Bonding Of Fiber Reinforced Plastics - Diamond DA20-C1 Maintenance Manual

DA20-C1 AMM
10.

Bonding of Fiber Reinforced Plastics

A. Introduction
The following steps establish the procedure for the bonding of precured fiber reinforced plastic
parts.
B. Materials
Resin
Resin Filler/Thickner
(1) Scotchlite K20 (.19g/cc)
(2) AerosilFillerStochem
(3) Cotton flocksCotton fibersQuarray Hill
C. Procedure
Preparation of Bonding Paste
Bonding pastes are used primarily for adhesive bonding of precured fiberglass parts. Bonding
paste or thickened resin is a mixture of three types of fillers and mixed resins.
Refer to the table below.
The following combination of thickening fillers shall be used for preparation of bonding paste:
microballoons + aerosil: maximum 7% by weight
Cotton Fibers: minimum 7% by weight
Quantity of microballoons and aerosil may be varied to change paste consistency.
The total mix of fillers must not exceed 20% by volume.
Refer to the table below for the recommended mixture.
Material
Mixed Resin
Cotton Flocks
Aerosil
Microballoons
Joining of Precured Parts
DA201-C1
Rev 21
Microballoons
50 100 150
5 10 15
1.5 3 4.5
2 4 6
51-00-00
Standard Practices - Structures
3M
Weight in Grams
200 250 300
20 25 30
6 7.5 9
8 10 12
350 400 450
35 40 45
10.5 12 13.5
14 16 18
Page 11
14 Jan 13