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EF2272A/2272B for high peeling strength polymer/Alu packaging

  • 01Description

    EF2272A/B is an Ester based two-component polyurethane adhesive specializing for Al foil laminating, widely used in laminating of various treated film like BOPP﹑PET﹑NY﹑PE﹑CPP﹑AL﹑Paper﹑etc .The adhesive has excellent odorlessness, transparency, flexibility
  • 02Performance characteristics

    Specializing to laminate Al foil with other polymer film with resistance to 100℃ boiling for 30 minutes, effective to avoid the happening of tunnel.  Odorless, the film laminated by EB2272A/B has good transparency, flexibility, aging resistance. High initial bonding strength, good peeling strength for structural AL/plastic film.With great wettability to films, EF2272A/B have good working property.
  • Health norms

    Health norms

    OCHEM EF2272A/2272B 2-component EA base polyurethane adhesive are in compliance with the positive lists of the following, internationally accepted guidelines for the production of articles intended to come into indirect contact with food stuff.

    - EU RoHS directive (EU) 2015/863 amending Annex II to directive 2011/65/EU

    - CFR, title 21, § 175.105 of the FDA, Washington D.C., respectively

    - Regulation (EC) No 1907/2006 concerning the REACH


  • Product specifications

    Product specifications

    These properties are typical but do not constitute specifications.

    Item

    EF2272A

    (OH   component)

    EF2272B

    (NCO   component)

    Type

    Main   agent

    Hardener

    Ingredient

    Polyester   polyol agent

    Isocyanate-terminated   Polymer

    Appearance

    Light   yellow transparent liquid

    Light   yellow transparent liquid

    Solid   Content(%)

    72±2

    75±2

    Viscosity   (mPa.s20)

    5000±1000

    2500±1250

    Solvent

    Ethyl   acetate

    Ethyl   acetate

    Mix   Proportion

    5

    1

    Shelf   life

    360days

    360days


  • Operating conditions

    Operating conditions

    Recommended Operating Conditions

    Application Method                Direct gravure                               

    Application Cylinder               100-200 line (65-80 line per cm)               

    Application solids                 20-40% (Recommend 30%)                    

    Pot Life          Static           8 hours approximately                        

                    Dynamic         24 hours approximately                       

    Dry Coating Weight                2.0-4.0 gsm depending on structure              

    Drying Section Temperature          50-60℃ 60-70℃ 7080℃(three section)                  

    Laminating Temperature             50-80℃                                   

    Cure Time                         45-55℃  24 hours for general purpose, 48hours for boiling  grade or Al foil                         

    Cleaning Solvent                   Ethyl Acetate                                   

     

    Mix Ratio By Weight

    Solid content(%)

    Mix   Ratio

    Operating   Mix Ratio In Drums Weight

    EF2272A

    EF2272B

    EF2272A

    EF2272B

    Ethyl   Acetate(kgs)

    35

    5

    1

    20

    4

    25.6

    30

    5

    1

    20

    4

    33.6

    25

    5

    1

    20

    4

    45.6

    20

    5

    1

    20

    4

    63.2

     

    Solvent is ethyl acetate, acetone, MEK, the water content should be less than 0.03%, the alcohol content should be less than 0.02%, Ethyl acetate is recommended.


  • Packing specifications

    Packing specifications

    Pack in steel drum normally.

    Main agent is 20kg/drum. Hardener is 4kg/drum.

  • Store

    Store

    Store in cool, dry, well-ventilated area away from heat and ignition sources . Keep container tightly closed.

    Refer to MSDS for more safety information

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  • Special instructions

    Special Instructions

    1. The LDPE and CPP films must be corona-treated with a surface tension greater than 38 mN/m. The PA film must be double-corona treated as an intermediate layer. The surface tension must not be less than 52 mN/m; the surface tension of the PET film must not be Less than 52 mN/m.

    2. The temperature and humidity of the environment have a great influence on the time for storing the configured adhesive. It is recommended to arrange the adhesive in small quantities for a few times in high temperature and high humidity weather to avoid waste.

    3. During the laminating processing, care must be taken to check and control the viscosity.

    4. Residual adhesive: The remaining adhesive cannot be used in principle. If the amount of residual liquid is excessive, it shall be sealed and stored in cool place after dilution, which could be used as diluent for operation in next day, and a small amount shall be little by little added to the newly prepared adhesive solution. It cannot be used any more, if it appears cloudy, translucent or thickened.

    5. The concentration and additives in the film have an influence on the bonding strength of the laminated film and must be selected before use.

    6. Do not mix this product with other adhesives. If necessary, please consult our technical department.

    7. Pay attention to fire prevention and static elimination.


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