Thermal insulation plastic meal box and preparation method thereof

Abstract

The invention relates to the technical field of plastic manufacturing processes, and particularly discloses a thermal insulation plastic meal box and a preparation method thereof. The thermal insulation plastic meal box is prepared from the following raw materials in parts by weight: 90-100 parts of polypropylene resin; 5-10 parts of a heat preservation agent; 10-15 parts of a filling agent; 0.2-0.6 part of an antioxidant; 2-3 parts of an adhesive; the preparation method comprises the following steps: S1, mixing and blending the polypropylene resin, the heat preservation agent and the filling agent according to the ratio, and stirring at the rotating speed of 20-30r / min for 10-20min to obtain a primary mixture; s2, adding an antioxidant and an adhesive into the first-stage mixture according to the proportion, and stirring for 30-60 minutes at the rotating speed of 30-50 r / min to obtain a secondary mixture; S3, adding the secondary mixture into a double-screw extruder for melt extrusion, and calendering the extruded material to obtain the thermal insulation polypropylene sheet; and S4, carrying out plastic suction molding on the polypropylene sheet by using a plastic suction machine to obtain the molded thermal insulation plastic meal box. The composition provided by the invention has the advantage of good thermal insulation effect; in addition, the preparation method has the advantage of being simple in preparation mode.

Description

technical field [0001] The present application relates to the technical field of plastic manufacturing technology, and more specifically, it relates to an insulated plastic lunch box and a preparation method thereof. Background technique [0002] With the development of Internet technology, ordering food delivery has become the preferred way for consumers to eat. Takeaway merchants usually use disposable lunch boxes to hold takeaway food. Disposable lunch boxes on the market involve various materials such as plastic, paper, and metal. [0003] Disposable lunch boxes made of plastic are mostly polypropylene plastic. Polypropylene is a thermoplastic synthetic resin with excellent performance. It is a colorless and translucent thermoplastic light-weight general-purpose plastic. Insulation and other advantages, the physical and chemical properties will not change in the range of -10°C-140°C, it is an ideal material for tableware preparation. However, the thermal conductivity o...

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of the polypropylene plastic lunch box is relatively high. When the polypropylene plastic lunch box contains high-temperature food, the heat in the food is easily dissipated through the lunch box to the outside of the lunch box, causing the food in the lunch box to become cold easily.

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