| 摘要 |
The use of a fiber-reinforced plastic material as reinforcement strips (2, 6, 7, 14, 15) of a window or door frame hollow profile (1, 10) is provided, with the fiber-reinforced plastic material having an E-module that is >8.000 N/mm2, and preferably >10.000 N/mm2, having a softening temperature of >100° C., and preferably >150° C. and an elongation coefficient of <6·10−5K−1, and preferably <5·10−5K−1 most preferably <4·10−5K−1, in particular fiber-reinforced polybutylenterephtalate, polyetylenterephtalate or a mixture thereof.
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