CN108652832B - Menstrual pants and preparation method thereof - Google Patents

Menstrual pants and preparation method thereof Download PDF

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Publication number
CN108652832B
CN108652832B CN201810267101.3A CN201810267101A CN108652832B CN 108652832 B CN108652832 B CN 108652832B CN 201810267101 A CN201810267101 A CN 201810267101A CN 108652832 B CN108652832 B CN 108652832B
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ptt
mixed fiber
pet
pet mixed
woven
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CN108652832A (en
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薛韬
方瑞峰
钱程
王怡婷
毛雯雯
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Jiaxing University
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Jiaxing University
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Epidemiology (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Nonwoven Fabrics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

The invention discloses menstrual pants and a preparation method thereof, and relates to the technical field of disposable sanitary products. According to the menstrual period trousers and the preparation method thereof, the PTT fibers and the PTT/PET bicomponent fibers are selected, the opening carding and the spunlace reinforcement process are adjusted, and the special shrinking and folding processes are selected, so that the prepared elastic non-woven fabric has excellent elasticity, and meanwhile, the prepared elastic non-woven fabric has good flexibility, comfort and breathability, has better safety, can be used for the waist part of the menstrual period trousers, can increase the compression area of the menstrual period trousers on the abdomen of a female, enables the abdomen to be stressed more uniformly, can avoid the excessive compression of the common menstrual period trousers on the abdomen of the menstrual period female, and is simple in processing process, low in processing cost and suitable for sustainable production.

Description

Menstrual pants and preparation method thereof
Technical Field
The invention relates to the technical field of disposable sanitary products, in particular to menstrual pants and a preparation method thereof.
Background
In the life process from birth to aging of a female, the menstrual cycle is between 12 years and 51 years, which means that more than 2300 days of life are in the menstrual period, and the sanitary towel becomes the indispensable menstrual period nursing product for the female. The sanitary towel can be divided into daily use and night use according to the use time period, but the sanitary towel is required to be adhered to underpants for use regardless of daily use or night use, so that the sanitary towel can be displaced to cause the side leakage phenomenon when the user sleeps in wrong postures or does physical exercise at night. Thus, during periods of greater menstrual volume, the panties can be safer and more comfortable for the woman to spend a particular number of days.
Panties for female menstrual period is actually a disposable panties type sanitary towel, which combines the panties worn by female at ordinary times and the sanitary towel into a whole, overcomes the possible leakage of the single sanitary towel and the inconvenient cleaning of the panties, and can provide cleaner and convenient anti-leakage protection for female during menstrual period.
From the structure, the disposable female menstrual period trousers mainly comprise a surface layer non-woven fabric, a flow guide layer, an absorption core body, an elastic ring waist, a three-dimensional protection and the like, wherein the elastic ring waist is composed of 15-16 rubber bands and an outer wrapping non-woven fabric, although the elastic ring waist is good in elasticity and strong in fit with a human body, the pressure generated on the human body is large, particularly, the belly of a female is often distended and painful during the menstrual period, and the red mark can be drawn on the surface of the skin after the female trousers are worn for a long time, so that the taking comfort is poor.
The existing data related to the elastic waist of disposable female menstrual pants comprises:
patent CN201520584008.7 relates to menstrual pants, which comprise a menstrual pants body, wherein the menstrual pants body is composed of a skin-friendly inner layer, a middle absorption layer and an outer layer which are sequentially stacked from inside to outside, a waist rubber band is arranged in the waist part of the menstrual pants body, a plurality of rubber bands are longitudinally arranged in the crotch part of the menstrual pants body and are positioned in the middle of the crotch part, when the menstrual pants are used, the crotch of the menstrual pants is completely attached to the crotch of a human body, so that the absorption layer of the menstrual pants can absorb liquid uniformly, and the effective liquid absorption rate of the menstrual pants is improved; the menstrual pants are light and thin and breathable, so that the use comfort of the menstrual pants is improved.
Patent CN201420527213.5 relates to a women's menstrual period trousers, include the main part absorption portion of constituteing by superficial layer, middle absorbed layer, bottom leak protection layer to and be used for binding elastic waistline portion with the human body, the superficial layer be hydrophilic non-woven fabrics, middle absorbed layer be upper dustless paper and the dustless paper parcel of lower floor's puffy non-woven fabrics that contains the dispersion SAP granule, be provided with the guiding gutter on the middle absorbed layer, bottom leak protection layer be the PE ventilated membrane, elastic waistline portion waistline and elasticity after by the elasticity waistline form through the hot melt adhesive. The menstrual pants are more close to the body, and the nursing articles are not required to be displaced due to sports; the menstrual period trousers are lighter and thinner, and are only 2-4 mm; the middle absorption layer is made of dust-free paper to wrap the bulky non-woven fabric containing SAP long fibers, has a flow guiding effect, is combined with SAP particles dispersed in the middle absorption layer to enable absorption to be faster, and does not break or lump after absorption.
Patent CN201520511046.X relates to a women menstrual underpants antibacterial sanitary napkin, including antibacterial water permeability surface course, absorption core, non-permeable surface bottom, characterized in that, non-permeable surface bottom is by the compound flaky backer that forms of outer non-woven fabrics of non-permeable, non-permeable inner non-woven fabrics, be equipped with S-shaped crotch bending elasticity, waistline buttockss elasticity between outer non-woven fabrics of non-permeable, the non-permeable inner non-woven fabrics on the backer, be equipped with waistline coupling assembling between the waist line buttockss elasticity both sides of backer front end and rear end waistline buttockss elasticity, be equipped with non-woven fabrics waistline facing between backer and waistline buttockss elasticity, the absorption core indicates the absorption layer, this absorption layer adopts compound absorbent paper, the cladding has the leak protection basement membrane below the absorption core, the absorption core side is equipped with the three-dimensional flange of preventing side leakage, the leak protection basement membrane is pasted on flaky backer, antibacterial water, the facing layer covers the upper surface of the absorbent core.
It can be seen from the above data that the elasticity of the elastic waist band of the conventional disposable female menstrual period pants is realized by the elasticity of the elastic threads, and the use of a plurality of elastic threads may cause greater pressure on the abdomen of a female in the menstrual period, so that the abdominal discomfort of the female in the menstrual period is aggravated, and the user experience of the female in the menstrual period is affected.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides menstrual period pants and a preparation method thereof.
According to a first aspect of embodiments of the present invention, there is provided a method of making menstrual pants, the method comprising:
mixing PTT fibers and PTT/PET bicomponent fibers to obtain PTT and PTT/PET mixed fibers, wherein the proportion of the PTT fibers to the PTT/PET bicomponent fibers in the PTT and PTT/PET mixed fibers is 50-70%: 30-50%, spraying antistatic liquid to the PTT and PTT/PET mixed fiber, and standing the sprayed PTT and PTT/PET mixed fiber for 4-6h to enable the moisture regain of the PTT and PTT/PET mixed fiber to reach 8.1-10.2%, wherein the antistatic liquid comprises the following components in percentage by weight: water in 6-10 wt% and water in 90-94 wt%, and the antistatic softening agent is non-ionic;
and carrying out the procedures of coarse opening, fine opening, carding and cross lapping on the standing PTT and PTT/PET mixed fibers to obtain a PTT and PTT/PET mixed fiber web, wherein the opening and carding procedure has the following process parameters: the linear speeds of the opening rollers are 550-730m/min, 750-850 m/min and 900-950 m/min respectively; the main cylinder speed is 700-920 m/min, the speed ratio of the cylinder to the working roll is 10.1-13.5: 1, the number of the cross lapping layers is 2-4, and the drafting multiple is 1.45-2.10 times;
carrying out spunlace reinforcement on the PTT and PTT/PET mixed fiber web by adopting 3 groups of spunlace heads, wherein the spunlace reinforcement process parameters are as follows: the water-jet pressure is respectively 15-35bar, 68-90bar and 100-120 bar;
sending the PTT and PTT/PET mixed fiber web subjected to the spunlace reinforcement procedure into a drying room for drying to obtain the PTT and PTT/PET mixed fiber web with the gram weight of 50-65g/m2PTT and PTT/PET mixed fiber non-woven base fabric with the thickness of 66.1-75 mu m and the longitudinal pre-shrinkage of 40-65%, and the PTT and PTT/PET mixed fiber non-woven base fabric is cut into the specification with the width of 1.5m, wherein the process parameters of the drying procedure are as follows: drying by adopting a drying mode combining double groups of drying rollers and rotary screen hot air penetration, wherein the number of each group of drying rollers is 6, the temperature of each drying roller is controlled to be 108-DEG C130 DEG, the hot air penetration temperature of the rotary screen is 120-DEG C135 DEG, and the hot air penetration air quantity is controlled to be 70000-DEG C80000 m3H, the drying speed is 40-50 m/min;
stretching a stretching film with the width of 2m for 360-390 percent along the whole width direction, flatly laying the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric, and lightly fixing the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric by a hot roll with a rolling point, wherein the technological parameters of the light fixing process are as follows: the temperature of the hot roller is controlled to be 105-115 ℃, the surface roll point of the hot roller is a square small block, and the area of the roll point in the PTT and PTT/PET mixed fiber non-woven base fabric is as follows: the area of the rolled point is 80: 1;
sending the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film into a guide roller type steam setting machine for carrying out a heat setting process, wherein the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film passes through 15 pairs of cloth guide rollers in the guide roller type steam setting machine in an up-and-down passing mode after being wetted and preheated by hot steam, the stretching film retracts under the action of the hot steam, and then the PTT and PTT/PET mixed fiber non-woven base cloth is driven to form preset number of folds vertical to the longitudinal direction, and the process parameters of the heat setting process are as follows: the heat setting time is 8-10min, the heat setting temperature is 105-;
sending the PTT and PTT/PET mixed fiber non-woven base cloth subjected to the heat setting procedure into a hot air oven to be dried for 3-6min, and stripping the stretched film shrunk on the PTT and PTT/PET mixed fiber non-woven base cloth to obtain the elastic non-woven cloth with folds and with the elongation of 180-200%, wherein the working temperature of the hot air oven is 85-95 ℃;
and (3) preparing the elastic non-woven fabric, the bottom film composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional protection and the surface layer material together to obtain a finished menstrual period trousers, wherein the elastic non-woven fabric is positioned at the whole waistline part of the menstrual period trousers.
In a preferred embodiment, the elastic non-woven fabric, the base film composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional apron and the surface layer material are jointly prepared to obtain a finished menstrual period pants product, which comprises:
the width of the coating is 100mm, and the gram weight is 430g/m2After glue is sprayed, the absorption core body is compounded and compacted with the diversion layer, and the absorption core body coated with the hydrophilic spun-bonded non-woven fabric is cut and molded;
unreeling the basement membrane, spraying glue, and compounding the basement membrane with the bottom non-woven fabric to form basement membrane composite non-woven fabric;
spraying glue on the water-repellent SMS non-woven fabric and the leg rubber band yarn to coat the water-repellent SMS non-woven fabric and the leg rubber band yarn to form a water-repellent SMS non-woven fabric three-dimensional enclosure;
cutting the elastic non-woven fabric into pieces with the width of 860cm, wrapping and sewing the cut elastic non-woven fabric and the basement membrane composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional enclosure and the surface layer material, performing composite compaction, cutting, folding and stacking, counting, bagging and packaging to obtain a menstrual period pants finished product.
In a preferred embodiment, the fiber fineness of the PTT fiber is 1.5-3D, the fiber length is 38-51mm, the fiber structure of the PTT/PET bicomponent fiber is eccentric, the eccentric ratio is 7:3, the fiber fineness is 2-3D, and the fiber length is 40-51 mm.
In a preferred embodiment, the stretched film is an LLDPE film having a thickness of 0.055 to 0.065mm, a tensile strength of 30 to 35MPa in the machine direction and 25 to 30MPa in the transverse direction.
In a preferred embodiment, the surface viscosity of the stretched film is 3.1-2.8N at a stretch ratio of 350-400%.
In a preferred embodiment, for each corrugation on the PTT and PTT/PET mixed fiber nonwoven substrate that has undergone the heat-setting process, the width of the corrugation is 1.2 to 2.2mm, and the arrangement density of the corrugation is 22 to 27 strips/5 cm.
According to a second aspect of embodiments of the present invention, there is provided menstrual pants, wherein the menstrual pants are produced by the method of making any of the above-described menstrual pants.
Compared with the prior art, the menstrual pants and the preparation method thereof provided by the invention have the following advantages:
firstly, the environment is protected. The invention adopts single-layer elastic non-woven fabric as the integral girth of the female menstrual period trousers, the elastic non-woven fabric is directly fed into the diaper machine from the external rack of the diaper machine for production during production, the three-layer glue spraying compounding process of the original inner-layer hot-air non-woven fabric, the middle rubber band wire and the outer-layer hot-air non-woven fabric is omitted, the three external racks which are used for placing the inner-layer hot-air non-woven fabric, the middle rubber band wire and the outer-layer hot-air non-woven fabric beside the diaper machine are omitted, and a hot melt adhesive cylinder (used for melting hot melt adhesive) specially prepared for compounding the waist rubber band wire, the inner-layer hot-air non-woven fabric and the outer-layer hot-air non-woven fabric is omitted, so that.
Secondly, comfortable air permeability is good. The elastic ring waist of the prior female menstrual period trousers comprises three layers of inner layer hot air non-woven fabric, middle rubber band thread and outer layer hot air non-woven fabric, wherein the three layers are glued together by respectively spraying rubber band thread and non-woven fabric hot melt glue on the rubber band thread, the inner layer hot air non-woven fabric and the outer layer hot air non-woven fabric, wherein the middle rubber band thread comprises 15 to 18, because the belly of most females often swells and pains during menstrual period, the pressure on the belly and the waist of the human body is large when the female wearers wear the trousers, and a oppression feeling is caused, and because the elastic ring waist is formed by compounding the three layers of heating melt glue, the problems of poor air permeability, easy glue seepage of the inner layer; the elastic non-woven fabric belongs to a single-layer structure, the raw material base material of the elastic non-woven fabric is actually a spunlace non-woven fabric containing PTT fibers and PET/PTT bi-component fibers, and the elastic non-woven fabric has the characteristics of softness, comfort and good air permeability, does not contain any externally added chemical auxiliary agent, and has better safety and health.
Thirdly, the elasticity is good. Although the spunlace nonwoven fabric on the market is soft and comfortable, the spunlace nonwoven fabric does not have any elasticity, and the elasticity of the elastic nonwoven fabric is realized by the following two aspects: 1) the adoption of the unique fiber raw materials: the PTT fiber and PTT/PET core-offset bicomponent fiber mixture are used as raw materials, wherein the PTT is a polytrimethylene terephthalate which is a new member in a polyester family and has lower initial modulus, the elasticity of the PTT fiber is better than that of chinlon and lower than that of spandex, and the PTT fiber macromolecular chain has odd carbon effect, so the PTT fiber has better stretching elasticity and rebound resilience, and generates numerous irregular natural curls to generate shrinkage under the action of steam heating; on the other hand, the other component in the fiber blend is PTT/PET bicomponent fiber, and due to the adoption of the core-offset structural design, one side of the PTT component in the parallel composite fiber has larger potential shrinkage rate than one side of the PET component under the action of steam heating. When heated, the PTT component with large shrinkage rate shrinks, and one side of the PET component with low shrinkage rate has the tendency of stretching when compressed, so that single fibers intertwined with each other in the fiber web curl and distort due to different stress directions and stress magnitudes of each point, the fibers intertwine with each other more tightly to form a three-dimensional structure which is mutually staggered and hooked, and the elasticity of the non-woven fabric base cloth containing the PTT fibers and the PTT/PET bi-component fibers is increased to a certain degree; 2) selection of a special processing technology: when the non-woven base fabric containing the PTT fibers and the PTT/PET bicomponent fibers is prepared, opening, carding and web forming processes with multiple combs, less beating, low speed and low draft ratio are selected, so that a uniform fiber web is more favorably formed, meanwhile, three spunlace reinforcements are adopted to form the non-woven base fabric with an open structure, the non-woven base fabric can be retracted in a certain proportion in the spunlace drying process, and a foundation is laid for the next special shrinkage process; 3) the adoption of the unique shrinking process: the stretched stretch film compounded with the PTT fiber and PET/PTT bicomponent fiber non-woven fabric base cloth is sent into a steam setting machine in a tension-free mode for steam shrinkage processing, the PTT fiber further retracts under the action of hot steam, meanwhile, the PTT/PET bicomponent fiber further retracts to form three-dimensional curling, in addition, internal stress accumulated in the pre-stretched stretch film further retracts under the action of damp heat, and then a plurality of folds which are vertical to the longitudinal direction (machine direction) and are arranged tightly are formed on the cloth surface, the elastic elongation of the finally formed elastic non-woven fabric is between 180% and 200%, and the elastic requirement of a female in wearing and taking off menstrual pants can be completely met.
In conclusion, according to the menstrual period pants and the preparation method thereof provided by the invention, through selection of the PTT fiber and the PTT/PET bicomponent fiber, adjustment of opening carding and spunlace reinforcement processes and selection of special contraction and contraction processes, the prepared elastic non-woven fabric has excellent elasticity, and simultaneously has good softness, comfort and breathability, and better safety, the elastic non-woven fabric is used for the waist part of the menstrual period pants, so that the pressure stress surface of the menstrual period pants on the abdomen of a female is larger and more uniform, the compression on the abdomen of the menstrual period female can be avoided, meanwhile, the processing technology of the menstrual period pants is simple, the processing cost is lower, and the menstrual period pants are suitable for sustainable production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic view of a pair of menstrual pants according to an embodiment of the present invention.
Detailed Description
The present invention is described in detail below with reference to specific embodiments (but not limited to) for illustration, the specific method of the embodiments is only for the purpose of illustration, the scope of the present invention is not limited by the embodiments, the present invention can be applied to various modifications and changes of various forms and structures, and these equivalents based on the present invention are also within the scope of the claims of the present invention. The antistatic softener used in the examples of the present invention was obtained from the limited of the textile products for solar energy in Dongguan.
Example 1
Step 101, mixing PTT fibers and PTT/PET bicomponent fibers to obtain PTT and PTT/PET mixed fibers, wherein the proportion of the PTT fibers to the PTT/PET bicomponent fibers in the PTT and PTT/PET mixed fibers is 50-70%: 30-50%, spraying antistatic liquid to the PTT and PTT/PET mixed fiber, and standing the sprayed PTT and PTT/PET mixed fiber for 4-6h to enable the moisture regain of the PTT and PTT/PET mixed fiber to reach 8.1-10.2%, wherein the antistatic liquid comprises the following components in percentage by weight: the water accounts for 6-10 percent and 90-94 percent, and the antistatic softening agent is nonionic.
102, carrying out coarse opening, fine opening, carding and cross lapping on the standing PTT and PTT/PET mixed fiber to obtain a PTT and PTT/PET mixed fiber web, wherein the opening and carding process has the following process parameters: the linear speeds of the opening rollers are 550-730m/min, 750-850 m/min and 900-950 m/min respectively; the main cylinder speed is 700-920 m/min, the speed ratio of the cylinder to the working roll is 10.1-13.5: 1, the number of the cross lapping layers is 2-4, and the drafting multiple is 1.45-2.10 times.
103, carrying out a spunlace reinforcement process on the PTT and PTT/PET mixed fiber web by adopting 3 groups of spunlace heads, wherein the spunlace reinforcement process parameters are as follows: the water-jet pressure is 15-35bar, 68-90bar and 100-120bar respectively.
104, subjecting the PTT and PTT/P subjected to the spunlace reinforcement process to a water jet strengthening processSending the ET mixed fiber web into a drying room for drying to obtain the product with the gram weight of 50-65g/m2PTT and PTT/PET mixed fiber non-woven base fabric with the thickness of 66.1-75 mu m and the longitudinal pre-shrinkage of 40-65%, and the PTT and PTT/PET mixed fiber non-woven base fabric is cut into the specification with the width of 1.5m, wherein the process parameters of the drying procedure are as follows: drying by adopting a drying mode combining double groups of drying rollers and rotary screen hot air penetration, wherein the number of each group of drying rollers is 6, the temperature of each drying roller is controlled to be 108-DEG C130 DEG, the hot air penetration temperature of the rotary screen is 120-DEG C135 DEG, and the hot air penetration air quantity is controlled to be 70000-DEG C80000 m3H, the drying speed is 40-50 m/min.
105, stretching a stretching film with the width of 2m by 360-390% along the whole width direction, flatly laying the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric, and lightly fixing the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric by using a hot roll with a rolling point, wherein the technological parameters of the light fixing process are as follows: the temperature of the hot roller is controlled to be 105-115 ℃, the surface roll point of the hot roller is a square small block, and the area of the roll point in the PTT and PTT/PET mixed fiber non-woven base fabric is as follows: the area of the rolled point is 80: 1.
106, sending the PTT and PTT/PET mixed fiber non-woven base fabric fixed with the stretching film into a guide roller type steam setting machine for a heat setting process, carrying out hot steam humidifying and preheating on the PTT and PTT/PET mixed fiber non-woven base fabric fixed with the stretching film, passing through 15 pairs of cloth guide rollers in the guide roller type steam setting machine in sequence, retracting the stretching film under the action of hot steam, and driving the PTT and PTT/PET mixed fiber non-woven base fabric to form preset number of folds vertical to the longitudinal direction, wherein the process parameters of the heat setting process are as follows: the heat setting time is 8-10min, the heat setting temperature is 105-.
And 107, feeding the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure into a hot air oven to be dried for 3-6min, and stripping the stretched film shrunk on the PTT and PTT/PET mixed fiber non-woven base fabric to obtain the elastic non-woven fabric with folds and with the elongation of 180-200%, wherein the working temperature of the hot air oven is 85-95 ℃.
And 108, preparing the elastic non-woven fabric, the bottom film composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional guard and the surface layer material together to obtain a finished menstrual period trousers, wherein the elastic non-woven fabric is positioned at the whole elastic waistline part of the menstrual period trousers.
In a preferred embodiment, the elastic non-woven fabric, the base film composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional apron and the surface layer material are jointly prepared to obtain a finished menstrual period pants product, which comprises:
(1) the width of the coating is 100mm, and the gram weight is 430g/m2After glue is sprayed, the absorption core body is compounded and compacted with the diversion layer, and the absorption core body coated with the hydrophilic spun-bonded non-woven fabric is cut and molded;
(2) unreeling the basement membrane, spraying glue, and compounding the basement membrane with the bottom non-woven fabric to form basement membrane composite non-woven fabric;
(3) spraying glue on the water-repellent SMS non-woven fabric and the leg rubber band yarn to coat the water-repellent SMS non-woven fabric and the leg rubber band yarn to form a water-repellent SMS non-woven fabric three-dimensional enclosure;
(4) cutting the elastic non-woven fabric into pieces with the width of 860cm, wrapping and sewing the cut elastic non-woven fabric and the basement membrane composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional enclosure and the surface layer material, performing composite compaction, cutting, folding and stacking, counting, bagging and packaging to obtain a menstrual period pants finished product.
In a preferred embodiment, the fiber fineness of the PTT fiber is 1.5-3D, the fiber length is 38-51mm, the fiber structure of the PTT/PET bicomponent fiber is eccentric, the eccentric ratio is 7:3, the fiber fineness is 2-3D, and the fiber length is 40-51 mm.
In a preferred embodiment, the stretched film is an LLDPE film having a thickness of 0.055 to 0.065mm, a tensile strength of 30 to 35MPa in the machine direction and 25 to 30MPa in the transverse direction.
In a preferred embodiment, the surface viscosity of the stretched film is 3.1-2.8N at a stretch ratio of 350-400%.
In a preferred embodiment, for each corrugation on the PTT and PTT/PET mixed fiber nonwoven substrate that has undergone the heat-setting process, the width of the corrugation is 1.2 to 2.2mm, and the arrangement density of the corrugation is 22 to 27 strips/5 cm.
In conclusion, according to the menstrual period pants and the preparation method thereof provided by the invention, through selection of the PTT fiber and the PTT/PET bicomponent fiber, adjustment of opening carding and spunlace reinforcement processes and selection of special contraction and contraction processes, the prepared elastic non-woven fabric has excellent elasticity, and simultaneously has good softness, comfort and breathability, and better safety, the elastic non-woven fabric is used for the waist part of the menstrual period pants, so that the pressure stress surface of the menstrual period pants on the abdomen of a female is larger and more uniform, the compression on the abdomen of the menstrual period female can be avoided, meanwhile, the processing technology of the menstrual period pants is simple, the processing cost is lower, and the menstrual period pants are suitable for sustainable production.
To better illustrate the menstrual pants prepared by the method for preparing the menstrual pants, a schematic view of the menstrual pants provided by the embodiment of the invention is particularly shown as fig. 1, wherein 1 is a menstrual pant body, 2 is an absorbent core, and 3 is an elastic nonwoven integrated elastic ring waist.
Example 2
201, preparing elastic non-woven fabric:
A. selection of raw materials:
selecting PTT fibers, wherein the fiber fineness is 1.5D, and the length is 38 mm; the core-offset PTT/PET bicomponent fiber is selected as the fiber structure, the core-offset ratio is 7:3, the fiber fineness is 2D, and the length is 40 mm.
B. Pretreatment:
mixing PTT fibers and PTT/PET bicomponent fibers to obtain PTT and PTT/PET mixed fibers, wherein the proportion of the PTT fibers to the PTT/PET bicomponent fibers in the PTT and PTT/PET mixed fibers is 70%: 30%, to PTT and PTT/PET mixed fiber spray antistatic liquid to after spraying PTT and PTT/PET mixed fiber stew 4h, make PTT and PTT/PET mixed fiber's moisture regain reach 8.1%, wherein, the ratio of each component is antistatic softener in the antistatic liquid: the water content is 6 percent to 94 percent, and the antistatic softening agent is nonionic.
C. Preparing a non-woven base fabric:
(1) and carrying out the procedures of coarse opening, fine opening, carding and cross lapping on the standing PTT and PTT/PET mixed fibers to obtain a PTT and PTT/PET mixed fiber web, wherein the opening and carding procedure has the following process parameters: the linear speeds of the opening rollers are 550m/min, 750m/min and 900m/min respectively; the speed of the main cylinder is 700m/min, and the speed ratio of the cylinder to the working roll is 10.1: 1, the number of the crossed lapping layers is 2, and the drafting multiple is 1.45 times.
(2) Carrying out spunlace reinforcement on the PTT and PTT/PET mixed fiber web by adopting 3 groups of spunlace heads, wherein the spunlace reinforcement process parameters are as follows: the water jet pressure was 15 bar, 68bar and 100 bar.
(3) Sending the PTT and PTT/PET mixed fiber web subjected to the spunlace reinforcement procedure into a drying room for drying to obtain the mixed fiber web with the gram weight of 50g/m2And the PTT and PTT/PET mixed fiber non-woven base fabric with the thickness of 66.1 mu m and the longitudinal pre-shrinkage of 65 percent is cut into the specification with the width of 1.5m, wherein the process parameters of the drying procedure are as follows: drying by adopting a drying mode combining double groups of drying rollers and rotary screen hot air penetration, wherein the number of each group of drying rollers is 6, the temperature of each drying roller is controlled at 108 ℃, the hot air penetration temperature of the rotary screen is 120 ℃, and the hot air penetration air quantity is controlled at 70000m3H, the drying speed is 40 m/min.
D. And (3) shrinking treatment:
and (2) adopting a stretching film to perform shrinkage treatment, wherein the stretching film is an LLDPE film, the thickness of the LLDPE film is 0.055mm, the longitudinal stretching strength of the LLDPE film is 30MPa, the transverse stretching strength of the LLDPE film is 25MPa, and the surface viscosity of the stretching film is 2.8N when the stretching rate of the stretching film is 400%.
(1) Stretching a stretched film with the width of 2m by 390 percent along the whole width direction, flatly laying the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric, and lightly fixing the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric by adopting a hot roll with a rolling point, wherein the technological parameters of the light fixing process are as follows: the temperature of the hot roller is controlled to be 105 ℃, the surface rolling point of the hot roller is a square small block, and the area of the non-rolling point in the PTT and PTT/PET mixed fiber non-woven base fabric is as follows: the area of the rolled point is 80: 1.
(2) sending the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film into a guide roller type steam setting machine for carrying out a heat setting process, wherein the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film passes through 15 pairs of cloth guide rollers in the guide roller type steam setting machine in an up-and-down passing mode after being wetted and preheated by hot steam, the stretching film retracts under the action of the hot steam, and then the PTT and PTT/PET mixed fiber non-woven base cloth is driven to form preset number of folds vertical to the longitudinal direction, and the process parameters of the heat setting process are as follows: the heat setting time is 8min, the heat setting temperature is 105 ℃, and the heat setting speed is 38 m/min.
(3) And (2) sending the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure into a hot air oven for drying for 3min, stripping the contracted stretching film on the PTT and PTT/PET mixed fiber non-woven base fabric to obtain the elastic non-woven fabric with folds with the elongation of 200%, wherein the working temperature of the hot air oven is 85 ℃, the width of each fold on the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure is 1.2mm, and the arrangement density of the folds is 27 strips/5 cm.
202, preparing female menstrual pants:
(1) the width of the coating is 100mm, and the gram weight is 430g/m2After glue is sprayed, the absorption core body is compounded and compacted with the diversion layer, and the absorption core body coated with the hydrophilic spun-bonded non-woven fabric is cut and molded;
(2) unreeling the basement membrane, spraying glue, and compounding the basement membrane with the bottom non-woven fabric to form basement membrane composite non-woven fabric;
(3) spraying glue on the water-repellent SMS non-woven fabric and the leg rubber band yarn to coat the water-repellent SMS non-woven fabric and the leg rubber band yarn to form a water-repellent SMS non-woven fabric three-dimensional enclosure;
(4) cutting the elastic non-woven fabric into pieces with the width of 860cm, wrapping and sewing the cut elastic non-woven fabric and the basement membrane composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional enclosure and the surface layer material, performing composite compaction, cutting, folding and stacking, counting, bagging and packaging to obtain a menstrual period pants finished product.
Example 3
301, preparing an elastic non-woven fabric:
A. selection of raw materials:
selecting PTT fibers, wherein the fiber fineness is 2D, and the length is 38 mm; the core-offset PTT/PET bicomponent fiber is selected as the fiber structure, the core-offset ratio is 7:3, the fiber fineness is 2D, and the length is 40 mm.
B. Pretreatment:
mixing PTT fibers and PTT/PET bicomponent fibers to obtain PTT and PTT/PET mixed fibers, wherein the proportion of the PTT fibers to the PTT/PET bicomponent fibers in the PTT and PTT/PET mixed fibers is 60%: 40%, to PTT and PTT/PET mixed fiber sprays antistatic liquid to after spraying PTT and PTT/PET mixed fiber stews 5h, makes PTT and PTT/PET mixed fiber's moisture regain reach 9.2%, wherein, the ratio of each component is antistatic softener in the antistatic liquid: 8 percent of water and 92 percent of water, and the antistatic softening agent is nonionic.
C. Preparing a non-woven base fabric:
(1) and carrying out the procedures of coarse opening, fine opening, carding and cross lapping on the standing PTT and PTT/PET mixed fibers to obtain a PTT and PTT/PET mixed fiber web, wherein the opening and carding procedure has the following process parameters: the linear speeds of the opening rollers are 660m/min, 790m/min and 930 m/min respectively; the main cylinder speed is 850 m/min, and the speed ratio of the cylinder to the working roll is 11.4: 1, the number of cross lapping layers is 4, and the drafting multiple is 1.87 times.
(2) Carrying out spunlace reinforcement on the PTT and PTT/PET mixed fiber web by adopting 3 groups of spunlace heads, wherein the spunlace reinforcement process parameters are as follows: the water jet pressure was 20bar, 79bar and 110 bar.
(3) Sending the PTT and PTT/PET mixed fiber web subjected to the spunlace reinforcement procedure into a drying roomThe process is carried out to obtain the product with the gram weight of 58g/m2And PTT/PET mixed fiber non-woven base fabric with the thickness of 70.3 mu m and the longitudinal pre-shrinkage of 54 percent, and cutting the PTT and PTT/PET mixed fiber non-woven base fabric into a specification with the width of 1.5m, wherein the process parameters of the drying procedure are as follows: drying by adopting a drying mode combining double groups of drying rollers and rotary screen hot air penetration, wherein the number of each group of drying rollers is 6, the temperature of each drying roller is controlled at 116 ℃, the hot air penetration temperature of the rotary screen is 128 ℃, and the hot air penetration air quantity is controlled at 70000m3H, the drying speed is 45 m/min.
D. And (3) shrinking treatment:
and (2) performing shrinkage treatment by adopting a stretched film, wherein the stretched film is an LLDPE film, the thickness of the LLDPE film is 0.06mm, the longitudinal tensile strength of the LLDPE film is 32.4MPa, the transverse tensile strength of the LLDPE film is 27MPa, and the surface viscosity of the stretched film is 3N when the stretching rate of the stretched film is 380%.
(1) Stretching a stretched film with the width of 2m by 380 percent along the whole width direction, flatly laying the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric, and lightly fixing the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric by a hot roll with a rolling point, wherein the technological parameters of the light fixing process are as follows: the temperature of the hot roller is controlled at 110 ℃, the rolling point on the surface of the hot roller is a square small block, and the area of the rolling point in the PTT and PTT/PET mixed fiber non-woven base fabric is as follows: the area of the rolled point is 80: 1.
(2) sending the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film into a guide roller type steam setting machine for carrying out a heat setting process, wherein the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film passes through 15 pairs of cloth guide rollers in the guide roller type steam setting machine in an up-and-down passing mode after being wetted and preheated by hot steam, the stretching film retracts under the action of the hot steam, and then the PTT and PTT/PET mixed fiber non-woven base cloth is driven to form preset number of folds vertical to the longitudinal direction, and the process parameters of the heat setting process are as follows: the heat setting time is 9min, the heat setting temperature is 108 ℃, and the heat setting speed is 32 m/min.
(3) And (2) sending the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure into a hot air oven to be dried for 4min, stripping the contracted stretching film on the PTT and PTT/PET mixed fiber non-woven base fabric to obtain the elastic non-woven fabric with folds with the elongation of 190%, wherein the working temperature of the hot air oven is 90 ℃, the width of each fold on the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure is 1.8mm, and the arrangement density of the folds is 24 strips/5 cm.
302, preparing female menstrual pants:
(1) the width of the coating is 100mm, and the gram weight is 430g/m2After glue is sprayed, the absorption core body is compounded and compacted with the diversion layer, and the absorption core body coated with the hydrophilic spun-bonded non-woven fabric is cut and molded;
(2) unreeling the basement membrane, spraying glue, and compounding the basement membrane with the bottom non-woven fabric to form basement membrane composite non-woven fabric;
(3) spraying glue on the water-repellent SMS non-woven fabric and the leg rubber band yarn to coat the water-repellent SMS non-woven fabric and the leg rubber band yarn to form a water-repellent SMS non-woven fabric three-dimensional enclosure;
(4) cutting the elastic non-woven fabric into pieces with the width of 860cm, wrapping and sewing the cut elastic non-woven fabric and the basement membrane composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional enclosure and the surface layer material, performing composite compaction, cutting, folding and stacking, counting, bagging and packaging to obtain a menstrual period pants finished product.
Example 4
401, preparing an elastic non-woven fabric:
A. selection of raw materials:
selecting PTT fibers, wherein the fiber fineness is 3D, and the length is 51 mm; the core-offset PTT/PET bicomponent fiber is selected as the fiber structure, the core-offset ratio is 7:3, the fiber fineness is 3D, and the length is 51 mm.
B. Pretreatment:
mixing PTT fibers and PTT/PET bicomponent fibers to obtain PTT and PTT/PET mixed fibers, wherein the proportion of the PTT fibers to the PTT/PET bicomponent fibers in the PTT and PTT/PET mixed fibers is 50%: 50% to PTT and PTT/PET mixed fiber sprays antistatic liquid, and will spray after PTT and PTT/PET mixed fiber stews for 6h, makes PTT and PTT/PET mixed fiber's moisture regain reach 10.2%, wherein, the ratio of each component is antistatic softener in the antistatic liquid: the water accounts for 10 percent to 94 percent, and the antistatic softening agent is nonionic.
C. Preparing a non-woven base fabric:
(1) and carrying out the procedures of coarse opening, fine opening, carding and cross lapping on the standing PTT and PTT/PET mixed fibers to obtain a PTT and PTT/PET mixed fiber web, wherein the opening and carding procedure has the following process parameters: the linear speeds of the opening roller are 730m/min, 850 m/min and 950 m/min respectively; the main cylinder speed is 920 m/min, and the speed ratio of the cylinder to the working roll is 13.5: 1, the number of cross lapping layers is 4, and the drafting multiple is 2.10 times.
(2) Carrying out spunlace reinforcement on the PTT and PTT/PET mixed fiber web by adopting 3 groups of spunlace heads, wherein the spunlace reinforcement process parameters are as follows: the water-jet pressure is 35bar, 90bar and 120bar respectively.
(3) Sending the PTT and PTT/PET mixed fiber web subjected to the spunlace reinforcement procedure into a drying room for drying to obtain the PTT and PTT/PET mixed fiber web with the gram weight of 65g/m2And cutting the PTT and PTT/PET mixed fiber non-woven base fabric into a specification with the width of 1.5m, wherein the thickness of the PTT and PTT/PET mixed fiber non-woven base fabric is 75 mu m, and the longitudinal pre-shrinkage rate of the PTT and PTT/PET mixed fiber non-woven base fabric is 40%, and the process parameters of the drying procedure are as follows: drying by adopting a drying mode combining double groups of drying rollers and rotary screen hot air penetration, wherein the number of each group of drying rollers is 6, the temperature of each drying roller is controlled at 130 ℃, the hot air penetration temperature of the rotary screen is 135 ℃, and the hot air penetration air quantity is controlled at 80000m3H, the drying speed is 50 m/min.
D. And (3) shrinking treatment:
and (2) performing shrinkage treatment by adopting a stretched film, wherein the stretched film is an LLDPE film, the thickness of the LLDPE film is 0.065mm, the longitudinal tensile strength of the LLDPE film is 35MPa, the transverse tensile strength of the LLDPE film is 30MPa, and the surface viscosity of the stretched film is 2.8N when the stretching rate of the stretched film is 400%.
(1) Stretching a stretched film with the width of 2m by 360 percent along the whole width direction, tiling the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric, and lightly fixing the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric by adopting a hot roll with a rolling point, wherein the technological parameters of the light fixing process are as follows: the temperature of the hot roller is controlled at 115 ℃, the surface roll points of the hot roller are square small blocks, and the area of the roll points in the PTT and PTT/PET mixed fiber non-woven base fabric is as follows: the area of the rolled point is 80: 1.
(2) sending the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film into a guide roller type steam setting machine for carrying out a heat setting process, wherein the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film passes through 15 pairs of cloth guide rollers in the guide roller type steam setting machine in an up-and-down passing mode after being wetted and preheated by hot steam, the stretching film retracts under the action of the hot steam, and then the PTT and PTT/PET mixed fiber non-woven base cloth is driven to form preset number of folds vertical to the longitudinal direction, and the process parameters of the heat setting process are as follows: the heat setting time is 10min, the heat setting temperature is 110 ℃, and the heat setting speed is 38 m/min.
(3) And (2) sending the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure into a hot air oven for drying for 6min, stripping the contracted stretching film on the PTT and PTT/PET mixed fiber non-woven base fabric to obtain the elastic non-woven fabric with folds with the elongation of 180%, wherein the working temperature of the hot air oven is 95 ℃, the width of each fold on the PTT and PTT/PET mixed fiber non-woven base fabric subjected to the heat setting procedure is 2.2mm, and the arrangement density of the folds is 22 strips/5 cm.
402, preparing female menstrual pants:
(1) coating with hydrophilic spun-bonded nonwoven fabric 100mm and gram weight of 430g/m2After the absorption core body is manufactured, spraying glue on the flow guide layer, compounding and compacting, and cutting and molding the absorption core body coated with the hydrophilic spun-bonded non-woven fabric;
(2) unreeling the basement membrane, spraying glue, and compounding the basement membrane with the bottom non-woven fabric to form basement membrane composite non-woven fabric; (ii) a
(3) Spraying glue on the water-repellent SMS non-woven fabric and the leg rubber band yarn to coat the water-repellent SMS non-woven fabric and the leg rubber band yarn to form a water-repellent SMS non-woven fabric three-dimensional enclosure;
(4) cutting the elastic non-woven fabric into pieces with the width of 860cm, wrapping and sewing the cut elastic non-woven fabric and the basement membrane composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional enclosure and the surface layer material, performing composite compaction, cutting, folding and stacking, counting, bagging and packaging to obtain a menstrual period pants finished product.
The elastic elongation, air permeability, moisture permeability, softness and thickness of the elastic nonwoven fabric of the whole elastic waist portion of the menstrual pants prepared in examples 2 to 4 were measured, and the results are shown in table 1. The test method adopted is as follows:
(1) thickness of
The thickness of the model YG (B) 141D digital fabric thickness gauge was used, and the test method was carried out according to GB/T3820-1997 standard.
(2) Moisture permeability
And testing by adopting an LCK-131 fabric moisture permeability tester according to the standard GB/T12704.2-2009.
(3) Air permeability
The YG461D digital fabric air permeameter was used and the test method was performed according to GB/T5453-1997 standard.
(4) Flexibility:
the bending tester FB2 in the KES-F fabric stylizer system is used for testing, the bending rigidity is used as an index for measuring the flexibility of the base cloth, and the base cloth is more flexible when the bending rigidity is smaller. The test specimen was 200 mm. times.200 mm in size.
(5) Elastic elongation
Cutting the elastic non-woven fabric into a rectangular cloth sample with the width of 5cm and the length of 10cm, stretching the rectangular cloth sample by adopting a YG026H-50 electronic fabric strength machine according to a test method of GB/T453-2002 standard, keeping the length for 30min, and testing the length of the rectangular cloth sample, wherein the elastic elongation is as follows: (length after stretching of the cloth-unstretched length)/unstretched length 100%.
Table 1: test results of elastic nonwoven Fabric Performance
Figure 669567DEST_PATH_IMAGE002
As can be seen from table 1, the elastic nonwoven fabric at the whole elastic waist portion of the menstrual pants prepared in examples 2 to 4 is more prominent in the aspects of air permeability, moisture permeability, softness, thickness and other properties than the elastic waist portion of the infant menstrual pants sold in the market at present, and is comparable to the elastic nonwoven fabric in the aspect of elastic properties, mainly because a single-layer spunlace nonwoven fabric is adopted as a base material, the glue spraying composite processing on a diaper machine is omitted, the gram weight is light, no chemical addition is needed, the overall equipment investment is reduced, the processing flow is shortened, the energy is saved, the consumption is reduced, and the diaper is really a green and environment-friendly product; the elastic non-woven fabric is used for the waistline part of the menstrual period trousers, so that the pressure stress surface of the menstrual period trousers on the abdomen of a woman is larger, the stress is more uniform, the compression on the abdomen of the menstrual period woman can be avoided, and meanwhile, the processing technology of the menstrual period trousers is simple, the processing cost is lower, and the menstrual period trousers are suitable for sustainable production.
While the invention has been described in detail in the foregoing by way of general description, and specific embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof.

Claims (6)

1. A method of making menstrual pants, the method comprising:
mixing PTT fibers and PTT/PET bicomponent fibers to obtain PTT and PTT/PET mixed fibers, wherein the proportion of the PTT fibers to the PTT/PET bicomponent fibers in the PTT and PTT/PET mixed fibers is 50-70%: 30-50%, spraying antistatic liquid to the PTT and PTT/PET mixed fiber, and standing the sprayed PTT and PTT/PET mixed fiber for 4-6h to enable the moisture regain of the PTT and PTT/PET mixed fiber to reach 8.1-10.2%, wherein the antistatic liquid comprises the following components in percentage by weight: water in 6-10 wt% and water in 90-94 wt%, and the antistatic softening agent is non-ionic;
and (3) carrying out three opening, carding and cross lapping procedures on the standing PTT and PTT/PET mixed fibers to obtain a PTT and PTT/PET mixed fiber web, wherein the three opening, carding and cross lapping procedures have the following process parameters: the linear speeds of the three opening rollers are 550-730m/min, 750-850 m/min and 900-950 m/min respectively; the main cylinder speed is 700-920 m/min, the speed ratio of the cylinder to the working roll is 10.1-13.5: 1, the number of the cross lapping layers is 2-4, and the drafting multiple is 1.45-2.10 times;
carrying out spunlace reinforcement on the PTT and PTT/PET mixed fiber web by adopting 3 groups of spunlace heads, wherein the spunlace reinforcement process parameters are as follows: the water-jet pressure is respectively 15-35bar, 68-90bar and 100-120 bar;
sending the PTT and PTT/PET mixed fiber web subjected to the spunlace reinforcement procedure into a drying room for drying to obtain the PTT and PTT/PET mixed fiber web with the gram weight of 50-65g/m2PTT and PTT/PET mixed fiber non-woven base fabric with the thickness of 66.1-75 mu m and the longitudinal pre-shrinkage of 40-65%, and the PTT and PTT/PET mixed fiber non-woven base fabric is cut into the specification with the width of 1.5m, wherein the process parameters of the drying procedure are as follows: drying by adopting a drying mode combining double groups of drying rollers and rotary screen hot air penetration, wherein the number of each group of drying rollers is 6, the temperature of each drying roller is controlled to be 108-DEG C130 DEG, the hot air penetration temperature of the rotary screen is 120-DEG C135 DEG, and the hot air penetration air quantity is controlled to be 70000-DEG C80000 m3H, the drying speed is 40-50 m/min;
stretching a stretching film with the width of 2m for 360-390 percent along the whole width direction, flatly laying the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric, fixing the stretched film on the cut PTT and PTT/PET mixed fiber non-woven base fabric by a hot roll with a rolling point, wherein the technological parameters of the fixing process are as follows: the temperature of the hot roller is controlled to be 105-115 ℃, the surface roll point of the hot roller is a square small block, and the area of the roll point in the PTT and PTT/PET mixed fiber non-woven base fabric is as follows: the area of the rolled point is 80: 1;
sending the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film into a guide roller type steam setting machine for carrying out a heat setting procedure, wherein the PTT and PTT/PET mixed fiber non-woven base cloth fixed with the stretching film is preheated by hot steam, and then sequentially passes through 15 pairs of cloth guide rollers in the guide roller type steam setting machine, under the action of the hot steam, the stretching film retracts, and further the PTT and PTT/PET mixed fiber non-woven base cloth is driven to form preset number of folds vertical to the longitudinal direction, and the process parameters of the heat setting procedure are as follows: the heat setting time is 8-10min, the heat setting temperature is 105-;
sending the PTT and PTT/PET mixed fiber non-woven base cloth subjected to the heat setting procedure into a hot air oven to be dried for 3-6min, and stripping the stretched film shrunk on the PTT and PTT/PET mixed fiber non-woven base cloth to obtain the elastic non-woven cloth with folds and with the elongation of 180-200%, wherein the working temperature of the hot air oven is 85-95 ℃;
and (3) preparing the elastic non-woven fabric, the bottom film composite non-woven fabric, the water-repellent SMS non-woven fabric three-dimensional protection and the surface layer material together to obtain a finished menstrual period trousers, wherein the elastic non-woven fabric is positioned at the whole waistline part of the menstrual period trousers.
2. The method as claimed in claim 1, wherein the PTT fiber has a fiber fineness of 1.5-3D and a fiber length of 38-51mm, and the PTT/PET bicomponent fiber has a fiber structure of an eccentric type with an eccentric ratio of 7:3, a fiber fineness of 2-3D and a fiber length of 40-51 mm.
3. The method of claim 1, wherein the stretched film is an LLDPE film having a thickness of 0.055 to 0.065mm, a tensile strength in the machine direction of 30 to 35MPa, and a tensile strength in the transverse direction of 25 to 30 MPa.
4. The method as claimed in claim 3, wherein the surface tackiness of the stretched film is 3.1 to 2.8N at a stretch ratio of 350-400%.
5. The method of claim 1, wherein for each pleat in the PTT and PTT/PET mixed fiber nonwoven substrate that is subjected to the heat-setting process, the width of the pleat is 1.2-2.2mm, and the density of the pleats is 22-27 strips/5 cm.
6. Menstrual pants produced by the method of making menstrual pants according to any one of claims 1 to 5.
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