An improved lightweight, multi-layer, reflective swimming pool cover containing two thermoplastic layers. The top layer has a dark-colored polyethylene film and the lower layer has a polyethylene film with a aluminum concentrate, or other suitable reflecting material, deposited thereon along the entire layer, thereby becoming a reflective surface. The layers are suitably bonded together to form a water and air tight seal so as to provide the cover with a reflective surface on which are integral reflective solar heating and insulative pockets configured in a predetermined spatial relationship to each other. The cover acts to continually reflect radiating heat back into the pool and provides an effective and enhanced insulation barrier against radiant heat loss from the pool.
A heat retaining swimming pool cover (1) is floatable on pool water (2) in a swimming pool (3) and has a plastic upper film (5) for facing toward the atmosphere (6), a plastic lower film (8) for facing toward the pool water (2), sufficient spaced apart air pockets (10) configured into the lower film (8) for containing air such that the cover (1) is floatable on the pool water (2), and sealed land areas (11) between the air pockets (10) such that the upper and lower films (5,8) are sealed to each other. The lower film (8) contains an infrared absorbent effective amount of an infrared absorbent but which amount is insufficient to prevent sunlight (14) from substantially penetrating the lower film (8) and passing into the pool water (2).
A heat retaining swimming pool cover (1) is floatable on pool water (2) in a swimming pool (3) and has a plastic upper film (5) for facing toward the atmosphere (6), a plastic lower film (8) for facing toward the pool water (2), sufficient spaced apart air pockets (10) configured into the lower film (8) for containing air such that the cover (1) is floatable on the pool water (2), and sealed land areas (11) between the air pockets (10) such that the upper and lower films (5,8) are sealed to each other. The lower film (8) contains an infrared absorbent effective amount of an infrared absorbent but which amount is insufficient to prevent sunlight (14) from substantially penetrating the lower film (8) and passing into the pool water (2).
