CN103437156A - Crystal variation modification method of cotton/flax/viscose blended yarn - Google Patents
Crystal variation modification method of cotton/flax/viscose blended yarn Download PDFInfo
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- CN103437156A CN103437156A CN2013103206548A CN201310320654A CN103437156A CN 103437156 A CN103437156 A CN 103437156A CN 2013103206548 A CN2013103206548 A CN 2013103206548A CN 201310320654 A CN201310320654 A CN 201310320654A CN 103437156 A CN103437156 A CN 103437156A
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- flax
- cotton
- blended yarn
- viscose blended
- pressure
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Abstract
The invention relates to a crystal variation modification method of cotton/flax/viscose blended yarn. The crystal variation modification method comprises following steps: cotton/flax/viscose blended yarn is delivered into a sealed container; a modification medium is added; the pressure of the sealed container is increased to be as large as a modification pressure, and then is decreased instantaneously; the modification medium is removed, and then the crystal variation modified cotton/flax/viscose blended yarn is obtained. Advantages of the crystal variation modification method are that: 1) the cotton/flax/viscose blended yarn is modified by change of crystal lattice shape, original defects of the cotton/flax/viscose blended yarn are eliminated, pores are enlarged, crystallinity is reduced, the cotton/flax/viscose blended yarn is softened, and dimensional stability, softness and dyeing properties of the obtained products are improved; 2) instantaneous pressure release is employed, so that the modified cotton/flax/viscose blended yarn expands to a highest degree, bulkiness and softness of the cotton/flax/viscose blended yarn are increased greatly, and spinning, weaving and dyeing performances of the cotton/flax/viscose blended yarn are improved significantly.
Description
Technical field
The crystalline substance that the present invention relates to a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, specifically a kind of by the modification medium being pressurized to modifier pressure and the cotton/brilliant method of modifying that becomes of Flax/Viscose blended yarn of abrupt release pressure after pressurize a period of time.
Background technology
Cotton/Flax/Viscose blended yarn is to be formed by certain proportioning blending by cotton fiber, linen fibre and viscose, blending makes cotton, flax and viscose glue form mutual supplement with each other's advantages, make the yarn after blending there is the advantages such as good hygroscopicity, gas permeability, antibiotic property, but still exist difficulty to spin, the shortcoming such as difficulty is knitted, difficulty is dyed.
In order to change above-mentioned present situation, existing a variety of method of modifying, as physical modification method, chemical modification method and biological modified method.It is processing modified etc. that physical modification method mainly comprises that discharge technology modification, high steam dodge quick-fried modification, ultrasonic cavitation and microwave irradiation modification, liquefied ammonia.Chemical modification method mainly comprises esters modification, ethers modification, graft modification and cross-linking modified etc.
The method of modifying that has formed now industrialization production both at home and abroad mainly contains the processing modified and alkali mercerized modification of liquefied ammonia.Liquid ammonia modified and alkali mercerized processing has similar effect, as characteristics such as natural crimp disappear, cross section becomes circle, inner chamber diminishes, but the residual alkali lye of alkali mercerized modification is difficult for removing and also can cause yarn to melt erosion and inhomogeneities, and topmost difference is that liquid ammonia modified effect is better than alkali mercerized modification.The domestic liquefied ammonia that utilizes is as the modification medium, in the collect yarn of boost-pressurize of routine in closed container-again, the method for modification medium has certain effect to cotton, and the method is modification for once, swelling not thoroughly, degree of crystallinity reduce not obvious, dyeability do not have be improved significantly.
Summary of the invention
The crystalline substance that the purpose of this invention is to provide a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, specifically a kind of by the modification medium being pressurized to modifier pressure and the cotton/brilliant method of modifying that becomes of Flax/Viscose blended yarn of abrupt release pressure after pressurize a period of time.
The crystalline substance of a kind of cotton of the present invention/Flax/Viscose blended yarn becomes method of modifying, that cotton/Flax/Viscose blended yarn is placed in to closed container, be filled with the modification medium, boost to modifier pressure, then abrupt release pressure, remove the modification medium, obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.Its principle is: cotton/Flax/Viscose blended yarn is placed in to closed container, movable sealing under the under high pressure movable sealing of this closed container and negative pressure, and zero leakage.By pressure balance topping up and non-equilibrium constant speed topping up, can regulate the flow, time and the temperature that are filled with modification medium in closed container, thereby the rate of change of pressure, two-phase interface and the above-mentioned parameter of regulation and control modification, and then the running parameters such as permeability, infiltration rate and evaporation rate of regulation and control liquid medium; Regulate the dwell time of modifier pressure simultaneously; Above-mentioned technique can make the diffusion coefficient of modification medium improve, the modification medium is penetrated in the yarn tissue preferably, the intermolecular hydrogen bond network of reconstruct yarn fibers, changed the microstructure of yarn fibers, the motion of aggravation macromolecular chain segment, make the intermolecular generation swelling action of yarn fibers, and hole increases, degree of crystallinity reduces, and has realized the once regulation and control of yarn lattice structure.Again by the high speed overflow, a large amount of liquid modified media in the abrupt release closed container, produce huge pressure reduction in yarn organization internal and outside moment, form high speed quick-fried swollen, the diffusion coefficient of modification medium significantly improved, Perfect Reconstruction the intermolecular hydrogen bond network of yarn fibers, the intermolecular swelling action of yarn fibers is more thorough, hole increases obviously, and degree of crystallinity significantly reduces, and has realized the secondary regulation and control of yarn lattice structure.The modification medium that finally adopts heating and vacuumize in parallel method of evaporating removal cotton/Flax/Viscose blended yarn has completed the described brilliant method of modifying that becomes.Brilliant become after modification cotton/Flax/Viscose blended yarn to have softness good, wrinkle resistant nonshrink, durable fluffy, significantly improved the spinning of yarn, knit, the metachromia energy, become the remarkable material that newly spins.
As preferred technical scheme:
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, and the fineness of described cotton/Flax/Viscose blended yarn is 10～90, and blending rate is A:B:C=2～94:94～2:(100-A-B in mass ratio), and A+B<100.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, by twice intermolecular hydrogen bond network of reconstruct yarn fibers, the secondary regulation and control of yarn lattice structure have been realized, make the intermolecular swelling action of yarn fibers more thorough, hole obviously increases, and degree of crystallinity obviously reduces, and dye-uptake improves, COLOR FASTNESS improves, and finally adopts the modification medium that heats and vacuumize in parallel method of evaporating removal cotton/Flax/Viscose blended yarn to complete the described brilliant modification that becomes.Adopt the described brilliant method of modifying that becomes, can make the brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn compare with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, hole increases 14%～17%, and degree of crystallinity reduces 20～26%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 25%～34%, and COLOR FASTNESS improves 20%～23%.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, and the modification medium is liquefied ammonia; The modification medium need possess following 3 features: 1) have good diffusivity; 2) hydrogen bond that can be a large amount of with the intermolecular formation of yarn fibers, the intermolecular hydrogen bond network of reconstruct yarn fibers, the swelling behavior of raising yarn; 3) be easy to the phase transformation regulation and control, be convenient to the evaporation of modification medium and reclaim.And liquefied ammonia has, molecular weight is little, viscosity is little, surface tension is little, be easy to the special physical propertys such as phase transformation, and these special natures make liquefied ammonia meet above-mentioned three features.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, the modifier pressure abrupt release, moment produces larger pressure differential, can significantly improve the diffusion coefficient of modification medium, making cotton/Flax/Viscose blended yarn produce abundant swelling, is the brilliant critical process process that becomes modification.To different cottons/Flax/Viscose blended yarn, the modifier pressure difference of requirement, the speed difference of earth pressure release, the pressure differential difference that moment produces, under the prerequisite that does not improve modifier pressure, obtain high as far as possible release pressure poor, should make modifier pressure drop to negative pressure.To cotton/Flax/Viscose blended yarn, modifier pressure need to be more than or equal to 0.5MPa, can reach 1.8MPa.Therefore described modifier pressure P should be 0.5～1.8MPa.Poor for obtaining high as far as possible release pressure, should make modifier pressure drop to negative pressure, so the abrupt release of modifier pressure, require modifier pressure moment drop to modifier pressure 1% and below.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, and for the standard technological standards, described pressure refers to absolute pressure.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, obtain good swelling effect, 1% the time that requires pressure to drop to modifier pressure from modifier pressure is less than or equal to 5.0 seconds and gets final product, at 1 second～5 seconds, be advisable, therefore the moment of described release pressure is 1 second～5 seconds, and the rate of pressure reduction of corresponding described release pressure is 1MPa/s～4MPa/s.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, for obtaining good diffusivity and the best modified effect of modification medium, and the modifying process energy consumes minimum, the flow, time and the temperature that need ammoniacal liquor in regulation and control topping up process, reach the purpose of regulation and control pressure, and then regulation and control medium permeability, infiltration rate, evaporation rate, evaporation rate and phase transition process.And the process of boosting is one of most important influence factor, need adopt the different processes of boosting to different yarns, a large number of experiments show that: cotton/Flax/Viscose blended yarn is applicable to boosting by linearity, and rate of pressure rise k meets relational expression
wherein t is pressure rising time, k
0for initial rate of pressure rise; For cotton/Flax/Viscose blended yarn, initial rate of pressure rise k
0be not less than 0.5MPa/min, can reach 1MPa/min.So described initial rate of pressure rise k
0in 0.5MPa/min～1MPa/min scope.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, in modifying process, rear pressurize a period of time of boosting is for the modification medium can be penetrated in the yarn institutional framework more fully, better completes the intermolecular hydrogen bond network reconstruct of yarn fibers.This process is all necessary to the crystalline substance change modification of all yarns.To cotton/Flax/Viscose blended yarn, the rear pressurize 1min that boosts is above to be got final product, and the dwell time is advisable at 1～10min, and therefore the described rear dwell time of boosting is 1～10min.
The crystalline substance of a kind of cotton as above/Flax/Viscose blended yarn becomes method of modifying, after twice reconstruct of the intermolecular hydrogen bond network of yarn, remove the modification medium technical process that is absolutely necessary, this process does not affect the lattice structure of yarn, but how high efficiency, low energy consumption, this process that completes pollution-free, zero-emission are to realize the key factor of large-scale industrial production, this will directly affect the brilliant vitality that becomes method of modifying, about how high efficiency, low energy consumption, pollution-free, zero-emission complete this process again separate case write the series of patents statement.Remove the modification medium described in this case and remove the modification medium in cotton/Flax/Viscose blended yarn for adopting heating and vacuumizing parallel method of evaporating.
Beneficial effect:
The present invention adopts the advantage of above technical scheme as follows:
1. the present invention reaches the modification purpose by changing crystal structure.Yarn after modification overcomes its native defect, and hole increases, degree of crystallinity reduces, soft yarns, has improved DIMENSIONAL STABILITY, flexibility, level-dyeing property and the dyeability etc. of product.
2. the present invention adopts the method for abrupt release pressure, makes the maximum swelling of yarn after modification dodge quick-fried, and softness is good, wrinkle resistant nonshrink, durable fluffy, has significantly improved the spinning of yarn, knits, the metachromia energy, becomes the remarkable material that newly spins.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment only are not used in and limit the scope of the invention for the present invention is described.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
The crystalline substance of a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, by blending rate, is the 2:2:96(mass ratio) 10 cottons/Flax/Viscose blended yarn be placed in closed container, be filled with liquefied ammonia, by linear boosting mode, boost, rate of pressure rise k meets relational expression
initial rate of pressure rise k
0for 0.5MPa/min, boost to modifier pressure 0.5Mpa, pressurize 1min, then in 5 seconds with the rate of pressure reduction abrupt release of 1MPa/s to 0.005Mpa.Then adopt heating and vavuum pump to vacuumize parallel method of evaporating and remove the modification medium, until in closed container, pressure is reduced to 133Pa, now obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.The described brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn is compared with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, and hole increases 14%, and degree of crystallinity reduces 20%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 25%, and COLOR FASTNESS improves 20%.
Embodiment 2
The crystalline substance of a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, by blending rate, is the 94:2:4(mass ratio) 32 cottons/Flax/Viscose blended yarn be placed in closed container, be filled with liquefied ammonia, by linear boosting mode, boost, rate of pressure rise k meets relational expression
initial rate of pressure rise k
0for 0.5MPa/min, boost to modifier pressure 1Mpa, pressurize 5min, then in 3 seconds with the rate of pressure reduction abrupt release of 1MPa/s to 0.001Mpa.Then adopt heating and vavuum pump to vacuumize parallel method of evaporating and remove the modification medium, until in closed container, pressure is reduced to 133Pa, now obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.The described brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn is compared with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, and hole increases 15%, and degree of crystallinity reduces 22%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 26%, and COLOR FASTNESS improves 20%.
Embodiment 3
The crystalline substance of a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, by blending rate, is the 49:50:1(mass ratio) 90 cottons/Flax/Viscose blended yarn be placed in closed container, be filled with liquefied ammonia, by linear boosting mode, boost, rate of pressure rise k meets relational expression
initial rate of pressure rise k
0for 0.8MPa/min, boost to modifier pressure 1.5Mpa,, pressurize 10min, then in 1 second with the rate of pressure reduction abrupt release of 3MPa/s to 0.0015Mpa.Then adopt heating and vavuum pump to vacuumize parallel method of evaporating and remove the modification medium, until in closed container, pressure is reduced to 133Pa, now obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.The described brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn is compared with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, and hole increases 16%, and degree of crystallinity reduces 26%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 27%, and COLOR FASTNESS improves 23%.
Embodiment 4
The crystalline substance of a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, by blending rate, is the 10:80:10(mass ratio) 36 cottons/Flax/Viscose blended yarn be placed in closed container, be filled with liquefied ammonia, by linear boosting mode, boost, rate of pressure rise k meets relational expression
initial rate of pressure rise k
0for 0.8MPa/min, boost to modifier pressure 1.6Mpa, pressurize 8min, then in 2 seconds with the rate of pressure reduction abrupt release of 2MPa/s to 0.0016Mpa.Then adopt heating and vavuum pump to vacuumize parallel method of evaporating and remove the modification medium, until in closed container, pressure is reduced to 133Pa, now obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.The described brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn is compared with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, and hole increases 15%, and degree of crystallinity reduces 23%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 29%, and COLOR FASTNESS improves 21%.
Embodiment 5
The crystalline substance of a kind of cotton/Flax/Viscose blended yarn becomes method of modifying, by blending rate, is the 2:94:4(mass ratio) 90 cottons/Flax/Viscose blended yarn be placed in closed container, be filled with liquefied ammonia, by linear boosting mode, boost, rate of pressure rise k meets relational expression
initial rate of pressure rise k
0for 1MPa/min, boost to modifier pressure 1.8Mpa,, pressurize 10min, then in 1 second with the rate of pressure reduction abrupt release of 4MPa/s to 0.0018Mpa.Then adopt heating and vavuum pump to vacuumize parallel method of evaporating and remove the modification medium, until in closed container, pressure is reduced to 133Pa, now obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.The described brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn is compared with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, and hole increases 17%, and degree of crystallinity reduces 26%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 34%, and COLOR FASTNESS improves 23%.
Claims (10)
1. the crystalline substance of cotton/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that: cotton/Flax/Viscose blended yarn is placed in to closed container, be filled with the modification medium, boost to modifier pressure, then abrupt release pressure, remove the modification medium, obtain the brilliant modification cotton/Flax/Viscose blended yarn that becomes.
2. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, the fineness of described cotton/Flax/Viscose blended yarn is 10～90, blending rate is in mass ratio for being A:B:C=2～94:94～2:(100-A-B in mass ratio), and A+B<100.
3. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, the described brilliant microcosmic lattice that becomes modification cotton/Flax/Viscose blended yarn is compared with the microcosmic lattice of described cotton/Flax/Viscose blended yarn, hole increases 14%～17%, and degree of crystallinity reduces 20～26%; The described brilliant modification cotton/Flax/Viscose blended yarn that becomes is compared with described cotton/Flax/Viscose blended yarn, and dye-uptake improves 25%～34%, and COLOR FASTNESS improves 20%～23%.
4. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, described modification medium is liquefied ammonia.
5. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, described modifier pressure P is 0.5～1.8MPa, described abrupt release pressure refer to pressure moment drop to described modifier pressure 1% and below.
6. the crystalline substance of a kind of cotton according to claim 5/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, described pressure is absolute pressure.
7. the crystalline substance of a kind of cotton/Flax/Viscose blended yarn becomes method of modifying according to claim 1 or 5, it is characterized in that, and described moment refers to 1 second～5 seconds, the rate of pressure reduction of described release pressure is 1MPa/s～4MPa/s.
8. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, described boosting boosted for linearity, and rate of pressure rise k meets relational expression
wherein t is pressure rising time, k
0for initial rate of pressure rise; k
0in 0.5MPa/min～1MPa/min scope.
9. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, rear maintenance 1min～10min boosts.
10. the crystalline substance of a kind of cotton according to claim 1/Flax/Viscose blended yarn becomes method of modifying, it is characterized in that, described removal modification medium is removed the modification medium in cotton/Flax/Viscose blended yarn for adopting heating and vacuumizing parallel method of evaporating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310320654.8A CN103437156B (en) | 2013-07-26 | 2013-07-26 | Crystal variation modification method of cotton/flax/viscose blended yarn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310320654.8A CN103437156B (en) | 2013-07-26 | 2013-07-26 | Crystal variation modification method of cotton/flax/viscose blended yarn |
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| Publication Number | Publication Date |
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| CN103437156A true CN103437156A (en) | 2013-12-11 |
| CN103437156B CN103437156B (en) | 2015-06-24 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839508A (en) * | 2012-09-06 | 2012-12-26 | 东华大学 | High-grade flax fabric weaving method based on crystallized and modified flax yarns |
| CN103161046A (en) * | 2012-12-28 | 2013-06-19 | 东华大学 | Natural fiber crystal variation modified liquid medium filling and recovery system and method based on paralleled multiple buses and multiple modified kettles |
-
2013
- 2013-07-26 CN CN201310320654.8A patent/CN103437156B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839508A (en) * | 2012-09-06 | 2012-12-26 | 东华大学 | High-grade flax fabric weaving method based on crystallized and modified flax yarns |
| CN103161046A (en) * | 2012-12-28 | 2013-06-19 | 东华大学 | Natural fiber crystal variation modified liquid medium filling and recovery system and method based on paralleled multiple buses and multiple modified kettles |
Non-Patent Citations (3)
| Title |
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| 吴君南等: "闪爆处理对大麻纤维结构与性能的影响", 《纺织学报》 * |
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