3M 4955

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Description for 3M 4955

• White, closed-cell acrylic foam carrier • used on high surface energy plastic substrates • Apply as low as 50°F (10°C)

*See Terms of Use Below

Application Type	Bond
1 Part or 2 Part	1 Part
Material Form	Tape
Substrate	Acrylic, Aluminum, Cermaic, Glass, Metal, ABS, Polycarbonate, Rigid PVC, Enameled Steel, Stainless Steel, Galvanized Steel, Epoxy, Galvanized Steel, PBT, Plastic, Steel
Manufacturer	3M
Chemistry	Acrylic
Cure Method	Pressure sensitive
Color	White
Relative Solvent Resistance	Chemical Resistance: Excellent solvent resistance
High Temperature Resistance (°C)	204, 149, 110, 90, 75
Low Temperature Resistance (°C)	-35
Density (g/cm³)	0.720
Key Specifications	UL 746C

Best Practices for 3M 4955

*See Terms of Use Below

Surface Preparation

Most substrates are best prepared by cleaning with a 50:50 mixture of isopropyl alcohol (IPA*) and water prior to applying 3M™ VHB™ Tapes.

See Vendor Technical Data Sheet for more info.

To obtain good performance with all 3M™ VHB™ Tapes, it is important to ensure that the surfaces are dry and free of condensed moisture.
Application

Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Firm application pressure develops better adhesive contact and helps improve bond strength. Typically, good surface contact can be attained by applying enough pressure to insure that the tape experiences approximately 15 psi (100 kPa) pressure. Either roller or platen pressure can be used. Note that rigid surfaces may require 2 or 3 times that much pressure to make the tape experience 15 psi.

Ideal application temperature range is 70°F to 100°F (21°C to 38°C). Pressure sensitive adhesives use viscous flow to achieve substrate contact area. Minimum suggested application temperatures:50°F (10°C): 3M™ VHB™ Tapes 4950, 5952, 4910, 4952, 4611, 4622 families.

Note: Initial tape application to surfaces at temperatures below these suggested minimums is not recommended because the adhesive becomes too firm to adhere readily. However, once properly applied, low temperature holding is generally satisfactory.
Curing

After application, the bond strength will increase as the adhesive flows onto the surface (also referred to as “wet out”). At room temperature approximately 50% of ultimate bond strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours. This flow is faster at higher temperatures and slower at lower temperatures. Ultimate bond strength can be achieved more quickly (and in some cases bond strength can be increased) by exposure of the bond to elevated temperatures (e.g. 150°F [66°C] for 1 hour). This can provide better adhesive wetout onto the substrates. Abrasion of the surfaces or the use of primers/adhesion promoters can also have the effect of increasing bond strength and achieving ultimate bond strength more quickly.

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Technical Data

Overview

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Specifications

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Best Practices

*See Terms of Use Below
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Comparable Materials

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Peel Strength Test Methods

Peel Strength	Type	Cure Time	Substrate	Test Temperature	Test Method
High
20 (Ib/in)	90° Peel Strength	4,320 min	Stainless Steel	25°C	90° Peel Adhesion - Based on ASTM D3330 -To stainless steel, room temperature, jaw speed 12 in/min (305 mm/min). Average force to remove is measured. 72 hour dwell

Tensile Strength Test Methods

Tensile Strength	Cure Time	Substrate	Test Temperature	Test Method
High
95 psi	4,320 min	Aluminum	25°C	Normal Tensile (T-Block Tensile) - ASTM D-897 - To aluminum, room temperature, 1 in2 (6.45 cm2), jaw speed 2 in/min (50 mm/min.) Peak force to separate is measured. 72 hour dwell.

Shear Strength Test Methods

Shear Strength	Type	Cure Time	Substrate	Test Time	Test Temperature	Test Method
High
70 psi	Dynamic Overlap Shear Strength	4,320 min	Stainless Steel		25°C	Dynamic Overlap Shear - ASTM D-1002 - To stainless steel, room temperature, 1 in2 (6.45 cm2), jaw speed 0.5 in/min (12.7 mm/min.) Peak force to separate is measured. 72 hour dwell.
1500 (grams)	Static Shear Strength		Stainless Steel	600,000 sec	22°C	ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
1000 (grams)	Static Shear Strength		Stainless Steel	600,000 sec	66°C	ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
750 (grams)	Static Shear Strength		Stainless Steel	600,000 sec	93°C	ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
750 (grams)	Static Shear Strength		Stainless Steel	600,000 sec	121°C	ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.
750 (grams)	Static Shear Strength		Stainless Steel	600,000 sec	177°C	ASTM D3654 - To stainless steel, tested at various temperatures and gram loadings. 0.5 in2 (3.22 cm2). Will hold listed weight for 10,000 minutes (approximately 7 days). Conversion: 1500 g/0.5 in2 equals 6.6 lb/in2, 500 g/0.5 in2 = 2.2 lb/in2.

High Temperature Resistance Test Methods

High Temperature Resistance	Test Method
204°C	Short Term Temperature Tolerance - No change in room temperature dynamic shear properties following 4 hours conditioning at indicated temperature with 100 g/static load. (Represents minutes, hours in a process type temperature exposure).
149°C	Long Term Temperature Tolerance - Maximum temperature where tape supports at least 250 g load per 0.5 in2 in static shear for 10,000 minutes. (Represents continuous exposure for days or weeks).
110°C
90°C
75°C

3M 4955

Description for 3M 4955

Best Practices for 3M 4955

Surface Preparation

Application