CN1629366A - Banana bast fiber, process for making same and use thereof - Google Patents

Banana bast fiber, process for making same and use thereof Download PDF

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Publication number
CN1629366A
CN1629366A CN 200310109552 CN200310109552A CN1629366A CN 1629366 A CN1629366 A CN 1629366A CN 200310109552 CN200310109552 CN 200310109552 CN 200310109552 A CN200310109552 A CN 200310109552A CN 1629366 A CN1629366 A CN 1629366A
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weight
concentration
grams per
aqueous solution
weight portion
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CN1317434C (en
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吴雄英
王府梅
崔运花
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Donghua University
Shanghai Entry Exit Inspection and Quarantine Bureau of PRC
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Donghua University
Shanghai Entry Exit Inspection and Quarantine Bureau of PRC
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Abstract

The invention relates to a banana bast fiber, its making process and use, wherein the banana bast fiber comprises cellulose 65-80 wt%, hemicellulose 10-15 wt%, lignin 3-12 wt%, pectin 1-3 wt%, water soluble substance 2-5 wt%. The making process consists of preliminary treatment by acids, alkali boiling, stewing, bleaching and pickling.

Description

Banana bast fiber and manufacture method thereof and purposes
Technical field
The present invention relates to a kind of banana bast fiber and manufacture method thereof and purposes.
Background technology
Banana bast fiber refers to the bast fiber of banana plant cane.
The planting process of fancy fruit banana is accompanied by the generation of a large amount of plant stems, and banana stalk is the rubbish of fruit-growing industry always.Because fiber content height in the bast of banana plant cane is usually dumped at the field and is difficult to natural degradation in the short time, becomes the pollution sources of environment.If by burn destroying the banana stalk that goes out of use, the lighter's contaminated air is heavy then cause fire.
The bast of banana plant cane is different from the bast of plants such as ramie, jute, flax, adopts common physics Degumming method can not separate fiber with practical value, so the banana bast is not so far by the human use.
Summary of the invention
The purpose of this invention is to provide a kind of agricultural waste that utilizes---the bast of banana stalk is produced the method for fiber.This method is utilized the banana stalk as refuse, has both efficiently solved banana planting ground problem of environmental pollution, can provide cheap and good-quality natural fabric for society again.
Another object of the present invention provides a kind of well behaved natural banana bast fiber that is made by the inventive method.
A further object of the present invention provides a kind of purposes of banana bast fiber of the present invention.
A first aspect of the present invention relates to a kind of method for preparing banana bast fiber, and it in turn includes the following steps:
(1) pre-acid treatment: with concentration is the bast of the aqueous sulfuric acid processing banana stalk of 0.1-0.4 weight %, and the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 30-1: 50, and treatment temperature 20-50 ℃, processing time 1-2 hour;
(2) soda boiling: the mixed aqueous solution that adds NaOH, sodium sulfite and sodium pyrophosphate, boil and boil 1-3 hour, the concentration of sodium hydroxide solution is the 1-10 grams per liter in this mixed solution, the concentration of sodium sulfite and sodium pyrophosphate respectively is the 0.5-1 grams per liter, and the weight ratio of this mixed liquor and banana stalk bast raw material is 1: 30-1: 50;
(3) stewing boiling: the mixed aqueous solution that adds NaOH and industrial soap, to adopt 90-98 ℃ of temperature to boil in a covered pot over a slow fire through the material that the soda boiling step has been boiled boils 1-3 hour, concentration sodium hydroxide is the 0.5-2 grams per liter in this mixed aqueous solution, the concentration of industrial soap is the 0.5-1.5 grams per liter, and the weight ratio of this mixed aqueous solution and banana stalk bast raw material is 1: 10-1: 30;
(4) bleaching: adding concentration is the aqueous sodium hypochlorite solution of 2-5 weight %, bleaches 5-12 minute, and the weight ratio of aqueous sodium hypochlorite solution and banana stalk bast raw material is 1: 10-1: 25, and treatment temperature 5-25 ℃;
(5) pickling: add concentration and be aqueous sulfuric acid pickling 5-10 minute of 0.1-0.2 weight %, the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 10-1: 25, and temperature 5-25 ℃.
In a specific embodiment of the inventive method, also comprise step (6): dewatered drying.
In another specific embodiment of the inventive method, the concentration of aqueous sulfuric acid is 0.1-0.2 weight % in the pre-acid treatment step, the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 40-1: 50, and treatment temperature 20-40 ℃, processing time 1-2 hour.
In another specific embodiment of the inventive method, in the soda boiling step, boil and boil 1-2 hour.
In another specific embodiment of the inventive method, in the soda boiling step, the concentration of sodium hydroxide solution is that the concentration of 1-5 grams per liter, sodium sulfite and sodium pyrophosphate is the 0.75-1 grams per liter respectively in the mixed aqueous solution, and the weight ratio of the raw material of this mixed aqueous solution and banana stalk bast is 1: 40-1: 50.
In another specific embodiment of the inventive method, boil in the step stewing boiling 1-2 hour stewing.
In another specific embodiment of the inventive method, boil in the step stewing, concentration sodium hydroxide is that the concentration of 1-2 grams per liter, industrial soap is the 0.5-1.0 grams per liter in the mixed aqueous solution of NaOH and industrial soap, and the weight ratio of this mixed aqueous solution and banana stalk bast raw material is 1: 10-1: 20.
A second aspect of the present invention relates to a kind of banana bast fiber, and it contains following composition:
Cellulose: 65-80 weight %;
Hemicellulose: 10-15 weight %;
Lignin: 3-12 weight %;
Pectin: 1-3 weight %;
The hydrotrope: 2-5 weight %;
Gross weight with banana bast fiber is a benchmark.
In a specific embodiment of banana bast fiber of the present invention, it contains following composition:
Cellulose: 70-80 weight %;
Hemicellulose: 10-12 weight %;
Lignin: 3-6 weight %;
Pectin: 1-2 weight %;
The hydrotrope: 2-3 weight %;
Gross weight with banana bast fiber is a benchmark.
A third aspect of the present invention relates to a kind of purposes of banana bast fiber of the present invention, and it is used to be spun into the pure of 10-40 yarn count (English props up) spins or blended yarn, is made into fabric.
Detailed description of the invention
The inventive method comprises pre-acid treatment, soda boiling, stewingly boils, bleaching and acid pickling step, also optional other steps that comprises, for example the dewatered drying step after the pickling etc.
Pre-acid-treated purpose mainly is to remove the vegetable protein and the hydrotrope contained in the banana stalk bast raw material.In the pre-acid treatment step of the inventive method, adopt aqueous sulfuric acid to handle.The concentration of aqueous sulfuric acid is big more or its consumption is many more (weight ratio that is itself and banana bast raw material is big more) or treatment temperature is high more or the processing time is long more, and is just favourable more to the vegetable protein and the hydrotrope that remove tough intracutaneous effectively.But the concentration of aqueous sulfuric acid is excessive or its consumption too much (weight ratio that is itself and banana bast raw material is excessive) or treatment temperature is too high or the processing time is long, to producing fiber adverse effect is arranged also, be that fiber can be damaged, fiber is lossy, causes yield rate low.
In pre-acid treatment step of the present invention, the following process conditions of suitable employing: the concentration of aqueous sulfuric acid is 0.1-0.4 weight %, the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 30-1: 50, and treatment temperature 20-50 ℃, processing time 1-2 hour.The preferred 0.1-0.2 weight of the concentration of aqueous sulfuric acid % wherein.The weight ratio of aqueous sulfuric acid and banana bast raw material is preferably 1: 40-1: 50, and more preferably 1: 45.The preferred 20-40 of treatment temperature ℃, more preferably 30 ℃.Preferred 1-1.75 of processing time hour, more preferably 1-1.5 hour.When the treatment temperature that adopts is low, correspondingly just need the long processing time.
The soda boiling step of the inventive method is important step for successfully preparing banana bast fiber of the present invention.The effect of soda boiling step is to remove contained colloid composition in the banana bast raw material.The mixed aqueous solution that this step adopts NaOH, sodium sulfite and sodium pyrophosphate boils to boil and comes unstuck.The effect of NaOH is exactly to remove colloid in the mixed liquor, and sodium sulfite and sodium pyrophosphate are softeners, makes the deliquescing of bast raw material, makes phloem tissue's dispersion that becomes, and is convenient to therefrom remove the colloid composition, simultaneously, makes the fiber of making soft.Concentration sodium hydroxide is high more or the mixed liquor consumption is big more, and (weight ratio that is mixed liquor and banana bast raw material is big more) or the time of boiling of boiling are long more, help removing colloid more.But concentration sodium hydroxide is too high or the mixed liquor consumption is excessive (weight ratio that is mixed liquor and banana bast raw material is excessive) or boil and boil overlong time, and bast fiber is also had adverse effect, be that fiber can be damaged, fiber is lossy, causes yield rate low, and feel is sent out dry.
In the soda boiling step of the inventive method, the following process conditions of suitable employing: the mixed aqueous solution that adds NaOH, sodium sulfite and sodium pyrophosphate, boil and boil 1-3 hour, the concentration of sodium hydroxide solution is the 1-10 grams per liter in this mixed solution, the concentration of sodium sulfite and sodium pyrophosphate respectively is the 0.5-1 grams per liter, and the weight ratio of this mixed liquor and banana stalk bast raw material is 1: 30-1: 50.Wherein boiled preferred 1-2 of the time of boiling hour, the concentration of sodium hydroxide solution is preferably the 1-5 grams per liter in the mixed solution, the concentration of sodium sulfite and sodium pyrophosphate preferably respectively is the 0.75-1 grams per liter, and the weight ratio of this mixed liquor and banana stalk bast raw material is preferably 1: 40-1: 50, and more preferably 1: 45.When adopting long boiling to boil the time, the stewing time of boiling of this step subsequent can lack a little.
The stewing step of boiling in the inventive method also is important step for successfully preparing banana bast fiber.Its effect is further to remove the colloid composition contained in the bast raw material and the residual hydrotrope.This step is the mixed aqueous solution that adds NaOH and industrial soap, will boil in a covered pot over a slow fire 90-98 ℃ of temperature through the material that the soda boiling step has been boiled and boil.Wherein the effect of NaOH remains and removes colloid in the mixed liquor, and industrial soap had both had the effect of coming unstuck, and has the softener effect again.Industrial soap can further soften material, and bast fiber is more disperseed, and is convenient to further therefrom remove the residue colloid and the residual hydrotrope, and the fiber softening that makes, and does not harden.The concentration of NaOH and industrial soap is high more or the mixed liquor consumption is big more (weight ratio that is mixed liquor and banana bast raw material is big more) or stewing to boil the time long more, helps removing the residue colloid and the residual hydrotrope more.But concentration sodium hydroxide is too high or the mixed liquor consumption is excessive (weight ratio that is mixed liquor and banana bast raw material is excessive) or stewing boil overlong time, and bast fiber is also had adverse effect, and promptly fiber can be damaged, and fiber is lossy, causes yield rate low.
Boil in the step the stewing of the inventive method, the following process conditions of suitable employing: the mixed aqueous solution that adds NaOH and industrial soap, to boil in a covered pot over a slow fire 90-98 ℃ of temperature through the material continuation that the soda boiling step has been boiled and boil 1-3 hour, concentration sodium hydroxide is the 0.5-2 grams per liter in this mixed aqueous solution, the concentration of industrial soap is the 0.5-1.5 grams per liter, and the weight ratio of this mixed aqueous solution and banana stalk bast raw material is 1: 10-1: 30.The wherein stewing time of boiling is preferably 1-2 hour, and concentration sodium hydroxide is preferably the 1-2 grams per liter, and the concentration of industrial soap is preferably the 0.5-1.0 grams per liter, and the weight ratio of mixed liquor and banana bast raw material is for being preferably 1: 10-1: 20, and more preferably 1: 15.
Blanching step of the present invention adopts aqueous sodium hypochlorite solution to carry out.The effect of this step bleaches the fiber that makes, and can not shade.This step is suitable to adopt following process conditions to carry out: adding concentration is the aqueous sodium hypochlorite solution of 2-5 weight %, bleaches 5-12 minute, and the weight ratio of aqueous sodium hypochlorite solution and banana stalk bast raw material is 1: 10-1: 25, and treatment temperature 5-25 ℃.The concentration of aqueous sodium hypochlorite solution is low excessively or bleaching time is too short or the weight ratio of aqueous sodium hypochlorite solution and banana stalk bast raw material is low excessively, the fiber color obfuscation that makes.Wherein the concentration of aqueous sodium hypochlorite solution is preferably 2-4 weight %, and bleaching time is preferably 5-10 minute, and the weight ratio of aqueous sodium hypochlorite solution and banana stalk bast raw material is preferably 1: 15-1: 20, and temperature is preferably 5-20 ℃.
The effect of the acid pickling step in the inventive method be in and material in alkali.This step is suitable to adopt following process conditions to carry out: add concentration and be aqueous sulfuric acid pickling 5-10 minute of 0.1-0.2 weight %, the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 10-1: 25, and temperature 5-25 ℃.Wherein the concentration of aqueous sulfuric acid is preferably 0.15-0.2 weight %, and the pickling time is preferably 8-10 minute, and the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is preferably 1: 10-1: 20, and temperature is preferably 5-20 ℃, and temperature is more preferably room temperature.
Method of the present invention can also comprise steps such as dehydration, oven dry.
Product after above-mentioned operation is handled continuously is exactly a banana bast fiber of the present invention.The outward appearance and the feel of banana bast fiber exactly like flax fibre.Its chemical composition sees Table 1, and mechanical performance sees Table 2.
The chemical composition (weight %) of table 1 banana bast process of fiber
Composition Cellulose Hemicellulose Lignin Pectin The hydrotrope
Content 65-80 ?10-15 ??3-12 ??1-3 ????2-5
The physical and mechanical properties of table 2 banana bast fiber
Project Length Fineness Intensity Percentage elongation Regain
Unit Centimetre Dtex cN/dtex ％ ??％
Indication range 5-35 1.0-8.0 0.77-1.0 4.0-5.0 ??8-9
The composition of banana bast fiber of the present invention is preferably: cellulose: 70-80 weight %; Hemicellulose: 10-12 weight %; Lignin: 3-6 weight %; Pectin: 1-2 weight %; The hydrotrope: 2-3 weight %.
Its physical and mechanical properties is preferably: length: 5-15cm, more preferably 5-10cm; Fineness: 3-6 dtex; Intensity: 0.77-0.98cN/dtex; Percentage elongation: 4.7-5%; Regain: 8-9%.
The outward appearance and the feel of banana bast fiber of the present invention exactly like flax fibre, and every mechanical performance is good.It can prescind, and for example is cut into 38mm length, is spun into yarn count then for the yarn that 10-40 English props up, and is made into fabric.It also can with other natural fabrics or chemical fibre blending, be made into BLENDED FABRIC.
Banana bast fiber of the present invention can also be used for many fields such as bast fibre spinning, wool spinning, nonwoven fabric, carpet, filler.
The banana bast manually strips on the air-dry banana stalk after the maturation, and 100 kilograms of tough micromicros of banana are produced 35-45 kilogram textile fiber, and promptly row yielding is 35-45%.The bast of banana plant stem bar is thick more, maturation is good more, and the row yielding of textile fabric is high more.
Hardware investment required for the present invention for conventional cement tub, hot plate simple machine such as pot, producing the value that 100 kilograms of textile fabrics need consume chemicals is 500-800 unit, water 16-20 ton, 80-85% sewage can recycle, the first kind pollutant (mercury, cadmium, chromium, arsenic etc.) of regulation among the GB 8978-1996 " integrated wastewater discharge standard " in the sewage that produces, the highest permission discharging of second pollutant degree pH value, five-day BOD (BOD5), COD (COD) etc. are through also reaching emission request after the uncomplicated sewage disposal.Therefore, the inventive method is simple and easy to do, and cost is low, and can not cause environmental pollution.
In addition, the inventive method is to utilize agricultural waste---the bast of banana stalk is as the feedstock production fiber, and the cost of its raw material is also very low.Simultaneously, this method has consumed and has been deposited in refuse-banana stalk that banana planting is located in, and has also solved its problem of environment pollution caused.
In addition, banana bast fiber of the present invention is a kind of natural fabric with environment-friendly type notion.Its function admirable is suitable with flax fibre.Therefore, it can substitute flax fibre and is used for every field.But because it is made by waste material, manufacturing cost is also low, and its cost is obviously much lower than flax fibre, because the cost of flax fibre comprises cost of planting numb plant and the cost that makes flax fibre from numb plant.
Embodiment
Embodiment 1
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 10 weight %; Lignin: 10 weight %; Pectin: 3 weight %; The hydrotrope: 2 weight %.
Embodiment 2
(1) pre-acid treatment: adding 30 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.4 weight %, handles 2 hours down for 20 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 30 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 3 hours.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 0.5 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 0.5 grams per liter, 90 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 25 weight portion concentration is the aqueous sodium hypochlorite solution of 2 weight %, 25 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 20 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 35%, and the chemical composition of the banana bast fiber that makes is: cellulose: 78 weight %; Hemicellulose: 10 weight %; Lignin: 8 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 3
(1) pre-acid treatment: adding 50 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.3 weight %, handles 1.25 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 30 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1.5 grams per liters, 98 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 20 weight portion concentration is the aqueous sodium hypochlorite solution of 3 weight %, 10 ℃ of temperature, rinsing 8 minutes;
(5) pickling: adding 15 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 43%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 10 weight %; Lignin: 9 weight %; Pectin: 3 weight %; The hydrotrope: 3 weight %.
Embodiment 4
(1) pre-acid treatment: adding 35 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 45 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 1 hour.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.75 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1.5 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1.5 grams per liters, 95 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 15 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 15 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 25 ℃ of temperature were washed 8 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 11 weight %; Lignin: 8% weight %; Pectin: 2 weight %; The hydrotrope: 4 weight %.
Embodiment 5
(1) pre-acid treatment: adding 45 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.75 hours down for 25 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 30 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.75 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 25 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 92 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 25 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 20 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 18 ℃ of temperature were washed 8 minutes.
Productive rate is 36%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 10 weight %; Lignin: 6 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 6
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.4 hours down for 35 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 8 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 25 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 25 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 5 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 20 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 15 ℃ of temperature were washed 10 minutes.
Productive rate is 38%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 13 weight %; Lignin: 3 weight %; Pectin: 1 weight %; The hydrotrope: 3 weight %.
Embodiment 7
(1) pre-acid treatment: adding 35 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.2 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 45 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 1 hour.Concentration sodium hydroxide is 3 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 15 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 25 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 25 ℃ of temperature, rinsing 5 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, temperature: 20 ℃, washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 70 weight %; Hemicellulose: 11 weight %; Lignin: 12 weight %; Pectin: 3 weight %; The hydrotrope: 4 weight %.
Embodiment 8
(1) pre-acid treatment: adding 45 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.1 hours down for 45 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 8 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 25 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 2 grams per liters, 95 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.2 weight %, and 10 ℃ of temperature were washed 5 minutes.
Productive rate is 44%, and the chemical composition of the banana bast fiber that makes is: cellulose: 78 weight %; Hemicellulose: 12 weight %; Lignin: 6 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 9
(1) pre-acid treatment: adding 50 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.3 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 35 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 0.75 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 3 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 3 weight %, 20 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 15 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 42%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 10 weight %; Lignin: 6 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 10
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.3 weight %, handles 1.2 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.75 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 8 ℃ of temperature were washed 10 minutes.
Productive rate is 42%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 10 weight %; Lignin: 7 weight %; Pectin: 1 weight %; The hydrotrope: 2 weight %.
Embodiment 11
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.3 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 7 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 15 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 20 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 15 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 44%, and the chemical composition of the banana bast fiber that makes is: cellulose: 78 weight %; Hemicellulose: 10 weight %: lignin: 7 weight %; Pectin: 3 weight %; The hydrotrope: 2 weight %.
Embodiment 12
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.4 weight %, handles 2 hours down for 20 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 48 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1.5 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 94 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 13 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 25 ℃ of temperature, rinsing 8 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 73% weight %; Hemicellulose: 10 weight %; Lignin: 12 weight %; Pectin: 2 weight %: the hydrotrope: 3 weight %.
Embodiment 13
(1) pre-acid treatment: adding 45 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.4 weight %, handles 1.9 hours down for 24 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 48 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 3 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 14 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 23 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 10 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 70 weight %; Hemicellulose: 10 weight %; Lignin: 12 weight %; Pectin: 3 weight %; The hydrotrope: 5 weight %.
Embodiment 14
(1) pre-acid treatment: adding 45 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.9 hours down for 28 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 30 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 3 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 15 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 43%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 10 weight %; Lignin: 5 weight %; Pectin: 2 weight %; The hydrotrope: 3 weight %.
Embodiment 15
(1) pre-acid treatment: adding 45 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 30 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 8 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 30 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1.5 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 93 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 12 weight %; Lignin: 6 weight %; Pectin: 1 weight %; The hydrotrope: 1 weight %.
Embodiment 16
(1) pre-acid treatment: adding 45 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 32 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 3 hours.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.2 weight %, and 20 ℃ of temperature were washed 10 minutes.
Productive rate is 35%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 15 weight %; Lignin: 3 weight %; Pectin: 1 weight %; The hydrotrope: 1 weight %.
Embodiment 17
(1) pre-acid treatment: adding 48 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.5 hours down for 35 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 9 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 2.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.2 weight %, and 20 ℃ of temperature were washed 8 minutes.
Productive rate is 43%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 10 weight %; Lignin: 5 weight %; Pectin: 2 weight %; The hydrotrope: 3 weight %.
Embodiment 18
(1) pre-acid treatment: adding 47 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.4 hours down for 38 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 6 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 25 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 15 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 10 weight %; Lignin: 10 weight %; Pectin: 2 weight %; The hydrotrope: 3 weight %.
Embodiment 19
(1) pre-acid treatment: adding 43 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.3 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 8 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.75 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 20 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 10 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 20 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 12 weight %; Lignin: 5 weight %; Pectin: 1 weight %; The hydrotrope: 2 weight %.
Embodiment 20
(1) pre-acid treatment: adding 49 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.2 hours down for 45 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 45 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 18 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1.5 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 90 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 15 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 10 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 10 weight %; Lignin: 9 weight %; Pectin: 3 weight %; The hydrotrope: 3 weight %.
Embodiment 21
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 45 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 15 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 15 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 13 weight %; Lignin: 4 weight %; Pectin: 2 weight %; The hydrotrope: 1 weight %.
Embodiment 22
(1) pre-acid treatment: adding 35 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 3 hours.Concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 30 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 5 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 65 weight %; Hemicellulose: 15 weight %; Lignin: 12 weight %; Pectin: 3 weight %; The hydrotrope: 5 weight %.
Embodiment 23
(1) pre-acid treatment: adding 35 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 30 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 18 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 6 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 68% weight %; Hemicellulose: 12 weight %; Lignin: 12 weight %; Pectin: 3 weight %; The hydrotrope: 5 weight %.
Embodiment 24
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 3 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1.5 grams per liters, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 19 ℃ of temperature were washed 5 minutes.
Productive rate is 44%, and the chemical composition of the banana bast fiber that makes is: cellulose: 70 weight %; Hemicellulose: 11 weight %; Lignin: 11 weight %; Pectin: 3 weight %; The hydrotrope: 5 weight %.
Embodiment 25
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.6 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 13 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 41%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 12 weight %; Lignin: 9 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 26
(1) pre-acid treatment: adding 50 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.7 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 96 ℃ of stewing boiling 2.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 12 weight %; Lignin: 9 weight %; Pectin: 3 weight %; The hydrotrope: 1 weight %.
Embodiment 27
(1) pre-acid treatment: adding 50 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 2 hours down for 21 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 8 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 2.3 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 20 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 12 weight %; Lignin: 4 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 28
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 7 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.75 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 15 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1.5 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 2.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 10 weight %; Lignin: 6 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 29
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.2 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 1.5 hours.Concentration sodium hydroxide is 4 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 10 ℃ of temperature were washed 5 minutes.
Productive rate is 43%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 11 weight %; Lignin: 8 weight %; Pectin: 3 weight %; The hydrotrope: 3 weight %.
Embodiment 30
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.3 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2.5 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 97 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 4 weight %, 18 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 11 weight %; Lignin: 6 weight %; Pectin: 2 weight %; The hydrotrope: 1 weight %.
Embodiment 31
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.3 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 8 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 3 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 20 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 38%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 14 weight %; Lignin: 4 weight %; Pectin: 1 weight %; The hydrotrope: 1 weight %.
Embodiment 32
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.4 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 1.5 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 1 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 4 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 42%, and the chemical composition of the banana bast fiber that makes is: cellulose: 76 weight %; Hemicellulose: 11 weight %; Lignin: 6 weight %; Pectin: 3 weight %; The hydrotrope: 4 weight %.
Embodiment 33
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.2 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2.5 hours.Concentration sodium hydroxide is 3 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 14 weight portion concentration is the aqueous sodium hypochlorite solution of 3 weight %, 20 ℃ of temperature, and rinsing 12 minutes:
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 7 ℃ of temperature were washed 8 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 72 weight %; Hemicellulose: 10 weight %; Lignin: 11 weight %; Pectin: 3 weight %; The hydrotrope: 4 weight %.
Embodiment 34
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 50 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 93 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 4 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 76 weight %; Hemicellulose: 11 weight %; Lignin: 8 weight %; Pectin: 2 weight %; The hydrotrope: 3 weight %.
Embodiment 35
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.8 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 16 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.2 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 44%, and the chemical composition of the banana bast fiber that makes is: cellulose: 79 weight %; Hemicellulose: 12 weight %; Lignin: 4 weight %; Pectin: 2 weight %; The hydrotrope: 3 weight %.
Embodiment 36
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 30 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 30 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2.5 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.9 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 25 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1.5 grams per liters, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 13 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 39%, and the chemical composition of the banana bast fiber that makes is: cellulose: 78 weight %; Hemicellulose: 11 weight %; Lignin: 6 weight %; Pectin: 2 weight %; The hydrotrope: 3 weight %.
Embodiment 37
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.2 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 30 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 1.5 hours.Concentration sodium hydroxide is 9 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.9 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 20 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 8 ℃ of temperature, rinsing 12 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 10 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 12 weight %; Lignin: 4 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 38
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.2 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 6 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.8 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 10 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 15 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 10 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 74 weight %; Hemicellulose: 12 weight %; Lignin: 8 weight %; Pectin: 3 weight %; The hydrotrope: 3 weight %.
Embodiment 39
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 35 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.7 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 15 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 40%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 12 weight %; Lignin: 7 weight %; Pectin: 3 weight %; The hydrotrope: 3 weight %.
Embodiment 40
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.5 hours down for 35 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.6 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 25 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 0.5 grams per liter, 95 ℃ of stewing boiling 2 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 44%, and the chemical composition of the banana bast fiber that makes is: cellulose: 76 weight %; Hemicellulose: 12 weight %; Lignin: 8 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 41
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.2 hours down for 40 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 10 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.6 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 1 grams per liter in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 95 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.2 weight %, and 20 ℃ of temperature were washed 10 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 80 weight %; Hemicellulose: 12 weight %; Lignin: 4 weight %; Pectin: 2 weight %; The hydrotrope: 2 weight %.
Embodiment 42
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1 hour down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 2 hours.Concentration sodium hydroxide is 5 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 20 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1 grams per liter, 98 ℃ of stewing boiling 1 hour.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 5 minutes.
Productive rate is 41%, and the chemical composition of the banana bast fiber that makes is: cellulose: 78 weight %; Hemicellulose: 12 weight %; Lignin: 5 weight %; Pectin: 3 weight %; The hydrotrope: 2 weight %.
Embodiment 43
(1) pre-acid treatment: adding 40 weight portion concentration in 1 weight portion banana bast raw material is the aqueous sulfuric acid of 0.1 weight %, handles 1.3 hours down for 50 ℃ in temperature.
(2) soda boiling: add the mixed aqueous solution of 40 weight portion NaOH, sodium sulfite and sodium pyrophosphate, and boil and boil 60 minutes.Concentration sodium hydroxide is 6 grams per liters in this mixed aqueous solution, and the concentration of sodium sulfite and sodium pyrophosphate respectively is 0.5 grams per liter.
(3) stewing boiling: add the mixed aqueous solution of 15 weight portion NaOH and industrial soap, concentration sodium hydroxide is 2 grams per liters in this mixed aqueous solution, and the concentration of industrial soap is 1.5 grams per liters, 98 ℃ of stewing boiling 1.5 hours.
(4) bleaching: adding 10 weight portion concentration is the aqueous sodium hypochlorite solution of 5 weight %, 20 ℃ of temperature, rinsing 10 minutes;
(5) pickling: adding 10 weight portion concentration is the aqueous sulfuric acid of 0.1 weight %, and 20 ℃ of temperature were washed 8 minutes.
Productive rate is 45%, and the chemical composition of the banana bast fiber that makes is: cellulose: 75 weight %; Hemicellulose: 12 weight %; Lignin: 8 weight %; Pectin: 3 weight %; The hydrotrope: 2 weight %.

Claims (10)

1. banana bast fiber, it contains following composition:
Cellulose: 65-80 weight %;
Hemicellulose: 10-15 weight %;
Lignin: 3-12 weight %;
Pectin: 1-3 weight %;
The hydrotrope: 2-5 weight %;
Dry weight with banana bast fiber is a benchmark.
2. banana bast fiber as claimed in claim 1, it contains following composition:
Cellulose: 70-80 weight %;
Hemicellulose: 10-12 weight %;
Lignin: 3-6 weight %;
Pectin: 1-2 weight %;
The hydrotrope: 2-3 weight %;
Dry weight with banana bast fiber is a benchmark.
3. method for preparing banana bast fiber as claimed in claim 1, it in turn includes the following steps:
(1) pre-acid treatment: with concentration is the bast of the aqueous sulfuric acid processing banana stalk of 0.1-0.4 weight %, and the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 30-1: 50, and treatment temperature 20-50 ℃, processing time 1-2 hour;
(2) soda boiling: the mixed aqueous solution that adds NaOH, sodium sulfite and sodium pyrophosphate, boil and boil 1-3 hour, the concentration of sodium hydroxide solution is the 1-10 grams per liter in this mixed solution, the concentration of sodium sulfite and sodium pyrophosphate respectively is the 0.5-1 grams per liter, and the weight ratio of this mixed liquor and banana stalk bast raw material is 1: 30-1: 50;
(3) stewing boiling: the mixed aqueous solution that adds NaOH and industrial soap, to boil in a covered pot over a slow fire 90-98 ℃ of temperature through the material that the soda boiling step has been boiled and boil 1-3 hour, concentration sodium hydroxide is the 0.5-2 grams per liter in this mixed aqueous solution, the concentration of industrial soap is the 0.5-1.5 grams per liter, and the weight ratio of this mixed aqueous solution and banana stalk bast raw material is 1: 10-1: 30;
(4) bleaching: adding concentration is the aqueous sodium hypochlorite solution of 2-5 weight %, bleaches 5-12 minute, and the weight ratio of aqueous sodium hypochlorite solution and banana stalk bast raw material is 1: 10-1: 25, and treatment temperature 5-25 ℃;
(5) pickling: add concentration and be aqueous sulfuric acid pickling 5-10 minute of 0.1-0.2 weight %, the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 10-1: 25, and temperature 5-25 ℃.
4. method as claimed in claim 3, it also comprises step (6): dewatered drying.
5. method as claimed in claim 3, the concentration of aqueous sulfuric acid is 0.1-0.2 weight % in the wherein said pre-acid treatment step, the weight ratio of aqueous sulfuric acid and banana stalk bast raw material is 1: 40-1: 50, treatment temperature 20-40 ℃.
6. method as claimed in claim 3 in the wherein said soda boiling step, is boiled and is boiled 1-2 hour.
7. method as claimed in claim 3, wherein in described soda boiling step, the concentration of sodium hydroxide solution is that the concentration of 1-5 grams per liter, sodium sulfite and sodium pyrophosphate is the 0.75-1 grams per liter respectively in the mixed aqueous solution, and the weight ratio of this mixed aqueous solution and banana stalk bast raw material is 1: 40-1: 50.
8. method as claimed in claim 3 is wherein described stewing boiling in the step, stewing boiling 1-2 hour.
9. method as claimed in claim 3, wherein described stewing boiling in the step, concentration sodium hydroxide is that the concentration of 1-2 grams per liter, industrial soap is the 0.5-1.0 grams per liter in the mixed aqueous solution of NaOH and industrial soap, and the weight ratio of this mixed aqueous solution and banana stalk bast raw material is 1: 10-1: 20.
10. the purposes of a banana bast fiber as claimed in claim 1, it is used to be spun into the yarn that 10-40 English props up.
CNB2003101095528A 2003-12-19 2003-12-19 Banana bast fiber, process for making same and use thereof Expired - Fee Related CN1317434C (en)

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CN101897839A (en) * 2010-07-20 2010-12-01 郑文武 Comprehensive utilization method of banana stalks
CN101974818A (en) * 2010-09-26 2011-02-16 郭建南 Banana plant fabric and preparation method thereof
CN101982571A (en) * 2010-09-10 2011-03-02 中国科学院过程工程研究所 Preparation method of banana fiber from banana stems and leaves by steam explosion degumming
CN101768802B (en) * 2010-01-01 2011-07-27 沅江市明星麻业有限公司 Blended yarn by short spinning of banana phloem fiber and ramie and production method thereof
CN104032450A (en) * 2014-06-30 2014-09-10 赖禄波 Method for manufacturing shell fabric with bananas being used as raw materials
CN104195778A (en) * 2014-09-16 2014-12-10 江苏华信亚麻纺织有限公司 Finished flax yarn bleaching method
CN104684936A (en) * 2012-07-27 2015-06-03 克宁克莱克合作侨兴公司 Structuring agent for liquid detergent and personal care products
CN105040209A (en) * 2015-06-29 2015-11-11 张家港市杨舍新米洋针织厂 Manufacturing process for banana fiber fabric
CN105088484A (en) * 2015-07-13 2015-11-25 苏州华良化纤纺织有限公司 Manufacturing technology of banana stalk mix cotton fiber cloth
CN109914032A (en) * 2019-02-28 2019-06-21 常州朋悦纺织品有限公司 A kind of preparation method of comfortable ventilating fiber type suede

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Publication number Priority date Publication date Assignee Title
CN101768802B (en) * 2010-01-01 2011-07-27 沅江市明星麻业有限公司 Blended yarn by short spinning of banana phloem fiber and ramie and production method thereof
CN101897839A (en) * 2010-07-20 2010-12-01 郑文武 Comprehensive utilization method of banana stalks
CN101897839B (en) * 2010-07-20 2012-05-02 郑文武 Comprehensive utilization method of banana stalks
CN101982571B (en) * 2010-09-10 2012-05-23 中国科学院过程工程研究所 Preparation method of banana fiber from banana stems and leaves by steam explosion degumming
CN101982571A (en) * 2010-09-10 2011-03-02 中国科学院过程工程研究所 Preparation method of banana fiber from banana stems and leaves by steam explosion degumming
CN101974818B (en) * 2010-09-26 2012-08-29 郭建南 Banana plant fabric and preparation method thereof
CN101974818A (en) * 2010-09-26 2011-02-16 郭建南 Banana plant fabric and preparation method thereof
CN104684936A (en) * 2012-07-27 2015-06-03 克宁克莱克合作侨兴公司 Structuring agent for liquid detergent and personal care products
CN104684936B (en) * 2012-07-27 2017-10-17 克宁克莱克合作侨兴公司 Structural agent as liquid cleaner and personal care product
CN104032450A (en) * 2014-06-30 2014-09-10 赖禄波 Method for manufacturing shell fabric with bananas being used as raw materials
CN104195778A (en) * 2014-09-16 2014-12-10 江苏华信亚麻纺织有限公司 Finished flax yarn bleaching method
CN105040209A (en) * 2015-06-29 2015-11-11 张家港市杨舍新米洋针织厂 Manufacturing process for banana fiber fabric
CN105088484A (en) * 2015-07-13 2015-11-25 苏州华良化纤纺织有限公司 Manufacturing technology of banana stalk mix cotton fiber cloth
CN109914032A (en) * 2019-02-28 2019-06-21 常州朋悦纺织品有限公司 A kind of preparation method of comfortable ventilating fiber type suede

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