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Qingdao SINOY Packaging Co., Ltd. a production enterprise specializing in plastic flexible packaging (development, printing, compounding, slitting, bag making, research and development of new plastic materials)

2025

Structural Design of 15 Types of Plastic Packaging Bags（1）

1. Steaming and cooking packaging bag
Packaging requirements: Used for packaging meat, poultry, etc., it is required that the packaging has good barrier properties, is resistant to bone hole breakage, and does not break, crack, shrink, or have any odor under cooking conditions.

Design Structure:
Transparent category: BOPA/CPP, PET/CPP, PET/BOPA/CPP, BOPA/PVDC/CPP
PET/PVDC/CPP，GL-PET/BOPA/CPP
Aluminum foil: PET/AL/CPP, PA/AL/CPP
PET/PA/AL/CPP，PET/AL/PA/CPP

Design Reason:

PET: high temperature resistance, good rigidity, good printability, and high strength.
PA: High temperature resistance, high strength, flexibility, good barrier properties, and puncture resistance.
AL: * Excellent barrier properties, high temperature resistance.
CPP: High temperature cooking grade, good heat sealing, non-toxic and odorless.
PVDC: High temperature resistant barrier material.
GL-PET: Ceramic vapor deposition film with good barrier properties and microwave transmission.
For selecting the appropriate structure for specific products, transparent bags are mostly used for steaming, while AL foil bags can be used for ultra-high temperature steaming.

2. Puffed snack food
Packaging requirements: Oxygen and water resistance, light avoidance, oil resistance, fragrance retention, scratch resistant appearance, bright colors, and low cost.
Design Structure: BOPP/VMCPP
Design reason: Both BOPP and VMCPP are scratch resistant, BOPP has good printability and high glossiness. VMCPP has good barrier properties, retaining fragrance and moisture. CPP also has good oil resistance.

3. Big sauce packaging bag

Packaging requirements: odorless and tasteless, low temperature sealing, anti sealing pollution, good barrier properties, moderate price.
Design Structure: KPA/S-PE
Design reason: KPA has excellent barrier properties, strong toughness, high fastness when combined with PE, is not easily broken, and has good printability. Modified PE is a variety of PE blends (co extruded) with low heat sealing temperature and strong resistance to sealing contamination.

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SINOY Packaging Inc.

QINGDAO SINOY PACKAGING CO LTD. is a production enterprise specializing in plastic flexible packaging solutions supplier and (development, printing, compounding, slitting, bag making, research and development of new plastic materials).

Business location

Factory Address: No. 506, Guangzhou North Road, Jiaozhou City, Qingdao
Office Address: 3-1-20F, No. 9, Zhangzhou Second Road, Shinan District, Qingdao

Mobile: +86 13361260191 (same ID as WeChat, WhatsAPP )
Fax: 0532-85817935 85660077

Phone: +86 532 80932003 80932052 80932060 80932028
Email: bai@sinoy.cn

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