01 Cooked Food Packaging Bags
Packaging Requirements: Used for packaging meat, poultry, etc. The packaging should have good barrier properties, be resistant to puncture by bones, and remain intact, non - cracked, non - shrinking, and odor - free during sterilization under cooking conditions.
Design Structure:
Transparent Types: BOPA/CPP, PET/CPP, PET/BOPA/CPP, BOPA/PVDC/CPP, PET/PVDC/CPP, GL - PET/BOPA/CPP.
Aluminum Foil Types: PET/AL/CPP, PA/AL/CPP, PET/PA/AL/CPP, PET/AL/PA/CPP.
Design Rationale:
PET: High - temperature resistant, good rigidity, excellent printability, and high strength.
PA: High - temperature resistant, high strength, good flexibility, good barrier properties, and puncture - resistant.
AL: Offers the best barrier properties and is high - temperature resistant.
CPP: It is of high - temperature - resistant cooking grade, with good heat - sealing properties and is non - toxic and odorless.
PVDC: High - temperature - resistant barrier material.
GL - PET: Ceramic vapor - deposited film, with good barrier properties and microwave - permeable.
For specific products, an appropriate structure is selected. Transparent bags are mostly used for cooking, and AL foil bags can be used for ultra - high - temperature cooking.
02 Puffed Snack Food Packaging
Packaging Requirements: Oxygen - resistant, water - resistant, light - resistant, oil - resistant, aroma - retaining, with a stiff and smooth appearance, bright colors, and low cost.
Design Structure: BOPP/VMCPP
Design Rationale: Both BOPP and VMCPP are stiff and smooth. BOPP has good printability and high gloss. VMCPP has good barrier properties, retaining aroma and preventing moisture. CPP also has good oil resistance.
03 Soy Sauce Packaging Bags
Packaging Requirements: Odorless, good low - temperature sealing property, resistant to sealing contamination, good barrier properties, and moderately priced.
Design Structure: KPA/S - PE
Design Rationale: KPA has excellent barrier properties and high toughness. Its composite with PE has high adhesion strength, is not easy to break, and has good printability. Modified PE is a blend (co - extrusion) of multiple PEs, with a low heat - sealing temperature and strong resistance to sealing contamination.
04 Biscuit Packaging
Packaging Requirements: Good barrier properties, strong light - shielding, oil - resistant, high strength, odorless, and the packaging should be stiff.
Design Structure: BOPP/EXPE/VMPET/EXPE/S - CPP
Design Rationale: BOPP has good rigidity, good printability, and low cost. VMPET has good barrier properties, blocks light, oxygen, and water. S - CPP has good low - temperature heat - sealing properties and is oil - resistant.
05 Milk Powder Packaging
Packaging Requirements: Long shelf life, retains aroma and flavor, prevents oxidation and spoilage, and prevents moisture absorption and caking.
Design Structure: BOPP/VMPET/S - PE
Design Rationale: BOPP has good printability, good gloss, good strength, and a moderate price. VMPET has good barrier properties, blocks light, has good toughness, and it is better to use enhanced PET aluminized with a thick AL layer. S - PE has good anti - contamination sealing properties and low - temperature heat - sealing properties.
06 Green Tea Packaging
Packaging Requirements: Prevents spoilage, discoloration, and flavor change, that is, prevents the oxidation of proteins, chlorophylls, catechins, and vitamin C in green tea.
Design Structure: BOPP / AL / PE, BOPP / VMPET / PE, KPET / PE
Design Rationale: AL foil, VMPET, and KPET are all materials with excellent barrier properties, having good resistance to oxygen, water vapor, and odors. AL foil and VMPET also have excellent light - shielding properties. The product price is moderate.
07 Edible Oil Packaging
Packaging Requirements: Prevents oxidation and spoilage, has good mechanical strength, high burst resistance, high tear strength, oil - resistance, high gloss, and transparency.
Design Structure: PET/AD/PA/AD/PE, PET/PE, PE/EVA/PVDC/EVA/PE, PE/PEPE
Design Rationale: PA, PET, and PVDC have good oil - resistance and high barrier properties. PA, PET, and PE have high strength. The inner - layer PE is a special PE with good anti - sealing - contamination properties and high tightness.
08 Milk Film Packaging
Packaging Requirements: Good barrier properties, high burst resistance, light - shielding, good heat - sealing properties, and a moderate price.
Design Structure: White PE/White PE/Black PE
Design Rationale: The outer - layer PE has good gloss and high mechanical strength. The middle - layer PE bears the strength. The inner - layer serves as the heat - sealing layer and has light - shielding, barrier, and heat - sealing properties.
09 Ground Coffee Packaging
Packaging Requirements: Prevents water absorption, oxidation, withstands the hardening of the product after vacuum - pumping, and retains the volatile and easily oxidized aroma of coffee.
Design Structure: PET/PE/AL/PE, PA/VMPET/PE
Design Rationale: AL, PA, and VMPET have good barrier properties, blocking water and gas. PE has good heat - sealing properties.
10 Chocolate Packaging
Packaging Requirements: Good barrier properties, light - shielding, beautiful printing, and low - temperature heat - sealing.
Design Structure:For plain chocolate: Varnish/Ink/White BOPP/PVDC/Cold - seal Adhesive.
For nut chocolate: Varnish/Ink/VMPET/AD/BOPP/PVDC/Cold - seal Adhesive.
Design Rationale: PVDC and VMPET are both high - barrier materials. The cold - seal adhesive can be sealed at extremely low temperatures, and the heat does not affect the chocolate. Since nuts contain more oil and are prone to oxidation and spoilage, an oxygen - barrier layer is added to the structure.
11 Beverage Packaging Bags
Packaging Requirements: For acidic beverages with a pH < 4.5, pasteurization is required, and general barrier properties are needed. For neutral beverages with a pH > 4.5, sterilization is required, and high barrier properties are needed.
Design Structure:For acidic beverages: PET/PE (CPP), BOPA/PE (CPP), PET/VMPET/PE.
For neutral beverages: PET/AL/CPP, PET/AL/PA/CPP, PET/AL/PET/CPP, PA/AL/CPP.
Design Rationale: For acidic beverages, PET and PA can provide good barrier properties and are resistant to pasteurization. The acidity extends the shelf life. For neutral beverages, AL provides the best barrier properties, and PET and PA have high strength and are resistant to high - temperature sterilization.
12 Liquid Detergent Stand - Up Pouches
Packaging Requirements: High strength, impact - resistant, burst - resistant, good barrier properties, good rigidity for standing, resistant to stress cracking, and good sealing.
Design Structure:
1.For the body:BOPA/LLDPE; For the bottom: BOPA/LLDPE.
2.For the body: BOPA/Reinforced BOPP/LLDPE; For the bottom: BOPA/LLDPE.
3.For the body: PET/BOPA/Reinforced BOPP/LLDPE; For the bottom: BOPA/LLDPE.
Design Rationale: The above structures have good barrier properties and high material rigidity, suitable for stand - up pouches. The bottom has good flexibility for processing. The inner - layer is modified PE with good anti - sealing - contamination properties. Reinforced BOPP increases the mechanical strength of the material and enhances its barrier properties. PET improves the water - resistance and mechanical strength of the material.
13 Aseptic Packaging Lid Materials
Packaging Requirements: Maintain an aseptic state during packaging and use.
Design Structure: Coating/AL/Release Layer/MDPE/LDPE/EVA/Release Layer/PET.
Design Rationale: PET serves as an aseptic protective film and can be peeled off. When entering the aseptic packaging area, the PET is peeled off to expose the aseptic surface. The AL foil release layer is peeled off by customers when drinking. Drinking holes are pre - punched in the PE layer, and when the AL foil is peeled off, the drinking holes are exposed. AL foil is used for high - barrier purposes. MDPE has good rigidity and good thermal adhesion with the AL foil. LDPE is inexpensive. The VA content of the inner - layer EVA is 7% (VA > 14% is not allowed to directly contact food), and EVA has good low - temperature heat - sealing and anti - sealing - contamination properties.
14 Pesticide Packaging
Packaging Requirements: Since pesticides are highly toxic and pose a serious threat to human and environmental safety, the packaging is required to have high strength, good toughness, impact - resistance, drop - resistance, and good sealing.
Design Structure: BOPA/VMPET/S - CPP
Design Rationale: BOPA has good flexibility, puncture - resistance, high strength, and good printability. VMPET has high strength and good barrier properties, and enhanced and thickened coating materials can be used. S - CPP provides heat - sealing, barrier, and anti - corrosion properties, and ternary copolymer PP is used. Or multi - layer co - extruded CPP containing high - barrier EVOH and PA layers can be used.
15 Heavy - Duty Packaging Bags
Packaging Requirements: Heavy - duty packaging is used for packaging agricultural products such as rice and beans, and chemical products such as fertilizers. The main requirements are good toughness and necessary barrier properties.
Design Structure: PE/Plastic Fabric/PP, PE/Paper/PE/Plastic Fabric/PE, PE/PE
Design Rationale: PE provides sealing and good flexibility, is resistant to dropping. Plastic fabrics have high strength.
Post time: Feb-18-2025
