The effect of urea resins synthesized with different mole ratios on physical properties of high density fiberboards (HDF) and formaldehyde emission

Abstract

The indispensable product of living spaces, the raw material of high density fiberboard (HDF) based derivative products (laminate flooring derivatives, etc.) are HDF boards. The test values (physical and formaldehyde emission properties ) of HDF boards are targeted both physical properties and formaldehyde emission E1 or E0 standard. In this study, 50% yellow pine (Pinus sylvestres L), 30% fir (Abies nordmanniana L), 20% beech (Fagus orientalis L) were used biomass. HDF boards of 7.7mmx2100mmx2440mm were produced on the production line which using three different moles of urea-formaldehyde resins (R; 1.17, X; 0.98 and Y; 0.88). Production parameters remained constant in the HDF line process and the only variable were urea formaldehyde resins used in three different molar ratios. The productions were manufactured in pressing speed of 950 mm/second and pressing temperature 215ºC and 60 seconds pressing time in the continue hot press. R, X, Y HDF boards produced; physical tests (thickness, density, board moisture, 24 hours Thickness-swelling and 24 hours water absorption) and formaldehyde gas emissions were analysed which was five boards were measured from each test group. Physical properties of HDF boards were measured which was the density of boards (R; 874 kg/m³, X; 881 kg/m³ and Y; 860 kg/m³) Thickness swelling of boards at 24 hours (R; 17.79%, X; 19.65% and Y; 19.08%) water absorption of boards at 24 hours (R; 19.65%, X; 19.09% and Y; 22.42%). Formaldehyde gas emission result of HDF boards were analysed (R; 14.96, mg/100g. X; 8.28 mg/100g and Y; 6.79 mg/100g). As a result of the study, differences were determined according to both physical test results and formaldehyde gas emission results for HDF boards produced.

Keywords

• HDF
• Physical properties
• Urea formaldehyde
• Moles ratio
• Formaldehyde emission

Farklı mol oranlarıyla sentezlenen üre reçinelerinin yüksek yoğunlukta lif levhaların (HDF) fiziksel özelliklerine ve formaldehit emisyonuna etkisi

Abstract

Yaşam alanlarının vazgeçilmez ürünü yüksek yoğunlukta lif levha (HDF) bazlı ve türevi ürünlerin (laminant parke türevleri vb.) hammaddesi HDF levhalarıdır. HDF levhalarının fiziksel test değerleri ilgili standart değerlerde ve formaldehit emisyonun E1 veya E0 olması hedeflenmiştir. Bu çalışmada, yüksek yoğunlukta lif levha üretim hattında %50 sarıçam (Pinus sylvestres L.), %30 göknar (Abies nordmanniana L.), %20 kayın (Fagus orientalis L.). Üretim hattında üç farklı mol üre-formaldehit reçinesi (R; 1.17, X; 0.98 ve Y; 0.88) kullanılarak 7.7mmx2100mmx2440mm HDF levhalar üretildi. Proseste üretim parametreleri sabit kalmıştır. Tek değişken üç farklı mol oranlarında kullanılan üre formaldehit tutkalı olmuştur. Sıcak pres parametrelerinden pres hızını 950 mm/sn ve pres sıcaklığını 215ºC ve 60 saniye presleme süresi parametrelerinde üretim gerçekleşmiştir. Üretilen R, X, Y HDF levhaların; fiziksel testlerine (kalınlığına, yoğunluğu, levha rutubetine, 24 saat suda kalınlığına şişme ve 24 saat su alma) ve formaldehit gaz emisyonuna bakılmıştır. Her bir test grubundan beş levha ölçülmüştür. HDF levhalarının fiziksel özellikleri, özgül ağırlığı R;874 kg/m³, X;881 kg/m³ ve Y;860 kg/m³, kalınlığına suda şişmesi 24 saat R; %17.79, X; %19.65 ve Y; %19.08, 24 saat su alma R; %19.65, X; %19.09 VE Y; %22.42 ölçülmüştür. Formaldehit gaz emisyon değerleri R; 14.96, mg/100g. X; 8.28 mg/100g ve Y; 6.79 mg/100g analiz edilmiştir. Çalışmanın sonucunda (R;1.17, X;0.98 ve Y;0.88) mol üre formaldehit kullanarak üretilen HDF levhalarına hem fiziksel test sonuçları hemde formaldehit gaz emisyonu sonuçlarına göre farklılıklar ortaya konulmuştur.

Keywords

• HDF
• Fiziksel özellikler
• Üre formaldehit
• Mol oranı
• Formaldehit emisyonu

Thanks

Kastamonu Entegre Ağaç Sanayi Tic. A.Ş, Kastamonu-Samsun Fabrikalar Direktörü Enüs KOÇ’a, Tutkal üretim müdürü Uğur ÇELİK’e yardımlarından dolayı teşekkür ediyorum.

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