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Study of the effect of composite elements on bonding strength of composite board
Okcu, Oktay
In order to make a composite board in any scope, the main question about quality specification is how we can make it stronger. We studied the elements and parameters included in a composite board such as the materials and combinations of them, or how to combine them. Then we designed a suitable experimental test to measure the bonding strength of the boards. We tried to choose the most applied materials in the wood industry, and sourced them from two countries i.e. Turkey and Czech Republic. The result and Conclusions of this research is useful for who they want to enter in this industry or who are trying to have competitive advantages by searching for a better way of manufacturing the raw materials e.g. composite boards, or the products of decorative and wood appliance industry.
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Vliv složení směsi UF lepidla a disperzního PVAc lepidla na pevnost lepeného spoje
Haškovec, Ivo
The thesis deals with the influence of mixture of the mixed adhesive and dispersion PVAc adhesive for bonding strength in shear strength. For the testing were selected two economically very important wood species (the spruce and beech wood) which are used in construction, furniture and building industry. All samples were grouped by the type of adhesive and by the temperature used for 28 days conditioning. All samples were bonded with coating 120 g/m2. After bonding, pressing and conditioning to required temperature were all samples subjected to a test, which examines the bonding strength in shear. The thesis deals with the comparison of the results and examines the effect of the adhesive mixture to bonding strength.
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Vliv lepidla na pevnost lepených spojů za zvýšených teplot
Vrbová, Lenka
The goal of this thesis is an analysis of the influence of the adhesive material on the characteristic strength of the adhesive bonded joint. The adhesive material used was exposed to the cyclic thermal loading of the environment around the adhesive bonded joint of ABS and PB furniture edges. The solidity of adhesive bonded joint was tested by loading of the joint, which was achieved by peeling of the ABS edge at 90° angle. Only standard materials, commonly accessible and utilised in the furniture industry, were used during the test. The results of the gauging were processed and analysed.
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Posouzení jakosti lepení po temperovaném uložení ve vodě
Šulák, Radek
Subject of this thesis is to assess the quality, strength and durability of selected types of synthetic adhesives bonded prism EURODECK. As materials were selected native trees oak and beech. The main idea of this work was to determine the properties of glued blocks EURODECK in a moist environment when selecting these species. The work consists of theoretical and practical part. The theoretical part contains basic information and description of the bonded materials. The practical part consists of methodology, conducted the experiment and subsequent performance tests on a tensile tester storage and tempered in water bath. The work contains tables and graphs with measured values.
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Posouzení možnosti použití kamenné dýhy na opláštění konstrukčních materiálů
Lipták, Jan
Abstract Author: Bc. Jan Lipták Title: Review of the possibility of the use of the stone veneer for constructional materials sheathing The aim of the diploma thesis was to review whether the stone veneer is suitable or comparable material for sheathing constructional materials. The beech veneer was used for the comparison. Firstly, the history of the veneers and the decorative veneers manufacturing are described in the theoretical part. Then it is focused on the stone treatment, its history and the manufacturing of the stone veneer. The next part of the thesis deals with the methods of the stone and beech veneer testing: bending strength tests, glue strength tests, humidity and density assessing and tests of the surface working resistance to a falling small ball. Further, results of measurements are presented in form of tables and graphs. The results proved that the stone veneer is comparable to the beech veneer that reached better results in bending strength. The stone veneer is better in the glue strength. The density tests pointed out the higher density of the stone veneer. The humidity is influenced by the density and the stone veneer samples were of lower humidity. The tests of the surface working resistance to a falling small ball did not recorded notable differences, the degree of the damage was assessed to be of the level 4. The last part of the thesis comprises the discussion, conclusion and literature references.
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Porovnání kvality lepeného spoje v závislost na druhu spojovaného materiálu při plazmatické úpravě dřeva
Masařík, Lukáš
The work concerns in modern surface treatment, such as cold plasma. The main aim of this work was to find out the effect of plasma treatment on the surface of wood applied before glue treatment which is influential in final quality of glueing. The work compares the firmness of glued joint of solid wood-fibre slab -- HDF and locust tree on groups of samples of treated and non-treated surface in different plasma discharges. The first part of the work comprises a summary of knowledge in the plasma field and glueing and it attempts to establish a general overview of present development in research in the field of examined issue. The second part of the work deals with method of performed experiment according to the researched norms. Results of the work have proven that plasma preparatory treatment influences the firmness of glueing and at a certain type of use of plasma discharge we can improve the quality of glued joint.
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Pevnost lepeného spoje vodáckých pádel
Jonáš, Martin
This work deals with the strength of the bond with paddles made of solid wood. The samples were made of solid wood blanks from spruce, alder and ash. There were used three types of adhesives in samples - polyvinyl acetate, melamine-urea-formaldehyde and epoxy resins. For these samples the effect of the species and different types of adhesive bonded joints for strength in bending was studied. Also described herein is cutting samples, bonding joints and their testing methodology. In the literature review are discussed various issues such as conditions affecting the adhesive bond, the adhesive film formation components adhesives etc., that are associated with this topic.
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