Abstract: A material of thermoplastic fusible inner mold is provided, including: a high crystalline polymeric material and a lubricant material, the high crystalline polymeric material mixed with the lubricant material. An inner mold is further provided, made of the material of thermoplastic fusible inner mold described above. A method for manufacturing hollow part is further provided, including the following steps of: providing the inner mold; covering the inner mold with a part material; heating the inner mold which is covered with the part material to form the part material; and heating the inner mold covered with the part material which is formed at a predetermined temperature to melt the inner mold out of the part material which is formed to form the hollow part.

Abstract: Disclosed is a method for extending a shelf life of vinyl ester resin or unsaturated polyester resin during transportation or general storage. The method includes the step of enhancing an oxygen content of the vinyl ester resin or the unsaturated polyester resin, such that the self-polymerization reaction of reactive functional groups having carbon-carbon unsaturated double bonds of the vinyl ester resin or the unsaturated polyester resin can be minimized, so as to slow down occurrence of a gelation phenomenon of the vinyl ester resin or the unsaturated polyester resin in a long-time transportation or storage, and further to decrease a monetary loss.

Abstract: Disclosed is a method for extending a shelf life of vinyl ester resin or unsaturated polyester resin during transportation or general storage. The method includes the step of enhancing an oxygen content of the vinyl ester resin or the unsaturated polyester resin, such that the self-polymerization reaction of reactive functional groups having carbon-carbon unsaturated double bonds of the vinyl ester resin or the unsaturated polyester resin can be minimized, so as to slow down occurrence of a gelation phenomenon of the vinyl ester resin or the unsaturated polyester resin in a long-time transportation or storage, and further to decrease a monetary loss.