CN104096258B - Degradable poly lactic acid sanitary towel of a kind of lateral leakage protection and preparation method thereof - Google Patents
Degradable poly lactic acid sanitary towel of a kind of lateral leakage protection and preparation method thereof Download PDFInfo
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- CN104096258B CN104096258B CN201410269918.6A CN201410269918A CN104096258B CN 104096258 B CN104096258 B CN 104096258B CN 201410269918 A CN201410269918 A CN 201410269918A CN 104096258 B CN104096258 B CN 104096258B
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- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 53
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims description 24
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 109
- 239000000835 fiber Substances 0.000 claims abstract description 48
- 239000002253 acid Substances 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 10
- 229920002678 cellulose Polymers 0.000 claims abstract description 5
- 239000001913 cellulose Substances 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 14
- 238000007731 hot pressing Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- 239000012943 hotmelt Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000002940 repellent Effects 0.000 claims description 10
- 239000005871 repellent Substances 0.000 claims description 10
- 229920000520 poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Polymers 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000004831 Hot glue Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 239000002216 antistatic agent Substances 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 abstract description 4
- 235000014655 lactic acid Nutrition 0.000 abstract description 2
- 239000004310 lactic acid Substances 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 238000009987 spinning Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 15
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 230000003115 biocidal effect Effects 0.000 description 4
- 210000004914 menses Anatomy 0.000 description 4
- 229920002521 macromolecule Polymers 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003821 menstrual periods Effects 0.000 description 2
- 229920006381 polylactic acid film Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 241000222122 Candida albicans Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
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- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 229940095731 candida albicans Drugs 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- 230000005180 public health Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Absorbent Articles And Supports Therefor (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The present invention proposes a kind of sanitary towel of lateral leakage protection, comprise the top layer non-woven fabrics and bottom antiseepage film that arrange from inside to outside, described top layer non-woven fabrics is three chip architectures, the top layer non-woven fabrics of intermediate and the top layer non-woven fabrics of both wings bond together, and have by the coated wood pulp cellulose absorptive core of toilet paper at intermediate top layer non-woven fabrics and bottom antiseepage film central filler.The sanitary towel that the present invention proposes, top layer is made up of 100% acid fiber by polylactic or PLA/PBHV fiber hot-wind nonwoven cloth, acid fiber by polylactic remains primary characteristic, do not cause any damage, due to polylactic acid be by lactic acid molecules be monomer polymerization then spinning form, likely there is the shorter polylactic acid molecule of strand at fiber surface, make the pH value of polylactic acid nonwoven surface present faintly acid, consistent with the pH value of human body skin, provide the function that eliminates the unusual smell simultaneously; Grammes per square metre and the thickness of the two-piece type non-woven fabrics of side are all large than intermediate, can not produce side leakage.
Description
Technical field
The invention belongs to hygiology field, be specifically related to a kind of sanitary towel of lateral leakage protection.
Background technology
Have statistics to show, the current women worldwide size of population about 3,500,000,000 people, nearly 2,000,000,000 women need to use sanitary towel.From single women, a women will experience 60 days menstrual phases for 1 year, within 1 year, approximately need 480 sanitary towels, calculate according to a slice sanitary towel weight 10 grams, thus 2,000,000,000 women will produce the rubbish of about 9,600,000 tons for 1 year, the volume ratio of occupying due to these " white garbages " is larger, carry out landfill disposal according to existing processing method to need to consume a large amount of landfill yards, occur seizing good farmland, arable land with the mankind, corrode the serious problems of human habitat, thus, produce and use degradable napkin, change material therefor in existing product, after making it to abandon and being buried in underground, degraded can be produced through the regular hour, return the living environment of mankind's green, very necessary.
The degraded sanitary towel related in existing patent mainly contains:
Chinese patent CN200520143315.8 report a kind of can the sanitary belt of whole degradation treatment, be made up of degraded wood pulp paper, degradation water prick nonwoven cloth, degradation water prick nonwoven cloth to be positioned on degraded wood pulp paper and with degraded waterproof wood pulp paper compound, degradation water prick nonwoven cloth is made up of cotton fiber.
Chinese patent CN200810004422.0 discloses a kind of corn polylactic acid fiber sanitary napkin, is made up of, this product fully biodegradable acid fiber by polylactic spun-laced nonwoven fabric, braiding absorbent core layer and counterdie.
Chinese patent CN201220038641.2 discloses a kind of natural complete biodegradable woman's sanitarg mapkin, comprise hydrophilic layer, guide layer, dust-free paper and water suction macromolecule mixed layer, waterproof counterdie and strippable paper, hydrophilic layer is positioned at upper surface, guide layer to be located under hydrophilic layer and to be positioned on dust-free paper and water suction macromolecule mixed layer, and dust-free paper mixes with the macromolecule that absorbs water.
As can be seen from above-mentioned data, in existing degraded sanitary towel or sanitary pad, there is complex manufacturing, be difficult to realize sanitary towel's water absorbent rate of national Specification and must be greater than the standard of 7 times and the feature of function singleness, thus the market faced by is narrow with use colony, and popularization and application is subject to certain restrictions.
Summary of the invention
For the weak point of this area, the object of the invention is the degradable poly lactic acid sanitary towel proposing a kind of lateral leakage protection.
Another object of the present invention is the preparation method proposing a kind of sanitary towel.
Realizing above-mentioned purpose technical scheme of the present invention is:
A degradable poly lactic acid sanitary towel for lateral leakage protection, comprises the top layer non-woven fabrics and bottom antiseepage film that arrange from inside to outside,
Described top layer non-woven fabrics is three chip architectures, and the top layer non-woven fabrics of intermediate and the top layer non-woven fabrics of both wings bond together, and described top layer non-woven fabrics is acid fiber by polylactic non-woven fabrics or polylactic acid/PHBV fabric nonwoven cloth; Have by the coated wood pulp cellulose absorptive core of toilet paper at intermediate top layer non-woven fabrics and bottom antiseepage film central filler.
" interior " of described sanitary towel, refers to the one side with Body contact.
Preferably, the top layer nonwoven thickness of described intermediate is 0.08-0.18mm; The top layer nonwoven thickness of described both wings is 0.15-0.20mm.
Wherein, described bottom antiseepage film is one or both in the counterdie of the counterdie of PLA film, PHA film, PBS film or PLA/PHA intermingling material, PLA/PBS intermingling material, thickness 25-45 μm.Described base film material can be buied by market.
The preparation method of sanitary towel of the present invention, is characterized in that, comprises step:
1) top layer nonwoven production:
Acid fiber by polylactic or polylactic acid/PHBV fiber spray antistatic agent treatment, then shredding, mixing, combing, directly becomes net, hot melt to reinforce, and obtains acid fiber by polylactic non-woven fabrics skin-material;
2) water nonwoven production is refused on top layer:
Step 1) debatching of gained hot melt acid fiber by polylactic non-woven fabrics, then pad organosilicon water repellent, preliminary drying, to bake, obtain acid fiber by polylactic and refuse water non-woven fabrics skin-material;
3) degradable napkin is produced:
Time of Fluff Slurry is pulverized, toilet paper input frictioning, wood pulp are coated, compacting, then will divide and be cut to intermediate core body; Intermediate top layer non-woven fabrics input frictioning, the input of water non-woven fabrics and intermediate top layer non-woven fabrics hot pressing compound are refused in both sides, the coated middle core body of counterdie, surface layer non-woven fabrics, compound rolling, subsides release paper, obtained sanitary towel finished product.
Further, described step 1) combing is: adopt roller and clearer card to carry out combing, wherein cylinder speed is adjusted to 1100-1200 m/min, working roll speed is 70-80 m/min, and upper angle stripper speed is 30-40 m/min, lower angle stripper speed is 40-51 m/min, upper Condensing Roller speed 58-72.5 m/min, lower Condensing Roller speed 45-65 m/min, upper doffer speed is 72-84 m/min, lower doffer speed is 70-82 m/min, and speed of production is 50-60 m/min.
Wherein, described step 1) hot melt reinforces and is: adopts two-period form baking oven to carry out hot melt reinforcing, controls oven temperature and be respectively 80-90 DEG C, 110-130 DEG C.
Wherein, described step 2) pad organosilicon water repellent and be:
Water treatment is refused to for the acid fiber by polylactic of both wings or polylactic acid/PHBV fabric nonwoven cloth, adopt organosilicon water repellent, consumption is 3-6%, adopt the method that a leaching one is rolled, then carry out preliminary drying with two-period form baking oven and bake, control operation condition is respectively preliminary drying temperature 100-110 DEG C, time 1-3 minute; Baking temperature 120-140 DEG C, the time is 2-4 minute, and speed of production is 70-80 m/min.
Wherein, described step 3) both sides refuse the input of water non-woven fabrics and are complex as with the non-woven fabrics hot pressing of intermediate top layer: the non-woven fabrics that the process of intermediate non-woven fabrics and both wings refuses water treatment is combined with each other by PUR, the water non-woven fabrics of refusing of both wings is positioned at above the non-woven fabrics of intermediate top layer, and local is overlapping.
Further, top layer non-woven fabrics and intermediate absorption core body, bottom antiseepage film and intermediate absorption core body are combined with each other by PUR, top layer non-woven fabrics and antiseepage counterdie are combined with each other by PUR and hot pressing, hot pressing combined temp is 120-140 DEG C, described PUR is low-temperature hot melt adhesive, and gluing temperature is 140-150 DEG C.
Beneficial effect of the present invention is:
1) in the present invention, sanitary towel top layer is made up of 100% acid fiber by polylactic or PLA/PBHV fiber hot-wind nonwoven cloth, by the pretreatment of resistant fiber electrostatic, shredding, mixing, combing and hot melt reinforce the good control of key point in processing method, acid fiber by polylactic is made to remain primary characteristic, do not cause any damage, due to polylactic acid be by lactic acid molecules be monomer polymerization then spinning form, the shorter polylactic acid molecule of strand is likely there is at fiber surface, the pH value of polylactic acid nonwoven surface is made to present faintly acid, consistent with the pH value of human body skin, the slightly acidic environment of protectiveness can be provided to female menstrual period, consistent bacterial growth, there is provided the function that eliminates the unusual smell simultaneously,
2) acid fiber by polylactic performance is close to polyster fibre, there is good stretching property by force, but hygroscopicity is poor, regain is only 0.4%, but the performance that acid fiber by polylactic is different from polyster fibre is that its wet guilding is good, thus used as the intermediate ((1) see in Fig. 1) of three-chip type top layer non-woven fabrics, can rapidly by menses fast guiding to intermediate absorption sandwich layer, keep cloth cover dry-ness, for female menstrual period provides dry and comfortable and clean environment due to its poor hygroscopicity simultaneously;
3) in the non-woven fabrics of polylactic acid top layer, grammes per square metre and the thickness of two-piece type ((2) see in Fig. 1) non-woven fabrics of side are all large than intermediate, for the trickling of menses side direction provides a good barrier, the non-woven fabrics of this side have passed through organosilicon and refuses water treatment simultaneously, while stoping side non-woven fabrics to absorb menses further, non-woven fabrics is made to obtain soft and smooth feel, make menses in dirty process, due to be subject to side refuse water non-woven fabrics obstruct and directly under be seeped in absorbed layer, side leakage can not be produced;
4) the intermediate absorption sandwich layer of sanitary towel of the present invention is starched by the coated wooden floss of toilet paper and is formed, and raw material all comes from the wood pulp cellulose of 100%, thus can reach 100% degraded, and simultaneously stability multiplying power can reach the standard of GB GB/T8939-2008 completely;
5) counterdie of sanitary towel of the present invention have employed PLA, PLA/PHA, PLA/PBS film, has good spendable mechanical property and pliability, has good breathability simultaneously, add the comfortableness of degradable napkin of the present invention; Adopt low-temperature hot melt adhesive and intermediate absorption core body and top layer polylactic acid non-woven fabrics to carry out compound simultaneously, can not any performance of loss PLA film.
In a word, sanitary towel provided by the invention not only effectively can prevent side leakage, and possess antibacterial, eliminate the unusual smell, moisture absorption is breathed freely, soft comfortable and can be degradable feature, it is the desirable substitution material of existing sanitary towel, can not degrade and can't bear the heavy load of bringing to environment to solve existing hygienic material further, because of but a kind of sanitary towel with brand-new environmental protection and function theory, there is extraordinary market prospect.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of sanitary towel of the present invention.
In figure, 1 is the top layer non-woven fabrics of intermediate, and 2 is the top layer non-woven fabrics of both wings.
Fig. 2 is sanitary towel's flow sheet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
Acid fiber by polylactic, producer bought by PLA/PHBV fiber is Maanshan Tongjieliang Biomaterials Co., Ltd.; Antistatic additive: to stand upright Chemical Co., Ltd. purchased from Hangzhou, model is ZL-551; Organosilicon water repellent: purchased from the agent of Jiaxing Hua Sheng Auxiliaries Industry company, model is SG-5; PLA, PLA/PHA, PLA/PBS film is provided by Maanshan Tongjieliang Biomaterials Co., Ltd..
In the following description of the present invention, if no special instructions, the means used are the technological means of this area routine.
Embodiment 1
As Fig. 1, the sanitary towel of a kind of lateral leakage protection that the present invention proposes, comprise the top layer non-woven fabrics and bottom antiseepage film that arrange from inside to outside, described top layer non-woven fabrics is three chip architectures, the top layer non-woven fabrics 1 of intermediate bonds together with the top layer non-woven fabrics 2 of both wings, and described top layer non-woven fabrics is acid fiber by polylactic non-woven fabrics; Have by the coated wood pulp cellulose absorptive core of toilet paper at intermediate top layer non-woven fabrics and bottom antiseepage film central filler.
Wherein, top layer non-woven fabrics 1 thickness of intermediate is 0.08mm.Top layer non-woven fabrics 2 thickness of both wings is 0.15mm.Bottom antiseepage film is PLA/PHA film, thickness 25 μm.
This sanitary towel's preparation process is:
1) polylactic acid top layer non-woven fabrics preparation:
Select PLA/PHA antiseepage counterdie, weight is 20g/m
2, thickness 25 μm; Select 100% acid fiber by polylactic length 38mm, fineness is the acid fiber by polylactic of 1.67dtex, reinforce through antistatic pretreatment, shredding, mixing, combing and hot melt and make top layer non-woven fabrics, wherein: first spray the antistatic additive of 2%, controlling fibre moisture regain rate and reach 5%; Secondly the fiber when combing, attentional manipulation roller and clearer card (Changzhou Jin Yi Machinery Co., Ltd., model: ASBG215) combing speed, to alleviate the damage to acid fiber by polylactic, cylinder speed is adjusted to 1200 ms/min, working roll speed is 80 ms/min, upper angle stripper speed is 40 ms/min, lower angle stripper speed is 51 ms/min, upper Condensing Roller speed 72.5 ms/min, lower Condensing Roller speed 65 ms/min, upper doffer speed is 84 ms/min, lower doffer speed is 82 ms/min, and speed of production is 60 ms/min; Adopt two-period form baking oven, control oven temperature and be respectively 80 DEG C, 110 DEG C, obtained polylactic acid non-woven fabrics grammes per square metre is 15g/m
2, thickness is 0.08mm.
2) preparation of water non-woven fabrics is refused on top layer:
Adopt above-mentioned steps 1) same process, increase the cotton feeding amount of machine, preparing polylactic acid non-woven fabrics grammes per square metre is 22g/m
2(parameter setting is good, and roller and clearer card adjusts automatically), thickness is 0.15mm; Adopt organosilicon water repellent to process, consumption is 3%, and after a leaching one is rolled, preliminary drying temperature is 100 DEG C, baking temperature is 120 DEG C, and speed is 80 ms/min, controls preliminary drying time 2 minutes; The time of baking is 3 minutes.
3) preparation of sanitary towel
Flow process is as Fig. 2.Intermediate non-woven fabrics and both sides are combined with each other by PUR through the non-woven fabrics refusing water treatment, make both sides refuse water non-woven fabrics and push down above intermediate non-woven fabrics, (the Ge Youyi overlapping region, top layer non-woven fabrics 1 both sides of intermediate); Top layer non-woven fabrics and intermediate absorption core body, bottom antiseepage film and intermediate absorption core body are combined with each other by PUR, top layer non-woven fabrics and antiseepage counterdie are combined with each other by PUR and hot pressing, hot pressing combined temp is 120 DEG C, and low-temperature hot melt adhesive tack temperature is 140 DEG C.
Embodiment 2
1) polylactic acid top layer non-woven fabrics preparation:
Select PLA antiseepage counterdie, weight is 40g/m
2, thickness 45 μm; Select 100% acid fiber by polylactic length 51mm, fineness is the acid fiber by polylactic of 13.3dtex, reinforce through antistatic pretreatment, shredding, mixing, combing and hot melt and make top layer non-woven fabrics, wherein: first spray the antistatic additive of 4%, controlling fibre moisture regain rate and reach 8%; Secondly the fiber when combing, the combing speed of attentional manipulation roller and clearer card, to alleviate the damage to acid fiber by polylactic, is adjusted to 1100 ms/min by cylinder speed, working roll speed is 70 ms/min, upper angle stripper speed is 30 ms/min, and lower angle stripper speed is 40 ms/min, upper Condensing Roller speed 58 ms/min, lower Condensing Roller speed 45 ms/min, upper doffer speed is 72 ms/min, and lower doffer speed is 70 ms/min, and speed of production is 60 ms/min; Again adopt two-period form baking oven, control oven temperature and be respectively 90 DEG C, 130 DEG C, obtained polylactic acid non-woven fabrics grammes per square metre is 18g/m
2, thickness is 0.18mm.
2) preparation of water non-woven fabrics is refused on top layer:
Adopting above-mentioned 1) to prepare polylactic acid non-woven fabrics grammes per square metre be 28g/m to method
2, thickness is 0.12mm; Adopt organosilicon water repellent to process, consumption is 6%, and after a leaching one is rolled, preliminary drying temperature is 110 DEG C, baking temperature is 140 DEG C, and speed is 70 ms/min.Control preliminary drying time 2 minutes; The time of baking is 4 minutes.
3) preparation of sanitary towel
Intermediate non-woven fabrics and both sides are combined with each other by PUR through the non-woven fabrics refusing water treatment, make both sides refuse water non-woven fabrics and be positioned at above intermediate non-woven fabrics; Top layer non-woven fabrics and intermediate absorption core body, bottom antiseepage film and intermediate absorption core body are combined with each other by PUR, top layer non-woven fabrics and antiseepage counterdie are combined with each other by PUR and hot pressing, hot pressing combined temp is 140 DEG C, and the gluing temperature of low-temperature heat melting is 150 DEG C.
Embodiment 3:
1) polylactic acid top layer non-woven fabrics preparation:
Select PLA/PBS antiseepage counterdie, weight is 30g/m
2, thickness 35 μm; Select PLA/PHBV fibre length 51mm, fineness is the acid fiber by polylactic of 2.2dtex, reinforce through antistatic pretreatment, shredding, mixing, combing and hot melt and make top layer non-woven fabrics, wherein: first spray the antistatic additive of 4%, controlling fibre moisture regain rate and reach 6%; Secondly the fiber when combing, the combing speed of attentional manipulation roller and clearer card, to alleviate the damage to acid fiber by polylactic, is adjusted to 1150 ms/min by cylinder speed, working roll speed is 75 ms/min, upper angle stripper speed is 35 ms/min, and lower angle stripper speed is 42 ms/min, upper Condensing Roller speed 63 ms/min, lower Condensing Roller speed 52 ms/min, upper doffer speed is 78 ms/min, and lower doffer speed is 79 ms/min, and speed of production is 55 ms/min; Again adopt two-period form baking oven, control oven temperature and be respectively 85 DEG C, 120 DEG C, obtained polylactic acid non-woven fabrics grammes per square metre is 17g/m
2, thickness is 0.16mm.
2) preparation of water non-woven fabrics is refused on top layer:
Adopting above-mentioned 1) to prepare polylactic acid non-woven fabrics grammes per square metre be 25g/m to method
2, thickness is 0.18mm; Adopt organosilicon water repellent to process, consumption is 5%, and after a leaching one is rolled, preliminary drying temperature is 105 DEG C, baking temperature is 130 DEG C, and speed is 75 ms/min.Control preliminary drying time 2 minutes; The time of baking is 4 minutes.
3) preparation of sanitary towel
Intermediate non-woven fabrics and both sides are combined with each other by PUR through the non-woven fabrics refusing water treatment, make both sides refuse water non-woven fabrics and be positioned at above intermediate non-woven fabrics; Top layer non-woven fabrics and intermediate absorption core body, bottom antiseepage film and intermediate absorption core body are combined with each other by PUR, top layer non-woven fabrics and antiseepage counterdie are combined with each other by PUR and hot pressing, hot pressing combined temp is 130 DEG C, and the gluing temperature of low-temperature heat melting is 145 DEG C.
Experimental example: sanitary towel is detected:
1, the degradable napkin main performance of the top layer non-woven fabrics of the present embodiment 1-3, PLA antiseepage film and preparation is tested:
Test item is degradation property, the water absorbent rate of degradable napkin; Top layer non-woven fabrics biocidal property, breathability, wet guilding, pH value, water repellency; PLA degraded antiseepage film hydrostatic pressing, poisture-penetrability, concrete method of testing is as follows:
Degradability: test according to the method for standard ISO 14855:1999 and condition.
Water absorbent rate: test according to GB/T8939-2008 standard prescriptive procedure.
Biocidal property: adopt Ministry of Public Health " disinfection technology standard " (2002 editions) 2.1.8.7 to shake flask test and measure.
Breathability: according to GB/T5453-1997 standard testing.Adjustment test pressure differential is 60Pa, selects nozzle diameter 5mm.
Wet guilding: according to ZBW04019-1990 standard testing.Test cloth specimen specification 25mm*300mm, measures 60s suction head.
PH value: the method test specified according to GB/T8939-2008 standard appendix C.
Water repellency: refuse water rank test execution GB/T4745-1997 standard.
Resistance to hydrostatic pressure: test according to ISO0811-1981 standard prescriptive procedure.
Poisture-penetrability: test according to ASTME96 standard prescriptive procedure.
Testing result is in table 1.
Table 1: sanitary towel, non-woven fabrics, ventilation anti-seepage film test performance result
Table 1 result shows: in degradability, top layer non-woven fabrics biocidal property, breathability, wet guilding, PLA antiseepage film poisture-penetrability, the successful of embodiment 1-3 is better than the conventional sanitary napkin on market.
Conclusion: sanitary towel provided by the invention combination property successful is better than existing product.
Degradable napkin of the present invention, because selecting with three-chip type of acid fiber by polylactic top layer non-woven fabrics is reasonably combined, give sanitary towel good breathability, wet guilding and lateral leakage protection effect, and the biocidal property of test gained to staphylococcus aureus, escherichia coli and candida albicans all reaches and has exceeded the regulation of national standard; Selecting due to PLA ventilated membrane simultaneously, further increase breathability and the poisture-penetrability of sanitary towel of the present invention, and sanitary towel of the present invention can be degradable after tested, is the ideal substitute to existing sanitary towel on the market.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (8)
1. the preparation method of the degradable poly lactic acid sanitary towel of a lateral leakage protection, described degradable poly lactic acid sanitary towel comprises the top layer non-woven fabrics and bottom antiseepage film that arrange from inside to outside, described top layer non-woven fabrics is three chip architectures, the top layer non-woven fabrics of intermediate and the top layer non-woven fabrics of both wings bond together, and described top layer non-woven fabrics is acid fiber by polylactic non-woven fabrics or polylactic acid/PHBV fabric nonwoven cloth; Have by the coated wood pulp cellulose absorptive core of toilet paper at intermediate top layer non-woven fabrics and bottom antiseepage film central filler;
Described preparation method comprises step:
1) top layer nonwoven production:
Acid fiber by polylactic or polylactic acid/PHBV fiber spray antistatic agent treatment, then shredding, mixing, combing, directly becomes net, hot melt to reinforce, and obtains acid fiber by polylactic non-woven fabrics skin-material;
2) water nonwoven production is refused on top layer:
Step 1) debatching of gained hot melt acid fiber by polylactic non-woven fabrics, then pad organosilicon water repellent, preliminary drying, to bake, obtain acid fiber by polylactic and refuse water non-woven fabrics skin-material;
3) degradable napkin is produced:
Time of Fluff Slurry is pulverized, toilet paper input frictioning, wood pulp are coated, compacting, then divides and is cut to intermediate core body; Intermediate top layer non-woven fabrics input frictioning, the water non-woven fabrics of refusing of both wings inputs and intermediate top layer non-woven fabrics hot pressing compound, the coated middle core body of counterdie, surface layer non-woven fabrics, compound rolling, subsides release paper, obtained sanitary towel finished product.
2. preparation method according to claim 1, is characterized in that, the top layer nonwoven thickness of described intermediate is 0.08-0.18mm; The top layer nonwoven thickness of described both wings is 0.15-0.20mm.
3. preparation method according to claim 1 and 2, is characterized in that, described bottom antiseepage film is the one in the counterdie of the counterdie of PLA counterdie, PHA counterdie, PBS counterdie or PLA/PHA intermingling material, PLA/PBS intermingling material, thickness 25-45 μm.
4. preparation method according to claim 1, it is characterized in that, described step 1) combing is: adopt roller and clearer card to carry out combing, wherein cylinder speed is adjusted to 1100-1200 m/min, working roll speed is 70-80 m/min, upper angle stripper speed is 30-40 m/min, lower angle stripper speed is 40-51 m/min, upper Condensing Roller speed 58-72.5 m/min, lower Condensing Roller speed 45-65 m/min, upper doffer speed is 72-84 m/min, and lower doffer speed is 70-82 m/min, and speed of production is 50-60 m/min.
5. preparation method according to claim 1, is characterized in that, described step 1) hot melt reinforces and is: adopts two-period form baking oven to carry out hot melt reinforcing, controls oven temperature and be respectively 80-90 DEG C, 110-130 DEG C.
6. preparation method according to claim 1, is characterized in that, described step 2) pad organosilicon water repellent and be:
Water treatment is refused to for the acid fiber by polylactic of both wings or polylactic acid/PHBV fabric nonwoven cloth, adopt organosilicon water repellent, consumption is 3-6%, adopt the method that a leaching one is rolled, then carry out preliminary drying with two-period form baking oven and bake, control operation condition is respectively preliminary drying temperature 100-110 DEG C, time 1-3 minute; Baking temperature 120-140 DEG C, the time is 2-4 minute.
7. preparation method according to claim 1, it is characterized in that, described step 3) both sides refuse the input of water non-woven fabrics and are complex as with the non-woven fabrics hot pressing of intermediate top layer: the non-woven fabrics that the process of intermediate non-woven fabrics and both wings refuses water treatment is combined with each other by PUR, the water non-woven fabrics of refusing of both wings is positioned at above the non-woven fabrics of intermediate top layer, and local is overlapping.
8. preparation method according to claim 7, it is characterized in that, top layer non-woven fabrics and intermediate absorption core body, bottom antiseepage film and intermediate absorption core body are combined with each other by PUR, top layer non-woven fabrics and antiseepage counterdie are combined with each other by PUR and hot pressing, hot pressing combined temp is 120-140 DEG C, described PUR is low-temperature hot melt adhesive, and gluing temperature is 140-150 DEG C.
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| CN105232230A (en) * | 2015-10-14 | 2016-01-13 | 嘉兴润之缘养生文化有限公司 | Polylactic acid fiber sanitary napkin |
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| CN112622374B (en) * | 2020-12-18 | 2022-09-06 | 苏州谷原生物科技有限公司 | Polylactic acid nanofiber non-woven fabric surface layer and degradable sanitary towel prepared from same |
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