You'll have to look at the original performance requirements and see why 33% GF nylon product was chosen. Glas reinforced crystalline plastcs do tend to warp if designed improperly. It could be a molding or gating problem is to blame.
Check the overall performance of 33% GF nylon vs long strand...
The biggest drawback will be in finding a cost effective flame retardant product. Acetal cannot be made FR. PP can but the cost will be too high. PVC is inherently FR but you will have choose flexible grade. Unfortunately I am not that familiar with PVC. Contact several PVC producer's websites...
Ivo,
Its true that acetals are inherently lubricious compared to most materials, however, there are enough differences in properties such as HDT, TS & TE that they may not be right for your application.
You should consult with a company like LNP that has studied friction and wear. They have...
TOR,
When asking for help it's a good idea to explain what you are designing, what environment and loads it will see, and the manufacturing process your plan to use. These questions must be asked before you'll get meaningful help.
If you plan to use polypropylene in an injected molding...
It is impossible to specify a material based on the limited info provided. More importantly: what conditions /environment/ mechanical stresses will the part see? There is a very limited number of materials that can be injection molded into 1 inch wall thickness sections, let alone a huge part 4...
