Table 4.

Physical-mechanical performance of thermal-insulation mattresses produced using recycled textile and PET waste and natural fibres of plant and animal origin.

Identification Code		P1	P2	P3	P4	P5	P6
Heat transfer coefficient at full thickness (W/mK)		0.0362	0.0358	0.0421	0.0377	0.0412	0.0336
Heat transfer coefficient at 1/2 of thickness (W/mK)		0.0306	0.0308	0.0338	0.0325	0.0337	0.0303
Heat transfer resistance at full thickness (mK/W2)		0.55	0.84	1.19	1.33	1.46	0.89
Heat transfer resistance at 1/2 of thickness (mK/W2)		0.33	0.49	0.74	0.77	0.89	0.50
Compressive strength (kPa)		0.17	0.18	0.14	0.20	0.10	0.11
Tensile strength (N/mm2)	longitudinal direction	0.05	0.11	0.06	0.06	0.04	0.13
	transverse direction	0.03	0.11	0.05	0.08	0.05	0.19
Elongation at break (%)	longitudinal direction	47.60	34.02	34.03	26.62	35.27	22.86
	transverse direction	43.45	37.71	28.64	38.26	31.82	31.24
Short-term water absorption (kg/m2)		0.069	0.223	0.132	0.121	0.387	0.350
Water vapour resistance (m∙h∙Pa/mg2)		0.06	0.06	0.09	0.11	0.09	0.08
Water vapour resistance factor, µ		1.35	1.41	1.26	1.61	0.95	2.32