FOIL MASTER ROLLS FOR ADHESIVE TAPE FOIL
1. PURPOSE
To establish definitive quality standards on foil rolls, thereby
minimizing claims attributable to any lack of understanding between
supplier and customer.
2. OBJECTIVE
This specification covers 1235 or 8011 alloy foil master rolls for
adhesive tape foil and describes the quality attributes of the
master foil rolls.
3. PHYSICAL REQUIREMENTS
3.1 ALLOY AND TEMPER
Alloy and temper should correspond to Table 1.
Table 1
3.2 MECHANICAL PROPERTIES
Mechanical properties should correspond to Table 2.
Table 2
| Alloy | Temper | Gauge,mm | Tensile Strength Mpa | Elongation,% |
| 8011 | O | 0.010-0.050 | ≥55 | ≥2.0 |
3.4 CHEMICAL COMPOSITION
The chemical composition should correspond to Table 4. ( Unit: % )
Table 4
| Alloy | Si | Fe | Cu | Mn | Mg | Zn | Ti | Remark | Others | Al |
| Single | Total up |
| 1235 | 0.12～0.16 | 0.45～0.52 | 0.02 | 0.01 | 0.01 | 0.01 | 0.02 | Fe/Si=2.5～4 | 0.03 | | ＞99.35 |
| 8011 | 0.30~1.1 | 0.40~1.0 | 0.10 | 0.10 | 0.05 | 0.10 | 0.08 | | 0.05 | 0.15 | Remainder |
3.5 SURFACE CONDITION
3.5.1 The surface shall be cleaned and free from inclusions,
scratches, wrinkles, cracks, overlapping or other internal defects.
3.5.2 Pin-holes
The pin-holes should correspond to Table 5.
Table 5
| Gauge mm | 0.0065 | 0.007 | 0.007～0.0075 | 0.009 | >0.009～0.011 | >0.011～0.015 | >0.015～0.020 | >0.020～0.050 |
| Pinholes/m2 | ≤1000 | ≤800 | ≤600 | ≤500 | ≤200 | ≤100 | ≤50 | ≤30 |
| Note: When the customer has special requirement, it has to be
negotiated with supplier and demander. |
3.5.3 Spices
The splices are as below Table 6.
Table 6
| Roll Diameter,mm | Splices |
| ≤400 | ≤1 |
| ＞400 | ≤2 |
a) All splices to be ultrasonic/tape.
b) It is allowed one splice per roll. (Max. once per 2000m)
c) Marked at the roll edge with a film, placed close to the splice.
3.5.4 Wettability
The wettability corresponds to A grade quality.
