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. 2022 Aug 19;15(16):5731.
doi: 10.3390/ma15165731.

The Possibility of Using Pine Bark Particles in the Chipboard Manufacturing Process

Radosław Mirski  1 , Adam Derkowski  1 , Jakub Kawalerczyk  1 , Dorota Dziurka  1 , Joanna Walkiewicz  1
Affiliations

The Possibility of Using Pine Bark Particles in the Chipboard Manufacturing Process

Radosław Mirski et al. Materials (Basel). .

Abstract

This research evaluated the possibility of using sawmill by-products from the roundwood-processing line in the production of wood-based panels. Due to its number of favorable properties, interesting chemical composition and large reserves resulting from the lack of industrial applications, the research focused particularly on the use of bark. Manufactured variants of boards differed in the proportions of wood chips to bark (70:30, 60:40, 50:50). Moreover, the boards containing only wood chips and a mixture of chips and sawdust were used as references. Urea-formaldehyde adhesive mixed with ammonium nitrate as a hardener was applied as a binding agent for the boards. Based on the mechanical properties (modulus of elasticity, modulus of rupture, internal bonding), physical properties (density, thickness swelling, water absorption) and content and emission of formaldehyde, it was found that it is possible to produce boards characterized by good properties from sawmill by-products without advanced processing. Moreover, the use of bark instead of sawdust in order to increase the homogeneity of the cross-section allows one to obtain panels with significantly lower formaldehyde emission and water uptake.

Keywords: bark; chipboard; sawdust; wood chips; wood-based material.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Materials used for the production of boards: (a) bark particles before grinding; (b) bark particles after grinding; (c) wood chips; (d) sawdust.
Figure 2
Figure 2
Fractional compositions of sawdust and bark.
Figure 3
Figure 3
Schematic presentation of the board production process.
Figure 4
Figure 4
Cross-sections of the boards: (a) with bark particles (variant A); (b) with sawdust (variant D); (c) only with wood chips (variant E) (dashed circles indicate filled spaces; solid circles indicate void spaces).
Figure 5
Figure 5
Modulus of elasticity results depending on the board variant (letters A–E mark variants of the boards).
Figure 6
Figure 6
Modulus of rupture results depending on the board variant (letters A–E mark variants of the boards).
Figure 7
Figure 7
Internal bonding results depending on the board variant (letters A–E mark variants of the boards).
See this image and copyright information in PMC

References

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