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Home xin The plastic bag packaging box of frozen food sold in the supermarket is usually white, and some geometric patterns are pressed at the bottom of the box______

The plastic bag packaging box of frozen food sold in the supermarket is usually white, and some geometric patterns are pressed at the bottom of the box______

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The plastic bag packaging box of frozen food sold in the supermarket is usually white, and some geometric patterns are pressed at the bottom of the box. It is mainly for __

the color of opaque objects is determined by the light it reflects. White objects can reflect all kinds of colored light and have strong reflection effect on light. At the same time, the heat absorption capacity of white objects is weak. Therefore, the plastic bags and boxes for frozen food sold in supermarkets usually use white.
the plastic used for making packaging boxes has little mechanical strength. In order to prevent the packaging boxes from cracking and damaging, Some geometric patterns are often pressed at the bottom of the box to increase the mechanical strength of the packaging box.
answer: white objects have strong reflection of external heat radiation and less heat absorption, which is conducive to the heat preservation of food; Pressing some concave convex grooves with geometric patterns is conducive to strengthening the mechanical strength of the box bottom and enhancing the deformation resistance of the box bottom.

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