WO2019059706A1 - Mask pack sheet - Google Patents

Abstract

The present invention relates to a mask pack sheet and, more particularly, to a mask pack sheet made of a non-woven fiber aggregate comprising lyocell fiber. The mask pack sheet is made of a non-woven fiber aggregate comprising lyocell fiber, and is characterized in that the fineness of the lyocell fiber is 1.0 to 1.4 denier. The mask pack sheet according to the present invention is made of a non-woven fiber aggregate comprising lyocell fiber and thus has improved flexibility. Accordingly, the mask pack sheet does not detach from the skin even after a long period of wearing, and has improved attachment to skin. The degree of absorption of essence or moisture and the transparency after essence or moisture treatment can be improved. In addition, the mask pack sheet can be used as a mask pack supporter sheet, thereby improving the attachment to skin and the feeling of wearing, and the excellent absorption enables effective supply of nutrients to the skin. Furthermore, the wet transparency is improved such that, when the mask pack sheet is tightly attached to the user's face, the color of the mask pack sheet appears transparent rather than white when the user's face is seen from the outside. Accordingly, the color of the mask pack sheet looks close to the color of the user's face such that less difference in appearance is noticeable, thereby providing an aesthetic appearance after wearing the mask pack.

Description

Mask pack sheet

The present invention relates to a mask pack sheet, and more particularly, to a mask pack sheet formed from a nonwoven fabric assembly including lyocell fibers.

The mask pack refers to a mask pack for impregnating a supporter sheet with an active substance or a cosmetic composition containing ingredients useful for the skin such as a liquid or gel moisturizing agent and a whitening agent for skin health such as moisturizing the skin, removing wastes, whitening, It means a product that is made to contact the face for a long time in order to supply nutrition to the skin.

The mask pack sheet used as the support of the mask pack is made of natural fibers such as cotton or cotton, silk, hemp, silk, etc. However, it is difficult to adhere to the face portion having many bends, The nonwoven fabric aggregate prepared by using the mixture of the nonwoven fabric fibers is often used.

The main synthetic fibers used for the mask pack sheet are polypropylene fiber (PP fiber), polyester fiber (PET fiber), polyethylene fiber (PE fiber), polyvinyl alcohol fiber (PVA fiber) or polylactic acid Fiber), and a variety of materials using these materials have been studied extensively.

In the case of using such a synthetic fiber, it is necessary to prepare a meltblown nonwoven fabric aggregate made of microfine fiber while improving the absorbency by adding a surfactant, which is a hydrophilic additive, 2011-0060525 (public) is introduced.

However, even if such a technique is used, the stretchability is weak due to the limitation of physical properties of the material itself constituting the synthetic fiber, and when it is made into a mask pack sheet and applied to the skin, it causes inconvenience in activity, The skin is separated from the skin.

In addition, thermoplastic resins such as polypropylene fibers (PP fibers), polyester fibers (PET fibers), polyethylene fibers (PE fibers), polyvinyl alcohol fibers (PVA fibers), and polylactic acid The wettability with respect to the cosmetic composition deteriorates so that the application as a mask pack sheet to be impregnated with the cosmetic composition is limited.

In order to solve the above problems, the inventors of the present invention have found that when a mask pack sheet is constituted by using a nonwoven fibrous assembly including lyocell fibers, skin adhesion, essence of the material itself constituting the mask pack sheet, Or the transparency after the water treatment is improved, and the present invention has been completed.

Accordingly, an object of the present invention is to provide a mask pack sheet formed of a nonwoven fibrous aggregate containing lyocell, which is improved in skin adhesion and improved in absorbency of essence or moisture, transparency after essence treatment or moisture treatment.

Another object of the present invention is to provide a cosmetic mask pack using the mask pack sheet.

Accordingly, the present invention provides, as a first preferred embodiment, a mask pack sheet formed from a nonwoven fabric assembly comprising lyocell fibers, wherein the lyocell fiber has a fineness of 1.0 to 1.4 denier to provide.

The fiber length of the lyocell fiber according to the first embodiment may be 36 to 40 mm.

The number of crimps of the lyocell fiber according to the first embodiment may be 5 to 20 cpi.

The lyocell fiber according to the first embodiment may have an emulsion content of 0.1 to 0.4% by weight.

The basis weight of the nonwoven fabric aggregate according to the first embodiment may be 30 to 60 g / m 2.

The thickness of the nonwoven fabric aggregate according to the first embodiment may be 0.3 to 0.5 mm.

The nonwoven fabric aggregate according to the first embodiment may have a water absorption rate of 1000 to 1700 wt%.

The nonwoven fabric aggregate according to the first embodiment may have transparency of 80 to 84% after the moisture treatment.

The nonwoven fabric aggregate according to the first embodiment may have a transparency of 88 to 94% after the essence treatment.

The nonwoven fabric aggregate according to the first embodiment may have a skin adhesion force of 3.6 to 4.2 gf after moisture treatment.

The nonwoven fabric aggregate according to the first embodiment may have a skin adhesion of 4.5 to 5.4 gf after the essence treatment.

The nonwoven fabric aggregate according to the first embodiment may have an emulsion content of 0.001 wt% or less.

In addition, the present invention can provide a cosmetic mask pack using the mask pack sheet as another preferred first embodiment.

Since the mask pack sheet of the present invention is formed of a nonwoven fibrous aggregate containing lyocell, its elasticity is improved, so that it is not separated from the skin even when worn for a long time, so that the skin adhesion is improved and the skin absorption power, essence, The transparency can be improved.

In addition, by using the mask pack sheet as the support sheet of the mask pack for cosmetics, not only the skin adhesion force and wearing feeling are improved but also the absorbency is excellent, so that nutrition can be effectively supplied to the skin.

In addition, when the wet transparency is improved and brought into close contact with the user's face, the color of the mask pack sheet is transparent rather than appearing white when the user's face is viewed from the outside, and is made closer to the color of the user's face, So that the appearance after wearing the mask pack can be enhanced.

Hereinafter, the present invention will be described in detail based on embodiments.

The present invention relates to a mask pack sheet formed from a nonwoven fabric assembly comprising lyocell fibers, wherein the fineness of the lyocell fibers is 1.0 to 1.4 denier.

The Lyocell fiber is produced from natural pulp and amine oxide hydrate, and has fiber characteristics such as excellent tensile property and tactile property as compared with conventional regenerated fiber. In addition, the lyocell fiber is a hydrophilic material. As the fineness is lowered, the lyocell fiber has a higher specific surface area and is more excellent in water absorption ability. When a liquid composition such as moisture and essence is impregnated into the nonwoven fibrous aggregate containing the lyocell fiber, The absorbency of the nonwoven fabric aggregate is increased and the retention of the liquid composition in the nonwoven fabric aggregate can be increased.

In particular, the fineness of the lyocell fiber may be 1.0 to 1.4 denier. At this time, if the fineness of the lyocell fiber is less than 1.0 denier, the production of the lyocell fiber becomes difficult. When the lyocell fiber exceeds 1.4 denier, the fineness corresponding to the general fineness applied to the mask pack is lost, The physical properties such as essence absorbency show general level.

In addition, the lyocell fiber may be staple fiber and the fiber length may be 36 to 40 mm. When the lyocell fiber is used as a nonwoven fabric aggregate for a mask pack within the fiber length range, there is an advantage in that the processability during the carding process during the production of the nonwoven fabric aggregate is excellent.

The number of crimps of the lyocell fiber may be 5 to 20 cpi. The crimp number may be 5 to 20 cpi, preferably 8 to 12 cpi. If the number of crimps is less than 5 cpi, the entanglement of the fibers in the carding process is low during the manufacturing process of the nonwoven fabric aggregate, resulting in a process problem. If the number of crimps exceeds 20 cpi, the crimp number is too large, A problem arises. When the lyocell fiber has a crimp number of 8 to 12 cpi, the absorption rate, transparency and adhesion of the liquid composition can be improved when the lyocell fiber is included in the nonwoven fabric aggregate, do.

The lyocell fiber may have an emulsion content of 0.1 to 0.4% by weight. When the emulsion satisfies the weight percentage range, it reduces the friction generated during the process of forming the filament to be crimped to be described later, and forms a fiber-to-fiber crimp. Also, the carding property of the nonwoven fabric aggregate is improved.

The nonwoven fibrous assembly includes the lyocell fibers and may be used in a mask pack sheet. The basis weight of the nonwoven fibrous aggregate may be 30 to 60 g / m ² , and the thickness of the nonwoven fibrous aggregate may be 0.3 to 0.5 mm. The thickness of the nonwoven fabric aggregate varies depending on the fineness of the staple fiber and the basis weight of the nonwoven fabric aggregate. The smaller the fineness of the staple fiber and the smaller the nonwoven fabric aggregate basis weight, the thinner the thickness. The basis weight and the thickness range are set to an optimum range for improving the water absorption, transparency, and adhesion of the liquid composition in the nonwoven fabric aggregate comprising the lyocell fibers satisfying the fineness, fiber length, crimp water and emulsion content of the lyocell fiber .

The nonwoven fabric aggregate may have a water absorption rate of 1000 to 1700%. As described above, the lyocell fiber is hydrophilic and has higher water absorption than other fibers. However, when the basis weight and thickness range of the nonwoven fabric aggregate are satisfied while satisfying the characteristics of the lyocell fiber, The water absorption rate of the nonwoven fabric aggregate can be adjusted to the above range.

The nonwoven fabric aggregate may have a transparency of 80 to 84% after the moisture treatment, and a transparency after the essence treatment of 88 to 94%. The transparency of the nonwoven fabric aggregate is such that the fineness of the lyocell fiber is in the range of 1.0 to 1.4 denier and the fineness of the nonwoven fabric aggregate including the lyocell fiber is reduced. Therefore, the liquid composition such as moisture, When the nonwoven fabric is supported on the nonwoven fabric aggregate, the nonwoven fabric aggregate can have a soft feeling and transparency within the range of the transparency.

The nonwoven fabric aggregate may have a skin adhesion force of 3.6 to 4.2 gf after the water treatment and a skin adhesion force of 4.5 to 5.4 gf after the essence treatment. The skin adhesion of the nonwoven fabric aggregate also satisfies the characteristics of the lyocell fiber, and the above range can be satisfied by the basis weight and thickness of the nonwoven fabric aggregate containing the same.

The nonwoven fabric aggregate may have an emulsion content of 0.001 wt% or less. The nonwoven fabric aggregate exhibits the same contents as most of the emulsions contained in the lyocell fibers are washed away when the nonwoven fabric aggregate is subjected to the entrapment of the spun lace process during the manufacturing process of the nonwoven fabric aggregate.

Hereinafter, the nonwoven fabric aggregate containing the lyocell fibers will be described in detail through a method for producing the nonwoven fabric aggregate.

The method of producing the nonwoven fibrous aggregate comprises: (S1) spinning a lyocell spinning dope comprising a cellulose pulp and a solvent; (S2) solidifying the lyocell radiation dope radiated in the step (S1) to obtain a lyocell multifilament; (S3) washing the lyocell multifilament obtained in the step (S2); (S4) emulsifying the lyocell multifilament washed in the step (S3); (S5) crimping the tanned lyocell multifilament in a stuffer box to obtain a crimped tow; (S6) drying and cutting the crimped tow obtained in the step (S5) to obtain lyocell staple fibers; And (S7) preparing the lyocell staple fibers obtained in the step (S6) as a nonwoven fabric assembly.

[Step (S1)] [

(S1) is a step of radiating a lyocell spinning dope comprising cellulose pulp and an NMMO aqueous solution.

The lyocell spinning dope comprises 6 to 16% by weight of cellulose pulp; And 84 to 94% by weight of an aqueous solution of N-methylmorpholine-N-oxide, wherein the cellulose pulp has an alpha-cellulose content of 85 to 97% by weight and a degree of polymerization (DPw) of 600 to 1700 have.

If the content of the cellulose pulp in the lyocell radial dope is less than 6% by weight, it is difficult to realize the fiber property. If the content is more than 16% by weight, it may be difficult to dissolve in the aqueous liquid.

If the content of the aqueous solution of N-methylmorpholine-N-oxide in the lyocell radial dope is less than 84% by weight, the solubility of the solution is undesirably large, and if it exceeds 94% by weight, It may be difficult to produce a uniform fiber.

The weight ratio of N-methylmorpholine-N-oxide and water in the N-methylmorpholine-N-oxide aqueous solution may be 93: 7 to 85:15. When the weight ratio of N-methylmorpholine-N-oxide and water is more than 93: 7, the dissolution temperature is high and the cellulose may be decomposed upon dissolving cellulose. When the weight ratio is less than 85:15, And the dissolution of cellulose may be difficult.

The above-described radiation dope is used to discharge it from the spinneret of the spinneret. At this time, the spinneret serves to discharge the spinning dope on the filament as a coagulating solution in the coagulation bath through the air gap section. The step of discharging the spinning dope from the spinneret can be performed at a spinning temperature of 80 to 130 캜.

[Step S2]

(S2) is a step of solidifying the lyocell radiation dope radiated in the step (S1) to obtain a lyocell multifilament, wherein the solidification in the step (S2) is performed by air quenching (Q / A); And a secondary coagulation step in which the primary coagulated radial dope is immersed in the coagulating liquid to coagulate.

In the step (S1), after the spinning dope is discharged through the spinneret, it can be passed through the air gap section of the space between the spinneret and the coagulation bath. In such an air gap section, cooling air is supplied from the air cooling part located inside the detachment of the donut type to the outside from the inside of the detent, which can be primary solidified by air quenching which supplies the cooling air to the radiation dope.

At this time, the factor affecting the physical properties of the lyocell multifilament obtained in the step (S2) is the temperature and the wind speed of the cooling air in the air gap section, and the solidification in the step (S2) The cooling air having a wind speed of 50 m / s may be supplied to the spinning dope to solidify.

If the temperature of the cooling air during the primary solidification is less than 4 캜, the surface of the spinneret cools, the cross-section of the lyocell multifilament becomes uneven and the spinning processability becomes poor. If the temperature is more than 15 캜, The radiation fairness becomes poor.

If the air velocity of the cooling air during the first solidification is less than 5 m / s, the primary coagulation due to the cooling air is insufficient and the spinning durability is poor and the spinning dope is generated. If the air velocity exceeds 50 m / s, It is shaken by the air and the radiation fairness becomes poor.

After primary coagulation by air quenching, the spinning dope is supplied to the coagulation bath containing the coagulation solution and secondary coagulation can proceed. On the other hand, the temperature of the coagulating solution may be 30 DEG C or less for the progress of proper secondary coagulation. This is so that the secondary solidification temperature is not higher than necessary, so that the solidification rate is properly maintained. Herein, the coagulating solution is not particularly limited as it can be manufactured and used in a conventional composition in the technical field to which the present invention belongs.

[Step (S3)] [

(S3) is washing the lyocell multifilament obtained in the step (S2).

Specifically, the lyocell multifilament obtained in the step (S2) may be introduced into a traction roller and then introduced into a water bath to be washed with water.

In the washing step of the filament, a washing solution at a temperature of 0 to 100 ° C may be used in consideration of the ease of recovery and reuse of the solvent after washing with water. Water can be used as the washing solution, May be further included.

[Step (S4)] [

(S4) is a step of tanning the lyocell multifilament washed in the step (S3), and may be dried after emulsion treatment.

The tanning process takes the form that the multifilaments are buried completely in the emulsion and keeps the amount of emulsion adhering to the filaments by the press rollers attached to the exit rolls of the tanning apparatus and the discharge rollers. The emulsions reduce the friction that occurs when filaments contact dry rollers, guides, and crimps, and allow the formation of fiber-to-fiber crimps.

[Step (S5)] [

(S5) is a step of obtaining a crimped tow by crimping the lyocell multifilament treated by tanning in the step (S4).

Crimping is a process of applying a crimp to a multifilament, specifically crimping with a stuffer box to obtain a crimped tow having 8 to 12 crimps per inch.

In step (S5), steam may be supplied to the lyocell multifilament and crimped by applying pressure.

Specifically, by passing the lyocell multifilament in a steam box (Steam box), the steam is 0.1 ~ 1.0kgf / cm ² and supplied to raise the temperature, and then 1.5 to pressure by the press roller (Press Roller of 2.0kgf / cm ² ), Thereby forming a crimp in the stopper box.

At this time, if the supply amount of steam is less than 0.1 kgf / cm ^{2, the} crimp can not be smoothly formed. If the supply amount of steam is more than 1.0 kgf / cm ^2, the temperature in the stopper box rises to 120 ° C or more, and the filaments stick together and can not pass through the stopper box. If the pressure for pressing the pressing roller is less than 1.5 kgf / cm ^{2, the} desired crimp number is not formed. If the pressing force is more than 2.0 kgf / cm ^{2, the} pressing force is too strong, and the filament may not pass through the stopper box.

[Step S6]

(S6) is a step of drying and cutting the crimped tow obtained in the step (S5) to obtain a lyocell staple fiber.

The crimped tow is dried using a Lattice drier and subjected to a cutting process to form a lyocell staple fiber.

[Step S7]

(S7) is a step of preparing the lyocell staple fibers obtained in the step (S6) into a nonwoven fabric aggregate.

The lyocell staple fibers are received and entangled by carding and spun racing to produce a nonwoven fabric assembly.

The present invention can be used as a cosmetic mask pack using the mask pack sheet. Using the mask pack sheet as a support sheet, the mask pack not only improves the skin adhesion and comfort in the face portion having many bends, but also absorbs liquid compositions such as moisture and essence, .

In addition, when the wet transparency is improved and is brought into close contact with the user's face, the appearance of the user's face may be made to be close to that of the user's face.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments.

Example 1

A cellulose pulp having a degree of polymerization (DPw) of 820 and an alpha-cellulose content of 93.9% was mixed with an NMMO / H2O mixed solvent (weight ratio 90/10) having a propyl gallate content of 0.01% by weight so that the cellulosic pulp content % (Radiation dope concentration 10%).

First, the spinning dope was spinned while adjusting the discharge amount and spinning speed of the spinning dope so that the filament fineness of the filament was 1.25 denier while maintaining the spinning temperature at 110 캜 in the spinning nozzle. The spinning dope on the filament discharged from the spinneret was continuously supplied to the coagulating solution in the coagulation bath through the air gap section. At this time, the cooling air in the air gap section is subjected to primary solidification of the spinning dope at a temperature of 8 캜 and a wind speed of 5 m / s.

The coagulating solution used was one with a temperature of 25 ° C and a concentration of 80% by weight of water and 20% by weight of NMMO. The concentration of the coagulating solution was continuously monitored using a sensor and an refractometer.

The filament drawn in the air layer through the pulling roller was washed with a wash water sprayed in a water washing device to remove the remaining NMMO and the filament was allowed to uniformly adhere to the filament, % And dried at 150 ° C on a drying roller.

Finally, the prepared lyocell multifilament was passed through a steam box (pressure condition: 0.15 kgf / cm ² ) and preheated to give a temperature to the tow, and the stuffer box compression ruler was used at a pressure of 1.5 kgf / cm ² To thereby produce a crimped tow in a stuffer box, dry it through a Lattice drier, and finally cut to produce a lyocell staple fiber having a 38 mm fiber length.

The lyocell staple fiber was manufactured through a carding and spun raising process which is a process of producing a nonwoven fabric aggregate. Finally, the nonwoven fabric aggregate was prepared, the basis weight of the nonwoven fabric aggregate was adjusted to 30 gsm by controlling the feed rate and the process speed, The aggregate weighing deviation was in the range of ± 10%.

Example 2

Nonwoven fabric aggregate A nonwoven fabric aggregate having a fineness of 1.25 denier was prepared in the same manner as in Example 1, except that the basis weight was 40 gsm.

Example 3

A nonwoven fabric aggregate having a fineness of 1.25 denier was prepared in the same manner as in Example 1, except that the basis weight of the nonwoven fabric aggregate was adjusted to be 50 gsm.

Example 4

A nonwoven fabric aggregate having a fineness of 1.25 denier was prepared in the same manner as in Example 1, except that the basis weight of the nonwoven fabric aggregate was adjusted to 60 gsm.

Example 5

A 1.0% denier nonwoven fabric aggregate was prepared in the same manner as in Example 1, except that the single-fineness of the lyocell staple fiber was made 1.0 denier and the basis weight of the nonwoven fabric aggregate was 40 gsm.

Example 6

A 1.0% denier monofilament fiber aggregate was prepared in the same manner as in Example 1, except that the fineness of the lyocell staple fiber was made 1.0 denier and the basis weight of the nonwoven fabric aggregate was 50 gsm.

Example 7

A nonwoven fabric aggregate having a single fineness of 1.3 denier was prepared in the same manner as in Example 1, except that the fineness of the lyocell staple fiber was set to 1.3 denier and the basis weight of the nonwoven fabric aggregate was set to 40 gsm.

Example 8

A nonwoven fabric aggregate having a single fineness of 1.3 denier was prepared in the same manner as in Example 1, except that the fineness of the lyocell staple fiber was set at 1.3 denier and the basis weight of the nonwoven fabric aggregate was set at 50 gsm.

Example 9

A nonwoven fabric aggregate of 5 cpi of crimp number was prepared in the same manner as in Example 1, except that the pressure condition of the steam box and the pressure condition of the Stuber box compression roller were adjusted so that the crimp number of the lyocell staple fiber was 5 cpi.

Example 10

A nonwoven fabric aggregate having a crimp number of 20 cpi was prepared in the same manner as in Example 1, except that the pressure condition of the steam box and the pressure condition of the Stuber box compression roller were adjusted so that the crimp number of the lyocell staple fiber was 20 cpi.

Comparative Example 1

A nonwoven fabric aggregate having a single fineness of 1.5 denier was prepared in the same manner as in Example 1, except that the fineness of the lyocell staple fiber was set to 1.5 denier and the basis weight of the nonwoven fabric aggregate was set to 40 gsm.

Comparative Example 2

A nonwoven fabric aggregate having a single fineness of 1.5 denier was prepared in the same manner as in Example 1, except that the single fineness of the lyocell staple fiber was set to 1.5 denier and the basis weight of the nonwoven fabric aggregate was set to 50 gsm.

Comparative Example 3

A 2.0% denier nonwoven fabric aggregate was prepared in the same manner as in Example 1, except that the fineness of the lyocell staple fiber was adjusted to 2.0 denier and the basis weight of the nonwoven fabric aggregate was set to 40 gsm.

The fineness, thickness, transparency, absorbency and skin adhesion of the nonwoven fabric aggregate were measured and calculated for the nonwoven fabric assemblies prepared in the Examples and Comparative Examples as follows, Are shown in Table 1 below.

(1) Fineness

The monofilament cross-sectional area of the lyocell fiber obtained from the cross-sectional analysis and the density of the lyocell fiber (1.49 g / cm ³ ) were calculated to calculate the fineness of the lyocell fiber.

<Formula 1>

Fineness (De) = [monofilament cross-section of the lyocell fibers (㎛) ² × Lioness density (g / cm ³⁾ of the fiber cells × 9000 (m)] / 1000000

(2) Crimp Number

KS K 0326 standard. After taking a 20-sample sample without any damage to the crimp, prepare a shiny piece (25 mm clearance) prepared beforehand with 1 to 4 glass fibers of amyl acetate with 4-5% celluloid 25 ± 5%). After that, leave the adhesive to dry. The sample was subjected to a crimp test machine to obtain a crimp number of 25 mm between 1 and 100 denier per 1D per 1D (= 2 mgf). Table 1 shows the average value up to one decimal place.

(3) Basis weight (gsm = g / m ² )

The nonwoven fibrous aggregate was sampled at a width of 5 cm and a length of 20 cm and weighed, and the basis weight was calculated by the following formula 2.

<Formula 2>

Basis weight = non-woven fiber aggregate sample weight measurement × 100

(4) Thickness

Mitutoyo no. 2046F. &Lt; / RTI &gt;

(5) Transparency

Sample preparation: Immerse the nonwoven fiber aggregate in water or essence for 10 minutes.

To measure the transparency of the nonwoven fiber aggregate, the haze meter (Nippon Denshoku Industry, NDH-5000), a light transmittance equipment, was used and the transmittance at a wavelength of nm was measured.

(6) Absorbency

After immersing the nonwoven fabric aggregate in water or essence, the weight of the nonwoven fabric aggregate was measured by measuring the before / after weight, and the ability of the nonwoven fabric aggregate to absorb water or essence was calculated by the following formula 3.

<Formula 3>

Absorbency (%) = {(Weight of nonwoven fabric aggregate after immersion - Weight of nonwoven fabric aggregate before immersion) / Weight of nonwoven fabric aggregate before immersion} × 100

(7) Skin adhesion

The nonwoven fiber aggregate is cut into a size of 25 mm x 150 mm, and immersed in water or essence for 10 minutes, and then adhered to the human arm. After adhesion, the adhesive force (unit gf) was measured using an Instron (Instron, 3365), while leaving the nonwoven fibrous assembly out of the skin.

division	S / F condition		Nonwoven fibrous aggregate conditions	Properties of nonwoven fiber aggregate
	The island (De)	Crimp Number (cpi)	Basis weight (gsm)	Thickness (mm)	Transparency (%)	Absorbency (%)	Skin adhesion (gf)
Example 1	1.25	10	30	0.33	Water 84 Essence 94	Water 1,000 essence 1,300	Water 3.6 Essence 4.5
Example 2	1.25	10	40	0.40	Water 82 Essence 92	Water 1,400 Essence 2,000	Water 4.0 Essence 5.0
Example 3	1.25	10	50	0.47	Water 81 Essence 90	Water 1,500 Essence 2,100	Water 4.1 Essence 5.1
Example 4	1.25	10	60	0.53	Water 80 Essence 88	Water 1,600 Essence 2,200	Water 4.2 Essence 5.3
Example 5	1.0	10	40	0.38	Water 82 Essence 93	Water 1,500 Essence 2,200	Water 4.1 Essence 5.2
Example 6	1.0	10	50	0.46	Water 80 Essence 91	Water 1,700 Essence 2,500	Water 4.2 Essence 5.4
Example 7	1.3	10	40	0.41	Water 81 Essence 91	Water 1,400 Essence 2,100	Water 4.1 Essence 5.1
Example 8	1.3	10	50	0.48	Water 79 Essence 90	Water 1,500 Essence 2,100	Water 4.2 Essence 5.2
Example 9	1.25	5	30	0.33	Water 76 Essence 84	Water 700 Essence 800	Water 3.0 Essence 4.0
Example 10	1.25	20	30	0.33	Water 78 Essence 86	Water 800 Essence 900	Water 3.1 Essence 4.1
Comparative Example 1	1.5	10	40	0.42	Water 78 Essence 86	Water 980 Essence 1,200	Water 3.4 Essence 4.4
Comparative Example 2	1.5	10	50	0.50	Water 77 Essence 85	Water 1,000 essence 1,300	Water 3.5 Essence 4.5
Comparative Example 3	2.0	10	40	0.45	Water 77 Essence 86	Water 950 Essence 1,000	Water 3.3 Essence 4.3

As shown in Table 1, through the Examples 1 to 8 according to the present invention, the lyocell fibers comprising the optimal range of the fineness and the crimp number of the lyocell fiber, and the nonwoven fabric aggregate containing the lyocell By including the basis weight and the thickness in the respective optimum ranges, excellent adhesion, transparency, and absorption power can be ensured.

On the other hand, as can be seen from Comparative Examples 1 to 3, when the fineness of the lyocell fiber is outside the optimum range, the transparency, the absorbency and the skin adhesion are not improved, and only a part of the lyocell fiber is improved.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the embodiments described above are in all respects illustrative and not restrictive.

The present invention is applicable to a mask pack for cosmetics using a mask pack sheet.

Claims (13)

1. The present invention relates to a mask pack sheet formed from a nonwoven fibrous assembly comprising lyocell fibers,

   Wherein the fineness of the lyocell fiber is 1.0 to 1.4 denier.
2. The method according to claim 1,

   Wherein the fiber length of the lyocell fiber is 36 to 40 mm.
3. The method according to claim 1,

   Wherein the number of crimps of the lyocell fiber is 5 to 20 cpi.
4. The method according to claim 1,

   Wherein the lyocell fiber has an emulsion content of 0.1 to 0.4% by weight.
5. The method according to claim 1,

   Wherein the basis weight of the nonwoven fabric aggregate is 30 to 60 g / m ² .
6. The method according to claim 1,

   Wherein the thickness of the nonwoven fabric aggregate is 0.3 to 0.5 mm.
7. The method according to claim 1,

   Wherein the nonwoven fibrous aggregate has a water absorption rate of 1000 to 1700%.
8. The method according to claim 1,

   Wherein the nonwoven fabric aggregate has a transparency of 80 to 84% after the moisture treatment.
9. The method according to claim 1,

   Wherein the nonwoven fabric aggregate has a transparency of 88 to 94% after the essence treatment.
10. The method according to claim 1,

    Wherein the nonwoven fibrous aggregate has a skin adhesion force of 3.6 to 4.2 gf after moisture treatment.
11. The method according to claim 1,

    Wherein the nonwoven fibrous aggregate has a skin adhesion force after the essence treatment of 4.5 to 5.4 gf.
12. The method according to claim 1,

    Wherein the nonwoven fabric aggregate has an emulsion content of 0.001 wt% or less.
13. A mask pack for cosmetics using the mask pack sheet according to any one of claims 1 to 12.