Abstract: A detergent bar is made by (1) applying pressure to a detergent composition to deliver it to a substantially closed mold at a temperature less than 70° C.; (2) ensuring the pressure on the composition at point of entry is greater than 29.4 psi under the action of an injector head for at least part of the time over which the composition enters the mold; (3) cooling in the mold to form bar; and (4) removing.

Abstract: A deodorant or antiperspirant soft solid composition is filled into dispensing containers by injection moulding, i.e. under pressure, preferably in the vicinity of its normal setting temperature. The deodorant or antiperspirant composition is preferably continuously produced in a screw extruder, especially a twin screw extruder, controlled to deliver the composition in a suitably viscous state under low shear and particularly for formulations in which a particulate antiperspirant is suspended in a fluid carrier. The pressure in the injection head at the point of injection is greater than 120 kPa and in many instances from 800 to 2000 kPa. The combined process offers benefits for controlled fill of dispensing containers, particularly for formulations incorporating sensitive ingredients and offers tolerance in composition temperature at the time of fill.

Abstract: In a first aspect, a process for forming deodorant or antiperspirant sticks by continuously forming a mobile composition for dispensing into containers or molds at a rate matched with the rate at which it is dispensed, and in other aspects a process in which a mobile deodorant or antiperspirant composition is dispensed by injection molding, i.e. a process in which the deodorant or antiperspirant composition is dispensed under pressure. The composition at the time of injection moulding is preferably either in the vicinity of its regular set temperature, particularly in the range of about 0-3° C. below the regular set temperature and/or partially structured at the time of its delivery it into a container or mold.

Abstract: In some aspects a process for forming deodorant or antiperspirant soft solid in which a mobile deodorant or antiperspirant composition is filled into dispensing containers by injection moulding, i.e. a process in which the deodorant or antiperspirant composition is filled under pressure. The composition at the time of injection moulding is preferably in the vicinity of its normal setting temperature. The deodorant or antiperspirant composition is preferably continuously produced in a screw extruder, especially a twin screw extruder, which is controlled to deliver the composition in a suitably viscous state under low shear, at a temperature in the vicinity of its normal setting temperature. Use of the twin screw extruder is particularly advantageous for formulations in which a particulate antiperspirant is suspended in a fluid carrier.

Abstract: A process for forming detergent bars by injection moulding in which a pressure is applied to a partially structured detergent composition to deliver it to a mould. The detergent composition can be delivered to the mould in a substantially semi-solid state, at a temperature below 70° C. and at a pressure at the point of injection of greater than 20 psi. Apparatus for forming detergent bars according the invention are also described.

Abstract: A process for forming detergent bars by injection molding in which a pressure is applied to a partially structured detergent composition to deliver it to a mold. The detergent composition can be delivered to the mold in a substantially semi-solid state, at a temperature below 70° C. and at a pressure at the point of injection of greater than 20 psi. Apparatus for forming detergent bars according the invention are also described.

Abstract: A process for forming detergent bars comprising applying pressure to a detergent composition contained within a mould cavity. The detergent composition in the mould is in a substantially fluid or semi-solid state and the mould is substantially full before the pressure is applied.

Abstract: A process for forming detergent bars by injection moulding in which a pressure is applied to a partially structured detergent composition to deliver it to a mould. The detergent composition can be delivered to the mould in a substantially semi-solid state, at a temperature below 70° C. and at a pressure at the point of injection of greater than 20 psi.

Abstract: A process for forming a molded article having a multilayer structure which comprises successively injecting melts of at least two materials into the cavity portion of a mold, solidifying a part thereof in the cavity portion to form the multilayer structure, characterized in that as a first step, one of the molten materials is injected into the cavity portion and the portion of the injected molten material contacting with the mold surface is solidified to a predetermined thickness to form a skin layer; as the second step, the next molten materials is fed into the cavity, the unsolidified portion of the molten material previously fed is pushed out of the cavity and a part of the thus fed molten material is cooled and solidified from the surface of the mold to form the next layer; and the procedure of the second step is successively repeated using the remainder of the molten materials alternately, and the molded article produced by the above molding process.

Abstract: An injection moulding process for moulding a material in a mould having a mould cavity and at least one channel communicating with the mould cavity, each channel entering the mould at a respective mould inlet includes the steps of heating inner surface areas of the mould to a temperature above the heat distortion temperature of the material; supplying the molten material into the mould by way of at least one channel and subjecting the molten material to a propelling force, sufficient to propel it through the channel into the mould; causing the molten material in the mould to solidify; applying periodic forces to the material in the mould at a plurality of spaced-apart regions, first and second of the regions being located either side of molten material in the mould cavity, the periodic force being applied with a difference in phase so as to cause shear of molten material within the mould cavity between the first and second regions; cooling the mould below the heat distortion temperature of the resin while or