CN114960039A - Polypropylene non-woven fabric and preparation method and application thereof - Google Patents
Polypropylene non-woven fabric and preparation method and application thereof Download PDFInfo
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- CN114960039A CN114960039A CN202210091486.9A CN202210091486A CN114960039A CN 114960039 A CN114960039 A CN 114960039A CN 202210091486 A CN202210091486 A CN 202210091486A CN 114960039 A CN114960039 A CN 114960039A
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- -1 Polypropylene Polymers 0.000 title claims abstract description 95
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 91
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 90
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000000654 additive Substances 0.000 claims abstract description 29
- 230000000996 additive effect Effects 0.000 claims abstract description 29
- 239000004094 surface-active agent Substances 0.000 claims abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 25
- 230000008018 melting Effects 0.000 claims abstract description 25
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000010410 layer Substances 0.000 claims description 82
- 238000005098 hot rolling Methods 0.000 claims description 34
- 239000002131 composite material Substances 0.000 claims description 31
- 229920005653 propylene-ethylene copolymer Polymers 0.000 claims description 25
- 208000012886 Vertigo Diseases 0.000 claims description 18
- 239000012792 core layer Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 238000009987 spinning Methods 0.000 claims description 13
- 150000002193 fatty amides Chemical class 0.000 claims description 10
- 229920000098 polyolefin Polymers 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000010410 dusting Methods 0.000 claims 1
- 229920001038 ethylene copolymer Polymers 0.000 abstract description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 3
- 239000000123 paper Substances 0.000 description 50
- 239000000835 fiber Substances 0.000 description 13
- 238000004049 embossing Methods 0.000 description 7
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical compound BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 235000014113 dietary fatty acids Nutrition 0.000 description 6
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 229930195729 fatty acid Natural products 0.000 description 6
- 239000000194 fatty acid Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 239000002250 absorbent Substances 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 5
- 239000004752 air-laid paper Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F2013/51002—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers with special fibres
- A61F2013/51023—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers with special fibres being polymeric fibres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Textile Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- Epidemiology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a polypropylene non-woven fabric and a preparation method and application thereof, belonging to the technical field of non-woven fabrics, wherein the polypropylene non-woven fabric comprises the following raw materials in percentage by mass: modified polypropylene material B10-30%, soft additive 0.1-0.6%, white master batch 0.25-0.7%, hydrophilic surfactant 0.5-1.5%, and the balance of modified propylene and ethylene copolymer A; the polypropylene non-woven fabric has the characteristic of lower melting point, and the melting point range is 130-150 ℃; the polypropylene non-woven fabric simultaneously increases the hydrophilicity and softness of a non-woven fabric product, and the prepared product simultaneously considers the softness and the hydrophilicity; the hydrophilicity can reach MD (machine direction) at 15gsm on the basis of being similar to that of a common product: 1.5-2.0, CD: 0.7-1.2; solves the problems that the material melting compounding difficulty is high and the softness and the hydrophilicity can not be simultaneously considered in the existing preparation method of the polypropylene spun-bonded non-woven fabric.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a polypropylene non-woven fabric and a preparation method and application thereof.
Background
The non-woven fabric is non-woven fabric, which is formed by directly using high polymer slices, short fibers or filaments to form a web by air flow or machinery, then carrying out spunlace, needling or hot rolling reinforcement, and finally carrying out after-treatment. The preparation method of the existing spun-bonded polypropylene non-woven fabric mainly comprises the following steps: polymer (polypropylene and functional additive), high-temperature melt extrusion of a large screw rod, a filter, a metering pump (quantitative conveying), spinning, cooling, air flow traction, net curtain forming, upper and lower pressing rollers (pre-reinforcement), rolling (reinforcement) of a rolling mill, winding, slitting, packaging and finished product warehousing.
The existing preparation method of the polypropylene spun-bonded non-woven fabric mainly has the following defects:
(1) the melting point of the polypropylene spunbonded fabric is between 160 and 170 ℃, the melting point of the polypropylene spunbonded fabric is greatly different from that of a PE material, and the melting compounding difficulty of the two materials is high.
(2) The non-woven fabric obtained by the existing method cannot simultaneously obtain the compatibility of softness and hydrophilicity.
Disclosure of Invention
The invention provides a polypropylene non-woven fabric, a preparation method and application thereof, aiming at solving the technical problems of the existing polypropylene non-woven fabric, and the following purposes of the polypropylene non-woven fabric are realized:
(1) the polypropylene spunbonded fabric with lower melting point is obtained, and the melting point is between 130 and 150 ℃.
(2) The obtained low-melting-point polypropylene spunbonded fabric has good flexibility and hydrophilicity.
In order to solve the technical problems, the following technical scheme is adopted:
the polypropylene non-woven fabric comprises the following raw materials in percentage by mass:
modified polypropylene material B10-30%, soft additive 0.1-0.6%, white master batch 0.25-0.7%, hydrophilic surfactant 0.5-1.5%, and modified propylene-ethylene copolymer A in balance.
As a further scheme of the invention: the modified propylene-ethylene copolymer A has MFR within the range of 30-40g/10min and a melting point within the range of 50-170 ℃; the modified polypropylene material B has MFR within the range of 40-60g/10min and a melting point within the range of 50-100 ℃.
As a further scheme of the invention: the softening additive has an MFR of 500-1800g/10 min.
As a further scheme of the invention: the softening additive consists of a fatty amide derivative and a polyolefin derivative, wherein the mass ratio of the fatty amide derivative to the polyolefin derivative is 1: 1.
As a further scheme of the invention: the percentage of the modified propylene-ethylene copolymer A to the modified polypropylene material B in the total mass is 97.95%.
The invention also provides a preparation method of the polypropylene non-woven fabric, which comprises the following steps:
mixing materials: weighing a modified polypropylene material B, a soft additive, a white master batch, a hydrophilic surfactant and a modified propylene-ethylene copolymer A according to a ratio, and adding the modified propylene-ethylene copolymer A, the modified polypropylene material B, the soft additive and the white master batch into a mixing device for mixing;
melt extrusion: the melt extrusion is carried out, wherein the screw temperature of the screw 1.1 is 180-200 ℃; the screw temperature of the screw 1.2 is 200-240 ℃; the temperature of the screw and the connecting area is 230-250 ℃; after melt filtration, melt metering, die head spinning and drafting treatment are carried out according to requirements to obtain spinning;
hot rolling treatment: after the obtained spinning is subjected to a filament dividing and lapping process, the spinning passes through a space between a pattern roller and a smooth roller of a hot rolling mill to be subjected to hot rolling treatment, and online humidification treatment is carried out after the hot rolling treatment;
treating the upper liquid: adding a hydrophilic surfactant, and treating with the hydrophilic surfactant, wherein the oil preparation concentration is 5-15%, the oil groove temperature is 20-40 ℃, the press roll position is 18cm, and the oil roll rotation speed is 15 rpm;
slitting treatment: and cutting after drying, winding and rolling to obtain the non-woven fabric product.
As a further scheme of the invention: melt extrusion: the melt extrusion is carried out, wherein the temperature of a screw 1.1 is 190 ℃; the temperature of the screw 1.2 is 210 ℃; the temperature of the screw and the connecting zone is from 235 ℃ to 245 ℃.
As a further scheme of the invention: the speed of a mesh belt in the hot rolling treatment is 300-1000 m/min, the speed ratio of a hot rolling mill is 0-3.0%, the speed ratio of a cold water roller is 2.0-4.0%, the hot rolling pressure is 60-100 daN/cm, the temperature of an embossing roller is 130-150 ℃, and the temperature of a smooth roller is 120-140 ℃; the compression roller speed ratio of the humidifier is 2.0-4.0%, and the wrap angle of the non-woven fabric and the liquid carrying roller is 20-60 degrees.
The invention also provides the application of the polypropylene non-woven fabric in the paper diaper, the paper diaper comprises a core layer and a composite dust-free paper layer, wherein the composite dust-free paper layer is compounded and bonded with a dust-free paper material layer and a polypropylene non-woven fabric layer, and the composite dust-free paper layer is arranged on the upper layer and the lower layer of the core layer and/or wraps the outer layer of the core layer.
As a further scheme of the invention: the gram weight of the dust-free paper material layer is 20-50 gsm; the gram weight of the polypropylene non-woven fabric layer is 10-18 gsm.
Compared with the prior art, the invention has the beneficial effects that:
the polypropylene non-woven fabric has the characteristic of lower melting point, and the melting point range is 130-150 ℃.
The polypropylene non-woven fabric simultaneously increases the hydrophilicity and softness of a non-woven fabric product, and the prepared product simultaneously considers the softness and the hydrophilicity; the hydrophilicity can be similar to that of a common product, and the softness of 15gsm can also reach MD: 1.5-2.0, CD: 0.7-1.2.
When the gram weight of the polypropylene non-woven fabric is 14gsm, the MD softness is 1.3-1.8, and the CD softness is 0.6-1.1; MD strength is 18.0-25.0N/5cm, CD strength is 7.0-12.0N/5cm, MD elongation is 30.0-70.0%, and CD elongation is 50.0-90.0%.
When the gram weight is 15gsm, the MD softness is 1.5-2.0, and the CD softness is 0.7-1.2; MD strength of 20.0-26.0N/5cm, CD strength of 8.0-13.0N/5cm, MD elongation of 30.0-70.0%, and CD elongation of 50.0-90.0%.
When the gram weight is 18gsm, the MD softness is 2.0-3.0, and the CD softness is 1.0-2.0; MD strength is 25.0-32.0N/5cm, CD strength is 12.0-18.0N/5cm, MD elongation is 30.0-70.0%, and CD elongation is 50.0-90.0%.
The preparation method of the polypropylene non-woven fabric is simple in process and convenient to operate.
Drawings
FIG. 1 is a graph showing the temperature settings of screws in examples 1 to 3 of the present invention;
FIG. 2 is a schematic structural view of a composite airlaid paper layer of example 4 of the present invention;
fig. 3 is a schematic view showing the internal structure of a diaper according to example 4 of the present invention;
fig. 4 is a schematic view showing the internal structure of a diaper according to example 5 of the present invention;
fig. 5 is a schematic view showing the internal structure of a diaper according to example 6 of the present invention;
fig. 6 is a schematic view showing the internal structure of a diaper according to example 7 of the present invention.
In the figure: 2-composite dust-free paper layer; 21-a layer of dust-free paper material; 22-polypropylene non-woven fabric layer; 3-core layer.
Detailed Description
Example 1:
as shown in fig. 1, a method for preparing a polypropylene nonwoven fabric comprises the following steps:
(1) mixing materials:
the raw materials comprise a propylene-ethylene copolymer A and a modified polypropylene B,
the propylene-ethylene copolymer A has MFR in the range of 30-40g/10min and a melting point in the range of 50-170 ℃,
the modified polypropylene B has MFR within the range of 40-60g/10min and a melting point within the range of 50-100 ℃;
the ratio of the propylene to the ethylene copolymer A to the modified polypropylene B is 87.95: 10;
the raw materials also comprise: softening additive, white master batch and hydrophilic surfactant;
the softening additive has MFR in the range of 500-1800g/10 min;
the softening additive consists of a fatty amide derivative and a polyolefin derivative, wherein the mass ratio of the fatty amide derivative to the polyolefin derivative is 1: 1.
The white master batch is titanium dioxide;
weighing a propylene-ethylene copolymer A, a modified polypropylene B, a softening additive, a white master batch and a hydrophilic surfactant, wherein the percentage of each raw material is as follows: the composite material comprises a propylene-ethylene copolymer A87.95%, a modified polypropylene B10%, a softening additive 0.35%, a white master batch 0.7% and a hydrophilic surfactant 1.0%.
The hydrophilic surfactant comprises the composition of mixed fatty acid ester, dioctyl sodium sulfosuccinate and water, wherein the mass ratio of each component is 93.5% of mixed fatty acid ester, 2.5% of dioctyl sodium sulfosuccinate and 4% of water.
Adding the propylene-ethylene copolymer A, the modified polypropylene B, the soft additive and the white master batch into a mixing device, and automatically feeding the raw materials to complete mixing.
(2) Melt extrusion:
feeding the mixed raw materials into a screw extruder respectively for melt extrusion treatment,
the temperatures of the screw 1.1 areas of the screw extruder are 190 ℃;
the temperature of screws 1.2 of the screw extruder is 210 ℃ respectively;
the temperatures of other screw rod areas and the melt pipeline connecting area are 240 ℃ respectively;
the screw extruder is characterized in that the model is RT 3201-1-180-300F;
and after melt filtration, performing melt metering, die head spinning and drafting treatment according to requirements to obtain the spinning.
(3) Hot rolling treatment:
respectively carrying out a dividing and lapping process on the spinning obtained in the step (2);
passing through a pattern roller and a smooth roller of a hot rolling mill to carry out hot rolling treatment, and then entering a humidifier to carry out humidification treatment;
in the hot rolling treatment, the temperature difference between the embossing roll and the smooth roll is 10 ℃;
the temperature of the embossing roller is 135 ℃, the temperature of the smooth roller is 125 ℃,
the mesh belt speed is 614m/min, the hot rolling pressure is 80daN/cm,
the speed ratio of the hot rolling mill is 1.5 percent, and the speed ratio of the cold water roller is 3.0 percent.
The compression roller speed ratio of the humidifying machine is 2.6%.
(4) Treating the upper liquid:
adding hydrophilic surfactant, treating with hydrophilic surfactant,
the concentration of the oil preparation is 10 percent,
the temperature of the oil groove is 30 ℃,
the position of the compression roller is 18 cm;
the oil roller speed was 15rpm and the OPU was 1.0%.
(5) Slitting treatment:
and cutting after drying, winding and rolling to obtain the non-woven fabric product.
Example 2:
as shown in fig. 1, a method for preparing a polypropylene nonwoven fabric comprises the following steps:
(1) mixing materials:
the raw materials comprise a propylene-ethylene copolymer A and a modified polypropylene B,
the propylene-ethylene copolymer A has MFR in the range of 30-40g/10min and a melting point in the range of 50-170 ℃,
the modified polypropylene B has MFR within the range of 40-60g/10min and a melting point within the range of 50-100 ℃;
the ratio of the propylene to the ethylene copolymer A to the modified polypropylene B is 82.95: 15;
the raw materials also comprise: softening additive, white master batch and hydrophilic surfactant;
the softening additive has MFR in the range of 500-1800g/10 min;
the softening additive consists of a fatty amide derivative and a polyolefin derivative, wherein the mass ratio of the fatty amide derivative to the polyolefin derivative is 1: 1.
The white master batch is titanium dioxide;
weighing a propylene-ethylene copolymer A, a modified polypropylene B, a softening additive, a white master batch and a hydrophilic surfactant, wherein the percentage of each raw material is as follows: the composite material comprises a propylene-ethylene copolymer A82.95%, modified polypropylene B15%, a softening additive 0.35%, white master batch 0.7% and a hydrophilic surfactant 1.0%.
The hydrophilic surfactant comprises the composition of mixed fatty acid ester, dioctyl sodium sulfosuccinate and water, wherein the mass ratio of each component is 93.5% of mixed fatty acid ester, 2.5% of dioctyl sodium sulfosuccinate and 4% of water.
Adding the propylene-ethylene copolymer A, the modified polypropylene B, the soft additive and the white master batch into a mixing device, and automatically feeding the raw materials to complete mixing.
(2) Melt extrusion:
feeding the mixed raw materials into a screw extruder respectively for melt extrusion treatment,
the temperatures of the screw 1.1 areas of the screw extruder are respectively 190 ℃;
the temperature of screws 1.2 of the screw extruder is 210 ℃ respectively;
the temperatures of other screw areas and the melt pipeline connecting area are respectively 238 ℃;
the screw extruder is characterized in that the model is RT 3201-1-180-300F;
and after melt filtration, carrying out melt metering, die head spinning and drafting treatment according to requirements to obtain spinning.
(3) Hot rolling treatment:
respectively carrying out a dividing and lapping process on the spinning obtained in the step (2);
passing through a pattern roller and a smooth roller of a hot rolling mill to carry out hot rolling treatment, and then entering a humidifier to carry out humidification treatment;
in the hot rolling treatment, the temperature difference between the embossing roll and the smooth roll is 8 ℃;
the temperature of the embossing roller is 133 ℃, the temperature of the smooth roller is 125 ℃,
the mesh belt speed is 614m/min, the hot rolling pressure is 78daN/cm,
the speed ratio of the hot rolling mill is 1.7 percent, and the speed ratio of the cold water roller is 3.2 percent.
The compression roller speed ratio of the humidifying machine is 2.8%.
(4) Treating the upper liquid:
adding hydrophilic surfactant, treating with hydrophilic surfactant,
the concentration of the oil preparation is 10 percent,
the temperature of the oil groove is 30 ℃,
the position of the compression roller is 18 cm;
the oil roller speed was 15rpm and the OPU was 1.0%.
(5) Slitting treatment:
and cutting after drying, winding and rolling to obtain the non-woven fabric product.
Example 3:
as shown in fig. 1, a method for preparing a polypropylene nonwoven fabric comprises the following steps:
(1) mixing materials:
the raw materials comprise a propylene-ethylene copolymer A and a modified polypropylene B,
the propylene-ethylene copolymer A has MFR in the range of 30-40g/10min and a melting point in the range of 50-170 ℃,
the modified polypropylene B has MFR within the range of 40-60g/10min and a melting point within the range of 50-100 ℃;
the ratio of the propylene to the ethylene copolymer A to the modified polypropylene B is 77.95: 20;
the raw materials also comprise: a softening additive, a white master batch and a hydrophilic surfactant;
the softening additive has MFR in the range of 500-1800g/10 min;
the softening additive consists of a fatty amide derivative and a polyolefin derivative, wherein the mass ratio of the fatty amide derivative to the polyolefin derivative is 1: 1.
The white master batch is titanium dioxide;
weighing a propylene-ethylene copolymer A, a modified polypropylene B, a softening additive, a white master batch and a hydrophilic surfactant, wherein the percentage of each raw material is as follows: 77.95 percent of propylene-ethylene copolymer A, 20 percent of modified polypropylene B, 0.35 percent of soft additive, 0.7 percent of white master batch and 1.0 percent of hydrophilic surfactant.
The hydrophilic surfactant comprises the composition of mixed fatty acid ester, dioctyl sodium sulfosuccinate and water, wherein the mass ratio of each component is 93.5% of mixed fatty acid ester, 2.5% of dioctyl sodium sulfosuccinate and 4% of water.
Adding the propylene-ethylene copolymer A, the modified polypropylene B, the soft additive and the white master batch into a mixing device, and automatically feeding the raw materials to complete mixing.
(2) Melt extrusion:
feeding the mixed raw materials into a screw extruder respectively for melt extrusion treatment,
the temperatures of the screw 1.1 areas of the screw extruder are respectively 190 ℃;
the temperature of screws 1.2 of the screw extruder is 210 ℃ respectively;
the temperatures of other screw rod areas and a melt pipeline connecting area are 235 ℃;
the screw extruder is characterized in that the model is RT 3201-1-180-300F;
and after melt filtration, carrying out melt metering, die head spinning and drafting treatment according to requirements to obtain spinning.
(3) Hot rolling treatment:
respectively carrying out a dividing and lapping process on the spinning obtained in the step (2);
passing through a pattern roller and a smooth roller of a hot rolling mill to carry out hot rolling treatment, and then entering a humidifier to carry out humidification treatment;
in the hot rolling treatment, the temperature difference between the embossing roll and the smooth roll is 10 ℃;
the temperature of the embossing roller is 133 ℃, the temperature of the smooth roller is 123 ℃,
the mesh belt speed is 614m/min, the hot rolling pressure is 75daN/cm,
the speed ratio of the hot rolling mill is 2.0 percent, and the speed ratio of the cold water roller is 3.5 percent.
The compression roller speed ratio of the humidifying machine is 3.0 percent.
(4) Treating the upper liquid:
adding hydrophilic surfactant, treating with hydrophilic surfactant,
the concentration of the oil preparation is 10 percent,
the temperature of the oil groove is 30 ℃,
the position of the compression roller is 18 cm;
the oil roller speed was 15rpm and the OPU was 1.0%.
After the hydrophilic oil agent is added, the matching property between the materials is increased, and the material with both softness and hydrophilicity is prepared.
(5) Slitting treatment:
and cutting after drying, winding and rolling to obtain the non-woven fabric product.
The polypropylene nonwoven fabric obtained in example 1 of the present invention was tested, taking 14gsm/15gsm/18gsm SSS product as an example, and the test results are shown in Table 1: (gram weight range. + -. 0.2g)
Softness test standard INDA IST 90.3, test instrument Handle-O-Meter, test slit distance 0.25inch, test sample size 100 mm; the strength and elongation test sample has a width of 50mm, a test fixture of 100mm and a tensile speed of 300 mm/min.
TABLE 1
When the gram weight of the polypropylene non-woven fabric prepared in the embodiments 1 to 3 is 14gsm, the MD softness is 1.3 to 1.8, and the CD softness is 0.6 to 1.1; MD strength is 18.0-25.0N/5cm, CD strength is 7.0-12.0N/5cm, MD elongation is 30.0-70.0%, and CD elongation is 50.0-90.0%.
When the gram weight is 15gsm, the MD softness is 1.5-2.0, and the CD softness is 0.7-1.2; MD strength of 20.0-26.0N/5cm, CD strength of 8.0-13.0N/5cm, MD elongation of 30.0-70.0%, and CD elongation of 50.0-90.0%.
When the gram weight is 18gsm, the MD softness is 2.0-3.0, and the CD softness is 1.0-2.0; MD strength is 25.0-32.0N/5cm, CD strength is 12.0-18.0N/5cm, MD elongation is 30.0-70.0%, and CD elongation is 50.0-90.0%.
In conclusion: the polypropylene non-woven fabric has the characteristic of lower melting point, and the melting point range is 130-150 ℃; the polypropylene non-woven fabric simultaneously increases the hydrophilicity and softness of a non-woven fabric product, and the prepared product simultaneously considers the softness and the hydrophilicity; the hydrophilicity can reach MD (machine direction) at 15gsm on the basis of being similar to that of a common product: 1.5-2.0, CD: 0.7-1.2; the preparation method of the polypropylene non-woven fabric is simple in process and convenient to operate.
Example 4:
as shown in fig. 2 and 3, the polypropylene nonwoven fabric is applied to a diaper, the diaper comprises a core layer 3, and further comprises a composite dust-free paper layer 2, the composite dust-free paper layer 2 is composed of a dust-free paper material layer 21 and a polypropylene nonwoven fabric layer 22 which are bonded together, and the composite dust-free paper layer 2 is wrapped on the outer layer of the core layer 3.
The gram weight of the dust-free paper material layer 21 is 20-50gsm, and the fiber components comprise 30-50% of sheath-core bicomponent staple fibers and 50-70% of wood pulp fibers; the sheath-core bicomponent staple fiber is a mixture of PE and PET or a mixture of PE and PP; the gram weight of the polypropylene non-woven fabric layer 22 is 10-18 gsm.
The dust-free paper material layer 21 and the polypropylene non-woven fabric layer 22 are passed through an oven to melt the sheath PE part of the sheath-core bicomponent fiber in the dust-free paper material layer 21, and then self-bonded with the polypropylene non-woven fabric. No glue or hot rolling or ultrasonic wave compounding is used. The specific principle is as follows: the temperature of the oven is set to 130-150 ℃, the melting point of PE is 120-135 ℃, the melting point of the polypropylene non-woven fabric is 130-150 ℃, and when the dust-free paper material layer 21 passes through the oven, the outer PE component of the sheath-core bicomponent fiber in the dust-free paper material layer is self-bonded with the polypropylene non-woven fabric after being melted, so that the composite strength is increased. The non-woven fabrics of two-layer different compositions of dust-free paper material layer 21 and polypropylene non-woven fabrics are closer because of the fibre melting point, and the secondary melts the adhesion when passing through the oven and is in the same place, plays the reinforcement effect.
The dust-free paper material layer 21 and the polypropylene non-woven fabric layer 22 can also be compounded by hot melt adhesive.
In this embodiment, as shown in fig. 3, the composite dust-free paper layer 2 is wrapped on the outer layer of the core layer 3, the dust-free paper material layer 21 is located on the inner side, and the polypropylene nonwoven fabric layer 22 is located on the outer layer. The structure of the composite dust-free paper layer 2 can provide high-quality soft fluffy performance, and the wood pulp fiber component in the dust-free paper material layer 21 is utilized to improve the diffusion performance of the core body, so that the high-molecular water-absorbent resin in the core body is utilized more fully, and the wrapping layer of the traditional core body structure is integrated.
Example 5:
as shown in fig. 4, this example is different from example 4 in that the composite dustless paper layer 2 is provided on the upper layer of the core layer 3 and the composite dustless paper layer 2 is wrapped around the outer layer of the core layer 3. The upper composite dust-free paper layer 2 is arranged, the dust-free paper material layer 21 is arranged on the lower side, and the polypropylene non-woven fabric layer 22 is arranged on the upper layer. And the composite dust-free paper layer 2 is wrapped on the outer layer of the core layer 3, the dust-free paper material layer 21 is positioned on the inner side, and the polypropylene non-woven fabric layer 22 is positioned on the outer layer. The structure of the composite dust-free paper layer 2 can provide high-quality soft fluffy performance, and the wood pulp fiber component in the dust-free paper material layer 21 is utilized to improve the diffusion performance of the core body, so that the high-molecular water-absorbent resin in the core body is utilized more fully, and the wrapping layer of the traditional core body structure is integrated.
Examples 4 and 5 are suitable in the case of diapers in the case of a liner core and an off-line composite core.
Example 6:
as shown in fig. 5, the difference from example 4 is that the composite non-dust paper layer 2 is disposed at the lower layer of the core layer 3, the non-dust paper material layer 21 is located at the upper side, and the polypropylene non-woven fabric layer 22 is located at the lower side. The composite dust-free paper layer 2 can provide high-quality soft fluffy performance and replace the traditional hot air non-woven fabric or spunlace non-woven fabric or traditional dust-free paper. Traditional hot-air non-woven fabrics and spunlace non-woven fabrics mainly comprise chemical fiber components, the diffusion performance after water absorption is poor, and the core body only can utilize macromolecule water-absorbing resin in a local area after water absorption.
The wood pulp fiber in the dust-free paper material layer 21 is utilized to improve the diffusion performance of the core body, so that the high-molecular water-absorbent resin in the core body is more fully utilized, compared with the traditional dust-free paper, the softness is improved by 68%, the strength of the material is improved by 82%, the dust-free paper after the material absorbs water basically has no strength, the attenuation is serious, and the strength of the composite dust-free paper material is not attenuated. The composite dust-free paper provides dual performances of hydrophilic soft spun-bond cloth and dust-free paper, does not need to transform the existing core production line, and is convenient to use.
Example 7:
as shown in fig. 6, the difference from example 6 is that the composite airlaid paper layer 2 is provided on the upper layer of the core layer 3, the airlaid paper material layer 21 is provided on the lower side, and the polypropylene nonwoven fabric layer 22 is provided on the upper side. The wood pulp fiber in the dust-free paper material layer 21 is utilized to improve the diffusion performance of the core body, so that the high-molecular water-absorbent resin in the core body is more fully utilized, compared with the traditional dust-free paper, the softness is improved by 68%, the strength of the material is improved by 82%, the dust-free paper after the material absorbs water basically has no strength, the attenuation is serious, and the strength of the composite dust-free paper material is not attenuated. The composite dust-free paper provides dual performances of hydrophilic soft spun-bond cloth and dust-free paper, does not need to transform the existing core production line, and is convenient to use.
Example 6 and example 7 are suitable for use in diaper off-line composite cores.
For the field of paper diapers, the core layer 3 may be a combination of a high-molecular water-absorbent resin, a fluffy cotton layer, and the like, and the core layer 3 may be conventionally disposed in the field, which is not described again.
The composite dust-free paper layer 2 may be provided in combination of an upper layer and a lower layer of the core layer 3 and an outer layer covering the core layer 3.
The performance criteria for the composite airlaid paper layer 2 of examples 4, 5, 6, and 7 are shown in table 2:
TABLE 2
| Performance of | Unit of | First set of data | Second set of data | Third set of data | Test standard |
| Gram weight | gsm | 45 | 48 | 42 | ASTM D 3776 |
| Thickness in dry state | mm | 0.70 | 0.85 | 0.55 | ASTM D 1777 |
| Longitudinal strength in dry state | N/5cm | 25.0 | 30 | 20.0 | WSP 110.4 |
| Dry transverse strength | N/5cm | 12.0 | 16 | 8.0 | WSP 110.4 |
| Longitudinal softness | g | 18.0 | 25.0 | 10.0 | IST 90.3 |
| Transverse softness | g | 14.0 | 20.0 | 6.0 | IST 90.3 |
| Absorption Capacity | ％ | 1050 | 1200 | 900 | WSP 010.4 |
Claims (10)
1. The polypropylene non-woven fabric is characterized by comprising the following raw materials in percentage by mass:
modified polypropylene material B10-30%, soft additive 0.1-0.6%, white master batch 0.25-0.7%, hydrophilic surfactant 0.5-1.5%, and modified propylene-ethylene copolymer A in balance.
2. The polypropylene nonwoven fabric according to claim 1, wherein the modified propylene-ethylene copolymer A has MFR in the range of 30-40g/10min and a melting point in the range of 50-170 ℃; the modified polypropylene material B has MFR within the range of 40-60g/10min and a melting point within the range of 50-100 ℃.
3. The polypropylene nonwoven fabric as claimed in claim 1, wherein the softening additive has MFR in the range of 500-1800g/10 min.
4. The polypropylene nonwoven fabric according to claim 1, wherein the softening additive is composed of a fatty amide derivative and a polyolefin derivative, and the mass ratio of the fatty amide derivative to the polyolefin derivative is 1: 1.
5. The polypropylene nonwoven fabric according to claim 1, wherein the percentage of the modified propylene-ethylene copolymer a to the modified polypropylene material B in the total mass is 97.95%.
6. A method for preparing a polypropylene nonwoven fabric according to any one of claims 1 to 5, comprising the steps of:
mixing materials: weighing a modified polypropylene material B, a softening additive, a white master batch, a hydrophilic surfactant and a modified propylene-ethylene copolymer A according to a proportion, and adding the modified propylene-ethylene copolymer A, the modified polypropylene material B, the softening additive and the white master batch into a mixing device for mixing;
melt extrusion: the melt extrusion is carried out, wherein the screw temperature of the screw 1.1 is 180-200 ℃; the screw temperature of the screw 1.2 is 200-240 ℃; the temperature of the screw and the connecting area is 230-250 ℃; after melt filtration, melt metering, die head spinning and drafting treatment are carried out according to requirements to obtain spinning;
hot rolling treatment: after the obtained spinning is subjected to a filament dividing and lapping process, the spinning passes through a space between a pattern roller and a smooth roller of a hot rolling mill to be subjected to hot rolling treatment, and online humidification treatment is carried out after the hot rolling treatment;
treating the upper liquid: adding a hydrophilic surfactant, and treating with the hydrophilic surfactant, wherein the oil preparation concentration is 5-15%, the oil groove temperature is 20-40 ℃, the press roll position is 18cm, and the oil roll rotation speed is 15 rpm;
slitting treatment: and cutting after drying, winding and rolling to obtain the non-woven fabric product.
7. The method for preparing the polypropylene non-woven fabric according to claim 7, wherein the melt extrusion is carried out at a temperature of 190 ℃ with a screw 1.1; the temperature of the screw 1.2 is 210 ℃; the temperature of the screw and the connecting zone is from 235 ℃ to 245 ℃.
8. The method as claimed in claim 7, wherein the mesh belt speed in the hot rolling process is 300-1000 m/min, the speed ratio of the hot rolling mill is 0-3.0%, the speed ratio of the cold water roll is 2.0-4.0%, the hot rolling pressure is 60-100 daN/cm, the temperature of the pattern roller is 130-150 ℃, and the temperature of the smooth roller is 120-140 ℃; the compression roller speed ratio of the humidifier is 2.0-4.0%, and the wrap angle of the non-woven fabric and the liquid carrying roller is 20-60 degrees.
9. The use of a polypropylene nonwoven fabric as claimed in any one of claims 1 to 5in a diaper comprising a core layer, wherein the diaper further comprises a composite dust-free paper layer, the composite dust-free paper layer is formed by combining a dust-free paper material layer and a polypropylene nonwoven fabric layer, the dust-free paper layer is arranged on the upper layer, the lower layer and/or the outer layer of the core layer.
10. The use of a polypropylene nonwoven in diapers according to claim 9 characterized in that the grammage of the layer of non-dusting paper material is between 20 and 50 gsm; the gram weight of the polypropylene non-woven fabric layer is 10-18 gsm.
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