Kuraray Co. Ltd. (Headquarters: Chiyoda-ku, Tokyo; President: Fumio Ito) has further augmented the moisture protection properties of KURARISTER* transparent high barrier film for food packaging retort** to create KURARISTER CF and initiated full-scale sales of the new product. While promoting the use of KURARISTER CF as an alternative to the aluminum foil laminated packaging that are currently in widespread use, we will actively pursue development in fields outside of food packaging, with an eye to providing packaging for pharmaceuticals and other medical products, IV solution, liquid meals and pet food, areas in which plastic retort package are being used with increasing frequency.
*KURARISTER: Kuraray began exclusively marketing this transparent high barrier film for use in retort food packaging in 2005. The product’s principal technical characteristic is that it is a hybrid composite of organic and inorganic materials. Owing to its high gas impermeability, durability under retort processing, transparency and secondary processability, in addition to various food packaging applications KURARISTER is appropriate for packaging applications in the pharmaceutical, pet food and beverage industries.
**Retort packaging (sterilizing treatment, applying heat and pressure): Retort are used to sterilize the content of pouches that are sealed. The pouches are usually heated for 30 to 60 minutes at 120°C to ensure thorough sterilization. To preserve flavor, the temperature may be kept at between 105°C and 115°C, a process known as semi-retort processing. To speed up sterilization the temperature may be raised to between 125°C and 135°C, a process known as high retort processing.
|Item||Retort Condition||KURARISTER C||KURARISTER CF||Inorganic coated PET|
|Oxygen permeation rate |
|After retort||30 min. at 120°C||0.4||0.4||0.5|
|Moisture permeation rate |
|After retort||30 min. at 120°C||6||0.2||2.0|
¥2.0 billion per year
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