Study on the Application of Nylon6 Nanocomposites for the In-Mold Decoration Technology

• Main Authors: CHANG CHUN FU, 張鈞富
• Other Authors: Su P. L.
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/09876853663866295977

碩士 === 中州技術學院 === 工程技術研究所 === 96 === This project used PC film of 0.125 and 0.175 mm thicknesses, three kinds of printing ink and NoriPress® SMK solvent-based screen printable adhesion promoter to print with grid mesh film to research the suitiabiltiy of the Nylon 6 nanocomposites in IMD technology. From the first stage experiment results show that the H ink and NoriPress® SMK adhesion promoter were screen printed on the PC film with 0.125mm thickness was the suitable combination for the Nylon 6 nanocomposites. According to the second stage experiment, the following results were found by IMD experiment: The shear stress was lower at higher melt temperature due to that the viscosity of melt decreases with increasing temperature, and therefore a wash-out of printed ink on the film decreased with increasing resin temperature. 1. To increase the mold temperature could decrease the shear stress, but it was not apparent as increasing resin temperature. 2. To adjust the packing pressure in IMD process didn’t affect the wash-out of printed ink on the film. 3. Injection speed increases will cause higher shear rates and shear stresses, and therefore a wash-out of printed ink on the film increased with increasing injection speed. 4. A thiner thickness of film implied a larger thickness of molded part that could help the melt flow in mold cavity. Therefore, a wash-out of printed ink on the film decreased with thiner thickness of PC film. 5. The wash-out of printed ink on the film was much less common in Nylon6 nanocomposites than in pure Nylon6 resin. However, one could improve the wash-out of printed ink on the film by modifyed the gate design and adjsut the injection molding conditions in IMD process for Nylon6 nanocomposites. Finally use Taguchi Methods analysis optimization system regulation parameter.