipeline (6), and an outer conical hopper (9) is provided with a fluctuating airflow inlet (8); a pneumatic dispersing / mixing chamber (17) is connected with the outer conical hopper (9), and the pneumatic dispersing / mixing chamber (17) is provided with multiple groups of clockwise lateral stirring / cutting airflow nozzles (14) and counterclockwise lateral mixing / cutting airflow nozzles (15); the clockwise lateral stirring / cutting airflow nozzles (14) and the counterclockwise lateral mixing / cutting airflow nozzles (15) are communicated with an air source; and the clockwise lateral stirring / cutting airflow nozzles (14) and the counterclockwise lateral mixing / cutting airflow nozzles (15) are respectively arranged in different planes. By using the device disclosed by the invention, a cut long fiber bundle can be dispersed fully so as to form clustered fibers, thereby improving the uniform effect of adhesion between fibers and mixed powder, and reducing the content of mixed powder in base felts.

Description

technical field [0001] The invention relates to a stirring and dispersing device, in particular to a clustered fiber pneumatic stirring and dispersing device. Background technique [0002] At present, glass fiber reinforced thermoplastic composite panels (Glass mat reinforced thermoplastics) commonly used in domestic and foreign automotive interiors, referred to as GMT panels. Regardless of the wet process or dry process, the fiber orientation in this type of board is obvious, resulting in the longitudinal and transverse strength ratios of the wet process composite plate fibers being greater than 1:2.2, and the dry process composite plate fiber longitudinal and transverse strength ratios being greater than 1 : 1.5, and the uniformity of the carded and needle-punched fiber-based felt in the dry process is poor, and the unevenness is 4% to 7%. The weight per unit area is achieved, and the light material reduction effect is not significant; in addition, because the base felt o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/05D01G21/00
Inventor 董升顺戴宏亮蒋建云汤青红
Owner 湖南亚太实业有限公司
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