Tag Archives: bonding technology

285-290 M. Müller and P. Valášek
The logistics aspects influencing the resultant strength of adhesives at practical application
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The logistics aspects influencing the resultant strength of adhesives at practical application

M. Müller* and P. Valášek

Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Science, Kamýcká 129, 16521 Prague, Czech Republic; *Correspondence: muller@tf.czu.cz

Abstract:

Practical application of construction adhesives is required under various climatic conditions and in various environments. The temperature of an environment alone is regarded a limiting factor from the logistics point of view influencing the effectiveness of subsequent application, namely in winter months. The aim of the experimental part is to define the influence of temperature as an essential logistics factor subsequently influencing the resultant strength of the adhesive bond at its application. Further, redress of adhesives properties after extreme temperatures of storing, transit, etc. was investigated. Higher temperatures reached during the logistics flows negatively influence the adhesive bond strength. The temperature also influences change in the failure area.

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147-154 M. Müller
Research of liquid contaminants influence on adhesive bond strength applied in agricultural machine construction
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Research of liquid contaminants influence on adhesive bond strength applied in agricultural machine construction

M. Müller

Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Science, Kamýcká ¹²⁹, ¹⁶⁵²¹ Prague, Czech Republic; e-mail: muller@tf.czu.cz

Abstract:

An  adhesive  bonding  technology  is  a  prospective  bonding  technology  of  diverse materials.  Namely the research in the  sphere of the degradation aspects affecting the adhesive bond  during  the  technical  life  of  the  adhesive  bonded  complex  is  essential.  Mineral  and industrial fertilisers can be included as significant degradation agents. The aim of the research was to find out the relevant knowledge in the sphere of the degradation of the adhesive bonds placed in the water bath, the oil bath and the solution of the mineral and industrial  fertilisers.  The  experiment’s  results  bring  knowledge  for  producers  of  agricultural machines  introducing  adhesive  bonding  technology  into  their  production  programme.  Two-component constructional epoxy adhesives were tested which were placed into the water bath, the  oil  bath  and  the  solution  of  mineral  and  industrial  fertilisers.  Some  agents  caused  such changes in the adhesive that the adhesive bond strength decreased to zero value already after ⁹0 days.  Significant  changes  of  the  adhesive  bond  strength  occurred  in  the  interval  ¹⁵–⁴⁵  days depending on the adhesive and agents. The strength decrease was connected with the change of a  failure  area  from  cohesive  one  to  combined  and  then  to  adhesive  one.  The  research  showed that it came to diffuse seepage and to a partial corrosion of the adhesive bonded steel samples.

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155-162 M. Müller, and P. Valášek
Assessment of bonding quality for several commercially available adhesives
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Assessment of bonding quality for several commercially available adhesives

M. Müller¹,* and P. Valášek²

¹Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Science, Kamýcká 129, 16521 Prague, Czech Republic;
*Correspondence: muller@tf.czu.cz
²Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Science, Kamýcká 129, 16521 Prague, Czech Republic

Abstract:

An  adhesive  bonding  technology  is  a  prospective  bonding  technology  of  diverse materials.  For  successful  practical  application,  knowledge  gained  by  studying  factors  that significantly influence mechanical properties of the adhesive bonds are essential. The adhesive bond  rise  is  influenced  by  an  increase  of  chemical  –  physical  links.  The  adhesive  bonding strengthens its position in a number of agricultural machines and tools.  The aim of the experiment is to create the adhesive bond which provides the maximum strength and  quality  for  single  combination  of  the  adhesive  and  adherents,  usually  at  minimum  costs. This aim can be reached by describing the process of the hardening and ensuring the optimum adhesive  layer.  Describing  the  adhesive  bonding  process  and  its  factors  is  essential  for companies producing agricultural machinery. From the results of the experiment there is visible a significant fall of the tensile shear strength of  the  adhesive  bond  with  increasing  time  needed  for  the  adhesive  bond  creation.  The experiment  results  also  certified  the  negative  influence  of  the  unequal  adhesive  layer  on  the strength fall but also a huge dispersion variance of results.

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