| 摘要 |
A bead string includes a thread element and multiple beads firmly attached to the thread element; each bead containing one or a plurality of inner layer and one or a plurality of first outer layer; both of the inner layer and the first outer layer of the bead being molded by respectively injecting two different types of plastic material into a first cavity and a second cavity; one or a plurality of thread element passing through the first cavity; the second cavity accommodating the thread element and the inner layer of bead; and the first outer layer tightly covering up entire portion or a certain portion of the inner layer to correct defectives of a finished product found with the prior art while significantly simplifying manufacturing process and saving time and cost.
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