laajennusaineisiin
Laajennusaineisiin (plural form of laajennusaine) are substances that expand when exposed to heat, moisture, or chemical reaction. They are used in a variety of industries to provide sealing, insulation, or structural support. Commonly encountered in construction, these materials act as expansion joints, foam insulation, or pipe sealants to accommodate thermal movement and maintain airtightness.
The composition of laajennusaineisiin varies, but typical formulations include polyurethane, polyisocyanurate, and extruded polystyrene. Some expandable
Applications include filling voids in walls, floors, and ceilings for moisture barriers; creating acoustic panels with
Regulations governing laajennusaineisiin focus on flammability, environmental impact, and toxicity. Standards such as EN 794 (related
Ongoing research seeks to improve the sustainability of laajennusaineisiin by incorporating bio‑based polymers and recycled plastics.