To provide an injection molding method of a thermoplastic resin which enhances injection moldability, especially mold releasability or flowability without lowering the characteristics of an injection-molded product comprising the thermoplastic resin and enables thin-wall molding or precise molding.
In this manufacturing method of an injection-molded product, a mixture, which contains the thermoplastic resin and polyolefin wax, which is characterized in that the ratio of flow length L in a case containing polyolefin wax to flow length L0 in a case containing no polyolefin wax measured under a condition of the temperature Tr of the resin calculated by the formula: Tr=3/4×Tm+100 [wherein Tm is the melting temperature (°C) of the thermoplastic resin] and a mold temperature of 40°C satisfies the relation: L/L0≥1.05, is injection-molded using a spiral flow mold with a thickness of 1 mm and a width of 10 mm.
KAWABE KUNIAKI
YASUI MOTOYASU
| JP2004051769A | 2004-02-19 | |||
| JPH083381A | 1996-01-09 | |||
| JP2001150474A | 2001-06-05 | |||
| JPH11228782A | 1999-08-24 | |||
| JPH111580A | 1999-01-06 | |||
| JP2005146013A | 2005-06-09 |
Koji Makimura
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