Research Development Of Using Technology Characterizing And Performances For Water Solubled Material

Fiber twist processing is an important technique with which contitinuous fiber(or cloth,pre-dipped yarn etc.)pre-dipped in ester emulsion is twisted around the core in turn,then solidizing, unloading to get the product. During this process,it is hard for many products to be unloaded,some even cannot be unloaded. This research is focused on the aqueous soluble core binder,the researchers prefer that after twisting process, filling in some water can solve the mold and get it out,which must not destroy the end-product,with compress sthength of 1.5-2MPa, fit surface smoothness, dimensional stability during twisting and solidizing.The latest and recent research and developments of aqueous solubility adhesives (used for core binder of domestic and national) are described in this paper .The problems in the development of using technology for water-borne adhesives used in core binder were offered here, a new way is introduced here, using property-modified starch adhesion agent mixed with filler ,with which to make up the new type of aqueous core binder composite . A better aqueous property on the basis of keeping its mechanics property could be realized here.It is used mainly on abio-adhesives such as plaster soluble glass and ceramic etc. and organic adhesives such as polyethylene alcohol,polyethylene glycol,polypropylene ester and so on home and abroad .These ways had some disfigurement in some degree. Duing to their configuration , the ramification of natural macromolecule can keep their mechanical property and improve their aqueous property. At the same time the ramification of natural macromolecule had good compatibility which can promote the interface combination. So it is possible to use the mixture of hollow glass-beads and the ramification of natural macromolecule.The way of using modified starch as the matrix and hollow glass-beads as filler is investigated to make aqueous core binder. The correlation between its configuration and property was analysised and its aqueous property was estimated here. The samples are aqueous, showing good mechanical property. It proved fit for spaceflight fiberglass twist which can promote the manufacture of moulding.The configuration of this aqueous core binder system was the fine-combined mixture which was made up of the dispersed solid grain (hollow glass-beads) and the continuous phase(modified starch).At the normal temperature,the mixture can be made by molding . The results show higher mechanical properties and aqueous solubility.The composition was optimized in order to get a sample with best comprehesive properties. The content of the hollow glass-bead ,urea and starch was studied to find their influence on the composite.The conclusion is: urea can improve composite's aqueous solubility and lower the manufaturing costs. While filling in 10%(wt) hollow glass-beads, sample appears better general properties. At the same time no less than 50%(wt )modified starch should be used as the matrix,otherwise the moulding must be very hard. The optimum is 6%(wt )urea, 10%(wt) hollow glass-beads and 90% (wt) modified starch.