The properties of particles produced from waste plywood by shredding in a single-shaft shredder

Laskowska, Agnieszka; Mamiński, M.

doi:10.4067/s0718-221x2020005000206

Cited by 7 publications

(9 citation statements)

References 13 publications

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“…Generally, results related to lower mechanical properties of PBs containing particles from recycled spruce pallets are in accordance with [42][43][44][45][46]. Compared to the requirements by the standard EN 312 [33], the PBs based on RSP achieved in all cases the IB 0.35 MPa needed for the particleboard type P2.…”

Section: Physical and Mechanical Properties Of Pbssupporting

confidence: 63%

“…The decay attack of PBs with the brown-rot fungus Serpula lacrymans was only slight, with a maximum of about 15.4%-inhibited at a higher portion of particles from RSP (Table 4, Figure 9). Due to the 16-week action of S. lacrymans, the average mass loss (∆m) of the reference PB-C was equal to 13.20%, while the PB-RSP-100 (containing only particles Generally, results related to lower mechanical properties of PBs containing particles from recycled spruce pallets are in accordance with [42][43][44][45][46]. Compared to the requirements by the standard EN 312 [33], the PBs based on RSP achieved in all cases the IB 0.35 MPa needed for the particleboard type P2.…”

Section: Biological Resistance Of Pbsmentioning

confidence: 98%

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Particleboards from Recycled Pallets

Iždinský

Reinprecht

Vidholdová

2021

Forests

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Worldwide production of wooden pallets continually increases, and therefore in future higher number of damaged pallets need to be recycled. One way to conveniently recycle pallets is their use for the production of particleboards (PBs). The 3-layer PBs, bonded with urea-formaldehyde (UF) resin, were prepared in laboratory conditions using particles from fresh spruce logs (FSL) and recycled spruce pallets (RSP) in mutual weight ratios of 100:0, 80:20, 50:50 and 0:100. Particles from RSP did not affect the moisture properties of PBs, i.e., the thickness swelling (TS) and water absorption (WA). The mechanical properties of PBs based on particles from RSP significantly worsened: the modulus of rupture (MOR) in bending from 14.6 MPa up to 10 MPa, the modulus of elasticity (MOE) in bending from 2616 MPa up to 2012 MPa, and the internal bond (IB) from 0.79 MPa up to 0.61 MPa. Particles from RSP had only a slight negative effect on the decay resistance of PBs to the brown-rot fungus Serpula lacrymans, while their presence in surfaces of PBs did not affect the growth activity of moulds at all.

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Section: Physical and Mechanical Properties Of Pbssupporting

confidence: 63%

Section: Biological Resistance Of Pbsmentioning

confidence: 98%

Particleboards from Recycled Pallets

Iždinský

Reinprecht

Vidholdová

2021

Forests

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“…An increase in the volume of PB manufacturing has resulted in manufacturers seeking new material resources. At the present time, besides natural wood, other lignocellulose materials [2][3][4], as well as recycled wood [5,6], are used, especially in countries where there is a scarcity of wood resources [7].…”

Section: Introductionmentioning

confidence: 99%

Particleboards from Recycled Wood

Iždinský

Vidholdová

Reinprecht

2020

Forests

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The effective recovery of wood waste generated in wood processing and also at the end of wood product life is important from environmental and economic points of view. In a laboratory, 16 mm-thick three-layer urea–formaldehyde (UF)-bonded particleboards (PBs) were produced at 5.8 MPa and 240 °C and with an 8 s/mm pressing factor, using wood particles prepared from (1) fresh spruce wood (C), (2) a mixture of several recycled wood products (R1), and (3) recycled faulty PBs bonded with UF resin (R2). Particles from spruce wood were combined with particles from R1 or R2 recyclates in weight ratios of 100:0, 80:20, 50:50 and 0:100. In comparison to the control spruce PB, the PBs containing the R1 recyclate from old wood products were characterized by lower thickness swelling after 2 and 24 h (TS-2h and TS-24h), lower by 18 and 31%; water absorption after 2 and 24 h (WA-2h and WA-24h), lower by 33 and 28%; modulus of rupture in bending (MOR), lower by 28%; modulus of elasticity in bending (MOE), lower by 18%; internal bond (IB), lower by 33%; and resistance to decay determined by the mass loss under the action of the brown-rot fungus Coniophora puteana (Δm), lower by 32%. The PBs containing the R2 recyclate from faulty PBs were also characterized by a lower TS-2h and TS-24h, lower by 45% and 59%; WA-2h and WA-24h, lower by 61% and 51%; MOR, lower by 37%; MOE, lower by 17%; and IB, lower by 33%; however, their biological resistance to C. puteana was more effective, with a decreased Δm in the decay test, lower by 44%.

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“…The obtained fiber with a grinding fineness of 5°SR is insufficient for preparation of MDF (Tab. 5), due to the high proportion of fiber 16 The fiber distribution (Tab. 5) shows a good agreement in the amount of rough fiber 16 (40 mesh) and a higher value of the middle fine fiber 50 (120 mesh) at 13°SR.…”

Section: Preparation Of a Fiber Board From Recycled Pbmentioning

confidence: 99%