| 摘要 |
Both tips of a plastic straw are thermally treated to smooth the sharp edges of the fresh cut tip ends. The straw of this invention protects human from being hurt by the sharp tip edges of a conventional beverage straw. After the cutting step in extrusion process of polyolefin tubes, both tip ends of the tubes from the cutter are contacted with hot and smooth surfaces of, including but not limited to, a metal and a ceramic tile surface at a temperature of at least 50° C. for shorter than 1 minute rendering smoothed tip-ends.
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