Abstract: The present disclosure relates to a packaging box and a paperboard structure. The packaging box comprises a first packaging box body, an integral connecting portion, a second packaging box body and a switchable connecting portion which are connected end to end in sequence. The first packaging box body comprises a first accommodating portion formed by a first surface in a thickness direction of the first packaging box recessed inwardly. The second packaging box body comprises a second accommodating portion formed by a second surface in a thickness direction of the second packaging box recessed inwardly. A bendable connection is formed between the first packaging box body and the second packaging box body via the integral connecting portion and the switchable connecting portion, so that the first surface and the second surface are positioned to be opposite to each other.

Abstract: A mask, including a dummy region and at least one effective evaporation region. The at least one effective evaporation region is provided with several first through holes. The dummy region is provided with several second through holes. The second through hole has a same shape as the first through hole, a dimension of the second through hole is equal to a dimension the first through hole, and spacing between the second through holes is equal to spacing between the first through holes. The second through holes are disposed in the dummy region on the outer side of the effective evaporation region. The second through hole has the same shape, dimension, and spacing as the first through hole.

Abstract: The present disclosure discloses a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the novel optical cable has advantages in small diameter, low loss attenuation, good microbending property, excellent mechanical property, long one-time finished length (10 km˜26 km), long storage time, simple preparation process and wide operating temperature range.

Abstract: The present disclosure relates to a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the high-temperature resistant and small-diameter optical cable is small in diameter, low in loss, good in microbending property, excellent in mechanical property, long in one-time finished length (10 kilometers (km)˜26 km), long in storage time, simple in preparation process, and wide in operating temperature range.

Abstract: The present disclosure discloses a high-temperature resistant and small-diameter optical cable and a preparation method thereof. The high-temperature resistant and small-diameter optical cable is prepared by using acrylate as a coating material, using PHB/PET liquid crystal copolyester as an outer protective layer material and using an extrusion process. Compared to traditional optical cables, the novel optical cable has advantages in small diameter, low loss attenuation, good microbending property, excellent mechanical property, long one-time finished length (10 km˜26 km), long storage time, simple preparation process and wide operating temperature range.