Use of a fibre-reinforced plastic material as a reinforcement system of a profile for a window or door frame
AssigneeAluplast GmbH
InventorsManfred Wust, Andreas Heilig, Angelika Homes, Florian Hennenberger, Michael Kay Brockmuller
Life of this patent
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Abstract
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.
Claims7
A method of forming a window or door frame, comprising:
- extruding hollow frame members of a thermoplastic material;
- and
- coextruding reinforcement strips simultaneously into the hollow frame members as the hollow frame members are extruded with upper and lower edges of the reinforcement strips being beaded, and said beads integrated in a clamped fashion in wall parts of the hollow frame members so the reinforcement strips are generally free-standing, the reinforcement strips being formed of fiber-reinforced plastic having an E-modulus >8,000 N/mm2, a softening temperature >100° C., and an elongation coefficient <6·10−5 K−1.
Dependencies are inferred from the claim text.