CN111041650B - Preparation method of plaster lining cloth - Google Patents
Preparation method of plaster lining cloth Download PDFInfo
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- CN111041650B CN111041650B CN201911386337.XA CN201911386337A CN111041650B CN 111041650 B CN111041650 B CN 111041650B CN 201911386337 A CN201911386337 A CN 201911386337A CN 111041650 B CN111041650 B CN 111041650B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
- D01D5/23—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool by asymmetrical cooling of filaments, threads, or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Artificial Filaments (AREA)
- Woven Fabrics (AREA)
Abstract
The invention relates to a preparation method of plaster lining cloth, which takes trilobal CDP fiber as raw materials of warp and weft to carry out weaving and relaxation heat treatment to prepare the plaster lining cloth; wherein, the preparation process of the trilobal CDP fiber comprises the following steps: extruding CDP melt from trilobal spinneret orifices on a spinneret plate, cooling by adopting circular blowing, and preparing according to an FDY process; the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.0-1.4: 1.5-2.5, the three leaves are the same in width, the ratio of the length of the shortest leaf to the width of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the direction of the longest leaf is randomly distributed. The plaster lining cloth prepared by the invention has better air permeability because the warp yarn and weft yarn raw materials have better three-dimensional curling performance.
Description
Technical Field
The invention belongs to the technical field of medical and health products, and relates to a preparation method of plaster lining cloth.
Background
A medicinal plaster is prepared by refining medicinal materials, edible vegetable oil and red lead into a plaster material, and spreading the plaster material on plaster cloth to prepare an external preparation, which is used for a skin surface thin plaster, can promote the stagnation and the stagnation to directly reach the affected part, can permeate into the skin to generate the effects of diminishing inflammation, relieving pain, promoting blood circulation to remove blood stasis, tonifying qi and nourishing blood, clearing and activating the channels and collaterals, strengthening the muscles and bones, relaxing tendons and activating the collaterals, inducing resuscitation and penetrating the bones, dispelling wind and removing cold and the like.
The plaster carrier is made of paper, leather or cotton cloth, but a lot of ointment easily seeps out, dirties clothes and wastes ointment, and for the ointment which needs to be moisturized at any time or keep moisture, the ointment is easily dried in the application process, the drug effect is reduced, and the plaster carriers made of other materials are gradually replaced by non-woven fabrics along with the development of industrialization. Since the PP non-woven fabric has moisture absorption resistance, acid and alkali corrosion resistance and dissolution resistance and can better lock water, the main component of most plaster patches at present is PP. However, the plaster is often stuck on the affected part for a long time, so that the patient easily feels that the local skin is too tight and the activity is limited, and the local skin is easy to sweat and generate heat due to the airtight reason, so that the absorption of the medicine is influenced, and the skin is allergic and causes red swelling.
Therefore, it is necessary to prepare a plaster backing having good air permeability.
Disclosure of Invention
The invention provides a preparation method of plaster lining cloth, and aims to solve the problem of poor air permeability of plaster lining cloth in the prior art.
In order to achieve the purpose, the invention adopts the following scheme:
a plaster lining cloth is prepared by weaving trilobal CDP fiber as warp and weft and relaxation heat treatment;
the trilobal CDP fiber was prepared as follows:
extruding CDP melt from a trefoil spinneret orifice on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.0-1.4: 1.5-2.5, the three leaves are the same in width, the ratio of the length of the shortest leaf to the width of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
all the trilobal spinneret orifices are distributed in concentric circles, and the direction of the longest leaf is randomly distributed;
namely, a plurality of trilobal spinneret orifices are arranged on a spinneret plate, each trilobal spinneret orifice comprises a leaf I, a leaf II and a leaf III, the leaf I in different trilobal spinneret orifices is the shortest leaf in the three leaves, and the leaf III is the longest leaf in the three leaves; the length ratio of the leaves I, the leaves II and the leaves III in the same trilobal spinneret orifice is 1.0: 1.0-1.4: 1.5-2.5, the widths of the leaves I, the leaves II and the leaves III in the same trilobal spinneret orifice are the same, and the length ratio of the leaves I in the same trilobal spinneret orifice to the width ratio is 2.5-3.5: 1; in the same trilobal spinneret orifice, the included angle between the central lines of the blades I and II is 120 degrees, the included angle between the central lines of the blades II and III is 120 degrees, and the included angle between the central lines of the blades I and III is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the center lines of the blades III of all the trilobal spinneret orifices pass through the circle center, and in the same trilobal spinneret orifice, the distances between the blade III and the circle center are smaller relative to the distances between the blades I and II.
The principle of the invention is as follows:
the invention uses trilobal CDP fiber as warp and weft raw materials to weave and relax the heat treatment to make plaster lining cloth, the trilobal CDP fiber of the invention is FDY drawn yarn with trilobal and unequal trilobal length of cross section, extrude CDP melt from trilobal spinneret orifices with unequal trilobal length on the same spinneret plate, the center line of the longest leaf of the trilobal spinneret orifice passes through the centre of a circle, and point to the centre of a circle, adopt the circular blow air cooling at the same time, the trilobal cooling condition is seriously asymmetric, unbalanced, make the fiber spray out, the cooling rate of the melt of different positions on the cross section is inconsistent, the main body is: during spinning, the cooling air speed is high and is between 1.80 and 2.30m/s, the part close to the air blowing port is cooled earlier and faster, and the part far away from the air blowing port is cooled slower. When one of the trilobes in the trilobe spinneret orifice is facing the cooling wind, the melt of that lobe cools faster, while the rest of the trilobe cools slower. Under the tension of drawing, other parts in the trilobal shape are more easily drawn to be thin and have more concentrated stress, so that a trilobal stress asymmetric structure can be formed on a fiber trefoil cross section, the fiber with asymmetric stress on the cross section can show three-dimensional curling performance in the heat treatment or drawing process, the curling is good, and the elastic recovery rate of the fiber is high.
Because the trilobal CDP fiber has three-dimensional crimping performance and high filling power, the plaster lining cloth prepared from the trilobal CDP fiber greatly increases the air quantity passing through the cloth in unit area in unit time under a certain pressure condition, thereby effectively improving the air permeability.
In addition, as the trilobal spinneret orifices are distributed in concentric circles, and the direction of the longest leaf is randomly distributed, the cooling conditions of fibers extruded from different trilobal spinneret orifices have certain difference, the stress asymmetry condition on the cross section has certain difference, and the curling direction also has certain difference, and the existence of the differences can further improve the fluffy degree of the fibers and improve the air permeability of the plaster lining cloth.
As a preferred technical scheme:
according to the preparation method of the plaster lining cloth, the intrinsic viscosity of the CDP is 0.63-0.68 dL/g.
In the preparation method of the plaster lining cloth, the parameters of the FDY process are as follows: the spinning temperature is 280-285 ℃, the cooling temperature is 20-25 ℃, the cooling air speed is 1.80-2.30 m/s, the first roller speed is 3800-4000 m/min, the first roller temperature is 80-95 ℃, the two roller speed is 4200-4500 m/min, the two roller temperature is 150-170 ℃, and the winding speed is 4130-4410 m/min.
According to the preparation method of the plaster lining cloth, the mass ratio of the warp yarns to the weft yarns is 10: 8-10.
According to the preparation method of the plaster lining cloth, the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
According to the preparation method of the plaster lining cloth, before relaxation heat treatment, the trilobal CDP fiber has the breaking strength of 2.9-3.1 cN/dtex, the elongation at break of 50.0 +/-5.0% and the filament number of 0.7-1.0 dtex.
According to the preparation method of the plaster lining cloth, after relaxation heat treatment, the trilobal CDP fiber has a three-dimensional curling shape, the curling shrinkage rate is 21-25%, the curling stability is 77-81%, the contraction elongation is 53-58%, and the elastic recovery rate of curling is 75-80%.
In the preparation method of the plaster lining cloth, the gram weight of the plaster lining cloth is 50-70 g/m2The flow resistance is 0.09 to 0.13 KPa.s/m (measured by a KES-F8-AP1 air permeability tester, the flow resistance (R) represents the test result, and the smaller the R value, the better the air permeability).
Has the advantages that:
(1) the preparation method of the plaster lining cloth is simple and feasible, and has low cost;
(2) according to the preparation method of the plaster lining cloth, warp yarns and weft yarns are made of trilobal CDP fibers with good three-dimensional curling performance, and the prepared plaster lining cloth is good in air permeability.
Drawings
FIG. 1 is a schematic view of the trilobal spinneret orifice of the present invention;
FIG. 2 is a schematic representation of the distribution of trilobal orifices of the present invention on a spinneret.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The crimp shrinkage and crimp stability of the invention are obtained by testing the tow in GB6506-2001 synthetic fiber textured yarn crimp performance test method;
the method for testing the shrinkage elongation (reflecting the elasticity and the crimp degree of the deformed filament, the fiber is firstly loaded under light load and then loaded under heavy load, and the ratio of the length difference value under the two loads to the crimp length) and the crimp elastic recovery rate is as follows:
firstly, cutting two fiber samples with the length of about 50cm, putting the two fiber samples into hot water with the temperature of 100 ℃ for treatment for 30min, taking out the two fiber samples, naturally drying the two fiber samples, then cutting the sample with the length of about 30cm, fixing one end of the sample, loading a load of 0.0018cN/dtex on the other end of the sample, continuing for 30s, marking the sample at the position of 20cm, and obtaining the initial length l of the sample1(ii) a Then, the load of 0.09cN/dtex is loaded for 30s, and the position of the mark point is measured, namely the length l when the sample is loaded with heavy load2(ii) a Finally, removing the heavy load, retracting the sample for 2min without load, then adding the load of 0.0018cN/dtex, continuing for 30s, and measuring the position of the mark point on the scale, namely the recovery length l3(ii) a The percent elongation at Compression (CE) and the elastic recovery from crimp (SR) are calculated as follows:
CE＝(l2-l1)/l1；
SR＝(l2-l3)/(l2-l1)。
the trilobal spinneret orifices and the distribution of the trilobal spinneret orifices on the spinneret plate are shown in the attached drawings 1-2, the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.0-1.4: 1.5-2.5, the width of the three leaves is the same, the ratio of the length of the shortest leaf to the width of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; all the trilobal spinneret orifices are distributed in concentric circles, and the direction of the longest leaf is randomly distributed. The drawings are only schematic and should not be construed as limiting the invention.
Example 1
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with the intrinsic viscosity of 0.63dL/g from trefoil spinneret orifices on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.0:1.5, the width of the three leaves is the same, the length ratio of the shortest leaf to the width is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 24 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the included angles of inferior angles are 7 degrees, 60 degrees, 2 degrees, 30 degrees, 75 degrees, 15 degrees, 22 degrees, 90 degrees, 1 degree, 3 degrees, 170 degrees, 23 degrees, 43 degrees, 30 degrees, 10 degrees, 100 degrees, 106 degrees, 100 degrees, 41 degrees, 80 degrees, 65 degrees, 2 degrees and 26 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 280 ℃, the cooling temperature is 20 ℃, the cooling wind speed is 1.8m/s, the first roller speed is 3800m/min, the first roller temperature is 80 ℃, the second roller speed is 4200m/min, the second roller temperature is 4200 ℃, and the winding speed is 4130 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 8; the temperature of the relaxation heat treatment is 90 ℃ and the time is 20 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 2.9cN/dtex, the elongation at break is 55%, and the filament number is 0.7 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 21%, crimp stability of 77%, a reduction elongation of 53%, and a crimp elastic recovery of 75%;
the obtained plaster lining cloth has a gram weight of 50g/m2The flow resistance was 0.09KPa s/m.
Example 2
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with intrinsic viscosity of 0.65dL/g from trefoil spinneret orifices on a spinneret plate, cooling by circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.0:1.7, the width of the three leaves is the same, the ratio of the length of the shortest leaf to the width is 2.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 24 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the included angles of inferior angles are 7 degrees, 60 degrees, 2 degrees, 10 degrees, 108 degrees, 106 degrees, 100 degrees, 30 degrees, 75 degrees, 15 degrees, 22 degrees, 90 degrees, 1 degree, 3 degrees, 170 degrees, 23 degrees, 43 degrees, 30 degrees, 41 degrees, 80 degrees, 65 degrees, 2 degrees and 26 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 280 ℃, the cooling temperature is 20 ℃, the cooling air speed is 1.8m/s, the first-roller speed is 3822m/min, the first-roller temperature is 81 ℃, the second-roller speed is 4342m/min, the second-roller temperature is 4342 ℃, and the winding speed is 4148 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 10; the temperature of the relaxation heat treatment is 116 ℃, and the time is 27 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 2.9cN/dtex, the elongation at break is 53.9%, and the filament number is 0.71 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 22%, crimp stability of 81%, a reduction elongation of 57%, and a crimp elastic recovery of 78%;
the obtained plaster lining cloth has a gram weight of 63g/m2The flow resistance was 0.1KPa · s/m.
Example 3
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with the intrinsic viscosity of 0.66dL/g from a trefoil spinneret orifice on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.2:1.5, the width of the three leaves is the same, the length ratio of the shortest leaf to the width is 2.7:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 24 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the included angles of inferior angles are 80 degrees, 2 degrees, 97 degrees, 75 degrees, 15 degrees, 22 degrees, 90 degrees, 1 degrees, 3 degrees, 43 degrees, 30 degrees, 170 degrees, 23 degrees, 10 degrees, 100 degrees, 7 degrees, 106 degrees, 100 degrees, 41 degrees, 80 degrees, 65 degrees, 2 degrees and 26 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 280 ℃, the cooling temperature is 25 ℃, the cooling air speed is 1.8m/s, the speed of one roller is 3828m/min, the temperature of one roller is 83 ℃, the speed of two rollers is 4399m/min, the temperature of two rollers is 4399 ℃, and the winding speed is 4172 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 8; the temperature of the relaxation heat treatment is 107 ℃, and the time is 28 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 2.9cN/dtex, the elongation at break is 53.7 percent, and the filament number is 0.99 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 21%, crimp stability of 80%, a reduction elongation of 54%, and a crimp elastic recovery of 78%;
the obtained plaster lining cloth has a gram weight of 53g/m2The flow resistance was 0.11KPa · s/m.
Example 4
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with the intrinsic viscosity of 0.67dL/g from trefoil spinneret orifices on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.3:1.5, the width of the three leaves is the same, the ratio of the length of the shortest leaf to the width is 2.8:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 12 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the inferior angle included angles are 2 degrees, 30 degrees, 23 degrees, 43 degrees, 30 degrees, 100 degrees, 106 degrees, 100 degrees, 41 degrees, 2 degrees and 26 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 281 ℃, the cooling temperature is 22 ℃, the cooling air speed is 1.9m/s, the speed of one roller is 3912m/min, the temperature of one roller is 84 ℃, the speed of two rollers is 4422m/min, the temperature of two rollers is 4422 ℃, and the winding speed is 4261 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 10; the temperature of the relaxation heat treatment is 94 ℃, and the time is 21 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 3cN/dtex, the elongation at break is 52.6%, and the filament number is 0.86 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 24%, a crimp stability of 81%, a reduction elongation of 57%, and a crimp elastic recovery of 76%;
the obtained plaster lining cloth has a gram weight of 57g/m2The flow resistance was 0.12KPa · s/m.
Example 5
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with the intrinsic viscosity of 0.67dL/g from trefoil spinneret orifices on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.4:2.5, the width of the three leaves is the same, the length ratio of the shortest leaf to the width is 2.8:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 12 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the inferior angle included angles are 2 degrees, 30 degrees, 23 degrees, 43 degrees, 30 degrees, 100 degrees, 106 degrees, 100 degrees, 41 degrees, 2 degrees and 26 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 282 ℃, the cooling temperature is 23 ℃, the cooling air speed is 1.9m/s, the speed of one roller is 3926m/min, the temperature of one roller is 85 ℃, the speed of two rollers is 4424m/min, the temperature of two rollers is 4424 ℃, and the winding speed is 4343 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 9; the temperature of the relaxation heat treatment is 93 ℃, and the time is 27 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 3.1cN/dtex, the elongation at break is 52.1%, and the filament number is 0.79 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 21%, crimp stability of 80%, a reduction elongation of 56%, and a crimp elastic recovery of 80%;
the obtained plaster lining cloth has a gram weight of 57g/m2The flow resistance was 0.11KPa · s/m.
Example 6
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with the intrinsic viscosity of 0.67dL/g from trefoil spinneret orifices on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.4:2.0, the width of the three leaves is the same, the ratio of the length of the shortest leaf to the width is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 12 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the inferior angle included angles are 23 degrees, 65 degrees, 39 degrees, 102 degrees, 2 degrees, 30 degrees, 106 degrees, 100 degrees, 41 degrees, 2 degrees and 24 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 282 ℃, the cooling temperature is 25 ℃, the cooling air speed is 2.1m/s, the speed of one roller is 3966m/min, the temperature of one roller is 87 ℃, the speed of two rollers is 4484m/min, the temperature of two rollers is 4484 ℃, and the winding speed is 4346 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 9; the temperature of the relaxation heat treatment is 109 ℃, and the time is 27 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 3.1cN/dtex, the elongation at break is 49.3%, and the filament number is 0.7 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 23%, crimp stability of 81%, a reduction elongation of 58%, and a crimp elastic recovery of 76%;
the obtained plaster lining cloth has a gram weight of 60g/m2The flow resistance was 0.12KPa · s/m.
Example 7
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with intrinsic viscosity of 0.68dL/g from trefoil spinneret orifices on a spinneret plate, cooling by circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.2:1.5, the width of the three leaves is the same, the length ratio of the shortest leaf to the width is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 12 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the inferior angle included angles are 2 degrees, 30 degrees, 23 degrees, 43 degrees, 30 degrees, 100 degrees, 106 degrees, 100 degrees, 41 degrees, 2 degrees and 26 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 285 ℃, the cooling temperature is 25 ℃, the cooling air speed is 2.2m/s, the speed of one roller is 3980m/min, the temperature of one roller is 94 ℃, the speed of two rollers is 4495m/min, the temperature of two rollers is 4495 ℃, and the winding speed is 4404 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 10; the temperature of the relaxation heat treatment is 98 ℃, and the time is 20 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 3.1cN/dtex, the elongation at break is 49.3%, and the filament number is 0.8 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 25%, crimp stability of 79%, a reduction elongation of 53%, and a crimp elastic recovery of 75%;
the obtained plaster lining cloth has a gram weight of 61g/m2The flow resistance was 0.12KPa · s/m.
Example 8
A preparation method of plaster lining cloth comprises the following steps:
(1) preparation of trilobal CDP fiber:
extruding CDP melt with intrinsic viscosity of 0.68dL/g from trefoil spinneret orifices on a spinneret plate, cooling by circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of the three leaves of the same trilobal spinneret orifice is 1.0:1.0:2.5, the width of the three leaves is the same, the length ratio of the shortest leaf to the width is 3.5:1, and the included angle of the central lines of the two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size; the spinneret plate is provided with a circle of 12 trilobal spinneret orifices which are distributed at equal intervals, the central axis of the longest leaf of one trilobal spinneret orifice is taken as a datum line, the central axes of the longest leaves of all other trilobal spinneret orifices form certain included angles with the datum line, and the inferior angle included angles are 2 degrees, 30 degrees, 27 degrees, 26 degrees, 23 degrees, 43 degrees, 30 degrees, 100 degrees, 106 degrees, 120 degrees and 41 degrees in sequence along the clockwise direction;
the parameters of the FDY process are as follows: the spinning temperature is 285 ℃, the cooling temperature is 25 ℃, the cooling air speed is 2.3m/s, the first roller speed is 4000m/min, the first roller temperature is 95 ℃, the two roller speed is 4500m/min, the two roller temperature is 4500 ℃, and the winding speed is 4410 m/min;
(2) preparing plaster lining cloth:
carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth; wherein the mass ratio of the warp yarns to the weft yarns is 10: 10; the temperature of the relaxation heat treatment is 120 ℃, and the time is 30 min;
before relaxation heat treatment, the breaking strength of the prepared trilobal CDP fiber is 3.1cN/dtex, the elongation at break is 45%, and the filament number is 1.0 dtex; after relaxation heat treatment, the trilobal CDP fiber had a three-dimensional crimp morphology with a crimp contraction of 25%, crimp stability of 81%, a reduction elongation of 58%, and a crimp elastic recovery of 80%;
the obtained plaster lining cloth has a gram weight of 70g/m2The flow resistance was 0.13KPa · s/m.
Claims (8)
1. A preparation method of plaster lining cloth is characterized in that: carrying out weaving and relaxation heat treatment on trilobal CDP fibers serving as warp and weft raw materials to prepare plaster lining cloth, wherein the trilobal CDP fibers have a three-dimensional curling shape after the relaxation heat treatment;
the trilobal CDP fiber was prepared as follows:
extruding CDP melt from a trefoil spinneret orifice on a spinneret plate, cooling by adopting circular blowing, and preparing FDY filaments according to an FDY process to obtain trefoil CDP fibers;
the length ratio of three leaves of the same trilobal spinneret orifice is 1.0: 1.0-1.4: 1.5-2.5, the three leaves are the same in width, the ratio of the length of the shortest leaf to the width of the shortest leaf is 2.5-3.5: 1, and the included angle of the central lines of two adjacent leaves is 120 degrees; the three leaves of different trilobal spinneret orifices have the same shape and size;
all the trilobal spinneret orifices are distributed in concentric circles, and the direction of the longest leaf is randomly distributed;
the cooling air speed in the FDY process is 1.80-2.30 m/s.
2. A method of preparing a patch lining as claimed in claim 1, wherein the CDP has an intrinsic viscosity of 0.63 to 0.68 dL/g.
3. A method of manufacturing a plaster backing according to claim 2, wherein the parameters of the FDY process are: the spinning temperature is 280-285 ℃, the cooling temperature is 20-25 ℃, the first roller speed is 3800-4000 m/min, the first roller temperature is 80-95 ℃, the two roller speed is 4200-4500 m/min, the two roller temperature is 150-170 ℃, and the winding speed is 4130-4410 m/min.
4. A plaster lining cloth preparation method according to claim 1, wherein the mass ratio of warp yarn to weft yarn is 10: 8-10.
5. A method for preparing a plaster lining cloth according to claim 1, wherein the temperature of the relaxation heat treatment is 90 to 120 ℃ for 20 to 30 min.
6. A method for preparing a plaster lining cloth according to claim 5, wherein before the relaxation heat treatment, the trilobal CDP fiber has a breaking strength of 2.9-3.1 cN/dtex, an elongation at break of 50.0 ± 5.0%, and a single fiber fineness of 0.7-1.0 dtex.
7. A method for preparing a plaster lining cloth according to claim 5, wherein after the relaxation heat treatment, the trefoil CDP fiber has a crimp contraction rate of 21-25%, a crimp stability of 77-81%, a shrinkage elongation of 53-58%, and a crimp elastic recovery of 75-80%.
8. A method for preparing a plaster lining cloth according to claim 1, wherein the plaster lining cloth has a grammage of 50-70 g/m2The flow resistance is 0.09 to 0.13KPa · s/m.
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| CN1108939A (en) * | 1994-02-20 | 1995-09-27 | 郑红梅 | Baidujing plaster and its preparation method |
| CN201704440U (en) * | 2010-05-24 | 2011-01-12 | 江苏华亚化纤有限公司 | Three-bladed special-shaped spinneret plate |
| CN103120609A (en) * | 2012-11-29 | 2013-05-29 | 昆山杰明纺织品有限公司 | Cloth for ointment |
| CN205501463U (en) * | 2016-04-13 | 2016-08-24 | 浦江鑫远喷丝板有限公司 | Three leaves of length dysmorphism high accuracy spinneret |
| CN106400166B (en) * | 2016-08-31 | 2018-10-30 | 江苏恒力化纤股份有限公司 | A kind of three leaf special-shaped polyester fiber of porous superbright light and preparation method thereof |
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