Abstract: A partially heat denatured yolk prepared by heating a yolk fluid at the temperature from 65.degree. C. to 70.degree. C. and maintaining the said temperature for 5 minutes or more, which can improve the flavour, features and functions of yolk. The said partially heat denatured yolk can be prepared by heating by applying an electric current to the yolk. Further, an emulsion prepared by processing 30-95 weight parts of the partially heat denatured yolk together with 5-70 weight parts of oils and fats to obtain an O/W type emulsion can be used as an emulsifier. The emulsifying ability of said emulsifier can be improved by adding vinegar or acetic acid and/or salt.

Abstract: In charging a fluid molding material in an elastic molding die composed of a die body having an opening and a die support portion extending from the opening to the outside by pouring the molding material from the opening into time die body, the molding material in an amount of 1/5 to 3/5 of a volume of the die body is first charged, a molding material-charged portion of the die body is then crumpled or pinched, and then the entire die body is filled up with the molding material. The crumpling or pinching operation is achieved by such means as a blade shutter, pressing plates, air bags, or passing between two plates or conveyor belts, thereby charging the fluid molding material in the die body of the elastic-molding die without occurrence of air voids.

Abstract: A method of manufacturing hollow molded articles having a beautiful surface at a low cost and by a simple and efficient process includes providing a hollow elastic molding die made of an elastic film and having an opening port, feeding a material to be molded of an amount smaller than the internal volume of the elastic molding die into the elastic molding die through the opening port, closing the opening port, solidifying the material to be molded while the elastic molding die is rotated to all directions, and parting the solidified hollow molded article from the elastic molding die. Arrangement for preventing the elastic molding die from being deformed while it is rotated to all directions includes holding it firm by a solid holding member conforming to the external shape thereof or by positioning it in a fluid or powdery material holding member.

Abstract: A surface coating agent to be coated on the surface of an elastic molding die, which is a solvent solution of a polyurethane obtained by reacting a polyol with an aromatic polyisocyanate. The surface coating agent can be coated on the inside surface of the elastic molding die to form a coating layer, thereby obtaining a molding with surface gloss. Further, the surface coating agent can be incorporated with silicone and/or a fluorine compound to improve oil resistance of the elastic molding die, preventing the elastic molding die from being swollen by oil components of a molding material and improving durability. When a polyether type polyol is used as the polyol, water resistance of the elastic molding die can be even further improved. The surface coating agent using polycarbonatepolyol as the polyol has improved adhesion to the elastic molding die, thereby improving the durability.