JPH0365400B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a floating soap bar with low swelling and melting properties, and a method for manufacturing the same. Floating soaps manufactured by conventionally known methods have the disadvantage of high swelling and melting properties during use.
Therefore, there has been a strong demand from consumers and the industry for a solution to these difficulties. As a result of continuous research, the inventor found that the moisture content was 14%.
Add air or a suitable gas to molten soap containing 24% to 24%, stir while cooling,
Bring it to a semi-molten state at a temperature of 51°C to 65°C and heat it to 72°C.
The present invention was based on the knowledge that when extruded by heating to 80°C, it is possible to obtain an improved floating soap that has less swelling and melting properties than floating soaps or cosmetic soaps produced by known methods. completed. In the conventional method for producing floating soap, solid soap is produced directly from concentrated liquid soap having a water content of about 20%. An example of this is as follows. A liquid soap, a gas such as air, a fragrance, a color, or other mixed composition are placed in a converter that is cooled by cooling water inside the jacket. When this mixture is stirred and mixed, air bubbles are generated,
It is continuously transferred to another container through a discharge valve and allowed to solidify into a suitable form. The following examples are examples of methods for extruding fluid soap into appropriate soap lumps. It has less moisture and more bubbles than regular soap.
In the process of manufacturing bar-shaped floating soap with a large beta phase soap content, a fluid soap gas containing at least 15% sodium saturated fatty acid having 16 to 22 carbon atoms is mixed and stirred to form a paste. This is a known method for producing floating soap by stirring the soap while cooling the temperature from 71°C to 51.7°C to convert most of the soap into the beta phase. Another example of a known method for producing floating soap is given below. Sodium soap containing 30% water is produced by soaping a mixed oil consisting of 20% castor oil and 80% beef tallow, and heated to 200°C while supplying high pressure steam of 17.58 kg/cm ² or more. The water is then sent to a flushing chamber through a spray nozzle and evaporated to a water content of approximately 20%, at a temperature of 106°C. The fluid soap thus produced is cooled to 60°C in a cooling device. At this temperature, soap becomes sticky as a paste. Air is then pumped into the soap to produce floating soap so that when it reaches the cutting machine, the specific gravity is 0.80. The floating soap produced by the conventional known method described above has the disadvantage of high swelling and melting properties during use. The present invention relates to a floating soap bar with low swelling and melting properties and a method for manufacturing the same. According to the present invention, soap in a molten state with a water content of 14% to 24% is stirred while cooling by adding air or an appropriate gas to create a semi-molten state at a temperature of 51°C to 65°C. By heating the soap to 72°C to 80°C and extruding it, floating soap with low swelling and melting properties can be produced. An object of the present invention is to provide a floating soap with low swelling and melting properties. The soap produced by the method of the present invention eliminates some of the drawbacks of soaps produced by conventional known methods. Another object of the present invention is to provide a method for producing floating soap with low swelling and melting properties. The method of the present invention solves the conventional drawbacks by continuously stirring a molten soap having a moisture content of 14% to 24% under heat insulation to maintain the temperature at 51°C to 65°C. The present invention relates to a floating soap with low swelling and melting properties. Molten soap with a moisture content of 14% to 24% is stirred while cooling by adding air or a suitable gas to a semi-molten state at a temperature of 51°C to 65°C, and then heated to a temperature of 72°C to 80°C. By heating and extruding, it is possible to produce floating soap with low swelling and melting properties. After cooling, a portion of the mechanical energy is converted into thermal energy, and a part of the mechanical energy is converted into thermal energy, resulting in a semi-molten soap. The temperature of the soap block was changed from 51℃ to
Raised to 65 °C, sheared, mixed, and mixed by mechanical stirring.
A homogenizing and dispersing action takes place. After sufficient mechanical stirring, the temperature when extruding the soap mass is
It is not until the temperature reaches 72°C to 80°C that the crystals transform into a homogenized soap with less swelling and melting properties. In contrast, in the conventional method, the resulting soap had high swelling and melting properties by forming the soap into a rod shape by stirring while cooling it from 71°C to 51.7°C. In this way, soap that has been cooled to a semi-molten state, stirred, and then pressed has a high content of beta phase soap. Unlike the method of the present invention, which cools and stirs the soap once and then presses it out as is, the method of the present invention uses mechanical stirring to shear, mix, and homogenize the semi-molten soap mass under continuous heat insulation. At the same time, part of the mechanical energy is converted into thermal energy to raise the temperature of the semi-molten soap mass from 51°C to 65°C, and the temperature of the soap is from 72°C to 80°C. The soap crystals are transformed and extruded to produce improved floating soap. In addition, if the soap bar is simply cooled and stirred and extruded at a temperature of 72°C to 80°C, the resulting soap bar will have a poor ability to maintain its shape, causing problems in the continuous extrusion process of the soap bar. However, when the soap undergoes a crystal conversion process at an extrusion temperature of 72°C to 80°C using the method of the present invention, its shape is highly maintained, and therefore, the continuous extrusion process of the soap bar has low swelling and melting properties. action is possible. The manufacturing process of the present invention will be explained in detail as follows. Moisture content29 manufactured by conventional methods
% to 33% of a fatty acid alkali metal salt, generally a fatty acid sodium salt or a mixture of a fatty acid potassium salt and a fatty acid sodium salt, is heated to 150°C to 180°C and flash-dried at a temperature of about 103°C to 106°C to remove moisture. Produces liquid soap with a content of approximately 14% to 24%. When a floating soap is desired, it is enriched with air or other gas that can be mixed with the soap to give a specific gravity of 0.85 to 0.98. Then add antioxidants, sequestrants, titanium oxide, fragrances or other additives if necessary. The above-mentioned liquid soap is stirred in the cooling process to become a semi-molten soap at a temperature of 51°C to 65°C, and the semi-molten soap is squeezed out to convert its crystals. The important thing here is that the temperature during extrusion is between 72℃ and 80℃.
It is necessary to control the cooling temperature, water amount, stirring speed, and soap supply speed in the cooling process so that the amount of soap is maintained. If the temperature of the soap is less than 51℃ during the mechanical stirring process, the swelling and melting properties of the final product will be high, and if the temperature exceeds 65℃, the final product will lack stickiness and flowability. Cracks begin to appear on the surface. Therefore, the temperature during extrusion is 72℃~
Particular attention must be paid to this temperature, as swelling and melting properties decrease only at 80°C. In conclusion, in order to reduce the swelling and melting properties of floating soap, it is not the water content of the soap that is important, but the temperature of the liquid soap at 51℃ during mechanical stirring.
The temperature of the soap during extrusion increases to 72℃ to 65℃.
This means that the temperature must be controlled at 80℃. An example of an apparatus for carrying out the method of the present invention will be described in detail with reference to the accompanying drawings. A heat exchanger consisting of an inner cylinder 5, an outer cylinder 6, and a rotor 12, in which molten soap with a water content of 14% to 24% to which air or other gases and fragrances, pigments, antioxidants, etc. have been added is introduced into an inlet. Cool it down.
The inner cylinder 5 is equipped with a rotating rotor 12 driven by a rotating extension shaft 11;
A blade 13 is attached to the blade 13 with a set pin 14. When the rotor 12 rotates in a predetermined direction, the knife edge 15 of the blade 13 moves into the inner cylinder 5 due to the centrifugal force and the resistance of the soap.
The thin, hard film of soap adhering to the inner wall surface of the soap is scraped off, and the scraped fixed layer is mixed, stirred, and homogenized by the rotation of the blade 13. While passing through the heat exchanger 1, the concentrated soap is sent to the soap crystal converter 3 through the connecting pipe 2, which is cooled to 65°C to 51°C. Holes are formed so that powerful mixing, stirring, and homogenizing effects can be effectively performed by the rotation of the blade 13. The outside of the external cylinder 6 is wrapped with a heat insulating material 17. The connecting pipe 2 is enclosed in an outer cylinder 18 for heat retention, and a thermometer 19 is attached. The soap crystal converter 3 has an inlet 21 at its upper part, a cylinder 22 with several fixing pins 23 in a row or more in a comb pattern attached to the inner wall surface, and several kneader pins 25 attached to the rotating shaft 24. ing. When the fixing pin 23 and the kneader pin 25 rotate, they cross each other and rotate. There is a bearing 28 on the exit side of the cylinder 22 that supports one end 27 of the rotating shaft 24.
The bearing 28 is supported by a support member 29 fixed to the inner wall surface of the cylinder 22, and the pressure outlet is connected to the pressure-pressing portion 32.
is connected to. The cylinder 22 is wrapped in a heat-retaining cylinder 33 to keep it warm. The extrusion section 32 is surrounded by a hot water cylinder 34 through which hot water circulates to facilitate extrusion. The temperature of the soap extruded through the extrusion port 20 at the tip of the extrusion section 32 after the above cooling process and soap crystal conversion process is 72°C to 80°C. The floating soap bar obtained in this way is cut and molded to determine its specific gravity.
They make floating soap products with a weight of 0.85 to 0.98. Furthermore, examples of the method of the present invention will be described in detail. However, the scope of the present invention is not limited only to the following examples. Examples 1 to 9 Sodium soap having a moisture content of 31% is prepared by a conventional method using a mixture of 70% beef tallow fatty acid and 30% sludge fatty acid and heated to 160°C to 175°C. This is sprayed with a nozzle into atmospheric pressure to reduce the moisture content to 15.8%.
Produces 23.7% molten soap. Air is added to the molten soap so that the specific gravity of the final product is about 0.93, 0.1% fragrance and 0.03% EQTA-4Na salt are added to the molten soap, and the mixture is sent to the cooling process using a pump and the rotor is heated to about 0.93%.
49℃ to 60℃ by rotating at a speed of 200r.pm and supplying cooling water of 9℃ to 18℃ at a rate of 300 to 500 degrees per minute.
Cool to The cooled semi-molten soap is then sent to a soap crystal conversion process through a connecting pipe.
The rotating shafts are rotated at rotational speeds of 200 r.pm, 300 r.pm, and 420 r.pm to stir the semi-molten soap. Table 1 shows the results of testing the soap bars extruded from the extrusion port at the tip of the extrusion section.

【table】

[Table] The test results shown in Table 1 show that during the soap crystal conversion process, the soap in a semi-molten state gains thermal energy through mechanical stirring and its temperature rises from 51°C to 65°C. The results show that floating soap with low swelling and melting properties was obtained by controlling the temperature at 72°C to 80°C. The swelling and melting properties of soap were measured by the following method. A soap molded to a height of 30 mm, a width of 55 mm, and a length of 95 mm.
After immersing it vertically in water at 12°C to a depth of 40 mm for 4 hours, the weight increase due to swelling was measured and the degree of swelling was compared. After immersing it in water for an additional 20 hours, for a total of 24 hours, the soap was removed from the water, and the soft, moist areas were wiped with soft gauze, and the weight was measured over time at room temperature. The degree of melting was expressed as the difference between the weight at the time when the weight seemed to reach an equilibrium state and the initial weight before immersion in water. Therefore, the larger the value, the higher the swelling and melting properties.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-section of an apparatus for carrying out the method of the invention, and FIG. 2 is a cross-section of the apparatus taken along the 4--4 direction in FIG. 1... Heat exchanger, 3... Soap crystal converter, 5
...Inner cylinder, 12...Rotating rotor, 13...
Blade, 22...Cylinder, 23...Fixing pin, 2
4... Rotating shaft, 25... Kneader pin.

Claims (1)

[Claims] 1 A molten fatty acid sodium salt or a mixture of fatty acid sodium salt and fatty acid potassium salt with a moisture content of 14% to 24% is stirred while cooling by adding air or a gas that is miscible with soap, and heated to 51°C. The soap is semi-molten at temperatures ranging from 65℃ to 65℃, and the resulting semi-molten soap is heated to 200r.
A method for producing a floating soap bar, characterized by heating and extruding at 72°C to 80°C while mechanically stirring at a speed of pm to 420 r.pm.