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  • RECYCLE

Mono-material Packaging

  • RECYCLE

Mono-material Packaging

As one of the eco-friendly solutions for packaging, there is a trend to change film structures using some different materials to mono-polyolefin structures aiming to improve recyclability. However, typical mono-olefin packaging structures tend to face technical issues such as sealability, fillability and tearability. By using our product NUCREL™ as a seal layer, such technical issues can be solved.

As one of the eco-friendly solutions for packaging, there is a trend to change film structures using some different materials to mono-polyolefin structures aiming to improve recyclability. However, typical mono-olefin packaging structures tend to face technical issues such as sealability, fillability and tearability. By using our product NUCREL™ as a seal layer, such technical issues can be solved.

  • Our Proposal for Improved Mono-polyolefin Packaging

In case of varrier packaging using VM-PET film as a varrier layer, PET film as a substrate and LDPE or LLDPE as a seal layer, changing it to a polyolefin packaging by just changing varrier layer and substrate tend to cause technical issues of  sealability, fillability and tearability. By changing seal layer from LDPE or LLDPE to our resin product NUCREL™ will solve those technical issues.

  • Our Proposal for Improved Mono-polyolefin Packaging

In case of varrier packaging using VM-PET film as a varrier layer, PET film as a substrate and LDPE or LLDPE as a seal layer, changing it to a polyolefin packaging by just changing varrier layer and substrate tend to cause technical issues of  sealability, fillability and tearability. By changing seal layer from LDPE or LLDPE to our resin product NUCREL™ will solve those technical issues.

en_monomate_problem-3
  • Seal Performances

By using NUCREL™ instead of LLDPE as a seal layer instead of LLDPE, sealing performance at low-temperature and hot tack strength are significantly improved. 

  • Seal Performances

By using NUCREL™instead of LLDPE as a seal layer instead of LLDPE, sealing performance at low-temperature and hot tack strength are significantly improved. Sealing performance at low-temperature and hot tack strength are better than the structure using LLDPE film as a seal layer.

Evaluated fim structure
 (1) OPP(20μm)/ac, PE(15μm)/VM-OPP(25μm)/ac + resin(25μm
 (2) OPP (20μm)/ac, PE (15μm)/VM-OPP (25μm)/ac, LDPE (10μm)/LLDPE film (30μm)
en_monomate_seal-2
<Seal conditions>
 Pressure: 0.2MPa, Duration: 1.0sec, Seal width: 10mm, heated one-side only
<Measurement conditions>
Width of specimen: 15mm, Speed: 300mm/min, T-type peeling (MD)

 

en_monomate_hottack-2
<Seal conditions>
 Pressure: 0.4MPa, Duration: 1.0sec, Seal width: 19.1mm, Heated both sides
<Measurement conditions>
Width of specimen: 25.4(1inch)mm, Duration: 375msec, Peeling speed: 90mm/min, T-type peeling (MD)

 

  • Mechanical Properties 

By using NUCREL™ instead of LLDPE as a seal layer instead of LLDPE, properties of easy tear in MD and puncture strength are improved while keeping the easy tear property in TD at the similar level. Easy tear properties (both MD and TD) and pucture strength are better than the structure using LLDPE film as a seal layer as well.

  • Mechanical Properties 

By using NUCREL™ instead of LLDPE as a seal layer instead of LLDPE, properties of easy tear in MD and puncture strength are improved while keeping the easy tear property in TD at the similar level. Easy tear properties (both MD and TD) and pucture strength are better than the structure using LLDPE film as a seal layer as well.

Evaluated fim structure
(1) OPP(20μm)/ac, PE(15μm)/VM-OPP(25μm)/AC + resin(25μm
(2) OPP (20μm)/ac, PE (15μm)/VM-OPP (25μm)/AC+LDPE (10μm)/LL film (30μm)
en_monomate_tear_md-4
Tear distance: 45mm
en_monomate_tear_td-4
Tear distance: 45mm
en_monomate_puncture-3
Test speed: 50mm/min, Pin: R 0.5、1mmΦ, tested from sealant layer side
  • Overview: Film Properties

By using NUCREL™ grades as a seal layer, seal performance and mechanical properties of mono-polyolefin packaging will be improved. The same can be said in the comparison to a fillm structure using LLDPE film as a sealant layer.

  • Overview: Film Properties

By using NUCREL™grades as a seal layer, seal performance and mechanical properties of mono-polyolefin packaging will be improved. The same can be said in the comparison to a fillm structure using LLDPE film as a sealant layer.

 

Property
Sealant Layer
   
NUCREL™
LLDPE
(Density 906)
LLDPE Film
(Low temperature seal type)
   
Sealability Low Temperature
Far better
N/A
N/A
   
Hot Tack Strength
Far better
N/A
Slightly better
   
Seal Strength (120degC)
N/A
N/A
Far better
   
Tear Resistance
Elmendorf method
MD 
Far better
N/A 
Slightly better
   
TD
N/A
N/A
Poor
   
Puncture Strength
Better
N/A
Poor
   

 

 

Property
Sealant Layer
 
NUCREL™ 
LLDPE 
 (Density 906)
LLDPE Film
(Low temperature seal type)
 
Sealability Low Temperature
Far better
N/A
N/A
 
Hot Tack Strength
Far better
N/A
Slightly better
 
Seal Strength (120degC)
N/A
N/A
Far better
 
Tear Resistance
Elmendorf method
MD 
Far better
N/A 
Slightly better
 
TD
N/A
N/A
Poor
 
Puncture Strength
Better
N/A
Poor
 

 

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