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Subject:
From:
"Frank K. Frimpong" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 27 Aug 1998 08:26:35 +0000
Content-Type:
text/plain
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text/plain (130 lines)
Hi Clive,
here are some properties of the different glass fabrics. It is not perfect
but I hope this throws a little bit more light your way

|--------+--------+--------+--------+--------+--------+--------+--------|
|Fabric  |CTE     |Softenin|S.G     |Refracti|Dk@ 1MHz|Df @1MHz|Youngs  |
|type    |        |g point |        |ve index|        |        |Modulus |
|        |        |        |        |        |        |        |Gpa     |
|        |        |        |        |        |        |        |(lb/in  |
|        |        |        |        |        |        |        |(supersc|
|        |        |        |        |        |        |        |ript: 2)|
|        |        |        |        |        |        |        |X10     |
|        |        |        |        |        |        |        |(supersc|
|        |        |        |        |        |        |        |ript: 6)|
|--------+--------+--------+--------+--------+--------+--------+--------|
|E       |60      |845     |2.605   |1.552   |6.6     |0.002   |74      |
|        |        |        |        |        |        |        |(10.5)  |
|--------+--------+--------+--------+--------+--------+--------+--------|
|C       |72      |750     |2.540   |1.541   |6.3     |0.005   |70(10.0)|
|--------+--------+--------+--------+--------+--------+--------+--------|
|S       |34      |968     |2.510   |1.529   |4.6     |0.002   |88(12.5)|
|--------+--------+--------+--------+--------+--------+--------+--------|


(Data extracted from "Glass Engineering Handbook" 3rd edition by McLellan &
                         Shand, Pub. McGraw Hill)


'E'  Glass  _  Used  for  electrical  applications,  the most commonly used
composition  for  continuous filament yarns. Good resistance to water, fair
to alkalies , poor resistance to acids.
E-glass  has  been  the  leader  of  the composites industry since the late
1940s.   was developed originally for use as an insulator in the Electrical
industry
(hence the "E" designation before the word glass)

'C'  Glass_  Chemically resistant glass, primarily to water and acids. Used
for battery separator mats, acid filter cloths and anode bags.


'S'   Glass_   High   tensile   strength,  high  modulus  glass  for  resin
reinforcement , particularly used for ballistic absorption shields.

S-glass  is  a  different  chemical  formulation  of  glass  that  enhances
Structural strength characteristics (so the "S" designation before the word
glass).
S-glass's  major  advantages  over E-glass include slightly higher strength
and  stiffness  on  a  per-weight  basis,  and it will also stretch further
before breaking.











Clive Ffitch <[log in to unmask]> on 26/08/98 19:07:53

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to [log in to unmask]



 To:      [log in to unmask]

 cc:      (bcc: Frank Frimpong/HQ/CUK/Celestica)



 Subject: [TN] DES: "S-glass" Fibre Reinforcement







     Hi All,

     Does anyone out there have any information or specification details on
     "S-glass" fibre reinforcement material as used in PCB laminates, and
     what does the "S" stand for?

     There are TCE (sorry CTE for you guys!) advantages with its use, and
     depending on the resin system it is used with, Er advantages also, but
     I am looking specifically to identify and understand the differences
     between "S-glass" fibre material and the more conventional "E-glass"
     fibre material. (I understand "E" stands for "Electronics" Grade???).

     How many people use S-glass?

     What benefits do you see?

     Any comments appreciated.

     Clive ffitch
     Matra BAe Dynamics UK
     Stevenage, England
     E-mail [log in to unmask]

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