Scotch-Weld
Technical Data
™
Structural Plastic Adhesive
DP8005 Off-White • DP8005 Black
February, 2016
Product Description
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005 is a two-part acrylic-
based adhesive (10:1 ratio by volume) that can bond many low surface energy
plastics, including many grades of polypropylene, polyethylene, and TPO’s
without
special surface preparation.
3M™ Scotch-Weld Adhesive DP8005 can replace screws, rivets, plastic welding,
and two-step processes which include chemical etchants, priming or surface
treatments in many applications.
Features
•
Ability to Bond Dissimilar Substrates
•
Ability to Structurally Bond Polyolefins
•
Room Temperature Cure
•
Excellent Water and Humidity Resistance
•
Very Good Chemical Resistance
•
One Step Process - No Pre-Treatment of the Substrates Needed
•
Solvent-free Adhesive System
•
Convenient Hand-Held Applicator System
•
Contains 0.008” glass beads for bondline thickness control
•
Available in Bulk
3M
™
Scotch-Weld
™
Structural Plastic Adhesive
DP8005 Off-White • DP8005 Black
Typical Uncured
Physical Properties
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Product
3M™ Scotch-Weld™ Structural
Plastic Adhesive DP8005
Off-White
Color
Lbs./gal.
Viscosity (cPs.)
(1)
Base Resin
Mix Ratio (B:A)
Full Cure Time
@ 73°F (23°C)
Time to Handling Strength
(minimum of 50 psi shear at 73°F/23°C)
Work Life at 73°F (23°C)
Base (B)
Accelerator (A)
Base (B)
Accelerator (A)
Base (B)
Accelerator (A)
Base (B)
Accelerator (A)
By Volume
By Weight
Amber
White
8-8.4
8.75-9.15
17,000-30,000
35,000-55,000
Methacrylate
Amine
10:1
9.16:1
8-24 hrs.
2-3 hrs.
2.5-3 min.
Black
Black
White
8-8.4
8.75-9.15
15,000-30,000
35,000-55,000
Methacrylate
Amine
10:1
9.16:1
(1) Viscosity obtained by Brookfield, DV-II, #7 Spindle, 20 rpm at 75°F (24°C).
The accelerator formula is common to both Scotch-Weld Adhesive DP8005 Off-White and DP8005 Black
Typical Cured
Physical Properties
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Product
3M™ Scotch-Weld™ Structural
Plastic Adhesive DP8005
Off-White
Color
Shore D Hardness (ASTM D-2240)
Mechanical Properties
(2)
Strain at Peak Load
Stress at Peak Load (psi)
Modulus at 1% Strain (psi)
Tg onset (°C)
(3)
Coefficient of Thermal Expansion (ppm/°C)
(3)
Below Tg
Above Tg
Yellow
55
5.3%
1889
85,669
33
125
170
Black
Black
60
4.5%
1692
58,782
(2) Mechanical properties obtained using a Sintech 5GL Mechanical Tester. Approximate dimensions of the test
specimen was 1.5" x 0.5" x 0.3". Elongation was determined by crosshead displacement. The crosshead velocity
was 0.5"/min.
(3) Tg and CTE determined by TMA -40°F to 249°F (-40°C to 120°C) at 10°F (5°C)/min. (after 2 heat cycles).
-2-
3M
™
Scotch-Weld
™
Structural Plastic Adhesive
DP8005 Off-White • DP8005 Black
Typical Performance
Characteristics
Note: The following technical information and data should be considered representative or
typical only and should not be used for specification purposes.
Overlap Shear Strength
(4)
, tested @ 73°F (23°C)
Product
3M™ Scotch-Weld™ Structural
Plastic Adhesive DP8005
Off-White
Substrate
HDPE
PE
PP
UHMWPE
LDPE
ABS
Polycarbonate
Plexiglass (PMMA)
PVC
HIPS
Green FRP
PTFE
Polystyrene
Glass (3/16" thick)
Gel Coat (3/16" thick)
Copper (1/16" thick)
Aluminum (1/16" thick)
Cold-Rolled Steel (1/32" thick)
304 Stainless Steel (1/32" thick)
HDPE/HDG
HDPE/Galvanealed
HDPE/CRS (non-abraded CRS)
Oily HDG
SF = Substrate Failure/Break/Yield
CF = Cohesive Failure
AF = Adhesive Failure
MM = Mixed (Mode of AF and CF)
(4)
Overlap Shear Test Method: Overlap shear test for adhesion determined in accordance to ASTM D1002. Sampe dimenions
were 1" x 4" x 1/8" (unless other thicknesses indicated) with an overlap area of 1" x 1/2". Plastics and glass substrates were
cleansed with isopropyl alcohol (IPA) wipes; metal substrates were abraded with 150-grit sandpaper and cleansed with methyl
ethyl ketone (MEK) wipes. All bonds were allowed to cure for a minimum of 48 hours at 73°F (23°C) before tested. Data were
collected using a Sintech 5GL Mechanical Tester with the 2000-lb or 5000-lb load cells. Test rate was 2"/min. for plastic bonds,
and 0.1"/min. for metal and glass bonds at 73°F (23°C).
Black
OLS (psi)
1100 SF
875 SF
1150 SF
750 SF
400 SF
1575 SF
1100 AF
1075 SF
1900 SF
575 SF
2500 CF
200 AF
750 SF
525 SF
1425 SF
2050 CF
2075 CF
2275 CF
1100 AF
850 MM
1025 SF (HDPE)
1025 MM
1225 MM
OLS (psi)
1100 SF
1075 SF
1100 SF
750 SF
400 SF
1525 SF
850 SF
950 SF
2050 SF
550 SF
2475 CF
250 AF
775 SF
650 SF
1500 SF
2275 CF
2275 CF
2500 AF
2300 CF
975 SF (HDPE)
950 SF (HDPE)
950 SF (HDPE)
2150 CF
-3-
3M
™
Scotch-Weld
™
Structural Plastic Adhesive
DP8005 Off-White • DP8005 Black
Typical Performance
Characteristics
(continued)
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
T-Peel Strength
(5)
, tested @ 73°F (23°C)
Product
Substrate
HDPE
SF = Substrate Failure/Break/Yield
C sh = Cohesive but shocky
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005
Off-White
17 pli SF
Black
9 C sh
(5)
Peel tests on 0.02" thick HDPE, 0.017" bondline thickness, 8" x 1" in T-peel mode at a rate of 2.0"/min.
Environmental & Chemical Exposure Test on HDPE
(6)
All Exposure Times 14 Days Unless Otherwise Noted
All Temperatures are Room Temperature Unless Otherwise Noted
Product
3M™ Scotch-Weld™ Structural Plastic
Adhesive DP80005
Off-White
Black
Overlap Shear (psi)
1100 SF
950 MM
975 CF
1100 SF
925 CF
1075 SF
1100 SF
950 SF
1000 SF
325 CF
1050 SF
25 CF
100 CF
AF = Adhesive Failure
MM = Mixed (Mode of AF and CF)
Overlap Shear (psi)
1100 SF
950 MM
1000 SF
975 SF
925 CF
1025 SF
1000 SF
1000 SF
1025 SF
450 CF
950 SF
50 CF
200 CF
coupons of HDPE and subsequent testing in accordance with
footnote 4.
Condition
Control - no chemical exposure
160°F (71°C)/100% RH
160°F (71°C) Water Soak
Room Temperature Salt Water Soak (5% by wt.)
160°F (71°C)/100% RH Salt Water Soak (5% by wt.)
NaOH (10% by wt.)
HCl (16% by vol.)
Isopropyl Alcohol
Antifreeze Coolant
Gasoline
Diesel Fuel
Toluene
Acetone
SF = Substrate Failure/Break/Yield
CF = Cohesive Failure
(6)
Environmental tests were conducted by immersing bonded
OLS Bond Strengths at Elevated Temperatures
(7)
Product
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005
Test
Temperature
-20°F (-29°C)
73°F (23°C)
120°F (49°C)
150°F (66°C)
180°F (82°C)
Off-White
(HDPE)
750 CF
1100 SF
700 CF
500 CF
300 CF
Black
(HDPE)
875 CF
1100 SF
700 CF
475 MM
300 MM
Off-White
(Green-FRP)
975 AF
2475 AF
1875 MM
1150 MM
750 MM
Black
(Green-FRP)
900 AF
2450 AF
1550 MM
1025 MM
975 MM
OLS bond strength expressed in psi.
(7) Temperature resistance tests were conducted at specified
temperature in accordance with footnote 4.
-4-
3M
™
Scotch-Weld
™
Structural Plastic Adhesive
DP8005 Off-White • DP8005 Black
Temperature
Resistance
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005 Off-White:
Temperature Resistance / Overlap Shear Strength
2500
2250
2000
HDPE
Green FRP
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005 Black:
Temperature Resistance / Overlap Shear Strength
2500
2250
2000
HDPE
Green FRP
Overlap Shear (psi)
Overlap Shear (psi)
1750
1500
1250
1000
750
500
250
0
-20°F (-29°C)
73°F (23°C)
120°F (49°C)
150°F (66°C)
180°F (82°C)
1750
1500
1250
1000
750
500
250
0
-20°F (-29°C)
73°F (23°C)
120°F (49°C)
150°F (66°C)
180°F (82°C)
Temperature
Temperature
Typical Rate of
Strength Build-Up
(8)
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005:
Rate of Strength Build Up (HDPE Substrate)
1200
1100
3M™ Scotch-Weld™ Structural Plastic Adhesive DP8005 Off-White:
Rate of Strength Build Up
(8)
2500
2200
(CF)
2000
Overlap Shear (psi)
HDPE
Overlap Shear Strength (psi)
Green FRP
1527
(CF)
1000
900
800
700
600
500
400
300
200
100
?
0
?
"
#
%
'
?
&
1500
1015
(CF)
1000
646
(CF)
839
(CF)
921
(CF)
940
(SF)
500
0
0
0
0.5
1
2
14
20
80
85
3
702
(CF)
Off-White
Black
335
(CF)
4
5
6
7
8
24
0
10
20
30
40
50
60
70
Time in Hours
Bonding Time (Hr.)
(8)
Rate of strength testing done using overlap shear test described in footnote 4.
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