Rigid Polyurethane Foam Thermal Insulation Protected with Mineral Intumescent Mat

• Autorzy: Kirpluks M. , Cabulis U. , Zeltins V. , Stiebra L. , Avots A.

Identyfikatory

DOI

10.2478/aut-2014-0026

• Języki publikacji: EN

Abstrakty

EN

One of the biggest disadvantages of rigid polyurethane (PU) foams is its low thermal resistance, high flammability and high smoke production. Greatest advantage of this thermal insulation material is its low thermal conductivity (λ), which at 18-28 mW/(m•K) is superior to other materials. To lower the flammability of PU foams, different flame retardants (FR) are used. Usually, industrially viable are halogenated liquid FRs but recent trends in EU regulations show that they are not desirable any more. Main concern is toxicity of smoke and health hazard form volatiles in PU foam materials. Development of intumescent passive fire protection for foam materials would answer problems with flammability without using halogenated FRs. It is possible to add expandable graphite (EG) into PU foam structure but this increases the thermal conductivity greatly. Thus, the main advantage of PU foam is lost. To decrease the flammability of PU foams, three different contents 3%; 9% and 15% of EG were added to PU foam formulation. Sample with 15% of EG increased λ of PU foam from 24.0 to 30.0 mW/(m•K). This paper describes the study where PU foam developed from renewable resources is protected with thermally expandable intumescent mat from Technical Fibre Products Ltd. (TFP) as an alternative to EG added into PU material. TFP produces range of mineral fibre mats with EG that produce passive fire barrier. Two type mats were used to develop sandwich-type PU foams. Also, synergy effect of non-halogenated FR, dimethyl propyl phosphate and EG was studied. Flammability of developed materials was assessed using Cone Calorimeter equipment. Density, thermal conductivity, compression strength and modulus of elasticity were tested for developed PU foams. PU foam morphology was assessed from scanning electron microscopy images.

Słowa kluczowe

EN

polyurethane foam; intumescent textile; flammability; thermal conductivity; sustainable materials

PL

pianka poliuretanowa; materiały ochronne; palność; przewodnictwo cieplne; materiały trwałe

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2014
• Tom: Vol. 14, no. 4
• Strony: 259--269
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Kirpluks M.

• Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, Latvia LV-1006, [phone]

autor

Cabulis U.

• Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, Latvia LV-1006, [phone]

autor

Zeltins V.

• Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, Latvia LV-1006, [phone]

autor

Stiebra L.

• Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, Latvia LV-1006, [phone]

autor

Avots A.

• Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, Latvia LV-1006, [phone]

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