JP2004231221A - Container for hair dye - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayer container which prevents a tube container from bursting by being expanded by oxygen generated from a hair dye. <P>SOLUTION: In this container for the hair dye, the hair dye containing hydrogen peroxide is infilled into the multilayer container having at least two ethylene-vinyl alcohol copolymer layers or an ethylene-vinyl alcohol copolymer layer into which denatured polyethylene is blended. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multi-layer container, and more particularly, to a multi-layer container in which a tube container is prevented from expanding and bursting with oxygen gas generated by decomposition of hydrogen peroxide in a stored hair dye.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a hair dye tube is usually sold as a set in which one agent and two agents are housed in separate tube containers, respectively, and are paired. The first agent is mainly composed of an oxidation dye, and is housed in a sealed metal tube that is impermeable to gas and liquid. The second agent is mainly composed of hydrogen peroxide, which has the purpose of oxidatively polymerizing the dye of the first agent. It is a content to be a component. Conventionally, in the second agent, an interior tube made of a synthetic resin having excellent gas permeability and having a property of allowing gas to pass therethrough but not a liquid is provided inside a metal exterior tube. This is because when the content mainly composed of hydrogen peroxide directly contacts the inner surface of the metal outer tube, the inner surface of the outer tube reacts with the content mainly composed of hydrogen peroxide, and the inner surface is corroded. To do that.
[0003]
FIG. 7 shows such a conventional double tube. In the figure, reference numeral 50 denotes an exterior tube made of a metal material such as aluminum and having a mouth, a shoulder, and a body integrally formed. Inside the outer tube 50, an inner tube 51 made of a synthetic resin such as polyethylene and having a mouth, a shoulder, and a body integrally formed is fitted. Then, as shown in FIG. 7, the mouth end 51a of the inner tube 51 is bent outward so as to cover and cover the end 52 of the outer tube 50, and the inner plug 53 is press-fitted from above. A cap 54 is screwed to the inner plug 53. In this way, by bending the mouth end 51a outward and covering it, the contents are prevented from adhering to the mouth portion 52 of the metal portion and the mouth portion 52 is prevented from being corroded.
[0004]
Conventionally, the outside and the inside are shut off by an exterior tube 50 of aluminum or the like, so that oxygen generated by decomposition of hydrogen peroxide of the hair dye is intentionally released from the tube bottom 55 to the outside. Alternatively, by discharging the double tube to the outside through the gap between the inner plug 53 of the mouth and the outer tube 50, the double tube is prevented from being filled and pressurized with oxygen and ruptured. For example, the hem 55 is not heat-sealed but is kept in contact, the content itself does not leak to the outside due to the adhesive force of the inner tube 51, and only oxygen generated from the content is transferred to the inner tube 51. And was released to the outside from the skirt 55.
[0005]
On the other hand, as shown in FIGS. 5 and 6, there is a tube container 60 which is less expensive than the double tube container 50 shown in FIG. 7 in terms of material and manufacturing cost. The resin forming the body 60a of the tube container 60 is such that the innermost layer is a polyethylene layer or a modified polyethylene layer 61, the intermediate layer is an ethylene-vinyl alcohol copolymer layer 62, and the outermost layer is a polyethylene layer or a modified polyethylene layer 63. Have been.
[0006]
[Problems to be solved by the invention]
However, in the conventional double tube container shown in FIG. 7, the interior tube 51 needs to be installed inside the metal exterior tube 50. Has to be manufactured separately, and the manufacturing cost of the double tube is high. Further, in the tube container 60 as shown in FIGS. 5 and 6, when the contents mainly composed of hydrogen peroxide are filled, the intermediate ethylene-vinyl alcohol copolymer layer 62 becomes 1 Since this layer is a layer, the ethylene-vinyl alcohol copolymer layer 62 is affected by moisture from the inside of the contents, and thus has a drawback that the gas barrier property is reduced and the tube swells. Also, since the hair dye is set in the same small box with the first agent and the second agent as a set, when the tube of the second agent swells greatly, the aluminum tube of the first agent is pushed from the outside. Dents may occur. Then, there is a risk that the inner coat on the inner side is adversely affected, for example, cracks or deterioration occurs, and the aluminum comes into contact with the first agent to be corroded, hydrogen is generated, and the tube swells. Furthermore, when bad conditions, such as exposure to direct sunlight, overlap, the tube may be ruptured. For example, if it ruptures during transportation, it may contaminate other surrounding products, and if it ruptures at stores or at home, it may contaminate the surroundings. Also, if the cap is removed while the tube is swelled and the inside is pressurized, the contents may jump out. In addition, the gas barrier property is deteriorated by providing a conventionally known configuration, that is, providing only one ethylene-vinyl alcohol copolymer layer 62 shown in FIG. 6 in the intermediate layer, so that some means for maintaining the gas barrier property high. Was needed. Further, when the innermost layer 61 and the outermost layer 63 are only the modified polyethylene layers as in the conventional case, there is a disadvantage that the adhesive force is satisfied but the material cost is significantly increased.
[0007]
The present invention has been made in view of such a conventional problem, and there is no need to provide an interior tube in an exterior tube, the production cost is low, and the tube is produced by oxygen generated from a hair dye. An object of the present invention is to provide a low-cost multi-layer container that prevents expansion and rupture of the container and has a good balance between moisture permeability and oxygen permeability.
[0008]
[Means for Solving the Problems]
In order to solve this problem, a means for solving the problem according to the first aspect of the present invention is to provide at least two or more ethylene vinyl alcohol copolymer layers or an ethylene vinyl alcohol copolymer layer containing modified polyethylene. A hair dye container characterized by filling a hair dye containing hydrogen peroxide into a multilayer container having the same.
[0009]
According to a second aspect of the present invention, there is provided a hair dye container characterized in that at least the innermost layer and / or the outermost layer of the multilayer container is a polyethylene layer or a polyethylene layer containing modified polyethylene. .
[0010]
Means for solving the problem corresponding to the invention of claim 3 is that the amount of the modified polyethylene compounded is based on the weight of each layer of the ethylene-vinyl alcohol copolymer layer containing the modified polyethylene and the polyethylene layer containing the modified polyethylene. And 5% to 30%.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIG. FIGS. 1 and 3 are front views of a multilayer container according to a first embodiment of the present invention, which is a tube container 1. FIG. FIG. 3 is a drawing showing an enlarged cross-sectional view as viewed in the direction of arrow A in FIG. The tube container 1 is manufactured by a known method in which a tubular parison made of a synthetic resin material is molded by being inserted into a mold and expanding with compressed air. In FIG. 3, reference numeral 3 denotes a hair dye for the purpose of oxidatively polymerizing the dye of the first agent mainly composed of hydrogen peroxide. Commonly referred to as a second agent, the second agent is mainly composed of hydrogen peroxide. As described above, the tube container may be expanded and ruptured by oxygen generated by the decomposition of hydrogen peroxide. As a method for preventing this, the inventor has proposed a method using ethylene / vinyl alcohol copolymer. By combining at least two layers of the ethylene-vinyl alcohol copolymer layer containing the modified polyethylene or the modified polyethylene, the inner ethylene-vinyl alcohol copolymer layer is affected by moisture from the inside of the contents. Even if the gas barrier property of the resin deteriorates, at least one or more ethylene-vinyl alcohol copolymer layers are provided on the outside, so that oxygen entering from the outside can be shut off. A stabilized tube container in which the balance of oxygen permeability was maintained could be obtained.
[0012]
The layer configuration of the body 1a of the tube container 1 according to the present invention, which stores the second hair dye, will be described with reference to FIG. An ethylene / vinyl alcohol copolymer layer 5 is provided on the outside, a polyethylene layer 6 is provided on the outside, an ethylene / vinyl alcohol copolymer layer 7 is provided on the outside, and polyethylene 8 is provided on the outermost layer. The ethylene / vinyl alcohol copolymer layers 5 and 7 preferably have an ethylene content of 10 to 60 mol%, particularly preferably 25 to 50 mol%. As the polyethylene, for example, low-density polyethylene, medium-density polyethylene, linear low-density polyethylene, high-density polyethylene, metallocene-based polyethylene and the like are used, and linear low-density polyethylene is particularly preferable. Further, the modified polyethylene, polyethylene, acrylic acid, methacrylic acid, maleic acid, fumaric acid, unsaturated carboxylic acids such as itaconic acid or the anhydride thereof is mentioned by graft modification, especially maleic anhydride-modified acid modification Is preferred. The compounding ratio of the modified polyethylene is 5% to 30%, preferably 10 to 20%. The outermost layer may be 100% polyethylene.
[0013]
Further, as another embodiment, as shown in FIG. 4, in place of the above-mentioned layer constitution, the innermost layer is composed of polyethylene 14 containing modified polyethylene and ethylene-vinyl alcohol containing modified polyethylene on the outside. Copolymer 15, outer layer of polyethylene layer 16 containing modified polyethylene, outer layer of ethylene / vinyl alcohol copolymer layer 17 of modified polyethylene, and outermost layer of polyethylene 18 containing modified polyethylene It was done. The ethylene / vinyl alcohol copolymer layers 15 and 17 preferably have an ethylene content of 10 to 60 mol%, particularly preferably 25 to 50 mol%. The blending of the modified polyethylene has the effect of improving the strength between layers in particular and stabilizing the hem seal strength. When the blending ratio of the modified polyethylene is 5% or less, there is a problem that the interlayer strength decreases, and when the blending ratio is 30% or more, the production cost increases. As in the prior art, if only a modified polyethylene layer is used, adhesive strength can be obtained, but the material cost is significantly increased.Therefore, the present inventors have determined that the material cost can be reduced while satisfying the interlayer adhesiveness. In order to solve this problem, an effective amount of modified polyethylene was blended. When modified ethylene is contained in the ethylene / vinyl alcohol copolymer layer, there is an effect that the strength between layers is similarly improved.
[0014]
The thickness of the body 1a is 350-900 μm in total, and 180 μm＼10-80 μm＼70-80 μm＼10-80 μm＼80-130 μm is suitable from the inner layer, preferably, 180 μm＼30-60 μm＼70- 80 μm＼30-60 μm＼80-130 μm is preferred. It is considered that the thickness of the ethylene / vinyl alcohol copolymer layer in the range of 30 to 60 μm has high oxygen barrier properties. When the innermost layer of polyethylene has a thickness of 100 μm or less, there is a disadvantage that the strength at the time of sealing the skirt is reduced, and the thickness is preferably 100 μm or more. It is also possible to mix modified polyethylene in the ethylene / vinyl alcohol copolymer layer at about 20%. In the ethylene / vinyl alcohol copolymer layer containing the modified polyethylene, the ethylene / vinyl alcohol copolymer layer is used. The thickness may be the same as that of the single body. When the ethylene-vinyl alcohol copolymer layer is thick, the oxygen barrier property is increased, but the production cost is increased, and the feel of the body of the tube container is hardened. It is common practice to incorporate a colorant into the outermost layer of polyethylene 8. Note that, as an embodiment, a multilayer in which at least two or more ethylene-vinyl alcohol copolymer layers or an ethylene-vinyl alcohol copolymer layer containing modified polyethylene is provided as an intermediate layer excluding the innermost layer and the outermost layer. A container is preferable, but a multilayer container in which one layer is provided in the innermost layer or the outermost layer and another one or more layers are provided in the intermediate layer may be used.
[0015]
The hair dye containing hydrogen peroxide of the present invention is used as a second agent of an oxidative hair dye or a hair bleaching agent. When used at the time of mixing with the first agent containing a dye, an alkali agent, and the like, it can be used as an oxidative hair dye. In the case where a dye is not used, but is used by mixing with a first agent containing an alkali agent or the like, it can be used as a hair bleaching agent. The blending amount of hydrogen peroxide in the second part is preferably 0.1 to 9% by weight based on the total weight of the second part, and if less than 0.1% by weight, a good hair dyeing result or bleaching is obtained. No result is obtained, and if it exceeds 9% by weight, hair may be damaged. Furthermore, 2.0 to 6.0% by weight is particularly preferable, and by blending 2.0% by weight or more, excellent hair dyeing power or bleaching effect can be obtained. On the other hand, by setting the content to 6.0% by weight or less, the risk of hair damage is further reduced. Examples of the stabilizer incorporated in the second agent include one or two selected from phenacetin, acetanilide, oxyquinoline sulfate, sodium stannate, urea, 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof. The above is used. The compounding amount is 0.01 to 2% by weight. As the pH adjusting agent to be mixed with the second agent, for example, phosphoric acid, citric acid, sulfuric acid, acetic acid, lactic acid, tartaric acid and the like are used, and the pH of the second agent is adjusted to 2 to 6, preferably 3 to 5. Is done. The dosage form of the second agent is preferably a viscous one such as a cream or a gel, and the viscosity is 5,000 to 20,000 mPa · s, preferably 8,500 to 15,000 mPa · s. Other components contained in the second agent include a surfactant, an oil component, a water-soluble polymer compound, a viscosity modifier, a humectant, an antistatic agent, a hair softener, an antioxidant, an antiseptic, and a metal block. Agents, pigments, fragrances and the like.
(Prescription example of hair dye second agent)
Cream hair dye second agent weight%
Hydrogen peroxide 6
Cetanol 2
Sodium alkyl sulfate 0.5
Phenacetin 0.1
Edetic acid 0.5
Phosphoric acid Amount of purified water that becomes pH 3 Remainder
Specific embodiments according to the present invention include the following embodiments.
(1) First Embodiment Polyethylene layer blended with 10% modified polyethylene from the innermost layer / Ethylene vinyl alcohol copolymer layer blended with 20% modified polyethylene / Polyethylene layer blended with 10% modified polyethylene / The ethylene / vinyl alcohol copolymer layer containing 20% modified polyethylene / the outermost layer is a polyethylene layer containing 10% modified polyethylene. The modified polyethylene in the first embodiment is an adhesive acid-modified polyethylene based on low-density polyethylene or the like, and the polyethylene layer is a linear low-density polyethylene. Further, the ethylene content of the ethylene / vinyl alcohol copolymer layer is 29 mol%. The layer thickness is 180 microns / 40 microns / 80 microns / 50 microns / 130 microns from the inner layer.
(2) Second Embodiment Polyethylene layer blended with 20% modified polyethylene from the innermost layer / Ethylene vinyl alcohol copolymer layer blended with 20% modified polyethylene / Polyethylene layer blended with 20% modified polyethylene / An ethylene / vinyl alcohol copolymer layer containing 20% modified polyethylene / the outermost layer is a polyethylene layer containing 20% modified polyethylene. The modified polyethylene in the second embodiment is an adhesive acid-modified polyethylene based on low-density polyethylene or the like, and the polyethylene layer is a linear low-density polyethylene. Further, the ethylene content of the ethylene / vinyl alcohol copolymer layer is 29 mol%. The layer thickness is 180 microns / 40 microns / 80 microns / 50 microns / 130 microns from the inner layer.
(3) Third Embodiment Polyethylene layer containing 20% modified polyethylene / ethylene / vinyl alcohol copolymer layer / polyethylene layer containing 20% modified polyethylene / ethylene / vinyl alcohol copolymer layer from innermost layer / The outermost layer is a polyethylene layer containing 20% of modified polyethylene. The modified polyethylene in the third embodiment is an adhesive acid-modified polyethylene based on a low-density polyethylene or the like, and the polyethylene layer is a linear low-density polyethylene. Further, the ethylene content of the ethylene / vinyl alcohol copolymer layer is 44 mol%. The layer thickness is 180 microns / 40 microns / 80 microns / 50 microns / 130 microns from the inner layer.
(4) Fourth Embodiment From innermost layer, polyethylene layer / ethylene / vinyl alcohol copolymer layer blended with 20% modified polyethylene / polyethylene layer / ethylene vinyl alcohol copolymer layer blended with 20% modified polyethylene / The outermost layer is a polyethylene layer. In the fourth embodiment, the polyethylene layer is a linear low-density polyethylene, the ethylene / vinyl alcohol copolymer layer has an ethylene content of 29 mol%, and the modified polyethylene is a low-density polyethylene. Adhesive acid-modified polyethylene based on E.g. As a result of preparing a sample of the tube container having the layer configuration of the first, second, third or fourth embodiment, filling the second agent of the hair dye as a content and performing a storage test, the body portions of all the samples were obtained. No swelling was observed.
[0017]
Test conditions and test results of the storage test of the fourth embodiment are shown below.
(Test condition)
(1) Outer diameter of body of tube container: 25 mm, dimension below shoulder: 120 mm
{Circle around (2)} Layer thickness; 180 micron / 40 micron / 80 micron / 50 micron / 130 micron from the inner layer {circle around (3)} Moisture permeability: 0.5706 g / m2 · 24h
{Circle around (4)} Oxygen permeability: 1.00 ml / m2 • 24h • atm
{Circle around (5)} The aging test was carried out separately for two months at 50 ° C. and six months at 40 ° C.
(Test results)
After two months at 50 ° C. and six months at 40 ° C., the appearance of the body of the tube container was observed, but no swelling of the body was observed in any of the test samples. Further, as shown in FIG. 6, a tube container having a trunk portion composed of a modified polyethylene layer / ethylene / vinyl alcohol copolymer layer / modified polyethylene layer was tested under the same conditions as the storage test of the fourth embodiment. As a result, after 6 months at 40 ° C., the body of the tube container was greatly expanded. It is needless to say that the layer structure according to the present invention can be applied to a hair dye bottle container or a pouch container as shown in FIG. 2 as another embodiment other than the tube container.
[0018]
【The invention's effect】
As described above, according to the present invention, since the balance between the moisture permeability and the oxygen permeability in the tube container is good, the oxygen generated from the hair dye is effective in expanding and bursting the tube container. In addition, there is an effect that the material cost can be reduced because it is not necessary to provide the interior tube in the conventional exterior tube.
[Brief description of the drawings]
FIG. 1 is a front view showing a tube container according to the present invention.
FIG. 2 is a front view showing a bottle container according to the present invention.
FIG. 3 is an enlarged cross-sectional view of the body portion showing the layer configuration of the body portion of the tube container or bottle container according to the present invention (an enlarged cross-sectional view taken along the arrow A in FIGS. 1 and 2).
FIG. 4 is an enlarged cross-sectional view (an enlarged cross-sectional view as viewed in the direction of arrow A in FIGS. 1 and 2) of another embodiment showing a layer configuration of a body portion of a tube container or a bottle container according to the present invention.
FIG. 5 is a front view showing a conventional tube container.
FIG. 6 is an enlarged cross-sectional view (an enlarged cross-sectional view taken along the arrow X in FIG. 5) showing a layer configuration of a body portion of a conventional tube container.
FIG. 7 is a partially cutaway sectional view showing a conventional double tube container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube container 1a Body 2 Bottle container 2a Body 3 Hair dye 4 6 8 Polyethylene layer 5 7 Ethylene vinyl alcohol copolymer layer 14 16 18 Polyethylene layer blended with modified polyethylene 15 17 Ethylene blended with modified polyethylene Vinyl alcohol copolymer layer 50 Outer tube 51 Inner tube 60 Tube container 60a Body 61 Innermost layer 62 Ethylene / vinyl alcohol copolymer layer 63 Outermost layer

Claims (3)

A hair dye containing hydrogen peroxide is filled in a multilayer container having at least two or more ethylene / vinyl alcohol copolymer layers or an ethylene / vinyl alcohol copolymer layer containing modified polyethylene. Hair dye container. The hair dye container according to claim 1 or 2, wherein at least the innermost layer and / or the outermost layer of the multilayer container is a polyethylene layer or a polyethylene layer containing modified polyethylene. The amount of the modified polyethylene blended is 5% to 30% with respect to the weight of each of the ethylene-vinyl alcohol copolymer layer blended with the modified polyethylene and the polyethylene layer blended with the modified polyethylene. The hair dye container according to claim 1 or 2, wherein

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