JPH10179249A - Rod-like cosmetic molding die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die capable of easily releasing a molded rod-like cosmetic and obtaining the high-quality rod-like cosmetic rarely stuck with a mold releasing agent on the surface by forming the die with a resin material containing the mold releasing agent. SOLUTION: Resin pellets are put into a heated kneading tube, and a screw is rotated to completely melt them. A mold releasing agent is added, and the mixture is kneaded into a melted state. The melted resin containing the mold releasing agent is filled into a die. The die is disassembled into an outer die and an inner die after the melted resin is hardened. A resin die is fitted to a center disk 5 of a lipstick container. The large-diameter section 1 of the resin die is coupled with the end section of the center dish 5. A melted cosmetic is filled into the resin die from an opening section disposed at the bottom section of the center dish 5. The resin die is removed after the cosmetic is solidified. When the melted high-temperature cosmetic is filled, the mold releasing agent is eluted from the inner face of the resin die. The same mold releasing effect is exerted as the case that the mold releasing agent is applied on the inner face of the resin die in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin mold used for molding a stick-shaped cosmetic such as lipstick.

[0002]

Generally, stick cosmetics such as lipstick are produced by filling a molten material into a resin mold and cooling and solidifying it. At this time, a release agent such as silicone oil is previously applied to the inner surface of the resin mold in order to enhance the releasability of the obtained lipstick.

Incidentally, the release agent needs to be thinly and uniformly applied to the inner surface of the resin mold. This is because if the amount of application is too large, the release agent remains on the surface of the lipstick and significantly lowers the commercial value, and if the release agent is applied unevenly, that is, there are places where it is not applied This is because, at the time of release, an excessive force is applied to the lipstick, which may cause breakage. However, in practice, it is very difficult to apply the release agent thinly and uniformly on the inner surface of the resin mold.

[0004] Accordingly, the problem to be solved by the present invention is to provide a high-quality bar-shaped cosmetic composition which can easily release a molded bar-shaped cosmetic composition and hardly adheres a releasing agent to the surface. An object of the present invention is to provide a mold for molding a stick-shaped cosmetic obtained.

[0005]

An object of the present invention is to provide a mold for molding a melted cosmetic into a rod, wherein the mold is made of a resin material containing a release agent. The problem is solved by a mold for molding cosmetics. That is,
In a mold for molding a rod-shaped cosmetic made of a resin material containing a release agent, the release agent elutes from the inner surface.
Therefore, the same release effect as when the release agent is applied to the inner surface of the mold in advance is exhibited, and the rod-shaped cosmetic formed in the mold can be easily released.

In particular, when the molten cosmetic is filled, the heat from the filled cosmetic is uniformly applied to the inner surface of the mold without bias. Therefore, the release agent also uniformly dissolves from the inner surface of the mold. In other words, the state is equivalent to a state where the release agent is uniformly applied to the inner surface of the mold. Therefore, when the mold is released, no excessive force is applied to the molded bar-shaped cosmetic, and troubles such as breakage hardly occur.

Further, in the mold for molding a stick-shaped cosmetic of the present invention, the amount of the release agent released when the molten cosmetic is filled is the minimum necessary. In other words, the release agent dissolves only in an amount necessary for releasing the rod-shaped cosmetic formed in the mold. Therefore, as in the case where the release agent is applied to the inner surface of the mold in advance, the applied amount of the release agent is too large,
There is no problem that it remains on the surface of the stick-shaped cosmetic, and a high quality product can be obtained.

[0008] In the mold for molding a stick-shaped cosmetic of the present invention, the content of the release agent is preferably 0.01 to 5 wt%, particularly preferably 0.1 to 3.0 wt%. . When the content of the release agent is within this range, the release of the stick-shaped cosmetic is extremely smooth, and the amount of the release agent adhered to the surface of the stick-shaped cosmetic can be extremely small. . The release agent contained in the resin material is preferably a liquid at room temperature. For example, hydrocarbons such as liquid paraffin and squalane, castor oil, jojoba oil, esters such as fatty acid monoesters and diesters, silicone oils such as dimethyl silicone and silicone-based activators (including silicone oil derivatives), perfluoropoly Fluorine compounds such as a fluorine-based lubricant such as ether are preferred.

Examples of the resin include polystyrene, high impact polystyrene, acrylonitrile-styrene resin (AS resin), acrylonitrile-butadiene-styrene resin (ABS resin), polycarbonate, polypropylene, polyacetal, polyethylene, polymethylpentene, polyethylene terephthalate and the like. Polyester, polyfluoroolefin, nylon resin and the like can be used.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A rod-shaped cosmetic molding die (hereinafter, simply referred to as a resin mold), which will be described as an embodiment of the present invention, is used for molding a molten cosmetic into a rod shape. And made of a resin material containing a release agent. Embodiments of the present invention will be described in more detail with reference to FIGS. 1 is a perspective perspective view of the resin mold, FIG. 2 is a cross-sectional view of the resin mold, FIG. 3 is a conceptual diagram of a resin mold manufacturing apparatus, and FIG. 4 is a cross-sectional view showing a state in which a cosmetic is filled in the resin mold. It is.

The resin mold of this embodiment has a cap shape as can be seen from FIGS. A large-diameter portion 1 is formed on the opening side of the resin mold. The large-diameter portion 1 is fitted to the middle plate end of the lipstick container as described later. In the present embodiment, a resin mold having a tapered surface on the distal end side is used as the resin mold, but the present invention is not limited to this.

The resin mold of this embodiment includes polystyrene, high impact polystyrene, acrylonitrile-styrene resin (AS resin), acrylonitrile-butadiene-styrene resin (ABS resin), polycarbonate, polypropylene, polyacetal, Polyester such as polyethylene, polymethylpentene, polyethylene terephthalate, polyfluoroolefin, nylon resin and the like are used. As the release agent, hydrocarbons such as liquid paraffin and squalane,
Esters such as fatty acid monoesters and diesters such as castor oil, jojoba oil, and isostearyl malate; silicone oils (including silicone oil derivatives) such as dimethyl silicone and silicone-based activators; and fluorine-based materials such as perfluoropolyether Fluorine compounds such as lubricants are used. However, the content of the release agent is 0.0
It is 1-5 wt%, especially 0.1-3.0 wt%.

The above resin mold is manufactured by using an apparatus shown in FIG. That is, the resin pellets are put into the heated kneading tank 2 and the screw 3 is rotated to completely melt the resin pellets. Thereafter, a release agent is added and kneaded in a molten state.
After the kneading process is sufficiently performed, the molten resin containing the release agent is filled in the mold 4 for molding the resin mold. After the filled molten resin is solidified, the mold 4 is decomposed into an outer mold and an inner mold, whereby a resin mold as shown in FIGS. 1 and 2 is obtained.

The resin mold of the present embodiment is used as shown in FIG. 4 when molding a lipstick. First, the resin mold is attached to the inner plate of the lipstick container (a member whose base end side is fixed and which displaces inside the lipstick container as the lipstick projects and retracts). At this time, the large diameter portion 1 of the resin mold is fitted to the end of the inner plate 5. Next, the melted cosmetic is filled into the resin mold from the opening provided at the bottom of the inner plate 5. After the filled cosmetic is solidified, the resin mold is removed to obtain a lipstick molded into a predetermined shape.

Incidentally, the resin mold of the present embodiment is made of a resin material containing a release agent as described above. Therefore, when the molten high-temperature cosmetic is filled, the release agent elutes from the inner surface of the resin mold. As a result, the same release effect as when the release agent is applied to the inner surface of the resin mold in advance is exhibited, and the lipstick molded in the resin mold can be easily released.

In addition, since the release agent uniformly dissolves from the inner surface of the resin mold, the release agent cannot be applied to the molded lipstick at the time of release, similarly to the case where the release agent is uniformly applied to the inner surface of the resin mold. No force is applied, and troubles such as breakage are unlikely to occur. Furthermore, in the resin mold of the present embodiment, only a necessary amount of the release agent is dissolved for releasing the lipstick molded therein. Therefore, there is no problem that the release agent remains on the surface of the lipstick, and a high-quality product can be obtained.

[0017]

Example 1 An ABS resin (trade name: Asahi Kasei Stylax IM-10) was used as a resin material, and a silicone-based activator was used as a release agent, and several types of lipstick moldings having different release agent contents were used. A resin mold was manufactured. Then, lipsticks were molded using the respective resin molds, and the relationship between the content of the release agent and the releasability of the lipstick and the relationship between the content of the release agent and the appearance of the lipstick were examined. The results are as follows. The evaluation of the appearance was obtained by visually observing the appearance of the lipstick surface after release (the same applies to Examples 2 to 4). Release agent content Releasability Appearance 0% Partially defective Partially defective 0.5% Good Good 1.0% Good Good 2.0% Good Good 0% * Good Partially defective A release agent is applied to the inner surface by a conventional method.

[0018]

Example 2 A polycarbonate resin (trade name: Iupilon H-400 N606) was used as a resin material, and dimethyl silicone was used as a release agent. Several types of lipstick resin dies having different release agent contents were used. Made. Then, lipsticks were molded using the respective resin molds, and the relationship between the content of the release agent and the releasability of the lipstick and the relationship between the content of the release agent and the appearance of the lipstick were examined. The results are as follows. Release agent content Release property Appearance 0% Partially defective Partially defective 0.1% Good Good 0.5% Good Good 1.0% Good Good 0% * Good Partially defective A release agent is applied to the inner surface by a conventional method.

[0019]

EXAMPLE 3 The same polycarbonate resin as in Example 2 was used as the resin material, the same silicone-based activator as in Example 1 was used as the release agent, and several types of lipstick molding resin molds having different release agent contents were used. Was made. Then, lipsticks were molded using the respective resin molds, and the relationship between the content of the release agent and the releasability of the lipstick and the relationship between the content of the release agent and the appearance of the lipstick were examined. The results are as follows. Release agent content Release property Appearance 0% Partially defective Partially defective 0.1% Good Good 0.5% Good Good 1.0% Good Good 0% * Good Partially defective A release agent is applied to the inner surface by a conventional method.

[0020]

Example 4 The same polycarbonate resin as in Example 2 was used as a resin material, and diisostearyl malate was used as a release agent, and several types of lipstick resin molds having different release agent contents were produced. . Then, lipsticks were molded using the respective resin molds, and the relationship between the content of the release agent and the releasability of the lipstick and the relationship between the content of the release agent and the appearance of the lipstick were examined. The results are as follows. Release agent content Releasability Appearance 0% Partially defective Partially defective 0.1% Good Good 0.5% Good Good 0% * Good Partially defective However, the * column shows the conventional method on the resin mold inner surface. And a release agent is applied.

[0021]

[Characteristics] The resin mold of the present embodiment is superior to the prior art in both the releasability and appearance of the lipstick molded using it.

[0022]

According to the present invention, it is possible to easily release a molded rod-shaped cosmetic from a mold, and to obtain a high-quality rod-shaped cosmetic having almost no adhesion of a release agent to the surface.

[Brief description of the drawings]

FIG. 1 shows a mold (resin mold) for molding a stick-shaped cosmetic according to the present invention.
Perspective perspective view of

FIG. 2 is a sectional view of a resin mold according to the present invention.

FIG. 3 is a conceptual diagram of a resin mold manufacturing apparatus.

FIG. 4 is a cross-sectional view showing a state in which a cosmetic is filled in a resin mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Large diameter part of resin type 2 Kneading tank 3 Screw 4 Mold 5 Middle plate of lipstick container

Claims (3)

[Claims] 1. A mold for molding a melted cosmetic into a rod, comprising a resin material containing a release agent. 2. The content of the release agent is 0.01 to 5 wt%.
The mold for molding a stick-shaped cosmetic according to claim 1, wherein: 3. The rod-shaped makeup according to claim 1, wherein the release agent is selected from the group consisting of hydrocarbons, esters, silicone oil, and fluorine compounds. Mold for injection molding.