SAMPE Journal - July/August 2016 - 29

Feature Article

Figure 1. Ingersoll Mongoose Machine
located in Palmdale, CA.

and vacuum-only cure conditions are all that is
needed to process low void content laminates.
Achieving net thickness tape material requires
the impregnation process be conducted at higher
than typical temperatures and may also require
adjustments in the path of the material within the
prepreg line. The desired result is a prepreg level of
impregnation which exhibits no or low voids within
the prepreg (less than 1%) in contrast to autoclave
grade prepreg which typically has 6% to 10% voids
or the hand lay-up tape which contains more than
20% voids.

limiting than with the hand laid product form. Early
AFP trials on IM7/MTM®45-1 demonstrated tack
levels drop to unacceptable levels after only 10
days above -18°C. Because the degradation of tack
begins after eight days, Lockheed Martin restricts
the working life of MTM®45-1 slit tape to only eight

Unique Polyamide
High Modulus and Strength
Easy Molding
Water Resistance
Good Surface Appearance

Consolidating-on-the-Fly
When net thickness tape is fiber placed at high
temperatures and pressures, the result is a highly
consolidated laminate relying on the oven cure
to polymerize the matrix without the need for
significant resin flow. Net thickness tape assures
porosity is minimized within the prepreg tows,
and AFP processing at high temperatures and
compaction forces minimizes the porosity between
the tows. Using the AFP machine to "consolidateon-the-fly" ideally requires nip temperatures
approaching the minimum viscosity of the resin.
For MTM®45-1, the desired nip temperature for
the formation of the highest quality panels is the
resin viscosity/tack achieved at temperatures in the
90°C to 120°C range.

*
*
*
*

Prepreg Outlife
OoA prepregs, like MTM®45-1, are also challenged
with restrictive outlife properties1. Because the AFP
process is sensitive to the tack level of the slit tape
material these outlife restrictions may be more

MITSUBISHI GAS CHEMICAL AMERICA

SAMPE Journal, Volume 52, No. 4, July/August 2016

www.mgc-a.com
composite@mgc-a.com

29


http://www.mgc-a.com

Table of Contents for the Digital Edition of SAMPE Journal - July/August 2016

Contents
SAMPE Journal - July/August 2016 - Cover1
SAMPE Journal - July/August 2016 - Cover2
SAMPE Journal - July/August 2016 - Contents
SAMPE Journal - July/August 2016 - 2
SAMPE Journal - July/August 2016 - 3
SAMPE Journal - July/August 2016 - 4
SAMPE Journal - July/August 2016 - 5
SAMPE Journal - July/August 2016 - 6
SAMPE Journal - July/August 2016 - 7
SAMPE Journal - July/August 2016 - 8
SAMPE Journal - July/August 2016 - 9
SAMPE Journal - July/August 2016 - 10
SAMPE Journal - July/August 2016 - 11
SAMPE Journal - July/August 2016 - 12
SAMPE Journal - July/August 2016 - 13
SAMPE Journal - July/August 2016 - 14
SAMPE Journal - July/August 2016 - 15
SAMPE Journal - July/August 2016 - 16
SAMPE Journal - July/August 2016 - 17
SAMPE Journal - July/August 2016 - 18
SAMPE Journal - July/August 2016 - 19
SAMPE Journal - July/August 2016 - 20
SAMPE Journal - July/August 2016 - 21
SAMPE Journal - July/August 2016 - 22
SAMPE Journal - July/August 2016 - 23
SAMPE Journal - July/August 2016 - 24
SAMPE Journal - July/August 2016 - 25
SAMPE Journal - July/August 2016 - 26
SAMPE Journal - July/August 2016 - 27
SAMPE Journal - July/August 2016 - 28
SAMPE Journal - July/August 2016 - 29
SAMPE Journal - July/August 2016 - 30
SAMPE Journal - July/August 2016 - 31
SAMPE Journal - July/August 2016 - 32
SAMPE Journal - July/August 2016 - 33
SAMPE Journal - July/August 2016 - 34
SAMPE Journal - July/August 2016 - 35
SAMPE Journal - July/August 2016 - 36
SAMPE Journal - July/August 2016 - 37
SAMPE Journal - July/August 2016 - 38
SAMPE Journal - July/August 2016 - 39
SAMPE Journal - July/August 2016 - 40
SAMPE Journal - July/August 2016 - 41
SAMPE Journal - July/August 2016 - 42
SAMPE Journal - July/August 2016 - 43
SAMPE Journal - July/August 2016 - 44
SAMPE Journal - July/August 2016 - 45
SAMPE Journal - July/August 2016 - 46
SAMPE Journal - July/August 2016 - 47
SAMPE Journal - July/August 2016 - 48
SAMPE Journal - July/August 2016 - 49
SAMPE Journal - July/August 2016 - 50
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SAMPE Journal - July/August 2016 - 72
SAMPE Journal - July/August 2016 - Cover3
SAMPE Journal - July/August 2016 - Cover4
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