Performance of Thermal Insulation Material Produced from Lithuanian Sheep Wool

ABSTRACT

In the current paper, the thermal insulation material from the wool of sheep grown in Lithuania is analyzed. Three types of thermal insulation material were produced: horizontal orientations, corrugated from the individual layer obtained, and corrugated from individual mats. The 50 mm thick products were prepared and their main performance characteristics were evaluated: thickness changes, thermal conductivity, tensile strength, short-term water absorption, and flammability. Changes in the thickness of the materials were determined under different loads, and dependences on the density of the material were obtained. Thermal conductivity was measured for products of different densities, evaluated separately for horizontal orientation and corrugated products, and density dependences were obtained. Tensile strength was determined along and across the direction of formation for relatively different types of products. For all types of products, the short-term water absorption of the specimens was determined by partial immersion in water, and the results were compared. During the flammability tests, the flame propagation time on the specimen surface and the fact of incineration after removal of the flame source were determined for all types of specimens.

摘要

本文分析了立陶宛绵羊羊毛的隔热材料. 生产了三种类型的隔热材料: 水平定向、由获得的单个层制成的波纹状和由单个垫制成的波纹形. 制备了50 mm厚的产品，并对其主要性能特征进行了评估: 厚度变化、热导率、拉伸强度、短期吸水率和可燃性. 测定了在不同载荷下材料厚度的变化，并获得了材料密度的依赖性. 测量了不同密度产品的热导率，分别对水平取向和波纹产品进行了评估，并获得了密度依赖性. 对于相对不同类型的产品，沿形成方向和横跨形成方向测定拉伸强度. 对于所有类型的产品，通过部分浸入水中来测定试样的短期吸水率，并对结果进行比较. 在可燃性试验过程中，确定了所有类型试样在试样表面的火焰传播时间以及去除火源后的焚烧事实.

KEYWORDS:

• Sheep wool
• thermal insulation
• oriented fiber products
• corrugated products
• changes in thickness
• performance characteristics

关键词:

• 羊毛
• 隔热
• 定向纤维产品
• 瓦楞产品
• 厚度的变化
• 性能特征

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The datasets generated during and analyzed during the current study are available from the corresponding author, [Sigitas Vėjelis], on reasonable request.

Ethical approval

Every author listed on a journal article have made a significant contribution to the work reported.

Citation sources are clearly indicated in the work when quoting the works of other authors.

All data presented in the work are correct.

There are no competing interests.

An article is submitted only to this journal at a time.

All authors read and approved the final manuscript.

Additional information

Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.