CN105256385A - Hemp fiber degumming method - Google Patents

Abstract

The invention provides a hemp fiber degumming method. The hemp fiber degumming method includes the steps that raw hemp is placed in water to be immersed for 3.5 h at normal temperature; a proper amount of water is placed in a steamer, the immersed raw hemp is placed after the water is heated to 85-100 DEG C, pre-degumming liquid medicine is added when the water temperature is 150 DEG C, steaming continues to be conducted for 40 min, steaming is conducted to reduce the water temperature to 90 DEG C, and the raw hemp is taken out to be placed in cold water to be immersed for 1.5-2.5 h; after the water in the steamer is heated to 75-85 DEG C, the raw hemp obtained after primary steaming is placed, post-degumming liquid medicine is added when the water temperature is 130 DEG C, steaming continues to be conducted for 40 min, the water temperature is reduced to 90 DEG C after steaming is finished, the raw hemp is taken out, and then hemp fibers are obtained. According to the method, the steaming process is short in time, the fibers are complete and cannot be damaged, pectin is completely removed, spinning is not needed, and the fibers can be directly woven; as the integrality of the fibers is reserved, the performance is better than that of damaged hemp fibers, the whole process time is greatly shortened, and production efficiency is greatly improved.

Description

A kind of degumming method of bast fiber

Technical field

The present invention relates to and relate to flax fibre production technical field, particularly relate to a kind of degumming method of bast fiber.

Background technology

Fiber crops are the fibers obtained from various fibre of flax for textile material, comprise the bast fiber of annual or perennial herb dicotyledon cortex and monocotyledonous leaf fibre.Fiber crops mainly contain ramie, jute, piemarker, Chinese fiber crops, hemp, flax, bluish dogbane and gombo hemp etc.Be particularly suitable for that beriberi, pin are smelly, body odour personage uses flax fibre fabric, the advantage that flax fibre has other fibers to hardly match: there is good moisture absorption and fall apart wet with ventilative function, the features such as heat transfer heat conduction is fast, nice and cool well-pressed, perspire not next to the skin, quality light, powerful large, Vermins-proof mildew-proof, electrostatic are few, fabric not easily pollutes, the excretion of soft generous, rough, the suitable human body skin of tone and secretion.Show after deliberation, in numerous textile fabrics, flax fibre is the natural fabric of most potential function.

The method of current acquisition flax fibre has retted fibre, chemical treatment two kinds of methods, wherein the fibre separation index of retted fibre is minimum, process time is long, chemically treated fibre separation index is maximum, but it is also larger to the damage of linen fibre, and two kinds of methods are in scouring processes, come unstuck complete not, excessive damage of coming unstuck flax fibre, overall flax fibre can be destroyed in process, form short fiber, the performance that so not only have impact on flax fibre too increases the program of technique, makes processing cost also significantly increase.

Summary of the invention

The object of this invention is to provide a kind of degumming method of bast fiber, its fiber is complete, can not be destroyed, and pectin is removed completely, without the need to spinning, can directly weave, and the manufacture being applicable to high-grade gunny products uses.

In order to solve the problem existing for background technology, by the following technical solutions, it comprises the following steps the inventive method:

Step one: soak: raw ramie is put into water and carry out soak at room temperature, the time is three and a half hours;

Step 2: come unstuck in advance:

1, get out steamer, in steamer, put into appropriate water;

2, etc. the raw ramie after immersion is put into when water burns 85 DEG C-100 DEG C in steamer, then add when the water temperature of 150 DEG C the liquid medicine that comes unstuck, the described liquid medicine that comes unstuck is made up of ethanol, water, sulfuric acid, wherein the volume fraction of ethanol is 60-98%, the concentration of sulfuric acid is 0.4-0.8g/L, and continue boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out raw ramie and put into cold water soak 1.5-2.5 hour;

Step 3: after come unstuck:

1, again water temperature in steamer is burnt after 75 DEG C-85 DEG C, put into the raw ramie after once boiling, then come unstuck after adding when the water temperature of 130 DEG C liquid medicine, come unstuck after described and to be made up of ethanol, water, NaOH, wherein the volume fraction of ethanol is 60-98%, and the concentration of NaOH is 2-4g/L, and continues boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out and namely become flax fibre.

The china-hemp fibers that the inventive method is produced, the digestion process time is short, therefore fiber is complete, can not be destroyed, and pectin is removed completely, without the need to spinning, can directly weave, because it has possessed the globality of fiber, the flax fibre after its Performance Ratio destroys is better, the whole process time shortens greatly, substantially increases production efficiency.

Detailed description of the invention:

The inventive method concrete steps are as follows:

Embodiment 1: the present embodiment carries out as follows:

Step one: soak: raw ramie is put into water and carry out soak at room temperature, the time is three and a half hours;

Step 2: come unstuck in advance:

1, get out steamer, in steamer, put into appropriate water;

2, etc. the raw ramie after immersion is put into when water burns 85 DEG C in steamer, then the liquid medicine that comes unstuck in advance is added when the water temperature of 150 DEG C, the described liquid medicine that comes unstuck in advance is made up of ethanol, water, sulfuric acid, wherein the volume fraction of ethanol is 60%, the concentration of sulfuric acid is 0.8g/L, and continue boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out raw ramie and put into cold water soak 1.5 hours;

Step 3: after come unstuck:

1, again water temperature in steamer is burnt after 85 DEG C, put into the raw ramie after once boiling, then come unstuck after adding when the water temperature of 130 DEG C liquid medicine, come unstuck after described and to be made up of ethanol, water, NaOH, wherein the volume fraction of ethanol is 60%, and the concentration of NaOH is 4g/L, and continues boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out and namely become flax fibre.

Embodiment 2: the present embodiment carries out as follows:

Step one: soak: raw ramie is put into water and carry out soak at room temperature, the time is three and a half hours;

Step 2: come unstuck in advance:

1, get out steamer, in steamer, put into appropriate water;

2, etc. the raw ramie after immersion is put into when water burns 100 DEG C in steamer, then the liquid medicine that comes unstuck in advance is added when the water temperature of 150 DEG C, the described liquid medicine that comes unstuck in advance is made up of ethanol, water, sulfuric acid, wherein the volume fraction of ethanol is 75%, the concentration of sulfuric acid is 0.6g/L, and continue boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out raw ramie and put into cold water soak 2.5 hours;

Step 3: after come unstuck:

1, again water temperature in steamer is burnt after 75 DEG C, put into the raw ramie after once boiling, then come unstuck after adding when the water temperature of 130 DEG C liquid medicine, come unstuck after described and to be made up of ethanol, water, NaOH, wherein the volume fraction of ethanol is 98%, and the concentration of NaOH is 2g/L, and continues boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out and namely become flax fibre.

Embodiment 3: the present embodiment carries out as follows:

Step one: soak: raw ramie is put into water and carry out soak at room temperature, the time is three and a half hours;

Step 2: come unstuck in advance:

1, get out steamer, in steamer, put into appropriate water;

2, etc. the raw ramie after immersion is put into when water burns 90 DEG C in steamer, then the liquid medicine that comes unstuck in advance is added when the water temperature of 150 DEG C, the described liquid medicine that comes unstuck in advance is made up of ethanol, water, sulfuric acid, wherein the volume fraction of ethanol is 98%, the concentration of sulfuric acid is 0.4g/L, and continue boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out raw ramie and put into cold water soak 2 hours;

Step 3: after come unstuck:

1, again water temperature in steamer is burnt after 80 DEG C, put into the raw ramie after once boiling, then come unstuck after adding when the water temperature of 130 DEG C liquid medicine, come unstuck after described and to be made up of ethanol, water, NaOH, wherein the volume fraction of ethanol is 70%, and the concentration of NaOH is 2.5g/L, and continues boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out and namely become flax fibre.

Claims (1)

1. a degumming method of bast fiber, it comprises the following steps:

Step one: soak: raw ramie is put into water and carry out soak at room temperature, the time is three and a half hours;

Step 2: come unstuck in advance:

1, get out steamer, in steamer, put into appropriate water;

2, etc. the raw ramie after immersion is put into when water burns 85 DEG C-100 DEG C in steamer, then the liquid medicine that comes unstuck in advance is added when the water temperature of 150 DEG C, the described liquid medicine that comes unstuck in advance is made up of ethanol, water, sulfuric acid, wherein the volume fraction of ethanol is 60-98%, the concentration of sulfuric acid is 0.4-0.8g/L, and continue boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out raw ramie and put into cold water soak 1.5-2.5 hour;

Step 3: after come unstuck:

1, again water temperature in steamer is burnt after 75 DEG C-85 DEG C, put into the raw ramie after once boiling, then come unstuck after adding when the water temperature of 130 DEG C liquid medicine, come unstuck after described and to be made up of ethanol, water, NaOH, wherein the volume fraction of ethanol is 60-98%, and the concentration of NaOH is 2-4g/L, and continues boiling 40 minutes, after boiling, water temperature is down to 90 DEG C, takes out and namely become flax fibre.