CN107245811B - Production process of spunbonded nonwoven fabric - Google Patents
Production process of spunbonded nonwoven fabric Download PDFInfo
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- CN107245811B CN107245811B CN201710455432.5A CN201710455432A CN107245811B CN 107245811 B CN107245811 B CN 107245811B CN 201710455432 A CN201710455432 A CN 201710455432A CN 107245811 B CN107245811 B CN 107245811B
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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
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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
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
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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
- D04H3/08—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)
- Nonwoven Fabrics (AREA)
Abstract
The invention provides a production process of a spunbonded non-woven fabric, which comprises the Processes of Polypropylene (PP), heating and melting, filtering, metering, split-flow spinning, cooling and drafting, split-flow lapping, rolling mill thermal bonding, winding, slitting and packaging, wherein the process is improved by researching a bonding point of a patterned roller: the arrangement pattern, size, height, gradient and the like of the bonding points improve the bonding depth, gradient and bonding area on the basis of ensuring the bonding strength of the non-woven fabric, thereby improving the bulkiness and softness of the non-woven fabric. The improvement of the bonding structure of the invention can improve the bulkiness and softness of the non-woven fabric, and ensure that the strength of the original non-woven fabric is hardly reduced under the condition of reducing bonding pressure, thereby reducing the power consumption, and simultaneously the equipment is convenient to install and operate.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a production process of a non-woven fabric by a spunbond method.
Background
Spunbond nonwovens are formed by laying continuous filaments in a random pattern on a moving conveyor. In a typical spunbond process, resin particles are heated to melt and then fed through a spinneret to produce thousands of elongated filaments, fluid jets (e.g., air) draw the fibers, which are then blown or otherwise conveyed onto a moving web where they are laid in a random pattern and drawn across the web to form a fabric, which then passes through a bonding station.
The bonding station typically includes a smooth roll and a bonding roll (patterned roll) that forms a series of identical raised spots (bond points) on the nonwoven web after the irregular fiber web passes over the bonding roll.
The existing bonding structure has higher requirement on bonding pressure, and the produced nonwoven fabric has low softness.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a production process of a spun-bonded non-woven fabric, and realizes an improved non-woven fabric with fluffy and soft properties.
The technical scheme of the invention is as follows:
a production process of spunbonded nonwoven fabric comprises the Processes of Polypropylene (PP), heating and melting, filtering, metering, split-flow spinning, cooling and drafting, split-yarn lapping, rolling and hot bonding, winding and slitting, packaging and warehousing, and specifically comprises the following steps:
1) the polypropylene (PP) is pumped to a feeding system of the large screw extruder through a vacuum device, and the polypropylene enters the large screw extruder under the action of gravity;
2) melting and mixing polypropylene by a large screw extruder, and gradually conveying the polypropylene forward to a melt filtering device;
3) filtering impurities affecting spinning in polypropylene by using a filtering device, accurately metering the melt by using a metering pump, and conveying the melt to a spinning die head according to a set quantity;
4) the melt keeps the flow of the melt at each position consistent through a distribution plate on a spinning die head, and after the melt enters a spinneret plate, the melt is spun into nascent fiber through a spinneret plate hole under the action of pressure;
5) cooling and drafting the fiber by cold air, and gradually cooling and stretching the fiber to obtain the required fiber;
6) continuously and disorderly laying fibers on a forward-running mesh belt under the airflow dispersion action of a filament splitter to form a fiber mesh;
7) after the fiber web passes through the hot rolling mill, the fiber web is subjected to local melting hot rolling, so that certain strength is given to the fiber web to form the non-woven fabric;
8) and continuously winding the non-woven fabric into a roll by a winding machine, slitting according to the requirements of users, marking, packaging and warehousing.
The hot rolling mill include the hot roll, the hot roll includes smooth roll and bonding roller, the smooth roll laminating is on the bonding roller surface, bonding rolling point for the cross-section for trapezoidal and upper and lower bottom surface be oval-shaped's cone, the smooth roll is arranged with the hot roll array that the bonding roller that constitutes by the bonding rolling point of countless bonding rolling point and is constituted bonding structure together, the contained angle between the major axis of its cone oval bottom surface of horizontal adjacent bonding rolling point is 25-35, the major axis of its cone oval bottom surface of vertical adjacent bonding rolling point is parallel to each other.
Preferably, the distance between the cone foci of the transversely and/or vertically adjacent bonding nips is 1.45-1.55 mm.
Further, the distance between cone foci of the transversely and/or vertically adjacent bonding rolls is 1.52 mm.
Preferably, the long axis of the upper bottom surface of the cone of the bonding rolling point is 0.7-0.8mm, the short axis is 0.4-0.5mm, the height of the cone is 0.45-0.55mm, and the taper is 25-35 degrees.
Furthermore, the long axis of the upper bottom surface of the cone of the bonding rolling point is 0.78mm, the short axis is 0.46mm, the height of the cone is 0.5mm, and the taper is 30 degrees.
Preferably, the angle between the major axes of the conical elliptical bases of the transversely adjacent bonding nips is 30 °.
When the fiber web enters the hot bonding process flow, the hot rolling mill bonding roller and the smooth roller provide bonding temperature and pressure, the bonding temperature and the pressure are transmitted to the moving fiber web, and the fiber web is fused and bonded according to the depth and the gradient of a rolling point on the hot rolling roller to achieve a certain bonding area. Because the fiber lapping has a certain rule in the longitudinal direction and the transverse direction, the number of longitudinal fibers is large in general condition, the number of transverse fibers is small, the inclination of a rolling point is changed on the basis of reducing the area to be hot rolled, and the improvement or the maintenance of the strength of a bonded product is facilitated; meanwhile, according to the bonding depth and bonding area of the changed roll points, the fiber net is ensured to have a certain fluffy effect after bonding; and the hot rolling points reduce the melting area of the fiber web, so that the product has obvious soft feeling. Finally, the product with the bonding structure not only ensures the original strength of the product, but also has certain fluffy and soft effects.
The invention is improved by researching the bonding points of the embossing roller: the arrangement pattern, size, height, gradient and the like of the bonding points improve the bonding depth, gradient and bonding area on the basis of ensuring the bonding strength of the non-woven fabric, thereby improving the bulkiness and softness of the non-woven fabric. The improvement of the bonding structure of the invention can improve the bulkiness and softness of the non-woven fabric, and ensure that the strength of the original non-woven fabric is hardly reduced under the condition of reducing bonding pressure, thereby reducing the power consumption, and simultaneously the equipment is convenient to install and operate.
Drawings
FIG. 1 is a schematic diagram of the construction of the hot mill bonding roll of the present invention;
FIG. 2 is a schematic structural view of the hot roll of the hot rolling mill of the present invention;
FIG. 3 is a schematic view taken from the direction A-A of FIG. 1;
FIG. 4 is a schematic view of FIG. 1 taken along line B-B;
in the figure, 1, a bonding roller, 2, a fiber fabric, 3 and a smooth roller.
Detailed Description
For a better understanding of the present invention, reference will now be made to the following examples which are set forth to illustrate, but are not to be construed to limit the present invention.
A production process of non-woven fabric by a spun-bond method comprises the following steps,
1) the polypropylene (PP) is pumped to a feeding system of the large screw extruder through a vacuum device, and the polypropylene enters the large screw extruder under the action of gravity;
2) melting and mixing polypropylene by a large screw extruder, and gradually conveying the polypropylene forward to a melt filtering device;
3) filtering impurities affecting spinning in polypropylene by using a filtering device, accurately metering the melt by using a metering pump, and conveying the melt to a spinning die head according to a set quantity;
4) the melt keeps the flow of the melt at each position consistent through a distribution plate on a spinning die head, and after the melt enters a spinneret plate, the melt is spun into nascent fiber through a spinneret plate hole under the action of pressure;
5) cooling and drafting the fiber by cold air, and gradually cooling and stretching the fiber to obtain the required fiber;
6) continuously and disorderly laying fibers on a forward-running mesh belt under the airflow dispersion action of a filament splitter to form a fiber mesh;
7) after the fiber web passes through the hot rolling mill, the fiber web is subjected to local melting hot rolling, so that certain strength is given to the fiber web to form the non-woven fabric;
8) and continuously winding the non-woven fabric into a roll by a winding machine, slitting according to the requirements of users, marking, packaging and warehousing.
The hot rolling mill include the hot roll, the hot roll includes smooth roll 3 and bonding roller 1, smooth roll 3 laminating is on 1 surface of bonding roller, 1 nip of bonding roller be trapezoidal and upper and lower bottom surface for oval-shaped cone for the cross-section, the hot roll array that smooth roll 3 and bonding roller 1 constitute is arranged together and is constituted bonding structure, the contained angle between the major axis of the oval bottom surface of the cone of horizontal adjacent bonding nip is 25-35, the major axis of the oval bottom surface of its cone of vertical adjacent bonding roller 1 nip is parallel to each other.
The distance between the cone focuses of the transversely and/or vertically adjacent bonding rolls is 1.52 mm.
The long axis of the upper bottom surface of the cone of the bonding rolling point is 0.78mm, the short axis is 0.46mm, the height of the cone is 0.5mm, and the taper is 30 degrees.
Table 1 compares the new nip and the conventional nip bonding roll product test data, and by comparison, it can be found that the original strength of the nonwoven fabric is hardly reduced with a reduced bonding pressure.
TABLE 1
The embodiments described above are merely exemplary of the present invention and are not intended to limit the present invention in any way, and any person skilled in the art may make variations or modifications to the embodiments described above, which are equivalent to changes in the technical content disclosed above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the present invention, unless the technical essence of the present invention departs from the content of the technical solution of the present invention.
Claims (5)
1. A production process of non-woven fabric by a spun-bond method is characterized by comprising the following steps,
1) the polypropylene (PP) is pumped to a feeding system of the large screw extruder through a vacuum device, and the polypropylene enters the large screw extruder under the action of gravity;
2) melting and mixing polypropylene by a large screw extruder, and gradually conveying the polypropylene forward to a melt filtering device;
3) filtering impurities affecting spinning in polypropylene by using a filtering device, accurately metering the melt by using a metering pump, and conveying the melt to a spinning die head according to a set quantity;
4) the melt keeps the flow of the melt at each position consistent through a distribution plate on a spinning die head, and after the melt enters a spinneret plate, the melt is spun into nascent fiber through a spinneret plate hole under the action of pressure;
5) cooling and drafting the fiber by cold air, and gradually cooling and stretching the fiber to obtain the required fiber;
6) continuously and disorderly laying fibers on a forward-running mesh belt under the airflow dispersion action of a filament splitter to form a fiber mesh;
7) after the fiber web passes through the hot rolling mill, the fiber web is subjected to local melting hot rolling, so that certain strength is given to the fiber web to form the non-woven fabric; the hot rolling mill comprises a hot rolling roll, the hot rolling roll comprises a smooth roll and a bonding roll, the smooth roll is attached to the surface of the bonding roll, the rolling points on the bonding roll are cones with trapezoidal sections and elliptical upper and lower bottom surfaces, the smooth roll and the hot rolling roll formed by the bonding rolls consisting of a plurality of bonding rolling points are arranged together in an array mode to form a bonding structure, the included angle between the long axes of the elliptical bottom surfaces of the cones of the transverse adjacent bonding rolling points is 25-35 degrees, and the long axes of the elliptical bottom surfaces of the cones of the vertical adjacent bonding rolling points are parallel to each other;
8) and continuously winding the non-woven fabric into a roll by a winding machine, slitting according to the requirements of users, marking, packaging and warehousing.
2. A spunbond nonwoven production process as claimed in claim 1, wherein the distance between the cone foci of the transversely and/or vertically adjacent bonding nips is 1.45-1.55 mm.
3. The process of claim 1 or 2, wherein the bonding nip has a cone with a top and bottom surface with a major axis of 0.7-0.8mm, a minor axis of 0.4-0.5mm, a cone height of 0.45-0.55mm, and a taper angle of 25-35 °.
4. The process of claim 3 wherein the bonding nip cones have a top base surface with a major axis of 0.78mm and a minor axis of 0.46mm, a cone height of 0.5mm and a cone taper of 30 °.
5. A spunbond nonwoven production process as claimed in claim 1, wherein the major axes of the elliptical bases of the cones of the transversely adjacent bonding nips are at an angle of 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710455432.5A CN107245811B (en) | 2017-06-16 | 2017-06-16 | Production process of spunbonded nonwoven fabric |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710455432.5A CN107245811B (en) | 2017-06-16 | 2017-06-16 | Production process of spunbonded nonwoven fabric |
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| CN107245811A CN107245811A (en) | 2017-10-13 |
| CN107245811B true CN107245811B (en) | 2020-10-20 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103669A (en) * | 2017-12-29 | 2018-06-01 | 嘉兴市宏景无纺面料有限公司 | A kind of embossing non-woven fabrics |
| CN108532130A (en) * | 2018-04-24 | 2018-09-14 | 浙江金三发非织造布有限公司 | A kind of extremely soft non-woven fabrics and its production technology |
| CN109023718B (en) * | 2018-08-28 | 2020-12-25 | 山东斯维特新材料科技有限公司 | Hot rolling mill roller and non-woven fabric prepared by same |
| CN115748106A (en) * | 2022-11-18 | 2023-03-07 | 湖北金龙非织造布有限公司 | Preparation method of single-component polyethylene spun-bonded non-woven fabric |
Citations (7)
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| JPH0892856A (en) * | 1994-09-19 | 1996-04-09 | Mitsubishi Chem Corp | Production of nonwoven fabric excellent in flexibility |
| CN101245539A (en) * | 2007-06-08 | 2008-08-20 | 东华大学 | Pattern structure of engraved roll in hot rolling mill |
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| CN103757822A (en) * | 2014-01-28 | 2014-04-30 | 嘉兴学院 | Bubble type flexible non-woven cloth and manufacturing method thereof |
| CN104480642A (en) * | 2014-12-05 | 2015-04-01 | 柳州市威腾汽车配件厂 | Preparation technology of non-woven fabrics |
| CN106498627A (en) * | 2016-10-10 | 2017-03-15 | 天鼎丰材料技术有限公司 | The production system of polypropylene spun-bonded needle-punched geotextiles, production method |
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2017
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0892856A (en) * | 1994-09-19 | 1996-04-09 | Mitsubishi Chem Corp | Production of nonwoven fabric excellent in flexibility |
| CN101245539A (en) * | 2007-06-08 | 2008-08-20 | 东华大学 | Pattern structure of engraved roll in hot rolling mill |
| CN101544792A (en) * | 2009-05-05 | 2009-09-30 | 山东俊富无纺布有限公司 | Production formula and production process of non-woven fabrics for medical healthcare |
| CN102587068A (en) * | 2012-03-07 | 2012-07-18 | 金红叶纸业集团有限公司 | Rubbing roller, embossing process applying rubbing roller and embossed wet tissue prepared by embossing process |
| CN103757822A (en) * | 2014-01-28 | 2014-04-30 | 嘉兴学院 | Bubble type flexible non-woven cloth and manufacturing method thereof |
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