Abstract: The disclosure provides an adhesion preventive agent for unvulcanized rubber, the adhesion preventive agent containing smectite and having excellent adhesion prevention, fluidity, dispersion solubility, and dried matter washability. An adhesion preventive agent for unvulcanized rubber of the disclosure contains components (A) to (D): (A) smectite; (B) a compound represented by Chemical Formula (1), (C) a surfactant other than the component (B); and (D) at least one substance selected from the group consisting of an inorganic silicate other than the component (A), an inorganic carbonate, an inorganic sulfate, a metal oxide, a metal hydroxide, red iron oxide, carbon black, graphite, and a metal soap. R?—O—(PO)m-H . . . (1) In Chemical Formula (1), R1 is a linear or branched hydrocarbon group having 4 to 20 carbon atoms, PO is an oxypropylene group, and m represents the average addition molar number of PO, and is a number of 12 to 40.

Abstract: An anti-tack liquid Q1 is produced by an anti-tack liquid production device, using an anti-tack agent G for unvulcanized rubber in the form of a solid having a moisture content that is more than 3% by mass but is 35% by mass or less, wherein the aforementioned device includes: a hopper 11 for storing the anti-tack agent G for unvulcanized rubber; a stirring tank 13 for mixing water and the anti-tack agent G for unvulcanized rubber; and a quantitative feeder 12 for quantitatively supplying a constant amount of the anti-tack agent for unvulcanized rubber from the hopper 11 to the stirring tank 13.