MC Ferticom Co. Ltd.

The effect of curing condition such as curing time, curing humidity and adhesive thickness on an adhesive strength of one-component moisture curable cyanoacrylate adhesive was investigated exptl.The fracture surface of adhesively bonded joint was also observed to investigate curing time influence.A stress when the single lap joint was fractured under tensile test was defined as the adhesive strength.The adhesive strength was measured from 10 min to 168 h after being adhered.Gel cyanoacrylate adhesive of which curing time is slow was used to investigate adhesion process.A structural rolled steel SS400 was adapted as adherends which were adhered to make a single lap joint for a tensile test.The adherend surface was fabricated by milling and grinding process.The time between adhesive coating and adherend assembling was observed to avoid the effect of that time.The polymerization reaction of cyanoacrylate during curing was also investigated.The adhesion was coated 0.02mm thickness on a specimen.The Ramen intensity of C=C (double coupling) of which wavenumbers is around 1620 cm^-1 in the adhesive was observed by using IR absorption spectrum and Ramen scattering spectrum methods.The correlation among the measured intensity, the adhesive strength and the curing time was identified by the analyzation of these coupling processes of adhesion and the tensile test of the single lap joint.

A review discussing about the promoting effect of sludge mixed compound fertilizer on the phosphate absorption by Brassica rapa var perviridis.

We examined methods of producing a new slow-release fertilizer that retains long-term fertilizer efficiency, even during continuous short-term cultivation and long-term cultivation, following the application of a single basal dressing.The aim for this new slow-release fertilizer is long-term fertilizer efficiency not currently possible with conventional slow-release fertilizers.We produced several types of compound fertilizer with different ratios of methylol urea polymerization fertilizer (MU) and acidic fertilizer raw materials (magnesium sulfate and superphosphate).The degree of decomposition of the MU fertilizer differed according to the ratio of fertilizer components.By combining several of these compound fertilizers with different degrees of MU decomposition, we could produce a new slow-release fertilizer that was designated as a mixed fertilizer.