CN111114056A - Spun-bonded composite non-woven fabric and manufacturing method thereof - Google Patents
Spun-bonded composite non-woven fabric and manufacturing method thereof Download PDFInfo
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- CN111114056A CN111114056A CN202010052551.8A CN202010052551A CN111114056A CN 111114056 A CN111114056 A CN 111114056A CN 202010052551 A CN202010052551 A CN 202010052551A CN 111114056 A CN111114056 A CN 111114056A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- 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
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
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- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a spun-bonded composite non-woven fabric and a manufacturing method thereof, wherein the upper layer of the spun-bonded composite non-woven fabric is a fiber net formed by mutually bonding two-component spun-bonded long fibers through the fusion of the surfaces of the fibers, the two-component spun-bonded long fibers are composed of high-melting point resin and low-melting point resin with the melting points different by more than 20 ℃, and the surfaces of the two-component spun-bonded long fibers contain resin with high melting point and low melting pointA low melting point resin; the lower layer of the spun-bonded composite non-woven fabric is 5-10g/m in gram weight2The nonwoven fabric of (1). Because the upper layer fiber web is composed of the bicomponent spun-bonded long fibers, the fibers are easy to curl after being heated due to different contraction forces of the two thermoplastic resins in the heating device, and bonding points among the fibers are fewer after the fibers are consolidated into the spun-bonded non-woven fabric, so that the softness and the bulkiness of the spun-bonded non-woven fabric are increased.
Description
Technical Field
The invention relates to the field of non-woven fabrics, in particular to a spun-bonded composite non-woven fabric applied to personal care and infant care and a manufacturing method thereof.
Background
Non-woven fabrics, also known as non-woven fabrics, are widely used in the industry of disposable hygienic products due to their characteristics of simple production process, high yield, low cost, softness, skin friendliness and the like. The spun-bonded non-woven fabric is usually formed by thermoplastic resin through an extruder and a spinneret plate to form long fibers, the long fibers are laid into a net, and a metal hot roller is adopted to perform local hot rolling and bonding on the non-woven fabric fibers. However, most of the existing spun-bonded non-woven fabrics are single-component spun-bonded long fibers, so that the fibers are not easy to curl, the fibers are tighter after being laid, the formed spun-bonded non-woven fabrics are smaller in three-dimensional thickness and not fluffy, the formed spun-bonded non-woven fabrics are smaller in three-dimensional thickness and poorer in fluffiness, and certain influence is generated on the softness of the spun-bonded non-woven fabrics.
Disclosure of Invention
The invention aims to provide a soft and fluffy spunbonded composite non-woven fabric and a manufacturing method thereof, and overcomes the defects of the existing product and the production method.
In order to achieve the above purpose, the solution of the invention is:
a spun-bonded composite nonwoven fabric comprises an upper layer and a lower layer, wherein the upper layer is formed by bonding bicomponent spun-bonded long fibers into a fiber web through the surface melting of the fibers, and the gram weight of the upper layer is 5-10g/m2A lower layer of non-woven fabric; the two-component spun-bonded long fiber on the upper layer consists of high-melting-point resin and low-melting-point resin with the melting points different by more than 20 ℃, and the surface of the two-component spun-bonded long fiber contains the low-melting-point resin. The two-component spun-bonded long fiber is a two-component sheath-core spun-bonded long fiber, a two-component orange petal spun-bonded long fiber or a two-component parallel spun-bonded long fiber.
The surface layer of the double-component sheath-core spun-bonded long fiber is low-melting-point resin, and the core layer is high-melting-point resin.
The lower-layer non-woven fabric is spun-bonded non-woven fabric or hot-air non-woven fabric.
A manufacturing method of spun-bonded composite non-woven fabric comprises the following specific steps:
(1) an upper fiber supply step: adopting a spunbond process, respectively heating two thermoplastic resins with the melting point difference of more than or equal to 20 ℃ through a hot melting extrusion device, melting the thermoplastic resins, then feeding the molten thermoplastic resins into a spinning device, changing high-temperature melt into melt trickle in the spinning device, and then ejecting the melt trickle through two-component spinneret orifices on a spinneret plate to form coarse two-component spunbond long fibers; cooling by side-blown cold air, and forming the double-component spun-bonded long fiber by a drafting device;
(2) a lower-layer nonwoven fabric supply step: conveying the non-woven fabric to an outlet of an upper layer fiber supply process through a guide roller;
(3) a net stacking procedure: the two-component spun-bonded long fibers are superposed with the non-woven fabric at the outlet of the upper-layer fiber supply process to form a two-component spun-bonded long fiber net at the upper layer, and the overlapped composite net surface of the non-woven fabric at the lower layer;
(4) a molding procedure: the upper layer fiber net and the lower layer non-woven fabric are consolidated together by the overlapped composite net surface through a heating device and then are rolled to form the spun-bonded composite non-woven fabric.
The bicomponent spinneret orifices on the spinneret plate in the step (1) are of a sheath-core type, a tangerine petal type or a parallel type.
And (2) unreeling the coiled non-woven fabric coil by an unreeling device and then conveying the coiled non-woven fabric coil to an outlet of an upper layer fiber supply process by a guide roller.
And (2) directly conveying the non-woven fabric produced on line to an outlet of an upper layer fiber supply process through a guide roller.
The heating device is a hot air oven, a hot roller or the combination of the hot air oven and the hot roller.
After the scheme is adopted, the upper layer fiber web of the spun-bonded composite non-woven fabric is composed of the two-component spun-bonded long fibers, and the fibers are easy to curl after being heated due to different contraction forces of the two thermoplastic resins in the heating device, so that after the two thermoplastic resins are consolidated into the spun-bonded non-woven fabric, bonding points among the fibers are fewer, and the softness and the bulkiness of the spun-bonded non-woven fabric are improved. Simultaneously, the mechanical properties of the spunbonded composite non-woven fabric can be improved by the lower-layer composite non-woven fabric, even the lower-layer composite non-woven fabric has better tensile strength under the condition of low gram weight, and the compressive capacity of the spunbonded composite non-woven fabric after rolling can also be improved.
Drawings
FIG. 1 is a cross-sectional view of a spunbonded composite nonwoven fabric according to example 1 of the present invention;
FIG. 2 is a schematic view showing the production of a spunbonded nonwoven fabric according to example 1 of the present invention;
FIG. 3A is a cross-sectional view of a cross-section of a bicomponent spunbond filament of the present invention, shown in FIG. 1;
FIG. 3B is a cross-sectional view of the bicomponent spunbond filament of the present invention, shown in FIG. 2;
FIG. 3C is a cross-sectional view of the bicomponent spunbond filament of the present invention, shown in cross-section in FIG. 3;
FIG. 4 is a cross-sectional view of a spunbonded composite nonwoven fabric according to example 2 of the present invention;
FIG. 5 is a schematic view showing the production of a spunbonded nonwoven fabric according to example 2 of the present invention;
FIG. 6 is a cross-sectional view of a spunbonded composite nonwoven fabric according to example 3 of the present invention;
fig. 7 is a schematic view showing the production of a spunbonded nonwoven fabric according to example 3 of the present invention.
Description of the symbols
Example 1:
1 spun-bonded composite non-woven fabric
11 bicomponent sheath-core spun- bonded filament 11a, 11b core layer
12 two-component side-by-side spun-bonded long fiber 12a and 12b
13 two-component orange-petal type spun-bonded long fiber 13a, first orange petal 13b and second orange petal
a1 upper layer b1 lower layer
c1 coarse two-component spun-bonded long fiber d1 two-component spun-bonded long fiber
A1 first Hot melt extrusion device A1' second Hot melt extrusion device
B1 spinning device C1 spinneret D1 side blowing cold air E1 drafting device
F1 hot air oven G1 guide roller H1 outlet
Example 2:
2 spun-bonded composite non-woven fabric
a2 upper layer b2 lower layer
c2 coarse two-component spun-bonded long fiber d2 two-component spun-bonded long fiber
e2 first roving viscose macrofiber e2 second roving viscose macrofiber
f2 first spun bond filament f 2' second spun bond filament
A2 first Hot melt extrusion device A2' second Hot melt extrusion device
B2 spinning device C2 spinneret D2 side blowing cold air E2 drafting device
F2 hot air oven G2 guide roller H2 outlet I2 hot roller
J2 third Hot melt extrusion device J2' fourth Hot melt extrusion device
K2 first spinning device K2' second spinning device
M2 first side blowing cold air M2' second side blowing cold air
N2 first drafting device N2' second drafting device
O2 net curtain
Example 3:
3 spun-bonded composite non-woven fabric
a3 upper layer b3 lower layer
c3 coarse two-component spun-bonded long fiber d3 two-component spun-bonded long fiber
A3 first Hot melt extrusion device A3' second Hot melt extrusion device
B3 spinning device C3 spinneret D3 side blowing cold air E3 drafting device
F3 hot roller G3 deflector roll H3 export I3 opening device
J3 combing device.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
As shown in fig. 1, 4 and 6, the present invention discloses a spunbonded nonwoven fabric 1 (2, 3), wherein an upper layer a1 (a 2, a 3) is a fiber web formed by fusing two-component spunbonded long fibers d1 (d 2, d 3) on the surface of each fiber and bonding the fibers to each other, the two-component spunbonded long fibers d1 (d 2, d 3) are composed of high melting point resin and low melting point resin with the melting points different by more than 20 ℃, and the surface of the two-component spunbonded long fibers d1 (d 2, d 3) contains the low melting point resin; the lower layer b1 (b 2, b 3) of the spunbonded nonwoven fabric 1 had a grammage of 5 to 10g/m2The nonwoven fabric of (1).
Referring to fig. 3A-3C, the two-component spunbond long fibers d1 are two-component sheath-core spunbond long fibers 11, two-component side-by-side spunbond long fibers 12, or two-component orange-peel spunbond long fibers 13; the surface layer 11a of the bicomponent sheath-core spun-bonded long fiber 11 is a low-melting-point resin, and the core layer 11b is a high-melting-point resin (see fig. 3A); half 12a of the bicomponent side-by-side spunbond long fibers 12 is a low melting point resin and the other half 12B is a high melting point resin (see fig. 3B); a plurality of first orange segments 13a of the two-component orange-peel spun-bonded long fiber 13 are made of low-melting-point resin, a plurality of second orange segments 13b are made of high-melting-point resin (see fig. 3C), and the first orange segments 13a and the second orange segments 13b are arranged at intervals.
The non-woven fabric of the lower layer b1 (b 2, b 3) is a spun-bonded non-woven fabric or a hot-air non-woven fabric.
Example 1
As shown in fig. 2 in combination with fig. 1 and fig. 3A to 3C, the spunbond composite nonwoven fabric of the present invention is produced by the following method:
(1) upper layer a1 fiber supply process: adopting a spun-bonding process, respectively heating polyethylene resin and polypropylene resin with the difference of melting points of more than or equal to 20 ℃ by a first hot-melt extrusion device A1 and a second hot-melt extrusion device A1', melting the two resins, then feeding the melted resins into a spinning device B1, changing high-temperature melt into melt trickle in the spinning device B1, and then spraying the melt trickle through a two-component spinneret orifice on a spinneret plate C1 to form a coarse two-component spun-bonded long fiber C1; the side-blown cool air D1 is cooled and formed into two-component spun-bonded long fibers D1 by a drafting device E1, wherein: the bicomponent spun-bonded long fiber d1 is bicomponent sheath-core spun-bonded long fiber 11, bicomponent side-by-side spun-bonded long fiber 12 or bicomponent orange-lobe spun-bonded long fiber 13; the surface layer 11a of the bicomponent sheath-core spun-bonded long fiber 11 is a low-melting-point resin, and the core layer 11b is a high-melting-point resin (see fig. 3A); half 12a of the bicomponent side-by-side spunbond long fibers 12 is a low melting point resin and the other half 12B is a high melting point resin (see fig. 3B); a plurality of first orange segments 13a of the two-component orange-peel spun-bonded long fiber 13 are made of low-melting-point resin, a plurality of second orange segments 13b are made of high-melting-point resin (see fig. 3C), and the first orange segments 13a and the second orange segments 13b are arranged at intervals;
(2) lower layer b1 nonwoven fabric supply step: the non-woven fabric is conveyed to an outlet H1 of the upper layer a1 fiber supply process through a guide roller G1;
(3) a net stacking procedure: the two-component spun-bonded long fibers d1 are overlapped with the non-woven fabric of the lower layer b1 at the outlet H1 of the upper layer fiber supply process to form an upper layer a1 which is a two-component spun-bonded long fiber net, and the lower layer b1 which is an overlapped composite net surface of the non-woven fabric;
(4) a molding procedure: the overlapped composite web surface passes through a hot air oven F1 of a heating device, the low-melting-point resin on the lower surface of the double-component spun-bonded long fiber d1 of the upper layer a1 is melted under the action of hot air, so that the fibers are mutually adhered, the fiber web is consolidated into a web, the fiber web consolidated by the upper layer a1 and the non-woven fabric of the lower layer b1 are consolidated by the melted low-melting-point resin, and then the web and the non-woven fabric are rolled to form the spun-bonded composite non-woven fabric. The spunbonded nonwoven fabric 1 was formed such that the upper layer a1 was a bicomponent spunbond filament d1 passing through the surface of each fiberThe surface of the fiber web is fused and bonded with each other, the two-component spun-bonded long fiber d1 is composed of high-melting point resin and low-melting point resin with the melting points different by more than 20 ℃, and the surface of the two-component spun-bonded long fiber d1 contains the low-melting point resin; the lower layer b1 of the spunbonded nonwoven fabric 1 had a grammage of 8g/m2A spunbonded nonwoven fabric.
After the scheme is adopted, the upper layer a1 fiber web is composed of the two-component spun-bonded long fiber d1, the shrinkage forces of the two thermoplastic resins in the hot air oven F1 of the heating device are different, so that the fibers are easy to curl after being heated, and the low-melting-point resin on the lower surface is melted under the action of hot air, so that the fibers are adhered to each other and are consolidated into a web, bonding points among the fibers are fewer, and the softness of the spun-bonded non-woven fabric is increased and the bulkiness of the spun-bonded non-woven fabric is increased. Meanwhile, the mechanical property of the spun-bonded composite non-woven fabric 1 can be improved by the composite non-woven fabric of the lower layer b1, the composite non-woven fabric can have better tensile strength even under the condition of low gram weight, and the compression resistance of the spun-bonded composite non-woven fabric 1 after being rolled can also be improved, mainly because the lower layer b1 non-woven fabric is formed before being compounded and has a certain supporting effect on the composite upper layer a1 fiber net after being compounded, the three-dimensional thickness of the spun-bonded composite non-woven fabric 1 after being rolled does not change greatly, and the fluffiness retentivity of the spun-bonded composite non-woven fabric 1 is good.
Example 2
As shown in fig. 4 and 5, the spunbond composite nonwoven fabric of the present invention was produced by the following method:
(1) upper layer a2 fiber supply process: adopting a spun-bonding process, respectively heating polyethylene resin and polypropylene resin with the difference of melting points of more than or equal to 20 ℃ by a first hot-melt extrusion device A2 and a second hot-melt extrusion device A2', melting the two resins, then feeding the melted resins into a spinning device B2, changing high-temperature melt into melt trickle in the spinning device B2, and then spraying the melt trickle through a two-component spinneret orifice on a spinneret plate C2 to form a coarse two-component spun-bonded long fiber C2; cooling by side-blown cold air D2, and forming the two-component spun-bonded long fiber D2 by a drafting device E2;
(2) lower layer b2 nonwoven fabric supply step: respectively heating polypropylene resin by a third hot melt extrusion device J2 and a fourth hot melt extrusion device J2 ', respectively melting, then respectively entering a first spinning device K2 and a second spinning device K2 ', changing high-temperature melt into melt trickle in the first spinning device K2 and the second spinning device K2 ', then respectively ejecting the melt trickle by a spinneret plate C2 to form a first slubbing viscous long fiber e2 and a second slubbing viscous long fiber e2 ', cooling by a first side cold air blowing M2 and a second side cold air blowing M2 ', and respectively passing through a first drafting device N2 and a second drafting device N2 ' to form a first slubbing long fiber f2 and a second slubbing long fiber f2 '; the formed first spun-bonded long fiber f2 and the second spun-bonded long fiber f 2' are sequentially laid on the net curtain O2, overlapped to form a net, and then the net is consolidated into a lower layer b2 spun-bonded non-woven fabric through a pair of hot rolls P2; the spunbonded nonwoven fabric of the lower layer b2 is conveyed to an outlet H2 of the fiber supply process of the upper layer a2 through a guide roller G2;
(3) a net stacking procedure: the two-component spun-bonded long fibers d2 are superposed with the on-line produced lower layer b2 spun-bonded non-woven fabric at the outlet H2 of the upper layer a2 fiber supply process to form an upper layer a2 which is a two-component spun-bonded long fiber net, and the lower layer b2 which is an overlapped composite net surface of the spun-bonded non-woven fabric;
(4) a molding procedure: the overlapped composite web surface passes through a hot air oven F2 and a hot roller I2 of a heating device, the low-melting-point resin on the lower surface of the double-component spun-bonded long fiber d2 of the upper layer a2 under the action of hot air is melted, so that the fibers are mutually adhered and consolidated to form a web, and the melted low-melting-point resin and the hot roller I2 consolidate the fiber web consolidated by the upper layer a2 and the spun-bonded non-woven fabric of the lower layer b2 together, and then the spun-bonded composite non-woven fabric 2 is formed by rolling. In the formed spunbonded composite nonwoven fabric 2, the upper layer a2 is a fiber net formed by bonding two-component spunbonded long fibers d2 through fusion of the surfaces of the fibers, the two-component spunbonded long fibers are composed of high-melting-point resin and low-melting-point resin with the melting points different by more than 20 ℃, and the surface of the two-component spunbonded long fibers d2 contains the low-melting-point resin; the lower layer b2 of the spunbonded nonwoven fabric 2 had a grammage of 10g/m2A spunbonded nonwoven fabric.
After adopting above-mentioned scheme, because lower floor b2 spunbonded nonwoven is on-line production, has not passed through the rolling, has reduced rolling and unwinding equipment, has still reduced midway transportation stage to reduce manufacturing cost, reduced the transportation and pollute the risk, also help lower floor b2 spunbonded nonwoven's fluffiness to be better than the non-woven fabrics after the off-line unreels, the fluffiness of the spunbonded composite non-woven fabrics 2 who obtains after compounding with upper a2 two ingredient fiber web is better. In addition, the in-line produced spunbond nonwoven fabric of the lower layer b2 may be a spunbond nonwoven fabric formed of a plurality of spunbond layers, or a spunmelt nonwoven fabric formed of a plurality of spunbond layers or meltblown layers.
Example 3
As shown in fig. 6 and 7, the spunbond composite nonwoven fabric of the present invention was produced by the following method:
(1) upper layer a3 fiber supply process: adopting a spun-bonding process, respectively heating polyethylene resin and polypropylene resin with the difference of melting points of more than or equal to 20 ℃ by a first hot-melt extrusion device A3 and a second hot-melt extrusion device A3', melting the two resins, then feeding the melted resins into a spinning device B3, changing high-temperature melt into melt trickle in the spinning device B3, and then spraying the melt trickle through a two-component spinneret orifice on a spinneret plate C3 to form a coarse two-component spun-bonded long fiber C3; cooling by side-blown cold air D3, and forming the two-component spun-bonded long fiber D3 by a drafting device E3;
(2) lower layer b3 nonwoven fabric supply step: opening 1.5dtex 38mm PE/PP double-component short fibers serving as raw materials by an opening device I3, carding the opened fibers into a fiber web by a carding device J3, and sending the fiber web into a drying oven K3 for hot air penetration and shaping to enable the fibers to be mutually adhered to form a lower layer b3 hot air non-woven fabric; the lower layer b3 hot air non-woven fabric is conveyed to the outlet H3 of the upper layer fiber supply process by a guide roller G3;
(3) a net stacking procedure: the two-component spun-bonded long fibers d3 are superposed with the on-line produced lower layer b3 hot-air non-woven fabric at the outlet H3 of the upper layer a3 fiber supply process to form an upper layer a3 which is a two-component spun-bonded fiber net, and the lower layer b3 which is an overlapped composite net surface of the hot-air non-woven fabric;
(4) a molding procedure: the overlapped composite web surface passes through a hot roll F3 of a heating device, the two-component spun-bonded long fiber d3 of the upper layer a3 is melted by the low-melting-point resin on the lower surface under the action of hot air, so that the fibers are adhered to each other and are consolidated into a web, and the hot roll I3 is used for forming the webThe fiber web consolidated by the upper layer a3 and the hot-air non-woven fabric consolidated by the lower layer b3 are rolled up to form the spunbonded composite non-woven fabric 3. In the formed spunbonded composite nonwoven fabric 3, the upper layer a3 is a fiber net formed by bonding two-component spunbonded long fibers d3 through fusion of the surfaces of the fibers, the two-component spunbonded long fibers d3 are composed of high-melting-point resin and low-melting-point resin with the melting points different by more than 20 ℃, and the surface of the two-component spunbonded long fibers d3 contains the low-melting-point resin; the lower layer b3 of the spunbonded nonwoven fabric 3 had a grammage of 10g/m2The hot air non-woven fabric of (1).
After adopting above-mentioned scheme, because the hot-blast non-woven fabrics of lower floor b3 is on-line production, not through the rolling, rolling and unwinding equipment have been reduced, midway transportation stage has still been reduced, thereby manufacturing cost has been reduced, reduce the transportation pollution risk, and the lower hot-blast non-woven fabrics of grammes per square metre often has the rolling difficulty, the material warp easily after the rolling, thickness loses serious scheduling problem after the rolling, and the emergence of above-mentioned condition has then been avoided to the hot-blast non-woven fabrics of lower floor b3 of on-line production, can further reduce the grammes per square metre of lower floor b3 non-woven fabrics on the substrate of the mechanical properties of guaranteeing spunbonded composite non-woven fabrics, thereby reduce the manufacturing cost of. Meanwhile, the bulkiness of the lower layer b3 hot-air non-woven fabric is better than that of the off-line unreeled non-woven fabric, and the bulkiness of the spun-bonded composite non-woven fabric 3 obtained by compounding the lower layer b3 hot-air non-woven fabric with the upper layer a3 bicomponent fiber web is better. The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims.
Claims (9)
1. A spun-bonded composite nonwoven fabric characterized by: it comprises an upper layer formed by bonding bicomponent spun-bonded long fibers into a fiber web through surface melting of the fibers and a gram weight of 5-10g/m2A lower layer of non-woven fabric; the two-component spun-bonded long fiber on the upper layer consists of high-melting-point resin and low-melting-point resin with the melting points different by more than 20 ℃, and the surface of the two-component spun-bonded long fiber contains the low-melting-point resin.
2. A spunbond composite nonwoven fabric according to claim 1, wherein: the two-component spun-bonded long fiber is a two-component sheath-core spun-bonded long fiber, a two-component orange petal spun-bonded long fiber or a two-component parallel spun-bonded long fiber.
3. A spunbond composite nonwoven fabric according to claim 2, wherein: the surface layer of the double-component sheath-core spun-bonded long fiber is low-melting-point resin, and the core layer is high-melting-point resin.
4. A spunbond composite nonwoven fabric according to claim 1, wherein: the lower-layer non-woven fabric is spun-bonded non-woven fabric or hot-air non-woven fabric.
5. A manufacturing method of spun-bonded composite non-woven fabric is characterized by comprising the following specific steps:
(1) an upper fiber supply step: adopting a spunbond process, respectively heating two thermoplastic resins with the melting point difference of more than or equal to 20 ℃ through a hot melting extrusion device, melting the thermoplastic resins, then feeding the molten thermoplastic resins into a spinning device, changing high-temperature melt into melt trickle in the spinning device, and then ejecting the melt trickle through two-component spinneret orifices on a spinneret plate to form coarse two-component spunbond long fibers; cooling by side-blown cold air, and forming the double-component spun-bonded long fiber by a drafting device;
(2) a lower-layer nonwoven fabric supply step: conveying the non-woven fabric to an outlet of an upper layer fiber supply process through a guide roller;
(3) a net stacking procedure: the two-component spun-bonded long fibers are superposed with the non-woven fabric at the outlet of the upper-layer fiber supply process to form a two-component spun-bonded long fiber net at the upper layer, and the overlapped composite net surface of the non-woven fabric at the lower layer;
(4) a molding procedure: the upper layer fiber net and the lower layer non-woven fabric are consolidated together by the overlapped composite net surface through a heating device and then are rolled to form the spun-bonded composite non-woven fabric.
6. The method of claim 5, wherein the step of forming the spunbond composite nonwoven fabric comprises: the bicomponent spinneret orifices on the spinneret plate in the step (1) are of a sheath-core type, a tangerine petal type or a parallel type.
7. The method of claim 5, wherein the step of forming the spunbond composite nonwoven fabric comprises: and (2) unreeling the coiled non-woven fabric coil by an unreeling device and then conveying the coiled non-woven fabric coil to an outlet of an upper layer fiber supply process by a guide roller.
8. The method of claim 4, wherein the step of forming a spunbond composite nonwoven fabric comprises: and (2) directly conveying the non-woven fabric produced on line to an outlet of an upper layer fiber supply process through a guide roller.
9. The method of claim 4, wherein the step of forming a spunbond composite nonwoven fabric comprises: the heating device is a hot air oven, a hot roller or the combination of the hot air oven and the hot roller.
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