Properties Of Plywood Research Articles

Study on flame retardant properties of Plywood Made with Eucalyptus, Birch and Poplar Wood

In this work, the laboratory-made flame-retardant polyvinyl alcohol adhesive was used to prepare flame-retardant plywood made with eucalyptus, birch and poplar respectively, and the effect of tree species on the Thermogravimetric behavior and flame-retardant properties of flame-retardant plywood was studied. Thermogravimetric behavior of the flame-retardant plywood prepared by eucalyptus, birch and poplar showed that poplar plywood had highest thermostability.The results of the SBI test are consistent with the results of the LOI test and Thermogravimetric analysis, both indicated that the tree species had a significant effect on the flame-retardant properties of the flame-retardant plywood, the flame-retardant plywood made with poplar veneer has the highest LOI value, lowest HRR value and lowest THR value.

Synergistic catalytic flame retardant effect of zirconium phosphate on the poplar plywood

The layered two dimensional material α-Zirconium Phosphate (α-ZrP) was used to explore its effect on the flame-retardant properties of plywood in this paper. First, the positively charged polyelectrolyte polyethyleneimine (PEI) and the negatively charged polyelectrolyte ammonium polyphosphate (APP) were adsorbed to the surface of poplar veneers through layer-by-layer (LBL) self-assembly technology, then the flame-retardant modified veneer was prepared for use. Followed by, urea formaldehyde (UF) resin composite adhesives with 9%, 15% and 24% mass fractions of α-ZrP were made. The flame-retardant plywood was prepared by modified veneers and composite adhesives. The chemical composition and combustion status of modified veneers were characterized using multiple techniques, including scanning electron microscope (SEM), energy dispersive spectrometer (EDS), attenuated total reflection infrared spectroscopy (ATR-FTIR) and veneer burning experiments. Through the rheological properties and bonding quality test, the appropriate addition amount of α-ZrP was determined to be 15%. The flame retardancy of modified plywood was assessed by the cone calorimeter (CONE). The results showed that the plywood with only UF composite adhesives and the plywood with only flame-retardant veneers have limited ability to inhibit heat release. When flame-retardant veneers were used in conjunction with composite adhesives, the peak Heat Release Rate (pHRR) and Total Heat Release (THR) of the plywood were reduced by 41.8% and 22.9%, respectively, and the ability to suppress heat was significantly improved. In addition, with the introduction of α-ZrP, the total smoke production and the concentration of toxic gas CO were significantly reduced. This showed that when α-ZrP was used in conjunction with APP, α-ZrP has excellent synergistic flame-retardant property on poplar plywood. The research results provide a strong basis for the application of α-ZrP in flame retardancy of the wood based composites.

ВЛИЯНИЕ ФАКТОРОВ ПРОЦЕССА ПРОИЗВОДСТВА НА ПОКАЗАТЕЛИ ФАНЕРЫ НА МОДИФИЦИРОВАННОМ ФЕНОЛОФОРМАЛЬДЕГИДНОМ СВЯЗУЮЩЕМ

To reduce production costs, FSF plywood is produced by pressing at a reduced temperature. However, at the same time, the resite stage is not provided for the phenol-formaldehyde binder, which results in a decrease in the physical and mechanical properties of plywood. In the world and Russian practice of scientific work, this problem is solved in various ways: by modifying the binder at the stage of its synthesis, by preliminary surface treatment of veneer, by modifying phenol-formaldehyde binder at the stage of synthesis or “on site”. To develop a rational combination of the values of the production process factors, which makes it possible to form a more durable structure of plywood during low-temperature pressing, a modification of the binder with the addition of dimethylglyoxime was used. An experiment was carried out on the B-plan of the 2nd order. The following varied: proportion of dimethylglyoxime addition (from 0.5 to 1.5% of the binder mass), pressing temperature (from 110 to 130 ºС), pressing time (from 4 to 5 min). Regression models have been developed for the ultimate strength of plywood when chipping along the adhesive layer, ultimate strength in static bending, and thickness swelling of plywood after 24 hours in water. It was found that with an increase in the proportion of dimethylglyoxime additive to 1.5%, the shear strength of plywood increases by 25%, the static bending strength by 30%, and thickness swelling by 10%. This allows us to conclude about the deepening of the process of structure formation of FSF plywood when pressed on a modified binder. Recommendations for the rational combination of the values of the factors of the production process of FSF plywood have been developed

Influence of different hot-pressing conditions on the performance of eco-friendly jabon plywood bonded with citric acid adhesive

ABSTRACT The citric acid (CA)-based adhesive, as a new environment-friendly adhesive, has been developed and used for the manufacturing of plywood to resolve the problem of formaldehyde-based adhesive for human health. The effects of pressing time and temperature on physical and mechanical properties of plywood were examined. Three-layer plywood panels were bonded using CA adhesive with a 134 g/m2 of single glue spread on White jabon wood veneer. The plywood panels were hot-pressed at 5 MPa with three different pressing temperatures, 180°C, 190°C, 200°C, for 10 min, and also different pressing times, 4, 7, 10 min at 190°C. The physical and mechanical properties, such as moisture content, delamination, and shear strength, were evaluated according to JAS 233:2003. The results show that the plywood with pressing temperature of 190°C for 10 min had lower delamination and greater tensile shear strength than those of other plywood panels. Moreover, some properties of the plywood fulfilled the requirement of JAS 233:2003. Based on the FTIR analysis, citric acid plays an important role in the formation of ester linkages (R-COO-R) via esterification between carboxyl groups of citric acid and hydroxyl groups of White jabon wood veneer, resulting excellent properties of plywood.

Physicomechanical properties and creep behavior of plywood composed of fully and partially heat-treated veneers

This study investigated the effect of heat-treated veneers on the physicomechanical properties and extended creep behavior of plywood using the stepped isostress method (SSM). The results revealed that the mechanical properties of plywood composed of fully and partially heat-treated veneers were not significantly different from those of the untreated plywood. In addition, the SSM was successfully applied to constructing the plywood creep master curves. The creep resistance of the heat-treated plywood surpassed that of the untreated plywood, especially the 5T200 plywood, which also exhibited the lowest compliance values of 0.13, 0.14, and 0.15 GPa−1 at 5, 10, and 20 years, respectively.

Yangın Geciktirici Kimyasallarla Emprenye Edilmiş Kontrplakların Retensiyon Miktarları ve Mekanik Dirençlerinin Yapay Sinir Ağları ile Tahmin Edilmesi

The treatment with fire retardant chemicals is the most effective process to protect wood and wood based products from fire is. Therefore, use of fire retardant chemicals has been increased. However, the fire retardant chemicals have an effect on other physical, mechanical and some technological properties of the materials treated with them. In this study, firstly, the retention level prediction model was developed with the artificial neural network (ANN) to examine the effects of wood species and concentration aqueous solution on the retention levels of veneers. Then, the effects of wood species, concentration aqueous solution and retention level on the mechanical properties of plywood were investigated with the mechanical strength prediction model developed with ANN. The prediction models with the best performance were determined by statistical and graphical comparisons. It has been observed that ANN models yielded very satisfactory results with acceptable deviations. As a result, the findings of this study could be employed effectively into the forest products industry to reduce time, energy and cost for empirical investigations.

Properties of Thermoplastic-Bonded Plywood: Effects of the Wood Species and Types of the Thermoplastic Films.

There are a lack of proper adhesives that meet the wood industry requirements of being environmentally friendly, low cost, and easy to use; thus, the application of thermoplastic polymers, especially films, is promising. This work expands our knowledge about the possibility of using thermoplastic films for the production of environmentally friendly plywood. The effects of the adhesives type and wood species on the properties of plastic film bonded plywood were studied. Sliced veneers of two hardwoods (birch and beech) and one softwood (spruce) were used in the experiments. Three types of thermoplastic films—low-density polyethylene (LDPE), co-polyamide (CoPA), and co-polyester (CoPE)—were used as an adhesive for bonding plywood samples. Melamine–urea–formaldehyde (MUF) resin was used as a reference. The influence of the type of adhesive and wood species as well as their interaction on the properties of plywood was significant. The lowest bonding strength demonstrated plywood samples bonded by LDPE, and the highest bonding strength in the samples was shown in those bonded by CoPA. A significant difference was found between softwoods and hardwoods in terms of their influence on the physical and mechanical properties of plywood samples. From the obtained data, it follows that softwoods provide much lower values of bending strength (MOR), modulus of elasticity (MOE), and bonding strength than hardwoods. The obtained bonding strength values of plastic-bonded plywood panels ranged from 1.18 to 2.51 MPa and met the European standard EN 314-2 for Class 1 (dry conditions) plywood.

Sifat Kayu Lapis yang Dibuat dari Lima Jenis Kayu Asal Riau

The objective of this study was to determine the physical and mechanical properties of plywood made of punak (Tetramerista glabra Miq.), meranti bunga (Shorea teysmanniana Dyer ex Brandis), mempisang (Alphonsea spp.), suntai (Palaqium burckii H.J.L.), and pasak linggo (Aglaia argentea Blume). Liquid urea formaldehyde (UF) was used as an adhesive. Data analysis was carried out using a completely randomized design. Results showed that the moisture content and density of plywood produced in this study were around 10.4-10.95% and 0.65 to 0.93 g/cm3, respectively. The modulus of elasticity (MOE) and modulus of rupture (MOR) of plywood produced were between 63.371-123.548 kg/cm2 and 517-1.052 kg/cm2, respectively. It was also found that the tensile strength and bonding strength of the plywood produced were 461.6-1.095 kg/cm2 and 18.97-31.79 kg/cm2, respectively. It was recorded that moisture content and the bonding strength of the plywood produced met the Indonesian National Standard of Plywood. Among others, plywood produced from pasak linggo showed a superior quality. Referring to statistical analysis, it was confirmed that physical and mechanical properties of plywood were significantly affected by wood species, except moisture content. Keywords: mechanical properties, physical properties, plywood, Riau wood species

Impact of phenol film grammage on selected mechanical properties of plywood

Impact of phenol film grammage on chosen mechanical properties of plywood. For the purpose of this research several plywood samples with a thickness of 15 mm were produced and coated, in industrial conditions, with 5 different variants of phenol films varying in terms of grammage (40/120 g/m2, 60/145 g/m2, 60/167 g/m2, 80/220 g/m2, 2 × 80/220 g/m2). Finished plywood was tested for abrasion resistance, MOR, MOE and density. It was concluded that higher grammage of phenol film increases wear resistance and final density of plywood. Plywood coated with two-layer phenol film with grammage of 80/220 g/m2 had 4 times higher rate of abrasion resistance in comparison with plywood coated with phenol film with surface density of 40/120 g/m2. Coating plywood surface with phenol films generally decreases MOR values, in comparison with uncoated plywood. In terms of MOE, there were no evidence of conclusive relation, despite statistically significant differences between each variant.

Physical mechanical properties of plywood made from lesser known wood veneers bonded with phenol formaldehyde adhesive

Indonesia plywood production becomes the third-largest after wood particle and pulp production. However, this production is not supported by the continuous availability of wood as raw materials, so the use of less-known wood species such as mempisang wood can be considered as alternative raw materials for plywood. This study aims to develop plywood from mempisang wood and investigate the effect of glue spread on the physical and mechanical properties of plywood. The plywood consisted of three veneers glued with various glue spread of phenol-formaldehyde resin (250 g/m2, 275 g/m2, dan 300 g/m2) using single spread method. The plywood was hot-compressed at 130°C for 5 minutes with specific pressures at 10 kg/cm2. Physical-mechanical properties of plywood were carried out based on JAS 233-2003. The higher of glue spread slightly improves the physical and mechanical properties of the mempisang plywood. The Moisture Content (MC), and Shear Strength (SS) values of the plywood satisfied the requirements for the JAS 233-2003 standard. The best level of glue spread of the plywood glued with 300 g/m2 phenol-formaldehyde.

Load bearing sandwich timber walls with plywood faces and bamboo core

Novel light timber sandwich panels (referred to as BCS panels herein) are manufactured by gluing plywood faces to bamboo core rings. The panels are tested in compression and in bonding shear (between bamboo and plywood). A finite element model is developed and validated against the experimental results, and is used to capture the responses of the BCS panels under axial and combined axial and bending actions. A lognormal distribution is used to represent the mechanical properties of plywood in the finite element analyses (FEA). Moreover, effect of different core configurations, face thickness, core layers and initial imperfection shapes on the axial compressive capacity of the panels are investigated. Where possible, results are compared against theoretical predictions. Current test results show that under axial compressive action, the ultimate capacity to weight ratio of the BCS panels are up to 27.3% higher than a conventional CLT panel of the same dimension. At large slenderness ratios, the proposed BCS panels have ultimate axial capacities close to the conventional CLT panels. Under combined axial and bending loading, the BCS panels outperform a CLT panel of similar size.

Caracterização tecnológica de painéis engenheirados produzidos com madeira de paricá

A demanda por produtos a base de madeira é crescente, principalmente a partir de florestas plantadas. Dessa forma é possível maximizar o aproveitamento da madeira e obter produtos com resistência e confiabilidade de utilização. Objetivou-se estudar as propriedades tecnológicas d compensado e do LVL (Laminated Veneer Lumber) produzidos com madeira de paricá (Schizolobium amazonicum Huber ex Ducke). Avaliou-se a absorção de água, densidade (básica e aparente), umidade, porosidade, inchamento em espessura e inchamento residual. Utilizou-se 30 corpos de prova de cada tipo de painel, os dados foram analisados por meio de estatística descritiva e pela matriz de correlação de Pearson. No compensado a densidade básica, densidade aparente e porosidade foram de 0,38 g cm-3, 0,44 g cm-3 e 75,47%, respetivamente. Ainda, a umidade elevou-se 20,91% entre 2 e 96 horas de imersão em água. O inchamento residual foi de 3,75% e o inchamento em espessura aumentou 0,81% entre 2 e 96 horas de imersão. No LVL, a densidade básica (0,41 g cm-3) e a densidade aparente (0,48 g cm-3) foram maiores em relação ao compensado e a porosidade foi menor. O inchamento residual (4,24%) e o aumento em inchamento em espessura (1,22%) foram maiores em relação ao compensado. Por apresentarem alta higroscopicidade, as aplicações dos painéis avaliados devem ser preferencialmente em ambientes sem contato com umidade.

The Effect of Veneer Densification Temperature and Wood Species on the Plywood Properties Made from Alternate Layers of Densified and Non-Densified Veneers

In this study the properties of plywood manufactured from densified and non-densified veneer sheets and alternate layers of such veneers with and without densification using low amount of adhesive as a function of densification temperature and wood species were investigated. The plywood panels were made from rotary-cut birch and black alder veneers using urea-formaldehyde (UF) adhesive. Veneer sheets with thickness of 1.5 mm were subjected to the thermal-compression at three different temperatures while keeping constant the pressure during a same time span. Five-layers plywood panels were produced using a constant hot-pressing schedule using different amounts of glue spread as a function of the plywood type; such as plywood made from non-densified (80 g/m2) and densified (60 g/m2) veneers only; and combination of them (70 g/m2). The bending strength (MOR) and the modulus of elasticity (MOE) along with the shear strength of the plywood samples for bonding class 1 (dry conditions) have been determined. As expected bending strength of the plywood samples increased with the increasing in density. The increase of veneer densification temperature resulted in a gradually decrease of MOR; MOE and shear strength values for the plywood panels made of densified veneers and mixed panels of both species. The temperature of 150 °C for veneer densification seemed to be enough to achieve enhanced bending and bonding properties. All plywood panels in this study were manufactured using reduced glue consumption and they presented satisfactory properties performance for indoor applications.

Effect of heat treatment on some physical and mechanical properties of birch plywood

The plywood consumption in various applications is increasing, especially in construction. In service, plywood can be exposed to a range of outdoor conditions, sometimes at elevated temperatures. This requires an understanding of the structural behavior and knowledge of the effects of the elevated temperatures on the properties of plywood. Therefore, the objective of this research was to study the effect of exposure time on physical and mechanical properties of plywood at elevated temperatures. The plywood samples were tested after exposure to nine different temperatures (50 °C, 75 °C, 100 °C, 125 °C, 150 °C, 175 °C, 200 °C, 225 °C and 250 °C) and ten exposure time levels (0.5, 1, 1.5, 2, 2.5, 3, 6, 8, 10 and 12 h) at each temperature. Additionally, a set of control samples was tested at room temperature. The findings of this study indicated that exposure of plywood panels to elevated temperature caused significant degradation of their bending and bonding strengths, whereas the hydrophobicity of the panels improved. Three stages of plywood degradation could be distinguished. Below 175 °C, there is a slow decline in strength; the decisive change already occurs at 175 °C; but as temperature increases beyond 175 °C, a rapid decrease in strength is observed. Plywood samples lost 98.1% of their initial strength after 1.5 h of exposure at 250 °C, and lost 98.5% after 6 h of exposure at a temperature of 225 °C. Statistical regression-based models were also developed and evaluated for predicting the strength loss of plywood panels as a function of weight loss. As the weight losses of panels increased, the losses in bending and bonding strength increased too. The decrease in bending and bonding strength only becomes significant when the weight loss exceeds 5%. When the weight losses increased above 15%, plywood samples almost lost their strength.

Effect of Different Hardwood Species and Lay-Up Schemes on the Mechanical Properties of Plywood

In Estonia, hardwoods form approximately 50% of all forest area, where the main species are birch (30%), gray alder (9%), aspen (6%) and black alder (4%). Birch has been extensively used by the veneer-based industry, but species like black alder, gray alder and aspen have not been commonly used by the veneer-based products industry due to the lower quality of this resource. The aim of this research is to determine the effect of different lay-up schemes and usages of gray alder, black alder and aspen on the mechanical properties of plywood, by replacing birch veneer in the plywood core with alternative wood species. The main veneer and plywood characteristics will be evaluated according to the current standards, e.g., veneer strength perpendicular to grain, plywood bonding and bending strength, and modulus of elasticity. All processing parameters will be kept similar to those used generally by birch plywood manufacturers. The results showed that birch and black alder plywood panels had generally the highest bending strength properties, followed by grey alder and aspen. It was also found that, for proper gluing, birch veneers had the lowest glue consumption, 152 g/m2, and aspen had the highest glue consumption, 179 g/m2. It was found that when lower density wood was used in the plywood, the product density increased. Low density wood veneers had higher glue consumption, and also higher compaction in thickness than birch veneers under the same pressure. Overall, it was shown that the wood species used in this study have slightly lower strength properties, but with proper lay-up schemes, these wood species could be successfully used by the veneer-based products industry.

Effect of vacuum hot pressing on the bonding quality and heat transfer performance of plywood

Vacuum technology was applied to the hot-pressing technology of plywood production with phenolic resin (PF). For plywood with the same number of layers, veneers were hot-pressed with conventional and vacuum hot-pressing processes respectively at the same hot-pressing time. Varying layers (3, 9 and 15-layers) and spread quantities (220 g m−2, 260 g m−2, 300 g m−2) were applied. Heat transfer performance of the assembly, polymerization extent of PF, and bonding quality of plywood were examined by thermocouple and humidity sensors, Fourier transform infrared spectroscopy (FTIR), fluorescence microscope and bonding strength measurement. The results indicated that, compared to conventional hot pressing, the temperature of the central layer of the assembly vacuum hot-pressed was significantly increased by about 20–30 °C and the adhesive cured more quickly. The hot-pressing method had a significant influence on the bonding strength of plywood, with an enhancement of the bonding strength to wood failure ratio of 48.37% and 33.55%, respectively. The adhesive between adjacent laminates formed a continuously dense layer with more connection points, leading to excellent mechanical meshing and high bonding quality. In addition, vacuum hot pressing can eliminate the influence of adhesive position on bonding strength and make the mechanical properties of plywood tend to be uniform in thickness direction. Under the experimental conditions, the variable energy cost of 15-ply plywood with 1 m3 produced by vacuum hot pressing was 3.83% less than that of conventional hot pressing, and the plywood could still maintain good bonding strength at low spread quantity.

ИССЛЕДОВАНИЕ ВЛИЯНИЯ СТАБИЛИЗАТОРОВ НА СВОЙСТВА КАРБАМИДОФОРМАЛЬДЕГИДНОГО СВЯЗУЮЩЕГО И ФАНЕРЫ ФК

The problem of stabilizing the properties of the urea-formaldehyde binder during storage is relevant for both glued products and resins. Changing the performance of the resin during storage makes it difficult to apply a binder and leads to a deterioration in the physical and mechanical properties of plywood. The effect of glycerol, mono- and triethanolamine, as well as a mixture of glycerol and monoethanolamine on the nominal viscosity of the resin after 56 days of storage, has been studied. The use of glycerol and monoethanolamine (including in the complex) reduces the nominal viscosity of the resin by 13.5-24.8%. The use of triethanolamine as a stabilizer makes it possible to reduce the nominal viscosity by 35% in comparison with the index of an unstabilized oligomer. Mechanical properties of FC plywood based on the stabilized and unstabilized binder has been studied. It was found that glycerol additive (or glycerol in combination with monoethanolamine) significantly reduces strength characteristics of plywood, which makes it irrational to use these stabilizers. The addition of 0.2% triethanolamine to CFS allows a 35% reduction in the nominal viscosity of the resin, while the cohesive strength of the binder decreases by 1.5%. The result is within the framework of the dispersion of the indicator, i.e. strength reduction is negligible. The static bending strength of plywood with a stabilized triethanolamine binder is more important than that of control specimens without the addition of stabilizers. The results of the study enable to recommend the addition of triethanolamine in an amount of 0.2% by weight of urea-formaldehyde resin as a rational stabilizer

Properties of Plywood Produced with Urea-Formaldehyde Adhesive Modified with Nanocellulose and Microcellulose

Urea-formaldehyde adhesives are widely used in the wood-based materials industry. The study investigates the possibility of using cellulosic particles as a filler that modifies the properties of the resin and consequently improves the properties of plywood. Moreover, the study also examines the differences between microcellulose and nanocellulose used as a filler for UF adhesive. Based on the investigations, it was found that the addition of MFC and NCC significantly affected the curing process and rheological behaviour of adhesive mixtures. Modification led to increase of viscosity and extension of a gel time caused by lowering solid content of the resin. The experimental and reference plywood were tested in terms of bonding quality and mechanical properties such as modulus of elasticity and modulus of rigidity in accordance with applicable standards. The results of the tests confirmed that both the amount and the type of modifier added to the resin had a significant effect on the properties of plywood. The bonding quality and the above mentioned mechanical properties improved in all variants of modification; however the most effective was the addition of NCC in the amount of 10 %/100 g of solid resin. The slight decrease of formaldehyde emission was only observed for 5 % cellulosic particles added to 100 g of solid UF.

Some properties of plywood produced from 10 cultivars of poplar

ABSTRACTThe aim of this paper is to study the possible influence of poplar cultivar and soil on the mechanical properties of plywood produced from 10 cultivars having grown in different soils. For each cultivar, two trees were harvested per station; crosscut into bolts then peeled 1.4 mm thick for one tree and 3 mm thick for the other one: in total, 80 trees were sampled. The veneers were used to make 160 boards using 2 adhesives: polyvinyl acetate (PVAc) and melamine-urea-formaldehyde (MUF). These boards were then cut into standardized samples for non-destructive and destructive mechanical tests. The properties of plywood were characterized by measuring their density, modulus of elasticity and modulus of rupture. The results showed that poplar plywood properties could be influenced by adhesive and veneer thickness. The cultivar and soil effects were never relevant. A tight correlation was found between destructive and non-destructive modulus of elasticity tests.

Thermophysical Characterization of an Insulating Bio-material Based on the Macerate of ''Néré'' (<i>Parkiabiglobosa</i>) Pods and Cow Dung

This work concerns the thermophysical characterization of a bio-eco-material made from cow dung and the macerate of nere pods. To achieve this, chemical tests based on tannin concentration determination of four different solutions of nere pods (60 g.l-1; 120 g.l-1; 180 g.l-1 and 240 g.l-1) were prepared at 100°C, then brought to the boil for 5 minutes. After three different maceration times (6 h; 24 h and 48 h), the analysis of the solutions obtained using a spectrometer made it possible to select the solutions of 120 g.l-1 and 180 g.l-1 which offer best tannin concentrations in 24 hours, necessary for making test pieces. Thermal tests based on thermal effusivity and thermal conductivity measurements were then carried out in transient mode, with hot strip method. In order to compare the thermal performance of developed eco-material with that of ordinary insulators, the thermophysical properties of plywood and plaster were also measured. The results obtained showed that for the two dosages of 120 g.l-1 and 180 g.l-1, the thermal effusivity of eco-insulator varies from 247.732 J.K-1.m-2.s-0,5 to 270.732 J.K-1.m-2.s-0,5 respectively and the thermal conductivity from 0.082 W.m-1.K-1 to 0.080 W.m-1.K-1. For the same dosages, the thermal diffusivity varies from 1.106.10-7 m².s-¹ to 0.881.10-7 m².s-¹ respectively. A comparative study has shown that the eco-material developed and tested offers better insulating power due to its relatively weak thermophysical properties compared to ordinary insulating materials, namely plaster and plywood.