CN103422284B - The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying - Google Patents
The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying Download PDFInfo
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- CN103422284B CN103422284B CN201310318081.5A CN201310318081A CN103422284B CN 103422284 B CN103422284 B CN 103422284B CN 201310318081 A CN201310318081 A CN 201310318081A CN 103422284 B CN103422284 B CN 103422284B
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Abstract
The crystalline substance that the present invention relates to a kind of cotton/flax MIXED FABRIC becomes method of modifying, is that cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC.The present invention adopts the advantage of above technical scheme as follows: 1, reach modification object by changing lattice structure, modified fabric overcomes its native defect, hole increases, degree of crystallinity reduces, fabric sofetening, improves the DIMENSIONAL STABILITY of product, flexibility and dyeability etc.2, adopt the method for abrupt release pressure, modified fabric farthest expanded, significantly improves bulkiness and the flexibility of fabric, thus significantly improve the spinning of fabric, knit, metachromia energy.
Description
Technical field
The crystalline substance that the present invention relates to a kind of cotton/flax MIXED FABRIC becomes method of modifying, specifically a kind of by modification medium being pressurized to modifier pressure and the cotton/flax MIXED FABRIC brilliant change method of modifying of abrupt release pressure after pressurize a period of time.
Background technology
Cotton/flax MIXED FABRIC is interwoven by cotton and linen thread and yarn, interweaves and cotton and linen thread and yarn is formed have complementary advantages, both improved hard, the easy wrinkle resistance of flax, maintained again the moisture permeability that it is good.But due to stiffening, scratchy, the shortcoming such as difficulty is spun, difficulty is knitted, difficulty contaminates of flax, also there is above shortcoming in the cotton woven/flax MIXED FABRIC.
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 fabric 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 closed container, the conventional boosting-pressurize-method of modification medium in fabric that reclaims again has certain effect to COTTON FABRIC, but it is poor to the modified effect of cotton/flax MIXED FABRIC, and the method for once modification, 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 cotton/flax MIXED FABRIC becomes method of modifying, specifically a kind of by modification medium being pressurized to modifier pressure and the cotton/flax MIXED FABRIC brilliant change method of modifying of abrupt release pressure after pressurize a period of time.
The crystalline substance of a kind of cotton/flax MIXED FABRIC of the present invention becomes method of modifying, is that cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC.Its principle is: cotton/flax MIXED FABRIC 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 fabric tissue preferably, the intermolecular hydrogen bond network of reconstruct fabric fibre element, change the microstructure of fabric, the motion of aggravation fabric fibre element macromolecular chain segment, make the intermolecular generation swelling action of fabric fibre element, hole increases, degree of crystallinity reduces, and achieves the once regulation and control of textile 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 with outside in fabric tissue inside, form high speed quick-fried swollen, the diffusion coefficient of modification medium significantly improved, the intermolecular hydrogen bond network of Perfect Reconstruction fabric fibre element, the intermolecular swelling action of fabric fibre element is more thorough, hole increases obviously, and degree of crystallinity significantly reduces, and achieves the secondary regulation and control of textile lattice structure.Finally adopt heating and vacuumize the parallel method of evaporating modification medium removed in cotton/flax MIXED FABRIC and namely complete described crystalline substance change method of modifying.Brilliant become modified cotton/flax MIXED FABRIC to have softness excellent, wrinkle resistant nonshrink, durable fluffy, significantly improve the spinning of fabric, knit, metachromia energy.
As preferred technical scheme:
The crystalline substance of a kind of cotton/flax MIXED FABRIC as above becomes method of modifying, and in described cotton/flax MIXED FABRIC, cotton fineness is 5 ~ 100, and the fineness of linen thread and yarn is 5 ~ 120; The thread count of described cotton/flax MIXED FABRIC is 50 ~ 800/10cm.
The crystalline substance of a kind of cotton/flax MIXED FABRIC as above becomes method of modifying, by twice intermolecular hydrogen bond network of reconstruct fabric fibre element, achieve the secondary regulation and control of textile lattice structure, make the intermolecular swelling action of fabric fibre 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 cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC compared with the microcosmic lattice of described cotton/flax MIXED FABRIC, hole increases 17% ~ 20%, and degree of crystallinity reduces 23% ~ 30%; Described crystalline substance becomes modification cotton/flax MIXED FABRIC compared with described cotton/flax MIXED FABRIC, and dye-uptake improves 30% ~ 45%, and COLOR FASTNESS improves 18% ~ 25%.
The crystalline substance of a kind of cotton/flax MIXED FABRIC 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) form a large amount of hydrogen bonds between energy and fabric fibre element, the intermolecular hydrogen bond network of reconstruct fabric fibre element, improves the swelling behavior of fabric; 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 cotton/flax MIXED FABRIC as above becomes method of modifying, modifier pressure abrupt release, produces larger pressure differential instantaneously, significantly can improve the diffusion coefficient of modification medium, cotton/flax MIXED FABRIC being produced fully swelling, is the brilliant critical process process becoming modification.To different cottons/flax MIXED FABRIC, 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 cotton/flax MIXED FABRIC, modifier pressure needs to be more than or equal to 0.5MPa, can reach 2.5MPa, and therefore described modifier pressure P should be 0.5 ~ 2.5MPa.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 cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC 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 1.5MPa/s ~ 4MPa/s.
The crystalline substance of a kind of cotton/flax MIXED FABRIC 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 fabrics, a large number of experiments show that: cotton/flax MIXED FABRIC is applicable to linear boosting, and rate of pressure rise k meets relational expression
wherein t is pressure rising time, k
0for initial boost speed; For cotton/flax MIXED FABRIC, initial boost speed k
0be not less than 0.5MPa/min, can 1.5MPa/min be reached, therefore described initial boost speed k
0within the scope of 0.5MPa/min ~ 1.5MPa/min.
The crystalline substance of a kind of cotton/flax MIXED FABRIC as above becomes method of modifying, in modifying process, after boosting, pressurize a period of time is to make modification medium penetrate in fabric structure more fully, better completes the intermolecular hydrogen bond network reconstruct of fabric fibre element.It is all necessary that this process becomes modification to the crystalline substance of all fabrics.To cotton/flax MIXED FABRIC, 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 cotton/flax MIXED FABRIC as above becomes method of modifying, after twice reconstruct of the fabric fibre intermolecular hydrogen bond network of element, remove modification medium to be absolutely necessary technical process, this process does not affect the lattice structure of fabric, 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 cotton/flax MIXED FABRIC.
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.Modified fabric overcomes its native defect, and hole increases, degree of crystallinity reduces, fabric sofetening, 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 fabric quick-fried, and softness is excellent, wrinkle resistant nonshrink, durable fluffy, significantly improves the spinning of fabric, knits, metachromia energy.
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
The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying, 150 that warp-wise 5 cottons and broadwise 5 count linen yarn line are interwoven/10cm × 50 piece/10cm cotton/flax MIXED FABRIC is placed in closed container, be filled with liquefied ammonia, linearly boosting mode boosting, rate of pressure rise k meets relational expression
initial boost speed 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 1.5MPa/s to 0.005Mpa, then adopt heating and vacuumize parallel method of evaporating and remove modification medium, namely obtain crystalline substance and become modification cotton/flax MIXED FABRIC.Described crystalline substance becomes the microcosmic lattice of modification cotton/flax MIXED FABRIC compared with the microcosmic lattice of described cotton/flax MIXED FABRIC, and hole increases 17%, and degree of crystallinity reduces 23%; Described crystalline substance becomes modification cotton/flax MIXED FABRIC compared with the described cotton that is modified/flax MIXED FABRIC, and dye-uptake improves 30%, and COLOR FASTNESS improves 18%.
Embodiment 2
The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying, 218 that warp-wise 30 cottons and broadwise 36 count linen yarn line are interwoven/10cm × 196 piece/10cm cotton/flax MIXED FABRIC is placed in closed container, be filled with liquefied ammonia, linearly boosting mode boosting, rate of pressure rise k meets relational expression
initial boost speed k
0for 0.8MPa/min, boost to modifier pressure 1Mpa, pressurize 5min, then in 5 seconds with the rate of pressure reduction abrupt release of 2MPa/s to 0.001Mpa, then the heating method of evaporating parallel with vacuum pump evacuation is adopted to remove modification medium, until pressure reduces to 133Pa in closed container, namely obtain brilliant change modification cotton/flax MIXED FABRIC.Described crystalline substance becomes the microcosmic lattice of modification cotton/flax MIXED FABRIC compared with the microcosmic lattice of described cotton/flax MIXED FABRIC, and hole increases 19%, and degree of crystallinity reduces 28%; Described crystalline substance becomes modification cotton/flax MIXED FABRIC compared with the described cotton that is modified/flax MIXED FABRIC, and dye-uptake improves 30%, and COLOR FASTNESS improves 18%.
Embodiment 3
The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying, 236 of warp-wise 21 count linen yarn line and broadwise 36 cotton yarns/10cm × 190 piece/10cm cotton/flax MIXED FABRIC is placed in closed container, be filled with liquefied ammonia, linearly boosting mode boosting, rate of pressure rise k meets relational expression
initial boost speed k
0for 1MPa/min, boost to modifier pressure 2Mpa, pressurize 5min, then in 4 seconds with the rate of pressure reduction abrupt release of 2MPa/s to 0.002Mpa, then the heating method of evaporating parallel with vacuum pump evacuation is adopted to remove modification medium, until pressure reduces to 133Pa in closed container, namely obtain brilliant change modification cotton/flax MIXED FABRIC.Described crystalline substance becomes the microcosmic lattice of modification cotton/flax MIXED FABRIC compared with the microcosmic lattice of described cotton/flax MIXED FABRIC, and hole increases 17%, and degree of crystallinity reduces 28%; Described crystalline substance becomes modification cotton/flax MIXED FABRIC compared with the described cotton that is modified/flax MIXED FABRIC, and dye-uptake improves 35%, and COLOR FASTNESS improves 20%.
Embodiment 4
The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying, 800 that warp-wise 100 cottons and broadwise 120 count linen yarn line are interwoven/10cm × 700 piece/10cm cotton/flax MIXED FABRIC is placed in closed container, be filled with liquefied ammonia, linearly boosting mode boosting, rate of pressure rise k meets relational expression
initial boost speed k
0for 1.5MPa/min, boost to modifier pressure 2.5Mpa, pressurize 10min, then in 3 seconds with the rate of pressure reduction abrupt release of 4MPa/s to 0.0025Mpa, then the heating method of evaporating parallel with vacuum pump evacuation is adopted to remove modification medium, until pressure reduces to 133Pa in closed container, namely obtain brilliant change modification cotton/flax MIXED FABRIC.Described crystalline substance becomes the microcosmic lattice of modification cotton/flax MIXED FABRIC compared with the microcosmic lattice of described cotton/flax MIXED FABRIC, and hole increases 20%, and degree of crystallinity reduces 30%; Described crystalline substance becomes modification cotton/flax MIXED FABRIC compared with the described cotton that is modified/flax MIXED FABRIC, and dye-uptake improves 45%, and COLOR FASTNESS improves 25%.
Claims (6)
1. the crystalline substance of cotton/flax MIXED FABRIC becomes a method of modifying, it is characterized in that: cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC; Described abrupt release pressure be finger pressure drop to instantaneously described modifier pressure 1% and following; Described modification medium is liquefied ammonia; Described modifier pressure P is 0.5 ~ 2.5MPa; Describedly refer to 3 seconds ~ 5 seconds instantaneously, the rate of pressure reduction of described release pressure is 1.5MPa/s ~ 4MPa/s; After boosting, the dwell time is 1 ~ 10min.
2. the crystalline substance of a kind of cotton/flax MIXED FABRIC according to claim 1 becomes method of modifying, and it is characterized in that, in described cotton/flax MIXED FABRIC, cotton fineness is 5 ~ 100, and the fineness of linen thread and yarn is 5 ~ 120; The thread count of described cotton/flax MIXED FABRIC is 50 ~ 800/10cm.
3. the crystalline substance of a kind of cotton/flax MIXED FABRIC according to claim 1 becomes method of modifying, it is characterized in that, described crystalline substance becomes the microcosmic lattice of modification cotton/flax MIXED FABRIC compared with the microcosmic lattice of described cotton/flax MIXED FABRIC, hole increases 17% ~ 20%, and degree of crystallinity reduces 23% ~ 30%; Described crystalline substance becomes modification cotton/flax MIXED FABRIC compared with described cotton/flax MIXED FABRIC, and dye-uptake improves 30% ~ 45%, and COLOR FASTNESS improves 18% ~ 25%.
4. the crystalline substance of a kind of cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC according to claim 1 becomes method of modifying, it is characterized in that, described boosting is linear boosting, and rate of pressure rise k meets relational expression
wherein t is pressure rising time, k
0for initial boost speed, k
0for 0.5MPa/min ~ 1.5MPa/min.
6. the crystalline substance of a kind of cotton/flax MIXED FABRIC 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 cotton/flax MIXED FABRIC.
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| CN201310318081.5A CN103422284B (en) | 2013-07-26 | 2013-07-26 | The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying |
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| CN201310318081.5A CN103422284B (en) | 2013-07-26 | 2013-07-26 | The crystalline substance of a kind of cotton/flax MIXED FABRIC becomes method of modifying |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413213A (en) * | 2007-10-19 | 2009-04-22 | 上海业安纺织科技有限责任公司 | Liquid ammonia modified method of cotton fibriia and yarn |
| 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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2013
- 2013-07-26 CN CN201310318081.5A patent/CN103422284B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413213A (en) * | 2007-10-19 | 2009-04-22 | 上海业安纺织科技有限责任公司 | Liquid ammonia modified method of cotton fibriia and yarn |
| 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 (1)
| Title |
|---|
| 闪爆处理对大麻纤维结构与性能的影响;吴君南等;《纺织学报》;20080415;第29卷(第04期);第14-17页 * |
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