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A kind of refined processing method of kenaf fiber

A technology of kenaf fiber and processing method, which is applied in the field of hemp fiber processing, can solve the problems of large amount of chemicals used, short kenaf fiber, low strength, etc., achieve good spinnability, reduce production cost and consumption small effect

Active Publication Date: 2019-01-01
QINGDAO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a fine processing method of kenaf fiber, which overcomes the time-consuming and large amount of chemicals used in the degumming method of the prior art, and the prepared kenaf fiber is short, thick and hard. , low strength and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The processing method is as follows:

[0059] Cut kenaf bast into 10cm long sections, soak in ethylenediamine (bath ratio 1:10), seal it and place it in a shaking box, shake it at room temperature for 12 hours, and place it in a freeze dryer after taking it out Freeze-dry for 8 hours at -55°C.

[0060] Freeze-dried kenaf raw materials do not need to be washed, directly put into the steam flash explosion device, heat to make the water vapor pressure 1.0MPa, keep this pressure for 3 minutes, then open the valve, quickly release the pressure, and collect the spray from the steam flash explosion equipment. The kenaf fiber that goes out, repeats this step 2 times, then carries out three water washings to the collected fiber.

[0061] The washed fiber does not need to be dried, and it is placed in an alkali-oxygen bath for cooking (bath ratio is selected as 1:10). The alkali-oxygen bath is composed of sodium hydroxide and hydrogen peroxide, wherein the mass concentration of ...

Embodiment 2

[0066] The processing method is as follows:

[0067] Cut the bast of kenaf into 10cm long pieces, immerse in ethylenediamine, the bath ratio is 1:10, seal it and place it in a shaking box, shake it at room temperature for 20 hours, take it out and freeze it in a freeze dryer Dry for 8 hours, and the temperature of cold hydrazine is -55°C.

[0068] Freeze-dried kenaf raw materials do not need to be washed, directly put into the steam flash explosion device, heat to make the water vapor pressure 1.0MPa, keep this pressure for 5 minutes, then open the valve, quickly release the pressure, and collect the spray from the steam flash explosion equipment. The kenaf fibers are extracted, and then the collected fibers are washed three times with water.

[0069] The washed fiber does not need to be dried, and it is placed in an alkali-oxygen bath for cooking (bath ratio is selected as 1:10). The alkali-oxygen bath is composed of sodium hydroxide and hydrogen peroxide, wherein the mass c...

Embodiment 3

[0075] The processing method is as follows:

[0076] Cut the bast of kenaf into 10cm long pieces, immerse in ethylenediamine, the bath ratio is 1:10, seal it and place it in a shaking box, shake it at room temperature for 20 hours, take it out and freeze it in a freeze dryer Dry for 8 hours, and the temperature of cold hydrazine is -70°C.

[0077] Freeze-dried kenaf raw materials do not need to be washed, directly put into the steam flash explosion device, heat to make the water vapor pressure 1.5MPa, keep this pressure for 5 minutes, then open the valve, quickly release the pressure, and collect the spray from the steam flash explosion equipment. The kenaf fibers are extracted, and then the collected fibers are washed three times with water.

[0078] The washed fiber does not need to be dried, and it is placed in an alkali-oxygen bath for cooking. The bath ratio is 1:10. The composition of the alkali-oxygen bath is sodium hydroxide and hydrogen peroxide, wherein the mass con...

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Abstract

The invention discloses a refined processing method of red ramie fibers. The refined processing method comprises an infiltration and activation, and freezing and drying pre-treatment step of red ramie barks, a flash-explosion and degumming step, a steaming step and a post-treatment step; in an organic amine type solvent, the red ramie barks are infiltrated and activated and then are subjected to freeze drying and drying; a series of technical measures including flash-explosion and degumming treatment under a relatively low temperature and steam air pressure and the like are organically combined so that the degumming effect of red ramie raw materials is good and obtained red ramie fiber finished products have fine fineness, good fiber strength index, long average length of the fibers, good quality and good spinnability; in a production process, the consumption amount of chemicals is small, and environment protection pressure is alleviated; the control difficulty of the process is greatly reduced; the consumption amount of public works including water, electricity, gas and the like is small; process time needed by a whole red ramie fiber treatment process is greatly shortened; and the production efficiency is improved and the production cost is reduced.

Description

technical field [0001] The invention relates to a processing method of hemp fiber, in particular to a refined processing method of kenaf fiber. Background technique [0002] Kenaf is a fast-growing renewable resource with a short growth period (120-160 days), high biological yield, large growth, wide adaptability, and simple management. It does not compete with grain, cotton, oil, and vegetables for land. The resources in the world are very rich. [0003] Kenaf fiber is an ecological textile fiber. Like ramie, flax and other fibers, it has excellent moisture absorption and release and air permeability, and has a unique style, so it has very important application and development value. But for a long time, kenaf fiber can only be used to process low-grade products such as sacks, burlap, and hemp rope, and this advantageous resource has not been fully developed and utilized. The reason is found that the single fiber of kenaf is short and thick, and the lignin content in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/02
CPCD01C1/02
Inventor 潘颖韩光亭张元明刘长军马君志王乐君
Owner QINGDAO UNIV
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