MYLAR® RL42/RL42AF/RL42AT

Product Description

Mylar® RL42 is a biaxially oriented polyester (OPET) with an ethylene vinyl acetate (EVA) heat seal layer. It is used as a heat sealable lidding film in packaging frozen and refrigerated foods. Mylar® RL42 is commercially available in nominal 50, 75, 100 and 150 gauges.

Mylar® RL42 is designed to produce strong seals to polypropylene (PP). Although designed especially to seal to polypropylene, Mylar® RL42 seals to a broad range of container substrates including amorphous polyester (APET, also PETG), semicrystalline polyester (CPET), polyester coated paperboard, polyvinylchloride (PVC), polyethylene (HDPE), and polystryrene (HIPS).

Mylar® RL42 has the same heat seal layer thickness as Mylar® RL32, but produces a stronger seal to polypropylene. Mylar® RL42 can produce tearing seals to polypropylene and other substrates under chilled conditions. Like the other "RL" types with EVA heat seal layer, Mylar® RL42 has a lower seal initiation temperature than lidding films with an amorphous polyester heat seal layer (e.g., Mylar® OL, OL2). This allows good seals to be made at higher line speeds (or using lower sealing temperatures).

Mylar® RL42 can withstand freezing temperatures down to -40℉.

Special Features

Corona Treatment (Mylar® RL42T): Selected gauges of Mylar® RL42 are available with corona treatment (on the opposite side of film from the heat seal layer) to enhance printing and laminating. This film type is marketed by Mylar® Specialty Films as Mylar® RL42T. The film is treated to an initial dyne level of 54. The dyne level of treated lidding films may decline with storage, and in-line corona treatment may be required during subsequent printing or laminating to increase the dyne level to a value adequate to get desired ink or laminate adhesion. Standard put-ups for Mylar® RL42T are the same as shown for Mylar® RL42.

Anti-fog (Mylar® RL42AF, RL42AT): Selected gauges of Mylar® RL42 lidding films are available with anti-fogging capability to provide better clarity when stored and displayed in refrigerated conditions. This film type is marketed by Mylar® Specialty Films as RL42AF and is commercially available in nominal 50 and 100 gauges. Mylar® RL42AF is also available with corona treatment on the opposite side of film from the heat seal layer. This film type is marketed by Mylar® Specialty Films as Mylar® RL42AT, and is commercially available in nominal 50 and 100 gauges.

Approvals

Food Contact Status - Please contact your Mylar® Specialty Films representative to receive the Regulatory Compliance documents

Disposal

Disposal of Mylar® RL42 does not present special disposal problems. They can be buried as a relatively inert material in a landfill or burned in an incinerator with normal refuse. The incinerator should have sufficient draft to exhaust all combustion products through the stack to avoid exposure to irritating fumes. The disposal method should comply with local, state and federal regulations.

Typical Properties

Available Thickness [Gauge] 50;    75;    100;    150

Property Thickness Value Units Test BARRIER Gas Permeability - O2, 24 hr  100  5  cc/100 in²  ASTM D3985 22℃/50% RH/1 ATM  Gas Permeability - O2, 24 hr  150  3  cc/100 in²  ASTM D3985 22℃/50% RH/1 ATM  Gas Permeability - O2, 24 hr  50  9  cc/100 in²  ASTM D3985 22℃/50% RH/1 ATM  Gas Permeability - O2, 24 hr  75  7  cc/100 in²  ASTM D3985 22℃/50% RH/1 ATM  WVTR  100  1.3  g/100 in²/day  ASTM F1249 38℃, 90% RH  WVTR  150  0.9  g/100 in²/day  ASTM F1249 38℃, 90% RH  WVTR  50  2.8  g/100 in²/day  ASTM F1249 38℃, 90% RH  WVTR  75  1.9  g/100 in²/day  ASTM F1249 38℃, 90% RH    PHYSICAL Elongation at Break MD  50 - 150  110  %  ASTM D882A  Elongation at Break TD  50 - 150  80  %  ASTM D882A  Modulus  50 - 150  550  kpsi  ASTM D822  Tear (Graves)  100  1.1  lb  ASTM D1004  Tear (Graves)  150  1.3  lb  ASTM D1004  Tear (Graves)  50  0.7  lb  ASTM D1004  Tear (Graves)  75  0.9  lb  ASTM D1004  Tensile Strength MD (break)  50 - 150  25  kpsi  ASTM D882A  Tensile Strength TD (break)  50 - 150  35  kpsi  ASTM D882A  Unit Weight  100  24.5  lb/ream  ASTM E252 (0.5 m2)  Unit Weight  150  35.5  lb/ream  ASTM E252 (0.5 m2)  Unit Weight  50  14.8  lb/ream  ASTM E252 (0.5 m2)  Unit Weight  75  20.8  lb/ream  ASTM E252 (0.5 m2)  Yield (nominal)  100  17,800  in²/lb    Yield (nominal)  150  12,200  in²/lb    Yield (nominal)  50  29,500  in²/lb    Yield (nominal)  75  20,800  in²/lb

Contact Info

Mylar® Specialty Films U.S. Limited Partnership 3600 Discovery Drive Chester, VA 23836-6436 USA Tel: (800) 635-4639 Fax: (804) 530-9867

Disclaimer

Note: These values are typical performance data for Mylar® Specialty Films' polyester film; they are not intended to be used as design data. We believe this information is the best currently available on the subject. It is offered as a possible helpful suggestion in experimentation you may care to undertake along these lines. It is subject to revision as additional knowledge and experience is gained. Mylar® Specialty Films makes no guarantee of results and assumes no obligation or liability whatsoever in connection with this information. This publication is not a license to operate under, or intended to suggest infringement of, any existing patents. CAUTION: Do not use in medical applications involving permanent implantation in the human body (Mylar® Specialty Films Medical Policy). For other medical applications, see the Medical Caution Statement. Mylar® Specialty Films accepts no liability for use of it's products in medical applications not reviewed and approved by Mylar® Specialty Films or for product misuse. Mylar® Specialty Films supplies products to an agreed specification and does not manufacture products designed specifically for medical end use. Melinex®, Mylar® and Melinex® STTM are registered trademarks of Mylar® Specialty Films U.S. Limited Partnership.