Development and Validation of a Test Mold for Thermoplastic Resin Transfer Molding of Reactive PA-6

Abstract

Thermoplastic resin transfer molding (T-RTM) is a cutting-edge manufacturing technique for high-volume production of composites with a recyclable thermoplastic matrix. Although a number of reactive thermoplastic matrices as well as industrial manufacturing equipment for T-RTM are commercially available today, the design of a T-RTM mold is still based on the skills and personal experience of the designer. This study summarizes the best knowledge and expertise in mold design and manufacturing and introduces an innovative mold for T-RTM. A concept and basic principles for designing a T-RTM mold are formulated in this study. The mold developed is manufactured and validated.

Influence of Incorporation of Silica and Zirconia Nanoparticles on Some Physical and Mechanical Properties of Thermoplastic Resin Material

“…Thermoplastic resins are lately used as an alternative to the conventional heat-cured PMMA because of the newly introduced injected molded technique which eliminates the need of using powder/liquid system that can cause allergic for patients due to residual free monomers (2,5,21) . Also, they are the non-porous structure, so, no bacterial growth, however, they can retain a little amount of water to keep some comfortable against soft oral tissues (22,23) .…”

“…Also, they are the non-porous structure, so, no bacterial growth, however, they can retain a little amount of water to keep some comfortable against soft oral tissues (22,23) . Furthermore, the polymer chains of thermoplastic resins bond via intermolecular forces (2,4,24) . Flexural strength is an important property of the denture base materials that can reflect the ability of these materials to functionally resist the masticatory forces during clinical services (25) .…”

Influence of incorporation of SiO2 and ZrO2 nanoparticles on some physical and mechanical properties of thermoplastic resin material

“…Also, they are the non-porous structure, so, no bacterial growth, however, they can retain a little amount of water to keep some comfortable against soft oral tissues (22,23) . Furthermore, the polymer chains of thermoplastic resins bond via intermolecular forces (2,4,24) .…”

“…To overcome the disadvantages of conventional heat-polymerized polymethylmethacrylate (PMMA) acrylic resin a wide range variety of alternative denture bases resin materials were lately addressed such as polycarbonate resins, acetal resins, polyamides, and thermoplastic resin material (1,2) . So, the new terminology of "metal-free" removable thermoplastic prosthesis was introduced in dental practice (1,3) .…”

Thermoplastic RTM: Impact Properties of Anionically Polymerised Polyamide 6 Composites for Structural Automotive Parts

“…Murray et al [10][11][12] developed an RTM process that allowed for the manufacture of thermoplastic composites with a polyamide-6 matrix, known as TP-RTM. This work built on research carried out at multiple institutions using similar resin systems with different LCM processing techniques [13][14][15][16][17][18][19][20][21]. The process was shown to have good potential for automotive part manufacture due to the low viscosity of the reactants, quick reaction times, cheap raw materials and a high performing matrix.…”