| 摘要 |
PCT No. PCT/GB91/00907 Sec. 371 Date Dec. 18, 1992 Sec. 102(e) Date Dec. 18, 1992 PCT Filed Jun. 6, 1991 PCT Pub. No. WO91/19443 PCT Pub. Date Dec. 26, 1991.A protective cover for upholstered or padded articles such as bedding is made from a microporous ultrafilter material having a pore size of less than 0.0005 mm, to suppress passage of fecal particles produced by house dust mites. To prevent particles from bypassing the ultrafilter material, the seams of the cover are welded, and its opening is sealed by a resealable fastener, such as a zip-fastener, covered with an adhesive tape. |
