| 摘要 |
<p>Corrugating medium comprises two plies of relatively thin corrugating medium made of reclaim paper and stuck together face to face by an adhesive that incorporates a fibrous filler. The adhesive may be sodium silicate, gelatinized starch, or natural or synthetic resin. The fibrous filler may be wood, flour, sawdust, asbestos meal, glass floc or rayon floc, and may be applied as a dusting to an adhesive coating on one layer before the layers are stuck together. The product may be corrugated and faced on one or both sides. Specifications 532,004, 654,353 and 579,701 are referred to.</p> |
