Mode photonic crystal fiber comprises a core of a substantially transparent material having a core. Said core material having a core refractive index and length, and having a core diameter. Surrounding said optical fiber further comprises a core material at the outer cladding region. The cladding re.....
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The present invention relates to a two-way shape memory effect of a polymer composite material and its preparation, characterized in that the polymer composite material having shape memory polymeric material and active response to sticky and elastic material made of superposition; Polymer composite .....
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一种防护口罩，该口罩由内至外包括如下功能结构层：水分单向传输层，保证该液体只能从内表面传送出去以保持皮肤干燥和舒适，防止被感染的液体传到皮肤、口、鼻；网状结构层，实现过滤功能；防水透气层，具有保护壳的功能以防止被带有细菌和／或病毒的飞沫吸收和穿透。该三层中所用的纤维最好都用多功能的抗菌剂处理过。所以本实用新型的口罩和不但穿戴舒适而且不论细菌／病毒是由外向内，还是由内向外地传播，都会被所接触到的各层纤维／织物杀死／抑制。因此可以有效地取代现有的各种保护口罩。
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