CN112391735A

CN112391735A - Non-woven fabric for cosmetics

Info

Publication number: CN112391735A
Application number: CN201910763121.4A
Authority: CN
Inventors: 高冬燕; 张磊; 吴蓓蓓
Original assignee: Toray Fibers and Textiles Research Laboratories China Co Ltd
Current assignee: Toray Fibers and Textiles Research Laboratories China Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2021-02-23

Abstract

The invention discloses a non-woven fabric for cosmetics, which contains nano fibers with the average diameter of 100-450 nm and profiled cross-section fibers with the actual heart rate of 40-75%. The non-woven fabric for cosmetics has the characteristics of excellent skin-adhering softness, high adherence and good liquid medicine retention.

Description

Non-woven fabric for cosmetics

Technical Field

The invention relates to a non-woven fabric for cosmetics.

Background

With the improvement of living standard and the acceleration of life rhythm, people have higher and higher requirements on various sanitary skin care products, and particularly, various membrane cloths for skin care are concerned by people. While various functional essence improvement formulas are pursued, the performance of the membrane cloth material used as an essence carrier is more and more emphasized. The skin-care film cloth material is gradually developing towards a direction of being more close to skin and close, soft in hand feeling and good in liquid absorption and retention.

However, most nonwoven fabric materials on the market at present are nonwoven fabric structures formed of common tencel, all-cotton common fiber, chemical fiber type microfiber, and the like, and have poor liquid medicine retention, and it is difficult to sufficiently exert the efficacy of the film cloth as a cosmetic liquid carrier. Further, the grammage of the nonwoven fabric material is increased in order to improve the water holding capacity, but the increase in grammage inevitably results in deterioration of the softness of the nonwoven fabric material, and a heavy and unpleasant feeling when the nonwoven fabric material is used by a user. Therefore, in order to improve the flexibility of the nonwoven fabric material, a nonwoven fabric formed of a fiber base material having a modified cross section such as a triangular, Y-shaped, double cross-shaped, or flat shape is used as the film cloth for cosmetics, and although the flexibility of the film cloth can be improved, the adhesion of the film cloth is deteriorated.

For example, chinese patent publication CN106074208A discloses a trilobal, Y-shaped, double-cross shaped profiled fiber nonwoven fabric or a nonwoven fabric formed by mixing a round fiber nonwoven fabric and a profiled fiber nonwoven fabric, which can absorb more nutrient solution and provide better skin texture, but because some superfine fibers with larger cross-sectional area are not used, the adhesion of the obtained nonwoven fabric cannot be improved, and the requirement of high adhesion of a high-end cosmetic film cloth cannot be satisfied.

Further, as disclosed in chinese patent publication CN101010017A, a cosmetic film cloth made of split-type ultrafine fibers and hydrophilic fibers is disclosed, and although the use of split-type ultrafine fibers improves the adherence of the base cloth to some extent, the split-type ultrafine fibers do not reach a fineness of nanometer level, and the adherence is not improved particularly much, and the softness of the base cloth cannot be improved by using conventional fibers, and the skin feel of high softness which is being sought by customers is not satisfied.

Disclosure of Invention

The invention aims to provide a non-woven fabric for cosmetics, which has excellent skin-adhering softness, high adherence and good liquid medicine retention.

The technical solution of the invention is as follows: the non-woven fabric for cosmetics at least contains nano fibers with the average diameter of 100-450 nm and profiled cross-section fibers with the actual heart rate of 40-75%.

The nonwoven fabric preferably contains 20 to 40 wt% of hydrophilic fibers.

The content of the nanofibers is preferably 15 to 50 wt%, and the content of the profiled cross-section fibers is preferably 30 to 50 wt%.

The cross-sectional shape of the profiled fiber is preferably a cross.

The preferred bending angle of the leaf shape of the cross-shaped section fiber is 100-160 ℃.

The length-diameter ratio of the cross-shaped section fibers is preferably 1.0-1.5.

The cross-sectional area of the profiled cross-sectional fiber is preferably 80 to 200 μm²。

The thickness of the nonwoven fabric is preferably 0.5mm or less.

The strength of the nonwoven fabric in the warp direction is preferably 80N/50mm or more, and the strength in the weft direction is preferably 50N/50mm or more.

The liquid absorption rate of the nonwoven fabric for cosmetics of the present invention is preferably 800% or more.

The stress at 10% elongation in the weft direction of the nonwoven fabric for cosmetics of the present invention is preferably 2.0N/50mm or less.

The static friction force of the nonwoven fabric for cosmetic preparations of the present invention in a wet state is preferably 0.4 or more.

The invention has the beneficial effects that: the invention adopts the perfect combination of the nano fiber with a certain average diameter and the special-shaped cross section fiber with a special structure, and the formed non-woven fabric has the characteristics of high adherence, excellent skin-adhering softness, good liquid medicine retention, light weight and high strength.

Drawings

FIG. 1 is a schematic cross-sectional structure of a cruciform cross-section fiber of the present invention. Wherein R is the major diameter of the fiber with the cross-shaped section, R is the minor diameter of the fiber with the cross-shaped section, A₀Is the actual area, A, of the cross-section of the fibre₁The area of the periphery of the cross section of the fiber is cross section.

Detailed Description

The non-woven fabric for cosmetics at least contains nano fibers with the average diameter of 100-450 nm and profiled cross-section fibers with the actual heart rate of 40-75%. The nano-fiber of the invention can be prepared by electrostatic spinning, sea-island fiber after carding, spunlacing, fiber opening, web forming and reinforcing, and then sea-removing and fiber opening treatment, or other processing methods, such as catalytic extrusion polymerization processing method. In consideration of the economical efficiency of processing the product and the uniform fineness and stability of the nanofibers in the product, the nanofibers of the present invention are preferably prepared by subjecting the sea-island fibers to carding, spunlacing, and opening processes. The nano fiber has extremely fine fiber diameter, the surface energy is very large, and the adsorption to water molecules is very strong, so that the product has good water retention performance, and the non-woven fabric prepared from the nano fiber with extremely fine fineness has extremely high static friction performance in a wet state, so that the non-woven fabric has excellent adhesion when in use. The average diameter of the nanofibers is required to be controlled within a certain range, the diameter of the nanofibers is 100-450 nm, if the average diameter of the nanofibers is larger than 450nm, the number of fibers per unit area is greatly reduced, the total specific surface area of the obtained nanofiber layer is greatly reduced, and the adherence, the liquid medicine retention, the water retention and the static friction performance of the processed non-woven fabric for cosmetics are remarkably reduced; if the average diameter of the nano-fibers is less than 100nm, the strength of the prepared non-woven fabric is extremely low, which is not beneficial to the subsequent processing procedure of the non-woven fabric, and meanwhile, if the diameter of the nano-fibers is extremely fine, the surface of the non-woven fabric is easy to disperse to generate hairiness and dust, which also affects the appearance and the service performance of the product. The average diameter of the nanofibers is preferably 200 to 300nm in consideration of the balance between liquid absorption and strength of the product, appearance, and workability.

The component of the nanofiber of the present invention is preferably a polyamide fiber, a polyester fiber, a polylactic acid fiber, a polyethylene fiber or a polypropylene fiber. Among them, the polyamide fiber is more preferably a component of the nanofiber, because the nanocrystallization production of the polyamide fiber is easier and the liquid absorption performance is good.

The non-woven fabric for cosmetics contains fibers with special-shaped cross sections, and the solid content of the fibers with special-shaped cross sections is 40-75%. Because the special-shaped cross section fiber has deeper grooves, the specific surface area of the fiber is increased, more water can be stored in the grooves,when such fibers are processed into a nonwoven fabric, the water retention of the resulting nonwoven fabric is greatly improved, and when fibers having a circular cross section are used, the nonwoven fabric has a low processing cost and a stable strength, but the nonwoven fabric having a circular cross section has a general softness and a poor water retention. In addition, because the surface of the profiled cross section fiber is provided with the grooves, the fiber and the fiber can be better interlaced in the spunlace process, so that the strength of the obtained non-woven fabric is higher, the fiber and the fiber can be interlaced tightly and compactly, the non-woven fabric can be lighter and thinner, the non-woven fabric can meet the light and thin feeling liked by the public as the non-woven fabric for cosmetics, and the user does not feel burdened when using the non-woven fabric. The solid rate of the profiled cross-section fiber is 40-75%, and the calculation formula of the real heart rate is as follows: phi = A₀/A₁，A₀Is the actual area of the cross-section of the fibre, A₁Is the area around the circumference of the cross-section of the fiber. The lower the solid content of the profiled cross-section fiber, the deeper the surface grooves, the better the liquid absorption of the nonwoven fabric made from the fiber, and if the solid content of the profiled cross-section fiber is less than 40%, the spinning spinneret is thin and the spinning process is easily blocked, so the fiber spinning process is extremely difficult. When the non-woven fabric is processed, the fiber is too thin and soft, neps are easy to generate, and the processing is difficult; if the solid rate of the profiled cross section fiber is more than 75%, the surface grooves are shallow, the cross section is approximately circular, the fiber can not lock water, on the other hand, the fiber which is approximately circular in cross section has larger stress when bending and is not easy to bend, and after the fiber is processed into the non-woven fabric, the water retention property and the softness of the obtained non-woven fabric are greatly reduced. The percentage of solids of the irregularly shaped cross-section fibers is preferably 50 to 65% in view of liquid absorbency, softness, and processability of the nonwoven fabric for cosmetic use.

The profiled cross-section fibers are preferably flat, multi-lobal, zigzag, cross-shaped or m-shaped, and have lower surface stress and are more easily bent than circular cross-section fibers, and when the fibers are used for processing the non-woven fabric, the fibers are softer, so that the fibers are more tightly entangled, the processed non-woven fabric is lighter and thinner, the softness is also high, and the grooves formed among the profiled cross-section fibers of the processed non-woven fabric can store more water. In view of the softness, water retention property, light and thin transparency of the nonwoven fabric for cosmetics of the present invention, the irregularly shaped cross-section fibers are more preferably cross-shaped fibers.

The non-woven fabric for cosmetics of the present invention may have a laminated structure or a single-layer structure of a mixed fiber. When the nonwoven fabric for cosmetics is a laminated fabric structure, in order to sufficiently exert the adhesion of nanofibers and the flexibility and water retention of fibers having a profiled cross section, the laminated fabric structure is preferably a three-layer structure in which the surface layer of the laminated fabric is a nanofiber layer and the intermediate layer is a profiled cross section fiber layer or a mixed layer of fibers having a profiled cross section and other fibers. When the non-woven fabric for cosmetics is of a single-layer structure of mixed fibers, the single-layer structure is formed by the processes of opening, mixing, opening, carding, lapping, spunlacing, sea removal and the like of the nano fibers and the fibers with the special-shaped cross sections. Although the adhesion of the nonwoven fabric having a single-layer structure is slightly lower than that of the nonwoven fabric having a laminate structure, the single-layer structure is easier to process and the processing cost is relatively low in view of processability. In view of high adhesion and high water retentivity of the nonwoven fabric for cosmetics, a laminated fabric structure is preferable; in view of cost, a single-layer structure of the hybrid fiber is preferable.

In order to improve the water absorption performance of the non-woven fabric, the non-woven fabric preferably contains 20-40% of hydrophilic fibers, wherein the hydrophilic fibers can be natural fibers such as cotton, hemp and silk, regenerated cellulose fibers such as viscose, tencel, modal, milk fibers, soybean fibers and bamboo fibers, and water-absorbing chemical fibers such as polyamide and polyacrylonitrile. The hydrophilic fiber is preferably a regenerated cellulose fiber in view of processability, cost and water absorption property. If the content of the hydrophilic fiber is too low, the processed non-woven fabric has poor hydrophilic performance, and when the non-woven fabric is used as a facial mask, essence cannot easily permeate membrane cloth, the essence absorbed by the membrane cloth is reduced, and the non-woven fabric is easy to dry when in use; if the content of the hydrophilic fiber is too high, the ratio of the nanofiber to the fiber with the irregular cross section is reduced, the adherence and softness of the obtained non-woven fabric are reduced, the interlacing before the fiber is slightly poor, the thickness of the obtained non-woven fabric is higher, the strength is reduced, the non-woven fabric has a heavy feeling when being used as a mask fabric, the non-woven fabric is easy to tear when being stretched, and the non-woven fabric is easy to dry when being used and cannot achieve the effect of lifting. In consideration of the overall properties of the nonwoven fabric, such as adhesion, water retention, and softness, the nonwoven fabric of the present invention preferably contains 25 to 35% of hydrophilic fibers.

The content of the nanofiber is preferably 15-50 wt%, and the content of the profiled cross-section fiber is preferably 30-50 wt%. If the content of the nanofibers is too low, the resulting nonwoven fabric has poor adhesion and is liable to drop off during use, and the nanofibers decrease, and the specific surface area of the fibers decreases, the surface energy decreases, the adsorption to water molecules decreases, and the resulting nonwoven fabric has poor liquid absorbency and poor chemical retention; if the content of the nanofibers is too high, the base fabric becomes hard and the skin feel is poor when the nonwoven fabric made of the bundle-like nanofibers is directly attached to the skin, and if the proportion of the nanofibers is too high, the proportion of other fibers having a main strong supporting function is reduced, and the strength of the nonwoven fabric thus formed is greatly reduced. If the content of the profiled cross-section fibers is too low, the proportion of the bundle-shaped nanofibers to the common hydrophilic fibers is increased, the adhesion and the hydrophilic performance of the obtained non-woven fabric can be improved to a certain extent, but the softness and the water retention performance of the non-woven fabric are deteriorated, the profiled cross-section fibers are reduced, the interlacing performance among the fibers is reduced, the thickness of the formed non-woven fabric is thicker, the strength is reduced, the non-woven fabric has a heavy feeling when being used as a mask fabric, and the non-woven fabric is easy to tear when being stretched; if the content of the irregular cross-section fibers is too high, the ratio of the nanofibers to the hydrophilic fibers is lowered, and the resulting nonwoven fabric has improved softness and water retention, but the adhesion is lowered, and the lifting effect required for a high-end cosmetic film is poor. In consideration of the balance among the adhesion, softness, strength and thickness of the nonwoven fabric, the content of the nanofibers is more preferably 25 to 40 wt%, and the content of the profiled cross-section fibers is more preferably 35 to 45 wt%.

The preferred bending angle of the leaf shape of the cross-shaped section fiber is 100-160 ℃. If the leaf-shaped bending angle of the cross-shaped section fiber is too small, the grooves on the fiber surface are shallow, the liquid retention capability of the obtained non-woven fabric is poor, when the non-woven fabric is applied to a film cloth for cosmetics such as a facial mask, the liquid absorption rate of essence is low, the liquid medicine retention is low during use, and the non-woven fabric is easy to dry. Moreover, the cross-section fiber has a too small leaf-shaped bending angle, the cross-section of the fiber is close to a circle, the bending stress of the round-section fiber is larger than that of the profiled-section fiber, when the fiber is combined with the bundle-shaped nanofiber, the prepared nonwoven fabric is harder and has poor hand feeling, and the entanglement among the fibers is weakened, so that the strength of the obtained nonwoven fabric is reduced; if the bending angle of the leaf shape of the cross-shaped section fiber is too large, the processing difficulty of the fiber is increased, the fiber may form a tapered edge angle, the formed non-woven fabric is seriously fibrillated, and the surface of the non-woven fabric is easy to generate fuzzing. In consideration of the water retention property, processability and appearance property of the nonwoven fabric, the cross-section fiber of the present invention has a more preferable leaf-shaped bending angle of 120 to 140 ℃.

The length-diameter ratio of the cross-shaped section fibers is preferably 1.0-1.5. If the fibrous length to diameter ratio of cross-shaped cross section is too big, the slot on fibrous surface can diminish on the one hand, and the water retention ability of the non-woven fabrics of formation worsens, and the compliance also can reduce, and on the other hand the fibre processing degree of difficulty can increase relatively, is difficult to obtain regular, even fibre, and carding nature also can worsen when processing the non-woven fabrics, and the performance such as the non-woven fabrics brute force that obtains is also inhomogeneous, and the non-woven fabrics rigidity that the fibre of rectangular shape obtained is high, and it also can harden to feel. In view of the water-retaining, flexible and processable properties of the nonwoven fabric, the aspect ratio of the cross-sectional fibers in the present invention is more preferably 1.0 to 1.2.

The cross-sectional area of the profiled cross-section fiber is preferably 80-200 mu m²If the cross-sectional area of the fibers with the special-shaped cross sections is too large, the fibers are too thick, the hand feeling of the processed non-woven fabric is hard, or if the fibers are the same thick and thin, grooves of the fibers are shallow, on one hand, moisture is not easy to store in the shallow grooves, on the other hand, the stored moisture is easy to flow out and cannot be stored due to the shallow grooves, the water-retaining property of the formed non-woven fabric is reduced, and the non-woven fabric is easy to dry when being used as a mask; special-shaped cutterIf the cross-sectional area of the face fiber is too small, the fiber becomes too thin, which makes processing of the fiber difficult, and when a nonwoven fabric is processed, neps are likely to be generated, which deteriorates the appearance of the nonwoven fabric and makes processing difficult. Considering the hand feeling, water retention property and processability of the non-woven fabric, the cross-sectional area of the profiled cross-section fiber is more preferably 120-160 mu m²。

The thickness of the nonwoven fabric for cosmetics of the present invention is preferably 0.5mm or less. If the thickness of the nonwoven fabric is too high, the nonwoven fabric gives a strong feeling of thickness when used as a cosmetic film, and is air-impermeable, stuffy, and thus, there is no selling point for a cosmetic film which is required to be light, thin and transparent. Compared with the common round-section fiber, the irregular-section fiber with the real heart rate of 40-75% is adopted, and the spunlace method is further adopted, so that the irregular-section fiber is more tightly interlaced with the sea-island fiber and other fibers, a thinner non-woven fabric is obtained, and meanwhile, the strength of the non-woven fabric can be greatly improved.

The warp strength of the nonwoven fabric for cosmetic preparations of the present invention is preferably 80N/50mm or more, and the weft strength is preferably 50N/50mm or more. The higher the strength of the non-woven fabric, the better the operability when used as a mask cloth, if the warp and weft strength of the non-woven fabric is too low, the non-woven fabric needs to be additionally added with lining cloth such as a pearlized film when used as the mask cloth, so that the cost is increased, the bag is not easy to enter when packaged on the other hand, and the user is easy to tear when opening the non-woven fabric. The invention adopts the special-shaped cross-section fiber and the nano-fiber with special structures, the fibers are better entangled when being processed by the actions of water jet and the like, and the obtained non-woven fabric is light, thin and transparent and has higher strength.

The non-woven fabric for cosmetics has the liquid absorption rate of over 800 percent, and the nano-fibers have ultrahigh specific surface area and the fibers with the special-shaped cross sections are provided with grooves, so that enough space is formed among the fibers of the formed non-woven fabric to store more essence. Therefore, the liquid absorption rate of the nonwoven fabric of the present invention is preferably 800% or more, and the nonwoven fabric can lock the chemical between the fibers and the grooves of the fibers after liquid absorption, and the retention rate of the chemical can be greatly improved.

The stress at 10% elongation in the weft direction of the nonwoven fabric for cosmetics of the present invention is preferably 2.0N/50mm or less. The stress response when the weft direction is stretched by 10 percent is the softness and the easy-to-pull elongation of the non-woven fabric. If the stress when the cosmetic non-woven fabric is stretched in the weft direction by 10 percent is too high, the rigidity of the non-woven fabric is high, the hand feeling is hard, and when the cosmetic non-woven fabric is used, the weft direction is not easy to stretch, so that the effect of pulling and tightening the cosmetic non-woven fabric is difficult to ensure. In view of this, the stress at 10% elongation in the weft direction of the cosmetic nonwoven fabric of the present invention is more preferably 1.5N/50mm or less.

The nonwoven fabric for cosmetic preparations of the present invention preferably has a static friction coefficient of 0.4 or more in a wet state. The static friction coefficient in a wet state reflects the skin-adhering property of the nonwoven fabric, and the higher the static friction coefficient is, the better the skin-adhering property of the nonwoven fabric for cosmetics is. If the static friction coefficient of the non-woven fabric for cosmetics in a wet state is too low, the non-woven fabric is easy to fall off when being used as a film cloth for sticking skin, and the effect of lifting and tightening can be greatly reduced. The invention adopts the nano fiber with ultrahigh specific surface area and the special-shaped cross section fiber with grooves, so that the obtained non-woven fabric has high adherence and high lifting effect as a film cloth for cosmetics. In view of this, the static friction coefficient of the nonwoven fabric for cosmetic preparations of the present invention in a wet state is more preferably 0.8 or more.

The present invention is further illustrated by the following examples, but the scope of the present invention is not limited to the examples, and the physical property parameters in the examples are measured by the following methods.

[ solidity of fiber with irregular cross section ]

Taking an electron microscope image of the profiled fiber in the non-woven fabric at a magnification of 1500 times, and respectively measuring the actual area A of the profiled fiber section₀And the area A around the circumference of the fiber section with the irregular section₁At 50, the average value was determined at random. The calculation formula of the real heart rate of the profiled cross-section fiber is as follows: phi = A₀/A₁。

[ leaf-shaped bending angle of cruciform-section fiber ]

The cross-shaped section fiber in the non-woven fabric is shot by an electron microscope, the shooting magnification is 1500 times, the leaf-shaped bending angle of the cross-shaped section fiber is directly measured, 50 positions are randomly measured, and the average value of the results is calculated.

[ Length/diameter ratio of crisscross section fiber ]

The cross-shaped section fiber in the non-woven fabric is shot by an electron microscope, the shooting magnification is 1500 times, the long diameter R and the short diameter R of the cross-shaped section fiber are respectively measured, 50 positions are randomly measured, and then the average value of the results is calculated. The length-diameter ratio of the cross-shaped section fiber is calculated by the following formula: s = R/R.

[ Cross-sectional area of fiber with irregular Cross-section ]

The irregular section fibers in the non-woven fabric are shot by an electron microscope, the shooting multiplying power is 1500 times, the section area of the fibers is directly measured, 50 positions are randomly measured, and then the average value of the results is calculated.

[ average diameter of nanofiber ]

The average diameter of the nanofibers was photographed by an SEM electron microscope at a magnification of 3000 times, and the average of the results was calculated at 50 positions by random measurement.

[ thickness of nonwoven Fabric ]

The humidity was adjusted at 20. + -. 2 ℃ X65. + -. 4% in a laboratory for 24 hours, and then measured by a thickness meter. Testing equipment: TECCLOCK PG-11, measuring sub-area 10cm²And a measurement pressure of 3.7gf/cm²And sampling position: three positions of the left, the center and the right of the base cloth are respectively taken 3 pieces, each piece of sample is tested for 3 thicknesses, and then the average value is calculated.

[ gram weight ]

Measured according to JIS L1096, sample size: 200mm × 200mm, sampling position: three samples, namely the left, the center and the right, are respectively taken 3, and after the humidity is adjusted for 24 hours in a laboratory at 20 +/-2 ℃ multiplied by 65 +/-4%, the gram weight of the 3 samples is respectively tested by an electronic balance, and the average value is calculated.

[ liquid absorption rate ]

Weighing the sample piece 10cm × 10cm to obtain a sample piece weight M₁Then placing the sample piece into pure water to be soaked for 10 minutes, taking out the sample piece by using tweezers, suspending the sample piece for 1 minute, and weighing the sample piece to obtain a sample after water absorptionTablet weight M₂. The number of sampling tests was N =3, and the average of the 3 last times was calculated for the imbibition rate by the following formula: liquid absorption rate = (M)₂-M₁）/M₁×100%。

[ Latitude and longitude intensity of non-woven fabrics ]

Taking the size of a sample: width 50mm × length 200mm, 5 pieces, nip: 100mm, drawing speed: 200 mm/min. And (4) stretching by using a stretching strength machine, recording the warp and weft tensile strength when the steel is broken, respectively testing for 5 times, and calculating an average value.

Stress at 10% elongation in weft

Taking the size of a sample in the weft direction: width 50mm × length 200mm, 5 pieces, nip: 100mm, drawing speed: 200 mm/min. The tensile strength was recorded at 10% elongation by stretching with a tensile strength tester, and the average value was calculated after 5 tests.

[ coefficient of static Friction in Wet State ]

Placing a sample soaked by the essence on the artificial skin, placing a weight weighing 750 grams on the sample, inclining the artificial skin by an inclined friction tester, recording the inclination angle when the sample starts to slide, and obtaining the tangent value of the inclination angle, namely the static friction coefficient of the material.

Example 1

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 42%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 2

30 weight percent of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm is adopted, and 40 weight percent of polylactic acid/polyamide 6 sea-island short fiber with the real heart rate of 58 percent, the leaf-shaped bending angle of 135 ℃ and the length of 40 weight percentThe diameter ratio is 1.0, and the cross-sectional area is 142 μm²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 3

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 72%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 4

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 58%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.5 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 5

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 58%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 2.0 and cross-sectional area of 142 mu m are adopted²Respectively processing the terylene cross-shaped cross-section fiber and 30 weight percent of viscose fiber with the average fiber diameter of 9.2 mu m by cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting,the gram weight of 50g/m is obtained²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 6

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 58%, leaf-shaped bending angle of 105 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 7

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 58%, leaf-shaped bending angle of 170 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 1 below.

Example 8

10 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 120nm and the length of 51mm and 60 wt% of real heart rate of 58%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 9

Using 60% by weight of cellulosePolylactic acid/polyamide 6 sea-island staple fiber with average diameter of 420nm and length of 51mm, 10 wt% of real heart rate of 58%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0, and cross-sectional area of 142 μm²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 10

100 wt% of polylactic acid/polyamide 6 (40/60%) sea island short fiber with average fiber diameter of 240nm and length of 51mm is put into a cotton mixing box to be subjected to cotton opening, cotton mixing, carding and lapping to obtain the sea island short fiber with the gram weight of 9.4g/m²A polylactic acid/polyamide 6 fiber web of; the actual heart rate is 58%, the leaf-shaped bending angle is 135 ℃, the length-diameter ratio is 1.0, and the section area is 142 mu m²25g of cross-shaped cross-section fibers and 17.5g of viscose fibers with the average fiber diameter of 9.2 mu m are respectively subjected to cotton opening, cotton mixing, opening, carding, lapping and spunlace to obtain the viscose fibers with the gram weight of 42.5g/m²The hybrid fiber web of (1); sequentially laminating the polylactic acid/polyamide 6 fiber net, the mixed fiber net and the polylactic acid/polyamide 6 fiber net, and performing spunlace reinforcement, sea removal and heat setting on the laminated three-layer fiber net to obtain the fiber net with the gram weight of 50g/m²The three-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 11

100 wt% of polylactic acid/polyamide 6 (40/60%) sea island short fiber with average fiber diameter of 240nm and length of 51mm is put into a cotton mixing box to be subjected to cotton opening, cotton mixing, carding and lapping to obtain the sea island short fiber with the gram weight of 28.1g/m²A polylactic acid/polyamide 6 fiber web of; the actual heart rate is 58%, the leaf-shaped bending angle is 135 ℃, the length-diameter ratio is 1.0, and the section area is 142 mu m²Respectively opening, mixing, opening, carding, lapping and spunlacing 15g of cross-shaped cross-section fibers and 12.5g of viscose fibers with the average fiber diameter of 9.2 mu m to obtain the weight of 27.5g/m²Mixed fiber web of(ii) a Sequentially laminating the polylactic acid/polyamide 6 fiber net, the mixed fiber net and the polylactic acid/polyamide 6 fiber net, and performing spunlace reinforcement, sea removal and heat setting on the laminated three-layer fiber net to obtain the fiber net with the gram weight of 50g/m²The three-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 12

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of polylactic acid/polyamide 6 sea-island short fiber with the real heart rate of 58% and the cross-sectional area of 142 mu m are adopted²Respectively opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting 30 wt% of the polyester triangular cross-section fibers and 30 wt% of viscose fibers with the average fiber diameter of 9.2 mu m to obtain the polyester triangular cross-section fibers and the viscose fibers with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 13

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 58%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0 and cross-sectional area of 253 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 14

100 wt% of polylactic acid/polyamide 6 (40/60%) sea island short fiber with average fiber diameter of 240nm and length of 51mm is put into a cotton mixing box to be subjected to cotton opening, cotton mixing, carding and lapping to obtain the sea island short fiber with the gram weight of 18g/m²A polylactic acid/polyamide 6 fiber web of; the actual heart rate is 58%, the leaf-shaped bending angle is 135 ℃, the length-diameter ratio is 1.0, and the section area is 142 mu m²Respectively opening, cotton mixing, opening, carding, lapping and spunlacing 20g of the terylene cross-shaped cross-section fiber and 15g of the viscose fiber with the average fiber diameter of 9.2 mu m,the gram weight obtained is 35g/m²The hybrid fiber web of (1); sequentially laminating the polylactic acid/polyamide 6 fiber net, the mixed fiber net and the polylactic acid/polyamide 6 fiber net, and performing spunlace reinforcement, sea removal and heat setting on the laminated three-layer fiber net to obtain the fiber net with the gram weight of 50g/m²The three-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Example 15

30 weight percent of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 70 weight percent of sea-island short fiber with the real heart rate of 58 percent, the leaf-shaped bending angle of 135 ℃, the length-diameter ratio of 1.0 and the cross-sectional area of 142 mu m are adopted²Respectively carrying out opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on the terylene cross-shaped cross-section fibers to obtain the terylene cross-shaped cross-section fibers with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric for cosmetics of the present invention was evaluated for various physical properties, as shown in table 2 below.

Comparative example 1

30% by weight of polylactic acid/polyamide 6 sea-island staple fiber having an average fiber diameter of 240nm and a length of 51mm, and 40% by weight of a cross-sectional area of 142 μm²Respectively opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting the terylene circular cross-section fiber and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the terylene circular cross-section fiber with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric was evaluated for various physical properties as shown in Table 3 below.

Comparative example 2

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 240nm and the length of 51mm and 40 wt% of real heart rate of 92%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric was evaluated for various physical properties as shown in Table 3 below.

Comparative example 3

70 wt% of solid content is 58%, the bending angle of the leaf shape is 135 ℃, the length-diameter ratio is 1.0, and the cross-sectional area is 142 mu m²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of cross-shaped section fiber of terylene and 30 wt% of viscose fiber with the average fiber diameter of 9.2 mu m to obtain the product with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The nonwoven fabric was evaluated for various physical properties as shown in Table 3 below.

Comparative example 4

30 wt% of polylactic acid/polyamide 6 sea-island short fiber with the average fiber diameter of 780nm and the length of 51mm and 40 wt% of real heart rate of 58%, leaf-shaped bending angle of 135 ℃, length-diameter ratio of 1.0 and cross-sectional area of 142 mu m are adopted²Respectively carrying out cotton opening, cotton mixing, opening, carding, lapping, spunlacing, sea removing and heat setting on 30 wt% of the terylene cross-shaped cross-section fiber and 30 wt% of viscose fiber with the fiber diameter of 9.2 mu m to obtain the terylene cross-shaped cross-section fiber with the gram weight of 50g/m²The single-layer spunlace nonwoven fabric. The physical properties of the nonwoven fabric for cosmetic preparations were evaluated in the following table 3.

TABLE 1

TABLE 2

TABLE 3

。

According to the above table: (1) as is clear from examples 1 to 3, in example 1, the solid content of the irregularly-shaped cross-section fibers was low under the same conditions, and although the stress at 10% elongation in the weft direction of the obtained cosmetic nonwoven fabric was small, that is, the cosmetic nonwoven fabric was good in flexibility and high in liquid absorption rate, slight neps and hairiness were observed when the web was formed; on the other hand, in example 2, the actual fiber diameter of the irregularly shaped cross-section fiber is in the preferable range, and not only the web-forming property is good, but also the obtained cosmetic nonwoven fabric has good flexibility and high liquid absorption rate, that is, the cosmetic nonwoven fabric has excellent comprehensive properties.

(2) From examples 2, 4 and 5, it is understood that, under the same conditions, the aspect ratio of the cruciform cross-sectional fibers in example 2 is in a more preferable range, and the obtained cosmetic nonwoven fabric has high strength, low stress at 10% elongation in the weft direction, high liquid absorption, that is, the cosmetic nonwoven fabric is easy to handle, has good flexibility, and has a high liquid chemical retention rate.

(3) From examples 2, 6 and 7, it is understood that under the same conditions, the cross-section polyester fiber in example 2 has a more preferable leaf bending strength, and the resultant cosmetic nonwoven fabric has a lower stress at 10% elongation in the weft direction, a high liquid absorption rate, i.e., a more preferable softness and a high chemical solution retention rate.

(4) From examples 10, 11 and 14, it is understood that, under the same conditions, if the ratio of nanofibers and the ratio of fibers having a modified cross section in example 14 are both in the more preferable ranges, the softness, liquid absorption rate and static friction coefficient of the obtained nonwoven fabric for cosmetic use are moderate, that is, the nonwoven fabric for cosmetic use has excellent overall performance.

(5) It is understood from examples 2 and 12 that, under the same conditions, the non-woven fabric for cosmetics obtained by using the above-mentioned non-woven fabric for cosmetics has a higher liquid absorption rate and a higher flexibility because the fiber having a cross-shaped cross section is a polyester fiber in example 2 and the fiber having a cross-shaped cross section is a triangular fiber in example 12.

(6) As is clear from examples 2 and 13, under the same conditions, the cross-sectional area of the irregularly-shaped cross-sectional fiber in example 2 is within the preferred range, and the obtained cosmetic nonwoven fabric has a smaller stress at 10% elongation in the weft direction, a high liquid absorption rate, that is, a better softness and a high chemical solution retention rate, as compared with the latter.

(7) As is clear from examples 2 and 15, the nonwoven fabric for cosmetic products obtained in example 2 containing a certain proportion of viscose fibers under the same conditions has improved liquid absorption performance, i.e., higher liquid absorption rate, than the latter.

(8) As is clear from example 2 and comparative example 1, the nonwoven fabric for cosmetics obtained in the former example, which contains the cross-section polyester fiber and the nonwoven fabric for comparative example 1 contains the circular-section polyester fiber under the same conditions, has a smaller stress at 10% elongation in the weft direction, a higher liquid absorption rate, i.e., better flexibility, and a higher chemical solution retention rate than the latter example.

(9) It is understood from example 2 and comparative example 2 that, under the same conditions, the solid content of the irregularly-shaped cross-section fibers in comparative example 2 is too high, and the stress at 10% elongation in the weft direction of the obtained nonwoven fabric is large, that is, the nonwoven fabric is poor in flexibility and also poor in liquid absorption rate.

(10) It is understood from example 15 and comparative example 3 that, under the same conditions, the static friction coefficient of the obtained nonwoven fabric is low, that is, the adhesion of the nonwoven fabric is poor, since the nanofibers are not used in comparative example 3.

(11) It is understood from example 2 and comparative example 4 that the diameter of the nanofibers in comparative example 4 is too large under the same conditions, and the static friction coefficient of the obtained nonwoven fabric is low, that is, the adhesion of the nonwoven fabric is poor.

Claims

1. A non-woven fabric for cosmetics, characterized in that: the non-woven fabric at least contains nano fibers with the average diameter of 100-450 nm and profiled cross-section fibers with the actual heart rate of 40-75%.

2. The nonwoven fabric for cosmetics according to claim 1, characterized in that: the nonwoven fabric contains 20 to 40 wt% of hydrophilic fibers.

3. The nonwoven fabric for cosmetics according to claim 1, characterized in that: the content of the nano-fibers is 15-50 wt%, and the content of the profiled cross-section fibers is 30-50 wt%.

4. The nonwoven fabric for cosmetics according to claim 1 or 3, characterized in that: the cross section of the profiled cross section fiber is in a cross shape.

5. The nonwoven fabric for cosmetics according to claim 4, characterized in that: the leaf-shaped bending angle of the cross-shaped section fiber is 100-160 ℃.

6. The nonwoven fabric for cosmetics according to claim 4, characterized in that: the length-diameter ratio of the cross-shaped section fibers is 1.0-1.5.

7. The nonwoven fabric for cosmetics according to claim 1 or 3, characterized in that: the cross-sectional area of the profiled cross-section fiber is 80-200 mu m²。

8. The nonwoven fabric for cosmetics according to claim 1 or 3, characterized in that: the liquid absorption rate of the non-woven fabric is more than 800%.

9. The nonwoven fabric for cosmetics according to claim 1 or 3, characterized in that: the nonwoven fabric has a stress of 2.0N/50mm or less at 10% elongation in the weft direction.

10. The nonwoven fabric for cosmetics according to claim 1 or 3, characterized in that: the nonwoven fabric has a static friction force of 0.4 or more in a wet state.