JPH01313418A - Sheet bath material - Google Patents

Abstract

PURPOSE:To obtain a bathing agent composition of emboss-patterned sheetlike material, without sinking immediately after thrown into hot water, slightly attaching on hand even in a case of touched by wet hand and obtainable by a simple method, containing water-soluble polymer as a base material. CONSTITUTION:100 pts.wt. water-soluble, preferably further having heatgelling temperature, polymer such as methyl cellulose, hydroxyproylmethyl cellulose or hydroxyethylmethyl cellulose as base material is mixed with 0.1-200 pts.wt. in a total amount of bath liquid agent component such as perfume, oil component, humectant and/or colorant, or other additives, then resultant sheet is shaped in embossed pattern to obtain a bathing agent composition having excellent properties such as slightly attaching on hand even touched by wet hand and readily handled, without immediately sinking after thrown into hot water and floating on the surface for a while to amuse eyes and dissolving in short time after sinking.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sheet-shaped bath agent composition that enhances the effectiveness of bathing by adding it to hot water in a bathtub.

(Prior Art) Traditionally, in order to enhance the benefits of bathing, such as a feeling of comfort, refreshment, or freedom, bath additives containing ingredients such as bath air fresheners have been added to bath water. There is. Various forms of such bath additives are known, but one that uses a water-soluble polymer molded product containing air bubbles has been proposed in order to be particularly aesthetically pleasing and to entertain viewers. (Unexamined Japanese Patent Publication No. 62-8143)
Publication No. 2).

(Problem to be solved by the invention) However, with bath additives made of water-soluble polymer moldings containing air bubbles, they float on the surface without sinking immediately after being poured into hot water, but when touched with wet hands, they float on the surface. Easy to adhere to hands1
There is a problem in that it becomes difficult to pour each sheet into hot water. In addition, in order to make a molded article containing air bubbles, an aqueous solution containing a water-soluble polymer is stirred in advance to include air bubbles in the solution.
Next, methods such as solution casting have been adopted to form the material into a sheet, but the problem is that the air bubbles disappear over time, making it difficult to maintain a constant density of the air bubbles, and the stirring operation is also very troublesome. .

(Means for Solving the Problems) The present inventors have developed a system that does not sink even immediately after being poured into hot water.
In order to obtain a sheet-like bath agent composition that does not easily stick to hands even when touched with wet hands and can be obtained by a simple method, we have developed a water-soluble polymer having an embossed pattern, preferably a sheet-like bath agent composition. The present invention was completed based on the discovery that the above object can be achieved by forming a sheet-like molded product using a water-soluble polymer having a thermal gelation temperature as a base material.

To explain this, the present invention is a sheet-like bath agent composition made of a water-soluble polymer containing bath agent components, and this sheet has an embossed pattern and preferably has a water-soluble polymer having a thermal gelation temperature. A compound consisting of molecules is used.

The form of the sheet-like bath agent composition in the present invention means a sheet-like object of any shape, and any form may be used as long as it is convenient to be added to hot water in a bathtub during bathing. For example, it is preferable to have a circular shape, an oval shape, or one cut into the shape of a leaf or flower petal, and any size can be selected from about 11 mm in diameter to about 10 mm in diameter.

Examples of water-soluble polymers used as a base material in the composition of the present invention include methylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose, and hydroxypropylcellulose. When the temperature of the aqueous solution thereof is increased, it thermally gels and becomes insoluble. do,
That is, it is desirable to use a material having a thermal gelation temperature. This is because sheets containing bath agent ingredients obtained using these substances do not sink when placed in hot water at around 40°C, which is the bathing temperature, but have a remarkable property of floating on the surface. by. The reason for this is not necessarily clear, but as the temperature increases, substances with a thermal gelation temperature become less soluble in water, and at the same time become less wettable, and as a result, they become more likely to float on the surface of water. Conceivable. However, this floating property cannot be said to be necessarily sufficient with a sheet produced simply by a conventional method, and it has been found that by applying an embossed pattern to this sheet, the floating property is significantly improved. This is thought to be due to the fact that air is trapped in the embossed pattern of the sheet, making it more difficult to get wet.

The bath agent components used in the present invention include cinnamon oil, cinnamon oil, geranium oil, citronella oil, rose oil,
Fragrances such as lavender oil, lemon oil, clove oil, bergamot oil, or their extracts; lanolin, liquid paraffin, olive oil, stearyl alcohol, etc., which remain in a thin film on the skin surface after bathing and prevent moisture from evaporating from the skin. Bath oil ingredients used for purposes such as moisturizing; moisturizing agents used to moisturize and retain moisture on the skin; glycerin, propylene glycol, sorbitol, polyethylene glycol, sodium lactate, polypeptide, etc.; Red No. 2, Red No. 3, Red Colorants such as No. 102, Blue No. 1, Blue No. 2, and Yellow No. 4 are used alone or in combination of two or more.

In addition to these bath agent ingredients, it also improves the solubility of molded products, prevents blocking when stacking molded products,
Alternatively, various surfactants, sugars such as simitose, fructose, etc. may be added freely to improve mold release properties during casting.

The total amount of these bath agent components or other additives is 0.1 to 200 parts by weight per 100 parts by weight of the water-soluble polymer.
Used in parts by weight.

The bath agent composition of the present invention can be prepared, for example, by dissolving or uniformly dispersing a water-soluble polymer having a thermal gelation temperature, bath agent components, and other necessary components in water, and casting the solution on the surface of a heated drum or the like. A sheet-like molded product with an embossed pattern can be obtained by drying it into a sheet and applying embossing by roll processing, or by coating it on the surface of an embossed carrier sheet and peeling it off from the sheet surface after drying. .

The depth of this embossed pattern is determined from the viewpoint of ensuring floatability when the sheet-like material of the present invention is placed in hot water and preventing adhesion when touched with wet hands, for example, when embossing is performed by roll processing. The depth of the mold pattern used is 7.
When coating the embossed carrier sheet surface with 0 to 300 IIm, the depth is 20 to 100 IIm. It is preferable to use one with a pattern of

The thickness of the obtained sheet-like molded product is usually about 10 to 70 mm before embossing, and about 50 to 300 mm after embossing. It is desirable that the thickness be approximately the same.

This sheet-like molded product can be formed into any suitable shape by cutting or punching, or it can be perforated so that it can be cut to a suitable size for use.

Hereinafter, specific embodiments of the present invention will be explained using Examples and Comparative Examples, but the present invention is not limited to these Examples. All parts in the examples are by weight.

(Example) A liquid containing the following water-soluble polymer and each component listed in the table was cast on a glass plate, dried in a blow dryer at 60°C, and then peeled off to a thickness of approximately 40°C. A sheet-like molded product was obtained. Add part of this molding to a depth of approximately 15 mm.
By passing it through an embossing roll having a mesh pattern of 011n, a sheet having an embossed pattern having a total film thickness of about 160 mm was obtained. The first sheet before embossing thus obtained and the sheet having an embossed pattern were each punched out into a petal shape with a maximum diameter of about 20III11 to obtain a sheet bath agent.

Pick up each sheet one by one with tweezers and place them in hot water at approximately 40°C. Observe how they float on the hot water surface and how each sheet adheres to wet hands. The time taken to finish was measured and the results are also listed in the table.

Water-soluble polymer: Hydroxypropyl methylcellulose (manufactured by Shin-Etsu Chemical, Metrose 60SH50, gelling temperature approximately 55°C,
HPMC)・Hydroxyethylmethylcellulose (same as above, Metrose 5EB4000, gelling temperature approx. 55
°C, abbreviated as HPMC) ・Polyvinyl alcohol (same as before, Shin-Etsu Poval P-18, abbreviated as PVA) = 7- ・Pullulan (■ Hayashibara Biochemical Research Institute, PI-20) ・Carboxymethyl cellulose sodium (Daiichi Kogyo Seiyaku Co., Ltd.) (Cellogen F-7A, abbreviated as CMC-Na) As is clear from the results in the table, when a water-soluble polymer with a thermal gelation temperature is used, without embossing,
Although the buoyancy was not sufficient when added to hot water, the embossed pattern of the present invention had sufficient buoyancy and quickly dissolved after sinking. Moreover, even when touched with wet hands, there was almost no adhesion. However, when using a water-soluble polymer that does not have a thermal gelation temperature, even when using a polymer with an embossed pattern, the buoyancy was not sufficient.

(Effects of the Invention) The sheet-shaped bath composition according to the present invention does not stick to hands even when touched with wet hands, and is easy to handle.It also does not sink immediately when poured into hot water, but floats on the surface for a while. It has excellent visual appeal and dissolves in a short period of time once it sinks.

Claims (1)

[Scope of Claims] 1. A sheet-shaped bath agent composition comprising a water-soluble polymer having an embossed pattern as a base material. 2. The sheet-like bath agent composition according to claim 1, wherein the water-soluble polymer has a thermal gelation temperature. 3. The sheet-like bath agent composition according to claim 1, wherein the total amount of bath agent components or other additives is 0.1 to 200 parts by weight based on 100 parts by weight of the water-soluble polymer.