US 2006/0148934 A1 · Process for the production of resin compositions

Abstract

A manufacturing process for a resin composition is provided, whereby it is possible to homogeneously knead particles and low-temperature decomposable additives into resins. First of all, a thermoplastic resin and an additive are pre-heated and mixed together, after which transition to the kneading step is carried out while the mixture is maintained in a heated state. Then, the mixture is kneaded under heating and molded by extrusion molding or the like to obtain the target resin composition. In the present invention, additives used in particulate form are not liable to cake and can be homogeneously kneaded in because the transition to the kneading step is carried out while the mixture is maintained in a heated state. Moreover, it is possible to knead in low-temperature decomposable additives because the heating temperature used for kneading can be reduced significantly in comparison with the conventional art.

Claims43

Dependent claims

A manufacturing process for a resin composition comprising a kneading step of kneading a thermoplastic resin and an additive under heating, wherein, prior to the kneading step, the manufacturing process further comprises a preliminary step of pre-heating and mixing the thermoplastic resin and the additive, and transition of the mixture obtained in the preliminary step to the kneading step is carried out at a temperature that is the same as a temperature reached at the end of the preliminary step and is lower than a softening temperature of the thermoplastic resin or is carried out at a temperature that is lower than the temperature reached at the end of the preliminary step and is lower than the softening temperature of the thermoplastic resin, and then kneading is carried out.

Dependencies are inferred from the claim text.

Process for the production of resin compositions

Life of this patent

Process for the production of resin compositions

Life of this patent

Abstract

Claims43