CN115247318A - PP/PE double-component fiber non-woven fabric and preparation method thereof - Google Patents
PP/PE double-component fiber non-woven fabric and preparation method thereof Download PDFInfo
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43825—Composite fibres
- D04H1/43828—Composite fibres sheath-core
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/544—Olefin series
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Multicomponent Fibers (AREA)
Abstract
The invention discloses a PP/PE double-component fiber non-woven fabric and a preparation method thereof, the double-component fiber non-woven fabric comprises a core layer and a skin layer, and the mass ratio of the core layer to the skin layer is 100 (10-100); the core layer is PP polymer, and the cortex is PE polymer modified by photo-thermal material. The core layer is PP polymer and is used as main fiber, and the skin layer is PE polymer modified by photo-thermal material and is used as bonding fiber. The melting point of the PP polymer is about 170 ℃, the melting point of the PE polymer is about 130 ℃, and when the fiber is heated to about 130 ℃, the PE polymer of the skin layer is melted; after cooling, the core layer PP polymer retains its original properties and shape as the sheath PE polymer melts to effectively bond the fibers at the crossing points, providing the necessary strength and modulus support to the entire bicomponent fiber nonwoven.
Description
Technical Field
The invention relates to the technical field of fibers, in particular to a PP/PE double-component fiber non-woven fabric and a preparation method thereof.
Background
The bicomponent hot-melt adhesive fiber is also called composite fiber, and is formed by respectively feeding melts of two different fiber raw materials into spinning equipment with the same core, and fusing the melts in the equipment to form the fiber with the same core of two polymer materials. Bicomponent fibers are a milestone in the development history of fiber production technology, which imparts special properties and a wide range of applications to fibers. Polypropylene (PP) and Polyethylene (PE) are the earliest two-component composite fiber raw materials in the world, and PP/PE two-component hot-melt fibers are an ideal heat-bonding non-woven material and are widely applied.
The essence of thermal bonding is the use of heat to bond the reinforcing web. Because the thermal bonding is a low-carbon environment-friendly non-woven process, the production energy consumption is low, no chemical pollution is caused, and the finished non-woven fabric is fluffy, soft and breathable, the thermal bonding process is rapidly developed in the non-woven fabric industry at present. The hot bonding process mainly comprises hot rolling bonding, hot air bonding and ultrasonic bonding. The hot rolling bonding means that the thermal bonding fiber web is placed in an upper heating roller and a lower heating roller for heating, and certain pressure is applied to bond and reinforce the fiber web, wherein the pressure, the temperature and the raw material fiber are three factors of a hot rolling process. Through-air bonding means that the web is heated by a drying room to be bonded and reinforced. The ultrasonic bonding process is relatively new, and the application in the non-woven fabric industry starts in the last 70 th century, and the ultrasonic bonding process is a process for bonding the molecules of thermal bonding fibers by utilizing the principle of ultrasonic waves to achieve fiber web reinforcement. Mechanical waves with frequencies between 20kHz and 1GHz are called ultrasound. The process generates high-frequency mechanical vibration, namely ultrasonic waves in a transducer by converting voltage into a high-frequency signal, the vibration enables molecules inside thermal bonding fibers to move violently to generate heat energy, and the fibers are heated and melted, so that the fiber web is bonded and reinforced.
Of the three conventional thermal bonding processes, the through-air process is a non-contact, chemical agent-free process and is the only process that can bond a web from inside to outside at high temperature. Since there are no contact bonding, poor dry and wet strength and sanitary problems due to chemical agents, and no hard feeling due to the thick pressure points of the hot-rolled nonwoven fabric, the hot-air nonwoven fabric is a disposable sanitary product most popular with consumers at present in terms of comfort, and is more concentrated in medium and high end products. The conventional nonwoven bonding methods described above typically involve treating the entire nonwoven web without the selectivity and controllability of the bonded regions.
Disclosure of Invention
The invention aims to provide a PP/PE double-component fiber non-woven fabric and a preparation method thereof, wherein the PP/PE double-component fiber non-woven fabric has excellent softness, good fluffy elasticity and higher strength.
Therefore, the invention provides a PP/PE bicomponent fiber non-woven fabric which comprises a core layer and a skin layer, wherein the mass ratio of the core layer to the skin layer is 100 (10-100); the core layer is PP polymer, and the cortex is PE polymer modified by photo-thermal material.
Preferably, the melt index of the PP polymer is 20-45g/10min, and the melt index of the PE polymer is 10-25g/10min.
Preferably, the mass ratio of the PE polymer to the photo-thermal material is 100 (10-50), and the photo-thermal material comprises indocyanine green, methylene blue, porphyrin, benzoylimine, polyaniline, polypyrrole, graphene, carbon nano tube and nitride material Ti 4 N 3 At least one of (1).
The preparation method of the PP/PE bicomponent fiber non-woven fabric comprises the following steps:
(1) Preparing indocyanine green modified PE particles: adding the PE and the photo-thermal material into a double-screw extruder for mixing and granulation to obtain photo-thermal material modified PE particles;
(2) Preparing a PP/PE double-component non-woven material: adding PP particles and photo-thermal material modified PE particles into two component material cylinders of a two-component spinning machine, passing through a core structure spinneret plate, drawing and lapping fibers through airflow, and forming a PP/PE fiber net structure non-woven material on a net forming curtain;
(3) Preparing PP/PE double-component fiber non-woven fabric photo-thermal welding non-woven fabric: and placing the PP/PE fiber mesh-structured non-woven material in a near-infrared laser irradiation area for irradiation to obtain the PP/PE double-component fiber non-woven fabric.
Preferably, in the step (1), the temperature of each zone of the twin-screw extruder is 1 zone: 100 ℃; zone 2: 120 ℃; zone 3: 130 ℃; zone 4: 130 ℃.
Preferably, in the step (2), the temperature of the heating zone of the feeding single-screw extruder is 1 zone: 180 ℃; zone 2: 200 ℃; zone 3: at 210 ℃; zone 4: at 220 ℃. The spinneret die temperature was 220 ℃.
Preferably, in the step (3), the irradiation time is 2 to 4 seconds, and the wavelength of the near-infrared laser is as follows: 808nm, intensity of 0.2-2W/cm 2 。
Compared with the prior art, the invention has the advantages and positive effects that: the invention provides a PP/PE (polypropylene/polyethylene) double-component fiber non-woven fabric and a preparation method thereof, wherein the PP/PE double-component fiber non-woven fabric comprises a core layer and a skin layer, and the mass ratio of the core layer to the skin layer is 100 (10-100); the core layer is PP polymer, and the cortex is PE polymer modified by photo-thermal material. The PP/PE double-component fiber non-woven fabric comprises a core layer and a skin layer, wherein the core layer is a PP polymer and is used as a main fiber, and the skin layer is a PE polymer modified by a photo-thermal material and is used as a bonding fiber. The melting point of the PP polymer is about 170 ℃, the melting point of the PE polymer is about 130 ℃, and when the fiber is heated to about 130 ℃, the PE polymer of the skin layer is melted; after cooling, the core layer PP polymer retains its original properties and shape as the sheath PE polymer melts to effectively bond the fibers at the crossing points, providing the necessary strength and modulus support to the entire bicomponent fiber nonwoven. The PP/PE double-component fiber non-woven fabric is stable in size and small in heat shrinkage rate, the bulkiness and resilience of the PP polymer and the softness and toughness of the PE polymer enable the double-component fiber non-woven fabric to have excellent softness, good fluffy elasticity and high strength, and the average titer of the PP/PE double-component fiber non-woven fabric is 1-20 microns.
Drawings
FIG. 1 is an SEM photograph of a bicomponent fiber nonwoven fabric obtained in example 1 of the present invention;
FIG. 2 is an SEM photograph of a bicomponent fiber nonwoven fabric obtained in example 2 of the present invention;
FIG. 3 is an SEM photograph of a bicomponent fiber nonwoven fabric obtained in example 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The PP/PE bicomponent fiber non-woven fabric comprises a core layer and a skin layer, wherein the mass ratio of the core layer to the skin layer is 100 (10-100); the core layer is PP polymer, and the skin layer is PE polymer modified by photo-thermal material.
The melt index of the PP polymer is 20-45g/10min, and the melt index of the PE polymer is 10-25g/10min.
The photo-thermal material accounts for 15-20wt%, and comprises indocyanine green, methylene blue, porphyrin, benzoylimine, polyaniline, polypyrrole, graphene, carbon nano tube and nitride material Ti 4 N 3 At least one of (1).
The preparation method of the PP/PE bicomponent fiber non-woven fabric comprises the following steps:
(1) Preparing indocyanine green modified PE particles: adding the PE and the photo-thermal material into a double-screw extruder for mixing and granulation to obtain photo-thermal material modified PE particles; the temperature of each zone of the double-screw extruder is 1 zone: 100 ℃; zone 2: 120 ℃; zone 3: 130 ℃; zone 4: 130 ℃;
(2) Preparing a PP/PE double-component non-woven material: adding PP particles and photo-thermal material modified PE particles into two component material cylinders of a two-component spinning machine, passing through a core structure spinneret plate, drawing and lapping fibers through airflow, and forming a PP/PE fiber net structure non-woven material on a net forming curtain;
(3) Preparing PP/PE double-component fiber non-woven fabric photo-thermal welding non-woven fabric: placing the PP/PE fiber reticular structure non-woven material in a near-infrared laser irradiation area for irradiation for 2-4 seconds, wherein the wavelength of the near-infrared laser is as follows: 808nm, intensity of 0.2-2W/cm 2 . The photo-thermal material in the fiber can generate strong photo-thermal effect, the fiber skin layer is softened to be molten, and the fiber cross points are bonded to obtain the reinforced PP/PE double-component fiber non-woven fabric.
The PP/PE double-component fiber non-woven fabric comprises a core layer and a skin layer, wherein the core layer is a PP polymer and is used as a main fiber, and the skin layer is a PE polymer modified by a photo-thermal material and is used as a bonding fiber. The melting point of the PP polymer is about 170 ℃, the melting point of the PE polymer is about 130 ℃, and when the fiber is heated to about 130 ℃, the PE polymer of the skin layer is melted; after cooling, the core layer PP polymer retains its original properties and shape as the sheath PE polymer melts to effectively bond the fibers at the crossing points, providing the necessary strength and modulus support to the entire bicomponent fiber nonwoven. The PP/PE double-component fiber non-woven fabric is stable in size and small in heat shrinkage rate, the bulkiness and resilience of the PP polymer and the softness and toughness of the PE polymer enable the double-component fiber non-woven fabric to have excellent softness, good fluffy elasticity and high strength, and the average titer of the PP/PE double-component fiber non-woven fabric is 1-20 microns.
The PP/PE double-component fiber non-woven fabric preparation method provided by the application is different from the existing PP/PE double-component fiber non-woven fabric preparation method in that materials with strong photothermal effect are uniformly doped in the skin layer fibers, the whole non-woven fabric material is processed, the low-melting-point components are partially melted through near infrared laser irradiation, and cross-linking-hot welding is carried out at the fiber cross points.
The existing PP/PE bicomponent fiber non-woven fabric heat bonding non-woven fabric material is characterized in that a fiber web is reinforced by PP and PE materials through hot air, hot rolling or ultrasonic bonding after melt-blown and spun-bonded bicomponent spinning lapping, and the whole non-woven fabric is in a treatment range, so that controllable specific area selective treatment and patterning design cannot be carried out. The designed PP/PE bicomponent fiber non-woven fabric photo-thermal welding non-woven fabric material is subjected to fusion bonding of the intersection points of the fibers of the skin layer by selecting a near-infrared laser irradiation area. The present invention belongs to a non-contact fiber bonding (welding) process without chemical reagents, and simultaneously, because of a double-component forming process, the crimping rate and the crimping number of the fiber are far higher than those of single-component fiber, and the original fluffy and soft characteristics of non-woven fabric materials are ensured.
Compared with the existing methods of thermal bonding and adhesive bonding, the method for bonding by the photothermal conversion method does not change the main structure of the fiber web, particularly the fluffy structure of the bi-component fiber web, and can bond the fiber web into the non-woven fabric without adding new components such as adhesive and the like. The invention has simple process, and only needs to add light source in the low melting point component and the heat conversion material to form a net area.
The invention utilizes the difference of melting points of two components of the bicomponent fiber, adds the photo-thermal conversion material in the low melting point component, and the fiber net after melt spinning leads the low melting point component to be (partially) melted by the photo-thermal conversion method, thereby leading the fiber to be bonded into the non-woven fabric.
Example 1
The preparation method of the PP/PE bicomponent fiber non-woven fabric comprises the following steps:
(1) Preparation of indocyanine green (ICG) modified PE particles: adding the PE particles and IGC into a double-screw extruder according to the mass ratio of 100: 100 ℃; zone 2: 120 ℃; zone 3: 130 ℃; zone 4: ICG modified PE particles were obtained at 130 ℃.
(2) Preparing a PP/PE double-component non-woven material: PP particles and ICG modified PE particles were mixed according to PP: adding two component material cylinders of a two-component spinning machine according to the mass ratio of PE =80, extruding and respectively melting by a screw, feeding into a concentric sheath-core spinneret assembly for extrusion after passing through a metering pump, cooling fibers, drafting and lapping by air flow, and forming a PP/PE fiber mesh-structured non-woven material on a lapping curtain.
(3) Preparing PP/PE double-component fiber non-woven fabric: mixing PP/PE fibersThe web-like structure nonwoven material was placed in the near-infrared laser irradiation zone for 2 seconds, with a laser wavelength: 808nm, intensity 1.5W/cm 2 And the photothermal material in the skin layer fiber generates a strong photothermal effect, the heat generated at the cross point of the fiber in unit area is more, the melting point is reached firstly, and bonding is generated, so that the reinforced PP/PE double-component fiber non-woven fabric is obtained.
FIG. 1 is an SEM image of the nonwoven fabric of this example, in which it can be seen that the junction between the fibers is crosslinked due to the melting of the heated portion of the sheath.
Example 2
The preparation method of the PP/PE bicomponent fiber nonwoven fabric of the embodiment includes:
1. preparation of indocyanine green (ICG) modified PE particles: adding the PE particles and indocyanine green (ICG) into a double-screw extruder according to the mass ratio of 100: 100 ℃; zone 2: 120 ℃; zone 3: 130 ℃; zone 4: ICG modified PE particles were obtained at 130 ℃.
2. Preparing a PP/PE double-component non-woven material: adding PP particles and ICG modified PE particles into two component material cylinders of a two-component spinning machine according to the mass ratio of PP: PE =70, extruding and respectively melting by a screw, feeding into a concentric sheath-core type spinning assembly for extrusion after passing through a metering pump, cooling fibers, drafting and lapping by airflow, and forming a PP/PE fiber mesh-structured non-woven material on a lapping curtain.
3. Preparing PP/PE double-component fiber non-woven fabric: placing the PP/PE fiber mesh-structured non-woven material in a near-infrared laser irradiation area for 1 second, wherein the laser wavelength is as follows: 808nm, the strength is 1W/cm & lt 2 & gt, the photothermal material in the skin layer fiber generates a strong photothermal effect, the heat generated at the intersection point of the fibers in unit area is more, the fusion point is reached firstly, and the bonding is generated, so that the reinforced PP/PE double-component fiber non-woven fabric is obtained.
FIG. 2 is an SEM image of the nonwoven fabric of this example, in which it can be seen that the junction between the fibers is crosslinked due to the melting of the heated portion of the sheath. Compared with example 1, the degree of melting of the fiber connection part is increased due to the increase of the using amount of the photothermal material.
Example 3
The preparation method of the PP/PE bicomponent fiber nonwoven fabric of the embodiment includes:
1. preparation of indocyanine green (ICG) modified PE particles: adding the PE particles and indocyanine green (ICG) into a double-screw extruder according to the mass ratio of 100: 100 ℃; zone 2: 120 ℃; zone 3: 130 ℃; zone 4: ICG modified PE particles were obtained at 130 ℃.
2. Preparing a PP/PE double-component non-woven material: adding PP particles and ICG modified PE particles into two component material cylinders of a two-component spinning machine according to the mass ratio of PP: PE =70, extruding and respectively melting by a screw, feeding into a concentric sheath-core type spinning assembly for extrusion after passing through a metering pump, cooling fibers, drafting and lapping by airflow, and forming a PP/PE fiber mesh-structured non-woven material on a lapping curtain.
3. Preparing PP/PE double-component fiber non-woven fabric photo-thermal welding non-woven fabric: placing the PP/PE fiber mesh-structured non-woven material in a near-infrared laser irradiation area for 3 seconds, wherein the laser wavelength is as follows: 808nm, the strength is 2W/cm < 2 >, the photothermal material in the skin layer fiber generates strong photothermal effect, the heat generated at the intersection point of the fibers in unit area is more, the fusion point is reached firstly, and the bonding is generated, so that the reinforced PP/PE double-component fiber non-woven fabric is obtained.
FIG. 3 is an SEM image of the nonwoven fabric of this example, in which it can be seen that the junction between the fibers is crosslinked due to the melting of the heated portion of the sheath. Compared with examples 1 and 2, the degree of melting at the fiber junction is increased due to the increase of light intensity, irradiation time and the amount of the photothermal material. As can be seen from table 2, and as the degree of melt crosslinking increases, the air permeability decreases.
The fiber nonwoven fabrics of examples 1, 2 and 3 and a control sample (commercial hot air nonwoven fabric) were subjected to respective tests using a thickness tester, a fabric strength tester and a fabric permeability tester, and the test results are shown in tables 1 and 2. As is clear from table 1, the fiber nonwoven fabric of the present invention has high strength, excellent flexibility, and good air permeability and bulkiness.
TABLE 1
TABLE 2
| Example 1 | Example 2 | Example 3 | Commodity hot-air non-woven fabric | |
| Area of sample (cm) | 5 | 5 | 5 | 5 |
| Air permeability (mm/s) | 1769 | 1578 | 1352 | 1656 |
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. A PP/PE double-component fiber non-woven fabric is characterized by comprising
The core-skin composite material comprises a core layer and a skin layer, wherein the mass ratio of the core layer to the skin layer is 100 (10-100);
the core layer is PP polymer, and the cortex is PE polymer modified by photo-thermal material.
2. The PP/PE bicomponent fiber nonwoven fabric according to claim 1,
the melt index of the PP polymer is 20-45g/10min, and the melt index of the PE polymer is 10-25g/10min.
3. The PP/PE bicomponent fiber nonwoven fabric according to claim 1,
the photo-thermal material comprises, by mass, 15-20wt% of indocyanine green, methylene blue, porphyrin, benzoylimine, polyaniline, polypyrrole, graphene, a carbon nano tube and a nitride material Ti 4 N 3 At least one of (1).
4. The method for preparing the PP/PE bicomponent fiber nonwoven fabric according to any one of claims 1-3, comprising:
(1) Preparing indocyanine green modified PE particles: adding the PE and the photo-thermal material into a double-screw extruder for mixing and granulation to obtain photo-thermal material modified PE particles;
(2) Preparing a PP/PE double-component non-woven material: adding PP particles and photo-thermal material modified PE particles into two component material cylinders of a two-component spinning machine, passing through a core structure spinneret plate, drawing and lapping fibers through airflow, and forming a PP/PE fiber net structure non-woven material on a net forming curtain;
(3) Preparing PP/PE double-component fiber non-woven fabric photo-thermal welding non-woven fabric: and placing the PP/PE fiber mesh-structured non-woven material in a near-infrared laser irradiation area for irradiation to obtain the PP/PE double-component fiber non-woven fabric.
5. The method of preparing the PP/PE bicomponent fiber nonwoven fabric according to claim 1,
in the step (1), the temperature of each zone of the double-screw extruder is 1 zone: 100 ℃; zone 2: 120 ℃; zone 3: 130 ℃; zone 4: 130 ℃.
6. The method of preparing the PP/PE bicomponent fiber nonwoven fabric according to claim 1,
in the step (2), the step (c),
the temperature of the heating zone of the feeding single-screw extruder is 1 zone: 180 ℃; zone 2: 200 ℃; zone 3: at 210 ℃; zone 4: 220 ℃;
the spinneret die temperature was 220 ℃.
7. The method of preparing the PP/PE bicomponent fiber nonwoven fabric according to claim 1,
in the step (3), the irradiation time is 2-4 seconds, and the near-infrared laser wavelength is as follows: 808nm, intensity of 0.2-2W/cm 2 。
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