| 摘要 |
<p>Light, composite receptacles comprise an inner envelope of glass having a wall thickness of 0,15-0,70 mm. surrounded on the outside by a contiguous outer envelope of a solid thermoplastic material having a wall thickness at least equal to that of the glass. The thermoplastic material may be polyvinyl chloride, polyvinyl acetate or their copolymers; cellulose esters or mixtures thereof; a polyamide, a poleyster, a polyurethane, a polyether which may be chlorinated, or a polyolefine. Mixtures of polyvinyl acetate and acrylic elastomers or cellulose acetate are preferred. The plastic may be applied by spraying as a powder on the preheated glass surface, or by dipping the preheated glass into a fluidized bed of the powder, or a melt, solution or dispersion of the plastic. The coated glass may be reheated to smooth the coating.</p> |
