CN111055611B - Preparation method of pen point of marker pen - Google Patents
Preparation method of pen point of marker pen Download PDFInfo
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- CN111055611B CN111055611B CN201911408639.2A CN201911408639A CN111055611B CN 111055611 B CN111055611 B CN 111055611B CN 201911408639 A CN201911408639 A CN 201911408639A CN 111055611 B CN111055611 B CN 111055611B
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- ring groove
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- melt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
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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
- D01D4/00—Spinnerette packs; Cleaning thereof
-
- 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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/06—Distributing spinning solution or melt to spinning nozzles
-
- 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
-
- 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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
Abstract
The invention relates to a preparation method of a pen point of a marker pen, which comprises the following steps: (1) washing and drying the pen point by using polyamide fiber; (2) dipping glue by adopting a double-component polyurethane adhesive; (3) preheating, curing and foaming the fiber bundle after gum dipping; (4) cutting and grinding the completely foamed fiber bar; (5) cleaning and drying to obtain the pen point of the mark pen; the preparation process of the polyamide fiber for the pen point comprises the following steps: according to the FDY process, after high/viscosity PA6 melt is distributed, FDY filaments are obtained by extrusion from spinneret orifices on the same spinneret plate, and relaxation heat treatment is carried out to obtain polyamide fibers for the pen point; the cross section of the spinneret orifice is
The shape is formed by a transverse line, and a slant line I and a slant line II which are connected with the transverse line; dispensing means controlling the flow of high viscosity PA6 melt through the cross-line while controlling the flow of low viscosity PA6 melt through slope I and slope II. The preparation method is simple, and the prepared marker pen point has better writing experience.
Description
Technical Field
The invention belongs to the technical field of fibers, and relates to a preparation method of a pen point of a marker pen.
Background
In recent years, synthetic fibers have found wide use in the pen industry. The international popular marker pen is a novel writing tool which uses nylon elastic yarns as pen points and polyester fibers as water storage cores. The mark pen has the advantages of smooth writing, uniform and full color, multiple ink color types, no dust during writing, capability of changing the width of handwriting at any time during writing, capability of wiping after writing and the like, and is widely applied to the fields of education, office work, drawing, industrial design and the like.
The mark pen mainly comprises four parts, including a pen head, a water storage core, ink and a plastic shell supporting part of the pen, which are matched properly to enable the mark pen to play a role. The pen point of the marker pen is generally made of fibers serving as main materials, the types of the fibers for making the pen point are various, and polyester fibers, polyamide fibers, polyacrylonitrile fibers and the like are common in the market. The manufacturing method of the fiber pen point comprises the steps of firstly, using a stranding machine to synthesize a strand of fluffy yarns, enabling the strand of fluffy yarns to be thermally bonded with a specific adhesive through a pen point forming machine, then using an oven to evaporate a solvent of the adhesive, then foaming the adhesive, and finally cutting a long rod of the foamed fiber pen point to a fixed length, performing surface abrasion and drying treatment to obtain a pen point finished product.
However, the writing experience of the pen point of the existing mark pen is still poor, and people cannot meet the use requirements of high-grade mark pen products.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the mark pen point with better writing experience.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a pen point of a marker pen comprises the following steps:
washing the pen point with polyamide fiber (washing with deionized water at 20-30 ℃) and drying (drying in an oven at 60-70 ℃ for 4-5 hours);
dipping glue by using a two-component polyurethane adhesive (the mass ratio of a soft segment component to a hard segment component in the two-component polyurethane adhesive is 1: 1.2-1.7) (the time is 1.5-2 min);
preheating the fiber bundle after gum dipping (the temperature is 85-90 ℃ for 5-10 min) and curing and foaming (the temperature is 100-120 ℃ for 10-15 min);
cutting (the cutting length is 50mm) and grinding (the grinding steps are 1) the completely foamed fiber bar;
cleaning (by adopting a surfactant solution with the concentration of 0.5 wt%, wherein the surfactant is TX-10, BYK-1711 or BYK-2015) and drying (at the temperature of 60-70 ℃ for 10-12 h) to obtain a pen point of the marker pen;
the monofilament titer of the polyamide fiber for the pen point is 1.0-1.5 dtex, and the preparation process is as follows:
according to the FDY process, after the high-viscosity PA6 melt and the low-viscosity PA6 melt are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate, and relaxation heat treatment is carried out to obtain polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line;
the included angle between the oblique line I and the transverse line is 40-50 degrees, and the included angle between the oblique line II and the transverse line is 60-70 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.5-2.0: 1: 1; the ratio of the length to the width of the transverse line is 2.5-3.5: 1;
the distribution is such that the high viscosity PA6 melt flow is controlled across the line, while the low viscosity PA6 melt flow is controlled across slope I and slope II.
The forces of the fibers and water molecules are different due to the difference in the structure and surface composition of the fibers, and thus the difference in the water absorption amount and water delivery rate of the fiber assembly composed of different fibers is caused. The liquid absorption by the fiber comprises four processes: (1) wetting, i.e., the fiber surface and liquid contact each other, which is related to the nature of the fiber itself, surface energy level and roughness of the outer surface; (2) wicking, i.e., liquid initially enters the internal voids of the fibers, which are all non-solid and porous, interfacial tension exists between the liquid and the fibers, and the internal voids of the fibrous textile material exert a pressure on the liquid, which automatically allows the liquid to enter the internal voids of the fibers from the outer surface of the fibrous material; (3) expanding; (4) saturation, the liquid fills the entire fiber interior, which depends mainly on how many voids are inside the fiber, the size of the voids. A sufficiently thin tube is inserted into a container containing a wetting liquid, which will rise to a certain height from the bottom of the tube without external force and remain at this height, which is the capillary wicking effect.
For the mark pen, a large number of capillary pores are formed in the fiber pen point and the fiber water storage core, the pores of the fiber pen point are smaller than those of the fiber water storage core, and when the mark pen writes, an additional pressure difference exists between the pen point and the water storage core, so that ink continuously flows from the water storage core to the pen point, and is uniformly distributed on the surface of a written material, namely a differential capillary effect.
In the manufacture of fiber nib, once the fibers are defined, the porosity between the fibers determines the ink-conducting properties of the nib. The existing pen point material is mainly polyester or polyamide DTY (draw textured yarn), the DTY has high fluffiness, but the two fibers are still mainly in surface contact when being combined together. The invention reasonably designs the shape and size of the spinneret orifice, so that the fiber is twisted, the contact mode between the fiber and the fiber is changed, the surface contact is changed into point contact, the point contact is more favorable for forming a large amount of tiny pores with capillary size grade between the monofilament and the monofilament relative to the surface contact, the capillary attraction is increased, an additional pressure difference is generated between the pen point and the pen core and can cause liquid water to automatically flow from the pen core to the pen point, and the twisting mechanism is as follows:
in the spinning process of synthetic fibers, when the fibers are formed, the inside of the fibers can be oriented and crystallized, so that the fibers have internal stress, when external conditions are changed, such as heating or contact with water, the formed fibers can be deformed due to environmental changes, namely, the oriented parts or crystallized areas in the fibers can be changed relatively, the internal stress of the fibers is an additional interaction force for trying to restore the deformed fibers to the initial state, for different polymers, the orientation and the crystallization inside the fibers are different, and therefore, the internal stress generated by different polymers is different;
in the present invention, the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the utility model is composed of a horizontal line, and a slash I and a slash II which are connected with the horizontal line, the slash I and the slash II are respectively arranged at two opposite sides of the horizontal line, the width of the slash I is larger than that of the slash II, and the length of the slash I is equal to that of the slash IIThe lengths of the oblique lines I and II are greater than the width of the transverse line, the material corresponding to the oblique lines I and II is low-viscosity PA6, and the material corresponding to the transverse line is high-viscosity PA 6;
at the position where the oblique line I or the oblique line II is in contact with the transverse line, two internal stresses in opposite directions exist simultaneously, the internal stress in one direction is derived from the high-viscosity PA6, the internal stress in the other direction is derived from the low-viscosity PA6, and the internal stresses in the two opposite directions mutually counteract to form the internal stress in a single direction;
because the lengths of the oblique line I and the oblique line II are greater than the width of the transverse line, and the internal stress of the low-viscosity PA6 is greater than that of the high-viscosity PA6, the final direction of the internal stress points to the oblique line I at the position where the oblique line I is in contact with the transverse line, the final direction of the internal stress points to the oblique line II at the position where the oblique line II is in contact with the transverse line, and the final direction of the internal stress at the position where the oblique line I is in contact with the transverse line is opposite to that of the internal stress at the position where the oblique line II is in contact with the transverse line, and the fiber is made of fiber
Two internal stresses in opposite directions exist on the cross section of the fiber, so that the fiber is twisted to form a self-twisting structure;
in addition, since the width of the oblique line I is larger than that of the oblique line II, and the length of the oblique line I is equal to that of the oblique line II, the internal stress at the contact position of the oblique line I and the transverse line is larger than that at the contact position of the oblique line II and the transverse line, and then the internal stress and the internal stress are matched
Dimensional parameters of the shape such that the twist angle per unit length of the fiber
The thickness of the fiber reaches 13-180 DEG/10 mu m, and the performance of the fiber in all aspects is favorably considered.
As a preferable scheme:
according to the preparation method of the marker pen point, the mass ratio of the high-viscosity PA6 to the low-viscosity PA6 is 40: 60-45: 55.
According to the preparation method of the pen point of the marker pen, the parameters of the FDY process are as follows: the spinning temperature is 276-279 ℃, the cooling temperature is 20-25 ℃, the speed of a roller is 2400-2500 m/min, the temperature of a roller is 70-80 ℃, the speed of a two roller is 3200-3300 m/min, the temperature of a two roller is 135-140 ℃, the speed of a three roller is 4100-4300 m/min, the temperature of a three roller is 150-155 ℃, and the winding speed is 4030-4200 m/min.
The method for preparing the pen point of the marker pen adopts the composite spinning assembly, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom;
the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows;
the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2;
the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular;
the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides;
a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3;
the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G;
on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the composite spinning assembly is positioned in the assembly spinning manifold.
According to the preparation method of the marker pen point, the intrinsic viscosity of the high-viscosity PA6 melt is 2.50-2.60 dL/g, the temperature of the high-viscosity PA6 melt spinning manifold is 280-285 ℃, the intrinsic viscosity of the low-viscosity PA6 melt is 2.20-2.30 dL/g, the temperature of the low-viscosity PA6 melt spinning manifold is 270-275 ℃, and the temperature of the component spinning manifold is 276-279 ℃. The invention reasonably sets the temperature of the high-viscosity PA6 melt spinning manifold, the low-viscosity PA6 melt spinning manifold and the component spinning manifold, ensures that the apparent viscosity of the high-viscosity PA6 component and the apparent viscosity of the low-viscosity PA6 component extruded from the spinneret orifices are closer, and further ensures the smooth spinning.
According to the preparation method of the marker pen point, the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
According to the preparation method of the pen point of the marker pen, the polyamide fiber for the pen point has a twisted shape.
The preparation method of the pen point of the marker pen is characterized in that the torsion angle of the polyamide fiber per unit length for the pen point
13 to 180 DEG/10 μm of (
l is the length of the fiber section with a number of turns of 1 in μm).
According to the preparation method of the marker pen point, the breaking strength of the polyamide fiber for the pen point is more than or equal to 4.5cN/dtex, and the breaking elongation is 25.0 +/-2.5%.
According to the preparation method of the marker pen point, the marking line trace of the marker pen point is smoothly more than or equal to 160 m, the pen point sliding force is more than or equal to 6.5N, the pen point strength is more than or equal to 5.5N, and the water absorption rate is more than or equal to 60% measured according to Q/NDL 170-2018.
Has the advantages that:
(1) according to the preparation method of the marker pen point, the shape and the size of the spinneret orifice are reasonably designed, so that the fiber is twisted, the pressure difference between the marker pen point and the pen core is increased, and better writing experience is obtained;
(2) according to the preparation method of the marker pen point, the temperatures of the high-viscosity PA6 melt spinning manifold, the low-viscosity PA6 melt spinning manifold and the component spinning manifold are reasonably set, so that the smooth spinning of the high-viscosity PA 6/low-viscosity PA6 two-component composite fiber is guaranteed;
(3) the preparation method of the pen point of the marker pen is simple in process, low in cost and extremely good in application prospect.
Drawings
FIG. 1 is an exploded schematic view of a composite spin pack assembly;
FIGS. 2-3 are schematic structural views of two side surfaces of a first distribution plate;
FIGS. 4 to 5 are schematic structural views of two side surfaces of the second distribution plate;
FIGS. 6 to 7 are schematic structural views of the surfaces of both sides of the third distribution plate;
fig. 8 is a schematic view of the structure of the spinneret plate.
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.
Example 1
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.3dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.59dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.26dL/g) in a mass ratio of 45:55 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifices on the spinneret plate are
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 43 degrees, and the included angle between the oblique line II and the transverse line is 65 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.7:1: 1; the ratio of the length to the width of the transverse lines is 3: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the spinning adopts a composite spinning assembly, the composite spinning assembly is positioned in an assembly spinning manifold, and as shown in figures 1-8, the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, and the lower plate surface is provided withHas multiple groups of straight-line grooves E, grooves F and grooves G, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the speed of one roller is 2486m/min, the temperature of one roller is 75 ℃, the speed of two rollers is 3240m/min, the temperature of two rollers is 140 ℃, the speed of three rollers is 4246m/min, the temperature of three rollers is 154 ℃, and the winding speed is 4154 m/min;
the temperature of the high-viscosity PA6 melt spinning beam is 284 ℃, the temperature of the low-viscosity PA6 melt spinning beam is 274 ℃, and the temperature of the component spinning beam is 279 ℃;
the temperature of the relaxation heat treatment is 110 ℃, and the time is 24 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
140 DEG/10 mu m; the breaking strength of the polyamide fiber for the pen point is 4.8cN/dtex, and the elongation at break is 22.9%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the marking line trace of the finally prepared mark pen point is smooth 177 meters, the sliding and shrinking force of the pen point is 6.7N, the strength of the pen point is 6.1N, and the water absorption rate is 72%.
Example 2
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.5dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.2dL/g) in a mass ratio of 40:60 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 40 degrees, and the included angle between the oblique line II and the transverse line is 60 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.5:1: 1; the ratio of the length to the width of the transverse lines is 2.5: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with a circular outer ring groove which is distributed in a concentric circle, is not communicated with each otherO3, a middle ring groove M3 and an inner ring groove I3; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 20 ℃, the speed of one roller is 2400m/min, the temperature of one roller is 70 ℃, the speed of two rollers is 3200m/min, the temperature of two rollers is 135 ℃, the speed of three rollers is 4100m/min, the temperature of three rollers is 150 ℃, and the winding speed is 4030 m/min;
the temperature of the high-viscosity PA6 melt spinning manifold is 280 ℃, the temperature of the low-viscosity PA6 melt spinning manifold is 270 ℃, and the temperature of the component spinning manifold is 276 ℃;
the temperature of the relaxation heat treatment is 90 ℃ and the time is 30 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
13 °/10 μm; the breaking strength of the polyamide fiber for the pen point is 4.5cN/dtex, and the elongation at break is 27.5%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the finally prepared mark pen point of the mark pen is smooth in lineation trace of 160 meters, the sliding and shrinking force of the pen point is 6.5N, the strength of the pen point is 5.5N, and the water absorption rate is 60%.
Example 3
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.3dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.5dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.29dL/g) in a mass ratio of 45:55 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 42 degrees, and the included angle between the oblique line II and the transverse line is 61 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.7:1: 1; the ratio of the length to the width of the transverse lines is 2.7: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow passage A1 for low-viscosity PA6 melt to flow through and a flow passage A for low-viscosity PA6 melt to flow throughRunner B1 through which the high viscosity PA6 melt flowed; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 23 ℃, the speed of one roller is 2441m/min, the temperature of one roller is 71 ℃, the speed of two rollers is 3212m/min, the temperature of two rollers is 138 ℃, the speed of three rollers is 4125m/min, the temperature of three rollers is 150 ℃, and the winding speed is 4072 m/min;
the temperature of the high-viscosity PA6 melt spinning manifold is 281 ℃, the temperature of the low-viscosity PA6 melt spinning manifold is 271 ℃, and the temperature of the component spinning manifold is 277 ℃;
the temperature of the relaxation heat treatment is 107 ℃, and the time is 28 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
Is 86 DEG/10 mu m; the breaking strength of the polyamide fiber for the pen point is 4.6cN/dtex, and the elongation at break is 23.7%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the marking line trace of the finally prepared mark pen point is smooth and 171 m, the pen point sliding shrinkage force is 6.5N, the pen point strength is 5.7N, and the water absorption rate is 61%.
Example 4
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.5dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.55dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.21dL/g) in a mass ratio of 40:60 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 40 degrees, and the included angle between the oblique line II and the transverse line is 63 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 2:1: 1; the ratio of the length to the width of the transverse lines is 2.7: 1; the distribution is that the high viscosity PA6 melt flow is controlled to cross the line, and the low viscosity PA6 melt flow is controlled to flowSlash I and slash II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the speed of one roller is 2445m/min, the temperature of one roller is 73 ℃, the speed of two rollers is 3222m/min, the temperature of two rollers is 138 ℃, the speed of three rollers is 4138m/min, the temperature of three rollers is 151 ℃, and the winding speed is 4116 m/min;
the temperature of the high-viscosity PA6 melt spinning manifold is 281 ℃, the temperature of the low-viscosity PA6 melt spinning manifold is 271 ℃, and the temperature of the component spinning manifold is 278 ℃;
the temperature of the relaxation heat treatment is 109 ℃, and the time is 25 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
95 °/10 μm; the breaking strength of the polyamide fiber for the pen point is 4.7cN/dtex, and the elongation at break is 23.1%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the finally prepared mark pen point of the mark pen is smooth in lineation trace of 174 meters, the pen point sliding force is 6.5N, the pen point strength is 5.7N, and the water absorption rate is 63%.
Example 5
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.1dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.5dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.23dL/g) in a mass ratio of 45:55 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the angle between the oblique line I and the transverse line is 42 degrees, and the angle between the oblique line II and the transverse lineThe included angle is 70 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.5:1: 1; the ratio of the length to the width of the transverse lines is 3.1: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 20 ℃, the speed of one roller is 2413m/min, the temperature of one roller is 70 ℃, the speed of two rollers is 3206m/min, the temperature of two rollers is 137 ℃, the speed of three rollers is 4103m/min, the temperature of three rollers is 150 ℃, and the winding speed is 4049 m/min;
the temperature of the high-viscosity PA6 melt spinning manifold is 280 ℃, the temperature of the low-viscosity PA6 melt spinning manifold is 270 ℃, and the temperature of the component spinning manifold is 276 ℃;
the temperature of the relaxation heat treatment is 92 ℃, and the time is 29 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
65 DEG/10 mu m; the breaking strength of the polyamide fiber for the pen point is 4.6cN/dtex, and the elongation at break is 25%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the marking line trace of the finally prepared mark pen point is smooth 167 m, the pen point sliding shrinkage force is 6.5N, the pen point strength is 5.6N, and the water absorption rate is 60%.
Example 6
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.1dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.57dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.2dL/g) in a mass ratio of 40:60 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 41 degrees, and the included angle between the oblique line II and the transverse line is 62 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.6:1: 1; the ratio of the length to the width of the transverse lines is 2.9: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the speed of one roller is 2477m/min, the temperature of one roller is 74 ℃, the speed of two rollers is 3239m/min, the temperature of two rollers is 138 ℃, the speed of three rollers is 4245m/min, the temperature of three rollers is 153 ℃, and the winding speed is 4152 m/min;
the temperature of the high-viscosity PA6 melt spinning beam is 283 ℃, the temperature of the low-viscosity PA6 melt spinning beam is 272 ℃, and the temperature of the component spinning beam is 279 ℃;
the temperature of the relaxation heat treatment is 109 ℃, and the time is 24 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
100 DEG/10 mu m; the breaking strength of the polyamide fiber for the pen point is 4.8cN/dtex, and the elongation at break is 22.9%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the marking line trace of the finally prepared mark pen point is smooth 176 meters, the sliding force of the pen point is 6.6N, the strength of the pen point is 5.9N, and the water absorption rate is 68%.
Example 7
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.5dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.51dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.2dL/g) in a mass ratio of 45:55 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 44 degrees, and the included angle between the oblique line II and the transverse line is 65 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.8:1: 1; the ratio of the length to the width of the transverse lines is 3.1: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 is in communication with O2 and I2, B1 is in communication with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the speed of one roller is 2491m/min, the temperature of one roller is 78 ℃, the speed of two rollers is 3296m/min, the temperature of two rollers is 140 ℃, the speed of three rollers is 4297m/min, the temperature of three rollers is 154 ℃, and the winding speed is 4193 m/min;
the temperature of the high-viscosity PA6 melt spinning beam is 285 ℃, the temperature of the low-viscosity PA6 melt spinning beam is 274 ℃, and the temperature of the component spinning beam is 279 ℃;
the temperature of the relaxation heat treatment is 114 ℃, and the time is 22 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
174 DEG/10 mu m; the breaking strength of the polyamide fiber for the pen point is 4.9cN/dtex, and the elongation at break is 22.5%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the marking line trace of the finally prepared mark pen point is smooth 181 meters, the pen point sliding shrinkage force is 6.8N, the pen point strength is 6.1N, and the water absorption rate is 75%.
Example 8
A preparation method of a pen point of a marker pen comprises the following steps:
(1) washing and drying the pen point with the filament number of 1.5dtex by using polyamide fiber;
the preparation process of the polyamide fiber for the pen point is as follows:
according to the FDY process, high-viscosity PA6 melt (the intrinsic viscosity is 2.6dL/g) and low-viscosity PA6 melt (the intrinsic viscosity is 2.3dL/g) in a mass ratio of 45:55 are distributed, and are extruded from spinneret orifices on the same spinneret plate to prepare FDY filaments, and relaxation heat treatment is carried out to obtain the polyamide fibers for the pen point;
the spinneret orifice is
The shape of the spinneret orifice is formed,
the shape of the body is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line; the included angle between the oblique line I and the transverse line is 50 degrees, and the included angle between the oblique line II and the transverse line is 70 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 2:1: 1; the ratio of the length to the width of the transverse lines is 3.5: 1; the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
the composite spinning assembly is used for spinning and is positioned in the assembly spinning box body, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom; the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows; the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; o2 and I2 are circular grooves which are communicated with each other; m2 is a C-shaped groove and is not communicated with O2 and I2; the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular; the orthographic projection of O2 and O3 completely coincides, the orthographic projection of M2 and M3 completely coincides, and the orthographic projection of I2 and I3 completely coincides; a1 and O2 and I2, B1 with M2; a plurality of through holes are respectively formed in the bottoms of the grooves of the O2, the M2, the I2, the O3, the M3 and the I3; the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group E, F, G is connected into a whole
A groove is shaped, E corresponds to a transverse line, F corresponds to an oblique line I, G corresponds to an oblique line II, through holes in M3 are positioned at two ends of E, through holes in O3 are positioned at one end, far away from E, of F, and through holes in I3 are positioned at one end, far away from E, of G; on the spinneret plate
Guide hole of spinneret orifice and
the shape grooves are communicated, and the orthographic projections are completely overlapped;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the speed of one roller is 2500m/min, the temperature of one roller is 80 ℃, the speed of two rollers is 3300m/min, the temperature of two rollers is 140 ℃, the speed of three rollers is 4300m/min, the temperature of three rollers is 155 ℃, and the winding speed is 4200 m/min;
the temperature of the high-viscosity PA6 melt spinning beam is 285 ℃, the temperature of the low-viscosity PA6 melt spinning beam is 275 ℃, and the temperature of the component spinning beam is 279 ℃;
the temperature of the relaxation heat treatment is 120 ℃, and the time is 20 min;
the prepared polyamide fiber for the pen point has a twisted shape and a twist angle per unit length
180 DEG/10 mu m; the breaking strength of the polyamide fiber for the pen point is 4.9cN/dtex, and the elongation at break is 22.5%;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the marking line trace of the finally prepared mark pen point is 185 meters smoothly, the pen point sliding shrinkage force is 7.6N, the pen point strength is 6.2N, and the water absorption rate is 75%.
Claims (9)
1. A preparation method of a pen point of a marker pen is characterized by comprising the following steps:
(1) washing and drying the pen point by using polyamide fiber;
(2) dipping glue by adopting a double-component polyurethane adhesive;
(3) preheating, curing and foaming the fiber bundle after gum dipping;
(4) cutting and grinding the completely foamed fiber bar;
(5) cleaning and drying to obtain the pen point of the mark pen;
the monofilament titer of the polyamide fiber for the pen point is 1.0-1.5 dtex, and the preparation process is as follows:
according to the FDY process, after the high-viscosity PA6 melt and the low-viscosity PA6 melt are distributed, FDY filaments are extruded from spinneret orifices on the same spinneret plate, and relaxation heat treatment is carried out to obtain polyamide fibers for the pen point;
the spinneret orifices are "
"shape spinneret orifice"
The shape of the Chinese character 'pin' is composed of a transverse line, and a slash I and a slash II which are connected with the transverse line;
the included angle between the oblique line I and the transverse line is 40-50 degrees, and the included angle between the oblique line II and the transverse line is 60-70 degrees; the length ratio of the oblique line I, the oblique line II and the transverse line is 1:1:2, and the intersection point of the oblique line I or the oblique line II and the transverse line is the midpoint of the transverse line; the ratio of the widths of the oblique line I, the oblique line II and the transverse line is 1.5-2.0: 1: 1; the ratio of the length to the width of the transverse line is 2.5-3.5: 1;
the distribution refers to controlling the high viscosity PA6 melt flow to cross the line, and simultaneously controlling the low viscosity PA6 melt flow to cross the oblique lines I and II;
a composite spinning assembly is adopted, and the composite spinning assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are tightly attached from top to bottom;
the first distribution plate is provided with a flow channel A1 through which low-viscosity PA6 melt flows and a flow channel B1 through which high-viscosity PA6 melt flows;
the second distribution plate is provided with an outer ring groove O2, a middle ring groove M2 and an inner ring groove I2 which are distributed in concentric circles; the outer ring groove O2 and the inner ring groove I2 are circular grooves and are communicated with each other; the middle ring groove M2 is a C-shaped groove and is not communicated with the outer ring groove O2 and the inner ring groove I2;
the third distribution plate is provided with an outer ring groove O3, a middle ring groove M3 and an inner ring groove I3 which are distributed in concentric circles, are not communicated with each other and are circular;
the orthographic projection of the outer ring groove O2 and the outer ring groove O3 are completely overlapped, the orthographic projection of the middle ring groove M2 and the orthographic projection of the middle ring groove M3 are completely overlapped, and the orthographic projection of the inner ring groove I2 and the orthographic projection of the inner ring groove I3 are completely overlapped;
the flow passage A1 is communicated with the outer ring groove O2 and the inner ring groove I2, and the flow passage B1 is communicated with the middle ring groove M2; a plurality of through holes are respectively formed in the bottoms of the outer ring groove O2, the middle ring groove M2, the inner ring groove I2, the outer ring groove O3, the middle ring groove M3 and the inner ring groove I3;
the surface of the third distribution plate, which is attached to the spinneret plate, is a lower plate surface, a plurality of groups of linear grooves E, grooves F and grooves G are arranged on the lower plate surface, and each group of grooves E, grooves F and grooves G are connected into a whole "
The groove E corresponds to a transverse line, the groove F corresponds to an oblique line I, the groove G corresponds to an oblique line II, a through hole in the middle ring groove M3 is located at two ends of the groove E, a through hole in the outer ring groove O3 is located at one end, far away from the groove E, of the groove F, and a through hole in the inner ring groove I3 is located at one end, far away from the groove E, of the groove G;
on the spinneret plate "
Guide hole of 'shape spinneret orifice' and "
The' shape grooves are communicated, and the orthographic projections are completely overlapped;
the composite spinning assembly is positioned in the assembly spinning manifold.
2. The method for preparing the marker pen point as claimed in claim 1, wherein the mass ratio of the high-viscosity PA6 melt to the low-viscosity PA6 melt is 40: 60-45: 55.
3. The method for preparing a pen point of a marker pen as claimed in claim 2, wherein the parameters of the FDY process are as follows: the cooling temperature is 20-25 ℃, the speed of one roller is 2400-2500 m/min, the temperature of one roller is 70-80 ℃, the speed of two rollers is 3200-3300 m/min, the temperature of two rollers is 135-140 ℃, the speed of three rollers is 4100-4300 m/min, the temperature of three rollers is 150-155 ℃, and the winding speed is 4030-4200 m/min.
4. The method for preparing the pen point of the marker pen as claimed in claim 3, wherein the intrinsic viscosity of the high-viscosity PA6 melt is 2.50-2.60 dL/g, the temperature of the spinning beam containing the high-viscosity PA6 melt is 280-285 ℃, the intrinsic viscosity of the low-viscosity PA6 melt is 2.20-2.30 dL/g, the temperature of the spinning beam containing the low-viscosity PA6 melt is 270-275 ℃, and the temperature of the component spinning beam is 276-279 ℃.
5. The method for preparing a tip of a marker pen as claimed in claim 4, wherein the temperature of the relaxation heat treatment is 90 to 120 ℃ for 20 to 30 min.
6. The method of claim 5, wherein the polyamide fibers for the tip have a twisted configuration.
7. The method for preparing a pen point of a marker pen as claimed in claim 6, wherein the twist angle phi per unit length of the polyamide fiber for the pen point is 13 to 180 °/10 μm.
8. The method for preparing a tip of a marker pen as claimed in claim 7, wherein the breaking strength of the polyamide fiber for the tip is not less than 4.5cN/dtex and the elongation at break is 25.0 ± 2.5%.
9. The method for preparing the pen point of the marker pen as claimed in claim 1, wherein the lineation trace of the pen point of the marker pen is smoothly more than or equal to 160 m, the pen point slip force is more than or equal to 6.5N, the pen point strength is more than or equal to 5.5N, and the water absorption is more than or equal to 60%.
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| JPS56169813A (en) * | 1980-05-29 | 1981-12-26 | Toyobo Co Ltd | Synthetic fiber for wadding |
| JPH08232136A (en) * | 1995-02-28 | 1996-09-10 | Unitika Ltd | Production of lightweight perspiration emitting woven fabric |
| JPH08232137A (en) * | 1995-02-28 | 1996-09-10 | Unitika Ltd | Production of fabric good in touch |
| CN101748502B (en) * | 2009-12-12 | 2011-06-29 | 江苏三鑫化纤有限公司 | FDY (fully drawn yarn) terylene slub filament yarn and preparation method |
| CN103866405B (en) * | 2012-12-18 | 2017-04-05 | 中国纺织科学研究院 | A kind of high density holes profiled filaments and preparation method thereof |
| CN102978724B (en) * | 2012-12-21 | 2015-05-13 | 东华大学 | Dual-component parallel composite fiber and preparation method thereof |
| CN104451922A (en) * | 2014-12-31 | 2015-03-25 | 浙江华欣新材料股份有限公司 | Special-shaped spinneret plate and method for producing square-section colored FDY through special-shaped spinneret plate |
| CN204752933U (en) * | 2015-07-06 | 2015-11-11 | 绍兴文理学院 | Moisture absorbable and breathable's chemical fiber |
| CN105177739A (en) * | 2015-08-07 | 2015-12-23 | 东华大学 | Two-component round hollow cross-shaped special-shaped high-absorbent complex fiber and production method thereof |
| CN105155008A (en) * | 2015-09-14 | 2015-12-16 | 江苏乘鹰新材料股份有限公司 | Preparation method and special spinneret plate of stereo color elastic fiber |
| CN106945321A (en) * | 2016-01-06 | 2017-07-14 | 余姚市创辉树脂笔头厂 | A kind of microporous fibre bar preparation method |
| CN108162632B (en) * | 2017-11-24 | 2019-07-19 | 东华大学 | A kind of high water absorbing capacity high-strength polyester fiber nib and preparation method thereof |
| CN208632707U (en) * | 2018-07-13 | 2019-03-22 | 江苏恒泽复合材料科技有限公司 | A kind of profile spinneret |
| CN109664639A (en) * | 2018-11-28 | 2019-04-23 | 温州大学 | A kind of blended structure environmental protection macromolecule nib manufacturing process |
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