| 摘要 |
PROBLEM TO BE SOLVED: To readily contain a molded product that has uniform physical properties and stabilized mechanical strength in a shortened time by soaking its intermediate molded product comprising a thermoplastic resin and hydraulic cement in a mixture of an organic solvent with water. SOLUTION: In this invention, the thermoplastic resin is not particularly limited, any kinds of thermoplastic resins may be employed, for example, polyethylene or polypropylene. The cement is mainly a hydraulic cement as usual portland cement. The organic solvent is one or more kinds of organic solvents that can swell or dissolve thermoplastic resins, in the case that two or more kinds of organic solvent are used as a mixture, their mixing ratio is selected so that the mixture may be well compatible with water. Tetrahydrofuran and the like can be cited as an organic solvent that is compatible with water. Polyvinyl chloride and acetone can be cited as an example of' the combination of the resin with the solvent. The weight ratio of the resin to the cement is 100:(50-900). |
