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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（2）

4. Biscuit packaging
Packaging requirements: good barrier properties, strong light shielding, oil resistance, high strength, odorless and tasteless, and the packaging is scratch resistant.
Design Structure: BOPP/EXPE/VMPET/EXPE/S-CPP
Design reason: BOPP has good rigidity, good printability, and low cost.
VMPET has good barrier properties, light and oxygen resistance, and water resistance.
S-CPP has good low-temperature heat sealing performance and oil resistance.

5. Milk powder packaging
Packaging requirements: Long shelf life, fragrance and taste preservation, oxidation and deterioration prevention, moisture absorption and agglomeration prevention.
Design Structure: BOPP/VMPET/S-PE
Design reason: BOPP has good printability, gloss, strength, and moderate price.
VMPET has good barrier properties, light avoidance, good toughness, and a metallic luster. It is best to use reinforced PET aluminum plating with a thick AL layer.
S-PE has good anti pollution sealing performance and low-temperature heat sealing performance.

6. Green tea packaging
Packaging requirements: Anti spoilage, anti discoloration, and anti taste, which means preventing the oxidation of protein, chlorophyll, catechins, and vitamin C contained in green tea.
Design Structure: BOPP/AL/PE, BOPP/VMPET/PE, KPET/PE

Design reason: AL foil, VMPET, and KPET are all materials with excellent barrier properties, providing good resistance to oxygen, water vapor, and odors. AK foil and VMPET also have excellent light shielding properties. The product price is moderate.

7. Edible oil
Packaging requirements: Anti oxidative deterioration, good mechanical strength, high burst strength, high tear strength, oil resistance, high gloss, transparency
Design Structure: PET/AD/PA/AD/PE, PET/PE, PE/EVA/PVDC/EVA/PE, PE/EPE

Design reason: PA, PET, PVDC have good oil resistance and high barrier properties. PA, PET, and PE have high strength, and the inner layer of PE is made of special PE, which has good resistance to sealing pollution and high sealing performance.

Pre

Structural Design of 15 Types of Plastic Packaging Bags（3）

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

Pre

Structural Design of 15 Types of Plastic Packaging Bags（3）

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

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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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