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A kind of refined processing method of hemp fiber

A technology of hemp fiber and processing method, which is applied in the field of hemp fiber processing, can solve the problem that the relationship between fiber strength, length and fineness is difficult to be reasonably controlled, the quality and added value of hemp products are of little significance, and there is no solution to the problem of hemp fiber Refinement issues and other issues, to achieve the effect of fine fineness, good degumming effect, and reduced environmental pressure

Active Publication Date: 2018-09-18
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steam flash explosion treatment used in relevant research has high temperature and high pressure; in particular, it often requires multiple repeated flash explosion treatments, which will inevitably cause damage to the strength of the hemp fiber and loss of fiber length
[0009] In short, in the prior art, when relying on a single chemical, biological or physical action for degumming without pretreatment of the hemp raw material, the processing conditions are difficult to control, and the relationship between fiber strength, length and fineness It is difficult to control reasonably and seriously affects the quality of cannabis products
[0010] In order to improve the performance of hemp fiber and promote its effective utilization, some work has been carried out on the fine technology of hemp fiber on the basis of traditional degumming methods at home and abroad, but most of them focus on the softening of hemp fiber and the soft treatment of products, without solving the problem of hemp fiber The refinement problem itself obviously has little significance for the improvement of the quality and added value of cannabis products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Origin of raw material of hemp bast: Yunnan

[0081] The processing method is as follows:

[0082] Put the hemp bast in a steaming ball, a cooking pot or a cooking tank, immerse in the cooking liquid, heat to a boiling state, and cook for 0.5 hour to remove impurities from the hemp bast.

[0083] Put the hemp raw material after cooking and removing impurities directly into the steam flash explosion device, heat it so that the water vapor pressure in the steam flash explosion device is 1.0 MPa, and keep this pressure for 1 minute; then open the valve to release the pressure quickly.

[0084] Collect the hemp fibers ejected from the steam flash explosion equipment, and then make cakes, put the hemp bast and hemp cages obtained from the cakes into the degumming tank, and pump FeSO with a mass percentage concentration of 0.05% 4 solution, until the hemp bast was submerged, at room temperature, the FeSO 4 Circulate the solution internally and externally for 15 minutes to e...

Embodiment 2

[0093] Origin of raw material of hemp bast: Yunnan

[0094] The processing method is as follows:

[0095] Put the hemp bast in a steaming ball, a cooking pot or a cooking tank, immerse in the cooking liquid, heat to a boiling state, and cook for 0.5 hour to remove impurities from the hemp bast.

[0096] Put the hemp raw material after cooking and removing impurities directly into the steam flash explosion device, heat it so that the water vapor pressure in the steam flash explosion device is 1.5 MPa, and keep this pressure for 5 minutes; then open the valve to release the pressure quickly.

[0097] Collect the hemp fibers ejected from the steam flash explosion equipment, and then make cakes, place the hemp bast and hemp cages in the degumming tank together, and pump FeCl with a mass percentage concentration of 0.1% 2 solution, until the hemp bast was covered, at room temperature, the FeCl 2 Circulate the solution internally and externally for 30 minutes to empty the FeCl 2 ...

Embodiment 3

[0106] Origin of raw material of hemp bast: Yunnan

[0107] Processing method: In addition to FeSO 4 The mass percent concentration of the solution is 1%, the continuous cooking time of the alkaline degumming solution is 2 hours, the urea peroxide solution is used instead of hydrogen peroxide, and the mass percent concentration of the urea peroxide solution is 1.5%;

[0108] All the other are the same as in Example 1.

[0109] Product inspection test results:

[0110] The prepared hemp fiber has a residual glue rate of 3.15%, an average fiber length greater than 30mm, a fiber strength of 3.02cN / dtex and a fiber fineness of 2.9dtex.

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Abstract

The invention discloses a refined processing method of hemp fiber. The refined processing method comprises following steps: cooking and impurity removing of hemp bast; steam flash explosion activation; cake making and cage packaging; orientation catalytic oxidation; chemical degumming; and postprocessing; after steam flash explosion activation, a ferrous salt solution and an activating agent are used for orientation catalytic oxidation of lignin, pectin, and hemicelluloses; organic combination of a series of technology including steam flash explosion activation and orientation catalytic oxidation is realized, so that the refined processing method of hemp fiber is excellent in degumming effect, factors of obtained hemp fiber finished products, including fineness, length, and strength, are excellent, quality is excellent, and spinnability is excellent. In processing process, chemical consumption amount is small, environment protection pressure is low, technical control is simple, public work consumption amount such as water, electricity, and gas is low, efficiency is high, and the refined processing method is suitable for industrialized production, and is promising in market popularization prospect.

Description

technical field [0001] The invention relates to a processing method of hemp fiber, in particular to a refined processing method of hemp fiber. Background technique [0002] Hemp, also known as thread hemp, cold hemp, hemp, etc., has more than ten aliases, and is known as the "king of natural fibers". According to historical records, hemp originated in China, and the clothing and accessories made of it have many functions such as moisture absorption, breathability, comfort, heat dissipation, mildew resistance, bacteriostasis, radiation resistance, ultraviolet protection, sound absorption, etc., and can be used for both military and civilian purposes. . In terms of the effect of making antibacterial socks, it has been widely praised. Hemp is the earliest natural fiber used by humans for fabrics. It has the reputation of "the source of national textiles and the ancestor of thousands of years of clothing". Its cultivation history has been at least 8,000 years. [0003] Since ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/02
CPCD01C1/02
Inventor 张元明韩光亭徐颖李明华宋焱
Owner QINGDAO UNIV
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