| Greenhouses are gothic or Quonset structures with end walls and a double-layer polyethylene inflated roof. |
| Use barriers made of flexible polyethylene 30 to 40 millimeters thick and 22 to 28 inches deep. |
| Among the crystalline polymers are polyethylene, polypropylene, nylon, thermoplastic polyesters, acetal, and polyphenylene sulfide. |
| As the polyethylene oxide drew more water out of the fibroin solution, the micelles aggregated into microscopic globules. |
| At another house the high-density polyethylene pipe warped by heat was attached to the downlet pipe jutting from the terrace. |
| The pumpkin-shaped balloon is composed of a lightweight polyethylene film about the thickness of ordinary plastic food wrap. |
