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VELCRO® brand Adhesives

 

 

Types of Adhesive Systems

Woven VELCRO® brand tapes have an elastomeric binder coat which firmly locks hooks and loops in the ground weave and helps prevent raveling of the tapes when cut. Due to this coating, many commercial adhesives will not readily adhere to the back of this tape. Therefore, the use of a pre-coated adhesive backing is recommended for the majority of adhesive applications.

Pressure Sensitive Pre-Coats Pressure sensitive pre-coats are popular because of the ease of application. Simply remove the release liner and press VELCRO® brand tape in place. However, pressure sensitive pre-coats can creep under constant stress. A general rule of thumb is the greater the tack, the faster the creep; the lower the tack, the better the load-bearing characteristics. Pressure sensitive pre-coats should always be considered semi-permanent bonds.

VELCRO® brand's pressure sensitive adhesives each have specific performance characteristics for different adhesive requirements.

Solvent or Heat Activated Adhesive Pre-Coats Factory applied pre-coated adhesive backings, available on most VELCRO® brand hook and loop tapes, provide the strongest adhesive bond to the tape itself and can be made ready for instant bonding by many easy methods of application (e.g.: solvent, heat, ultrasonic, dielectric, etc.) directly to the substrate. They can also be used as a tie coat for a liquid adhesive.


 

 

For Best Results

  • Adhesive should be applied at a room temperature of 68ºF or higher.
  • Surfaces should be clean, dry and free of oils and dust prior to application.
  • Use within the shelf life from date of manufacture.
  • Be careful not to touch adhesive with your fingers.
  • Allow 24 hours after application to reach full bond strength.
  • Adhesive is not washable or dry cleanable.
  • Rounding pointed tape corners can eliminate edge peeling problems.
  • Not recommended for use in water or on plastics with high concentrations of plasticizers.

 

 

Pressure Sensitive Adhesives

Adhesive #14

is a strong rubber-based pressure sensitive adhesive with a higher temperature range designed for use in applications requiring fast turn-around under production conditions such as in Packaging, Medical, Toys and other markets. This adhesive has a light straw color and may show through on white or light shades of tape.

  • High tack - quick setting
  • Achieves 90% bond strength in about an hour; full strength - 24hours
  • Temperature operating range 0° to 160°F
  • Shelf life is 3 years from date of manufacture

Bond Development times


Above tests conducted on unpainted aluminum test panels and represent minimum performance values. All performance data represents design guidelines and are not for use as specification values.

Adhesive #15

is a rubber-based pressure sensitive adhesive with a medium temperature range for use in applications requiring fast turn-around under production conditions such as in Packaging, Medical, Toys and other markets. This adhesive has a light cream color and may show through on white or light shades of tape.

  • Aggressive - high tack - quick setting
  • Achieves 80% bond strength in about an hour; full strength - 30 hours
  • Recommended for most room temperature applications
  • Temperature operating range -40° to 120°F
  • Shelf life is 3 years from date of manufacture

Bond Development times


Above tests conducted on unpainted aluminum test panels and represent minimum performance values. All performance data represents design guidelines and are not for use as specification values.

Adhesive #72

is an acrylic pressure sensitive adhesive for high temperature performance and superior bond strength for uses in the Exhibit Industry, Automotive, Medical, Computer and other industries.

  • Moderate tack-medium set up
  • High temperature use
  • High strength
  • Full bond strength - 24 hours
  • Temperature operating range 0¾F to 225¾
  • Shelf life is 3 years from date of manufacture

Bond Development times


Above tests conducted on unpainted aluminum test panels and represent minimum performance values. All performance data represents design guidelines and are not for use as specification values.

Adhesive #75

is an acrylic pressure sensitive adhesive, similar to Spectrum™ 0172. Acrylic adhesive systems are resistant to breaking down over time, giving the longevity needed for long-term outdoor applications. In addition, Spectrum Plus™ is extremely water- resistant and it's ability to maintain a load without creeping under high temperature conditions makes this adhesive ideal for tonneau cover applications.

  • Moderate tack-medium set up time
  • High temperature use
  • High strength
  • Superior hold under wet condidtions
  • Maintains a PSI load at 200°F and a .5 PSI load at 350°F with virtually no creep
  • Adhesive strength actually increases after exposure to moisture
  • Shelf life is 2 years from date of manufacture

Bond Development times


Above tests conducted on unpainted aluminum test panels and represent minimum performance values. All performance data represents design guidelines and are not for use as specification values.

We normally recommend the #72 adhesive for trade show applications, but let us know if your needs are different.

Velcro USA can also provide fire-retardant adhesives. Please inquire for details.

The full Velcro adhesive guide can be found here.

 

 

Recommended Substrates

Test Materials TEMPO™
(0114)
Adhesive
#15
Adhesive
#72
Adhesive
#75
ABS
Acrylic Sheet
Aluminum
Ceramic Tile
Corrugated Paperboard

Elpo Panel
Glass
Painted Wallboard

Plywood, Lacquered
Plywood, Raw
Polycarbonate
Polyester/Fiberglass
Polyethylene

Polypropylene

Polystyrene
Steel, Raw
Vinyl, Rigid

 

 

Solvent Activated Pre-Coat #40

A non-tacky adhesive pre-coat applied to the back of VELCRO® brand tapes. This product is recommended for applications where a more permanent bond is desired. Activated by MEK, acetone, or MCL, this adhesive is suitable for a wide range of substances, such as metals and plastics, including vinyl. Ultimate bond strength is achieved in 24 hours. The service temperature of this adhesive is -40º to 250º F. Recommended shelf life is one year from the date of manufacture.

Bonding Method:
If substrate is a non-porous smooth surface, apply the recommended solvent activator freely to the back of the pre-coated Velcro® brand tape with a brush or sponge applicator and allow the adhesive to become tacky. (Proper tackiness occurs when the adhesive clings to a finger placed on it.) When tacky, position the tape on a cleaned substrate using finger pressure to smooth tape. (This is most important on edges and corners.) Follow a few minutes later with additional hand pressure to ensure a complete bond. Let dry overnight or speed up drying with 140°F heat.


 

 

Heat Activated Pre-Coat #43

A non-tacky adhesive pre-coat applied to the back of VELCRO® brand tapes. This product is activated by the use of ultrasonics and dielectrics (RF) machinery or other common heat-generating equipment. This adhesive will bond to a wide range of fabrics and plastics and has excellent water resistance. Ultimate bond strength is achieved in 24 hours. The service temperature of this adhesive is -40° to 160°F. Recommended shelf life is one year from the date of manufacture.

Bonding Method:
ULTRASONICS - Pre-coated tape should be positioned on top of substrate. A perimeter weld at least 1/8" wide should be used to prevent peel delamination. Machine settings including pressure, weld and hold time should be varied according to weld patterns. DIELECTRICS (RF) - Pre-coated tape should be positioned on top of substrate (commonly vinyl). A perimeter weld at least 1/8" wide should be used to prevent peel delamination. Machine settings including energy level, pre-seal, seal and cool times may vary according to weld patterns. IRON - Substrate (commonly fabric) should be positioned on top of pre-coated tape. Pass iron over substrate several times at incremental heat settings until adhesive softens onto substrate. Do not allow adhesive to contact hot iron surface. Allow to cool before hand peel testing.


 

 

Recommended Application Method

Application
Method
Solvent Activated Pre-Coat
#40
Heat Activated Pre-Coat
#43
RF Weld/Dielectrics
MEK (Methyl Ethyl Keytone)
Heat

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