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Plant fiber impregnation device and method

A plant fiber and impregnation device technology, which is applied in the field of plant fiber impregnation devices and plant fiber impregnation molten resin reinforcement materials, can solve the problems of poor impregnation effect, fiber tow breakage, unsuitable for natural fibers, etc., and achieve the effect of improving the impregnation effect

Active Publication Date: 2015-08-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process of the melt impregnation method is simple and the impregnation effect is good, the continuous fiber needs to bypass the impregnation rollers arranged in zigzag up and down during the melt impregnation preparation process, and the fiber needs to bear a relatively large tension force, so there are many melt impregnation equipment disclosed at present. It is suitable for the melt impregnation of fiber tow with continuous single fiber and high traction strength, such as glass fiber and carbon fiber. For the melt impregnation of single discontinuous natural plant fiber strip, if the fiber strip is not twisted, it is easy to produce fiber filaments bundle breakage, and the traction strength of fiber strips increases after twisting. Although the requirements of melt impregnation are met, the fibers are dense after twisting, and the impregnation effect is poor, and dry threads are prone to occur. Therefore, the currently disclosed melt impregnation equipment is not suitable for natural fiber

Method used

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  • Plant fiber impregnation device and method
  • Plant fiber impregnation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 and figure 2 As shown, the following device is used for impregnating natural plant fibers with molten resin: comprising a melt impregnation mold 1 and a cooling roll pressing device 2, wherein the melt impregnation mold 1 includes a mold cavity, a material inlet and 4 to 8 parts located in the mold cavity A pair of dipping rollers, the pair of dipping rollers is installed in the U-shaped groove 1-1 of the mould, each pair of dipping rollers is composed of an upper dipping roller 6, a lower dipping roller 5 and a dipping roller spring 7, and the upper dipping roller 6 is composed of an upper dipping roller The fixed circle 6-1 and the upper impregnated roller shaft 6-2 are composed, the lower impregnated roller is composed of the lower impregnated roller fixed circle 5-1 and the lower impregnated roller shaft 5-2, and the upper impregnated roller 6 and the lower impregnated roller 5 are cylinders Shaped, installed in the molten impregnation mold 1 by m...

Embodiment 2

[0039] The device used in this embodiment is the same as in Embodiment 1.

[0040] Combing the continuous jute fibers into strips to obtain continuous jute fiber strips;

[0041] Heat and melt the impregnation mold at 1 to 200°C and keep it warm for a period of time;

[0042] Open the melting impregnation mold 1, the continuous jute fiber strip is passed between several pairs of dipping rolls 5 and the upper dipping roll 6, the dipping roll spring 7 makes the upper and lower dipping rolls have a certain pressure to improve the friction between the fibers, thereby Improving the traction strength of the natural fiber strips, while adding the plasticized low-density polyethylene molten resin from the feed port 4 to the melting impregnation mold 1, so that the continuous natural fiber strips and the thermoplastic resin melt are melt-impregnated;

[0043] The continuous jute fiber strip soaked and wrapped by the low-density polyethylene molten resin passes between the upper press ...

Embodiment 3

[0046] The device used in this embodiment is the same as in Embodiment 1.

[0047] Combing the continuous ramie fibers into strips to obtain continuous ramie fiber strips;

[0048] Heat and melt the impregnation mold at 1 to 210°C and keep it warm for a period of time;

[0049] Open the melting impregnation mold 1, pass the continuous ramie fiber strip between several pairs of dipping rollers 5 and 6, and the dipping roller spring 7 makes the upper and lower dipping rollers have a certain pressure to improve the friction between the fibers, thereby Improving the traction strength of the natural fiber strips, while adding the plasticized high-density polyethylene molten resin from the feed port 4 to the molten impregnation mold 1, so that the continuous natural fiber strips and the thermoplastic resin melt are melt-impregnated;

[0050] The continuous ramie fiber strip soaked and wrapped by the high-density polyethylene molten resin passes between the upper pressure roller 9 a...

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Abstract

The invention relates to a plant fiber impregnation device and method applicable to natural plant fiber impregnation molten resin. The plant fiber impregnation device comprises a melting and impregnation die (1) and a cooling and rolling device (2), wherein the melting and impregnation die (1) comprises a die cavity, a feed inlet (4) and 4-8 and impregnation roller pairs located in the die cavity, each impregnation roller pair comprises an upper impregnation roller (6), a lower impregnation roller (5) and an impregnation roller spring (7), and the impregnation roller spring (7) applies certain elastic pressure to the upper impregnation roller (6) to allow certain pressure to exist between the upper impregnation roller (6) and the lower impregnation roller (5); the cooling and rolling device (2) comprises 2-4 compression roller pairs, each compression roller pair comprises an upper compression roller (9), a lower compression roller (10) and a compression roller spring (8), and the compression roller spring (8) applies certain elastic pressure to the upper compression roller (9) to allow certain pressure to exist between the upper compression roller (9) and the lower compression roller (10). The plant fiber impregnation device has the advantages that natural plant fibers are carded into strips and pass the plant fiber impregnation device, and natural long fiber reinforced thermoplastic polymer pre-impregnated materials.

Description

technical field [0001] The present invention relates to an impregnating device, in particular to a plant fiber impregnating device; the application also relates to a method for using the plant fiber impregnating device to impregnate natural plant fibers with molten resin, and the plant fiber impregnated molten resin reinforcing material obtained by the method . Background technique [0002] Restricted by the shape of natural fibers, natural fiber reinforced thermoplastic polymer composites are mainly short fiber (fiber length 0.2-0.4mm) reinforced thermoplastic polymer composites. The main preparation process is to add the initially mixed fibers and materials to the internal mixer Or twin-screw extruder for mixing and granulation, and then through injection molding, extrusion or molding to form products, because the fiber is shortened by the shear of the screw during the granulation process, the strength of the obtained product is affected, and it is difficult to meet the st...

Claims

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Application Information

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IPC IPC(8): B29C70/50B29C70/56B29C70/54
CPCB29C70/506B29C70/54B29C70/56
Inventor 薛平丁筠龙洪生贾明印张扬
Owner BEIJING UNIV OF CHEM TECH
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