CN107447260A - A kind of preparation method of flax fiber - Google Patents
A kind of preparation method of flax fiber Download PDFInfo
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- CN107447260A CN107447260A CN201710940441.3A CN201710940441A CN107447260A CN 107447260 A CN107447260 A CN 107447260A CN 201710940441 A CN201710940441 A CN 201710940441A CN 107447260 A CN107447260 A CN 107447260A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
- D01C1/00—Treatment of vegetable material
- D01C1/02—Treatment of vegetable material by chemical methods to obtain bast fibres
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Abstract
The invention discloses a kind of preparation method of flax fiber, comprise the following steps：Screening, pretreatment of raw material, pre- degumming, for the first time dehydration, caustic dip processing, bleaching, stewing process, cleaning treatment, second of dehydration, drying and processing, health processing, mechanical shredding.Therefore, the present invention has the process for having more degumming, can prepare the higher flax fiber of pliability, and can reduce pollution of the aqueous slkali to environment.
Description
Technical field
The present invention designs a kind of preparation method of fiber, especially designs a kind of preparation method of flax fiber.
Background technology
Flax is the natural plant fibre that the mankind use earliest, away from modern existing more than 10,000 years history.Flax is pure natural
Fiber, because it has absorbing sweat, good air permeability and the distinguishing feature such as harmless, increasingly paid attention to by the mankind.
Flax fiber belongs to natural fiber, and bast fiber is belonged in cellulose fibre.In scouring processes, can only partly it take off
Glue, the presence of colloid, it is one of the reason for flax fiber feel is hardened.Flax fiber crystallinity height (70% or so), the degree of orientation
The angle of cut of height, fibril and fiber axis be less than 10 °, so extension at break it is small (in cotton fiber the angle of cut of fibril and fiber axis 20 °~
Between 30 °), the extension at break of fiber reflects the pliability of fiber, and by taking 41.67tex flax as an example, its extension at break is
4.2%, and its extension at break of 29.16tex cotton yarns is 7.7%, so flax is bigger than the rigidity of cotton fiber.
Increasing flax is used for the making of textile now, but considers level of comfort, it is necessary to flax fiber
Pliability and fineness have certain requirement.
Chinese patent application 201610031004.1 presses 1 to the raw materials such as flax and degumming liquid:10-20 weight ratio mixing,
The degumming 1-5 hours at 30-100 DEG C, then wash, oil, drying the fiber that must be both available for weaving.The degumming liquid can be with
For hydrogen peroxide, and add sodium phosphate, tripolyphosphate etc. and be used as chelating agent, using urea as hydrogen bond disrupting agent, add waterglass or
Hydroxymethyl cellulose is antiprecipitant, using sodium sulfite or sodium hydrogensulfite as lignin remover.But fibre prepared by this method
It is relatively low to tie up silk fineness ratio, and it is not soft enough, there is significant limitations in the application of field of textiles.
Chinese patent application 200910009283.5 disclose to flax carry out pickling, washing, oxidation, beat fibre, oil supply, take off
Water, softening, oil supply humidification, heap storage and mechanical shredding step, described oxidation step are：Every kilogram of flax fiber water 8-
12kg, adds sodium carbonate or potassium carbonate, sodium metasilicate, urea and penetrating agent JFC in present water, and addition contains for every liter of water after adding
Sodium carbonate or potassium carbonate 2-6g, sodium metasilicate 2-8g and penetrating agent JFC 1-4g, H2O2 is added after being completely dissolved, H2O2 additions with
Pure H2O2 is calculated as every liter of water after adding and contains H2O23-12g.But although fiber fineness ratio prepared by this method is higher, its pliability
Not enough, degumming degree is not strong enough, can not apply in personal home textile field.
Flax fiber fineness prepared by the above method is low, pliability deficiency, and the special installation that can be only applied to costliness is enterprising
Row spinning.In order to solve the above problems, it is necessary to carry out process of refinement to flax fiber, make the performance of fiber further complete
Kind, to realize that spinning line shortens, production efficiency is improved, and fiber flexibility improves, and application field is widened.
The content of the invention
In view of this, it is an object of the invention to propose a kind of preparation method of flax fiber, cotton provided by the invention
Flax fiber preparation method can make flax fiber have stronger flexibility and higher fineness, and be substituted for cotton
Flower and the property for keeping flax.
Based on a kind of above-mentioned purpose preparation method of flax fiber provided by the invention, comprise the following steps：
1) pre- degumming process, flax raw material is included into soda bath with pre- degumming liquid immersion treatment, the pre- degumming liquid；
2) caustic dip degumming process, by the degumming alkali lye digestion of the flax raw material after step 1 is handled, the degumming alkali lye bag
Containing soda ash solution and bleeding agent；
3) degumming process is aoxidized, by the oxidation solution digestion of the flax raw material after step 2 is handled, the oxidation solution includes oxygen
Agent and sodium silicate.
Preferably, in addition to sour cleaning treatment, by the flax raw material stewing process after step 3 is handled, carry out afterwards clear
Wash, and add hydrochloric acid.
Preferably, in addition to health step, flax after drying is stacked, adds water and softening agent.
Preferably, in addition to Feedstock treating step, more than 36 flax is picked out, and carry out shredding processing.
Preferably, in addition to combing step, flax after health step is put into carding machine, carries out cotton carding.
Preferably, in step 1,4-10 parts caustic soda, 1000-1500 part water are mixed in every 100 parts of flax raw materials, is placed on
18h-28h is soaked using 40 DEG C -80 DEG C of temperature in fermentation vat.
Preferably, flax in step 2 is permeated by every 100 parts mixing 1200-1500 parts water, 4-7 parts soda ash, 2-5 parts
Agent, 3-4h is boiled with 80 DEG C -120 DEG C of temperature.
Preferably, on the basis of step 2,6-10 parts sodium silicate, 10-15 part hydrogen peroxide are added again, continues to use 80-
120 DEG C of temperature boils 100-150 minutes.
Preferably, comprise the following steps：
(1) screen：Flax of different thicknesses is screened, more than 36 flax is picked out, obtains raw material；
(2) pretreatment of raw material：Shredding processing is carried out to the raw material obtained in (1), shredding into strips, while is removed miscellaneous
Thing；
(3) pre- degumming process：The flax obtained in (2) is mixed into 4-10 parts caustic soda, 1000-1500 part water by every 100 parts,
It is placed on the temperature immersion 18h-28h using 40 DEG C -80 DEG C in fermentation vat；
(4) it is dehydrated for the first time：Using centrifuge, the flax obtained in (3) is handled to 50% water content；
(5) caustic dip degumming process：By gained flax in (4) by every 100 parts mixing 1200-1500 parts water, 4-7 in saucepan
Part soda ash, 2-5 part bleeding agents, 3-4h is boiled with 80 DEG C -120 DEG C of temperature；
(6) degumming process is aoxidized：On the basis of (5), 6-10 parts sodium silicate, 10-15 part hydrogen peroxide are added again, are continued
100-150 minutes are boiled with 80-120 DEG C of temperature；
(7) stewing process：10-15h is stood in saucepan；
(8) cleaning treatment：Flax water filling obtained in (7) is subjected to 3-4 cleaning；
(9) second of dehydration：Flax of gained will place and carry out 2-3 time in centrifuge and be dehydrated in (8), up to surface without
Water；
(10) drying and processing：Flax of gained in (9) is put into roller drying machine and dried, untill drying；
(11) health is handled：Gained flax in (10) is stacked, 15-25 part water is added in flax in every 100 parts (10)
With 3-8 part softening agents, place 1-2 days, then flax of stacking is inside and outside changed up and down, then place 1-2 days；
(12) mechanical shredding：(11) gained flax passes through carding machine cotton carding in, obtains cotton flax fiber.
Preferably, the feed plate of carding machine can further raise 1-5cm to increase carding process length, preferably raise
2.5cm；This carding machine can be found in the carding machine of prior art, and two-shot of the present invention is to raise feed plate.That is, this
Art personnel know the structure of this carding machine with feed plate, and those skilled in the art are only needed described to cotton
Plate raises 1-5cm.
The present invention is elaborated below：
The technique that the present invention prepares cotton flax fiber is as follows：
Pre- degumming → flax degumming → the crofting of flax screening → flax pretreatment → flax and whole degumming → cleaning →
Drying → health → mechanical shredding.
By the screening of flax, selecting more than 36 flax, its feel, abrasion resistance, reflecting feel, thickness etc. all can be than branch
Number is few well a lot, and fiber quality is also relatively good, and flax pretreatment can effectively in advance will be miscellaneous in flax raw material
Matter is removed, and is effectively lightened the burden for later stage process；The pre- degumming of flax is burnt flax obtained above by every 100 parts mixing 4-10 parts
Alkali, 1000-1500 part water, the temperature immersion 18h-28h using 40 DEG C -80 DEG C in fermentation vat is placed on, so can be with low degree
Degumming, effectively avoid disposable strength degumming to fibre damage, after being dehydrated by first time, the flax carried out again
Degumming process, above-mentioned gained flax is put into saucepan, by every 100 parts mixing 1200-1500 parts water, 4-7 parts soda ash, 2-5 parts
Bleeding agent, it is most of dissolved to boil the colloidal cellulose such as 3-4h, such pectin and hemicellulose with 80 DEG C -120 DEG C of temperature；
On the basis of the above, 6-10 parts sodium silicate, 10-15 part hydrogen peroxide are added again, continue to boil 100-150 with 80-120 DEG C of temperature
Minute, 10-15h is stood in saucepan afterwards, sodium silicate can prevent hydrogen peroxide from being decomposed after meeting high temperature with Stabilizing Hydrogen Peroxide, this
It is the bleaching to flax, and flax can be made fine the further degumming of flax, three times the step of degumming while bleaching
Dimension is more soft；Cleaned, be dehydrated and dried afterwards, removed the chemical composition remained in degumming and bleaching process, avoid
Secondary response causes the damage of fiber again；Health is handled：Above-mentioned gained flax is stacked, in flax in every 100 parts of above-mentioned operations
15-25 parts water and 3-8 part softening agents are added, is placed 1-2 days, then flax of stacking is inside and outside changed up and down, then is placed 1-2 days,
Flax is sufficiently contacted with softening agent, and moisturize, to the damage of flax fiber when can effectively reduce mechanical shredding
Wound, in mechanical opening processes, fiber is sent into shredding machinery, be flax fiber after preliminary loose decomposition, fed
Enter carding machine and carry out careful shredding, in order to further reduce damage of the shredding to flax fiber, preferably too high carding machine
Feed plate, add carding process length.
Compared with prior art, advantages of the present invention is as follows：
1. chemical treating process disclosed by the invention employs shallow, deep, shallow mode and carried out 3 degummings, reduce one
The secondary complete degumming of property damages to caused by fiber, is effectively guaranteed the complete of fiber, and also enhance the soft of flax fiber
It is soft；
2. the flax fiber fineness, intensity prepared by the present invention are high, expand flax fiber uses field；
3. the present invention is also added into acid solution in cleaning process, not only lignin is precipitated, reduces flax fiber
In entrained lignin, avoid shredding difficult, and effectively neutralized the alkali in solution, pH value is reduced between 7-8
Pollution to environment.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, to this hair
Bright further description.
Embodiment one：
A kind of preparation method of flax fiber, comprises the following steps：
1) pre- degumming process, flax raw material is included into soda bath with pre- degumming liquid immersion treatment, the pre- degumming liquid；Often
100 portions of flax mix 5 parts of caustic soda, 1100 parts of water, are placed on the temperature immersion 24h using 60 DEG C in fermentation vat；
2) caustic dip degumming process, by the degumming alkali lye digestion of the flax raw material after step 1 is handled, the degumming alkali lye bag
Containing soda ash solution and bleeding agent；In saucepan by step 1 gained flax by every 100 parts mixing 1200 parts of water, 5 parts of soda ash, 5 parts
Bleeding agent, 3h is boiled with 90 DEG C of temperature；
3) degumming process is aoxidized, by the oxidation solution digestion of the flax raw material after step 2 is handled, the oxidation solution includes oxygen
Agent and sodium silicate, on the basis of step 2,7 parts of sodium silicates, 12 parts of hydrogen peroxide are added again, continue to be boiled with 100 DEG C of temperature
120 minutes；
4) flax fiber is drawn finally by drying, cotton carding.
Flax fiber Specifeca tion speeification prepared by table 1, embodiment one
Embodiment two：
(1) screen：Flax of different thicknesses is screened, more than 36 flax is picked out, obtains raw material；
(2) pretreatment of raw material：Shredding processing is carried out to the raw material obtained in (1), shredding into strips, while is removed miscellaneous
Thing；
(3) pre- degumming：By the flax obtained in (2) by 4 parts of caustic soda of every 100 parts mixing, 1000 parts of water, fermentation vat is placed on
It is middle that 18h is soaked using 40 DEG C of temperature；
(4) it is dehydrated for the first time：Using centrifuge, the flax obtained in (3) is handled to 50% water content；
(5) caustic dip is handled：In saucepan by gained flax in (4) by 1200 parts of water of every 100 parts mixing, 4 parts of soda ash, 2 parts
Bleeding agent, 3-4h is boiled with 80 DEG C of temperature；
(6) bleaching：On the basis of (5), 6 parts of sodium silicates, 10 parts of hydrogen peroxide are added again, continue the temperature with 80 DEG C
Degree boils 100 minutes；
(7) stewing process：10h is stood in saucepan；
(8) cleaning treatment：Flax water filling obtained in (7) is subjected to 3 cleanings；
(9) second of dehydration：Flax of gained in (8) is placed 2 dehydrations are carried out in centrifuge, until surface is anhydrous；
(10) drying and processing：Flax of gained in (9) is put into roller drying machine and dried, untill drying；
(11) health is handled：Gained flax in (10) is stacked, 15 parts of water and 3 are added in flax in every 100 parts (10)
Part softening agent, is placed 1 day, then flax of stacking is inside and outside changed up and down, then is placed 1 day；
(12) mechanical shredding：(11) gained flax passes through carding machine cotton carding in, obtains cotton flax fiber.
Flax fiber Specifeca tion speeification prepared by table 2, embodiment two
Embodiment three：
(1) screen：Flax of different thicknesses is screened, more than 36 flax is picked out, obtains raw material；
(2) pretreatment of raw material：Shredding processing is carried out to the raw material obtained in (1), shredding into strips, while is removed miscellaneous
Thing；
(3) pre- degumming：By the flax obtained in (2) by 6 parts of caustic soda of every 100 parts mixing, 1200 parts of water, fermentation vat is placed on
It is middle that 24h is soaked using 40 DEG C -80 DEG C of temperature；
(4) it is dehydrated for the first time：Using centrifuge, the flax obtained in (3) is handled to 50% water content；
(5) caustic dip is handled：In saucepan by gained flax in (4) by 1300 parts of water of every 100 parts mixing, 5 parts of soda ash, 3 parts
Bleeding agent, 3h is boiled with 100 DEG C of temperature；
(6) bleaching：On the basis of (5), 8 parts of sodium silicates, 12 parts of hydrogen peroxide are added again, are continued with 100 DEG C
Temperature is boiled 120 minutes；
(7) stewing process：12h is stood in saucepan；
(8) cleaning treatment：Flax water filling obtained in (7) is subjected to 2 cleanings；And inside add acid solution to ph most
7.2, control temperature is at 35 DEG C, then carries out 2 cleanings.
(9) second of dehydration：Flax of gained in (8) is placed 3 dehydrations are carried out in centrifuge, until surface is anhydrous；
(10) drying and processing：Flax of gained in (9) is put into roller drying machine and dried, untill drying；
(11) mechanical shredding：(10) gained flax passes through carding machine cotton carding in, obtains cotton flax fiber, mechanical shredding
In, the feed plate of carding machine raises 3cm than machine frame.
Flax fiber Specifeca tion speeification prepared by table 3, embodiment three
Example IV：
(1) screen：Flax of different thicknesses is screened, more than 36 flax is picked out, obtains raw material；
(2) pretreatment of raw material：Shredding processing is carried out to the raw material obtained in (1), shredding into strips, while is removed miscellaneous
Thing；
(3) pre- degumming：By the flax obtained in (2) by 10 parts of caustic soda of every 100 parts mixing, 1500 parts of water, immersion is placed on
28h is soaked using 80 DEG C of temperature in pond；
(4) it is dehydrated for the first time：Using centrifuge, the flax obtained in (3) is handled to 50% water content；
(5) caustic dip is handled：In saucepan by gained flax in (4) by 1500 parts of water of every 100 parts mixing, 7 parts of soda ash, 5 parts
Bleeding agent, 4h is boiled with 120 DEG C of temperature；
(6) bleaching：On the basis of (5), 10 parts of sodium silicates, 15 parts of hydrogen peroxide are added again, are continued with 120 DEG C
Temperature is boiled 150 minutes；
(7) stewing process：15h is stood in saucepan；
(8) cleaning treatment：Flax water filling obtained in (7) is subjected to 4 cleanings；And inside add acid solution to ph most
7.5, control temperature is at 40 DEG C, then carries out 2 cleanings.
(9) second of dehydration：Flax of gained in (8) is placed 3 dehydrations are carried out in centrifuge, until surface is anhydrous；
(10) drying and processing：Flax of gained in (9) is put into roller drying machine and dried, untill drying；
(11) health is handled：Gained flax in (10) is stacked, 25 parts of water and 8 are added in flax in every 100 parts (10)
Part softening agent, water and softening agent are pre-mixed, and are sprayed by spray equipment, are sprayed once per 4-6 hours, and to Asia
Numb heap is inside and outside changed up and down.
(12) mechanical shredding：(11) gained flax passes through carding machine cotton carding in, obtains cotton flax fiber.
Flax fiber Specifeca tion speeification prepared by table 4, example IV
Embodiment five：
A degumming is used in processing procedure, it is specific as follows,
(1) screen：Flax of different thicknesses is screened, more than 36 flax is picked out, obtains raw material；
(2) pretreatment of raw material：Shredding processing is carried out to the raw material obtained in (1), shredding into strips, while is removed miscellaneous
Thing；
(3) caustic dip is handled：In saucepan by gained flax in (2) by 1500 parts of water of every 100 parts mixing, 7 parts of soda ash, 5 parts
Bleeding agent, 4h is boiled with 120 DEG C of temperature；
(4) stewing process：15h is stood in saucepan；
(5) cleaning treatment：Flax water filling obtained in (4) is subjected to 4 cleanings；And inside add acid solution to ph most
7.5, control temperature is at 40 DEG C, then carries out 2 cleanings.
(6) second of dehydration：Flax of gained in (5) is placed 3 dehydrations are carried out in centrifuge, until surface is anhydrous；
(7) drying and processing：Flax of gained in (6) is put into roller drying machine and dried, untill drying；
(8) health is handled：Gained flax in (7) is stacked, 25 parts of water is added in flax in every 100 parts (7) and 8 parts soft
Soft dose, water and softening agent are pre-mixed, and sprayed by spray equipment, sprayed once per 4-6 hours, and to flax heap
Inside and outside changed up and down.
(9) mechanical shredding：(8) gained flax passes through carding machine cotton carding in, obtains cotton flax fiber.
The Specifeca tion speeification of the flax fiber of table 5, three times degumming and a bracket
As seen from the above-described embodiment, degumming number has certain influence to the performance of flax fiber, and acid cleaning process is not only
The performance of flax fiber is improved, and has certain influence to the solution ph after degumming, can effectively be reduced
Again processing work of the later stage to the solution, improves efficiency.
Embodiment six：
One is grown flax woollen blanket, including matte layer and bottom layer, and matte layer is arranged in bottom layer, and matte layer includes embodiment
Manufactured flax fiber in 3-5, the flax fiber intensity are 6.0CN/dtex, fineness 3200Nm.
Those of ordinary skills in the art should understand that：The specific embodiment of the present invention is the foregoing is only, and
The limitation present invention is not used in, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc.,
It should be included within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of flax fiber, it is characterised in that comprise the following steps：
(1) pre- degumming process, flax raw material is included into soda bath with pre- degumming liquid immersion treatment, the pre- degumming liquid；
(2) caustic dip degumming process, by the degumming alkali lye digestion of the flax raw material after step 1 is handled, the degumming alkali lye includes
Soda ash solution and bleeding agent；
(3) degumming process is aoxidized, by the oxidation solution digestion of the flax raw material after step 2 is handled, the oxidation solution includes oxidation
Agent and sodium silicate.
2. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that at also including sour cleaning
Reason, the flax raw material stewing process after step 3 is handled is cleaned, and add hydrochloric acid afterwards.
3. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that also including health step,
Flax after drying is stacked, adds water and softening agent.
4. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that also walked including Feedstock treating
Suddenly, more than 36 flax is picked out, and carries out shredding processing.
5. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that in step 1, every 100
4-10 parts caustic soda, 1000-1500 part water are mixed in part flax raw material, is placed in fermentation vat and is soaked using 40 DEG C -80 DEG C of temperature
Steep 18h-28h.
6. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that by flax in step 2
By every 100 parts mixing 1200-1500 parts water, 4-7 parts soda ash, 2-5 part bleeding agents, 3-4h is boiled with 80 DEG C -120 DEG C of temperature.
7. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that on the basis of step 2,
6-10 parts sodium silicate, 10-15 part hydrogen peroxide are added again, continue to boil 100-150 minutes with 80-120 DEG C of temperature.
8. according to a kind of preparation method of flax fiber described in claim 1, it is characterised in that comprise the following steps：
(1) screen：Flax of different thicknesses is screened, more than 36 flax is picked out, obtains raw material；
(2) pretreatment of raw material：Shredding processing is carried out to the raw material obtained in (1), shredding into strips, while removes debris；
(3) pre- degumming process：By the flax obtained in (2) by every 100 parts mixing 4-10 parts caustic soda, 1000-1500 part water, place
18h-28h is soaked using 40 DEG C -80 DEG C of temperature in fermentation vat；
(4) it is dehydrated for the first time：Using centrifuge, the flax obtained in (3) is handled to 50% water content；
(5) caustic dip degumming process：It is in saucepan that gained flax in (4) is pure by every 100 parts mixing 1200-1500 parts water, 4-7 parts
Alkali, 2-5 part bleeding agents, 3-4h is boiled with 80 DEG C -120 DEG C of temperature；
(6) degumming process is aoxidized：On the basis of (5), 6-10 parts sodium silicate, 10-15 part hydrogen peroxide are added again, continues to use
80-120 DEG C of temperature boils 100-150 minutes；
(7) stewing process：10-15h is stood in saucepan；
(8) cleaning treatment：Flax water filling obtained in (7) is subjected to 3-4 cleaning；
(9) second of dehydration：Flax of gained in (8) is placed 2-3 dehydration is carried out in centrifuge, until surface is anhydrous；
(10) drying and processing：Flax of gained in (9) is put into roller drying machine and dried, untill drying；
(11) health is handled：Gained flax in (10) is stacked, 15-25 parts water and 3-8 are added in flax in every 100 parts (10)
Part softening agent, is placed 1-2 days, then flax of stacking is inside and outside changed up and down, then is placed 1-2 days；
(12) mechanical shredding：(11) gained flax passes through carding machine cotton carding in, obtains cotton flax fiber.
9. one grows flax woollen blanket, it is characterised in that with the preparation method institute according to any one flax fiber in claim 1-8
Flax woollen blanket made of obtained flax fiber.
10. according to claim 9 one grows flax woollen blanket, it is characterised in that described including flax fiber layer and bottom layer
Flax fiber layer be arranged on bottom layer；The flax fiber intensity is 5.0-9.0cN/dtex, fineness 1700-3400Nm.
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| CN109467873A (en) * | 2018-09-29 | 2019-03-15 | 句容峰岭科技有限公司 | A kind of preparation method of flaxen fiber phenolic resin composite |
| WO2022015179A1 (en) | 2020-07-13 | 2022-01-20 | Firma Handlowo-Usługowa Instbud Stanisław Boguta Spółka Jawna | The multi-layer composite sleeve, in particular for trenchless pipeline rehabilitation |
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| CN102242403A (en) * | 2011-06-15 | 2011-11-16 | 浙江农林大学 | Production process for linen bamboo fibers, spinnable linen bamboo fibers and bamboo fiber yarns |
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| CN109467873A (en) * | 2018-09-29 | 2019-03-15 | 句容峰岭科技有限公司 | A kind of preparation method of flaxen fiber phenolic resin composite |
| WO2022015179A1 (en) | 2020-07-13 | 2022-01-20 | Firma Handlowo-Usługowa Instbud Stanisław Boguta Spółka Jawna | The multi-layer composite sleeve, in particular for trenchless pipeline rehabilitation |
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Application publication date: 20171208 |