GM 2719M-1998 缝纫线.pdf

GENERAL MOTORS ENGINEERING STANDARDS
Materials and Processes- Textlles
SEWING THREADS
GM2719M
1 SCOPE This specifcation es a m l si 3.2 En AATM D225 Opion A). The eonga on
able for sewing automotive seat cushions and backs, seat belt of the specimen is determined during the tensile test(at break
applications. The thread must be free from all full-ply knots when measured nip to nip of the clamps 255 1.5 mm. An in
and manufactured from synthetic fibers, twisted, dyed and fin
ial tension shall be
appli
lied to the specimen sufficient to
ished in order to meet the requirements
remove any slack but not enough to stretch the thread more
than 0.1%0
2 REFERENCED STANDARDS
3.2.3 Minimum Yield (ASTM D204).
GM502M
GM9225P
ASTM D2256
GM1000M
AATCC8
SAE J1885
3.2.4 Twist(ASTM D1423).
GM9128P
AAITCC 0
SAB J1960
GM9137P
STM D204
SAE J2212
3.2.4.1 Apparatus: Suter's Twist Tester, or equivalent.
GM9220P
ASTM D1423
3. 2. 4.2 Tension: 30 g applied through the nonrotating clamp.
3 REQUIREMENTS. Unless otherwise specified, the 3.2.4.3 Distance between clamps: 255t 1.5 mm.
material shall be tested under standard conditions. 21+2C
and 50 +5% RH. The thread shall also conform to those 3.2.4.4 Number of tests: 5 samples minimum taken at least 9
requirements shown in Table 1 of this specification. All thread m apart
must represent production quality material
NOTE: Draw the thread from the side of the package( without
3.1 DESIGN
putting any load on it)instead of over the end.
3.1.1 Restricted and Reportable Chemicals(GM100M
3.3 FINSH(GM9225P)
All material supplied to this specification must comply with
the requirements listed in GM100OM Restricted and 3.3.1 Lubricant, between 4 and 9% by weit, is required for
Reportable Chemicals
all constructions
3.1.2 Recycling Guidelines(GM5 2M). Materials developed 3.3.2 The lubricant between 7 and 12%o by weight is required
to this specification shall be optimized to provide maximum
unbonded polyester constructions (42276x69 and
end-of-life cycle value utilizing the Recyclability Checklist and
32276x92)
reported to the approving and procuring Material Engineering 3.3.3 Refer to Table 1 to determine when resin bonding is
Reference the GM Recycling Design Guide, GM502M
3.4 COLOR MATCH(GM9220P). The color match shall be
3. 2 The following properties and values will be specified by approved by the extile releasing department to be an accept
and conform to those shown in the Specification Chart(see able match to the standard.
Table 1)
3.5 COLORFASTNESS TO LIGHT (SAE J1885 or SAE
Composition and Construction
J2212). Prior to exposing, wrap a single layer of thread
Fiber Content
around a piece of standard foundation board #21929(Avail
Base Denier
able from: Fibre Converters, 29200 Vassar Ave, Livonia, MI
48152)cut 67 x 140 mm. Continue to wrap the thread parallel
Twist Direction (ASTM D204
to the long dimension of the board until the width of the wrap
Bonded or Unbonded
is 50 mm. The prepared sample will be inserted into an SL or
In SL-3T specimen holder and clamped into place. No other
3.2.1 Tensile Strength(ASTM D2256, Option A). The tensile
frame is to be used
strength