FIELD OF THE INVENTION 0001 The invention relates to continuous preparation processes for multiphase soaps in which the individual phases of the soap are readily visible when viewed from above and from the side.

BACKGROUND OF THE INVENTION 0002 DE 100 46 469.6-41 describes multiphase soaps in which the individual phases of the soap are readily visible when viewed from above and from the side, the manual preparation thereof and the application properties thereof. A continuous preparation process for these multiphase soaps is not described. 0003 U.S. Pat. No. 5,198,140 describes the continuous preparation of an interlocked soap with increased strength. The simultaneous extrusion of two soap slugs through an extrusion head results in a soap slug interlocked in the horizontal direction. A subsequent single cut of the soap slug into billets and subsequent stamping produces horizontally divided soap bars. 0004 EP A 0 366 209 describes the preparation of horizontal multiphase soaps by a casting process. Casting processes are only suitable for the preparation of small bar numbers but not for the production of soaps for the mass consumer market. 0005 EP A 0 594 077 describes the preparation of spiral-shaped multiphase soaps which are prepared using a special compression head following radial rotation of the soap slug. Particularly in cases where different soap bases are used, the stability of the type of soap is limited in its application by the many phase boundaries. 0006 DE-A 1 924 980 describes a process for the preparation of a multiphase soap with one or more sheaths which surround a core. 0007 Analogous statements also apply to soaps prepared in accordance with JP 62/48799. Here, a multilayer circular slug is produced. 0008 Also known are soaps in which a vertical cut in the transverse or in the longitudinal direction of the soap which separates the two soap phases (e.g. JP 1/247499). In this type of soap, both phases are visible at the same time. However, the vertical type of soap, upon use by the consumer and during continuing storage, displays the decisive disadvantage of lower stability of the overall soap bar. Because of the small and straight contact surfaces, a vertically cut soap may break apart even as a result of the soap simply falling to the ground. 0009 EP-A 0 545 716 describes the preparation of a multidimensionally curved two-phase soap. By using the casting process, a two-phase soap is produced which is not suitable for the mass consumer market due to the costly preparation. In the case of this type of soap, no pressure is exerted subsequently in the form of a stamping operation. 0010 Furthermore, marbled soaps are also known (DE-A 2 455 982, DE-A 2 431 048 and DE-A 1 953 916). Here, differently colored soap phases are mixed intensively with one another using special pressing cylinders or screw presses, so that a marbled effect arises. Furthermore, the color can also be injected into the soap stream during preparation of the soap. These soaps contain one phase. 0011 A further multicolored single-phase soap is described in U.S. Pat. No. 4,435,310. Here, by injecting color during the preparation of the soap slugs and by manually rotating the extruder head, a multicolored sinusoidal soap is obtained from one billet. 0012 Production of Toilet Soap (D. Osteroth, pp. 76-77, ISBN 3-921956-55-2) describes the cutting of soap slugs using a cutting machine whose blade is attached to a continuous conveyor belt. As a result of the continuous movement of the soap slug, the individual blades are driven into the soap slug and slice it. Here, the cut is perpendicular to the soap slug at an angle of 90. The individual soap sections are then pressed in a press to give soap bars. With this design of the cutting machine, only an angle of 90 for the blades can be set through the positioning of the conveyor belt. Other cutting angles are not possible.

SUMMARY OF THE INVENTION 0013 An object of the present invention is the development of a continuous preparation process for multiphase soaps of the transverse and longitudinal type (FIGS. 1A, 1B and 3A, 3B) in which the individual phases of the soap are readily visible when viewed from above and from the side. Upon use, the multiphase soaps should have a stability comparable with that of a single-phase soap. 0014 The invention, therefore, provides a continuous preparation process for multiphase soaps of the transverse and longitudinal type, containing two or more separately extruded phases, characterized in that the mutual cambering which arises as a result of the stamping of the multiphase soap slugs effects high stability of the finished soaps and the individual separate phases of the resulting multiphase soaps are readily visible when viewed from above and from the side. 0015 In addition, a plurality of embodiments of the process according to the present invention have been developed. 0016 The multiphase soaps from the preparation process according to the present invention exhibit superproportional strength which corresponds almost to the stability of a single-phase soap and which does not break in daily use.

BRIEF DESCRIPTION OF THE DRAWINGS 0017 FIG. 1A shows the top view of multiphase soap of the present invention. 0018 FIG. 1B shows the perspective view of multiphase soap of the present invention. 0019 FIG. 2A shows the top view of the cambering of the two phases of the soap of the present invention. 0020 FIG. 2B shows the perspective view of the cambering of the two phases of the soap of the present invention. 0021 FIG. 3A shows the top view of the longitudinal type of the soap of the present invention. 0022 FIG. 3B shows the perspective view of the longitudinal type of the soap of the present invention. 0023 FIG. 4A shows the top view of the multiphase soap with different cutting angles. 0024 FIG. 4B shows the side view of the multiphase soap with different cutting angles. 0025 FIG. 5 shows a schematic diagram of the process according to process A for the transverse type. 0026 FIG. 6 shows a diagram of the cutting machine with conveyor belts according to FIG. 5. 0027 FIG. 7 shows diagrams of the dies for targeted pinched edge removal and pinched edge separation for the transverse type. 0028 FIG. 8 shows the schematic diagram for the preparation process according to process B for the longitudinal type and the transverse type. 0029 FIG. 9A shows a diagram of the extrusion system for process B. 0030 FIG. 9B shows a diagram of the extrusion system for process C. 0031 FIG. 10 shows a diagram of the die with targeted pinch edge removal and pinched edge separation for the longitudinal type.

DETAILED DESCRIPTION OF THE INVENTION 0032 Preference is given to continuous preparation processes for multiphase soaps in which each phase is visible in the vertical, longitudinal and transverse projection to at least 15% based on the total projected area. 0033 More preference is given to continuous preparation processes for multiphase soaps in which each phase is visible in the vertical, longitudinal and transverse projection to at least 20% based on the total projected area. 0034 In a further embodiment of the preparation process according to the present invention, the phase areas which border one another in the resulting multiphase soaps are cut diagonally and cambered towards one another. The cambering is achieved during the continuous preparation by using pressure. Multiphase soaps with cambered interfaces have particular stability. 0035 In the continuous preparation process according to the present invention for multiphase soaps, preference is given to using phases which have a different composition. 0036 For the purposes of the present invention, soap phases contain soap bases and further additives or ingredients. 0037 The soap bases for the preparation process for multiphase soaps are known per se (Soaps and Detergents, Luis Spitz, ISBN 0-935315-72-1 and Production of Toilet Soap, D. Osteroth, ISBN 3-921956-55-2). For example, soap bases such as alkali metal soaps containing animal and/or vegetable substances, syndets containing synthetic surfactants or combinations of the two can be used for the multiphase soaps. 0038 The soap mass can include, as further ingredients, for example, perfume oils, cosmetic ingredients, dyes and further additives. 0039 Examples of fragrances in the perfume oils for the multiphase soaps according to the present invention are given, for example, in S. Arctander, Perfume and Flavor Materials, Vol. I and II, Montclair, N.J., 1969, published privately or K. Bauer, D. Garbe and H. Surburg, Common Fragrance and Flavor Materials, 3rd Ed., Wiley-VCH, Weinheim 1997. 0040 The perfume oils are generally added to the soap base in an amount of from 0.05 to 5% by weight, preferably from 0.1 to 2.5% by weight, most preferably from 0.2 to 1.5% by weight, based on the soap base. 0041 The perfume oils may be added in liquid form, neat or diluted with a solvent for perfuming the soap base. Suitable solvents for this purpose are, for example, ethanol, isopropanol, diethylene glycol monoethyl ether, glycerol, propylene glycol, 1,2-butylene glycol, dipropylene glycol, diethyl phthalate, triethyl citrate, isopropyl myristate etc. 0042 In addition, the perfume oils for the multiphase soaps according to the present invention can be adsorbed on a carrier which serves both to finely distribute the fragrances within the product and to release them in a controlled manner during use. Such carriers can be porous inorganic materials, such as light sulfate, silica gels, zeolites, gypsums, clays, clay granulates, gas concrete etc. or organic materials such as woods and cellulose-based substances. 0043 The perfume oils for the multiphase soaps in the preparation process according to the present invention can also be in microencapsulated form, spray-dried form, in the form of inclusion complexes or in the form of extrusion products and can be added in this form to the soap base to be perfumed. 0044 The properties of the perfume oils modified in this way may, where appropriate, be further optimized with regard to a more targeted fragrance release by coating with suitable materials, for which purpose preference is given to using wax-like polymers such as, for example, polyvinyl alcohol. 0045 Cosmetic ingredients for the multiphase soaps according to the present invention are known per se (Soaps and Detergents, Luis Spitz, ISBN 0-935315-72-1 and Production of Toilet Soap, D. Osteroth, ISBN 3-921956-55-2). For example, the following cosmetic ingredients may be mentioned: 0046 Cooling active ingredients, such as e.g. menthol and menthol derivatives, warming active ingredients, such as, for example, capsaicin, UV filters, such as, for example, Neo Heliopane (A registered trademark of Haarmann & Reimer GmbH) to protect against discoloration of the soap or to protect against solar irradiation on the skin, vitamins, such as, for example, vitamins A and E for vitalizing the skin, vegetable waxes and oils, such as, for example, cocoa butter, almond oil, avocado oil and jojoba oil, for improving the feel on the skin, plant extracts, moisturizers, minerals, antidandruff active ingredients, such as, for example, Crinipan, active ingredients, such as, for example, deodorizing active ingredients sodium carbonate, triclosan and triclocarban. 0047 The following additives are also known: dyes, such as, for example, titanium dioxide, the addition of stabilizers, such as, for example, DTPA and EDTA, the addition of antioxidants, such as BHT, the addition of filling materials, such as, for example, starch and cellulose, the addition of hardeners, such as, for example, sodium chloride and sodium sulfate. 0048 As a preferred embodiment of the process according to the present invention, we have found a process A1 for the continuous preparation of multiphase soaps of the transverse type (FIGS. 1A, 1B) which is characterized in that, after the milling, homogenization or kneading, two or more simultaneously extruded soap slugs comprising different soap phases are each cut with cuts diagonal to the soap slug at an angle of from 20 to 70, the billets are mutually joined to give one soap slug, the soap slug is cut perpendicularly at an angle of 90, and then the diagonal points of intersection are joined under pressure so that cambering arises at the points of intersection (FIGS. 2A, 2B). 0049 Preferably, in the process A1, the diagonal cut can be made first, then the 90 cut and then the joining of the soaps prior to stamping (process A2). 0050 Also preferably, in the process A1, the 90 cut can also be made first, then the diagonal cut and then the joining of the soaps prior to stamping (process A3). 0051 In addition, we have found a process B for the continuous preparation of multiphase soaps of the transverse type (FIGS. 1A, 1B), which is characterized in that, after the milling, homogenization or kneading of the soap phases, two soap slugs containing different soap phases are coextruded with a contact surface through a mouthpiece (FIGS. 9A, 9B), the contact surfaces being rotated by an angle of from 20 to 70 about the longitudinal axis from the perpendicular, then the two joined soap slugs are cut at an angle of 90, the resulting soap slugs are rotated by 90 about the horizontal and then the contact surfaces of the individual soap phases are joined by stamping under pressure so that cambering arises at the points of intersection (FIGS. 2A, 2B). 0052 In addition, it is preferred if, after the cutting of the soap slug, the subsequent joining under pressure is carried out directly by suitably arranging the die and without rotation of the soap slugs. 0053 In addition, we have found a process C1 for the continuous preparation of multiphase soaps of the longitudinal type (FIGS. 3A, 3B), which is characterized in that, after the milling, homogenization or kneading of the soap phases, two soap slugs containing different soap phases are coextruded with vertical contact surfaces through a mouthpiece, the two joined soap slugs are cut at an angle of 90, the billets are rotated by an angle of from 20 to 70 about the longitudinal axis from the perpendicular and then the contact surfaces of the individual soap phases are joined under pressure so that cambering arises at the points of intersection (FIGS. 4A, 4B). 0054 Alternatively, in process C1, it is also possible, after the milling, homogenization or kneading of the soap phases, to carry out the coextrusion of the two individual soap slugs rotated by an angle of from 20 to 70 about the longitudinal axis from the perpendicular. The soap slug is then cut at an angle of 90 and then the contact surfaces of the individual soap phases are joined under pressure, so that cambering arises at the points of intersection (process C2). 0055 The multiphase soaps prepared by the process according to the invention are described, in terms of their design, in DE 100 46 469.6-41 and can be illustrated by reference to FIGS. 1A, 1B and 3A, 3B by way of example but not in a limiting manner for a rounded standard soap shape with a length of 7.4 cm, a height of 1.8 cm and a width of 5.4 cm: FIGS. 1A, 1B and 3A, 3B show the multiphase soap in perspective view and in top view. The different phases are in each case, designated 1 and 2. FIGS. 2A, 2B and 4A, 4B also represent the cambering of the two phases in top view and side view. 0056 The multiphase soaps of the transverse and longitudinal type can be prepared by the continuous processes A, B and C according to the invention in an effective and favorable manner in large bar numbers and have high stability. 0057 Preparation Processes 0058 The preparation of soap masses is known (Soaps and Detergents, Luis Spitz, ISBN 0-935315-72-1 and Production of Toilet Soap, D. Osteroth, ISBN 3-921956-55-2). 0059 The multiphase soaps are prepared as described in process A by FIG. 5 and in processes B and C by FIG. 8 as an example: first, the soap bases (FIGS. 5 and 8, step 1) are admixed with the above-described additives such as perfume oil, cosmetic ingredients, dyes, stabilizers and further additives, and then milled and/or homogenized using various rollers or kneaders (FIGS. 5 and 8, step 2). 0060 Process A for the transverse type: after the homogenization, the two different soap masses, which can differ by virtue of the composition of the soap mass itself, or by virtue of at least one of the above-mentioned additives, are simultaneously extruded (FIG. 5, step 4). Here, various jacket temperatures can be used depending on the extruder used or the screw press used and the soap masses. 0061 Alternatively, various liquid additives can also be added to the soap mass at a later point in time by metered addition via nozzles (FIG. 5, step 3). 0062 The resulting soap slugs are conveyed in parallel on two or more conveyor belts (FIG. 5, step 5). 0063 Then, in contrast to the customary cutting angle of 90, the simultaneously obtained soap slugs are cut corresponding to the subsequent soap shape and the design type firstly diagonally at an angle of from 20 to 70 (FIG. 5, step 6). The diagonal cut of both soap slugs is performed by two or more separate cutting devices or by a combined cutting device. 0064 The soap slugs are diagonally divided by a blade which moves up and down or forwards and backwards and which is guided diagonally perpendicularly or diagonally horizontally relative to the soap slug. 0065 The diagonal cut of the soap slug is preferably carried out using a continuous conveyor belt on which diagonally attached blades are located (FIG. 6). The conveyor belts travel on two oppositely positioned cones which ensure even and trouble-free rotation of the blades. The angles of the two cones are determined here by the angling of the blades relative to the soap slug. As a result of the cutting, soap billets in the shape of a parallelogram are obtained. 0066 To cut the soap slug, the conveyor belts are passed over appropriately positioned deflection rollers. In this connection, the precise cut of the blades is ensured by the reliable conveyance on the conveyor belt and on the rotating cones. 0067 The cutting angle of the blades relative to the soap slug can be changed in a flexible manner via the positioning of the blades on the conveyor belt and via the angle of the rotating cones. This special technical feature permits the clean cutting of soap billets into large bar numbers. 0068 Propulsion of the blades can either be carried out by the propulsion of the soap slug or by a direct drive. In the case of a direct drive, the speed of the blades is synchronized with the propulsion of the soap slug. 0069 In a preferred embodiment, the soap slug is cut by blades located on a roller. This ensures a clean cut as a result of the size and the position relative to the soap slug. 0070 It is preferred if the soap slug is cut by blades attached to a rotating disc (FIG. 5, step 6). The disc is arranged obliquely relative to the direction of transportation of the soap slug in order to obtain the oblique cut. The speed of rotation is synchronized with the speed of the conveyor belt in order to obtain billets of the desired length. 0071 In addition, it is preferred if the soap slug is divided by targeted diagonal stamping, by cutting with a wire or by other methods. In this connection, reliable cutting is ensured by the suitable positioning of the soap slug e.g. by concave trays. 0072 In all of the processes A used, the soap slug is divided diagonally relative to the axis of the soap slug at an angle of from 20 to 70, preferably 25 to 60 and most preferably 30 to 50. 0073 The alternating bringing together of the billets of the two individual soap slugs is preferably carried out using material-stream combiners (FIG. 5, section 7), in which the diagonal cut surfaces of the individual sections are guided precisely to one another and optionally slightly pressed. 0074 Preference is given to the bringing together of the billets by displacement e.g. using vacuum suction bells. Here, either individual or simultaneously two or more billets are lifted up from the first two conveyor belts and placed onto a third conveyor belt. This conveyor belt, which is synchronized with the first two conveyor belts, travels at approximately twice the speed. The third conveyor belt can be flat or slightly cambered and preferably has indentations or edges within which the billets are held. 0075 It is also preferable to bring together the individual billets using material-stream diverters, e.g. metal paddles, which are at a plane angle relative to the conveyor belt and divert the billets onto another conveyor belt. In this connection, the new conveyor belt must travel at at least twice the speed as the first two conveyor belts. As a result of the doubled speed of the third conveyor belt, a gap between the billets of the first conveyor belt is created, into which the billets of the second conveyor belt are then inserted. The third conveyor belt can be flat or slightly cambered and preferably has indentations or edges within which the billets are held. 0076 To improve the adhesion of the individual billets, the cut surfaces can also be wetted with a fixative such as, for example, an adhesive or with warm or liquid soap mass. After the joining together and the setting or cooling, the join becomes strong. The setting or cooling can be influenced by suitable temperature control. 0077 If an adhesive is used, it must be ensured that no residues arise as the soap is worn away by, for example, using water-soluble adhesives. 0078 Then, the newly combined soap slug is cut a second time at the customary angle of 90 corresponding to the length of the subsequent soap bar (FIG. 5, step 8), the cut preferably being in the middle of the cuts already present. Alternatively, the cut can be offset from the centre. At the end of this process, this will give a soap bar with differently sized individual soap phases. 0079 It is also preferred if the individual soap slugs are first cut, diagonally, at an angle of from 20 to 70, then cut again at an angle of 90 and then combined to give one soap slug or to give the desired cylindrical soap slugs. 0080 It is also preferred, if the individual soap slugs are cut, first at an angle of 90, then again diagonally at an angle of from 20 to 70 and are then combined to give one soap slug or to give the desired cylindrical soap slugs. 0081 The newly formed cylindrical soap slugs, which contain different soap phases, are then pressed into the final shape by horizontal or vertical stamping or pressing (FIG. 5, step 9). Alternatively, the cylindrical soap billet can be rotated and then stamped. Prior to stamping, the precise positioning of the two billets and of the overall soap slug in the die is important. This can be ensured, for example, by the suitable choice of guides and holders, which press the sections together, both before and also during the stamping operation. 0082 The stamping of the cut and combined soap slugs to give the soap bars is usually carried out individually in rotating disc presses or in greater numbers in so-called flashstamping systems (Soaps and Detergents, Luis Spitz, pp. 193-204, ISBN 0-935315-72-1). 0083 The stamping operation is carried out with a varying pressing weight or pressing force, depending on the type of soap stamping machine used. Various temperatures are used during the stamping operation, corresponding to the nature and the composition of the soap mass. 0084 The overhangs and pinched edges which arise during stamping are separated from the soap bar using blades or guides (FIG. 7) during the actual stamping operation. Here, by virtue of the suitable arrangement of the blades, both the two pure soap masses and also a mixed phase is separated off. The two pure soap phases are then returned to the preparation process. For the die according to FIG. 7, a mixed phase of about 1%, based on the total soap mass used in the first substep, arises. 0085 This mixed phase can either be processed to give a separate soap or, in the case of a two-colored soap, be colored and likewise reused. 0086 Alternatively, two or more diagonal soap sections obtained from the first diagonal cut can also be pressed individually in a horizontal press following the mutual joining. As a result, stamping takes place continuously from the soap slug. The protruding cut edge of the two diagonally cut bars is then likewise separated and can be returned to the process. 0087 Finally, the resulting soap bars are cooled to normal temperature in cooling systems. 0088 Process B for the transverse type: after the homogenization, the two different soap masses, which can differ by virtue of the composition of the soap mass itself or else by virtue of at least one of the abovementioned additives, are extruded by coextrusion (FIG. 8, step 4) to give a soap slug. 0089 Alternatively, various liquid additives can also be added to the soap mass by metered addition via nozzles at a later point in time (FIG. 8, step 3). 0090 First, the two soap masses are preshaped in individual, e.g. semicircular, extrusion pipes to give partial soap slugs, brought together in a common e.g. circular, extrusion pipe and then extruded through a mouthpiece (FIGS. 9A, 9B). This produces a longitudinally divided soap slug in which the soap phases have already been joined together as a result of the coextrusion. 0091 By rotating the semicircular extrusion pipes of the partial soap slugs or by rotating the separating wall between the partial soap slugs from the perpendicular by an angle between 20 to 70 with respect to the longitudinal axis, a soap slug rotated from the perpendicular with respect to the two soap phases is obtained (FIGS. 9A, 9B). 0092 It is preferable if the separating wall between the two individual extrusion pipes is a straight wall. It is also preferred if the separating wall has a wave shape matched to the subsequent soap shape, or an irregular shape. It is also preferred if the separating wall is in itself rotated and a rotation of the soap slugs from the perpendicular is achieved as a result. 0093 It is preferred, if the individual extrusion pipes are semicircular, and the coextrusion pipe and the mouthpiece are circular in their geometric shape. Alternatively, the individual extrusion pipes may be semi-oval and the coextrusion pipe and the mouthpiece may be oval. It is further preferred if the individual extrusion pipes are square or rectangular and the coextrusion pipe and the mouthpiece are rectangular or square. Further combinations of circular, semicircular and angular extrusion pipes are possible. 0094 The width and height of the mouthpiece is determined by the design of the finished soap bar. In a particular embodiment, the width of the mouthpiece corresponds to the length of the finished soap bar. Depending on the design of the finished soaps, the width of the mouthpiece is larger or smaller than the length of the die. In general, the volume of the soap slug must be greater than the volume of the die. 0095 During the extrusion, various jacket temperatures can be used, depending on the extruder used or the screw press used and the soap masses. The extruded soap slug then contains two partial slugs which are joined to one another at a diagonal contact surface. 0096 The soap slug is then cut using methods known per se at an angle of 90 corresponding to the size and shape of the finished soap bar. The length of the section is determined by the design of the finished soap bar. In a preferred embodiment, the length of the section corresponds to the width of the finished soap bar. 0097 Thereafter, the soap slugs are rotated by 90 about the horizontal and converted into the final shape by stamping or pressing. The stamping of the soap slugs to give the soap bars is usually carried out individually in rotating disc presses or in greater numbers in so-called flashstamping systems (Soaps and Detergents, Luis Spitz, pp. 193-204, ISBN 0-935315-72-1). 0098 The stamping operation is carried out with a varying pressing weight or pressing force depending on the type of soap stamping machine used. Various temperatures are used during the stamping operation, corresponding to the nature and the composition of the soap mass. 0099 Preferably, the stamping or pressing of the soap bar can also take place without prior rotation of the soap slug. In this case, the die in the press is then conveyed at a right angle relative to the soap billet. 0100 The overhangs and pinched edges which arise during stamping are separated from the soap bar using blades or guides (FIG. 7) during the actual stamping operation. Here, by virtue of a suitable arrangement of the blades, both the two pure soap masses and also a mixed phase is separated off. The two pure soap phases are then returned to the preparation process. For the die according to FIG. 7, a mixed phase of about 1%, based on the total soap mass used in the first substep, arises. 0101 This mixed phase can either be processed to give a separate soap or can, in the case of a two-colored soap, be colored and likewise reused. 0102 Finally, the resulting soap bars are cooled to normal temperature in cooling systems. 0103 Process C for the longitudinal type: after the homogenization, the two different soap masses, which can differ by virtue of the composition of the soap mass itself or else by virtue of at least one of the abovementioned additives, are extruded by coextrusion (FIG. 8, step 4) to give a soap slug. 0104 Alternatively, various liquid additives can also be added to the soap mass by metered addition via nozzles at a later point in time (FIG. 8, step 3). 0105 For this, the two soap masses are first preshaped in individual e.g. vertically semicircular, extrusion pipes to give partial soap slugs, brought together in a common e.g. circular, extrusion pipe and then extruded through a mouthpiece (FIGS. 9A, 9B). This produces a vertically longitudinally divided soap slug in which the soap phases have already been joined together by the coextrusion. 0106 Alternatively, by rotating the semicircular extrusion pipes for the partial soap slugs or by rotating the separating wall between the partial soap slugs from the perpendicular by an angle between 20 to 70 with respect to the longitudinal axis, a soap slug rotated from the perpendicular with respect to the two soap phases is obtained. 0107 It is preferable if the separating wall between the two individual extrusion pipes is a straight wall. It is also preferred if the separating wall has a wave shape matched to the subsequent soap shape, or has an irregular shape. 0108 It is preferred if the individual extrusion pipes are semicircular and the coextrusion pipe and the mouthpiece (FIGS. 9A, 9B) are circular in their geometric shape. Alternatively, the individual extrusion pipes may be semi-oval and the coextrusion pipe and the mouthpiece may be oval. It is also preferred if the individual extrusion pipes are square or rectangular and the coextrusion pipe and the mouthpiece are rectangular or square. Further combinations of circular, semicircular and angular extrusion pipes are possible. 0109 Various jacket temperatures can be used during the extrusion depending on the extruder used or the screw press used and the soap masses. 0110 In the case of a vertically divided soap slug, the soap slug is firstly cut at an angle of 90 to give the individual soap slugs and then, before or during the stamping of the soap bar, rotated by an angle of from 20 to 70 with respect to the longitudinal axis of the soap slug. 0111 The stamping of the cut and combined soap slugs to give the soap bars is usually carried out individually in rotating disc presses or else in greater numbers in so-called flashstamping systems (Soaps and Detergents, Luis Spitz, pp. 193-204, ISBN 0-935315-72-1). 0112 The stamping operation is carried out with a varying pressing weight or pressing force depending on the type of soap stamping machine used. Various temperatures are used during the stamping operation, corresponding to the nature and composition of the soap mass. 0113 The overhangs or pinched edges which arise during stamping are separated from the soap bar using blades or guides (FIG. 10) during the actual stamping operation. Here, by virtue of a suitable arrangement of the blades, both the two pure soap masses and also a mixed phase is separated off. The two pure soap phases are then returned to the preparation process. For the die according to FIG. 10, a mixed phase of about 1.5%, based on the total soap mass used in the first substep, arises, depending on the angle used. 0114 This mixed phase can, for example, either be processed to give a separate soap or, in the case of the two-colored soap, can, for example, be colored and likewise reused. 0115 Finally, the resulting soap bars are cooled to normal temperature in cooling systems. 0116 Formulations of Various Types of Soap: 0117 For the preparation of multiphase soaps according to the preparation process of the invention, it is possible to use, as soap bases, e.g. alkali soaps, syndets or combinations of the two. 0118 For all of the combinations of the basic soap masses, the water content of the individual soap formulations must be taken into consideration. The varying shrinkage of the individual soap formulations may lead to separation at the contact surface and thus to breakage of the soap. In addition, different soap formulations can have differing wearing-away behavior. By suitably setting the water content, the soap raw materials and further additives in the individual soap formulations and by using the preparation process according to the present invention, it is possible to use numerous combinations of soap formulations for the preparation of stable multiphase soaps. 0119 Since these so-called solid skin cleansing agents can also be prepared in transparent or opaque form on the basis of different additives and a particular preparation process, the most diverse combinations, including of course colored ones, can be prepared. 0120 Reference Numeral List: 0121

FIGS. 1A and 1B

0122 Two-phase soap of the transverse type 0123 Ref. No. 1-phase 1 0124 Ref. No. 2-phase 2 0125

FIGS. 2A and 2B

0126 Multiphase soap with different cutting angles 0127 (transverse type, middle section, side and top view) 0128

FIGS. 3A and 3B

0129 Two-phase soap of the longitudinal type 0130 Ref. No. 1-phase 1 0131 Ref. No. 2-phase 2 0132

FIGS. 4A and 4B

0133 Multiphase soap with different cutting angles 0134 (longitudinal type, middle section, side and top view) 0135

FIG. 5

0136 Schematic preparation process according to process A for the transverse type 0137

FIG. 6

0138 Cutting machine with conveyor belts 0139

FIG. 7

0140 Dies for targeted pinched edge removal and pinched edge separation for the transverse type 0141

FIG. 8

0142 Schematic preparation process according to process B for the longitudinal type and the transverse type 0143

FIGS. 9A and 9N

0144 Extrusion system for processes B and C 0145

FIG. 10

0146 Dies with targeted pinched edge removal and pinched edge separation for the longitudinal type 0147 Although the invention has been described in detail in the foregoing for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.