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The invention relates to the technical field of chemical products, in particular to a composite reinforced PP decorative film and a preparation process thereof. The problem that the mechanical property of the PP decorative film is poor is solved. The composite reinforced PP decorative film is prepared by mixing PP, a nucleating agent, short glass fibers, an antioxidant, a light stabilizer, a flexibilizer and a reinforcing agent. The water content, the diameter and the dosage of the short glass fiber and the dosage of the nucleating agent are controlled; controlling the molar ratio of lauryl sodium sulfate to guaiacol, the concentration of the hydrogen peroxide aqueous solution and the stirring time; controlling the type of inorganic salt, the mass ratio of sodium lignin sulfonate to dolomite, the ball-milling rotating speed and the ball-milling particle size; controlling the temperature, stirring time and stirring speed of the mixture I and the mixture II and the vacuum degree of the mixture I; the granulation temperature, the vacuum degree, the calendering time and the calendering film thickness are controlled, and the prepared composite reinforced PP decorative film has excellent mechanical properties.

This application relates to the field of hot molding processing technology, specifically a hot molding pre-assembly fixture and a hot molding pre-forming method. The hot molding pre-assembly fixture includes a central mold and side molds; a first anti-slip portion is provided on the first clamping surface of the central mold to increase the frictional force on the material layer in the web region; a second anti-slip portion is provided on the second clamping surface of the side molds to increase the frictional force on the material layer in the flange region; and the groove depth of the first anti-slip portion is greater than the groove depth of the second anti-slip portion. In this embodiment of the hot molding pre-assembly fixture, the first anti-slip portion can apply an effective dragging force to the material layer in the web region, causing the material layer to follow the mold movement and fully extend. The second anti-slip portion allows for a differentiated matching relationship between the frictional resistance of the side mold to the material layer in the flange region and the frictional driving force of the central mold to the material layer in the web region. This depth difference helps to limit unintended slippage of the material layer in the flange region during the molding process.