CN212983110U - Spinneret plate with double-layer hollow spray holes - Google Patents
Spinneret plate with double-layer hollow spray holes Download PDFInfo
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Abstract
The utility model discloses a spinneret plate with double-layer hollow orifices, which comprises a spinneret plate body and spinneret orifice units, wherein the spinneret plate body is provided with a plurality of spinneret orifice units distributed in a concentric circle shape, each spinneret orifice unit consists of a plurality of micropores in a rotational symmetry manner, each micropore comprises an outer arc section and an inner Y-shaped support, and the tail end of each inner Y-shaped support is connected with the center of the sunken inner wall of the outer arc section and is arranged along the radial direction of a base circle where the outer arc section is located; the microporous structures are spliced together to form a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular polygonal ring, and a micro-gap is reserved between every two adjacent microporous structures. The utility model has the advantages that: the fibers sprayed by the special spinneret orifice units on the spray plate can maintain the section structure and the hollowness, the stability and the heat preservation performance of the hollow structure of the fibers are improved, the requirements of people on light and heat preservation fibers are met, and the development prospect is excellent.
Description
Technical Field
The utility model belongs to the technical field of chemical fiber production spinning pack technique and specifically relates to a spinneret of double-deck cavity orifice.
Background
The terylene is the most widely used synthetic fiber with the largest world output, and accounts for more than 70% of the world synthetic fiber output. The fabric is applied to textiles such as clothing fabrics, household fabrics, industrial products, special fabrics and the like. The terylene textile has the defects of difficult dyeing, poor moisture absorption and air permeability, poor touch, soft luster, easy electrostatic adhesion to dirty dust and the like. The development of a new differentiated and functional polyester variety improves the added value of products and has an important effect on improving the economic benefit of enterprises. Common hollow fiber is mostly simple ring cavity, and its in processing, use, hollow structure easily receives the extrusion to collapse, leads to the hollowness to obviously descend, and the fibre performance receives great influence. Therefore, a spray plate specially used for preparing the double-layer hollow thermal fibers needs to be designed.
Disclosure of Invention
The utility model aims at providing a spinneret of double-deck cavity orifice in order to solve the not enough of above-mentioned technique, the fabric that the chemical fibre of production was processed into has advantages such as better warmth retention and cross-sectional structure stability.
The spray plate for preparing the double-layer hollow thermal fibers is characterized in that: the spinneret plate comprises a spinneret plate body and spinneret orifice units, wherein a plurality of spinneret orifice units distributed in a concentric circle shape are arranged on the spinneret plate body, each spinneret orifice unit is formed by a plurality of micropores in a rotational symmetry mode, each micropore comprises an outer arc section and an inner Y-shaped support, and the tail end of each inner Y-shaped support is connected to the center of the inner wall of the depression of the outer arc section and arranged along the radial direction of the base circle where the outer arc section is located; the microporous structures are spliced together to form a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular polygonal ring, and a micro-gap is reserved between every two adjacent microporous structures.
All spinneret orifice units are consistent in structure and size.
The outer end of the outer arc section of the microporous structure and the head part at the same side of the inner Y-shaped support are both positioned on the same radius of the base circle where the outer arc section is positioned.
The symmetry axes of the inner Y-shaped supports are jointly intersected at the center of the base circle where the outer arc section is located.
The front ends of the inner Y-shaped supporting heads are positioned on the same base circle which takes the center of the spinneret orifice unit as the center of a circle.
The spinneret orifice unit is formed by three microporous structures in a rotational symmetry mode, the rotation angle is 120 degrees, and the three microporous structures are jointly spliced into a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular triangle ring.
The width of the micro-slit is 0.2 mm.
The width of the spinneret orifice unit is 0.02-0.1mm, the length of each side of the inner Y-shaped support is 0.06-0.3mm, the included angle towards the center is 60 degrees, and the other two included angles are both 120 degrees; the length of the outer circular arc section is 0.35-1.7mm, and the radius is 0.18-0.9 mm.
Utilize the cold-proof polyester fiber of double-deck cavity of spout board preparation, its characterized in that: the outer contour of the axial cross section of the polyester fiber is circular, a plurality of arc-shaped hollow structures are arranged along the circumferential direction, and the centers of the arc-shaped hollow structures are positioned on the same base circle; the center of the axial cross section of the polyester fiber is provided with a hollow area of a regular polygon.
The axial cross section of the polyester fiber is provided with 3 arc-shaped hollow structures along the circumferential direction, and the 3 arc-shaped hollow structures are arranged at equal intervals.
The hollow-out area is of a regular triangle hollow structure.
The arc-shaped hollow structure is an arc-shaped strip-shaped structure which is circumferentially arranged along the axial cross section of the polyester fiber.
Utilize a preparation double-deck cavity polyester fiber that keeps warm that spouts board preparation of double-deck cavity, the fuse-element can link to each other in breakpoint department owing to extrude the bloated effect behind the blowout hole, forms the outer lane and is the ring, and the inner circle is the double-deck hollow structure of positive angle shape tricycle.
A preparation system of double-layer hollow thermal polyester fibers is characterized by comprising the following components:
the main melt pipeline is provided with a main melt inlet and a mixed melt outlet, wherein the main melt inlet is communicated with the main melt adding equipment pipeline, and the mixed melt outlet is communicated with a discharge port pipeline of the online adding system and is used for mixing the material obtained by the online adding system and the main melt to form a mixed melt;
the online adding system comprises two feeding units and a dynamic mixer, wherein the feeding units comprise a drying tower, a screw extruder, an injection pump and an injection valve, and the screw extruders of the two feeding units are named as a first screw extruder and a second screw extruder respectively; the drying tower is respectively arranged at the feed inlets of the first screw extruder and the second screw extruder, and an injection pump and an injection valve are respectively arranged on pipelines between the first screw extruder and the main melt pipeline and between the second screw extruder and the first screw extruder and used for controlling the flow rate of feed liquid in the pipeline; the first screw extruder and the second screw extruder are respectively provided with a plurality of temperature control subareas and flange areas along the advancing direction of the screws, and each temperature control subarea and each flange area are provided with an independent heating device for controlling the temperature of the temperature control subareas and the flange areas; an opening which can be communicated with the second screw extruder is arranged between two adjacent temperature control subareas of the first screw extruder;
the metering spinning unit is arranged at the downstream of the dynamic mixer and comprises a metering pump, a spinning box air cooling system, an oiling device and a winding device, wherein the metering pump is arranged on a pipeline between the dynamic mixer and the spinning box; a discharge port of the spinning box body is provided with a spinning assembly for spraying double-layer hollow thermal polyester fibers; the air cooling system is arranged beside the spinning assembly and is used for cooling the double-layer hollow thermal polyester fibers spun by the spinning assembly; the oiling device and the winding device are sequentially arranged at the downstream of the spinning assembly and are used for oiling and winding the cooled double-layer hollow heat-preservation polyester fibers.
The first screw extruder and the second screw extruder are respectively provided with 6 temperature control subareas along the advancing direction of the screws, namely a first area, a fifth area and a flange area, and the temperature of the first area and the temperature of the second area are 290-305 ℃; the temperature of the three area and the four area is 285-295 ℃; the temperature of the fifth zone and the flange zone is 280-290 ℃, so that the screws of the first screw extruder and the second screw extruder push the materials in the first screw extruder and the second screw extruder to sequentially pass through the first zone, the second zone, …, the fifth zone and the flange zone under the driving of respective screw motors, and the heating at different temperatures is realized.
The first screw extruder had openings between the second zone and the third zone.
The spinneret assembly comprises the spinneret plate, a plurality of spinneret orifice units distributed in a concentric circle shape are arranged on a spinneret plate body of the spinneret plate, each spinneret orifice unit is formed by a plurality of micropore structures in a rotational symmetry mode, each micropore structure comprises an outer arc section and an inner Y-shaped support, and the tail end of each inner Y-shaped support is connected to the center of the inner wall of the depression of the outer arc section and arranged along the radial direction of a base circle where the outer arc section is located; the microporous structures are spliced together to form a double-layer hollow structure with an outer ring of a circular ring and an inner ring of a regular triangle ring, a micro-gap is reserved between every two adjacent microporous structures, and the width of the micro-gap is 0.2 mm.
The outer end of the outer arc section of the microporous structure and the head part at the same side of the inner Y-shaped support are both positioned on the same radius of the base circle where the outer arc section is positioned.
The spinneret orifice unit is formed by three micropore structures in a rotational symmetry mode, and the rotation angle is 120 degrees.
Utilize preparation system preparation double-deck cavity polyester fiber's method that keeps warm, its characterized in that includes following step:
1) on a terylene melt direct spinning pipeline, a main melt pipeline is reformed in front of a metering pump and a spinning box body, an online adding system consisting of two feeding units and a dynamic mixer is additionally arranged, each feeding unit comprises a drying tower, a screw extruder, an injection pump and an injection valve, wherein the screw extruders of the two feeding units are respectively named as a first screw extruder and a second screw extruder;
2) respectively drying the two additive master batches by the drying tower in the step 1), and respectively feeding the two additive master batches into a first screw extruder and a second screw extruder;
3) the material extruded by the second screw extruder is metered by a downstream injection pump and then injected into the opening of the first screw extruder, and then is premixed, compressed and metered by the first screw extruder and then injected into the main melt pipeline, and then is fully mixed with the main melt by a dynamic mixer to obtain a blended melt;
4) conveying the blended melt obtained in the step 3) to a spinning assembly through a metering pump and a spinning box to spray filaments; controlling parameters of the two injection pumps and the spinning metering pump to achieve the purpose of adjusting the adding proportion;
5) cooling and oiling the filaments obtained in the step 4), and winding and forming to obtain the double-layer hollow thermal polyester fiber.
Wherein: the purpose of steps 1) to 3) is to prepare a blended melt with a warm-keeping function; the purpose of steps 4) to 5) is to prepare the double-layer hollow thermal polyester fiber.
The two kinds of additive master batches in the step 3) are respectively a master batch A and a master batch B, wherein:
master batch A: is aerogel master batch, the particle size of the aerogel component is 15-30 μm, and the aerogel component is added from a first screw extruder;
master batch B: is a master batch with far infrared function, the grain diameter of the far infrared ceramic powder is 1-8 μm, and the far infrared ceramic powder is added from a first screw extruder.
The mass fraction of aerogel components contained in the aerogel master batch is 0.5-1.5%; the far infrared ceramic powder contained in the far infrared functional master batch has the mass fraction of 0.5-2 percent and the total mass fraction of the two components is 1-3 percent.
The utility model discloses on dacron large capacity fuse-element direct spinning device's basis, add on line and double-deck hollow cross section spinneret through two kinds of cold-proof function master batches two unifications, make a cold-proof polyester fiber material, realize the reinforcing structure, improve the target of thermal behavior. The temperature of the screw can be flexibly adjusted according to the characteristics of the added master batch, so that the two components are melted and fully mixed uniformly. The cross section of the fiber is in a structure of an outer circular ring and an inner triangular ring, and a stable hollow structure can be kept in the processing and using processes.
The utility model has the advantages that: the fibers sprayed by the special spinneret orifice units on the spray plate can maintain the section structure and the hollowness, the stability and the heat preservation performance of the hollow structure of the fibers are improved, the requirements of people on light and heat preservation fibers are met, and the development prospect is excellent.
Drawings
FIG. 1 is a structural view of a nozzle plate of the present invention;
FIG. 2 is a cross-sectional view of the spinneret orifice unit of the present invention;
FIG. 3 is a cross-sectional view of the double-layered hollow thermal polyester fiber of the present invention;
FIG. 4 is a block diagram of a manufacturing system of the present invention;
FIG. 5 is a block diagram of the metering spinning unit of the present invention;
wherein, 1 is a spray plate body; 2 is a spinneret orifice unit; 21 is an outer arc section; 22 is an inner Y-shaped support; 3 is a drying tower; 4 is a first screw extruder; 5 is a second screw extruder; 6 is an injection pump; 7 is an injection valve; 8 is a main melt pipeline; 9 is the axial cross section of the polyester fiber; 91 is an arc hollow structure; 92 is a hollow-out area; a is a region; b is a second zone; c is a third area; d is four areas; e is five regions; f is a flange area; j is a screw motor; k is a dynamic mixer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
With reference to the accompanying drawings:
The outer end of the outer arc section of the micropore and the head part at the same side of the inner Y-shaped support are both positioned on the same radius of the base circle where the outer arc section is positioned.
The symmetry axes of the inner Y-shaped supports are jointly intersected at the center of the base circle where the outer arc section is located.
The front ends of the inner Y-shaped supporting heads are positioned on the same base circle which takes the center of the spinneret orifice unit as the center of a circle.
The spinneret orifice unit 2 is formed by three micropore structures in a rotational symmetry mode, the rotation angle is 120 degrees, and the three micropore structures are jointly spliced into a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular triangle ring.
The width of the spinneret orifice unit is 0.02-0.1mm, the length of each side of the inner Y-shaped support is 0.06-0.3mm, the included angle towards the center is 60 degrees, and the other two included angles are both 120 degrees; the length of the outer circular arc section is 0.35-1.7mm, and the radius is 0.18-0.9 mm.
In the spinneret plate with the double-layer hollow nozzle described in embodiment 2, the spinneret plate body has a flat cylindrical structure, the plurality of spinneret hole units are concentrically distributed on the spinneret plate surface, and all the spinneret hole units have the same structure and size. Each spinneret orifice unit is formed by three micropores in a rotational symmetry mode, the rotation angle is 120 degrees, and melts can be connected at a breakpoint position due to an extrusion swelling effect after being jetted out of the orifices to form a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular triangular ring.
The width of the wire outlet through hole is 0.04mm, the length of each side of the inner Y-shaped support is 0.12mm, the included angle towards the center is 60 degrees, and the other two included angles are both 120 degrees; the outer arc section is 0.65mm in length and 0.36mm in radius.
Example 3 the embodiment describes a spinneret plate with double-layer hollow jet holes, which is different from the embodiment 1 in that: the width of the wire outlet through hole is 0.08mm, the length of each side of the inner Y-shaped support is 0.24mm, the included angle towards the center is 60 degrees, and the other two included angles are both 120 degrees; the length of the outer arc section is 1.3mm, and the radius is 0.72 mm.
The axial cross section of the polyester fiber is provided with 3 arc-shaped hollow structures along the circumferential direction, and the 3 arc-shaped hollow structures are arranged at equal intervals.
The hollow-out area is of a regular triangle hollow structure.
The arc-shaped hollow structure is an arc-shaped strip-shaped structure which is circumferentially arranged along the axial cross section of the polyester fiber.
the main melt pipeline 8 is provided with a main melt inlet and a mixed melt outlet, wherein the main melt inlet is communicated with a main melt adding equipment pipeline, and the mixed melt outlet is communicated with a discharge port pipeline of the online adding system and is used for mixing the material obtained by the online adding system and the main melt to form a mixed melt;
the online adding system comprises two feeding units and a dynamic mixer, wherein the feeding units comprise a drying tower 3, a screw extruder, an injection pump 6 and an injection valve 7, and the screw extruders of the two feeding units are respectively named as a first screw extruder 4 and a second screw extruder 5; the drying tower is respectively arranged at the feed inlets of the first screw extruder and the second screw extruder, and an injection pump and an injection valve are respectively arranged on pipelines between the first screw extruder and the main melt pipeline and between the second screw extruder and the first screw extruder and used for controlling the flow rate of feed liquid in the pipeline; the first screw extruder and the second screw extruder are respectively provided with a plurality of temperature control subareas and flange areas along the advancing direction of the screws, and each temperature control subarea and each flange area are provided with an independent heating device for controlling the temperature of the temperature control subareas and the flange areas; an opening which can be communicated with the second screw extruder is arranged between two adjacent temperature control subareas of the first screw extruder;
the metering spinning unit is arranged at the downstream of the dynamic mixer and comprises a metering pump, a spinning box air cooling system, an oiling device and a winding device, wherein the metering pump is arranged on a pipeline between the dynamic mixer and the spinning box; a discharge port of the spinning box body is provided with a spinning assembly for spraying double-layer hollow thermal polyester fibers; the air cooling system is arranged beside the spinning assembly and is used for cooling the double-layer hollow thermal polyester fibers spun by the spinning assembly; the oiling device and the winding device are sequentially arranged at the downstream of the spinning assembly and are used for oiling and winding the cooled double-layer hollow heat-preservation polyester fibers.
A plurality of spinneret orifice units distributed in a concentric circle shape are arranged on a spinneret panel of the spinneret assembly, each spinneret orifice unit is formed by a plurality of micropore structures in a rotational symmetry mode, each micropore comprises an outer arc section and an inner Y-shaped support, and the tail end of each inner Y-shaped support is connected to the center of the inner wall of the depression of the outer arc section and arranged along the radial direction of a base circle where the outer arc section is located; the micropores are jointly spliced into a double-layer hollow structure with an outer ring of a circular ring and an inner ring of a regular triangle ring, a micro-gap is reserved between every two adjacent micropores, and the width of the micro-gap is 0.2 mm.
The outer end of the outer arc section of the micropore and the head part at the same side of the inner Y-shaped support are both positioned on the same radius of the base circle where the outer arc section is positioned.
The spinneret orifice unit is formed by three micropore structures in a rotational symmetry mode, and the rotation angle is 120 degrees.
The first screw extruder and the second screw extruder are respectively provided with 6 temperature control subareas along the advancing direction of the screws, namely a first area, a fifth area and a flange area, and the temperature of the first area A and the temperature of the second area B are 290-305 ℃; the temperature of the three areas C and the four areas D is 285-295 ℃; the temperature of the fifth zone E and the temperature of the flange zone F are 280-290 ℃, so that the screws of the first screw extruder and the second screw extruder push the materials in the first screw extruder and the second screw extruder to sequentially pass through the first zone, the second zone, …, the fifth zone and the flange zone under the driving of respective screw motors J, and heating at different temperatures is realized.
The first screw extruder 4 has openings between the second zone and the third zone.
1) on a terylene melt direct spinning pipeline, a main melt pipeline is reformed in front of a metering pump and a spinning box body, an online adding system consisting of two feeding units and a dynamic mixer is additionally arranged, each feeding unit comprises a drying tower, a screw extruder, an injection pump and an injection valve, wherein the screw extruders of the two feeding units are respectively named as a first screw extruder and a second screw extruder;
2) respectively drying the two additive master batches by the drying tower in the step 1), and respectively feeding the two additive master batches into a first screw extruder and a second screw extruder;
3) the material extruded by the second screw extruder is metered by a downstream injection pump and then injected into the opening of the first screw extruder, and then is premixed, compressed and metered by the first screw extruder and then injected into the main melt pipeline, and then is fully mixed with the main melt by a dynamic mixer to obtain a blended melt;
4) conveying the blended melt obtained in the step 3) to a spinning assembly through a metering pump and a spinning box to spray filaments; according to the fiber specification, the winding speed and the addition requirement, the parameters of the two injection pumps and the metering pump can be adjusted to achieve the purpose of controlling the addition proportion;
5) cooling and oiling the filaments obtained in the step 4) by circular blowing of a wind cylinder with the length of 250mm, and then winding and forming at the speed of 2500-2900 m/min to obtain the double-layer hollow thermal polyester fiber.
Wherein: the purpose of steps 1) to 3) is to prepare a blended melt with a warm-keeping function; the purpose of steps 4) to 5) is to prepare the double-layer hollow thermal polyester fiber.
The two kinds of additive master batches in the step 3) are respectively a master batch A and a master batch B, wherein:
master batch A: is aerogel master batch, the particle size of the aerogel component is 15-30 μm, and the aerogel component is added from a first screw extruder;
master batch B: is a master batch with far infrared function, the grain diameter of the far infrared ceramic powder is 1-8 μm, and the far infrared ceramic powder is added from a first screw extruder.
The mass fraction of aerogel components contained in the aerogel master batch is 0.5-1.5%; the far infrared ceramic powder contained in the far infrared functional master batch has the mass fraction of 0.5-2 percent and the total mass fraction of the two components is 1-3 percent.
the method comprises the steps that a melt pipeline is modified in front of a metering pump and a spinning box on a polyester melt direct spinning pipeline, and an online adding system is additionally arranged, wherein the online adding system comprises two screw extruders (hereinafter referred to as a first screw extruder and a second screw extruder), two drying towers (respectively corresponding to the first screw extruder and the second screw extruder), two injection pumps (respectively corresponding to the first screw extruder and the second screw extruder), a dynamic mixer and two injection valves (respectively corresponding to the first screw extruder and the second screw extruder);
placing the master batch A in a corresponding drying tower for drying until the moisture content is below 0.03%, then feeding the master batch A into a first screw extruder, and controlling the temperature of screws in a first zone 290 ℃, a second zone 293 ℃, a third zone 291 ℃, a fourth zone 290 ℃, a fifth zone 288 ℃ and a flange zone 286 ℃ in a subarea;
placing the master batch B in a corresponding drying tower for drying until the moisture content reaches below 0.03%, and then feeding the master batch B into a second screw extruder, wherein the screw temperature is controlled in a partition mode as follows: 290 ℃ in the first zone, 295 ℃ in the second zone, 293 ℃ in the third zone, 292 ℃ in the fourth zone, 290 ℃ in the fifth zone and 288 ℃ in the flange zone;
and the material extruded by the screw of the screw motor of the second screw extruder is driven by the screw motor of the second screw extruder to be metered by the injection pump and then is injected from the opening between the two and three divisions of the first screw extruder, and is premixed with the master batch A in the first screw extruder, compressed and metered by the injection pump to be injected into the main melt pipeline, and is mixed with the polyester melt at the dynamic mixer to obtain the thermal-insulation functional melt.
The obtained thermal-insulation functional melt is metered by a metering pump and then is sprayed out of a double-layer hollow spinneret plate through a spinning box; the temperature of the spinning box body is 275-295 ℃; the spinneret plate is characterized in that: the spinneret orifice units (figure 3) are distributed on the spinneret plate surface in a concentric circle shape, each spinneret orifice unit is formed by three micropores in a rotational symmetry mode, the rotation angle is 120 degrees, a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular triangular ring is formed, and the width of each micro slit is 0.2 mm. The pressure of the assembly is 130-180 Bar.
The parameters of the two injection pumps and the metering pump are adjusted to control the adding proportion, so that the aerogel component accounts for 1 wt% of the fiber, and the far infrared ceramic powder accounts for 2 wt% of the fiber.
After the thermal-insulation functional melt is sprayed out by a spinneret plate, the melt is cooled by circular blowing with a long air duct of 250mm, and after oiling and networking, the melt is wound and molded at the speed of 2500-2900 m/min to obtain the double-layer hollow thermal-insulation polyester fiber.
Example 8 the double-layer hollow thermal polyester fiber prepared by the preparation method of example 7 has a monofilament linear density of 2.5 to 4.0 dtex; under the environment of 25 ℃, the breaking strength is more than or equal to 2.2cN/dtex, the elongation at break is 125 +/-4%, the yarn unevenness is less than or equal to 2.0%, the oil content is 0.3-0.5%, and the heat conductivity coefficient lambda is less than or equal to 0.04W/m.K; the hollowness of the POY is 16-17%, the hollowness of the DTY after texturing is 15-16%, and the reduction rate of the hollowness is less than or equal to 6.1%.
Embodiment 9 a method for preparing a double-layer hollow thermal fiber according to this embodiment includes the following steps:
on a terylene melt direct spinning pipeline, a main melt pipeline is reformed in front of a metering pump and a spinning box body, and an online adding system is additionally arranged, wherein the online adding system comprises two screw extruders (hereinafter referred to as a first screw extruder and a second screw extruder), two drying towers, two injection pumps, a dynamic mixer and a plurality of valves;
drying the master batch A until the moisture content is below 0.03%, feeding the master batch into a first screw extruder, and controlling the temperature of a screw in a first zone of 292 ℃, a second zone of 295 ℃, a third zone of 292 ℃, a fourth zone of 289 ℃, a fifth zone of 287 ℃ and a flange zone of 285 ℃;
drying the master batch B until the moisture content is below 0.03%, feeding the master batch into a second screw extruder, and controlling the temperature of the screws in a subarea mode as follows: 290 ℃ in the first zone, 295 ℃ in the second zone, 293 ℃ in the third zone, 292 ℃ in the fourth zone, 290 ℃ in the fifth zone and 288 ℃ in the flange zone;
and the material extruded by the second screw extruder is metered by an injection pump and then injected from the opening between the second and third partitions of the first screw extruder, is premixed with the master batch A in the first screw extruder, is compressed, is metered by the injection pump and is injected into a melt pipe, and is mixed with the polyester melt at a dynamic mixer to obtain the thermal-insulation functional melt.
The obtained thermal-insulation functional melt is metered by a metering pump and then is sprayed out of a double-layer hollow spinneret plate through a spinning box; the temperature of the box body is 275-295 ℃; the spinneret plate is characterized in that: the spinneret orifice units (figure 2) are distributed on the spinneret plate surface in a concentric circle shape, each spinneret orifice unit is formed by three micropores in a rotational symmetry mode, the rotation angle is 120 degrees, a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular triangular ring is formed, and the width of each micro slit is 0.2 mm. The pressure of the assembly is 130-180 Bar.
The parameters of the two injection pumps and the spinning metering pump are adjusted to control the adding proportion, so that the aerogel component accounts for 0.8 wt% of the fiber, and the far infrared ceramic powder accounts for 1.8 wt% of the fiber.
After the thermal-insulation functional melt is sprayed out by a spinneret plate, the melt is cooled by circular blowing with a long air duct of 250mm, and after oiling and networking, the melt is wound and molded at the speed of 2500-2900 m/min to obtain the double-layer hollow thermal-insulation polyester fiber.
Example 10 a double-layer hollow thermal polyester fiber prepared by the preparation method of example 9, the monofilament linear density of which is 2.0 to 3.5 dtex; under the environment of 25 ℃, the breaking strength is more than or equal to 2.0cN/dtex, the elongation at break is 123 +/-4%, the yarn unevenness is less than or equal to 2.0%, the oil content is 0.3-0.5%, and the heat conductivity coefficient lambda is less than or equal to 0.04W/m.K; the hollowness of the POY is 16-17%, the hollowness of the DTY after texturing is 15-16%, and the reduction rate of the hollowness is less than or equal to 6.1%.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention includes equivalent technical means that can be conceived by those skilled in the art based on the inventive concepts.
Claims (7)
1. The utility model provides a spinneret of double-deck cavity orifice which characterized in that: the spinneret plate comprises a spinneret plate body and spinneret orifice units, wherein a plurality of spinneret orifice units distributed in a concentric circle shape are arranged on the spinneret plate body, each spinneret orifice unit is formed by a plurality of micropores in a rotational symmetry mode, each micropore comprises an outer arc section and an inner Y-shaped support, and the tail end of each inner Y-shaped support is connected to the center of the inner wall of the depression of the outer arc section and arranged along the radial direction of the base circle where the outer arc section is located; the micropores are jointly spliced into a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular polygonal ring, and a micro-gap is reserved between every two adjacent micropores.
2. The spinneret plate with double-layer hollow nozzle hole according to claim 1, wherein: the outer end of the outer arc section of the micropore and the head part at the same side of the inner Y-shaped support are both positioned on the same radius of the base circle where the outer arc section is positioned.
3. The spinneret plate with double-layer hollow nozzle hole according to claim 2, wherein: the symmetry axes of the inner Y-shaped supports are jointly intersected at the center of the base circle where the outer arc section is located.
4. The spinneret plate with double-layer hollow nozzle hole according to claim 3, wherein: the front ends of the inner Y-shaped supporting heads are positioned on the same base circle which takes the center of the spinneret orifice unit as the center of a circle.
5. The spinneret plate with double-layer hollow nozzle hole according to claim 4, wherein: the spinneret orifice unit is formed by three microporous structures in a rotational symmetry mode, the rotation angle is 120 degrees, and the three microporous structures are jointly spliced into a double-layer hollow structure with an outer ring being a circular ring and an inner ring being a regular triangle ring.
6. The spinneret plate with double-layer hollow nozzle hole according to claim 1, wherein: the width of the micro-slit is 0.2 mm.
7. The spinneret plate with double-layer hollow nozzle hole according to claim 6, wherein: the width of the spinneret orifice unit is 0.02-0.1mm, the length of each side of the inner Y-shaped support is 0.06-0.3mm, the included angle towards the center is 60 degrees, and the other two included angles are both 120 degrees; the length of the outer circular arc section is 0.35-1.7mm, and the radius is 0.18-0.9 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021682527.4U CN212983110U (en) | 2020-08-13 | 2020-08-13 | Spinneret plate with double-layer hollow spray holes |
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| CN202021682527.4U CN212983110U (en) | 2020-08-13 | 2020-08-13 | Spinneret plate with double-layer hollow spray holes |
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| CN212983110U true CN212983110U (en) | 2021-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286592A (en) * | 2023-11-27 | 2023-12-26 | 江苏富之岛美安纺织品科技有限公司 | Heart-shaped four-hollow anti-deformation polylactic acid fiber and spinneret plate thereof |
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2020
- 2020-08-13 CN CN202021682527.4U patent/CN212983110U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286592A (en) * | 2023-11-27 | 2023-12-26 | 江苏富之岛美安纺织品科技有限公司 | Heart-shaped four-hollow anti-deformation polylactic acid fiber and spinneret plate thereof |
| CN117286592B (en) * | 2023-11-27 | 2024-03-22 | 江苏富之岛美安纺织品科技有限公司 | Spinneret plate for producing heart-shaped four-hollow anti-deformation polylactic acid fibers |
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