CN109009679B - Breathable film for paper diaper and preparation method thereof - Google Patents
Breathable film for paper diaper and preparation method thereof Download PDFInfo
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- CN109009679B CN109009679B CN201810759739.9A CN201810759739A CN109009679B CN 109009679 B CN109009679 B CN 109009679B CN 201810759739 A CN201810759739 A CN 201810759739A CN 109009679 B CN109009679 B CN 109009679B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 230000002940 repellent Effects 0.000 claims abstract description 13
- 239000005871 repellent Substances 0.000 claims abstract description 13
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 12
- 239000002086 nanomaterial Substances 0.000 claims abstract description 11
- 239000004014 plasticizer Substances 0.000 claims abstract description 11
- 239000002861 polymer material Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 24
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- 229920002488 Hemicellulose Polymers 0.000 claims description 16
- 229920001661 Chitosan Polymers 0.000 claims description 15
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 15
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical group CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 12
- 239000000413 hydrolysate Substances 0.000 claims description 12
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 10
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 10
- IPCSVZSSVZVIGE-UHFFFAOYSA-N palmitic acid group Chemical group C(CCCCCCCCCCCCCCC)(=O)O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000007872 degassing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229940075507 glyceryl monostearate Drugs 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 6
- 235000021314 Palmitic acid Nutrition 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- 239000004922 lacquer Substances 0.000 claims description 5
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 5
- 229960004063 propylene glycol Drugs 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 229920005615 natural polymer Polymers 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 25
- 210000002700 urine Anatomy 0.000 abstract description 9
- 230000004888 barrier function Effects 0.000 abstract description 3
- 210000001217 buttock Anatomy 0.000 abstract description 3
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 30
- 239000000835 fiber Substances 0.000 description 17
- 238000010521 absorption reaction Methods 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000002250 absorbent Substances 0.000 description 10
- 230000002745 absorbent Effects 0.000 description 10
- 239000012792 core layer Substances 0.000 description 8
- 239000004745 nonwoven fabric Substances 0.000 description 7
- 210000002469 basement membrane Anatomy 0.000 description 6
- 210000004379 membrane Anatomy 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000036541 health Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012982 microporous membrane Substances 0.000 description 3
- 239000002121 nanofiber Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 206010012444 Dermatitis diaper Diseases 0.000 description 1
- 208000003105 Diaper Rash Diseases 0.000 description 1
- 235000006679 Mentha X verticillata Nutrition 0.000 description 1
- 235000002899 Mentha suaveolens Nutrition 0.000 description 1
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 1
- 238000009825 accumulation Methods 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
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- A61F2013/51409—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film
Landscapes
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The invention discloses a breathable film for paper diapers and a preparation method thereof, wherein a bottom film layer of the existing paper diaper is replaced by the breathable film; the breathable film is a composite film material consisting of a natural high polymer material, a nano material, an emulsifier, a water repellent, a plasticizer and a viscosity agent, has water resistance, barrier property, air permeability and antibacterial property, has certain mechanical strength, increases the comfort, safety and usability of the diaper, and thoroughly solves the problems of urine leakage and red and swollen buttocks of a baby when the baby wears the diaper; meanwhile, the breathable film can be applied to the market of adult diapers and female sanitary napkins, and has good market development prospect.
Description
Technical Field
The invention relates to the field of sanitary products, in particular to a breathable film for a paper diaper and a preparation method thereof.
Background
A paper diaper is a sanitary article commonly used by infants. Generally, diapers are composed of three main parts: surface coating layer, absorption core layer and base fabric. The surface coating may also be referred to as a coating. The absorbent core layer may also be referred to as an absorbent core, or absorbent body. The coating layer is tightly attached to the body of a baby, can promote the urine to quickly permeate and effectively prevent the urine from permeating back, so that the surface layer of the diaper is kept dry and comfortable. The coating of panty-shape diapers on the domestic market at present is the non-woven fabrics surface course basically, and ventilative non-woven fabrics can promote the inside ventilative degree of panty-shape diapers, and vapor can circulate outside the panty-shape diapers, and in time discharge moisture and steam effectively reduce the chance that the diaper rash takes place, and soft comfortable not amazing skin. The absorbent core layer may also be referred to as an absorbent core. The main function of the absorbent core is to be able to capture and quickly absorb urine, disperse it or to spread it throughout the core by capillary action, ultimately absorbing and storing urine. At present, the absorbent core layer of the paper diaper on the domestic market is mainly of a layered structure consisting of pure wood pulp (fluff pulp) and super absorbent resin (SAP). The base fabric is the outermost structure of the paper diaper, has water impermeability, and can prevent water in the absorption core layer from seeping. The base fabric of many paper diapers abroad is made of non-woven fabric which is comfortable, but the base fabric of the paper diapers in domestic market is still mainly made of PE film due to higher price.
Through market research, factors such as air permeability, water absorption, comfort, dryness, safety and the like are five main factors considered when mothers choose paper diapers, wherein the air permeability is particularly important. The air permeability is actually water vapor permeability, and can be expressed by a water vapor transmission amount (g/cm.24h) and also by a unit area air transmission amount (CFM).
The latest structure of the prior paper diaper is mainly divided into a surface layer, an instantaneous absorption flow guide layer, an absorption core layer, a bottom film and other functional components. The bottom membrane of the paper diaper sold in the market is generally a PP microporous membrane or a hot-rolled non-woven PE composite membrane, and the difference between the diameters of water drops (the minimum fog drop diameter is 10 mu m) and vapor molecules (the diameter is 0.4nm) is utilized to realize that the water drops cannot permeate but the vapor molecules can permeate, so that the waterproof and breathable effects are achieved. The bottom film of the paper diaper is a main influence factor of the air permeability of the paper diaper, and directly influences the air permeability of the whole paper diaper, so that the comfort of an infant when wearing the paper diaper is influenced.
The paper diaper sold in the market at present mainly utilizes the PP or PE stretched microporous membrane to realize the waterproof and breathable functions of the bottom membrane of the paper diaper, but the PP or PE microporous membrane is difficult to simultaneously meet high waterproofness and good breathability. The waterproof and breathable functions of the paper diapers are realized by adopting PP or PE microporous membranes in several best-sold high-end paper diapers in the current market, wherein the maximum water pressure of a bottom membrane of each paper diaper is not more than 1600mmH after the air permeability and water pressure resistance tests2O, the air permeability is preferably not more than 0.1 CFM; in fact, good breathability of the diaper can only be ensured if the breathability of the base film reaches or exceeds 0.5CFM2, or if the water vapor permeability reaches 8000g/cm 24 h. According to daily use conditions, after the absorption core layer in the breathable paper diaper sold on the market at present fully absorbs urine, the urine can permeate into the trousers through the basement membrane to stain the trousers when the baby sits in a sitting posture. Therefore, the good bottom film of the paper diaper not only needs to meet good air permeability, but also needs to meet good waterproof permeability.
In addition, the production technology of the bottom film of the domestic paper diaper is still in a lower level at present, and the bottom film used by the domestic high-end diaper mainly depends on the import from abroad.
The patent CN201510505147.0 discloses a preparation method of a waterproof breathable paper diaper basement membrane, and provides the waterproof breathable paper diaper basement membrane which comprises a substrate layer and a waterproof breathable layer compounded with the substrate layer, wherein the substrate layer is a non-woven fabric fiber layer with the air permeability of 100-700 CFM and the thickness of 5-20 GSM, and the waterproof breathable layer is a nanofiber pile layer. Also provides a preparation method of the waterproof breathable paper diaper basement membrane by utilizing high hydrophobicityThe molecular resin is subjected to mass production high-voltage electrostatic spinning equipment, electrostatic spinning is directly carried out on the superfine fiber non-woven fabric to form a nanofiber accumulation body, and the water pressure resistance of the produced paper diaper bottom film compounded by the nanofiber and the superfine fiber non-woven fabric can reach 4000mmH2O, air permeability of 3CFM or more, and water vapor permeability of 10000g/cm2Over 24 hours, fills the blank of the production of basement membranes with high water resistance and air permeability in China, and thoroughly solves the problems of urine leakage and red and swollen buttocks when the baby wears the paper diaper.
Disclose a body surface height antibiotic, super absorbent, ventilative healthy function dry and comfortable panty-shape diapers in patent CN201510322278.5, panty-shape diapers include crotch portion liquid absorption district, crotch portion liquid absorption district includes the surface course of pressing close to skin, from the layer that absorbs water that sets gradually downwards, outside ventilative leak protection membrane, its characterized in that: the surface layer comprises a hydroentangled integrated non-woven base fabric which is formed by performing hydroentanglement reinforcement on a pseudo-bonded spunbond fiber net in an online or offline manner and is provided with an entanglement bonding layer as a middle layer, a carded fiber layer as a surface layer and a pseudo-bonded spunbond fiber layer as a bottom layer, the carded fiber net is carded into a net by hydrophilic short fibers containing chitosan fibers and mint fibers, the pseudo-bonded spunbond fiber net is formed by performing hot rolling reinforcement on thermoplastic fiber filaments subjected to modulus reduction treatment and hydrophilic treatment after being spun into a net, the bonding force generated by hot rolling bonding points among the fibers of the pseudo-bonded spunbond fiber net is smaller than the strength of the thermoplastic fiber filaments, the carded fiber layer is attached to the skin, and the pseudo-bonded spunbond fiber layer is combined with the water absorption layer.
The utility model patent publication No. CN2335608 "paper diaper with improved structure" discloses a paper diaper with improved structure which can generate convection air to improve air permeability and has no wrinkle to generate elasticity. The utility model discloses an its structure of disposable diaper has the ventilative pad of one deck mainly to put in the interval of PE skin and absorption sandwich layer, and this adoption PE material utensil elasticity complex ventilative pad surface has a plurality of cross frame ribs that are the arcuation uplift, makes the closely pressfitting molding of the cotton layer of absorption and the non-woven fabrics permeable formation that the top surface covers be the hemispherical surface in relief by this cross frame rib to make the cotton layer of absorption that uses the paper pulp material to make as the main part still spongy or warp into the block piece and still have good gas permeability behind the absorption secretion.
A diaper disclosed in the utility model publication No. CN2484929, a diaper, has an absorbent pad and a protective edge for preventing side leakage, and a ventilation hole is provided at the front end of the diaper. In order to increase the air permeability of the paper diaper, the protective edges are positioned at the two sides of the middle part and the rear part of the paper diaper. The paper diaper is breathable and can prevent side leakage.
The utility model discloses a panty-shape diapers that "a super ventilative panty-shape diapers" disclose at utility model patent that publication number is CN2810556 includes outside leak protection layer and inside water absorption pad, its characterized in that absorbs water and fills up both ends and link to each other with the leak protection layer front and back both ends that correspond respectively, and be equipped with the opening at leak protection layer front end, the relative water absorption pad outside with this opening is equipped with the leak protection layer section, set up the opening of ventilative usefulness simultaneously at leak protection layer front end, make leak protection layer and absorb water between the pad and the opening forms ventilative passageway, thereby the air permeability of super ventilative panty-shape diapers has effectively been improved.
The utility model discloses a be used for the health care articles for use on disposable health supplies such as disposable diaper, sanitary towel that have good gas permeability that utility model patent "health care articles for use that have good gas permeability" that publication number is CN201618018U, compare with prior art, this health care articles for use all is equipped with longitudinal arrangement or transverse arrangement's ventilative groove on the absorbed layer, and this kind of ventilative groove falls into foldable vertical or two parts with the absorbed layer, improves its gas permeability through the ventilative groove of addding longitudinal arrangement or transverse arrangement on the absorbed layer.
Disclosure of Invention
The invention further improves the air permeability and increases the bacteriostasis and the hydrophobic barrier property on the basis of the patents, so that the paper diaper is bacteriostatic, breathable and dry on one hand, and the liquid is difficult to seep out after absorbing liquid on the other hand.
The invention adopts the following scheme: a breathable film for paper diapers and a preparation method thereof are disclosed, wherein the breathable film replaces a bottom film layer of the existing paper diapers with the breathable film.
Preferably, the breathable film is a composite film material consisting of a natural high polymer material, a nano material, a water repellent, a plasticizer and a viscosity agent.
Preferably, the natural polymer material of the invention is chitosan and hemicellulose.
Preferably, the nano material is nano titanium dioxide or nano zinc oxide.
Preferably, the water repellent is palmitic acid, stearic acid or lacquer wax.
Preferably, the plasticizer is glycerol, sorbitol and 1, 2-propylene glycol.
Preferably, the emulsifier of the present invention is glyceryl monostearate or starch.
Preferably, the viscosity agent of the invention is hydroxypropyl methylcellulose (HPMC) and polyvinyl alcohol.
Preferably, the hemicellulose of the present invention has a molecular weight greater than 20000.
A breathable film for paper diapers and a preparation method thereof comprise the following steps:
(1) according to the mass ratio of water to hemicellulose of 50-100: 1, stirring and dissolving at 50-70 ℃, and treating for 30-40 min to prepare hemicellulose hydrolysate;
(2) adding 0.3-0.6% by mass of chitosan into the hydrolysate obtained in the step 1), dissolving the chitosan, and adding 0.1-0.2% by mass of acetic acid solution for assisting dissolution;
(3) adding 0.4-1% by mass of plasticizer and 0.1-0.5% by mass of nano material into the solution prepared in the step 2), uniformly stirring, then adjusting the pH value to 5.0-7.0, and degassing;
(4) adding an emulsifier and a water repellent into the solution prepared in the step 3), heating to 60-80 ℃, uniformly stirring, and then preserving heat for 5-10 min at 60-80 ℃, wherein the addition amount of the emulsifier and the water repellent is 0.3-0.6% of the mass of the solution;
(5) adding a viscosity agent into the solution prepared in the step 4), stirring and dissolving the solution uniformly at the temperature of 60-80 ℃, and then preserving the heat for 5-10 min at the temperature of 50-60 ℃, wherein the addition amount of the viscosity agent is 0.01-0.1% of the mass of the solution;
(6) and (3) preparing the film from the solution prepared in the step 5), and forming and drying to obtain the breathable film of the paper diaper.
The breathable film prepared by the breathable film for the paper diaper and the preparation method thereof can be used for adult paper diapers and women sanitary napkins.
By adopting the technical scheme, the invention has the beneficial effects that:
(1) the basement membrane is made of natural polymer materials, and has the advantages of sanitation, no toxicity and skin friendliness.
(2) The breathable film disclosed by the invention has hydrophobicity, barrier property, air permeability and antibacterial property, has certain mechanical strength, and increases the comfort, safety and usability of the paper diaper.
(3) Thoroughly solves the problems of urine leakage and red and swollen buttocks when the baby wears the paper diaper.
Detailed Description
The invention will now be further illustrated with reference to specific examples. The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
A breathable film for paper diapers and a preparation method thereof comprise the following steps:
(1) according to the mass ratio of water to hemicellulose of 50: 1, stirring and dissolving at 50 ℃, and treating for 30min to obtain hemicellulose hydrolysate;
(2) adding 0.3 mass percent of chitosan into the hydrolysate obtained in the step 1) to dissolve the chitosan, and adding 0.1 mass percent of acetic acid solution to assist in dissolution;
(3) adding 0.4% by mass of plasticizer (glycerol and sorbitol in a mass ratio of 1:1) and 0.1% by mass of nano material (nano zinc oxide) into the solution prepared in the step 2), stirring uniformly, adjusting the pH value to 5.0 by using 0.2% NaOH solution, and degassing for 5 min;
(4) adding 0.3 percent of the mass of the emulsifier (glyceryl monostearate) solution and 0.4 percent of the mass of the water repellent (palmitic acid and stearic acid in a mass ratio of 1:1) solution into the solution prepared in the step 3), heating to 60 ℃, uniformly stirring, and then preserving heat for 10min at 60 ℃;
(5) adding a viscosity agent (hydroxypropyl methylcellulose (HPMC) and polyvinyl alcohol in a mass ratio of 1:1) into the solution prepared in the step 4), stirring and dissolving uniformly at 60 ℃, and then preserving heat at 50 ℃ for 5min, wherein the addition amount of the viscosity agent is 0.01% of the mass of the solution;
(6) and (3) preparing the film from the solution prepared in the step 5), and forming and drying to obtain the breathable film of the paper diaper.
The obtained paper diaper has a breathable film tensile strength of 45MPa, an elongation of 35%, a light transmittance of 76%, and a water vapor throughput of 20000 g/m2.24h。
Example 2
A breathable film for paper diapers and a preparation method thereof comprise the following steps:
(1) according to the mass ratio of water to hemicellulose of 100: 1, stirring and dissolving at 70 ℃, and treating for 40min to obtain hemicellulose hydrolysate;
(2) adding 0.6 mass percent of chitosan into the hydrolysate obtained in the step 1), dissolving the chitosan, and adding 0.2 mass percent of acetic acid solution for assisting in dissolving;
(3) adding 0.8% by mass of plasticizer (1, 2-propylene glycol) and 0.5% by mass of nano material (nano titanium dioxide) into the solution prepared in the step 2), stirring uniformly, then adjusting the pH value to 6.0 by using 0.2% NaOH solution, and degassing for 5 min;
(4) adding 0.6 percent of emulsifier (glyceryl monostearate and starch in a mass ratio of 1:1) and 0.6 percent of water repellent (lacquer wax) into the solution prepared in the step 3), heating to 80 ℃, uniformly stirring, and keeping the temperature at 80 ℃ for 5 min;
(5) adding a viscosity agent (polyvinyl alcohol) into the solution prepared in the step 4), stirring and dissolving uniformly at 80 ℃, and then preserving heat for 10min at 60 ℃, wherein the addition amount of the viscosity agent is 0.1% of the mass of the solution;
(6) and (3) preparing the film from the solution prepared in the step 5), and forming and drying to obtain the breathable film of the paper diaper.
The obtained paper diaper breathable film has tensile strength of 56MPa, elongation of 28%, light transmittance of 73%, and water vapor throughput of 21600 g/m2.24h。
Example 3
A breathable film for paper diapers and a preparation method thereof comprise the following steps:
(1) according to the mass ratio of water to hemicellulose of 80: 1, stirring and dissolving at 60 ℃, and treating for 30min to obtain hemicellulose hydrolysate;
(2) adding 0.5 mass percent of chitosan into the hydrolysate obtained in the step 1), dissolving the chitosan, and adding 0.2 mass percent of acetic acid solution for assisting in dissolving;
(3) adding 0.6% by mass of plasticizer (glycerol, 1, 2-propylene glycol, mass ratio is 2: 1) and 0.3% by mass of nano material (nano titanium dioxide) into the solution prepared in the step 2), stirring uniformly, then adjusting pH value to 7 by using 0.1% NaOH solution, and degassing for 5 min;
(4) adding 0.5 percent of the mass of the emulsifier (glyceryl monostearate) solution and 0.5 percent of the mass of the water repellent (palmitic acid, stearic acid and lacquer wax in a mass ratio of 1:2: 3) solution into the solution prepared in the step 3), heating to 70 ℃, uniformly stirring, and then preserving heat for 10min at 70 ℃;
(5) adding a viscosity agent (hydroxypropyl methylcellulose (HPMC)) into the solution prepared in the step 4), stirring at 70 ℃ to dissolve uniformly, and then keeping the temperature at 55 ℃ for 8min, wherein the addition amount of the viscosity agent is 0.05% of the mass of the solution;
(6) and (3) preparing the film from the solution prepared in the step 5), and forming and drying to obtain the breathable film of the paper diaper.
The obtained breathable film of the paper diaper has tensile strength of 52MPa, elongation of 30%, light transmittance of 76%, and water vapor throughput of 22000 g/m2.24h。
Example 4
A breathable film for paper diapers and a preparation method thereof comprise the following steps:
(1) according to the mass ratio of water to hemicellulose of 80: 1, stirring and dissolving at 60 ℃, and treating for 30min to obtain hemicellulose hydrolysate;
(2) adding 0.5 mass percent of chitosan into the hydrolysate obtained in the step 1), dissolving the chitosan, and adding 0.2 mass percent of acetic acid solution for assisting in dissolving;
(3) adding 0.6% by mass of plasticizer (glycerol, 1, 2-propylene glycol, mass ratio is 2: 1) and 0.3% by mass of nano material (nano titanium dioxide) into the solution prepared in the step 2), stirring uniformly, then adjusting pH value to 7 by using 0.1% NaOH solution, and degassing for 5 min;
(4) adding 0.5 percent of the mass of the emulsifier (glyceryl monostearate) solution and 0.5 percent of the mass of the water repellent (palmitic acid, stearic acid and lacquer wax in a mass ratio of 1:2: 3) solution into the solution prepared in the step 3), heating to 70 ℃, uniformly stirring, and then preserving heat for 10min at 70 ℃;
(5) adding a viscosity agent (hydroxypropyl methylcellulose (HPMC)) into the solution prepared in the step 4), stirring at 70 ℃ to dissolve uniformly, and then keeping the temperature at 55 ℃ for 8min, wherein the addition amount of the viscosity agent is 0.05% of the mass of the solution;
(6) and (3) directly coating the solution prepared in the step 5) on an absorption core layer of the paper diaper through a film coating machine, and forming and drying to obtain the paper diaper with the breathable film.
Claims (1)
1. A breathable film for paper diapers is characterized in that: the breathable film is a composite film material consisting of a natural high polymer material, a nano material, an emulsifier, a water repellent, a plasticizer and a viscosity agent;
the natural polymer material is chitosan and hemicellulose;
the nano material is nano titanium dioxide and nano zinc oxide;
the emulsifier is glyceryl monostearate or starch;
the water repellent is palmitic acid, stearic acid and lacquer wax;
the plasticizer is glycerol, sorbitol and 1, 2-propylene glycol;
the viscosity agent is hydroxypropyl methylcellulose (HPMC) and polyvinyl alcohol;
the molecular weight of the hemicellulose is more than 20000;
the preparation method of the breathable film of the paper diaper comprises the following steps:
(1) according to the mass ratio of water to hemicellulose of 50-100: 1, stirring and dissolving at 50-70 ℃, and treating for 30-40 min to prepare hemicellulose hydrolysate;
(2) adding 0.3-0.6% by mass of chitosan into the hydrolysate obtained in the step (1) to dissolve the chitosan, and adding 0.1-0.2% by mass of acetic acid solution to assist in dissolution;
(3) adding a plasticizer accounting for 0.4-1% of the mass of the solution prepared in the step (2) and a nano material accounting for 0.1-0.5% of the mass of the solution, uniformly stirring, adjusting the pH value to 5.0-7.0, and degassing;
(4) adding an emulsifier and a water repellent into the solution prepared in the step (3), heating to 60-80 ℃, uniformly stirring, and then preserving heat for 5-10 min at 60-80 ℃, wherein the addition amount of the emulsifier and the water repellent is 0.3-0.6% of the mass of the solution;
(5) adding a viscosity agent into the solution prepared in the step (4), stirring and dissolving the solution uniformly at the temperature of 60-80 ℃, and then preserving heat for 5-10 min at the temperature of 50-60 ℃, wherein the addition amount of the viscosity agent is 0.01-0.1% of the mass of the solution;
(6) and (5) preparing the solution prepared in the step (5) into a membrane, and forming and drying the membrane to obtain the breathable film of the paper diaper.
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Denomination of invention: A breathable membrane for diapers and its preparation method Granted publication date: 20210713 Pledgee: Shandong Linyi Luozhuang Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG AISHULE HYGIENE PRODUCTS Co.,Ltd. Registration number: Y2024980001814 |