Moulded piece with higher durability for short-time loaded thermal deformation

Abstract

Molded parts made of molding compounds containing A) 35-100% by weight of thermoplastic polyester, B) 0-60% by weight of fillers or reinforcements, C) 0-20% by weight of impact Modified raw rubber, D) 0-30% by weight flame retardant, E) 0-20% by weight synergist and F) 0-5% by weight of other additives and / or processing aids, and heated at 180°C to 250°C Place the molding compound at ℃ for at least 1 hour to improve its resistance to thermal deformation under short-term load.

Description

technical field [0001] The subject of the invention is a method for the production of molded parts having a higher resistance to thermal deformation under short-term load and the molded parts produced by this method. Background technique [0002] In the electrical industry or electronics industry, certain molded parts have high shape and dimensional stability requirements under short-term high heat loads, especially under the heat loads generated by various welding methods such as reflow welding or wave welding has been improved. In this case, a temperature peak of 260 to 450° C. partially occurs in a time window of at most 30 seconds. This mainly applies to SMD devices (Surface Mounted Devices) and MIDs (Molded Connectors, ie three-dimensional circuit carriers). Glass-fibre-reinforced self-extinguishing molding compounds based on polyesters such as polybutylene terephthalate, which are mainly used for this purpose in the electrical or electronics industry, meet these requ...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the irradiation method are obvious: expensive equipment and generally some additional logistical work, since irradiation is usually carried out outside the company and is therefore costly and time-consuming