Utilization of waste of plywood, MDF and MDP for the production of particleboards

Weber, Cristiane; Iwakiri, Setsuo

doi:10.5902/1980509818460

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Artigos • Ciênc. Florest. 25 (2) • June 2015 • https://doi.org/10.5902/1980509818460 copy

Utilization of waste of plywood, MDF and MDP for the production of particleboards

Authorship SCIMAGO INSTITUTIONS RANKINGS

This study aimed to evaluate the potential use of plywood, MDF and MDP to manufacture particleboards. The resin urea formaldehyde (UF) was used in the production of the panels in proportions of 6% and 10% based on dry weight of wood particles, along with 2% of catalyst, and 1% of paraffin. The experiment comprised 10 treatments with three replicates each, totaling 30 panels. The panels were manufactured with residues in the proportions of 100%, 50-50% and 33-33-33%. The panels were subjected to the following tests of physical and mechanical properties: board density, water absorption and thickness swelling - 24 hours, static bending, screw withdraw strength (surface and top) and tension perpendicular to surface (internal bond).The results were evaluated according to the requirements of EN and ABNT standards. The general evaluation of the results of physical and mechanical properties of the panels showed the technical feasibility of the use of residues of MDF, MDP and plywood and their mixtures for particleboard manufacture. The possibility of the use of these residues contributes in terms of economical and environmental issues.

particleboard; MDF; plywood; waste of panels

Tratamento	Resíduos	Proporção de resina (%)	Proporção de misturas dos resíduos (%)
T1	MDP	10	100
T2	Compensado	10	100
T3	MDF	10	100
T4	MDP e MDF	10	50/50
T5	MDP e compensado	10	50/50
T6	Compensado e MDF	10	50/50
T7	MDP, compensado e MDF	10	33/33/33
T8	MDP	6	100
T9	Compensado	6	100
T10	MDF	6	100

Tratamentos	Densidade Média (g/cm³)	Teor de umidade Média (%)
T1 – MDP¹	0,741 bc	8,67 d
T2 – C¹	0,729 abc	8,87 e
T3 – MDF¹	0,765 c	7,34 a
T4 – MDP/MDF	0,743 bc	8,02 b
T5 – MDP/C	0,746 bc	8,64 d
T6 – C/MDF	0,730 abc	8,13 bc
T7 – MDP/C/MDF	0,763 c	8,27 c
T8 – MDP²	0,681 a	8,65 d
T9 – C²	0,702 ab	8,96 e
T10 – MDF²	0,714 abc	7,42 a

Tratamentos	Absorção de água	Inchamento em espessura
Tratamentos	24 horas(%)	24 horas (%)
T1 – MDP¹	25,13 cd	10,51 bc
T2 – C¹	44,33 e	19,80 e
T3 – MDF¹	18,50 ab	6,42 a
T4 – MDP/MDF	16,17 a	7,05 a
T5 – MDP/C	29,13 d	12,92 c
T6 – C/MDF	21,82 bc	7,96 ab
T7 – MDP/C/MDF	20,56 abc	7,88 a
T8 – MDP²	29,25 d	16,65 d
T9 – C²	57,41 f	32,26 f
T10 – MDF²	17,45 ab	8,65 ab

Tratamento	MOR	MOE	Tração perpendicular à superfície
Tratamento	Média (MPa)	Média (MPa)	Média (MPa)
T1 – MDP¹	6,47 abc	1185,43 abc	0,54 de
T2 – C¹	6,88 bcd	1429,51 bc	0,48 bcde
T3 – MDF¹	9,76 f	1129,31 ab	0,46 bcd
T4 – MDP/MDF	8,23 cdef	1168,09 abc	0,56 e
T5 – MDP/C	5,75 ab	1522,31 c	0,51 cde
T6 – C/MDF	9,09 ef	1405,76 bc	0,55 e
T7 – MDP/C/MDF	8,44 def	1438,93 bc	0,50 cde
T8 – MDP²	4,93 a	882,96 a	0,44 bc
T9 – C²	5,59 ab	1236,38 abc	0,40 b
T10 – MDF²	7,86 cde	1158,75 ab	0,26 a

Tratamento	Superfície	Topo
Tratamento	Média (N)	Média (N)
T1 – MDP¹	1049,48 bcd	1066,75 def
T2 – C¹	996,36 bcd	1004,31 de
T3 – MDF¹	887,83 ab	934,03 cd
T4 – MDP/MDF	1200,12 d	1345,69 g
T5 – MDP/C	810,36 ab	591,13 a
T6 – C/MDF	1140,08 cd	1258,63 fg
T7 – MDP/C/MDF	1195,43 d	1201,31 efg
T8 – MDP²	870,94 ab	718,17 abc
T9 – C²	905,48 abc	846,75 bcd
T10 – MDF²	723,73 a	621,74 ab

Universidade Federal de Santa Maria Av. Roraima, 1.000, 97105-900 Santa Maria RS Brasil, Tel. : (55 55)3220-8444 r.37, Fax: (55 55)3220-8444 r.22 - Santa Maria - RS - Brazil
E-mail: cienciaflorestal@ufsm.br

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[TFN02] Em que: 1 10% resina; 2 6% resina. Médias seguidas de mesma letra não diferem estatisticamente pelo Teste de Tukey ao nível de 95% de significância.