Difference between revisions of "Aclar"

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== Description ==
 
== Description ==
  
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[Honeywell] A registered trademark for a moisture barrier film made from [[polychlorotrifluoroethylene|polychlorotrifluoroethylene]] (PCTFE).  Aclar films (sold by Honeywell) contain only PCTFE, which is an extremely good moisture barrier that is also thermoformable and used in many many packing applications, such as for pill dispensers. Films composed of only PCTFE do not provide a good oxygen barrier.  
+
[Honeywell] A registered trademark for a moisture barrier film made from [[polychlorotrifluoroethylene|polychlorotrifluoroethylene]] (PCTFE).  Aclar films (sold by Honeywell) contain only PCTFE, which is an extremely good moisture barrier that is also thermoformable and used in many many packing applications. Films composed of only PCTFE do not provide a good oxygen barrier. Traditionally, Aclar is used in pharmaceutical, medical, electronics, and military packaging.  
  
 
To provide an additional oxygen barrier, Honeywell recommends that Aclar by laminated with substrates such as PVCm EVOH and other.  several companies provide laminated versions of Aclar.  
 
To provide an additional oxygen barrier, Honeywell recommends that Aclar by laminated with substrates such as PVCm EVOH and other.  several companies provide laminated versions of Aclar.  
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the PCTFE is laminated with [[polyester|polyester]] (PET), then sandwiched between two layers of [[polyethylene|polyethylene]] (PE). The multifilm laminate provides a barrier for oxygen and water vapor. The thermoformable barrier film comes in opaque and clear options. Traditionally, Aclar is used in pharmaceutical, medical, electronics, and military packaging. Aclar has been used to prepare sealed bags for low-oxygen level pest eradication.
+
the PCTFE is laminated with [[polyester|polyester]] (PET), then sandwiched between two layers of [[polyethylene|polyethylene]] (PE). The multifilm laminate film provide a thermoformable, clear, barrier for oxygen and water vapor.  
  
 +
Examples of PCTFE laminate films as both moisture and oxygen barriers:
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{| class="wikitable" style="vertical-align:bottom;"
 +
|- style="font-weight:bold; background-color:#FCE4D6;"
 +
! Tradenames
 +
! Composition layers
 +
! Thickness (mils)
 +
! Water-vapor transmission gm/m2 per 24 hours
 +
! Oxygen transmission cc/m2 per 24 hours
 +
|-
 +
| Aclar UltRX 600
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| [[polychlorotrifluoroethylene|polychlorotrifluoroethylene]] homopolymer
 +
| 6.0 Mils 
 +
| 0.0047 (25°C 60%RH)
 +
| 27.6
 +
|-
 +
| Filmpak 1193
 +
| [[Polyester]]\[[polyethylene]]\[[Aclar]]\Polyethylene
 +
| 4.9 Mils 
 +
| 0.03 (90% RH, 100°F)
 +
| 0.05
 +
|-
 +
| ESCAL
 +
| [[polypropylene]]\Silica deposited [[polyvinyl alcohol]]\ LLDPE
 +
| 114 microns
 +
| 0.01 (25°C 60%RH)
 +
| 0.05 (25°C 60%RH)
 +
|-
 +
| EVOH/nylon barrier film
 +
| [[EVOH]], [[nylon]]
 +
| 3.0 Mils 
 +
|
 +
| 2.3 cc/m2 per 24hr.
 +
|-
 +
|}
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  

Revision as of 13:57, 4 March 2023

Aclar

Description

[Honeywell] A registered trademark for a moisture barrier film made from Polychlorotrifluoroethylene (PCTFE). Aclar films (sold by Honeywell) contain only PCTFE, which is an extremely good moisture barrier that is also thermoformable and used in many many packing applications. Films composed of only PCTFE do not provide a good oxygen barrier. Traditionally, Aclar is used in pharmaceutical, medical, electronics, and military packaging.

To provide an additional oxygen barrier, Honeywell recommends that Aclar by laminated with substrates such as PVCm EVOH and other. several companies provide laminated versions of Aclar. the PCTFE is laminated with Polyester (PET), then sandwiched between two layers of Polyethylene (PE). The multifilm laminate film provide a thermoformable, clear, barrier for oxygen and water vapor.

Examples of PCTFE laminate films as both moisture and oxygen barriers:

Tradenames Composition layers Thickness (mils) Water-vapor transmission gm/m2 per 24 hours Oxygen transmission cc/m2 per 24 hours
Aclar UltRX 600 Polychlorotrifluoroethylene homopolymer 6.0 Mils 0.0047 (25°C 60%RH) 27.6
Filmpak 1193 Polyester\Polyethylene\Aclar\Polyethylene 4.9 Mils 0.03 (90% RH, 100°F) 0.05
ESCAL Polypropylene\Silica deposited Polyvinyl alcohol\ LLDPE 114 microns 0.01 (25°C 60%RH) 0.05 (25°C 60%RH)
EVOH/nylon barrier film EVOH, Nylon 3.0 Mils 2.3 cc/m2 per 24hr.

Synonyms and Related Terms

Arclar (sp); Alcar (sp); thermoform barrier film; moisture barrier film

Collection Risks

Inert, non-flammable, solvent resistant.[1]

Physical and Chemical Properties

For 0.9 mil film:

  • Oxygen transmission: 13.9 ml/m²d
  • Water vapor transmission @77F (25C) / 60% RH: 0.028 gms/m²/day
  • Melting Point: 211°C

For more information see Technical Data Sheets

Working Properties

Typically used in combination with marvelseal for making anoxic enclosures for treating objects with insect infestations/pests. [2]

Can be laminated to a multitude of substrates, including Polyvinyl chloride (PVC), Polyethylene terephthalate (PET), Polypropylene (PP), cyclic olefin copolymer (COC) and Ethylene vinyl alcohol (EVOH) to add an oxygen and light barrier or create a more sustainable packaging solution for your application.[3]

Exhibit Construction Reviews/Tips/Case Studies

An open-ended heat sealer works well to seal Aclar and allows for custom bag shapes to fit objects.[4]

Resources and Citations

  1. ↑ Aclar Film Data Sheet
  2. ↑ PACCIN: Marvelseal 360 Aluminized Barrier Film
  3. ↑ Honeywell Aclar Product Information
  4. ↑ PACCIN Thread: "Best Material for covering sculptures in storage"
  • Kaela Nurmi, contributed information, MWG group, 2020.
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  • Pam Hatchfield, Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002

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