3M 666

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Description for 3M 666

Double coated tape that is ideal for applications where one or both parts need to be repositioned or removed easily.

Chemical Resistance	Chemical Resistance: Good
Application Type	Bond, Removable/changeable foam gasketing
1 Part or 2 Part	1-Part
Material Form	Double coated Tape
Substrate	Paper, Plastic, Steel, Foam, Cardboard
Industry	Foils, Point of purchase displays
Manufacturer	3M
Chemistry	Plastic
Cure Method	Pressure Sensitive
Application Temperature (°F)	70 to 100
Color	Clear
High Temperature Resistance (°C)	52

Best Practices for 3M 666

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Technical Data for 3M 666

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Overview

Chemical Resistance
- Chemical Resistance : Relative Solvent Resistance - Good
Application Type
- Gasketing - Removable/changeable foam gasketing
- Adhesive - Bond
1 Part or 2 Part
- 1-Part
Material Form
- Tape - Double coated Tape
Substrate
- Foam
- Steel
- Plastic
- Paper - Cardboard
Industry
- Displays - Point of purchase displays
- Electronics - Foils
- Industrial
- Packaging - Plastic Packaging, Temporary hold for protective packaging material, such as foam or cardboard, used during shipment of manufactured goods
- Other - Reclosable bags or envelopes, Core starting and end tabbing of papers, foils, and films, Removable stickers and labels, Book inserts, Mounting promotional items, Removable/changeable advertisements
Chemistry
- Other - Plastic
Application Method
- Contact
Cure Method
- Pressure Sensitive (min) - Pressure Sensitive
Color
- Clear / Transparent - Clear

Specifications

Cure Specs

Application Temperature (°F)	70 to 100

Bond Strength

Peel Strength (piw)	23 (oz./in.), 25 (oz./in.)	Test Method

Material Resistance

UV Resistance	Excellent
High Temperature Resistance (°C)	52

Business Information

Shelf Life Details	Storage: Store in original cartons at 70°F (21°C) and 50% relative humidity.;If stored under proper conditions, these products retain their performance and properties for two years from date of manufacture.
Shelf Life Temperature (°F)	70
Shelf Life Type	From date of manufacture.
Shelf Life (mon)	24

Best Practices for 3M 666

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1. Surface Preparation
  
  To obtain optimum adhesion, the bonding surfaces must be clean, dry and well unified. Some typical surface cleaning solvents are isopropyl alcohol or heptane.
  
  Note: Carefully read and follow the manufacturer's precautions and directions for use when using solvents.
2. Application
  
  Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Firm application pressure helps develop better adhesive contact and improve bond strength.
  
  Initial tape application to surfaces at temperatures below 50°F (10°C) is not recommended because the adhesive becomes too firm to adhere readily. However, once properly applied, low temperature holding is generally satisfactory. An exception is 3M™ Repositionable Tapes 9425 and 9425HT which can be applied at temperature as low as 32°F (0°C).
Comparable Materials for 3M 666

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Spec Engine^® Results
- VHB Tape 4646(3M)
  • Dark gray • Interior bonding applications • Exterior bonding applications • Replace spot welds • Excellent solvent resistance. • Replace liquid adhesives • Replace rivets • High temperature resistance • UL 746C • Excellent durability.
- 764(3M)
  Can be used in non-critical applications such as color coding, bundling and safety marking, etc.
- 4932(3M)
  White, closed-cell acrylic foam carrier • Good adhesion to polypropylene and many powder paints• Apply as low as 50°F (10°C)
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