US20140332025A1

US20140332025A1 - False eyelashes and manufacturing method therefor

Info

Publication number: US20140332025A1
Application number: US14/363,274
Authority: US
Inventors: Yong Se KIM; Wen Ri Jin; Shou Ji Zhao; Xiao Qing Ying; Xia Qing Ning
Original assignee: OMELON Co Ltd
Current assignee: OMELON Co Ltd
Priority date: 2012-01-19
Filing date: 2013-01-18
Publication date: 2014-11-13
Also published as: WO2013109102A1

Abstract

One aspect of the present invention relates to a method for manufacturing false eyelashes, and the false eyelashes in which an false eyelash part and an attachment part are integrally formed by injection molding, wherein the method comprises the steps of: preparing a mold; preparing a thermoplastic elastomer resin; and injecting the thermoplastic elastomer resin into an injection molding machine on which the mold is mounted so as to perform injection molding. The method for manufacturing the false eyelashes of the present invention has excellent production and economic feasibility, the quality of the manufactured false eyelashes is uniform, and the false eyelashes manufactured by the manufacturing method have excellent shape stability, elasticity, and can be provided in various colors and designs.

Description

TECHNICAL FIELD

The present invention relates to a false eyelash structure and a method of manufacturing the same, and more particularly, to a false eyelash structure manufactured through injection molding and a method of manufacturing the same.

BACKGROUND ART

Many women use false eyelashes for cosmetic purposes, and usage thereof is gradually increasing. Most false eyelashes are currently manufactured by artificially binding false eyelashes or through knitting and weaving. In particular, as an artificial binding method, an operation of eyelash extensions is a method of coupling eyelash extensions to tip ends of actual eyelashes of a user one by one. Thus, the process is time consuming and the eyelash extensions, which are thin and small, are difficult to handle.
Therefore, the present invention has been developed to improve quality uniformity, processibility, and economic feasibility of conventional techniques.

DISCLOSURE

Technical Problem

An object of the present invention is to provide a method of manufacturing a false eyelash structure providing excellent processibility.
Another object of the present invention is to provide a method of manufacturing a false eyelash structure providing uniform quality and excellent economic feasibility.
A further object of the present invention is to provide a false eyelash structure having excellent shape stability and elasticity.
Yet another object of the present invention is to provide a false eyelash structure having various colors and designs.
Yet another object of the present invention is to provide a method of manufacturing a false eyelash structure, by which a false eyelash structure having a complex structure can be manufactured through a single process.
The above and other objects of the present invention will be achieved by the present invention.

Technical Solution

In accordance with an aspect of the present invention, a method of manufacturing a false eyelash structure includes: preparing a mold; preparing a thermoplastic elastomer resin; and performing injection molding by introducing the thermoplastic elastomer resin into an injection molding machine on which the mold is mounted.
The injection molding may be multistage injection molding using at least one mold and at least one thermoplastic elastomer resin.
The method may be performed by double injection molding, and may include: preparing a first mold; preparing a first thermoplastic elastomer resin; performing primary injection molding by introducing the first thermoplastic elastomer resin into an injection molding machine on which the first mold is mounted; providing a false eyelash structure manufactured by the primary injection molding to a second mold; and performing secondary injection molding by introducing a second thermoplastic elastomer resin into an injection molding machine on which the second mold is mounted.
The first thermoplastic elastomer resin and the second thermoplastic elastomer resin may be the same type of thermoplastic elastomer resin.
The first thermoplastic elastomer resin and the second thermoplastic elastomer resin may have different properties or colors.
In the injection molding, the mold may have a temperature of 0° C. to 80° C.
The injection molding machine may include an injection portion, an intermediate portion, and a nozzle; and in the injection molding step, the injection portion may have a temperature of 80° C. to 100° C., the intermediate portion may have a temperature of 150° C. to 250° C., and the nozzle may have a temperature of 200° C. to 300° C.
The mold may have a pressure of 5 MPa to 40 MPa, and an injection pressure may range from 30 MPa to 100 MPa.
The injection molding machine may have a screw RPM of 30 RPM to 100 RPM.
The injection molding may have an injection time of 0.5 seconds to 20 seconds.
In accordance with another aspect of the present invention, a false eyelash structure includes: includes an artificial hair part and an attachment part integrally formed through injection molding.
The artificial hair part and the attachment part may include an olefin, styrene, amide, ester, urethane, silicone, or PVC-based thermoplastic elastomer resin, and the thermoplastic elastomer resin may have a glass transition temperature of 80° C. or less.
The artificial hair part may be formed on one surface of the attachment part and may include a plurality of artificial hairs of at least one type.
The artificial hair part may include at least two types of artificial hairs having different colors or properties.
The artificial hair part may include 3 to 100 artificial hairs, and the artificial hairs may have a length of 0.1 mm to 50 mm and a thickness of 0.05 mm to 2 mm.
The attachment part may be linear or curved, and may have a length of 20 mm to 50 mm and a thickness of 0.05 mm to 2 mm.
The attachment part may be curved, and may include a first curved portion and second curved portions or linear portions extending from opposite ends of the first curved portion.
The first curved portion and the second curved portion may have different curvatures or curvature directions.
The attachment part may be formed of the same type of thermoplastic elastomer resin as that of one type of the artificial hairs constituting the artificial hair part.
The attachment part may have a convex-concave pattern formed on at least one of the one surface and an opposite surface thereof.

Advantageous Effects

The method of manufacturing a false eyelash structure according to the present invention provides excellent processibility, economic feasibility, and uniform quality in manufacture of false eyelash structures. Further, the false eyelash structures manufactured by the method have excellent properties in terms of shape stability and elasticity, and can exhibit various colors and designs.

DESCRIPTION OF DRAWINGS

FIGS. 1 (a) to (c) show molds used in a method of manufacturing a false eyelash structure according to one embodiment of the invention, and FIGS. 1 (d) and (e) are a perspective view and a front view of the mold of FIG. 1( c), respectively;

FIG. 2 is a plan view of a false eyelash structure according to another embodiment of the present invention;

FIG. 3 shows an attachment part of a false eyelash structure according to one embodiment of the present invention;

FIGS. 4 (a) to (c) show false eyelash structures in which convex-concave patterns are formed in attachment parts thereof manufactured by the method according to the embodiment of the invention, and FIG. 4 (d) shows various convex-concave patterns;

FIG. 5 is a picture of false eyelash structures having various shapes manufactured by the method according to the embodiment of the present invention;

FIG. 6 shows a method of manufacturing a false eyelash structure according to a further embodiment of the present invention; and

FIGS. 7 (a) to (c) show a false eyelash structure according to another embodiment of the present invention.

BEST MODE

Embodiments of the present invention will now be described in more detail.
False Eyelash Structure
A false eyelash structure of the present invention includes an artificial hair part and an attachment part, and the artificial hair part and the attachment part are integrally formed by injection molding and have excellent shape stability and elasticity.
The artificial hair part is formed on one surface of the attachment part, and has 3 to 100 artificial hairs. The artificial hairs may have a length from 0.1 mm to 50 mm, preferably from 2 mm to 25 mm. The artificial hairs may have a thickness from 0.05 mm to 2 mm, preferably from 0.2 mm to 0.9 mm. The artificial hair part may be a combination of artificial hairs having one or more properties or shapes. By way of example, the artificial hairs may be linear or curved, and a plurality of adjacent artificial hairs may cross each other or may be disposed in zigzag arrangement. The artificial hairs may have a polygonal cross-section, such as a triangular cross-section, a rectangular cross-section, and a pentagonal cross-section, and may have a circular or elliptical cross-section, without being limited thereto. When the artificial hairs have a polygonal cross-section, the artificial hairs may have a rounded corner. The artificial hairs may have a cross-sectional area of from 0.002 mm²to 5 mm⁵, preferably from 0.03 mm²to 0.8 mm².
FIG. 2 is a plan view of a false eyelash structure according to one embodiment. Referring to FIG. 2, an attachment 20 is provided to attach artificial eyelashes to the skin of a person, and may be linear as shown in FIG. 2 (a) or may be curved as shown in FIG. 2 (b). The attachment part has a length of 20 mm to 50 mm, preferably 30 mm to 40 mm. The attachment part may have a thickness of 0.05 mm to 2 mm, preferably 0.2 mm to 0.9 mm.
Referring to FIGS. 3 (a) and (b), when the attachment part is curved, the attachment part may have a first curved portion 21 and second curved portions 23 or linear portions 25 extending from opposite ends of the first curved portion.
When the attachment part has a first curved portion and second curved portions as shown in FIG. 3 (a), the first curved portion 21 and each of the second curved portions 23 may have different curvatures and curvature directions.
The artificial hair part and the attachment part may be thermally processed, and may be formed by injection molding using a thermoplastic elastomer (TPE) resin having a flexible and resilient property similar to rubber or resin compositions containing the thermoplastic elastomer resin.
The thermoplastic elastomer resin may be an olefin, styrene, amide, ester, urethane, silicone, or PVC-based thermoplastic elastomer resin. Preferably, the thermoplastic elastomer resin is a styrene or olefin-based thermoplastic elastomer resin.
The styrene-based thermoplastic elastomer resin is an elastic material most similar to rubber and has a two-phase structure including a soft segment endowing elasticity and a hard segment endowing strength. Examples of the styrene thermoplastic elastomer resin include poly(styrene-b-butadiene-b-styrene) (SBS), poly(styrene-b-isoprene-b-styrene) (SIS), poly(styrene-b-ethylene-b-butadiene-b-styrene) (SEBS), and poly(styrene-b-ethylene-b-propylene-b-styrene) (SEPS).
The olefin-based thermoplastic elastomer resin may be an ethylene propylene diene monomer (EPDM), which includes a soft segment and a hard segment of polypropylene. The soft segment shows unique rubber elasticity of the thermoplastic elastomer. During molding, the hard segment is melted and plasticized to exhibit unique molding properties, and then is cured again to prevent plastic deformation.
In one embodiment, the thermoplastic elastomer resin has a glass transition temperature Tg of 80° C. or less to increase flexibility of products. More preferably, the thermoplastic elastomer resin has a glass transition temperature Tg of 50° C. to 60° C.
The artificial hair part and the attachment part may further include additives, such as pigments, fillers, heat stabilizers, and the like.
In a post-process after injection molding, the false eyelash structure may be subjected to surface treatment using a coating agent and a finishing agent, such as glittering additives for glittering effects.
In one embodiment of the invention, when injection molding is performed by a single stage, the artificial hair part and the attachment part are integrally formed with each other. Thus, the artificial hair part and the attachment part may include the same thermoplastic elastomer resin.
In another embodiment of the invention, when injection molding is performed by multiple stages, the attachment part may be formed of the same kind of thermoplastic elastomer resin as that of artificial hairs of one type constituting the artificial hair part. In other words, multistage injection molding is composed of primary injection molding and secondary injection molding. When the thermoplastic elastomer resin used in primary injection molding is different from the thermoplastic elastomer resin used in secondary injection molding, some of the artificial hairs constituting the artificial hair part can be formed of the thermoplastic elastomer resin different from that of the attachment part.
During multistage injection molding, the thermoplastic elastomer resins used in the respective injection molding stages may use pigment to have different colors. Accordingly, the artificial hair part may include a plurality of artificial hairs having different colors, and artificial eyelashes showing various colors can be provided. Moreover, properties of the attachment part and the artificial hair part or two types of artificial hairs constituting the artificial hair part may be partially adjusted by applying two or more thermoplastic elastomer resins having different properties. For example, in multistage injection molding using thermoplastic elastomer resins having different softness, the attachment part may be formed of a flexible soft elastomer and the artificial hairs may be formed of a relatively strong elastomer, thereby providing a product that can be conveniently worn and has firm artificial hairs.
As shown in FIG. 4, in another embodiment of the invention, a convex-concave pattern 30 is formed on at least one of the one surface and an opposite surface of the attachment part. When the false eyelash structure is attached to skin around the eye, the convex-concave pattern 30 imparts flexibility to the attachment part and increases a bonding area, whereby the false eyelash structure can be easily and naturally attached to a skin surface. As shown in FIG. 4 (d), the convex-concave pattern may include a concave portion or a convex portion having a rectangular, triangular, or circular shape.
Method of Manufacturing False Eyelash Structure
In one embodiment of the invention, the method of manufacturing a false eyelash structure includes preparing a mold; preparing a thermoplastic elastomer resin; and performing injection molding by introducing the thermoplastic elastomer resin into an injection molding machine on which the mold is mounted.
In FIG. 1, (a) to (e) show molds used in the method of manufacturing a false eyelash structure according to the embodiment of the present invention. Referring to FIG. 1, (a) and (b) show molds forming artificial hair parts 11, 13, and (c) shows a mold in which a first artificial hair part 11 and a second artificial hair part 13 are combined. A false eyelash structure including the first artificial hair part 11 and the second artificial hair part 13 having different colors or properties may be manufactured using a dual-injection molding machine. The false eyelash structure may be manufactured through a single process using a property. In FIG. 1, the mold is a mold according to one embodiment of the invention, but the present invention is not limited thereto. The mold may be manufactured in various forms by reflecting desired designs of artificial eyelashes, that is, shapes of the attachment part 20 and the artificial hair part 10.
In injection molding, the mold may have a temperature of 0° C. to 80° C.
The injection molding machine may include an injection portion, an intermediate portion, and a nozzle, and, in injection molding, the injection portion may have a temperature of 80° C. to 100° C., the intermediate portion may have a temperature of 150° C. to 250° C., and the nozzle may have a temperature of 200° C. to 300° C.
In injection molding, mold pressure may range from 5 MPa to 40 MPa, back pressure may range from 20 MPa to 80 MPa, and injection pressure may range from 30 MPa to 100 MPa.
The injection molding machine may have a screw RPM of 30 RPM to 100 RPm, and an injection time may range from 0.5 seconds to 20 seconds.
According to another embodiment of the invention, the manufacturing method corresponds to multistage injection molding using at least one mold and at least one thermoplastic elastomer resin.
In the case of a manufacturing method including a two-stage injection molding process, the method may include: preparing a first mold; preparing a first thermoplastic elastomer resin; performing primary injection molding by introducing the first thermoplastic elastomer resin into an injection molding machine on which the first mold is mounted; providing a false eyelash structure manufactured by the primary injection molding to a second mold; and performing secondary injection molding by introducing a second thermoplastic elastomer resin into an injection molding machine on which the second mold is mounted. Referring to FIG. 1, by way of example, after an artificial eyelash structure is prepared through primary injection molding in a first mold of FIG. 1 (a), the manufactured artificial eyelash structure may be provided to a second mold of FIG. 1 (b) and may be subjected to secondary injection molding, thereby providing a finished artificial eyelash structure.
In another embodiment of the invention, a false eyelash structure may be manufactured using a two-stage injection molding machine or a multistage injection molding machine while using a single mold in multistage injection molding. In one example, after the mold of FIG. 1 (c) is mounted on an injection molding machine having a double nozzle, a false eyelash structure may be manufactured by applying two types of thermoplastic elastomer resins.

MODE FOR INVENTION

FIG. 5 is a picture of false eyelash structures having various shapes manufactured through the method according to the present invention. The method according to the invention provides excellent processibility, excellent economic efficiency and uniform quality in manufacture of false eyelash structures, and the false eyelash structures manufactured by the method have excellent properties in terms of shape stability and elasticity.
FIG. 6 shows a method of manufacturing a false eyelash structure according to another embodiment of the present invention. In this embodiment, two false eyelash structures manufactured by injection molding according to the invention may be coupled to each other such that an artificial hair part can be realized in various ways.
FIGS. 7( a) to 7(c) show false eyelash structures according to other embodiments of the present invention. The false eyelash structures having artificial hair parts whose shapes are complex can be repeatedly manufactured through injection molding using the manufactured mold.
It should be understood by those skilled in the art that various modifications, variations, and alterations can be made without departing from the spirit and scope of the present invention.

Claims

1. A method of manufacturing a false eyelash structure, comprising:

preparing a mold;

preparing a thermoplastic elastomer resin; and

performing injection molding by introducing the thermoplastic elastomer resin into an injection molding machine on which the mold is mounted.

2. The method according to claim 1, wherein the injection molding is multistage injection molding using at least one mold and at least one thermoplastic elastomer resin.

3. The method according to claim 2, wherein the method involves two-stage injection molding, and the method comprises:

preparing a first mold;

preparing a first thermoplastic elastomer resin;

performing primary injection molding by introducing the first thermoplastic elastomer resin into an injection molding machine on which the first mold is mounted;

providing a false eyelash structure manufactured by the primary injection molding to a second mold; and

performing secondary injection molding by introducing a second thermoplastic elastomer resin into an injection molding machine on which the second mold is mounted.

4. The method according to claim 3, wherein the first thermoplastic elastomer resin and the second thermoplastic elastomer resin are the same type of thermoplastic elastomer resin.

5. The method according to claim 3, wherein the first thermoplastic elastomer resin and the second thermoplastic elastomer resin have different properties or colors.

6. The method according to claim 1, wherein, in the injection molding, the mold has a temperature from 0° C. to 80° C.

7. The method according to claim 1, wherein the injection molding machine comprises an injection portion, an intermediate portion, and a nozzle, and, in the injection molding, the injection portion has a temperature of 80° C. to 100° C., the intermediate portion has a temperature of 150° C. to 250° C., and the nozzle has a temperature of 200° C. to 300° C.

8. The method according to claim 1, wherein the mold has a pressure of 5 MPa to 40 MPa, and an injection pressure ranges from 30 MPa to 100 MPa.

9. The method according to claim 1, wherein the injection molding machine has a screw RPM of 30 RPM to 100 RPM.

10. The method according to claim 1, wherein the injection molding has an injection time of 0.5 seconds to 20 seconds.

11. A false eyelash structure comprising: an artificial hair part and an attachment part integrally formed through injection molding.

12. The false eyelash structure according to claim 11, wherein the artificial hair part and the attachment part comprise an olefin, styrene, amide, ester, urethane, silicone, or PVC-based thermoplastic elastomer resin, the thermoplastic elastomer resin having a glass transition temperature of 80° C. or less.

13. The false eyelash structure according to claim 11, wherein the artificial hair part is formed on one surface of the attachment part and comprises a plurality of artificial hairs of at least one type.

14. The false eyelash structure according to claim 12, wherein the artificial hair part comprises at least two types of artificial hairs having different colors or properties.

15. The false eyelash structure according to claim 12, wherein the artificial hair part comprises 3 to 100 artificial hairs, the artificial hairs having a length of 0.1 mm to 50 mm and a thickness of 0.05 mm to 2 mm.

16. The false eyelash structure according to claim 11, wherein the attachment part is linear or curved, and has a length of 20 mm to 50 mm and a thickness of 0.05 mm to 2 mm.

17. The false eyelash structure according to claim 16, wherein the attachment part is curved, and comprises a first curved portion and second curved portions or linear portions extending from opposite ends of the first curved portion.

18. The false eyelash structure according to claim 17, wherein the first curved portion and the second curved portion have different curvatures or curvature directions.

19. The false eyelash structure according to claim 13, wherein the attachment part is formed of the same type of thermoplastic elastomer resin as that of one type of the artificial hairs constituting the artificial hair part.

20. The false eyelash structure according to claim 13, wherein the attachment part has a convex-concave pattern formed on at least one of the one surface and an opposite surface thereof.