| 摘要 |
<p>The present invention relates to mattress or furniture insulator pads that are placed between the coil springs and the cushioning material in mattresses or furniture, such as chair seats. Such insulator pads prevent the springs from piercing the furniture cushion and provide a bridge across the springs to more evenly distribute weight over the springs. The insulator pads according to the invention have three layers formed by sandwiching polyurethane foam between stiffening layers, preferably formed from polypropylene openmesh netting. Most preferably, a five layer insulator pad has the polyurethane foam sandwiched between stiffening layers and also has thin outer layers of polyurethane foam, applied adjacent to the stiffening layers, forming the top and bottom surfaces of the pad. Such thin outer layer foam sheets provide friction characteristics that retard relative movement between the cushion and the springs. The invention further relates to a method of making a laminated product, such as an insulator pad comprised of foam and stiffening layers held together with adhesive, in which a thin protective barrier foam sheet is placed between the surface of the compression roller and the sheets to be laminated together. The thin protective barrier foam sheet may or may not form the outer layer of the laminate product and prevents adhesive and foam material from contaminating the surface of the roller.</p> |
