(19) |
 |
|
(11) |
EP 0 073 313 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
|
28.03.1984 Bulletin 1984/13 |
(43) |
Date of publication A2: |
|
09.03.1983 Bulletin 1983/10 |
(22) |
Date of filing: 25.06.1982 |
|
|
(84) |
Designated Contracting States: |
|
AT CH DE FR GB IT LI SE |
(30) |
Priority: |
31.08.1981 US 297538
|
(71) |
Applicant: NORTON COMPANY |
|
() |
|
(72) |
Inventor: |
|
- Darjee, Dhiraj Harlbhaj
()
|
|
|
|
(54) |
A stitch bonded fabrics for reinforcing coated abrasive backings |
(57) Stitch bonded fabrics were found to be suitable substrates for coated abrasives when
the fabric has a strength in the warp direction of at least 30 dekanewtons (daN) per
centimeter (cm) of width, a fill yarn cover factor of at least 40%, and stitch yarns
with a tensile strength of at least 0.5 daN. For substitution of the established commercial
classes of abrasives known as X and Y weights, the fabrics are preferably made on
a Malimo machine, with 14-22 warp yarns of 840-1300 denier high tenacity multifilament
polyester or glass per 25 cm of fabric width, at least 64 fill yarns of staple or
texturized multifilament polyester per 25 cm of fabric length, and stitch yarns of
70-140 denier high tenacity multifilament polyester.