Investigation of thermal and solar properties of perlite coated woven fabrics

Abstract

In this study, thermal insulation and solar properties of polyester woven fabrics which were coated with micronized perlite having three different particle sizes (10–38, 50–63, and 100–150 μm) at four different concentrations (20, 40, 60, and 80 g/kg) were investigated. The coating process was performed according to the knife‐over‐roll method. Thermal measurements were carried out with two different principles to evaluate contact and radiant heat transfer according to JIS R 2618 (testing method for thermal conductivity of insulating fire bricks by hot wire) and EN ISO 6942 (protective clothing‐protection against heat and fire‐method of test: evaluation of materials and material assemblies when exposed to a source of radiant heat), respectively. Perlite coating enhanced the thermal insulation property of fabrics. The lowest thermal conductivity coefficient and heat transmission factor (0.088 W/mK and 26.83%) values were obtained at the maximum concentration with the biggest size perlite. With the increasing perlite concentration, solar transmittance values decreased for all particle sizes while solar reflectance values increased.

“Sandwich” Structure (PLA/Thymol Fibre Membranes/SAP/Paper Fibre) Antibacterial Pad for Preservation of Chilled Mutton

“…The test results showed that both pads without added thymol and antimicrobial pads had good water absorption, with water absorption values of 0.136 ± 0.004 g/cm 2 and 0.142 ± 0.006 g/cm 2 , respectively, indicating that the addition of thymol does not affect the water absorption because it is the intermediate layer (SAP) that has the water absorption properties, and Özan, Kanik and Özer [44] demonstrated that the highly absorbent resins have good water absorption. Therefore, it is shown that the antimicrobial pads can absorb the drip loss of meat during storage and not only maintain the water absorbency of the original pads but also have antimicrobial properties.…”

Uses of Vermiculite and Perlite in Fire- Retardant Textile Applications

“…The chemical composition of perlite is approximately composed of 75% SiO 2 with oxides of (14.8%), K (4.8%), Na (2.9%), Ca (0.9%), Mg (0.1%), Fe 2 0 3 (1.5%) and bound water (3.0%). When perlite particles are heated rapidly to temperatures exceeding 870 °C (1600 °F), they expand to 4-20 times of their original volume [25]. The specific characteristics of the expanded perlite are the following: 50~250 (density, mg/cm 3 ), 0.03~0.05 (thermal conductivity, W/ (m•K)), and -200~800 (service temperature, °C) [26].…”

Aerojellerle Isi Yalitimi Ve Teksti̇l Uygulamalari

“…Son yıllarda yaşanan enerji sıkıntıları ve fosil yakıtların neden olduğu çevresel sorunlar (karbon salınımının artması gibi) tüm dünyayı çeşitli arayışlara ve önlemler almaya yöneltmiştir. Bunlardan birisi de enerjiyi tasarruflu kullanmak amacıyla gerek üretimde ve gerekse yaşam alanlarında enerji kayıplarının en aza indirilmesi konusudur [1]. Isı kaybının en fazla olduğu alanın ise evsel ısınma ve endüstriyel ısı kayıplarından kaynaklandığı düşünülmektedir.…”