溶融固化型バインダと等大球粒子からなる造粒体の強度に関する若干の推定

プラスチックをバインダとする固形廃棄物の建材化に関する基礎的研究

抄録

Referring to the agglomeration of particulate materials with the aid of hot melt binder like thermoplastic resins we gave a deductive discussion through some numerical evaluations according to a binder bridge model which is introduced through the modification of an wellknown model about liquid bridge between two neighbouring homegeneous spheres. Our discussion is restricted within the case where particulate material is composed of homogeneous spheres and that the porosity of the agglomerate is located in a limited range.
The results may be summerized as follows: a. A critical mixing ratio of binder to spherical particles required to get an agglomerate with satisfying strength was proposed, which depends not on the size of particle, but on the contact angle of the binder to particles and the porosity of the agglomerate to be prepared.
b. It is recommendable to choose binders with lower contact angle to particle for the purpose of saving the consumption of binder.
c. The dimensional ratio of liquid bridge to spherical particle does not depend on the particle size if the mixing ratio of binder and the porosity of agglomerate are fixed.
d. As the adhesive strength of hot melt binder to solid particle is normally much smaller than the tensile strength of binder material, it is to consider that the-binding mechanism between particles depends on whether particle surface is fully coated with the binder through the preliminary mixing of particle-binder system.
In either case, we think, the procedure mentioned in this paper indicates a possibility of estimating tensile strength of form agglomerate.