CN110983501A - Regeneration process for producing spinnable fiber by using jean broken fabric - Google Patents
Regeneration process for producing spinnable fiber by using jean broken fabric Download PDFInfo
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- CN110983501A CN110983501A CN201911278740.0A CN201911278740A CN110983501A CN 110983501 A CN110983501 A CN 110983501A CN 201911278740 A CN201911278740 A CN 201911278740A CN 110983501 A CN110983501 A CN 110983501A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G11/00—Disintegrating fibre-containing articles to obtain fibres for re-use
- D01G11/04—Opening rags to obtain fibres for re-use
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
- D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
- D06L4/23—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using hypohalogenites
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
- D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
- D06L4/24—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using chlorites or chlorine dioxide
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
- D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
- D06M11/56—Sulfates or thiosulfates other than of elements of Groups 3 or 13 of the Periodic System
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/76—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon oxides or carbonates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
- D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
Abstract
A regeneration process for producing spinnable fiber by using jean broken fabric comprises the following steps: desizing; stripping; bleaching; dechlorination; opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a cloth block by using a nail plate opener of a brad gill needle beater, and further opening the denim broken fabric subjected to preliminary opening into cotton by using a sawtooth beater opener; cleaning and popping: using a sawtooth type scutching machine to scutche the cotton subjected to the opening step into regenerated cotton, and repeatedly performing the process for 3 to 4 times; carding: and (3) carding the cotton subjected to the scutching step for 1-2 times, and processing the cotton into spinnable fibers. Compared with the prior art, the invention can further uniformly open the fibers into cotton, greatly improve the yield, increase the cleaning process and enable the denim broken fabric to become spinnable regenerated cotton; the carding times are increased, the quality of the fiber is greatly improved, and the fiberization effect is further improved.
Description
Technical Field
The invention belongs to the technical field of waste textile fabric recovery, and particularly relates to a regeneration process for producing spinnable fibers by using jean broken fabrics.
Background
In the production process of jeans wear, for example: the procedures of warp sizing, jean weaving, jean after finishing, clothing making, washing and the like can generate a large amount of leftover bits and pieces, defective products and the like. These leftover and rejects belong to the textile industry solid waste, which we collectively refer to as denim fabric shreds.
If the jean fabric is treated as waste, the waste is wasted, and the environment is polluted. The manufacturers producing these denim wastes usually do not have the ability of recycling, but only can process the denim wastes at low cost, and some people can simply recycle the denim wastes after purchasing the denim wastes. In the prior art, the treatment of the denim fabric comprises the steps of stripping, bleaching, dechlorination, fiberizing and the like, wherein the fiberizing treatment is particularly critical, and regenerated cotton fibers with different qualities and different grades can be produced according to different treatment modes. The problems that the regenerated cotton is easy to appear in the common opening treatment are as follows: insufficient fiber length, more short fibers, low strength, more thread ends, uneven opening and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a regeneration process for producing spinnable fibers by using denim fabric scraps, which can improve the fiberization treatment effect of the denim fabric scraps and ensure that the produced regenerated cotton meets the requirements of the spinnable fibers.
In order to achieve the purpose, the technical scheme of the invention comprises the following steps:
desizing: adding the denim fabric into a container, adding amylase, adding salt and a penetrating agent, heating to 50-55 ℃, keeping for 30-60 minutes, and then cleaning;
stripping: adding 80% sodium chlorite, adding penetrant to make the pH value of the solution reach 3.5-4.2, the bath ratio reach 1:5-1:10, and soaking for 3-5 hours;
bleaching: adding 10% sodium hypochlorite, adjusting pH to 9-10, adding water to make bath ratio reach 1:5-1:10, soaking at room temperature for 40-80 min;
dechlorination: adding a certain amount of water, then adding sodium sulfite and sodium carbonate, keeping the bath ratio at 1:5-1:10, heating to 50-60 ℃, and keeping the temperature and cleaning for 30-50 minutes.
Opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a cloth block by using a nail plate opener of a brad gill needle beater, and further opening the denim broken fabric subjected to preliminary opening into cotton by using a sawtooth beater opener;
cleaning and popping: using a sawtooth type scutching machine to scutche the cotton subjected to the opening step into regenerated cotton, and repeatedly performing the process for 3 to 4 times;
carding: and (3) carding the cotton subjected to the scutching step for 1-2 times, and processing the cotton into spinnable fibers.
Preferably, in the desizing step, the weight of the added amylase accounts for 0.5-1% of the weight of the denim broken fabric, the weight of the added salt accounts for 1-2% of the weight of the denim broken fabric, and the weight of the added penetrant accounts for 0.2-0.5% of the weight of the denim broken fabric.
Preferably, in the stripping step, the weight of the added sodium chlorite accounts for 4-6% of the weight of the denim broken fabric before the desizing step, and the weight of the added penetrant accounts for 0.2-0.5% of the weight of the denim broken fabric before the desizing step.
Preferably, in the bleaching step, the weight of the added sodium hypochlorite accounts for 5-10% of the weight of the denim broken fabric before the desizing step.
Preferably, in the dechlorination step, the weight of the added sodium sulfite accounts for 1-1.5% of the weight of the denim broken fabric before the desizing step, and the weight of the added soda accounts for 1-1.5% of the weight of the denim broken fabric before the desizing step.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the first opening utilizes the 600-diameter large-diameter brad beater nail plate opener to open instead of the previous 400-diameter small-diameter sawtooth opener, so that the fiber damage is greatly reduced. The second is further opened with major diameter sawtooth class hired roughneck opener, can make the further even opening of fibre become the cotton, and output improves greatly moreover.
2. The process of cleaning the cotton wool is added, and the process of cleaning the cotton wool is mainly to further fiberize the preliminarily opened raw materials to form the spinnable regenerated cotton.
3. The carding times are increased, and the quality of the fiber is greatly improved. Not only can the fiberization effect be further improved, but also the cellulose filaments and insufficiently opened fiber bundles can be removed.
Detailed Description
The basic process flow of the embodiment of the invention is as follows:
desizing: adding the denim fabric into a container, adding amylase, adding salt and a penetrating agent, heating to 50-55 ℃, keeping for 30-60 minutes, and then cleaning;
stripping: adding 80% sodium chlorite, adding penetrant to make the pH value of the solution reach 3.5-4.2, the bath ratio reach 1:5-1:10, and soaking for 3-5 hours;
bleaching: adding 10% sodium hypochlorite, adjusting pH to 9-10, adding water to make bath ratio reach 1:5-1:10, soaking at room temperature for 40-80 min;
dechlorination: adding a certain amount of water, then adding sodium sulfite and sodium carbonate, keeping the bath ratio at 1:5-1:10, heating to 50-60 ℃, and keeping the temperature and cleaning for 30-50 minutes.
Opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a fabric block by using a brad beater nail plate opener or a comb beater nail plate opener, and further opening the preliminarily opened denim broken fabric into cotton by using a sawtooth beater opener;
cleaning and popping: using a sawtooth type scutching machine to scutche the cotton subjected to the opening step into regenerated cotton, and repeatedly performing the process for 3 to 4 times;
carding: and (3) carding the cotton subjected to the scutching step for 1-2 times, and processing the cotton into spinnable fibers.
In the desizing step, the weight of the added amylase accounts for 0.5-1% of the weight of the denim broken fabric, the weight of the added salt accounts for 1-2% of the weight of the denim broken fabric, and the weight of the added penetrant accounts for 0.2-0.5% of the weight of the denim broken fabric.
In the stripping step, the weight of the added sodium chlorite accounts for 4-6% of the weight of the denim broken fabric before the desizing step, and the weight of the added penetrant accounts for 0.2-0.5% of the weight of the denim broken fabric before the desizing step.
In the bleaching step, the weight of the added sodium hypochlorite accounts for 5-10% of the weight of the denim broken fabric before the desizing step.
In the dechlorination step, the weight of the added sodium sulfite accounts for 1-1.5% of the weight of the denim broken fabric before the desizing step, and the weight of the added soda accounts for 1-1.5% of the weight of the denim broken fabric before the desizing step. The following is a description of several terms referred to above:
the dye vat refers to various devices used by a printing and dyeing mill, such as a common cloth boiling pot, a high-temperature high-pressure dyeing machine, a loose fiber dyeing machine and the like.
The bath ratio is a printing and dyeing terminology, i.e. the ratio of the weight of the fabric to the volume of the treatment solution. For example, a bath ratio of 1:10 means that 1 ton of fiber is treated with 10 tons of aqueous solution.
The pH value can be adjusted by dilute sulphuric acid and acetic acid.
The trisodium phosphate, sodium chlorite, soda ash, caustic soda and the like are solid in nature and need to be dissolved before being added to the treatment solution.
The angle pin beater nail plate, the gill pin beater nail plate and the sawtooth beater refer to parts of a loosening machine, which are well known by persons skilled in the art, the sawtooth type bullet cleaning machine refers to a bullet cleaning machine with sawtooth-shaped bullet cleaning rollers, and one bullet cleaning machine comprises 3-4 bullet cleaning rollers. The invention adopts a Stutt card beater, and the model number of the cleaning and popping machine adopts a domestic 250-type sawtooth cleaning and popping roller.
The present invention will be further described in detail with reference to the following specific examples, which are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the present invention is not limited to the following examples.
Example 1
Desizing: adding the denim broken fabric into a container, adding amylase into the container, wherein the weight of the amylase accounts for 0.5% of the weight of the denim broken fabric, adding table salt accounting for 1% of the weight of the denim broken fabric and penetrating agent accounting for 0.2% of the weight of the denim broken fabric into the container, heating to 50 ℃, keeping the temperature for 30 minutes, and then cleaning.
Stripping: and stripping the washed jean fabric after desizing. Adding 80% sodium chlorite into the jean fabric in a container, wherein the weight of the sodium chlorite accounts for 4% of the weight of the jean fabric, then adding 0.2% penetrant of the weight of the jean fabric, so that the pH value of the solution reaches 3.5, the bath ratio reaches 1:5, sealing the container, and soaking for 3 hours at room temperature.
Bleaching: bleaching after desizing and stripping. Adding a sodium hypochlorite solution with the concentration of 10 percent into a container containing water, wherein the weight of the sodium hypochlorite solution accounts for 5 percent of the weight of the waste yarn, enabling the pH value of the solution to reach 9 and the bath ratio to reach 1:5, soaking for 40 minutes at room temperature, and then discharging water to bleach the broken denim fabric.
Dechlorination: dechlorinating after bleaching. Then adding sodium sulfite accounting for 1 percent of the weight of the jean broken fabric and soda accounting for 1 percent of the weight of the jean broken fabric, keeping the bath ratio at 1:5, heating to 50 ℃, and keeping the temperature and cleaning for 30 minutes.
Opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a fabric block by using a comb-pin beater nail-plate opener or a brad beater nail-plate opener, and further opening the preliminarily opened denim broken fabric into cotton by using a sawtooth beater opener;
cleaning and popping: further fiberizing the cotton subjected to the opening step by using a sawtooth type bullet cleaning machine, and repeatedly performing for 3 times;
carding: and (3) carding the cotton subjected to the scutching step for 1 time, and processing the cotton into spinnable fibers.
Example 2
The difference from the example 1 is only in the selection of the process parameters, and the others are not changed, which are specifically as follows:
desizing: adding the denim broken fabric into a container, adding amylase into the container, wherein the weight of the amylase accounts for 0.75% of the weight of the denim broken fabric, adding table salt accounting for 1.5% of the weight of the denim broken fabric and penetrating agent accounting for 0.35% of the weight of the denim broken fabric into the container, heating to 52 ℃, keeping the temperature for 45 minutes, and then cleaning.
Stripping: and stripping the washed jean fabric after desizing. Adding 80% sodium chlorite into the jean fabric in a container, wherein the weight of the sodium chlorite accounts for 5% of the weight of the jean fabric, then adding 0.4% penetrant accounting for 0.8% of the weight of the jean fabric, so that the pH value of the solution reaches 3.8, the bath ratio reaches 1:7.5, sealing the container, and soaking for 4 hours at room temperature.
Bleaching: bleaching after desizing and stripping. Adding a sodium hypochlorite solution with the concentration of 10 percent into a container containing water, wherein the weight of the sodium hypochlorite solution accounts for 7 percent of the weight of the waste yarn, the pH value of the solution reaches 9.5, the bath ratio reaches 1:7.5, soaking for 60 minutes at room temperature, and then discharging water to complete the bleaching of the broken jean fabric.
Dechlorination: dechlorinating after bleaching. Then sodium sulfite accounting for 1.25 percent of the weight of the denim broken fabric and soda accounting for 1.25 percent of the weight of the denim broken fabric are added, the bath ratio is kept at 1:7.5, the temperature is raised to 55 ℃, and the denim broken fabric is kept warm and cleaned for 40 minutes.
Opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a fabric block by using a comb-pin beater nail-plate opener or a brad beater nail-plate opener, and further opening the preliminarily opened denim broken fabric into cotton by using a sawtooth beater opener;
cleaning and popping: further fiberizing the cotton subjected to the opening step by using a sawtooth type bullet cleaning machine, and repeatedly performing for 3 times;
carding: and (3) carding the cotton subjected to the scutching step for 2 times, and processing the cotton into spinnable fibers.
Example 3
The difference from the embodiments 1 and 2 is only in the selection of the process parameters, and other changes are not changed, specifically as follows:
desizing: adding the denim broken fabric into a container, adding amylase into the container, wherein the weight of the amylase accounts for 1% of the weight of the denim broken fabric, adding table salt accounting for 1.5% of the weight of the denim broken fabric and penetrating agent accounting for 0.5% of the weight of the denim broken fabric into the container, heating to 55 ℃, keeping the temperature for 60 minutes, and then cleaning.
Stripping: and stripping the washed jean fabric after desizing. Adding 80% sodium chlorite into the jean fabric in a container, wherein the weight of the sodium chlorite accounts for 6% of the weight of the jean fabric, then adding 0.5% penetrant accounting for 0.5% of the weight of the jean fabric, so that the pH value of the solution reaches 4.2, the bath ratio reaches 1:10, sealing the container, and soaking for 5 hours at room temperature.
Bleaching: bleaching after desizing and stripping. Adding a sodium hypochlorite solution with the concentration of 10% into a container containing water, wherein the weight of the sodium hypochlorite solution accounts for 10% of the weight of the waste yarn, enabling the pH value of the solution to reach 10 and the bath ratio to reach 1:10, soaking for 80 minutes at room temperature, and then discharging water to bleach the broken denim fabric.
Dechlorination: dechlorinating after bleaching. Then sodium sulfite accounting for 1.5 percent of the weight of the denim broken fabric and soda accounting for 1.5 percent of the weight of the denim broken fabric are added, the bath ratio is kept at 1:10, the temperature is raised to 60 ℃, and the denim broken fabric is kept warm and cleaned for 50 minutes.
Opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a fabric block by using a comb-pin beater nail-plate opener or a brad beater nail-plate opener, and further opening the preliminarily opened denim broken fabric into cotton by using a sawtooth beater opener;
cleaning and popping: further fiberizing the cotton subjected to the opening step by using a sawtooth type bullet cleaning machine, and repeatedly carrying out the process for 4 times;
carding: and (3) carding the cotton subjected to the scutching step for 1 time, and processing the cotton into spinnable fibers.
Comparative example
Firstly, the denim pieces are manually sorted, selected and classified, and then the denim pieces are opened, decontaminated and carded by a small-diameter sawtooth opener to form the non-spinnable raw material.
The finished products of examples 1-3 and comparative examples were subjected to the following fiber quality tests, the results of which are given in the following table.
Wherein: short Fiber Index (SFI) is the percentage of the number (or weight) of fibers less than 12.7mm (1/2 inches) or 16.5mm to the total number (or weight) of fibers when the length of cotton fibers is measured by an HVI Mass Meter. In China, short fibers generally refer to fibers with the length of less than 16 mm; specific strength is the strength of a material (the force experienced per unit area when broken) divided by its apparent density; elongation is the percentage of the ratio of the elongation of the original gauge length to the original gauge length after tensile failure of the test specimen; the micronaire value is a comprehensive index reflecting the fineness and maturity of cotton fibers, is one of important internal quality indexes of the cotton fibers, and is closely related to the use value of the cotton fibers. The micronaire value was classified into A, B, C grade and B grade as standard grade. The grade A value range is 3.7-4.2, and the quality is best; the value range of B grade is 3.5-3.6 and 4.3-4.9; the value range of grade C is 3.4 or less and 5.0 or more, and the quality is the worst; spinning uniformity index, i.e. spinning uniformity coefficient SCI: the spinning uniformity coefficient is HVI provides a multiple regression empirical formula which reflects the spinnability of the fiber and estimates the resultant yarn strength, and the formula relates to 6 parameters of fiber breaking ratio strength, micronaire value, upper half average length, length uniformity, reflectivity and yellow depth in the test items.
From the above table, it can be seen that the embodiment 2 is the best embodiment, and meanwhile, the large-diameter brad-type opener is used for opening instead of the conventional small-diameter saw-tooth-type opener, so that the damage to the fibers can be reduced, the cleaning process is added, the fineness of the cotton can be increased, and the cotton is further fiberized.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (8)
1. A regeneration process for producing spinnable fiber by using jean broken fabric is characterized by comprising the following steps:
desizing: adding the denim fabric into a container, adding amylase, adding salt and a penetrating agent, heating to 50-55 ℃, keeping for 30-60 minutes, and then cleaning;
stripping: adding 80% sodium chlorite, adding penetrant to make the pH value of the solution reach 3.5-4.2, the bath ratio reach 1:5-1:10, and soaking for 3-5 hours;
bleaching: adding 10% sodium hypochlorite, adjusting pH to 9-10, adding water to make bath ratio reach 1:5-1:10, soaking at room temperature for 40-80 min;
dechlorination: adding a certain amount of water, then adding sodium sulfite and sodium carbonate, keeping the bath ratio at 1:5-1:10, heating to 50-60 ℃, and keeping the temperature and cleaning for 30-50 minutes;
opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a fabric block by using a brad beater opener, and further opening the denim broken fabric subjected to preliminary opening into cotton by using a sawtooth beater opener;
cleaning and popping: using a sawtooth type scutching machine to scutche the cotton subjected to the opening step into regenerated cotton, and repeatedly performing the process for 3 to 4 times;
carding: and (3) carding the cotton subjected to the scutching step for 1-2 times, and processing the cotton into spinnable fibers.
2. The regeneration process according to claim 1, characterized in that: in the desizing step, the weight of the added amylase accounts for 0.5-1% of the weight of the denim broken fabric, the weight of the added salt accounts for 1-2% of the weight of the denim broken fabric, and the weight of the added penetrant accounts for 0.2-0.5% of the weight of the denim broken fabric.
3. The regeneration process according to claim 1, characterized in that: in the stripping step, the weight of the added sodium chlorite accounts for 4-6% of the weight of the denim broken fabric before the desizing step, and the weight of the added penetrant accounts for 0.2-0.5% of the weight of the denim broken fabric before the desizing step.
4. The regeneration process according to claim 1, characterized in that: in the bleaching step, the weight of the added sodium hypochlorite accounts for 5-10% of the weight of the denim broken fabric before the desizing step.
5. The regeneration process according to claim 1, characterized in that: in the dechlorination step, the weight of the added sodium sulfite accounts for 1-1.5% of the weight of the denim broken fabric before the desizing step, and the weight of the added soda accounts for 1-1.5% of the weight of the denim broken fabric before the desizing step.
6. Regeneration process according to claim 1, characterized by comprising the following steps:
desizing: adding the denim broken fabric into a container, adding amylase into the container, wherein the weight of the amylase accounts for 0.5% of the weight of the denim broken fabric, adding table salt accounting for 1% of the weight of the denim broken fabric and penetrating agent accounting for 0.2% of the weight of the denim broken fabric into the container, heating to 50 ℃, keeping the temperature for 30 minutes continuously, and then cleaning;
stripping: stripping the washed denim fabric after desizing, firstly adding 80% sodium chlorite into the denim fabric in a container, wherein the weight of the sodium chlorite accounts for 4% of the weight of the denim fabric, then adding 0.2% of penetrant to enable the pH value of the solution to reach 3.5 and the bath ratio to reach 1:5, sealing the container, and soaking for 3 hours at room temperature;
bleaching: bleaching after desizing and stripping; adding a sodium hypochlorite solution with the concentration of 10 percent into a container containing water, wherein the weight of the sodium hypochlorite solution accounts for 5 percent of the weight of the waste yarn, the pH value of the solution reaches 9, the bath ratio reaches 1:5, soaking for 40 minutes at room temperature, and then discharging water to bleach the broken denim fabric;
dechlorination: dechlorinating after bleaching; then adding sodium sulfite accounting for 1 percent of the weight of the jean broken fabric and soda accounting for 1 percent of the weight of the jean broken fabric, keeping the bath ratio at 1:5, heating to 50 ℃, and keeping the temperature and cleaning for 30 minutes;
opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a cloth block by using a nail plate opener of a brad gill needle beater, and further opening the denim broken fabric subjected to preliminary opening into cotton by using a sawtooth beater opener;
cleaning and popping: further fiberizing the cotton subjected to the opening step by using a sawtooth type bullet cleaning machine, and repeatedly performing for 3 times;
carding: and (3) carding the cotton subjected to the scutching step for 1 time, and processing the cotton into spinnable fibers.
7. Regeneration process according to claim 1, characterized by comprising the following steps:
desizing: adding the denim broken fabric into a container, adding amylase into the container, wherein the weight of the amylase accounts for 0.75% of the weight of the denim broken fabric, adding table salt accounting for 1.5% of the weight of the denim broken fabric and penetrating agent accounting for 0.35% of the weight of the denim broken fabric into the container, heating to 52 ℃, keeping the temperature for 45 minutes continuously, and cleaning;
stripping: stripping the washed jean fabric after desizing; firstly, adding 80% sodium chlorite with the weight accounting for 5% of the weight of the denim broken fabric into the denim broken fabric in a container, then adding 0.4% penetrant accounting for 0.4% of the weight of the denim broken fabric to enable the pH value of the solution to reach 3.8 and the bath ratio to reach 1:7.5, sealing the container, and soaking for 4 hours at room temperature;
bleaching: bleaching after desizing and stripping; adding a sodium hypochlorite solution with the concentration of 10 percent into a container containing water, wherein the weight of the sodium hypochlorite solution accounts for 7 percent of the weight of the waste yarn, the pH value of the solution reaches 9.5, the bath ratio reaches 1:7.5, soaking for 60 minutes at room temperature, and then discharging water to bleach the broken denim fabric;
dechlorination: bleaching, dechlorinating, adding sodium sulfite accounting for 1.25 percent of the weight of the denim broken fabric and soda accounting for 1.25 percent of the weight of the denim broken fabric, keeping the bath ratio at 1:7.5, heating to 55 ℃, and keeping the temperature and washing for 40 minutes;
opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a fabric block by using a brad beater nail plate opener or a comb beater nail plate opener, and further opening the preliminarily opened denim broken fabric into cotton by using a sawtooth beater opener;
cleaning and popping: further fiberizing the cotton subjected to the opening step by using a sawtooth type bullet cleaning machine, and repeatedly performing for 3 times;
carding: and (3) carding the cotton subjected to the scutching step for 2 times, and processing the cotton into spinnable fibers.
8. Regeneration process according to claim 1, characterized by comprising the following steps:
desizing: adding the denim broken fabric into a container, adding amylase into the container, wherein the weight of the amylase accounts for 1% of the weight of the denim broken fabric, adding table salt accounting for 1.5% of the weight of the denim broken fabric and a penetrating agent accounting for 0.5% of the weight of the denim broken fabric into the container, heating to 55 ℃, keeping the temperature for 60 minutes continuously, and cleaning;
stripping: stripping the washed jean fabric after desizing; firstly, adding 80% sodium chlorite with the weight accounting for 6% of the weight of the denim broken fabric into the denim broken fabric in a container, then adding 0.5% penetrant accounting for 0.5% of the weight of the denim broken fabric to enable the pH value of the solution to reach 4.2 and the bath ratio to reach 1:10, sealing the container, and soaking for 5 hours at room temperature;
bleaching: bleaching after desizing and stripping; adding a sodium hypochlorite solution with the concentration of 10 percent into a container containing water, wherein the weight of the sodium hypochlorite solution accounts for 10 percent of the weight of the waste yarn, the pH value of the solution reaches 10, the bath ratio reaches 1:10, soaking for 80 minutes at room temperature, and then discharging water to bleach the broken denim fabric;
dechlorination: dechlorinating after bleaching; then adding sodium sulfite accounting for 1.5 percent of the weight of the denim broken fabric and soda accounting for 1.5 percent of the weight of the denim broken fabric, keeping the bath ratio at 1:10, heating to 60 ℃, and keeping the temperature and cleaning for 50 minutes;
opening: preliminarily opening the denim broken fabric subjected to the dechlorination step into a cloth block by using a nail plate opener of a brad gill needle beater, and further opening the denim broken fabric subjected to preliminary opening into cotton by using a sawtooth beater opener;
cleaning and popping: further fiberizing the cotton subjected to the opening step by using a sawtooth type bullet cleaning machine, and repeatedly carrying out the process for 4 times;
carding: and (3) carding the cotton subjected to the scutching step for 1 time, and processing the cotton into spinnable fibers.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115404579A (en) * | 2022-10-13 | 2022-11-29 | 浙江九舜纺织有限公司 | Process for processing textile waste yarn into yarn |
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| CN115404579A (en) * | 2022-10-13 | 2022-11-29 | 浙江九舜纺织有限公司 | Process for processing textile waste yarn into yarn |
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