| 摘要 |
A method for treating a relatively unstretched portion of a blow molded container, the method including, after initial blow molding, heating the unstretched portion to cause crystallization of the material located at the unstretched portion. In one embodiment, heating the unstretched portion may involve heating the unstretched portion with infrared wavelengths, directly contacting the unstretched portion with a heating element, or heating the unstretched portion with a heating element positioned near, but not in contact with, the unstretched portion. In still another embodiment, heating the unstretched portion may involve indirectly heating the unstretched portion. Indirectly heating the unstretched portion may include conductively heating the unstretched portion using an intermediate material positioned generally adjacent to the unstretched portion, the intermediate material absorbing heat energy from a light source emitting radiation toward the intermediate material and transferring at least some of the heat energy to the unstretched portion. |
