CN117323118A - Tampon and method for making same - Google Patents
Tampon and method for making same Download PDFInfo
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- CN117323118A CN117323118A CN202311351243.5A CN202311351243A CN117323118A CN 117323118 A CN117323118 A CN 117323118A CN 202311351243 A CN202311351243 A CN 202311351243A CN 117323118 A CN117323118 A CN 117323118A
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- layer
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- fibers
- cotton
- strip
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- 238000000034 method Methods 0.000 title claims description 15
- 239000000835 fiber Substances 0.000 claims abstract description 165
- 229920000742 Cotton Polymers 0.000 claims abstract description 108
- 239000010410 layer Substances 0.000 claims abstract description 94
- 229920000297 Rayon Polymers 0.000 claims abstract description 61
- 239000003292 glue Substances 0.000 claims abstract description 32
- 229920000881 Modified starch Polymers 0.000 claims abstract description 28
- 239000004368 Modified starch Substances 0.000 claims abstract description 28
- 235000019426 modified starch Nutrition 0.000 claims abstract description 28
- 239000002356 single layer Substances 0.000 claims abstract description 22
- 238000009960 carding Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000006096 absorbing agent Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000000748 compression moulding Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 48
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 229920002472 Starch Polymers 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 102000011782 Keratins Human genes 0.000 claims description 11
- 108010076876 Keratins Proteins 0.000 claims description 11
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 11
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 11
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 11
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 11
- 210000002268 wool Anatomy 0.000 claims description 11
- 238000007598 dipping method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229940100445 wheat starch Drugs 0.000 claims description 9
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 2
- 239000008107 starch Substances 0.000 description 8
- 235000019698 starch Nutrition 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002788 crimping Methods 0.000 description 5
- 230000002175 menstrual effect Effects 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 125000003172 aldehyde group Chemical group 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000001215 vagina Anatomy 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000005906 menstruation Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 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
- A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
- A61F13/2082—Apparatus or processes of manufacturing
- A61F13/2085—Catamenial tampons
-
- 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
- A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
- A61F13/2002—Tampons, e.g. catamenial tampons; Accessories therefor characterised by the use
- A61F13/202—Catamenial tampons
-
- 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
- A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
- A61F13/2082—Apparatus or processes of manufacturing
- A61F13/2085—Catamenial tampons
- A61F13/2094—Catamenial tampons rolling a web material to form a tampon
Abstract
The invention discloses a sanitary cotton sliver and a preparation method thereof, comprising the following steps: s1, modifying viscose fibers; s2, mixing the modified viscose fibers with cotton fibers, carding, paving the mixture into single-layer fibers after carding, spraying modified starch glue solution on the single-layer fibers, covering a layer of single-layer fibers to obtain double-layer fibers, superposing the double-layer fibers to obtain a fiber web layer, wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into strip-shaped fiber layers; s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 10-20cm, then curling the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, and performing microwave heating treatment after compression molding in a former to obtain a cotton sliver body of the sanitary cotton sliver; s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured. The tampon does not have a problem in that the expulsion force becomes large due to the expansion of the tampon body due to the change of time.
Description
Technical Field
The invention belongs to the technical field of sanitary products, and particularly relates to a sanitary cotton sliver and a preparation method thereof.
Background
A tampon, consisting of fibers and comprising a cylinder of high water absorption, with cotton threads attached to the end. When a woman's menstruation comes from a tide, it can be put into the vagina to absorb menstrual blood. The built-in type sanitary cotton sliver is accepted and used by more and more people because the wearing and the movement are not affected when the sanitary cotton sliver is used, and the side leakage is not caused when the sanitary cotton sliver is absorbed fully. The convenience of the sanitary cotton strip meets the new demands of consumers, and compared with the sanitary towel, the sanitary cotton strip can be freely worn by women, does not suffer from side leakage and worry, is gradually accepted by domestic consumers, and is especially popular with young people. In the case of menstrual flow, the tampon can be placed in the vagina to absorb menstrual blood, and is of great interest because of its small size, comfort and non-feel in use, low leakage, and superior absorption.
Currently, there are two basic types of tampons used in feminine hygiene. The first type is a finger-insertable tampon, which is designed to be inserted directly by the user's finger. The second type is an applicator tampon, which is designed to be inserted with the aid of an applicator. Both types are typically prepared by folding or rolling a rectangular strip of loose, associated absorbent material into a blank and then compressing the blank into a cylindrical product known as a tampon body. The swab may or may not have an outer cover. In both types, the withdrawal string is attached to the tampon body, and the tampon is then wrapped and packaged for sale. In an applicator tampon, the tampon is assembled into the applicator prior to wrapping and packaging. The cotton sliver body mainly comprises W-shaped, fan-shaped and cylindrical shapes, and the raw materials mainly comprise viscose fibers, cotton fibers and the like.
Most tampons are currently manufactured in the following manner: a certain amount of cotton fibers, viscose fibers or a mixture of the cotton fibers and the viscose fibers is made into a strip shape through carding or carding without limitation, the strip shape is cut into pieces through slicing, then a pull rope is sewn for compression, and then the cotton fibers and the viscose fibers are packed into a catheter to form the sanitary cotton sliver. Because the cotton fiber and the viscose fiber are all cellulose fiber, internal stress exists between the fibers after compression, the internal stress can expand in the guide tube in the storage process, and the stability of the quality of the sanitary cotton sliver is greatly influenced, so that the push-out force of the cotton sliver is increased when the sanitary cotton sliver is used, and inconvenience is brought to a user.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a sanitary cotton sliver and a preparation method thereof, and the bonding agent is added into the fibers to connect cotton fibers and viscose fibers in a compressed cotton sliver body, so that the cotton sliver body is not easy to expand, and the problem that the push-out force is increased due to expansion of the cotton sliver body due to time change is solved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method of making a tampon comprising the steps of:
s1, modification of viscose fibers: adding viscose fibers to KMnO 4 /H 2 O 2 Soaking in water solution, washing and drying after soaking to obtain pretreated viscose fiber; adding the pretreated viscose fiber into wool keratin solution, and stirring for reaction to obtain modified viscose fiber after the reaction is completed;
s2, mixing the modified viscose fibers with cotton fibers, carding, paving the mixture into single-layer fibers after carding, spraying modified starch glue solution on the single-layer fibers, covering a layer of single-layer fibers to obtain double-layer fibers, superposing the double-layer fibers to obtain a fiber web layer, wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into strip-shaped fiber layers;
s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 10-20cm, then curling the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, and performing microwave heating treatment after compression molding in a former to obtain a cotton sliver body of the sanitary cotton sliver;
s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured.
Preferably, the KMnO in step S1 4 /H 2 O 2 KMnO in aqueous solution 4 The concentration of (C) is 10-20g/L, H 2 O 2 The concentration of (2) is 20-30g/L; the dipping temperature is 40-50 ℃ and the dipping time is 1-2h.
Preferably, the concentration of the wool keratin solution in the step S1 is 15-25g/L, the temperature of the stirring reaction is 70-80 ℃ and the time is 2-3h.
Preferably, the mass ratio of the modified viscose fiber to the cotton fiber in the step S2 is 30-40:60-70.
Preferably, the preparation method of the modified starch glue solution in the step S2 is as follows: adding wheat starch into deionized water, stirring uniformly, adding sodium hydroxide solution, heating to gelatinize, adding dilute hydrochloric acid to adjust pH to 6.5-7.5 after gelatinization, adding sodium carboxymethyl cellulose, sodium dodecyl sulfate and maleic anhydride, stirring to react, and cooling after reaction is completed to obtain modified starch glue solution.
Preferably, the mass ratio of the wheat starch to the deionized water to the sodium hydroxide solution to the sodium carboxymethyl cellulose to the sodium dodecyl sulfate to the maleic anhydride is 80-90:600:50-80:10-20:2-3:8-10; the mass concentration of the sodium hydroxide solution is 5%.
Preferably, the temperature of the gelatinization reaction is 70-80 ℃ and the time is 2-3h; the temperature of the stirring reaction is 75-85 ℃ and the time is 1-2h.
Preferably, the grammage of the web layer in step S2 is 300-900g/m 2 The spraying amount of the modified starch glue solution is 1.5-3.5g/m 2 。
Preferably, the pressure of the compression molding in the step S3 is 4-8MPa; the microwave treatment temperature is 40-60 deg.c and the microwave treatment time is 1-10s.
The invention also provides a tampon prepared by the method.
Compared with the prior art, the invention has the following beneficial effects:
(1) The cotton sliver provided by the invention is characterized in that viscose fibers are modified, then blended with cotton fibers and carded to obtain a fiber web, modified starch glue solution is sprayed on the fiber web, the fiber web is pressed after being overlapped into strip-shaped fiber layers, and the strip-shaped fiber layers are curled, pressed and subjected to microwave heat treatment to obtain a cotton sliver body; because the glue solution is added, the glue solution has better viscosity under the dry state, so that the viscose fibers and the cotton fibers are firmly combined, the problem that the push-out force is increased due to fiber expansion is prevented, the quality stability of the cotton sliver is improved, when the cotton sliver is placed in a body to absorb menstrual blood, the adhesive property of the glue solution is rapidly reduced after water is encountered, and the cotton core can be expanded to fully absorb the menstrual blood, so that the absorption capacity of the cotton sliver is not influenced.
(2) According to the sanitary cotton sliver provided by the invention, the viscose fiber is subjected to oxidation treatment, the alcohol hydroxyl groups on the surface of the treated viscose fiber are oxidized into aldehyde groups and partial carboxyl groups, the aldehyde groups and the carboxyl groups can react with amino groups on wool keratin, so that the protein is grafted to the surface of the viscose fiber, the wool keratin is natural protein, is harmless to human skin and is skin-friendly, and the viscose fiber has better softness, skin-friendly property and hygroscopicity, so that the touch feeling and quality of a product are improved; more importantly, protein on the surface of the viscose fiber can be combined with starch in the glue solution in the hot pressing process, so that the adhesive property between the adhesive and the cotton fiber is rapidly reduced after the glue solution in the cotton sliver meets water, the viscosity between the adhesive and the viscose fiber is not reduced, namely the absorption capacity of the cotton sliver is not influenced, and the glue solution is not fallen off from the cotton sliver and remains in the body.
(3) According to the sanitary cotton sliver provided by the invention, the prepared modified starch glue is prepared from natural environment-friendly materials, is nontoxic and harmless to human bodies, and is prepared by pasting wheat starch under alkaline conditions to destroy the granular structure of the starch, so that the granules are moist and swelled, water molecules can enter the starch granules easily, and the reaction efficiency of the starch and maleic anhydride is improved; meanwhile, the sodium carboxymethyl cellulose can be used as a thickening agent and a stabilizing agent, so that the starch glue is not easy to mildew, and the structure of the sodium carboxymethyl cellulose contains a large number of hydroxyl groups, so that the sodium carboxymethyl cellulose can be combined with the hydroxyl groups in starch molecules to form hydrogen bonds, the viscosity of the modified starch glue solution in a dry state is enhanced, and the stability of the cotton sliver in the storage process is ensured.
Drawings
Fig. 1 is a physical diagram of a cotton sliver prepared in example 1 of the present invention;
fig. 2 is a physical diagram of a cotton sliver prepared in comparative example 1 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The wool keratin is purchased from the biological technology company of Fu Bunt, shaanxi.
Example 1
A method of making a tampon comprising the steps of:
s1, modification of viscose fibers: 50g of viscose was added to 500mL KMnO 4 /H 2 O 2 Aqueous solution (KMnO) 4 Is 15g/L, H 2 O 2 The concentration of (2) is 25 g/L), dipping for 1.5h at 45 ℃, washing and drying after the dipping is finished, and obtaining the pretreated viscose fiber; adding 50g of pretreated viscose fiber into 500mL of wool keratin solution with the concentration of 20g/L, stirring and reacting for 2.5h at the temperature of 75 ℃, filtering and drying after the reaction is finished to obtain modified viscose fiber;
s2, mixing the modified viscose fiber and the cotton fiber, carding, and then laying and overlapping the single-layer fiber after carding is finished, wherein the mass ratio of the modified viscose fiber to the cotton fiber is 35:65, and the single-layer fiber is sprayed with the modified starch glue solution with the spraying amount of 2.5g/m 2 Then a layer of single-layer fiber is covered to obtain double-layer fiber, and 8 layers of double-layer fiber are overlapped to obtain a fiber net layer, wherein the gram weight of the fiber net layer is 500g/m 2 Wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into a strip-shaped fiber layer;
s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 15cm, then crimping the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, pressing and forming in a forming device, wherein the pressure is 6MPa, and then carrying out microwave heating treatment at the temperature of 50 ℃ for 5S to obtain a cotton sliver body of the sanitary cotton sliver;
s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured.
The preparation method of the modified starch glue solution in the step S2 comprises the following steps: adding 85g of wheat starch into 600g of deionized water, uniformly stirring, adding 8g of 5% sodium hydroxide solution, gelatinizing for 2.5h at 75 ℃, adding 5% diluted hydrochloric acid to adjust pH to 7 after gelatinization, adding 15g of sodium carboxymethyl cellulose, 2.5g of sodium dodecyl sulfate and 9g of maleic anhydride, stirring at 80 ℃ for reacting for 1.5h, and cooling after the reaction is completed, thus obtaining the modified starch glue solution.
Example 2
A method of making a tampon comprising the steps of:
s1, modification of viscose fibers: 50g of viscose was added to 500mL KMnO 4 /H 2 O 2 Aqueous solution (KMnO) 4 Is 10g/L, H 2 O 2 30 g/L), soaking for 2 hours at 40 ℃, washing and drying after soaking to obtain the pretreated viscose fiber; adding 50g of pretreated viscose fiber into 500mL of wool keratin solution with the concentration of 15g/L, stirring and reacting for 3 hours at 70 ℃, filtering and drying after the reaction is finished to obtain modified viscose fiber;
s2, mixing the modified viscose fiber with cotton fiber, carding, and laying up a single-layer fiber after carding is finished, wherein the modified viscose fiber and the cotton fiber are mixed according to the mass ratio of 30:70, and the spraying amount of the modified starch glue solution is 1.5g/m 2 Then a layer of single-layer fiber is covered to obtain double-layer fiber, and 8 layers of double-layer fiber are overlapped to obtain a fiber net layer, wherein the gram weight of the fiber net layer is 500g/m 2 Wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into a strip-shaped fiber layer;
s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer for 15cm, then crimping the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, pressing and forming in a forming device, wherein the pressure is 8MPa, and then carrying out microwave heating treatment at the temperature of 40 ℃ for 10S to obtain a cotton sliver body of the sanitary cotton sliver;
s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured.
The preparation method of the modified starch glue solution in the step S2 comprises the following steps: adding 80g of wheat starch into 600g of deionized water, uniformly stirring, adding 5g of 5% sodium hydroxide solution, gelatinizing for 3 hours at 70 ℃, adding 5% diluted hydrochloric acid to adjust the pH to 6.5 after gelatinization, adding 20g of sodium carboxymethyl cellulose, 2g of sodium dodecyl sulfate and 8g of maleic anhydride, stirring and reacting for 2 hours at 75 ℃, and cooling after the reaction is finished to obtain the modified starch glue solution.
Example 3
A method of making a tampon comprising the steps of:
s1, modification of viscose fibers: 50g of viscose was added to 500mL KMnO 4 /H 2 O 2 Aqueous solution (KMnO) 4 Is 20g/L, H 2 O 2 The concentration of (2) is 20 g/L), dipping for 1h at 50 ℃, washing and drying after the dipping is finished, and obtaining the pretreated viscose fiber; adding 50g of pretreated viscose fiber into 500mL of wool keratin solution with the concentration of 25g/L, stirring at 80 ℃ for reaction for 2 hours, filtering and drying after the reaction is finished to obtain modified viscose fiber;
s2, mixing the modified viscose fiber with cotton fiber, carding, and laying up a single-layer fiber after carding is finished, wherein the modified viscose fiber and the cotton fiber are mixed according to the mass ratio of 40:60, and the spraying amount of the modified starch glue solution is 3.5g/m 2 Then a layer of single-layer fiber is covered to obtain double-layer fiber, and 8 layers of double-layer fiber are overlapped to obtain a fiber net layer, wherein the gram weight of the fiber net layer is 500g/m 2 Wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into a strip-shaped fiber layer;
s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 15cm, then crimping the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, pressing and forming in a forming device, wherein the pressure is 4MPa, and then carrying out microwave heating treatment at the temperature of 60 ℃ for 3S to obtain a cotton sliver body of the sanitary cotton sliver;
s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured.
The preparation method of the modified starch glue solution in the step S2 comprises the following steps: adding 90g of wheat starch into 600g of deionized water, uniformly stirring, adding 10g of 5% sodium hydroxide solution, gelatinizing for 2 hours at 80 ℃, adding 5% diluted hydrochloric acid to adjust the pH to 7.5 after gelatinization, adding 10g of sodium carboxymethyl cellulose, 3g of sodium dodecyl sulfate and 10g of maleic anhydride, stirring and reacting for 1 hour at 85 ℃, and cooling after the reaction is finished to obtain the modified starch glue solution.
Comparative example 1
A method of making a tampon comprising the steps of:
s1, modification of viscose fibers: 50g of viscose was added to 500mL KMnO 4 /H 2 O 2 Aqueous solution (KMnO) 4 Is 15g/L, H 2 O 2 The concentration of (2) is 25 g/L), dipping for 1.5h at 45 ℃, washing and drying after the dipping is finished, and obtaining the pretreated viscose fiber; adding 50g of pretreated viscose fiber into 500mL of wool keratin solution with the concentration of 20g/L, stirring and reacting for 2.5h at the temperature of 75 ℃, filtering and drying after the reaction is finished to obtain modified viscose fiber;
s2, mixing the modified viscose fiber and the cotton fiber, carding, and then laying and stacking the mixture into a single-layer fiber, wherein the mass ratio of the modified viscose fiber to the cotton fiber is 35:65, covering a layer of single-layer fiber on the single-layer fiber to obtain a double-layer fiber, and stacking 8 layers of double-layer fiber to obtain a fiber web layer, wherein the gram weight of the fiber web layer is 500g/m 2 Wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into a strip-shaped fiber layer;
s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 15cm, then crimping the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, pressing and forming in a forming device, wherein the pressure is 6MPa, and then carrying out microwave heating treatment at the temperature of 50 ℃ for 5S to obtain a cotton sliver body of the sanitary cotton sliver;
s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured.
This comparative example is compared to the examples without spraying the modified starch gum.
Comparative example 2
A method of making a tampon comprising the steps of:
s1, mixing viscose fiber and cotton fiber, carding, and paving to form a single-layer fiber after carding, wherein the mass ratio of the viscose fiber to the cotton fiber is 35:65, and spraying modified starch glue solution on the single-layer fiber with the spraying amount of 2.5g/m 2 Then a layer of single-layer fiber is covered to obtain double-layer fiber, and 8 layers of double-layer fiber are overlapped to obtain a fiber net layer, wherein the gram weight of the fiber net layer is 500g/m 2 Wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into a strip-shaped fiber layer;
s2, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 15cm, then crimping the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, pressing and forming in a forming device, wherein the pressure is 6MPa, and then carrying out microwave heating treatment at the temperature of 50 ℃ for 5S to obtain a cotton sliver body of the sanitary cotton sliver;
s3, the cotton sliver body is filled into the guide tube to manufacture the cotton sliver.
The preparation method of the modified starch glue solution in the step S2 comprises the following steps: adding 85g of wheat starch into 600g of deionized water, uniformly stirring, adding 8g of 5% sodium hydroxide solution, gelatinizing for 2.5h at 75 ℃, adding 5% diluted hydrochloric acid to adjust pH to 7 after gelatinization, adding 15g of sodium carboxymethyl cellulose, 2.5g of sodium dodecyl sulfate and 9g of maleic anhydride, stirring at 80 ℃ for reacting for 1.5h, and cooling after the reaction is completed, thus obtaining the modified starch glue solution.
The comparative example is compared to example 1, without modification of the viscose fibres.
The tampons prepared in examples 1-3 and comparative examples 1-2 were randomly extracted, 20 in each group, tested for any 10 push-out forces after production was completed, the push-out force average was calculated, the remaining 10 were left to stand at room temperature for 6 months, the push-out force average was tested, and the absorbent capacity was tested, with the test results as shown in table 1 below:
TABLE 1
As can be seen from fig. 1 to 2, the cotton sliver prepared by the present invention has good stability without cracks due to fiber expansion in appearance after being left for 6 months.
As can be seen from Table 1, the push-out force of the cotton sliver prepared by the method is basically unchanged during storage, and the absorption amount of the cotton sliver is not greatly different from that of the cotton sliver prepared without modified starch glue, which indicates that the absorption amount of the cotton sliver is not influenced by the addition of modified starch glue.
The tampons prepared in examples 1-3 were immersed in water for 4 hours, and then tested for starch content in water, none of which detected starch residues, indicating that the modified starch gum in the tampons prepared according to the present invention would not fall off the tampons.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method of making a tampon comprising the steps of:
s1, modification of viscose fibers: adding viscose fibers to KMnO 4 /H 2 O 2 Soaking in water solution, washing and drying after soaking to obtain pretreated viscose fiber; adding the pretreated viscose fiber into wool keratin solution, and stirring for reaction to obtain modified viscose fiber after the reaction is completed;
s2, mixing the modified viscose fibers with cotton fibers, carding, paving the mixture into single-layer fibers after carding, spraying modified starch glue solution on the single-layer fibers, covering a layer of single-layer fibers to obtain double-layer fibers, superposing the double-layer fibers to obtain a fiber web layer, wrapping the fiber web layer by using non-woven fabrics, and pressing the fiber web layer into strip-shaped fiber layers;
s3, fixing cotton threads on the central part of the strip-shaped fiber layer, exposing the tail ends of the cotton threads outside the strip-shaped fiber layer by 10-20cm, then curling the strip-shaped fiber layer to form a strip-shaped cylindrical absorber, and performing microwave heating treatment after compression molding in a former to obtain a cotton sliver body of the sanitary cotton sliver;
s4, the cotton sliver body is filled into the catheter, and the cotton sliver is manufactured.
2. The method according to claim 1, wherein KMnO is used in step S1 4 /H 2 O 2 KMnO in aqueous solution 4 The concentration of (C) is 10-20g/L, H 2 O 2 The concentration of (2) is 20-30g/L; the dipping temperature is 40-50 ℃ and the dipping time is 1-2h.
3. The method according to claim 1, wherein the concentration of the wool keratin solution in the step S1 is 15-25g/L, and the temperature of the stirring reaction is 70-80 ℃ for 2-3 hours.
4. The method according to claim 1, wherein the mass ratio of the modified viscose fiber to the cotton fiber in the step S2 is 30-40:60-70.
5. The method according to claim 1, wherein the modified starch gum in step S2 is prepared by: adding wheat starch into deionized water, stirring uniformly, adding sodium hydroxide solution, heating to gelatinize, adding dilute hydrochloric acid to adjust pH to 6.5-7.5 after gelatinization, adding sodium carboxymethyl cellulose, sodium dodecyl sulfate and maleic anhydride, stirring to react, and cooling after reaction is completed to obtain modified starch glue solution.
6. The preparation method according to claim 5, wherein the mass ratio of the wheat starch, the deionized water, the sodium hydroxide solution, the sodium carboxymethyl cellulose, the sodium dodecyl sulfate and the maleic anhydride is 80-90:600:50-80:10-20:2-3:8-10; the mass concentration of the sodium hydroxide solution is 5%.
7. The method according to claim 5, wherein the temperature of the gelatinization reaction is 70-80 ℃ for 2-3 hours; the temperature of the stirring reaction is 75-85 ℃ and the time is 1-2h.
8. The method of claim 1, wherein the grammage of the web layer in step S2 is 300-900g/m 2 The spraying amount of the modified starch glue solution is 1.5-3.5g/m 2 。
9. The method according to claim 1, wherein the pressure of the press molding in step S3 is 4 to 8MPa; the temperature of the microwave heating treatment is 40-60 ℃ and the time is 1-10s.
10. A tampon made according to the method of any of claims 1-9.
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