CN110306293B - Super-soft non-woven fabric, preparation process and application thereof in baby diapers - Google Patents
Super-soft non-woven fabric, preparation process and application thereof in baby diapers Download PDFInfo
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- CN110306293B CN110306293B CN201910394967.5A CN201910394967A CN110306293B CN 110306293 B CN110306293 B CN 110306293B CN 201910394967 A CN201910394967 A CN 201910394967A CN 110306293 B CN110306293 B CN 110306293B
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000835 fiber Substances 0.000 claims abstract description 35
- 238000005098 hot rolling Methods 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 19
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 8
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 4
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 4
- 238000013329 compounding Methods 0.000 claims abstract 2
- 230000008595 infiltration Effects 0.000 claims abstract 2
- 238000001764 infiltration Methods 0.000 claims abstract 2
- 244000166675 Cymbopogon nardus Species 0.000 claims description 17
- 235000018791 Cymbopogon nardus Nutrition 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 13
- 239000004743 Polypropylene Substances 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 11
- 229920001155 polypropylene Polymers 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000007822 coupling agent Substances 0.000 claims description 10
- QANIADJLTJYOFI-UHFFFAOYSA-K aluminum;magnesium;carbonate;hydroxide;hydrate Chemical compound O.[OH-].[Mg+2].[Al+3].[O-]C([O-])=O QANIADJLTJYOFI-UHFFFAOYSA-K 0.000 claims description 7
- BTXNYTINYBABQR-UHFFFAOYSA-N hypericin Chemical compound C12=C(O)C=C(O)C(C(C=3C(O)=CC(C)=C4C=33)=O)=C2C3=C2C3=C4C(C)=CC(O)=C3C(=O)C3=C(O)C=C(O)C1=C32 BTXNYTINYBABQR-UHFFFAOYSA-N 0.000 claims description 7
- 229940005608 hypericin Drugs 0.000 claims description 7
- PHOKTTKFQUYZPI-UHFFFAOYSA-N hypericin Natural products Cc1cc(O)c2c3C(=O)C(=Cc4c(O)c5c(O)cc(O)c6c7C(=O)C(=Cc8c(C)c1c2c(c78)c(c34)c56)O)O PHOKTTKFQUYZPI-UHFFFAOYSA-N 0.000 claims description 7
- SSKVDVBQSWQEGJ-UHFFFAOYSA-N pseudohypericin Natural products C12=C(O)C=C(O)C(C(C=3C(O)=CC(O)=C4C=33)=O)=C2C3=C2C3=C4C(C)=CC(O)=C3C(=O)C3=C(O)C=C(O)C1=C32 SSKVDVBQSWQEGJ-UHFFFAOYSA-N 0.000 claims description 7
- SMGIMBKCWODARY-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,7,7,7-dodecafluoroheptyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)CC(F)(F)F SMGIMBKCWODARY-UHFFFAOYSA-N 0.000 claims description 5
- LCPUCXXYIYXLJY-UHFFFAOYSA-N 1,1,2,4,4,4-hexafluorobutyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(F)CC(F)(F)F LCPUCXXYIYXLJY-UHFFFAOYSA-N 0.000 claims description 5
- 239000004595 color masterbatch Substances 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009987 spinning Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 16
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 12
- QRYRORQUOLYVBU-VBKZILBWSA-N carnosic acid Chemical compound CC([C@@H]1CC2)(C)CCC[C@]1(C(O)=O)C1=C2C=C(C(C)C)C(O)=C1O QRYRORQUOLYVBU-VBKZILBWSA-N 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 229910052785 arsenic Inorganic materials 0.000 description 7
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 7
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- 239000002344 surface layer Substances 0.000 description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 5
- 239000004594 Masterbatch (MB) Substances 0.000 description 4
- 244000269722 Thea sinensis Species 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000006408 oxalic acid Nutrition 0.000 description 4
- 150000008442 polyphenolic compounds Chemical class 0.000 description 4
- 235000013824 polyphenols Nutrition 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 238000004049 embossing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920001410 Microfiber Polymers 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
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- 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
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
-
- 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
- A61F13/47—Sanitary towels, incontinence pads or napkins
- A61F13/476—Sanitary towels, incontinence pads or napkins characterised by encircling the crotch region of the undergarment, e.g. with flaps
-
- 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 of the pads
- A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
- A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
-
- 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
- D01D5/12—Stretch-spinning methods
-
- 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
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- 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
- D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Epidemiology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dermatology (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
- Artificial Filaments (AREA)
Abstract
The invention provides an ultra-soft non-woven fabric, the shrinkage rate is 0.16-0.20%, and the infiltration amount is 0.18-0.20 g; the preparation process of the ultra-soft non-woven fabric comprises the steps of raw material preparation, compounding and mixing, melt extrusion, drafting and hot rolling treatment. The drawing is to add 4-12% of magnesium-aluminum hydrotalcite and 1-3% of SDS into the primary melt, mix, carry out spinning drawing through a melt-blowing die head, and solidify to obtain superfine fibers; the superfine fiber obtained in the middle of the invention has no defects, high density and high breaking strength; the obtained super-soft non-woven fabric has high softness, low shrinkage and low rewet amount, not only maintains good softness, but also has excellent anti-wrinkling effect and anti-rewet effect, and is widely applied to baby diapers.
Description
Technical Field
The invention belongs to the technical field of non-woven fabrics, and relates to an ultra-soft non-woven fabric, in particular to an ultra-soft non-woven fabric, a preparation process and application thereof in baby diapers.
Background
As is known to all, most of the existing spun-bonded non-woven fabrics take single polypropylene as a raw material, and the spun-bonded non-woven fabrics have certain elasticity, but have the defects of rough and hard hand feeling, greater plastic feeling than cloth feeling, low strength, easy generation of breakage, poor air permeability and the like under the action of external force.
Chinese patent No. CN104562452B discloses an ultra-soft fluffy non-woven fabric, which comprises a double-layer structure of a surface layer and a bottom layer, wherein the surface layer is composed of more than 95% of bicomponent fibers with a fiber surface melting point of less than 140 ℃ and less than 5% of fibers with a fiber surface melting point of more than 140 ℃; the bottom layer is composed of 30-90% of bicomponent fiber with the fiber surface melting point less than 140 ℃ and 10-70% of fiber with the fiber surface melting point more than 140 ℃, the surface layer and the bottom layer are compounded into non-woven fabric through hot air, the gram weight of the surface layer in square meters is 10-25 grams/square meter, the gram weight of the bottom layer in square meters is 10-40 grams/square meter, and the three-dimensional thickness of the non-woven fabric is 0.4-5 mm; the surface layer has a large number of fiber bonding points, the smooth and exquisite surface layer is formed, the bottom layer has a small number of fiber bonding points, and a thick and fluffy bottom layer is formed, so that the three-dimensional thickness of the non-woven fabric is improved.
The patent with publication number CN103158283A discloses a super soft non-woven fabric, including non-woven fabric surface course and non-woven fabric bottom, all be equipped with the concave or convex elasticity unsmooth texture of evagination on non-woven fabric surface course and the non-woven fabric bottom. The non-woven fabric is simple in structure, convenient to process, softer and elastic; patent with application number CN201510930916.1 discloses a fluffy non-woven fabrics of super gentle, the outmost is superfine fiber, the intermediate level is high performance fiber, the bond line is heat conduction silica gel, has characteristics such as good, the compliance of hydroscopicity, compliance is good, the gas permeability is good, toughness is strong.
Disclosure of Invention
The invention provides an ultra-soft non-woven fabric, a preparation process and application thereof in baby diapers, aiming at solving the technical problems of the existing non-woven fabric, and the following aims are achieved:
(1) according to the preparation process of the ultra-soft non-woven fabric, the ultra-fine fiber obtained in the middle has the advantages of no defects, high density and high breaking strength;
(2) according to the preparation process of the ultra-soft non-woven fabric, the mesh belt speed in the hot rolling treatment process is high, the treatment speed is high on the premise of ensuring the quality to be unchanged, and the working efficiency is improved;
(3) the super-soft non-woven fabric disclosed by the invention is high in softness, low in shrinkage rate and low in rewet amount, not only maintains good softness, but also has excellent anti-wrinkling effect and anti-rewet effect, and is widely applied to baby diapers.
In order to solve the technical problems, the following technical scheme is adopted:
an ultra-soft non-woven fabric, wherein when the gram weight of the ultra-soft non-woven fabric is 15g, the shrinkage rate is 0.16-0.20%, and the rewet amount is 0.18-0.20 g.
The following is a more preferred technical scheme of the invention:
the super-soft non-woven fabric has the softness of 2.45-3.00g when the gram weight is 15 g.
The invention relates to a preparation process of an ultra-soft non-woven fabric, which comprises the following steps:
(1) preparing raw materials:
the masterbatch required for the ultra-soft nonwoven fabric of the embodiment comprises:
70-120 parts of polypropylene, 1-4 parts of coupling agent, 1-3 parts of zinc stearate, 3-5 parts of silicone oil essence HK-366A, 0.5-1.5 parts of color master batch titanium dioxide, 0-1 part of oxidant, 0.5-1.5 parts of citronella grass powder and 0-0.5 part of hypericin.
The polypropylene has the tensile yield strength of 30-50MPa and the MFR range of 32-40g/10 min.
The coupling agent is composed of methacrylic acid dodecafluoroheptyl ester and methacrylic acid hexafluorobutyl ester in a mass ratio of 1-5: 2.
100% of the citronella grass powder is sieved by a 400-mesh sieve, the tea polyphenol content is 5.5%, the ash content is less than or equal to 3.2%, the carnosic acid content is more than or equal to 35%, the citronella oxalic acid content is more than or equal to 10%, the heavy metal content is less than or equal to 5ppm, the lead content is less than or equal to 1ppm, the arsenic content is less than or equal to 0.5ppm, and the mercury content is less than or equal to 0.4 ppm, and the citronella grass powder is sold in the market.
The hypericin has the effective component content of 0.8-1%, the granularity of 200 meshes and 300 meshes, the heavy metal content of less than or equal to 10ppm and the arsenic content of less than or equal to 0.5 ppm.
(2) Compound mixing
The raw materials in parts by weight are mixed and heated and melted in a main screw according to the proportion of parts by weight by adopting a plurality of feeding screws respectively.
(3) Melt extrusion
Melting the compounded and mixed melted raw materials, filtering out impurities in the raw materials, and extruding to obtain a primary melt.
(4) Drawing
Adding 4-12% of magnesium-aluminum hydrotalcite and 1-3% of SDS into the primary melt, mixing, carrying out spinning and drawing through a melt-blowing die head, and solidifying to obtain the superfine fiber.
The drafting is secondary hot drafting, the drafting ratio of the primary hot drafting is 0.8-2, the drafting ratio of the secondary hot drafting is 3-3.5, the drafting wind pressure is 2-6Kpa, and the temperature is 50-60 ℃.
The magnesium-aluminum hydrotalcite powder has fineness of 0.5 μm, pH value of 6-9, water content of 0.5% or less (105 deg.C, 1 hr), and specific surface area BET of 15m2The CAS number is 11097-59-9.
The superfine fiber has smooth hand feeling, complete extension, uniform and consistent hardness, 99.2-99.99% of uniformity and 0-0.0011% of hard block rate. Has larger cohesive force and is less easy to disperse compared with the conventional superfine fiber, and the density is 0.82-0.97g/cm3The breaking strength is 707-756MPa, and the fineness is 1-6 denier.
(5) Hot rolling treatment:
the superfine fibers are subjected to splitting and lapping to obtain S layers, and the three S layers are sequentially stacked and orderly placed into a hot rolling mill for hot rolling treatment; during hot rolling, the mesh belt speed is 1000-1600m/min, the hot rolling pressure is 85-95daN/cm, the temperature of the embossing roller is 150-165 ℃, and the temperature of the smooth roller is 140-160 ℃.
After hot rolling, drying, winding and slitting, the ultra-soft non-woven fabric is obtained.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages:
(1) the superfine fiber obtained in the preparation process of the super-soft non-woven fabric has the density of 0.82-0.97g/cm3The breaking strength is 707-755MPa, and the fineness is 1-6 denier;
(2) according to the preparation process of the ultra-soft non-woven fabric, the mesh belt speed in the hot rolling treatment process is 1000-1600m/min, the treatment speed is high on the premise of ensuring that the quality is not changed, and the working efficiency is improved;
(3) the super-soft non-woven fabric disclosed by the invention is high in softness, low in shrinkage rate and low in rewet amount, not only keeps good softness, but also has excellent anti-wrinkling effect and anti-rewet effect, and is widely applied to baby diapers; the softness is 2.45-3.00g, the shrinkage is 0.16-0.20%, and the rewet amount is 0.18-0.20 g.
Detailed Description
Example 1 preparation Process of ultra-Soft non-woven Fabric and ultra-Soft non-woven Fabric obtained
The invention relates to a preparation process of an ultra-soft non-woven fabric, which comprises the following steps:
(1) preparing raw materials:
the masterbatch required for the ultra-soft nonwoven fabric of the embodiment comprises:
70 parts of polypropylene, 4 parts of coupling agent, 1 part of zinc stearate, 5 parts of silicone oil essence HK-366A, 0.5 part of color master batch titanium dioxide, 1 part of oxidant, 0.5 part of citronella grass powder and 0.5 part of hypericin.
The tensile yield strength of the polypropylene is 30MPa, and the MFR range is 40g/10 min;
the coupling agent is composed of methacrylic acid dodecafluoroheptyl ester and methacrylic acid hexafluorobutyl ester in a mass ratio of 1: 2;
100% of the citronella grass powder is sieved by a 400-mesh sieve, the tea polyphenol content is 5.5%, the ash content is less than or equal to 3.2%, the carnosic acid content is more than or equal to 35%, the citronella oxalic acid content is more than or equal to 10%, the heavy metal content is less than or equal to 5ppm, the lead content is less than or equal to 1ppm, the arsenic content is less than or equal to 0.5ppm, and the mercury content is less than or equal to 0.4 ppm, and the citronella grass powder is sold in the market;
the hypericin has an effective component content of 0.8%, a granularity of 300 meshes, a heavy metal content of less than or equal to 10ppm, and an arsenic content of less than or equal to 0.5 ppm.
(2) Compound mixing
The raw materials in parts by weight are mixed and heated and melted in a main screw according to the proportion of parts by weight by adopting a plurality of feeding screws respectively.
(3) Melt extrusion
Melting the compounded and mixed melted raw materials, filtering out impurities in the raw materials, and extruding to obtain a primary melt.
(4) Drawing
Adding 4% of magnesium-aluminum hydrotalcite powder and 3% of SDS into the primary melt, mixing, carrying out spinning and drafting through a melt-blowing die head, and solidifying to obtain the superfine fiber.
The drafting is secondary hot drafting, the drafting ratio of the primary hot drafting is 0.8, the drafting ratio of the secondary hot drafting is 3.5, the drafting wind pressure is 2Kpa, and the temperature is 60 ℃.
The magnesium-aluminum hydrotalcite powder has fineness of 0.5 μm, pH value of 9, water content of 0.5% or less (105 deg.C, 1 hr), and specific surface area BET of 15m2The CAS number is 11097-59-9.
The superfine fiber has smooth hand feeling, complete extension, uniform and consistent hardness, 99.2 percent of uniformity and 0.0010 percent of hard block rate. Has larger cohesive force and less easy dispersion than the conventional superfine fiber, and the density is 0.93g/cm3The breaking strength is 717MPa, and the fineness is 1 to 6 denier.
(5) Hot rolling treatment:
the superfine fibers are subjected to splitting and lapping to obtain S layers, and the three S layers are sequentially stacked and orderly placed into a hot rolling mill for hot rolling treatment; during hot rolling, the mesh belt speed is 1000m/min, the hot rolling pressure is 95daN/cm, the temperature of the embossing roll is 150 ℃, and the temperature of the smooth roll is 160 ℃.
After hot rolling, drying, winding and slitting, the ultra-soft non-woven fabric is obtained.
Example 2 preparation process of ultra-soft non-woven fabric and ultra-soft non-woven fabric obtained by preparation process
The invention relates to a preparation process of an ultra-soft non-woven fabric, which comprises the following steps:
(1) preparing raw materials:
the masterbatch required for the ultra-soft nonwoven fabric of the embodiment comprises:
100 parts of polypropylene, 3 parts of coupling agent, 2 parts of zinc stearate, 4 parts of silicone oil essence HK-366A, 1.0 part of color master batch titanium dioxide, 0.3 part of oxidant, 0.8 part of citronella grass powder and 0.1 part of hypericin.
The tensile yield strength of the polypropylene is 40MPa, and the MFR range is 35g/10 min;
the coupling agent is composed of methacrylic acid dodecafluoroheptyl ester and methacrylic acid hexafluorobutyl ester in a mass ratio of 3: 2;
100% of the citronella grass powder is sieved by a 400-mesh sieve, the tea polyphenol content is 5.5%, the ash content is less than or equal to 3.2%, the carnosic acid content is more than or equal to 35%, the citronella oxalic acid content is more than or equal to 10%, the heavy metal content is less than or equal to 5ppm, the lead content is less than or equal to 1ppm, the arsenic content is less than or equal to 0.5ppm, and the mercury content is less than or equal to 0.4 ppm, and the citronella grass powder is sold in the market;
the hypericin has an effective component content of 0.9%, a granularity of 300 meshes, a heavy metal content of less than or equal to 10ppm and an arsenic content of less than or equal to 0.5 ppm.
(2) Compound mixing
The raw materials in parts by weight are mixed and heated and melted in a main screw according to the proportion of parts by weight by adopting a plurality of feeding screws respectively.
(3) Melt extrusion
Melting the compounded and mixed melted raw materials, filtering out impurities in the raw materials, and extruding to obtain a primary melt.
(4) Drawing
And adding 10% of magnesium-aluminum hydrotalcite powder and 2% of SDS (sodium dodecyl sulfate) into the primary melt, mixing, carrying out spinning and drafting through a melt-blowing die head, and solidifying to obtain the superfine fiber.
The drafting is secondary hot drafting, the drafting ratio of the primary hot drafting is 1.3, the drafting ratio of the secondary hot drafting is 3.1, the drafting wind pressure is 3Kpa, and the temperature is 57 ℃.
The magnesium-aluminum hydrotalcite powder has fineness of 0.5 μm, pH value of 8.2, water content of 0.5% or less (105 deg.C, 1 hr), and specific surface area BET of 15m2The CAS number is 11097-59-9.
The superfine fiber has smooth hand feeling, complete extension, uniform and consistent hardness, 99.7 percent of uniformity and 0.0002 percent of hard block rate. Has larger cohesive force and less easy dispersion than the conventional superfine fiber, and the density is 0.96g/cm3The breaking strength is 755MPa, and the fineness is 1 to 6 denier.
(5) Hot rolling treatment:
the superfine fibers are subjected to splitting and lapping to obtain S layers, and the three S layers are sequentially stacked and orderly placed into a hot rolling mill for hot rolling treatment; during hot rolling, the mesh belt speed is 1500m/min, the hot rolling pressure is 91daN/cm, the temperature of a pattern roller is 162 ℃, and the temperature of a smooth roller is 150 ℃.
After hot rolling, drying, winding and slitting, the ultra-soft non-woven fabric is obtained.
Example 3 preparation Process of ultra-Soft non-woven Fabric and ultra-Soft non-woven Fabric obtained
The invention relates to a preparation process of an ultra-soft non-woven fabric, which comprises the following steps:
(1) preparing raw materials:
the masterbatch required for the ultra-soft nonwoven fabric of the embodiment comprises:
120 parts of polypropylene, 1 part of coupling agent, 3 parts of zinc stearate, 3 parts of silicone oil essential HK-366A, 1.5 parts of color master batch titanium dioxide and 1.5 parts of citronella grass powder.
The tensile yield strength of the polypropylene is 30-50MPa, and the MFR range is 32-40g/10 min;
the coupling agent is composed of methacrylic acid dodecafluoroheptyl ester and methacrylic acid hexafluorobutyl ester in a mass ratio of 1-5: 2;
100% of the citronella grass powder is sieved by a 400-mesh sieve, the tea polyphenol content is 5.5%, the ash content is less than or equal to 3.2%, the carnosic acid content is more than or equal to 35%, the citronella oxalic acid content is more than or equal to 10%, the heavy metal content is less than or equal to 5ppm, the lead content is less than or equal to 1ppm, the arsenic content is less than or equal to 0.5ppm, and the mercury content is less than or equal to 0.4 ppm, and the citronella grass powder is sold in the market.
(2) Compound mixing
The raw materials in parts by weight are mixed and heated and melted in a main screw according to the proportion of parts by weight by adopting a plurality of feeding screws respectively.
(3) Melt extrusion
Melting the compounded and mixed melted raw materials, filtering out impurities in the raw materials, and extruding to obtain a primary melt.
(4) Drawing
And adding 12% of magnesium-aluminum hydrotalcite and 1% of SDS into the primary melt, mixing, carrying out spinning and drafting through a melt-blowing die head, and solidifying to obtain the superfine fiber.
The drafting is secondary hot drafting, the drafting ratio of the primary hot drafting is 2, the drafting ratio of the secondary hot drafting is 3.0, the drafting wind pressure is 6Kpa, and the temperature is 50 ℃.
The magnesium-aluminum hydrotalcite powder has fineness of 0.5 μm, pH value of 9, water content of 0.5% or less (105 deg.C, 1 hr), and specific surface area BET of 15m2The CAS number is 11097-59-9.
The superfine fiber has smooth hand feeling, complete extension and uniform hardnessThe uniformity was 99.2%, and the hard block rate was 0.0011%. Has larger cohesive force and less easy dispersion than the conventional superfine fiber, and the density is 0.97g/cm3The breaking strength is 721MPa, and the fineness is 1 to 6 denier.
(5) Hot rolling treatment:
the superfine fibers are subjected to splitting and lapping to obtain S layers, and the three S layers are sequentially stacked and orderly placed into a hot rolling mill for hot rolling treatment; during hot rolling, the mesh belt speed is 1600m/min, the hot rolling pressure is 85daN/cm, the temperature of a pattern roller is 166 ℃, and the temperature of a smooth roller is 140 ℃.
After hot rolling, drying, winding and slitting, the ultra-soft non-woven fabric is obtained.
Comparative example 1:
on the basis of example 2, only step (4) was changed, the rest being the same:
and (4): and (3) carrying out spinning and drafting on the primary melt through a melt-blowing die head, and solidifying to obtain the superfine fiber.
The drafting is secondary hot drafting, the drafting ratio of the primary hot drafting is 0.8-2, the drafting ratio of the secondary hot drafting is 3-3.5, the drafting wind pressure is 2-6Kpa, and the temperature is 50-60 ℃.
The obtained superfine fiber has smooth hand feeling, complete extension, uniform and consistent hardness, uniformity of 95.0%, hard block rate of 0.125%, fineness of 1-6 denier and density of 0.85g/cm3And the breaking strength is 422 MPa.
Ultra-soft nonwoven fabrics (15 g for example) obtained according to the process for preparing nonwoven fabrics described in examples 1-3 were characterized as follows;
example 4 application of ultra-soft non-woven Fabric to baby diapers
In the application of the super-soft non-woven fabric in baby diaper of this embodiment, the super-soft non-woven fabric obtained in embodiment 2 is used as the water-repellent cloth of the baby diaper to replace the water-repellent cloth on the existing diaper, so that the baby diaper is obtained.
The baby diaper comprises a skin-friendly non-woven fabric, wood pulp, high-molecular water-absorbent resin, a flow guide layer, water-repellent cloth, a PE film, an elastic PE film and a magic buckle;
the preparation method of the baby diaper comprises the conventional preparation method, and the details are not repeated.
This embodiment adopts the not wet beneficial effect of baby's urine of super gentle non-woven fabrics preparation:
(1) the production cost is low, the material is rich in flexibility, the use comfort is good, the deformation is not easy to occur, the liquid is not easy to seep from the crotch part, and the side leakage prevention effect is good; (2) the bacteriostatic effect is more obvious; (3) the processing is convenient, the adsorption can be fast, and the reverse leakage liquid is not easy to occur.
In conclusion, the ultra-soft non-woven fabric provided by the invention adopts the technical scheme, and compared with the prior art, the ultra-soft non-woven fabric has the following advantages:
(1) the superfine fiber obtained by the preparation process of the super-soft non-woven fabric has no defects and the density of 0.97g/cm3The breaking strength is 707MPa, and the fineness is 1 to 6 denier;
(2) according to the preparation process of the ultra-soft non-woven fabric, the mesh belt speed in the hot rolling treatment process is 1000-1600m/min, the treatment speed is high on the premise of ensuring that the quality is not changed, and the working efficiency is improved;
(3) the super-soft non-woven fabric disclosed by the invention is high in softness, low in shrinkage rate and low in rewet amount, not only keeps good softness, but also has excellent anti-wrinkling effect and anti-rewet effect, and is widely applied to baby diapers; the softness is 2.45-3.00g, the shrinkage is 0.16-0.20%, and the rewet amount is 0.18-0.20 g.
All percentages used herein are weight percentages and all ratios described herein are mass ratios, unless otherwise indicated.
Finally, it should be noted that: 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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An ultra-soft non-woven fabric is characterized in that,
the shrinkage rate of the ultra-soft non-woven fabric is 0.16-0.20%, and the infiltration amount is 0.18-0.20 g;
the preparation process of the ultra-soft non-woven fabric comprises the steps of raw material preparation, compounding and mixing, melt extrusion, drafting and hot rolling treatment;
the preparation method comprises the following steps of: 70-120 parts of polypropylene, 1-4 parts of coupling agent, 1-3 parts of zinc stearate, 3-5 parts of silicone oil essence HK-366A, 0.5-1.5 parts of color master batch titanium dioxide, 0-1 part of oxidant, 0.5-1.5 parts of citronella grass powder and 0-0.5 part of hypericin;
the drawing is to add 4-12wt% of magnesium-aluminum hydrotalcite and 1-3wt% of SDS into the primary melt, mix, perform jet drawing through a melt-blowing die head, and solidify to obtain superfine fibers;
the magnesium-aluminum hydrotalcite powder has fineness of 0.5 μm, pH of 6-9, water content of less than or equal to 0.5% measured at 105 deg.C for 1 hr, and specific surface area BET15m2/g。
2. An ultra-soft nonwoven fabric according to claim 1,
the tensile yield strength of the polypropylene is 30-50MPa, and the MFR range is 32-40g/10 min;
the coupling agent is composed of methacrylic acid dodecafluoroheptyl ester and methacrylic acid hexafluorobutyl ester in a mass ratio of 1-5: 2.
3. An ultra-soft nonwoven fabric according to claim 1,
the drafting is secondary hot drafting, the drafting ratio of the primary hot drafting is 0.8-2, the drafting ratio of the secondary hot drafting is 3-3.5, the drafting wind pressure is 2-6Kpa, and the temperature is 50-60 ℃.
4. An ultra-soft nonwoven fabric according to claim 1,
the density of the superfine fiber is 0.82-0.97g/cm3The breaking strength is 707-756MPa, and the fineness is 1-6 denier.
5. An ultra-soft nonwoven fabric according to claim 1,
the hot rolling treatment has the mesh belt speed of 1000-1600m/min and the smooth roll temperature of 140-160 ℃.
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