Processes for producing a shaped body using polyamide blends containing a polyarylether

A process for broadening the sintering window (WSP) of a sinter powder (SP) compared to the sintering window (WAB) of a mixture of components (A) and (B) which comprises incorporating into the sinter powder at least one polyaryl ether in the sinter powder (SP) comprising the following components:

• (A) at least one semicrystalline polyamide comprising at least one unit selected from the group consisting of —NH—(CH2)m—NH— units where m is 4, 5, 6, 7 or 8, —CO—(CH2)n—NH— units where n is 3, 4, 5, 6 or 7, and —CO—(CH2)o—CO— units where o is 2, 3, 4, 5 or 6,
• (B) at least one nylon-6I/6T,
• (C) at least one polyaryl ether,
• where the sintering window (WSP;
• WAB) in each case is the difference between the onset temperature of melting (TMonset) and the onset temperature of crystallization (TConset), wherein
• the polyaryl ether contains units of the general formula (I)
• with the following definitions:
• t, q:
• each independently 0, 1, 2 or 3,
• Q, T, Y:
• each independently a chemical bond or group selected from —O—, —S—, —SO2—, S═O, C═O, —N═N— and —CRaRb— where Ra and Rb are each independently a hydrogen atom or a C1-C12-alkyl, C1-C12-alkoxy or C6-C18-aryl group and where at least one of Q, T and Y is-SO2— and
• Ar, Ar1:
• each independently an arylene group having from 6 to 18 carbon atoms, wherein the sinter powder (SP) comprises in the range from 20% to 90% by weight of component (A), in the range from 5% to 40% by weight of component (B) and in the range from 5% to 40% by weight of component (C), based in each case on the sum total of the percentages by weight of components (A), (B) and (C).