Covinax 525-78

PRODUCT DESCRIPTION

Covinax 525-78 is a coater-ready, surfactant stabilized, tackified vinyl acrylic copolymer adhesive developed for high performance permanent pressure sensitive applications. It has an excellent balance of peel adhesion and shear adhesion. Covinax 525-78 is internally crosslinked, giving it superior cohesive strength. It will resist cold flow and will die cut and convert well, giving dry edges to finished sheets and rolls. This product was designed to be transfer coatable on gravure and roll coaters.
Covinax 525-78 is FDA compliant under 21CFR 175.105, 16CFR 1500.3(C)(4) and 16CFR 1500.(C)(2)(i).


PHYSICAL PROPERTIES

Polymer Type: Vinyl Modified Acrylic Copolymer
Protective System: Anionic
Color: Off white            
Viscosity (cps): 275 - 825 (RVF, Spindle #3/20 RPM/77° F)
Percent Solids (%): 52.5 - 54.5 
pH: 5.8 - 7.0
Weight Per Gallon: 8.5
Glass Transition Temperature (Tg):(DSC): -26.5° C

 

PERFORMANCE PROPERTIES

A 1 mil (28g/m2) dry film of Covinax 525-78 cast directly onto 1 mil thickness polyester film will exhibit the following average performance properties when tested on #304 stainless steel, which has a #3 surface finish. 
Test                                                   Typical Values             Specification Range
180° Peel Adhesion1 (lb)                             2.9                            2.5 minimum
178° Shear Adhesion2 (minutes)                340                           150 minimum
Loop Tack3 (lb)                                            3.8                           2.7 minimum

 
 

Minimum Application Temperature:     >32°F                                  N/A   
Service (Use) Temperature:             20°F to 250°F                           N/A 


NOTE:  Minimum application and service temperatures are dependent upon many factors including face stock, adhesive coat weight, adhesion, and intended application.  We can only offer an estimate based on the Tg and typical performance properties of the adhesive.

 

FDA Compliance: 21 CFR 175.105

                               16 CFR 1500.3(C)(4)
                              16 CFR 1500.3(C)(2)(I)

 

  

 
AVERAGE APPLICATION PROPERTIES

 
    A = Adhesive      C = Cohesive      FP = Fiber pick      PT = Paper Tear             
 
 

ADDITIONAL INFORMATION

Yellowing (Colorimeter “b” value)



STORAGE AND HANDLING

Shelf life: Best if used within three months of date of manufacture. Mix before use for best results. Product is not freeze/thaw stable.

For additional questions, Franklin’s technical service team is available at 1.800.877.4583. 24/7 technical service is available online at www.franklinadhesivesandpolymers.com.

 



IMPORTANT NOTICE TO CUSTOMER:
The recommendations and data contained in this Product Data Sheet for use of this product are based on information Franklin believes to be reliable. They are offered in good faith without guarantee, as conditions and methods of use of our product by Customer are beyond Franklin’s control. Customer must determine the suitability of the product for a particular application before adopting it on a commercial scale.
All orders for Franklin products shall be subject to Franklin International, Inc.’s Standard Terms and Conditions of Sale which may be found at http://www.franklini.com/Terms_and_Conditions.aspx. (“Standard Terms”). Different or additional terms proposed by Customer are expressly rejected and shall not become part of the agreement between Customer and Franklin International, Inc. with respect to any order. Contact Franklin International, Inc. immediately if you cannot access our Standard Terms and we will provide you a copy upon request. Any sale of products by Franklin to Customer is expressly conditional upon Customer’s consent to the Standard Terms, and Customer’s acceptance of any performance by, or receipt of products from, Franklin International, Inc. shall constitute Customer’s acceptance of the Standard Terms and Conditions of Sale.
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