CN103437148B - A kind of crystalline substance of viscose yarn becomes method of modifying - Google Patents
A kind of crystalline substance of viscose yarn becomes method of modifying Download PDFInfo
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- CN103437148B CN103437148B CN201310318061.8A CN201310318061A CN103437148B CN 103437148 B CN103437148 B CN 103437148B CN 201310318061 A CN201310318061 A CN 201310318061A CN 103437148 B CN103437148 B CN 103437148B
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Abstract
The crystalline substance that the present invention relates to a kind of viscose yarn becomes method of modifying, is that viscose yarn is placed in closed container, is filled with modification medium, boosts to modifier pressure, then abrupt release pressure, removes modification medium, namely obtains brilliant change modification viscose yarn.The present invention adopts the advantage of above technical scheme as follows: 1, reach modification object by changing lattice structure, modified yarn overcomes its native defect, hole increases, degree of crystallinity reduces, soft yarns, improves the DIMENSIONAL STABILITY of product, flexibility and dyeability etc.2, adopt the method for abrupt release pressure, modified yarn farthest expanded, significantly improves bulkiness and the flexibility of yarn, thus significantly improve the spinning of yarn, knit, metachromia energy.
Description
Technical field
The crystalline substance that the present invention relates to a kind of viscose yarn becomes method of modifying, specifically a kind of by modification medium being pressurized to modifier pressure and the viscose yarn of abrupt release pressure brilliant change method of modifying after pressurize a period of time.
Background technology
The soft good luster of viscose yarn, hygroscopicity, gas permeability and dyeability are good, but because elasticity is poor, the easy fold of fabric and not easily the weakness such as recovery constrain its development.
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.Physical modification method mainly comprises discharge technology modification, high steam dodges quick-fried modification, ultrasonic cavitation and microwave irradiation modification, liquefied ammonia are processing modified etc.Chemical modification method mainly comprises esters modification, ethers modification, graft modification and cross-linking modified etc.
The method of modifying having 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 process has similar effect, as features such as natural crimp disappearance, cross section change circle, inner chamber diminish, but the residual alkali lye of alkali mercerized modification is not easily removed and yarn also can be caused 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 modification medium, in the collect yarn of conventional boosting-pressurize in closed container-again, the method for modification medium has certain effect to viscose yarn, but 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 object of this invention is to provide a kind of viscose yarn becomes method of modifying, specifically a kind of by modification medium being pressurized to modifier pressure and the viscose yarn of abrupt release pressure brilliant change method of modifying after pressurize a period of time.
The crystalline substance of a kind of viscose yarn of the present invention becomes method of modifying, is that viscose yarn is placed in closed container, is filled with modification medium, boosts to modifier pressure, then abrupt release pressure, removes modification medium, namely obtains brilliant change modification viscose yarn.Its principle is: viscose yarn is placed in closed container, and this closed container can movable sealing under under high pressure movable sealing and negative pressure, and zero leakage.By pressure balance topping up and non-equilibrium constant speed topping up, adjustable be filled with modification medium in closed container flow, time and temperature, thus the rate of change of the regulation and control pressure of modification, two-phase interface and above-mentioned parameter, and then the running parameter such as the permeability of regulation and control liquid medium, infiltration rate and evaporation rate; Regulate the dwell time of modifier pressure simultaneously; Above-mentioned technique can make the diffusion coefficient of modification medium improve, modification medium penetrates in yarn tissue preferably, the intermolecular hydrogen bond network of reconstruct yarn fibers, change the microstructure of yarn fibers, the motion of aggravation macromolecular chain segment, make the intermolecular generation swelling action of yarn fibers, hole increases, degree of crystallinity reduces, and achieves the once regulation and control of yarn lattice structure.Again by high speed overflow, a large amount of liquid modified medium in abrupt release closed container, huge pressure reduction is produced instantaneously at yarn organization internal and outside, form high speed quick-fried swollen, the diffusion coefficient of modification medium is significantly improved, Perfect Reconstruction yarn fibers intermolecular hydrogen bond network, the intermolecular swelling action of yarn fibers is more thorough, hole increases obviously, and degree of crystallinity significantly reduces, and achieves the secondary regulation and control of yarn lattice structure.Finally adopt heating and vacuumize the parallel method of evaporating modification medium removed in viscose yarn and namely complete described crystalline substance change method of modifying.Brilliant become modified viscose yarn to have softness excellent, wrinkle resistant nonshrink, durable fluffy, significantly improve the spinning of yarn, knit, metachromia energy, become remarkable and newly spin material.
As preferred technical scheme:
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, and the fineness of described viscose yarn is 10 ~ 90.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, by twice intermolecular hydrogen bond network of reconstruct yarn fibers, achieve the secondary regulation and control of yarn lattice structure, 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 heating and vacuumize the parallel method of evaporating modification medium removed in viscose yarn namely to complete described crystalline substance change modification.Crystalline substance described in employing becomes method of modifying, and can make the microcosmic lattice of brilliant change modification viscose yarn compared with the microcosmic lattice of described viscose yarn, hole increases 8% ~ 11%, and degree of crystallinity reduces 10% ~ 20%; Described crystalline substance becomes modification viscose yarn compared with described viscose yarn, and dye-uptake improves 18% ~ 22%, and COLOR FASTNESS improves 15% ~ 21%.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, and modification medium is liquefied ammonia; Modification medium need possess following three point patterns: 1) have excellent 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, improves the swelling behavior of yarn; 3) be easy to phase transformation regulation and control, be convenient to modification medium evaporation and reclaim.And liquefied ammonia has, and molecular weight is little, viscosity is little, surface tension is little, be easy to the special physical property such as phase transformation, these special natures make liquefied ammonia meet above-mentioned three features.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, and modifier pressure abrupt release, produces larger pressure differential instantaneously, significantly can improve the diffusion coefficient of modification medium, viscose yarn is produced fully swelling, is the brilliant critical process process becoming modification.To different viscose yarn, the modifier pressure of requirement is different, and the speed of earth pressure release is different, and the pressure differential produced instantaneously is different, under the prerequisite not improving modifier pressure, obtain release pressure high as far as possible poor, modifier pressure should be made to drop to negative pressure.To viscose yarn, modifier pressure needs to be more than or equal to 0.5MPa, can reach 1.2MPa.Therefore described modifier pressure should be 0.5 ~ 1.2MPa.Poor for obtaining high as far as possible release pressure, modifier pressure should be made to drop to negative pressure, therefore the abrupt release of modifier pressure, require modifier pressure drop to instantaneously modifier pressure 1% and below.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, and in order to specification technological standards, described pressure refers to absolute pressure.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, obtain excellent swelling effect, require that the time that pressure drops to 1% of modifier pressure from modifier pressure is less than or equal to 5.0 seconds, be advisable at 3 seconds ~ 5 seconds, therefore the moment of described release pressure is 3 seconds ~ 5 seconds, and the rate of pressure reduction of corresponding described release pressure is 0.3MPa/s ~ 0.5MPa/s.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, for obtaining the good diffusivity of modification medium and best modified effect, and modifying process energy ezpenditure is minimum, need to regulate and control the flow of ammoniacal liquor in filling process, time and temperature, reach the object of regulation and control pressure, and then regulation and control medium permeability, infiltration rate, evaporation rate, evaporation rate and phase transition process.And boost process is one of most important influence factor, different boost process need be adopted to different yarns, a large number of experiments show that: viscose yarn uniform texture, be applicable to using constant speed boosting mode, the constant speed rate of pressure rise of viscose yarn is advisable at 0.2 ~ 0.4MPa/min.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, and in modifying process, after boosting, pressurize a period of time is to make modification medium can penetrate into more fully in yarn institutional framework, better completes the intermolecular hydrogen bond network reconstruct of yarn fibers.It is all necessary that this process becomes modification to the crystalline substance of all yarns.To viscose yarn, more than pressurize 1min after boosting, the dwell time is advisable at 1 ~ 10min, and therefore after described boosting, the dwell time is 1 ~ 10min.
The crystalline substance of a kind of viscose yarn as above becomes method of modifying, after twice reconstruct of the intermolecular hydrogen bond network of yarn, remove modification medium to be absolutely necessary technical process, this process does not affect the lattice structure of yarn, but how high efficiency, low energy consumption, this process that completes that is pollution-free, zero-emission are the key factors realizing large-scale industrial production, this directly will affect the brilliant vitality becoming method of modifying, high efficiency, low energy consumption, the completing this process and separate case will write series of patents statement again of pollution-free, zero-emission about how.Removing modification medium described in this case is the modification medium adopting heating and vacuumize in parallel method of evaporating removal viscose yarn.
Beneficial effect:
The present invention adopts the advantage of above technical scheme as follows:
1. the present invention reaches modification object by changing crystal structure.Yarn after modification overcomes its native defect, and hole increases, degree of crystallinity reduces, soft yarns, improves the DIMENSIONAL STABILITY of product, flexibility, level-dyeing property and dyeability etc.
2. the present invention adopts the method for abrupt release pressure, makes the maximum swelling sudden strain of a muscle of modified yarn quick-fried, and softness is excellent, wrinkle resistant nonshrink, durable fluffy, significantly improves the spinning of yarn, knits, metachromia energy, becomes remarkable and newly spins material.
Detailed description of the invention
Below in conjunction with detailed description of the invention, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
A kind of crystalline substance of viscose yarn becomes method of modifying, the viscose yarn of 10 is placed in closed container, is filled with liquefied ammonia, boost to modifier pressure 0.5Mpa by the rate of pressure rise constant speed of 0.2MPa/min, pressurize 1min, then in 5 seconds with the rate of pressure reduction abrupt release of 0.3MPa/s to 0.005Mpa.Then adopt the heating method of evaporating parallel with vacuum pump evacuation to remove modification medium, until pressure reduces to 133Pa in closed container, now namely acquisition is brilliant becomes modification viscose yarn.Described crystalline substance becomes the microcosmic lattice of modification viscose yarn compared with the microcosmic lattice of described viscose yarn, and hole increases 8%, and degree of crystallinity reduces 10%; Described crystalline substance becomes modification viscose yarn compared with described viscose yarn, and dye-uptake improves 18%, and COLOR FASTNESS improves 15%.
Embodiment 2
A kind of crystalline substance of viscose yarn becomes method of modifying, the viscose yarn of 32 is placed in closed container, is filled with liquefied ammonia, boost to modifier pressure 0.8Mpa by the rate of pressure rise constant speed of 0.2MPa/min, pressurize 5min, then in 4 seconds with the rate of pressure reduction abrupt release of 0.2MPa/s to 0.008Mpa.Then adopt the heating method of evaporating parallel with vacuum pump evacuation to remove modification medium, until Pressure Drop is to 133Pa in closed container, now namely acquisition is brilliant becomes modification viscose yarn.Described crystalline substance becomes the microcosmic lattice of modification viscose yarn compared with the microcosmic lattice of described viscose yarn, and hole increases 10%, and degree of crystallinity reduces 12%; Described crystalline substance becomes modification viscose yarn compared with described viscose yarn, and dye-uptake improves 19%, and COLOR FASTNESS improves 16%.
Embodiment 3
A kind of crystalline substance of viscose yarn becomes method of modifying, the viscose yarn of 80 is placed in closed container, is filled with liquefied ammonia, boost to modifier pressure 1Mpa by the rate of pressure rise constant speed of 0.3MPa/min, pressurize 5min, then in 4 seconds with the rate of pressure reduction abrupt release of 0.3MPa/s to 0.001Mpa.Then adopt the heating method of evaporating parallel with vacuum pump evacuation to remove modification medium, until the Pressure Drop in closed container is to 133Pa, now namely acquisition is brilliant becomes modification viscose yarn.Described crystalline substance becomes the microcosmic lattice of modification viscose yarn compared with the microcosmic lattice of described viscose yarn, and hole increases 10%, and degree of crystallinity reduces 15%; Described crystalline substance becomes modification viscose yarn compared with described viscose yarn, and dye-uptake improves 20%, and COLOR FASTNESS improves 16%.
Embodiment 4
A kind of crystalline substance of viscose yarn becomes method of modifying, the viscose yarn of 90 is placed in closed container, is filled with liquefied ammonia, boost to modifier pressure 1.2Mpa by the rate of pressure rise constant speed of 0.4MPa/min, pressurize 10min, then in 3 seconds with the rate of pressure reduction abrupt release of 0.5MPa/s to 0.012Mpa.Then adopt the heating method of evaporating parallel with vacuum pump evacuation to remove modification medium, until pressure reduces to 133Pa in closed container, now namely acquisition is brilliant becomes modification viscose yarn.Described crystalline substance becomes the microcosmic lattice of modification viscose yarn compared with the microcosmic lattice of described viscose yarn, and hole increases 11%, and degree of crystallinity reduces 20%; Described crystalline substance becomes modification viscose yarn compared with described viscose yarn, and dye-uptake improves 22%, and COLOR FASTNESS improves 21%.
Claims (6)
1. the crystalline substance of viscose yarn becomes a method of modifying, it is characterized in that: viscose yarn is placed in closed container, is filled with modification medium, boost to modifier pressure, then abrupt release pressure, removes modification medium, namely obtains brilliant change modification viscose yarn; Described modification medium is liquefied ammonia; Described modifier pressure is 0.5 ~ 1.2MPa, described abrupt release pressure be finger pressure drop to instantaneously described modifier pressure 1% and following; Describedly refer to 3 seconds ~ 5 seconds instantaneously, the rate of pressure reduction of described release pressure is 0.3MPa/s ~ 0.5MPa/s; 1min ~ 10min is kept after boosting.
2. the crystalline substance of a kind of viscose yarn according to claim 1 becomes method of modifying, and it is characterized in that, the fineness of described viscose yarn is 10 ~ 90.
3. the crystalline substance of a kind of viscose yarn according to claim 1 becomes method of modifying, it is characterized in that, described crystalline substance becomes the microcosmic lattice of modification viscose yarn compared with the microcosmic lattice of described viscose yarn, and hole increases 8% ~ 11%, and degree of crystallinity reduces 10% ~ 20%; Described crystalline substance becomes modification viscose yarn compared with described viscose yarn, and dye-uptake improves 18% ~ 22%, and COLOR FASTNESS improves 15% ~ 21%.
4. the crystalline substance of a kind of viscose yarn according to claim 1 becomes method of modifying, and it is characterized in that, described pressure is absolute pressure.
5. the crystalline substance of a kind of viscose yarn according to claim 1 becomes method of modifying, it is characterized in that, described boosting is constant speed boosting, and rate of pressure rise is 0.2MPa/min ~ 0.4MPa/min.
6. the crystalline substance of a kind of viscose yarn according to claim 1 becomes method of modifying, it is characterized in that, described removal modification medium is the modification medium adopting heating and vacuumize in parallel method of evaporating removal viscose yarn.
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| CN201310318061.8A CN103437148B (en) | 2013-07-26 | 2013-07-26 | A kind of crystalline substance of viscose yarn becomes method of modifying |
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| CN201310318061.8A CN103437148B (en) | 2013-07-26 | 2013-07-26 | A kind of crystalline substance of viscose yarn becomes method of modifying |
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| CN103437148B true CN103437148B (en) | 2016-01-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487141A (en) * | 2002-10-05 | 2004-04-07 | 郎金成 | Liquid ammonia treatment process for skein |
| 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 |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487141A (en) * | 2002-10-05 | 2004-04-07 | 郎金成 | Liquid ammonia treatment process for skein |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| "棉纤维蒸汽闪爆改性及其化学反应性能";邵自强等;《火炸药学报》;20010228(第1期);44-46 * |
| "棉麻纤维液氨改性成套设备控制系统设计";郑慧峰等;《东华大学学报(自然科学版)》;20081215;第34卷(第6期);723-727 * |
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Inventor after: Sun Yize Inventor after: Meng Chuo Inventor after: Ji Chengchang Inventor after: Huang Shuang Inventor after: Sun Zhijun Inventor before: Sun Yize Inventor before: Meng Chuo Inventor before: Huang Shuang Inventor before: Sun Zhijun |
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Free format text: CORRECT: INVENTOR; FROM: SUN YIZE MENG NAO HUANG SHUANG SUN ZHIJUN TO: SUN YIZE MENG NAO JI CHENGCHANG HUANG SHUANG SUN ZHIJUN |
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