JPH04218599A - Continuous preparation of low-density soap bar - Google Patents

Abstract

PURPOSE: To obtain white toiletry rod soap economically and continuously without using an opacifier, a whitening agent, or a brightener by a method in which neat soap molten blocks of coconut oil etc., are supplied with air white being high-shear-mixed, molded, and cooled.

CONSTITUTION: Neat soap molten blocks composed of (A) 10-50% coconut oil, (B) 50-90% beef tallow, and (C) 28-35% water are supplied to a high-shear mixer actuated continuously to be treated with air introduced continuously at 620 kPa (90 psi). Next, soap is cast into a rod soap production frame, cooled, cut, marked, and packed to continuously obtain soap whose specific gravity is regulated within 0.5-0.9.

COPYRIGHT: (C)1992,JPO

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention has a specific gravity of 0.5 to 0.
The present invention relates to a method for the continuous preparation of low-density bar soaps adjustable in a range of 9, in particular for the economical production of white cosmetic bar soaps without the use of opacifiers, whiteners or brighteners; A method of increasing volume and an acceptable water content in finished bar soaps is directed.

0002

BACKGROUND OF THE INVENTION Various methods are known for preparing aerated bar soaps by incorporating air into the soap composition. These methods range from simply mechanical agitation of the soap in a crutcher to methods that require specialized equipment and, in some cases, specialized formulations to produce a commercially acceptable product. . Representative prior art methods include: 1. Air is bubbled through the molten soap while it is in the crutcher, for example by reversing the rotation of the central stirring mechanism. 2. Schulerud US Patent No. 2
Air is introduced into the partially dried soap chips at 46.1°C (115°F) using a modified soap dispenser disclosed in US Pat. 3. Commercially available Mazzoni "Float-o-matic"
(Mazzoni 'Float-O-matic')
Discharge machine. 4. As disclosed in European Patent No. 90648,
Aeration by introducing gas and mixing by passing between two mutually displaceable surfaces. 5. After passing the molten soap through a heat exchanger, a flash chamber, and a continuous clutcher with the addition of air, the molten soap is
No. 2,295,594 of LS).

Methods 1, 2, 3 and 4 do not produce soap bars with the required uniform color, appearance or density. Methods 3, 4 and 5 require special equipment.

Other methods are described by Blair, US Pat. No. 1,780,330, Food
No. 2,210,924, Bodma
No. 2,398,776 of Marshall (Mar.
2,494,891, Hornong, 4,311,604, and Clark et al., 4,680,132.

[0005]

SUMMARY OF THE INVENTION One object of the present invention is to incorporate air into a soap bar to increase its volume and reduce the density of the soap bar to provide buoyancy.

It is also an object of the present invention to increase the acceptable water content within bar soaps.

A third object of the present invention is to incorporate air in a finely divided and uniformly distributed form into soap compositions in order to increase the light scattering effect of the soap compositions to achieve commercially acceptable results. It is possible to produce white soap.

[0008] A fourth object of the present invention is to use an economical continuous process that simplifies conventional soap processing methods to achieve superior performance over commercial bar soaps of similar composition.
2. Attributes)

The density of bar soap is 0.5 to 0.0 in terms of specific gravity.
It is also an object of the method of the present invention to incorporate air in a microadjustable manner into the soap composition so that the soap bar has a skin and color that is reproducible over a range of 9 and is consistent.

0010

1 and 2 are flow diagrams showing the steps of two embodiments of the method of the present invention.

The first method of the present invention will be explained with reference to FIG. In the first step, neat soap is prepared according to normal soap making procedures by batch or continuous process.
soap) is 10 to 50% coconut oil and 90% beef tallow.
A biophase of sodium soap of toilet soap quality is prepared with a composition of 50% to 50% and a water content of 28 to 35%.

Preservatives and/or chelating agents including, but not limited to, tetrasodium ethylenediaminetetraacetate and etidronic acid at 82.2 to 104.4°C.
Mix into molten neat soap in a crutcher maintained at a temperature of (180-220°F).

The molten soap mass is pumped into a water-cooled jacketed melt mixer and cooled to a temperature above the melting point of the mixture. A neat soap made by dissolving antioxidants, including but not limited to di-tertiary butyl para-cresol, into fragrances is manufactured by Goodway.
y) Add as pumped into the aerator hopper. The neat soap at this point preferably contains 30% water.

The mixer is operated continuously and the pressure is 620 k.
Air at 90 pounds per square inch is introduced into the soap mass under high shear mixing. This air-filled soap is cast into a soap making frame according to a conventional method.

The cooled soap is then cut and stamped with the desired logo and transported to a packaging machine (not shown).

The second method of the present invention will be explained with reference to FIG.

82.2 to 104.4°C (180 to 2
Preservatives and/or chelating agents are mixed into the molten neat soap in a crutcher maintained at a temperature of 20°F.

The antioxidant is dissolved in the fragrance and added in-line as the molten neat soap is transferred to the hopper of the Goodway aerator.

The mixer is operated continuously and the pressure is 620 k.
Air at 90 pounds per square inch is introduced into the soap mass under high shear mixing. The hot aerated soap is then filled directly into the soap mold, tray container or other packaging container. After the soap has cooled, seal and label the package.

When following the method of the invention, the density of the product can be adjusted by adjusting the air flow rate, mixer head speed, and Goodway mixer pump speed. Bar soaps with a water content of up to 30% can be obtained, whereas the water content of ordinary toilet soaps is 10 to 15%.

Whitening agents, brighteners or opacifiers such as titanium dioxide, which are usually added to improve the whiteness of cosmetic soaps, are not required as ingredients. This is because the finely dispersed air bubbles inside the soap scatter light and increase the R-value (whiteness value) of the soap.

Visually, the whiteness of the aerated bar soap is equal to or higher than that of an air-free bar soap containing 0.5% titanium dioxide.
acBeth) It can also be confirmed by reading a colorimeter. (0.
R- for air-free soap containing 5% titanium dioxide
The dispersion of finely divided air bubbles throughout the soap mass (with an R-value of 84.5 compared to 79.2 for aerated soap) combined with high shear mixing improves the homogeneity of the product. is significantly improved, resulting in a soap bar having a commercially acceptable appearance in terms of color and surface texture.
It is clear that the method of the invention uses less energy than conventional soap bars with current manufacturing methods and also allows for reduced formulation costs.

The method of the present invention is also advantageous in that the dispensing machine and dryer used in conventional bar soap production can be omitted.

[0024] Goodway mixer (The Good
way mixer) is manufactured by Goodway Industries, In
c. This is a commercially available mixer manufactured and sold by Bohemia, New York, USA.

The invention is illustrated by the following specific examples. However, these Examples do not limit the present invention.

[0026]

[Example 1] A neat soap with a composition of 85% beef tallow and 15% coconut oil and a water content of 31.5% was prepared for a total of 13.
The molten soap was continuously transferred to a Goodway mixer in which air was introduced to the soap under high shear mixing. The hot aerated soap was made into blocks, cooled, cut into bars, and packaged.

[0027]

EXAMPLE 2 A total of 13.6 kg (30 pounds) of 30% water neat soap consisting of sodium soap containing 70% beef tallow and 30% coconut oil was prepared. A sufficient amount of preservative was added to the molten soap. Soap fragrance was added at a rate of 1 to 1.4% and the soap was immediately transferred to a Goodway mixer where air was introduced into the molten soap under high shear mixing. This aerated soap was continuously transferred from the mixer, poured, and allowed to cool. The cooled soap was cut into bars and packaged.

[0028]

[Example 3] Neat soap with a composition of 85% beef tallow and 15% coconut oil, and a water content of 30%, totaling 13.6%
(30 lbs.) and aerated molten soap as in Examples 1 and 2. This hot air-filled soap was directly filled into a transparent packaging tray without a logo type, which was then cooled and sealed.

[0029] The bar soap produced according to the above method is
It had soap quality and its density was less than that of water (ie, the soap floats). This bar soap was very white and its volume was approximately 40% larger than that of a regular bar soap of the same weight. The performance of the bar soap thus obtained was determined in terms of improved longevity of the soap bar, rate of use up of the soap bar during use, improvement in form and skin maintenance and latherability during repeated use, compared to cosmetic bars of similar composition. Superior to soap and laundry bar soap.

[0030]

The method of the present invention improves the uniformity of soap bar composition so that the soap skin is uniform. The method of the invention finely disperses the air bubbles throughout the soap composition, thus resulting in a soap with excellent use properties and improved whiteness. Neat soaps with a typical moisture content of 28-35% can be continuously aerated by the process of the present invention so that the final soap bar contains the same range of moisture. This method shortens or eliminates the drying and dispensing steps in soap processing, thus simplifying soap production and consuming less energy than conventional soap production methods. The method of the invention makes the use of soap making equipment more flexible.

Although this invention has been described with respect to specific embodiments thereof, those skilled in the art will recognize that other modifications and changes to this invention may be made without departing from the spirit and scope of the invention. Probably.

[Brief explanation of the drawing]

FIG. 1 is a flow diagram illustrating the steps of one embodiment of the method of the invention.

FIG. 2 is a flow diagram showing the steps of another embodiment of the method of the invention.

Claims (4)

[Claims] 1. A method for continuously preparing aerated low-density soap of toilet soap quality, the method comprising: (a)
preparing a neat soap having a composition of 10 to 50% coconut oil and 50 to 90% beef tallow and a water content of 28 to 35%; (b) a high shear mixer continuously operating the molten soap mass; (c) processing the molten soap while continuously introducing air at a pressure of 620 kPa (90 psi); (d) casting the soap into a soap making frame;
e) A method characterized in that it consists of the steps of cooling, cutting, stamping and packaging the soap bar. 2. The method of claim 1, wherein preservatives, fragrances and other minor ingredients are added to the neat soap prior to aeration. 3. (a) adding a preservative to neat soap; (b) cooling the soap in a melt mixer to a temperature above the melting point of the soap; (c) adding antioxidants and fragrances. (d) continuously feeding the soap mass into a mixer/aerator; (e) continuously introducing air into the soap during (d); (f) ) casting the aerated soap into a soap making frame; (g) cooling and cutting the aerated soap cast in (f);
2. The method of claim 1, further comprising stamping and packaging. 4. A continuous method of preparing a low density aerated soap of toilet soap quality, the method comprising: (a) preparing the neat soap of claim 1;
(b) pumping the molten neat soap into a mixer/aerator; (c) pumping in (b) with continuous addition of preservatives, fragrances and other minor ingredients; Step, (
d) processing the soap while continuously introducing air at a pressure of 620 kPa (90 psi); (e) forming the aerated soap into a soap mold, preformed plastic tray or other packaging when melting; (f) sealing and labeling the packaging container.