Polyamide ASA Sheathed Window Profile
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing window and door hollow chamber profiles face challenges in achieving high mechanical stability while maintaining good thermal insulation and weather resistance, particularly with fibre-reinforced polyamide profiles that deteriorate under varying weather conditions.
Innovation Solution
A window or door hollow chamber profile is designed with a core profile made of polyamide material and reinforcing fibres, coated with a sheath profile composed of a blend of polyamide and acrylonitrile-styrene-acrylic ester terpolymer (ASA) to enhance weather resistance, while maintaining mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal reinforcement profile is inserted into the hollow chamber to improve mechanical stability, then the mechanical stability is improved, but the thermal insulation properties deteriorate significantly
Solution Approach 1:
The patent changes the material parameters by using fibre-reinforced polyamide with fiber volume content greater than 20%, transforming the core profile from non-reinforced to continuously fiber-reinforced, thereby achieving high mechanical stability without metal reinforcements and maintaining thermal insulation properties
Solution Approach 2:
The patent employs composite materials by combining polyamide matrix with continuous reinforcing fibers to create a core profile that provides both mechanical stability and thermal insulation, eliminating the need for metal reinforcements that would compromise thermal performance
2Strength
If continuous fibre reinforcement is applied to polyamide window profiles to increase stability, then the mechanical stability is improved, but the weather resistance deteriorates
Solution Approach 1:
The patent divides the profile into two functional segments: a core profile made of fiber-reinforced polyamide for mechanical stability, and a separate sheath profile made of weather-resistant material (PVC or polymer blend) that protects the core from weather exposure, thereby resolving the contradiction between stability and weather resistance
Solution Approach 2:
The sheath profile acts as an intermediary protective layer between the weather environment and the fiber-reinforced core profile, shielding the fibers from direct weather exposure while allowing the core to provide structural stability
3Strength
If the fibre volume content is increased to more than 20% to improve mechanical stability, then the mechanical stability is improved, but the processing difficulty increases
Solution Approach 1:
The patent applies preliminary action by pre-forming the core profile with continuous fiber reinforcement through specialized extrusion or pultrusion processes before assembling the complete profile system, allowing high fiber content to be achieved while maintaining manufacturing feasibility through preparatory material preparation
Data Source
AI summary
The present invention relates to a window or door hollow chamber profile (1), comprising (a) a core profile comprising a plastic matrix formed of a thermoplastic polyamide material and reinforcing fibres contained in the plastic matrix; and (b) a sheath profile (40) at least partially sheathing the core profile (30) and made of a thermoplastic material compatible with the plastic material of the core profile (30), wherein the window or door hollow chamber profile (1) is distinguished in accordance with the invention in that the thermoplastic material of the sheath profile (40) compatible with the plastic material of the core profile (30) is a blend of a polyamide material and an acrylonitrile-styrene-acrylic ester terpolymer (ASA). The present invention additionally relates to a window or door frame which is formed from portions of a window or door hollow chamber profile (1) according to the invention.