Annals of Warsaw University of Life Sciences - SGGW

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Similar experiments were carried by MAMINSKI et al. (2007). Authors found out that shear strength increased with increasing amount of added GA up to 9 wt. %, GA addition above that value resulted in decrease of shear strength by the plasticization effect. UF adhesive with AG and HC Proteins are the base of some adhesives, so in the second step, we tested influence of collagen hydrolysate (HC) on shear strength and water resistance of glued joints. Hydrolysate added is partial substitute of some part of the adhesive, and at the same time, it is an additive that can markedly influence physical-chemical properties of the adhesive and adhesive joint. HC was added into the adhesive with Hr3 in amount of 3 %, 5 % or 8 %. Shear strength after conditioning for adhesive class Nr.1 are given in tab. 2. Tab. 2 Shear strength according to EN 314-1,2 standard for adhesive class Nr.1 Adhesive mixture Average Shear strength [MPa] Standard deviation [MPa] Coefficie nt of variation [%] Measured value min. [MPa] Measured value max. [MPa] number [pcs] UF+Hr3 2.48 0.34 13.84 1.95 3.08 23 UF+ Hr3+ 3%HC 2.12 0.44 20.73 1.45 2.74 21 UF+ Hr3+ 5% HC 2.28 0.49 21.70 1.52 3.04 21 UF+ Hr3+ 8% HC 1.86 0.37 19.72 1.19 2.41 21 Shear strength of all tested specimens, in adhesive class Nr.1, met the standard and exceeded required value of 1.0 MPa. HC added in three tested levels little decreased shear strength when compared with reference sample. The highest value of shear strength reached adhesive mixture with 5 % HC. The influence of HC on shear strength was evaluated by onefactor statistical analysis; factor “adhesive mixture” influenced plywood shear strength statistics significantly. In fig.2 we can see that highest value of shear strength was measured at sample without HC and lowest value at sample containing 8 % HC. According to Duncan test, the influence of adhesive mixture containing 8 % HC onto shear strength of glued joint is different statistical significantly when compared with others mixtures (containing HC in amount of 0 %, 3 % and 5 %, as well). As specimens conditioned for adhesive class Nr.2 collapsed at boiling test, reference sample, and samples glued with adhesive mixture with Hr3 and HC have to be classified as adhesive class Nr.1. Expected possibility to classify the adhesive mixtures with AG and HC in class Nr.2 was not confirmed. 40
2,4 Ver tic alba rs den ote 0,9 5 c o nf iden c e inter v al s 2,3 2,2 2,1 šmyk 2,0 1,9 1,8 1,7 1,6 1,5 UFTvR UFTv1 UFTv3 UFTv5 lz Fig.1 Hardener with activator AG šmyk 2,8 2,7 2,6 2,5 2,4 2,3 2,2 2,1 2,0 1,9 1,8 1,7 1,6 1,5 Vertical bars denote 0,95 confidence intervals UFTv3R UF3HKTv3 UF5HKTv3 UF8HKTv3 lz Fig.2 UF adhesive with AG and HC 41
Page 1 and 2: Annals Warsaw University of Life Sc
Page 3 and 4: ZIELIŃSKA-SZWAJKA JOANNA, GÓRSKI
Page 5: Board of reviewers: Bogusław Bajko
Page 8 and 9: analysis done on its base are one o
Page 10 and 11: On the base of the analysis, we sug
Page 12 and 13: Annals of Warsaw University of Life
Page 14 and 15: and analyzed on the level of tax ad
Page 16 and 17: REFERENCES: 1. Daňové trestné č
Page 18 and 19: description, selection and systemat
Page 20 and 21: Tab. 4 Regional foreign direct inve
Page 24 and 25: Опытные образцы пр
Page 26 and 27: EXPERIMENTAL PART The experimental
Page 28 and 29: 6. HENDARTO, B., SHAYAN, E., OZARSK
Page 30 and 31: Fiber direction - longitudinal Ra b
Page 32 and 33: Thickness of the paint coating film
Page 36 and 37: ises, together with its value, that
Page 42 and 43: CONCLUSION Based on the evaluation
Page 46 and 47: We can say that HC included in adhe
Page 48 and 49: 4. PARK, B.D., LEE, S.M., ROH J.K.
Page 50 and 51: plywood pressing). Spectra of liqui
Page 52 and 53: confirmed by the fact that the peak
Page 56 and 57: RESULTS AND DISCUSSION The obtained
Page 58 and 59: Streszczenie: Emisja VOC z filmów
Page 60 and 61: particleboards of 18 mm thickness l
Page 62 and 63: laminated particleboards released f
Page 66 and 67: of a rubber granulate mat, adhered
Page 68 and 69: Type of tests point I III III I III
Page 72 and 73: Parameter, unit Application method
Page 74 and 75: 3.2 Graph 3. Shear strength of glue
Page 76 and 77: property that is not directly inclu
Page 80 and 81: Die Idee, alte Papiere umzuarbeiten
Page 84 and 85: Table 1. Results of hardness tests
Page 86 and 87: cause faster and less even wear of
Page 90 and 91:
CH 2 OH CH CH 2 CH 2 OH CH CH 2 CH
Page 92 and 93:
Annals of Warsaw University of Life
Page 94 and 95:
supply increment of the ,,j” prod
Page 96 and 97:
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Basierend auf der Umfrage ergaben s
Page 100 and 101:
Bild 7. Standzeitdiagram - Vorschub
Page 102 and 103:
ANWENDUNGEN Die Ergebnisse dieser S
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Verhältnis der maximale Durchmesse
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Basierend auf der Umfrage, für die
Page 108 and 109:
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drills are described in the work of
Page 112 and 113:
Calculation of the thrust force and
Page 114 and 115:
CONCLUSION The idea of considering
Page 116 and 117:
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Fig. 4. Relationship between cuttin
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life observed for MDF is longer tha
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Table 1. Types and characteristics
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ACKNOWLEDGEMENT Investigations were
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That is why a proper treatment seem
Page 132 and 133:
CONCLUSIONS 1. Treatment of oil pal
Page 134 and 135:
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максимальной степе
Page 138 and 139:
REFERENCES: 1. Шубин Г.С. Ф
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MATERIAL AND METHODS Used method We
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TVOC emitted by various kind of woo
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tensile force the dynamics of these
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Streszczenie: Gęstość drewna wia
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it was attempted in this study to a
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Cameron and Dunham [1999], when com
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unstable joints made of metal were
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Photo 8. View of an incorrect joint
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called CORDA, while the lowest cont
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willow clone, whereas the clone des
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Fig.2. Modulus of rupture of partic
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a) P, % 100 90 80 70 60 50 40 30 20
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the connection, and too little surf
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■ Multidimentional air stream wit
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Fig. 2. Proportion of elements in l
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2. The highest efficiencies were fo
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Characteristic values of annual inc
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CONCLUSIONS The following conclusio
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that of particleboards with the cor
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Streszczenie: Właściwości eksper
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across the fibres on two counterpar
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CONCLUSION Obtained results allow t
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chamber PW 10 from firm HAMECH in H
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Fig.4. RMS of F w during milling of
Page 208 and 209:
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Fig.4. Influence of modification on
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Fig. 2. Changes in breaking length
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Fig.5. Changes in tear strength of
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e) f) Fig. 1 Thickness changes of v
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REFERENCES 1. KAFKA, E. a kol., 198
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produce underground rhizomes and it
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It results from a comparison of the
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Alternatywne źródła energii. Dob
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качества при длите
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3 Ширина годичного
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Table 2. Basic parameters of applic
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Table 5. Test results (average valu
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a) 6 weeks 12 weeks b) 3 months 7 m
Page 242:
- PN ISO 7724−2:2003 Farby i laki
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