Additive manufacturing process using a building material having a high hard segment content

US12195577B2 · kind B2 · utility

Assignee

• Stratasys Ltd. · US

Inventors

• Dirk Achten · Leverkusen, DE
• Thomas Buesgen · Leverkusen, DE
• Mathias Matner · Neuss, DE
• Bettina Mettmann · Dormagen, DE
• Bernd Garska · Cologne, DE
• Michael Richard Kessler · Urbana, US
• Peter Reichert · Thousand Oaks, US
• Roland Wagner · Feldkirchen-Westerham, DE
• Thomas PRENVEILLE · Écardenville-la-Campagne, FR

Key dates

• Filing date: Dec 14, 2020
• Grant date: Jan 14, 2025
• Expiry date: Oct 2, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2995/0012
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for producing an object comprises the step of producing the object by means of an additive manufacturing process from a construction material. The construction material comprises a first polyurethane polymer which has: a weight percentage ratio of O to N of ≥2 to ≤2.5, determined by elementary analysis; a weight percentage ratio of N to C of ≥0.1 to ≤0.25, determined by elementary analysis; a full-width at half maximum of the melting peak of ≤20 K, determined by dynamic differential scanning calorimetry DSC (2nd heating at heating rate 20 k/min); and a difference between the melting temperature and the recrystallisation temperature of ≥5 K and ≤100 K, determined by dynamic differential scanning calorimetry DSC (2nd heating) at a heating and cooling rate of 20 K/min.