CN104096258A - Anti-side leakage degradable polylactic acid sanitary napkin and preparation method thereof - Google Patents
Anti-side leakage degradable polylactic acid sanitary napkin and preparation method thereof Download PDFInfo
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Abstract
The invention provides an anti-side leakage sanitary napkin, which includes a surface non-woven fabric and a bottom impermeable membrane disposed from the inside out. The surface non-woven fabric has a three-piece structure, the intermediate piece of surface non-woven fabric and the two-wing surface non-woven fabrics are sticked together, and the space between the intermediate piece of surface non-woven fabric and the bottom impermeable membrane is filled with a toilet paper coated wood pulp cellulose absorption core. The surface of the sanitary napkin provided by the invention is composed of 100% polylactic acid fiber or PLA/PBHV fiber hot blast nonwoven fabric. The polylactic acid fiber retains the original characteristics and does not cause any damage. As polylactic acid is formed by polymerization of lactic acid molecules as monomers and spinning, polylactic acid molecules with short molecular chains possibly exist on the fiber surface, so that the pH value of a polylactic acid non-woven fabric surface shows weak acidity and is consistent with that of human body skin. Also an odor removal function is provided. The lateral two pieces of non-woven fabrics have greater gram weight and thickness than the intermediate piece, and side leakage cannot be caused.
Description
Technical field
The invention belongs to hygiology field, be specifically related to a kind of sanitary towel of anti-side leakage.
Background technology
There are statistics to show, whole world female population quantity approximately 3,500,000,000 people at present, 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 10 grams of a slice sanitary towel weight, thereby 2,000,000,000 women within 1 year, will produce the rubbish of 9,600,000 tons of left and right, the volume ratio of occupying due to these " white garbages " is larger, carry out landfill disposal according to existing processing method and 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, thereby, produce and use degradable napkin, change material therefor in existing product, make it to abandon be buried in underground after, the process regular hour can produce degraded, return the living environment of mankind's green, very necessary.
The degraded sanitary towel relating in existing patent mainly contains:
Chinese patent CN200520143315.8 has reported a kind of all sanitary belts of degradation treatment, formed by degraded wood pulp paper, degradation water prick nonwoven cloth, degradation water prick nonwoven cloth is positioned on degraded wood pulp paper and is compound with degraded waterproof wood pulp paper, and 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 is located under hydrophilic layer and is positioned on dust-free paper and water suction macromolecule mixed layer, and dust-free paper mixes with the macromolecule that absorbs water.
Can find out from above-mentioned data, in existing degraded sanitary towel or sanitary pad, the sanitary towel's water absorbent rate that have complex manufacturing, is difficult to realize national Specification must be greater than the standard of 7 times and the feature of function singleness, thereby the market of facing is narrow with use colony, in 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 to propose a kind of degradable poly lactic acid sanitary towel of anti-side leakage.
Another object of the present invention is the preparation method that proposes a kind of sanitary towel.
Realizing above-mentioned purpose technical scheme of the present invention is:
A degradable poly lactic acid sanitary towel for anti-side leakage, comprises the top layer non-woven fabrics and the 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; In the middle of intermediate top layer non-woven fabrics and bottom antiseepage film, be filled with the wood pulp cellulose absorptive core being coated by toilet paper.
" 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 counterdie, PLA/PBS intermingling material of PLA film, PHA film, PBS film or PLA/PHA intermingling material, thickness 25-45 μ m.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, 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 is inputted frictioning, wood pulp is coated, compacting, then will divide and be cut to intermediate core body; Intermediate top layer non-woven fabrics input frictioning, it is compound with the non-woven fabrics hot pressing of intermediate top layer that the input of water non-woven fabrics is refused in both sides, and counterdie, the coated middle core body of surface layer non-woven fabrics, compound rolling, subsides release paper, make sanitary towel's finished product.
Further, described step 1) combing is: adopt roller and clearer card to carry out combing, wherein cylinder speed is adjusted into 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:
Acid fiber by polylactic for both wings or polylactic acid/PHBV fabric nonwoven cloth are refused to water treatment, adopt organosilicon water repellent, consumption is 3-6%, adopt one to soak a method of rolling, then carry out preliminary drying and bake with two-period form baking oven, 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, speed of production is 70-80 m/min.
Wherein, described step 3) both sides refuse the input of water non-woven fabrics and the non-woven fabrics hot pressing of intermediate top layer is complex as: the non-woven fabrics that the process of intermediate non-woven fabrics and both wings is refused 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, local 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 static, shredding, mix, combing and hot melt are reinforced the good control of key point in processing method, make acid fiber by polylactic retain 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, the slightly acidic environment of protectiveness can be provided to female menstrual period, consistent bacterial growth, the function that eliminates the unusual smell is provided simultaneously,
2) acid fiber by polylactic performance is close to polyster fibre, there is preferably stretching property by force, but hygroscopicity is poor, regain is only 0.4%, but acid fiber by polylactic is different from the performance of polyster fibre, to be that it is led moist good, thereby used as the intermediate (seeing (1) in Fig. 1) of three-chip type top layer non-woven fabrics, can rapidly menses fast guiding be arrived to intermediate absorption sandwich layer, simultaneously because its poor hygroscopicity keeps the dry and comfortable property of cloth cover, for female menstrual period provides dry and comfortable and clean environment;
3) in the non-woven fabrics of polylactic acid top layer, grammes per square metre and the thickness of two-piece type (seeing (2) 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 has passed through organosilicon and has refused water treatment simultaneously, in further stoping side non-woven fabrics to absorb menses, make non-woven fabrics obtain soft and smooth feel, make menses in dirty process, refuse the obstruct of water non-woven fabrics and be seeped in absorbed layer directly owing to being subject to side, can not produce side leakage;
4) the intermediate absorption sandwich layer of sanitary towel of the present invention is made up of the coated wooden floss slurry of toilet paper, and raw material all comes from 100% wood pulp cellulose, thereby can reach 100% degraded, and absorbency can reach the standard of GB GB/T8939-2008 completely simultaneously;
5) counterdie of sanitary towel of the present invention has adopted PLA, PLA/PHA, PLA/PBS film, has good spendable mechanical property and pliability, has good breathability simultaneously, has increased 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, any performance that can loss PLA film simultaneously.
In a word, sanitary towel provided by the invention not only can effectively prevent side leakage, and possessed antibacterial, eliminate the unusual smell, moisture absorption is ventilative, soft comfortable and feature that can be degradable, it is the desirable substitution material of existing sanitary towel, further to have solved that existing hygienic material can not be degraded and can't bear the heavy load of bringing to environment, because of but a kind of sanitary towel with brand-new environmental protection and function theory has extraordinary market prospect.
Brief description of the drawings
Fig. 1 is the axonometric chart of sanitary towel of the present invention.
In figure, the 1 top layer non-woven fabrics that is intermediate, the 2 top layer non-woven fabrics that are 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, it is Maanshan Tongjieliang Biomaterials Co., Ltd. that PLA/PHBV fiber is bought producer; Antistatic additive: purchased from the Hangzhou Chemical Co., Ltd. of standing upright, 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 are provided by Maanshan Tongjieliang Biomaterials Co., Ltd..
In the following description of the present invention, if no special instructions, the means that use are the technological means of this area routine.
Embodiment 1
As Fig. 1, the sanitary towel of a kind of anti-side leakage that the present invention proposes, comprise the top layer non-woven fabrics and the 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; In the middle of intermediate top layer non-woven fabrics and bottom antiseepage film, be filled with the wood pulp cellulose absorptive core being coated by toilet paper.
Wherein, top layer non-woven fabrics 1 thickness of intermediate is 0.08mm.Top layer non-woven fabrics 2 thickness of both wings are 0.15mm.Bottom antiseepage film is PLA/PHA film, thickness 25 μ m.
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 μ m; Select 100% acid fiber by polylactic length 38mm, fineness is the acid fiber by polylactic of 1.67dtex, reinforce and make top layer non-woven fabrics through antistatic pretreatment, shredding, mixing, combing and hot melt, wherein: first spray 2% antistatic additive, control fiber regain and reach 5%; Secondly fiber in the time of combing, note controlling 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 into 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, 72.5 ms/min of upper Condensing Roller speed, 65 ms/min of lower Condensing Roller speed, 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, making 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, the cotton feeding amount of increase machine, preparing polylactic acid non-woven fabrics grammes per square metre is 22g/m
2(parameter setting is good, and roller and clearer card is adjusted automatically), thickness is 0.15mm; Adopt organosilicon water repellent to process, consumption is 3%, through one soak one roll after, preliminary drying temperature is that 100 DEG C, baking temperature are 120 DEG C, speed is 80 ms/min, controls 2 minutes preliminary drying time; 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 of refusing water treatment, make both sides refuse water non-woven fabrics and push down above intermediate non-woven fabrics, (the top layer non-woven fabrics 1 Ge Youyi overlapping region, 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 μ m; Select 100% acid fiber by polylactic length 51mm, fineness is the acid fiber by polylactic of 13.3dtex, reinforce and make top layer non-woven fabrics through antistatic pretreatment, shredding, mixing, combing and hot melt, wherein: first spray 4% antistatic additive, control fiber regain and reach 8%; Secondly fiber in the time of combing, the combing speed of noting controlling roller and clearer card, to alleviate the damage to acid fiber by polylactic, is adjusted into 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, 58 ms/min of upper Condensing Roller speed, 45 ms/min of lower Condensing Roller speed, 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, making 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%, through one soak one roll after, preliminary drying temperature is that 110 DEG C, baking temperature are 140 DEG C, speed is 70 ms/min.Control 2 minutes preliminary drying time; 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 of 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 μ m; Select PLA/PHBV fibre length 51mm, fineness is the acid fiber by polylactic of 2.2dtex, reinforce and make top layer non-woven fabrics through antistatic pretreatment, shredding, mixing, combing and hot melt, wherein: first spray 4% antistatic additive, control fiber regain and reach 6%; Secondly fiber in the time of combing, the combing speed of noting controlling roller and clearer card, to alleviate the damage to acid fiber by polylactic, is adjusted into 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, 63 ms/min of upper Condensing Roller speed, 52 ms/min of lower Condensing Roller speed, 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, making 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%, through one soak one roll after, preliminary drying temperature is that 105 DEG C, baking temperature are 130 DEG C, speed is 75 ms/min.Control 2 minutes preliminary drying time; 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 of 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 to 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, lead moist, 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 concussion flask test to measure.
Breathability: according to GB/T5453-1997 standard testing.Adjustment test pressure differential is 60Pa, selects nozzle diameter 5mm.
Lead moist: according to ZB W04019-1990 standard testing.Test cloth specimen specification 25mm*300mm, measures 60s suction head.
PH value: the method test specifying 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 ASTM E96 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, lead aspect moist, PLA antiseepage film poisture-penetrability, the successful of embodiment 1-3 is better than the common sanitary towel 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 the good breathability of sanitary towel, lead moist and anti-side leakage effect, and test gained all reaches and exceeded the regulation of national standard to the biocidal property of staphylococcus aureus, escherichia coli and candida albicans; While, because PLA ventilated membrane selects, more increased 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, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (9)
1. a degradable poly lactic acid sanitary towel for anti-side leakage, comprises the top layer non-woven fabrics and the bottom antiseepage film that arrange from inside to outside, it is characterized in that,
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; In the middle of intermediate top layer non-woven fabrics and bottom antiseepage film, be filled with the wood pulp cellulose absorptive core being coated by toilet paper.
2. sanitary towel 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. sanitary towel according to claim 1 and 2, is characterized in that, described bottom antiseepage film is the one in the counterdie of counterdie, PLA/PBS intermingling material of PLA counterdie, PHA counterdie, PBS counterdie or PLA/PHA intermingling material, thickness 25-45 μ m.
4. the preparation method of the arbitrary described sanitary towel of claim 1-3, 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, 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 is inputted frictioning, wood pulp is coated, compacting, then divides and is cut to intermediate core body; Intermediate top layer non-woven fabrics input frictioning, both wings to refuse the input of water non-woven fabrics compound with the non-woven fabrics hot pressing of intermediate top layer, in the middle of counterdie, surface layer non-woven fabrics are coated, core body, compound rolling, subsides release paper, make sanitary towel's finished product.
5. preparation method according to claim 3, it is characterized in that, described step 1) combing is: adopt roller and clearer card to carry out combing, wherein cylinder speed is adjusted into 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.
6. preparation method according to claim 3, 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.
7. preparation method according to claim 3, is characterized in that, described step 2) pad organosilicon water repellent and be:
Acid fiber by polylactic for both wings or polylactic acid/PHBV fabric nonwoven cloth are refused to water treatment, adopt organosilicon water repellent, consumption is 3-6%, adopt one to soak a method of rolling, then carry out preliminary drying and bake with two-period form baking oven, 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.
8. preparation method according to claim 3, it is characterized in that, described step 3) both sides refuse the input of water non-woven fabrics and the non-woven fabrics hot pressing of intermediate top layer is complex as: the non-woven fabrics that the process of intermediate non-woven fabrics and both wings is refused 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, local overlapping.
9. preparation method according to claim 8, 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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| CN110549709A (en) * | 2018-05-31 | 2019-12-10 | 苏州普来安高分子材料有限公司 | Composite film used as impermeable layer and preparation method thereof |
| CN110923948A (en) * | 2019-12-18 | 2020-03-27 | 章莉 | Preparation method of surface layer of sanitary towel for sports |
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| CN112622374A (en) * | 2020-12-18 | 2021-04-09 | 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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| CN105922670A (en) * | 2016-03-31 | 2016-09-07 | 无锡爱米克斯无纺科技有限公司 | Degradable skin friendly non-woven fabric |
| CN106087244B (en) * | 2016-07-12 | 2019-08-06 | 浙江金三发卫生材料科技有限公司 | A kind of non-woven material and its preparation process with asymmetric transmission characteristic |
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| CN106894160A (en) * | 2017-02-22 | 2017-06-27 | 嘉兴学院 | A kind of acid fiber by polylactic flowing layer material and preparation method thereof |
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| CN106974768A (en) * | 2017-02-22 | 2017-07-25 | 嘉兴学院 | A kind of high degradation rate flowing layer material and preparation method thereof |
| CN107898560A (en) * | 2017-11-27 | 2018-04-13 | 浙江她说生物科技有限公司 | A kind of black sanitary napkin |
| CN110549709A (en) * | 2018-05-31 | 2019-12-10 | 苏州普来安高分子材料有限公司 | Composite film used as impermeable layer and preparation method thereof |
| CN110179701A (en) * | 2019-07-10 | 2019-08-30 | 南京怡康抗菌材料科技有限公司 | A kind of formula and preparation method thereof of biology base synthetic fibers antibacterial facial mask |
| CN110406218A (en) * | 2019-08-27 | 2019-11-05 | 河北维嘉无纺布有限公司 | A kind of health PLA compound nonwoven cloth and preparation method thereof |
| CN110923948A (en) * | 2019-12-18 | 2020-03-27 | 章莉 | Preparation method of surface layer of sanitary towel for sports |
| CN112294545A (en) * | 2020-10-23 | 2021-02-02 | 福建省时代天和实业有限公司 | Full-degradable environment-friendly paper diaper |
| CN112622374A (en) * | 2020-12-18 | 2021-04-09 | 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 |
| 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 |
| CN113116636A (en) * | 2021-04-06 | 2021-07-16 | 美佳爽（中国）有限公司 | Preparation method of degradable sanitary towel |
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