Sushi cold chain is usually divided two stages: sashimi, raw fish, some pre made rolls are stored in a freezer at -18 ℃ to -20 ℃; Finished sushi, bento, some cooked rolls are refrigerated displayed at 0-4 ℃. Ordinary transparent boxes often have problems in these two temperature zones, while BOPS has a more stable low-temperature performance.

brittle at 20 ℃, more reliable for frozen warehouse turnover

In conventional data, BOPS can adapt to the temperature range of -40 ℃ to 85 ℃; The Freezing OPS sheet specifically designed for frozen scenes can maintain flexibility in environments ranging -20 ℃ to -40 ℃, avoiding low-temperature brittleness. For sushi enterprises, this means that sashimi subpackage, Yusheng small boxes, frozen prefabricated sushi can be put the -20 ℃ warehouse first, then transferred to refrigeration distribution. The box will crack leak due to temperature difference handling.

Refrigeration does collapse creep, the stacking of refrigerators does deform

BOPS has high rigidity good surface hardness after bi-directional orientation, with a tensile strength of 50-70MPa. It can maintain stiffness with thinner sheets when used for flip covers deep supports. DFI's BOPS data also mentioned that it is insensitive to changes in relative humidity, with a molding shrinkage of about 0.6%, has dimensional stability even when frozen to the Babbitt temperature range of 85 ℃. When sushi boxes are displayed in multiple layers in the freezer, they are less likely to collapse at the corners loosen the lid due to their own weight upper layer compression.

Maintain transparency even after low-temperature removal, reducing the feeling of "freezing fog"

Ordinary PS is prone to brittleness at low temperatures, some PET is also at risk of becoming brittle in low-temperature environments; BOPS, with its frozen grade formula anti fog coating, can reduce water droplet condensation during refrigerated displays. Shengyao can make ordinary high transparency BOPS anti fog BOPS covers according to the purpose of sushi boxes: the anti fog version is more suitable for 0-4 ℃ refrigerators short distance takeout, while the ordinary high transparency version is more suitable for display in the drying area after frozen storage, avoiding a layer of white fog on the box cover blocking salmon caviar.