Preparation method of short natural bamboo fibers

Abstract

The invention discloses a preparation method of short natural bamboo fibers, pertaining to the technical field of production of plant fibers. The method comprises the following steps: slicing bamboo material, performing softening treatment, performing tearing operation, performing enzyme treatment, performing chemical treatment, performing operation with a disc mill, pre-dewatering the fibers, anddrying fibers. In order to resolve problems of an existing preparation method such as poor yield rate, heavy pollution and high cost, a spiral extruding and tearing machine replaces a conventional multi-roller grinding method. By putting biological treatment prior to chemical treatment, types of chemicals and biological enzyme are reduced. The disc mill and impinging stream drying operation replace steam drying, fiber splitting and multi-stage carding. The preparation method of short natural bamboo fibers has the following beneficial effects: high yield rate of short natural bamboo fibers, low cost and little pollution of a preparation process.

Description

technical field

[0001] The invention relates to a preparation method of bamboo raw fibers, in particular to a preparation method of short bamboo raw fibers, and belongs to the technical field of plant fiber production. Background technique

[0002] my country is rich in bamboo resources, with a large area, many types and wide distribution. According to different processing techniques, bamboo fiber can be divided into regenerated bamboo fiber (viscose fiber) and natural bamboo fiber (also known as bamboo fiber). The regenerated bamboo fiber is obtained by dissolving bamboo pulp through severe chemical treatment of bamboo, removing lignin, hemicellulose, pectin and other non-cellulose components in bamboo as much as possible, and further using alkaline carbon disulfide to dissolve bamboo dissolving pulp, Spinning and other treatments, the viscose fiber finally obtained, the original properties of the bamboo have been changed. Bamboo raw fiber usually adopts mechanical and ph...

Examples

Embodiment 1

[0030] The preparation method of short bamboo raw fiber, comprises the steps:

[0031] Step 1, slicing: slicing the bamboo from which green bamboo, bamboo knots and yellow bamboo have been removed, the length of the bamboo slices is 3-5 cm, and the thickness is 2-3 mm.

[0032] Step 2, softening treatment of bamboo slices: place the bamboo slices in a cooking pot at 100° C. and a pressure of 2 MPa for hot water pretreatment for 45 minutes. The ratio of wood chips to water is 1 kg of wood chips corresponds to 3 liters of water.

[0033] Step 3, bamboo chip tearing treatment: the softened bamboo chip is subjected to mechanical tearing treatment with an extrusion tearing machine with a compression ratio of 4 to obtain bulky bamboo fiber bundles.

[0034] Step 4. Enzyme treatment: place the bulky bamboo fiber bundles in a mixture of laccase and alkaline pectinase at a temperature of 55°C and pH 7.5 for 90 minutes. The amount of laccase is 15IU / kg dry fiber, alkali The dosage of ...

Embodiment 2

[0040] The preparation method of short bamboo raw fiber, comprises the steps:

[0041] Step 1, slicing: slicing the bamboo from which green bamboo, bamboo knots and yellow bamboo have been removed, the length of the bamboo slices is 3-5 cm, and the thickness is 2-3 mm.

[0042] Step 2, softening treatment of bamboo slices: place the bamboo slices in a cooking pot with a high temperature of 130° C. and a pressure of 2.5 MPa for hot water pretreatment for 60 minutes. The ratio of wood chips to water is 1 kg of wood chips corresponds to 3 liters of water.

[0043] Step 3, bamboo chip tearing treatment: the softened bamboo chip is subjected to mechanical tearing treatment with a screw extrusion tearing machine with a compression ratio of 4 to obtain bulky bamboo fiber bundles.

[0044]Step 4. Enzyme treatment: place the bulky bamboo fiber bundles in a mixed solution of laccase and alkaline pectinase at a temperature of 60°C and pH 8 for 60 minutes. The dosage of laccase is 30IU / k...

Embodiment 3

[0050] The preparation method of short bamboo raw fiber, comprises the steps:

[0051] Step 1, slicing: slicing the bamboo from which green bamboo, bamboo knots and yellow bamboo have been removed, the length of the bamboo slices is 3-5 cm, and the thickness is 2-3 mm.

[0052] Step 2, softening treatment of bamboo slices: place the bamboo slices in a cooking pot with a high temperature of 120° C. and a pressure of 3 MPa for hot water pretreatment for 75 minutes. The ratio of wood chips to water is 1 kg of wood chips corresponds to 3 liters of water.

[0053] Step 3, bamboo chip tearing treatment: the softened bamboo chip is subjected to mechanical tearing treatment with a screw extrusion tearing machine with a compression ratio of 4 to obtain bulky bamboo fiber bundles.

[0054] Step 4. Enzyme treatment: place the bulky bamboo fiber bundles in a mixed solution of laccase and alkaline pectinase at a temperature of 50°C and pH 7.0 for 120 minutes. The amount of laccase is 10IU...

technical field

[0001] The invention relates to a preparation method of bamboo raw fibers, in particular to a preparation method of short bamboo raw fibers, and belongs to the technical field of plant fiber production. Background technique

[0002] my country is rich in bamboo resources, with a large area, many types and wide distribution. According to different processing techniques, bamboo fiber can be divided into regenerated bamboo fiber (viscose fiber) and natural bamboo fiber (also known as bamboo fiber). The regenerated bamboo fiber is obtained by dissolving bamboo pulp through severe chemical treatment of bamboo, removing lignin, hemicellulose, pectin and other non-cellulose components in bamboo as much as possible, and further using alkaline carbon disulfide to dissolve bamboo dissolving pulp, Spinning and other treatments, the viscose fiber finally obtained, the original properties of the bamboo have been changed. Bamboo raw fiber usually adopts mechanical and ph...

Examples

Embodiment 1

[0030] The preparation method of short bamboo raw fiber, comprises the steps:

[0031] Step 1, slicing: slicing the bamboo from which green bamboo, bamboo knots and yellow bamboo have been removed, the length of the bamboo slices is 3-5 cm, and the thickness is 2-3 mm.

[0032] Step 2, softening treatment of bamboo slices: place the bamboo slices in a cooking pot at 100° C. and a pressure of 2 MPa for hot water pretreatment for 45 minutes. The ratio of wood chips to water is 1 kg of wood chips corresponds to 3 liters of water.

[0033] Step 3, bamboo chip tearing treatment: the softened bamboo chip is subjected to mechanical tearing treatment with an extrusion tearing machine with a compression ratio of 4 to obtain bulky bamboo fiber bundles.

[0034] Step 4. Enzyme treatment: place the bulky bamboo fiber bundles in a mixture of laccase and alkaline pectinase at a temperature of 55°C and pH 7.5 for 90 minutes. The amount of laccase is 15IU / kg dry fiber, alkali The dosage of ...

Embodiment 2

[0040] The preparation method of short bamboo raw fiber, comprises the steps:

[0041] Step 1, slicing: slicing the bamboo from which green bamboo, bamboo knots and yellow bamboo have been removed, the length of the bamboo slices is 3-5 cm, and the thickness is 2-3 mm.

[0042] Step 2, softening treatment of bamboo slices: place the bamboo slices in a cooking pot with a high temperature of 130° C. and a pressure of 2.5 MPa for hot water pretreatment for 60 minutes. The ratio of wood chips to water is 1 kg of wood chips corresponds to 3 liters of water.

[0043] Step 3, bamboo chip tearing treatment: the softened bamboo chip is subjected to mechanical tearing treatment with a screw extrusion tearing machine with a compression ratio of 4 to obtain bulky bamboo fiber bundles.

[0044]Step 4. Enzyme treatment: place the bulky bamboo fiber bundles in a mixed solution of laccase and alkaline pectinase at a temperature of 60°C and pH 8 for 60 minutes. The dosage of laccase is 30IU / k...

Embodiment 3

[0050] The preparation method of short bamboo raw fiber, comprises the steps:

[0051] Step 1, slicing: slicing the bamboo from which green bamboo, bamboo knots and yellow bamboo have been removed, the length of the bamboo slices is 3-5 cm, and the thickness is 2-3 mm.

[0052] Step 2, softening treatment of bamboo slices: place the bamboo slices in a cooking pot with a high temperature of 120° C. and a pressure of 3 MPa for hot water pretreatment for 75 minutes. The ratio of wood chips to water is 1 kg of wood chips corresponds to 3 liters of water.

[0053] Step 3, bamboo chip tearing treatment: the softened bamboo chip is subjected to mechanical tearing treatment with a screw extrusion tearing machine with a compression ratio of 4 to obtain bulky bamboo fiber bundles.

[0054] Step 4. Enzyme treatment: place the bulky bamboo fiber bundles in a mixed solution of laccase and alkaline pectinase at a temperature of 50°C and pH 7.0 for 120 minutes. The amount of laccase is 10IU...