CS-U film has good sealing property at low temperatures and sealable even with bags stacked

  • Gas barrier properties
  • Non-curl
  • Label adhesion
  • High transparency and gloss
  • High strength
  • Suitable for heat sealing
  • Pinhole resistant (frozen)
  • Flavor retention property


Special polyethylene resin is used for the inner layer, which has good sealing compatibility at low temperatures. The film can be sealed even with bags stacked thanks to its material composition that makes use of the difference in melting points between the inner and outer layers of the film. In addition, since the pinhole resistance under frozen conditions combines CS-H features, using a special polyethylene resin gives the film more flexibility than CS-H and improves pinhole resistance. Due to these two features, it is used for vacuum packing, it is used for vacuum packing chilled pork products. We also have a lineup of purpose-made standard rolls.

  • Sealable even when bags are stacked

  • Pinhole resistance

  • High aroma retention property

  • Inhibits drip spread

  • Good label adhesion


  1. Stack-sealable bag

    Stack-sealable bags

    Special polyethylene resin is used for the inner layer, which enables low-temperature sealing. Multiple bags can be sealed when stacked.

  2. Pinhole resistance under frozen conditions

    Pinhole resistance fit for frozen distribution

    The flexibility characteristic of co-extruded multilayer films suppresses pinhole occurrence and using polybutylene terephthalate (PBT) resin in the outermost layer protects the strong nylon resin and improves cold pinhole resistance.

  3. Highly flavor retention

    Maintains the aroma and flavor of freshly prepared food.

    Aromatic polyester resins such as polybutylene terephthalate resin (PBT resin) have the property of retaining the aroma and flavor of the contents. This property has been used to impart a flavor-retention function to the film.

  4. Drip prevention bag

    Reduces drips and improves appearance

    Due to the low melting point of the inner layer, the inner surface fuses during vacuum boiling sterilization (three minutes at 85°C), preventing drips and improving the finished appearance.

  5. Easy labeling pouch

    Good label adhesion

    Polybutylene terephthalate resin (PBT resin), which has a very low water absorption rate and is used as the outermost layer. This minimizes moisture absorbed by the film surface and prevents adhesive loss with the label glue. PBT resin is a hydrophilic resin, and since most label glues are acrylic resin, which is also a type of hydrophilic resin, this technology takes advantage of the characteristics that resins with the same properties tend to bond together.


  • Processed meat products (refrigerated/frozen)
    • Bacon
    • Roast pork
  • Raw meat (refrigerated)
    • Chilled pork


Main applications
Processed meat products (refrigerated/frozen) /
Processed seafood (refrigerated/frozen) /
Others (refrigerated/frozen)
Use temperature range
Layer composition
Number of layers
5 layers
Adhesive resin /
Nylon /
Adhesive resin /
Special L-LDPE
50μm /
60μm /
70μm /
80μm /
100μm /
100mm ~ 550mm

Table can swipe left or right

Test item Test method Units 50μm 80μm 100μm 120μm
Tensile strength JIS K 7127 MPa MD 37 37 37 37
TD 34 34 34 34
N MD 19 29 37 44
TD 17 28 34 41
Tensile elongation JIS K 7127 MD 430 430 430 430
TD 420 420 420 420
Tear strength JIS K 7128 N/mm MD 120 120 120 120
TD 110 110 110 110
N MD 6 9.6 12 14
TD 5.3 8.7 11 13
Heat sealing strength JIS Z 1707 N/15mm 25 32 37 43
Oxygen transmissivity JIS K 7126 cc/m2・24h・atm
(23℃ , 75%RH)
90 50 42 37
Moisture permeability JIS Z 0208 g/m2・24h
(40℃ , 90%RH)
9.9 7.7 6.2 5.3
Puncture strength JIS Z 1707 N 3.1 4.9 6.1 7.3

*These are representative values and not guaranteed.


  1. STEP.01


  2. STEP.02

    Specifications meeting / Estimate creation

  3. STEP.03

    Order / Production start

  4. STEP.04

    Shipping / Delivery

  5. STEP.05

    After-sales service


Can it be boiled?
Yes, but the inner surface of the film will heat fuse in three minutes at 85°C.
Can it be frozen?
Yes, it can be frozen down to -40°C.
Can it be printed on?
Yes, it can be.
Can we use an oxygen absorber with it?
Yes, you can, but we recommend Barrier 7 film for high barrier performance.
Do you have colored films?
This is not in our current lineup, but we can explore the possibility. Please contact us for more information.

Contact us

Please feel free to contact us for any request or consultation.

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