Laminated Polypropylene Bags & HDPE Laminated Bags: Quality Plastic Solutions

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Case of Plastic Lamination Bags

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Common Specification of Plastic Lamination Bags

Bag Material	Barrier Performance			Description
Bag Material	Air	Moisture	Light	Description
PET/PE	Medium	Medium	Low	Cheap and common use
PA/PE	Medium	High	Low	Puncture resistance
PET/PA/PE	Medium	Medium	Low	Enhanced barrier and strength
BOPP/CPP	Low	Medium	Low	Cheap, automatic packing machine use
OPP/PE	Low	Medium	Low	Cheap, automatic packing machine use

PE.

PE (polyethylene) has high heat sealing strength so it's generally used as heat sealing layer of laminated materials. Good resistance to oil, acid, alkali and chemicals and good cold and heat resistance

PET.

PET ( polyethylene terephthalate ) is a widely used printing material and cannot be used as a heat-sealing layer material.

PET has good transparency, resistance to low and high temperatures, melting point of 264°C, not easy to wrinkle when sealing, good flatness, especially suitable for automatic packaging machines.

OPP.

Oriented Polypropylene (OPP) is only stretched on TD direction.

Biaxially Oriented Polypropylene (BOPP) is stretched both on TD direction and MD direction

CPP.

Cast polypropylene (CPP) is a polypropylene film produced by flow-molding in the plastics industry. It's a non-stretched and non-oriented cast film.

PA.

PA (Nylon) has excellent tensile and puncture resistance, so it is often used for packaging vacuum and sharp-cornered items.

It has low temperature and high temperature resistance, can be used for packing frozen products and high-temperature steamed products.

Structure of Plastic Lamination Bags

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Outer Base Layer

The outer base layer mainly plays the role of aesthetics, printing and moisture barrier such as BOPP, PET.

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Middle Barrier Layer

The barrier layer mainly plays the role of barrier and light protection such as VMPET, AL, PA.

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Inner Heat Sealing Layer

The heat sealing layer is in direct contact with the packaged items, and plays the role of adaptability, permeability resistance, good heat sealing strength such as PE, CPP, VMCPP.

Technical Specification of 100 Microns PET/PE Plastic Lamination Bag

Properties	Test Method	Unit of Measure	Typical Valve
MVTR (Moisture Vapor Transmission Rate)	ASTM D8041	gms/100 sq.in. /24 hrs	0.33
OTR (Oxygen Transmission Rate)	ASTM-1434-66	cc/100 sq. in /24 hrs	7.3
Tensile MD	ASTM D-882	break Lbs	19
Tensile XMD	ASTM D-882	break Lbs	22
Tear MD	ASTM 689	break Lbs	48
Tear XMD	ASTM 689	break Lbs	48
Puncture	ASTM D2582-21	Lbs	12