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Method and device for preparing chopped fiber continuous orientation felt

A chopped fiber and orientation technology, applied in the field of fiber fabric materials, can solve the problems of inability to continuously and efficiently prepare chopped fiber orientation mats on a large scale, and achieve high controllability of width, length and fiber content, high degree of automation, The effect of energy saving and environmental protection of the device

Active Publication Date: 2017-05-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a preparation method and production device of chopped fiber continuous oriented mat to solve the technical problem that the chopped fiber oriented mat cannot be prepared continuously, efficiently and on a large scale in the prior art

Method used

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  • Method and device for preparing chopped fiber continuous orientation felt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dispersion: first add 40L of water to the dispersing device, weigh 250g of hydroxyethyl cellulose and add it to the dispersing device (13), start the stirring and dispersing device, the dispersing time is 20min, and the stirring speed is 200r / min; then weigh the chopped carbon fiber (Toray company T700 chopped carbon fiber, fiber length is 4mm) 160g is added in the dispersing device, and the stirring speed is increased to 500r / min, and the dispersion time is 5min, and the chopped carbon fiber suspension with good dispersibility is obtained and added to the stirring tank. (14) in the feeding device, now the viscosity of the fiber suspension is 0.8Pa.s; the dispersion work continues in the process of preparing the T700 chopped carbon fiber continuous orientation mat, to supplement the consumption of the fiber suspension in the storage device;

[0038] Orientation: The chopped fiber suspension dispersed in the storage device is introduced into the tapered orientation nozzle...

Embodiment 2

[0044] Dispersion: first add 40L of water to the dispersing device, weigh 200g of hydroxypropyl cellulose and add it to the dispersing device (13), start the stirring and dispersing device, the dispersing time is 30min, and the stirring speed is 300r / min; then weigh the chopped glass Add 150g of fiber (fiber length: 10mm) into the dispersing device, increase the stirring speed to 800r / min, and disperse for 10 minutes to obtain a well-dispersed chopped glass fiber suspension and add it to the stirring storage device (14) , the viscosity of the fiber suspension at this time is 1.2Pa.s;, the dispersion work continues in the process of preparing the chopped glass fiber continuous orientation mat, to supplement the consumption of the fiber suspension in the storage device;

[0045] Orientation: The dispersed chopped glass fiber suspension in the storage device is introduced into the tapered orientation nozzle, and then flattened on the continuously running conveyor belt after passin...

Embodiment 3

[0051] Dispersion: first add 40L of water to the dispersing device, weigh 400g of hydroxyethyl cellulose and add it to the dispersing device (13), start the stirring and dispersing device, the dispersing time is 30min, and the stirring speed is 400r / min; then weigh the chopped carbon fiber (Fiber length is 15mm) 100g is added in the dispersing device, and the stirring speed is increased to 1000r / min, and the dispersing time is 20min, and the chopped carbon fiber suspension with good dispersibility is added to the stirring storage device (14). When the viscosity of the fiber suspension was 2.4Pa.s; the dispersion work continued in the process of preparing the chopped carbon fiber continuous orientation mat to supplement the consumption of the fiber suspension in the storage device;

[0052] Orientation: The chopped carbon fiber suspension dispersed in the storage device is introduced into the tapered orientation nozzle, and spread on the continuously running conveyor belt after ...

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Abstract

The invention provides a method for preparing chopped fiber continuous orientation felt and belongs to the field of fiber fabric. The method comprises the following processes: dispersion, orientation, separation, drying and rolling, wherein in the orientation process: a chopped fiber suspension dispersed in a storage device is introduced into reducing orientation nozzles and is spread on conveying mesh belt running continuously after passing through the reducing orientation nozzles; in the separation process: moisture and a dispersant in the chopped fiber suspension on the conveying mesh belt are separated by negative pressure suction box located below the conveying mesh belt, and wet chopped fiber continuous orientation felt is obtained after washing. The device has high degree of automation, the prepared chopped fiber continuous orientation felt is high in controllability of thickness, width, length and fiber content, the orientation degree of chopped fibers in the chopped fiber continuous orientation felt is high, and the orientation structure is uniform; the device is energy-saving, environment-friendly, high-quality and efficient, the problems of low production efficiency and the failure in continuous and large-scale production are solved, and technical guarantee is provided for industrial application of the chopped fiber orientation felt.

Description

[0001] Technical field: [0002] The invention belongs to the field of fiber fabric materials, in particular to a method and a device for large-scale preparation of chopped fiber continuous orientation mat. [0003] Background technique: [0004] Chopped fiber reinforced composite materials not only have the advantages of general fiber reinforced composite materials, such as corrosion resistance, fatigue resistance, high specific strength and specific modulus, good thermal stability and designability, but also have simple processing technology, The advantages of lower production costs have attracted more and more attention from industry and academia. [0005] The length of chopped fibers is generally 3-15cm, with a high degree of anisotropy. The performance of the reinforced composite material is related to the fiber type, the interface bonding state between the fiber and the matrix, the fiber length, the fiber content, and the fiber orientation state. For a specific short fib...

Claims

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Application Information

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IPC IPC(8): D21F11/02D21H15/02D21H13/50D21H13/40D21H21/08D21H17/26
CPCD21F11/02D21H13/40D21H13/50D21H15/02D21H17/26D21H21/08
Inventor 贾晓龙罗国昕李燕杰荣亚鹏杨小平
Owner BEIJING UNIV OF CHEM TECH
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