CN111118740A - Coarse denier polypropylene spun-bonded non-woven fabric and preparation method thereof - Google Patents
Coarse denier polypropylene spun-bonded non-woven fabric and preparation method thereof Download PDFInfo
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- CN111118740A CN111118740A CN202010081685.2A CN202010081685A CN111118740A CN 111118740 A CN111118740 A CN 111118740A CN 202010081685 A CN202010081685 A CN 202010081685A CN 111118740 A CN111118740 A CN 111118740A
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- Prior art keywords
- polypropylene
- woven fabric
- spinning
- temperature
- coarse denier
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- 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
- D01D5/08—Melt spinning methods
-
- 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
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof, wherein polypropylene with a low melt index is used as a spinning raw material, the preparation method comprises the steps of melting polypropylene slices with a melt index of 5-7 by a screw extruder, and controlling the temperature to be 190-255 ℃; enabling the processed polypropylene slices to pass through a spinning manifold and a spinning assembly, controlling the temperature of the spinning manifold and the temperature of the spinning assembly to be 210-230 ℃, extruding the polypropylene slices through a spinning assembly with a spinneret plate aperture of 0.3-0.8 mm, and controlling the temperature of cross air blowing to be 10-21 ℃; drawing the filaments from the spinneret plate by air flow at the speed of 2000-5000 m/min to form filaments which are uniformly spread into a fiber web; the prepared web was extruded through a specially designed hot roll.
Description
Technical Field
The invention relates to the technical field of non-woven fabric preparation processes, in particular to a coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof.
Background
With the popularization of the spun-bonded non-woven fabric, the spun-bonded non-woven fabric is developed in the markets of composite supporting materials, packaging materials, geotechnical building materials, filtering materials and the like. Particularly, as people's environmental awareness increases, the market demand for filter materials continues to increase. The coarse denier PET spunbonded nonwoven developed for the filtration market is applied, but the existing coarse denier PET spunbonded nonwoven on the market has the problems that the PET material is not acid-resistant and has higher cost. Although the PP (polypropylene) material has good acid and alkali resistance, the PP filaments meeting the thickness requirement of the thick denier spunbonded nonwoven fabric cannot be processed according to the common process.
Therefore, the invention discloses a coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof, so as to solve the problems in the background technology.
In order to realize the purpose, the invention provides the following technical scheme: a coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof, wherein polypropylene with low melt index is used as a spinning raw material, and the preparation method specifically comprises the following steps:
the method comprises the following steps: enabling polypropylene chips with the melt index of 5-7 to pass through a spinning manifold and a spinning assembly, controlling the temperature of the spinning manifold and the temperature of the spinning assembly to be 210-230 ℃, extruding the polypropylene chips through a spinning assembly with a spinneret plate aperture of 0.3-0.8 mm, and controlling the temperature of cross air blowing to be 10-21 ℃;
step two: drawing the filaments from the spinneret plate in the step two by air flow at the speed of 2000-5000 m/min to form a fiber web, and uniformly paving the filaments into the fiber web, wherein the speed of the web curtain is controlled to be 20-300 m/min according to different thicknesses of products;
step three: and (3) extruding the fiber web prepared in the third step through a specially designed hot roller to melt the polypropylene on the surface layer of the fiber web, forming bonding points among fibers on the fiber web, and then solidifying the fiber web to form the coarse denier polypropylene spun-bonded non-woven fabric.
Preferably, the specially designed hot roll comprises an upper roll and a lower roll, wherein the upper roll is a steel roll, the pattern depth is controlled to be 0.8-1.2mm, and the temperature is controlled to be 130-160 ℃; the lower roller is a steel roller, and the temperature is controlled to be 130-160 ℃.
Preferably, the spinneret plate in the second step adopts an improved spinneret plate for spinning, the spinneret plate has the characteristics of less spinneret hole number, large pore diameter and large length-diameter ratio, the pore diameter of the spinneret hole is 0.3-0.8 mm, and the length-diameter ratio is 4-10.
Preferably, the fiber webs laid by the fibers of the non-woven fabric in the third step are bonded by a hot roll to form the fiber webs, the fiber webs are thermally bonded to form the non-woven fabric, the depth of a roll point is not more than 16-22 mm, and the area of a single roll point is 100-400 mm2The total area of the rolling points accounts for 5-9% of the area of the non-woven fabric.
Preferably, the mass per unit area of the non-woven fabric is 15-150 g/square meter, and the air permeability is 800-.
Compared with the prior art, the invention has the beneficial effects that:
1. taking polypropylene slices as spinning raw materials, and improving a spinneret plate into a spinneret hole with the aperture of 0.3-0.8 mm and the length-diameter ratio of 4-10, wherein the used spinneret plate has the characteristics of small number of spinneret holes, large aperture and large length-diameter ratio; the technological parameters are optimized, the temperatures of the spinning box body and the spinning assembly are controlled to be 210-230 ℃, and the temperature of the cross air blow is controlled to be 10-21 ℃; the raw material can be processed to form the coarse denier filament stably, compared with the common bicomponent coarse denier spun-bonding technology, the requirement of the process equipment is lower, and therefore the cost of the coarse denier polypropylene spun-bonded non-woven fabric can be relatively reduced.
2. Carrying out a thermal bonding reinforcement process by adopting a specially designed hot roll, wherein the specially designed hot roll comprises an upper roll and a lower roll, the upper roll and the lower roll are both steel rolls, the pattern depth is controlled to be 0.8-1.2mm, and the temperature is controlled to be 130-160 ℃; the rolling points generated on the cloth surface have the characteristics of small size, shallow size and less quantity, and are more fluffy, small in fineness and high in softness compared with the hot-rolled non-woven fabric with the same square gram weight.
3. The polypropylene with low melt index is used as a spinning raw material, and the acid and alkali resistance of the whole coarse denier polypropylene spun-bonded non-woven fabric is improved due to the excellent acid and alkali resistance of the polypropylene material.
4. The polypropylene with low melt index is selected as a spinning raw material, the process temperature and air draft are controlled, the parameters of a spinneret plate are designed, and the defect that the polypropylene material is difficult to make coarse denier spun-bonded non-woven fabric is overcome by a forming consolidation method.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof, wherein polypropylene with low melt index is used as a spinning raw material, and the preparation method specifically comprises the following steps:
the method comprises the following steps: polypropylene slices with the melt index of 5 pass through a spinning manifold and a spinning assembly, the temperature of the spinning manifold and the temperature of the spinning assembly are both controlled to be 210 ℃, the polypropylene slices are extruded by the spinning assembly with the aperture of a spinneret plate being 0.3mm, and the temperature of cross air is controlled to be the filaments obtained from the spinneret plate at 10 ℃;
step two: drawing the filaments from the spinneret plate in the step two by using air flow, wherein the drawing speed of the air flow is 2000m/min, uniformly paving the formed filaments into a fiber web, and controlling the speed of the mesh curtain to be 20m/min according to different thicknesses of products;
step three: and (3) extruding the fiber web prepared in the third step through a specially designed hot roller to melt the polypropylene on the surface layer of the fiber web, forming bonding points among fibers on the fiber web, and then solidifying the fiber web to form the coarse denier polypropylene spun-bonded non-woven fabric.
In the embodiment, the specially designed hot roll comprises an upper roll and a lower roll, wherein the upper roll is a steel roll, the pattern depth is controlled to be 0.8mm, and the temperature is controlled to be 130-160 ℃; the lower roller is a steel roller, and the temperature is controlled to be 130-160 ℃.
In this embodiment, the spinneret in the second step adopts an improved spinneret to spin, and the spinneret has the characteristics of less spinneret holes, large aperture and large length-diameter ratio, wherein the aperture of the spinneret hole is 0.3-0.8 mm, and the length-diameter ratio is 4-10.
In the embodiment, the fiber webs laid by the fibers of the non-woven fabric in the third step are bonded by a hot roll to form the fiber webs, the fiber webs are thermally bonded to form the non-woven fabric, the depth of the rolling points is not more than 16-22 mm, and the area of each rolling point is 100-400 mm2The total area of the rolling points accounts for 5-9% of the area of the non-woven fabric.
In the embodiment, the mass per unit area of the non-woven fabric is 15-150 g per square meter, and the air permeability is 800 cfm.
Example 2
A coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof, wherein polypropylene with low melt index is used as a spinning raw material, and the preparation method specifically comprises the following steps:
the method comprises the following steps: polypropylene slices of polypropylene with a melt index of 7 pass through a spinning manifold and a spinning assembly, the temperature of the spinning manifold and the temperature of the spinning assembly are both controlled to be 230 ℃, the polypropylene slices are extruded through a spinning assembly with a spinneret plate aperture of 0.8mm, and the temperature of cross air blow is controlled to be the filament from the spinneret plate at 21 ℃;
step two: drawing the filaments from the spinneret plate in the step two by airflow at the speed of 5000m/min to form filaments, uniformly paving the filaments into a fiber web, and controlling the speed of the mesh curtain to be 300m/min according to different thicknesses of products;
step three: and (3) extruding the fiber web prepared in the third step through a specially designed hot roller to melt the polypropylene on the surface layer of the fiber web, forming bonding points among fibers on the fiber web, and then solidifying the fiber web to form the coarse denier polypropylene spun-bonded non-woven fabric.
In the embodiment, the specially designed hot roll comprises an upper roll and a lower roll, wherein the upper roll is a steel roll, the pattern depth is controlled to be 1.2mm, and the temperature is controlled to be 130-160 ℃; the lower roller is a steel roller, and the temperature is controlled to be 130-160 ℃.
In this embodiment, the spinneret in the second step adopts an improved spinneret to spin, and the spinneret has the characteristics of less spinneret holes, large aperture and large length-diameter ratio, wherein the aperture of the spinneret hole is 0.3-0.8 mm, and the length-diameter ratio is 4-10.
In the embodiment, the fiber webs laid by the fibers of the non-woven fabric in the third step are bonded by a hot roll to form the fiber webs, the fiber webs are thermally bonded to form the non-woven fabric, the depth of the rolling points is not more than 16-22 mm, and the area of each rolling point is 100-400 mm2The total area of the rolling points accounts for 5-9% of the area of the non-woven fabric.
In the embodiment, the mass per unit area of the non-woven fabric is 15-150 g per square meter, and the air permeability is 1000 cfm.
Example 3
A coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof, wherein polypropylene with low melt index is used as a spinning raw material, and the preparation method specifically comprises the following steps:
the method comprises the following steps: polypropylene slices with the melt index of 6 pass through a spinning manifold and a spinning assembly, the temperature of the spinning manifold and the temperature of the spinning assembly are both controlled to be 220 ℃, the polypropylene slices are extruded by the spinning assembly with the pore diameter of a spinneret plate being 0.55mm, and the temperature of side blowing is controlled to be filaments obtained from the spinneret plate at 15.5 ℃;
step two: drawing the filaments from the spinneret plate in the step two by airflow at the airflow drawing speed of 3500m/min to form a fiber web, and uniformly paving the filaments into the fiber web, wherein the speed of the web curtain is controlled to be 160m/min according to different thicknesses of products;
step three: and (3) extruding the fiber web prepared in the third step through a specially designed hot roller to melt the polypropylene on the surface layer of the fiber web, forming bonding points among fibers on the fiber web, and then solidifying the fiber web to form the coarse denier polypropylene spun-bonded non-woven fabric.
In the embodiment, the specially designed hot roll comprises an upper roll and a lower roll, wherein the upper roll is a steel roll, the pattern depth is controlled to be 0.9mm, and the temperature is controlled to be 130-160 ℃; the lower roller is a steel roller, and the temperature is controlled to be 130-160 ℃.
In this embodiment, the spinneret in the second step adopts an improved spinneret to spin, and the spinneret has the characteristics of less spinneret holes, large aperture and large length-diameter ratio, wherein the aperture of the spinneret hole is 0.3-0.8 mm, and the length-diameter ratio is 4-10.
In the embodiment, the fiber webs laid by the fibers of the non-woven fabric in the third step are bonded by a hot roll to form the fiber webs, the fiber webs are thermally bonded to form the non-woven fabric, the depth of the rolling points is not more than 16-22 mm, and the area of each rolling point is 100-400 mm2The total area of the rolling points accounts for 5-9% of the area of the non-woven fabric.
In the embodiment, the mass per unit area of the non-woven fabric is 15-150 g/square meter, and the air permeability is 900 cfm.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A coarse denier polypropylene spun-bonded non-woven fabric and a preparation method thereof are characterized in that: the preparation method of the polypropylene fiber with low melt index by taking polypropylene with low melt index as a spinning raw material specifically comprises the following steps:
the method comprises the following steps: enabling polypropylene chips with the melt index of 5-7 to pass through a spinning manifold and a spinning assembly, controlling the temperature of the spinning manifold and the temperature of the spinning assembly to be 210-230 ℃, extruding the polypropylene chips through a spinning assembly with a spinneret plate aperture of 0.3-0.8 mm, and controlling the temperature of cross air blowing to be 10-21 ℃;
step two: drawing the filaments from the spinneret plate in the step two by air flow at the speed of 2000-5000 m/min to form a fiber web, and uniformly paving the filaments into the fiber web, wherein the speed of the web curtain is controlled to be 20-300 m/min according to different thicknesses of products;
step three: and (3) extruding the fiber web prepared in the third step through a specially designed hot roller to melt the polypropylene on the surface layer of the fiber web, forming bonding points among fibers on the fiber web, and then solidifying the fiber web to form the coarse denier polypropylene spun-bonded non-woven fabric.
2. A coarse denier polypropylene spunbond nonwoven as in claim 1, wherein: the specially designed hot roll comprises an upper roll and a lower roll, wherein the upper roll is a steel roll, the pattern depth is controlled to be 0.8-1.2mm, and the temperature is controlled to be 130-160 ℃; the lower roller is a steel roller, and the temperature is controlled to be 130-160 ℃.
3. A coarse denier polypropylene spunbond nonwoven as in claim 1, wherein: and the spinneret plate in the second step adopts an improved spinneret plate for spinning, and the spinneret plate has the characteristics of less spinneret hole number, large pore diameter and large length-diameter ratio, wherein the pore diameter of the spinneret hole is 0.3-0.8 mm, and the length-diameter ratio is 4-10.
4. A coarse denier polypropylene spunbond nonwoven as in claim 1, wherein: the fiber webs laid by the fibers of the non-woven fabric in the third step are bonded by a hot roller to form the fiber webs, the fiber webs are thermally bonded to form the non-woven fabric, the depth of a roll point is not more than 16-22 mm, and the area of a single roll point is 100-400 mm2The total area of the rolling points accounts for 5-9% of the area of the non-woven fabric.
5. A coarse denier polypropylene spunbond nonwoven as in claim 1, wherein: the mass per unit area of the non-woven fabric is 15-150 g/square meter, and the air permeability is 800-1000 cfm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010081685.2A CN111118740A (en) | 2020-02-06 | 2020-02-06 | Coarse denier polypropylene spun-bonded non-woven fabric and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010081685.2A CN111118740A (en) | 2020-02-06 | 2020-02-06 | Coarse denier polypropylene spun-bonded non-woven fabric and preparation method thereof |
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| CN111118740A true CN111118740A (en) | 2020-05-08 |
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| CN202010081685.2A Pending CN111118740A (en) | 2020-02-06 | 2020-02-06 | Coarse denier polypropylene spun-bonded non-woven fabric and preparation method thereof |
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| CN1818158A (en) * | 2005-06-27 | 2006-08-16 | 江苏泽天化纤有限公司 | High strength and low extending thick Denier polypropylene yarns and production thereof |
| CN101498080A (en) * | 2008-12-31 | 2009-08-05 | 温州市瓯海昌隆化纤制品厂 | Coarse denier terylene spunbonded filament nonwoven fabric and manufacturing method thereof |
| CN105586720A (en) * | 2014-10-24 | 2016-05-18 | 张家港骏马无纺布有限公司 | Soft SMS composite non-woven material and manufacturing method thereof |
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| CN108754644A (en) * | 2018-06-29 | 2018-11-06 | 东华大学 | High-strength thick denier polypropylene spun-bonded continuous yarn of one kind and preparation method thereof |
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2020
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