Ningbo Jiusheng Bags Co., Ltd.

PVC Cosmetic Bag Wholesale

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Ningbo Jiusheng Bags Co., Ltd.

Ningbo Jiusheng Bags Co., Ltd.

As China PVC Cosmetic Bag Manufacturers and PVC Cosmetic Bag Suppliers, Our company was established in 1996, with a plant area of ​​5000m². The company is located in the beautiful Hangzhou Bay. The opening of the Hangzhou Bay Cross-sea Bridge provides customers with a more convenient transportation environment. The company is a large-scale luggage enterprise integrating R&D and production. The company has specialized technical personnel and complete equipment, equipped with 4 fully automatic unloading machines, 6 computer cars, and more than 30 other advanced equipment at home and abroad. It adopts an ISO9001 quality management system and produces various bags, mainly photography bags, computer bags, cosmetic bags, men's and women's handbags, shoulder bags, travel bags, shopping bags, etc. The products are exported to more than ten countries in Europe, America, and Southeast Asia. The company has many years of production history, rich experience, strong technical force, and reliable product quality. It is already a well-known enterprise in Cixi City.
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The density of PVC cosmetic bag materials is the core of waterproof performance


As a synthetic polymer material, polyvinyl chloride is widely used in the production of various industrial and consumer products with its good physical and chemical properties. The molecular structure of PVC materials is compact and non-porous, which can effectively block the penetration of water and other liquids. This high density gives PVC materials excellent waterproof performance, which is the fundamental reason for its wide application in the field of cosmetic bags.
Molecular structure and waterproofness of PVC materials
The molecules of PVC materials are formed by polymerization of vinyl chloride monomers, and their molecular structure shows the characteristics of linear polymerization. In the process of linear polymerization, the molecular chains are tightly bound by van der Waals forces and dipole interactions to form a highly dense material. This dense structure makes it difficult for water molecules to penetrate through the gaps between molecules, thereby achieving a waterproof effect.
In the industry, the water absorption rate of PVC is usually less than 0.1%, which means that it absorbs almost no water when it comes into contact with water. This feature is particularly suitable for the production of cosmetic bags, because cosmetic bags often need to contact liquid cosmetics or be exposed to humid environments, and low water absorption ensures that the items in the bag are always dry.
Sealing design of PVC cosmetic bags
In addition to the density of the material itself, Ningbo Jiusheng Bags Co., Ltd. has also invested a lot of energy in the design of PVC cosmetic bags to ensure the overall waterproof performance of the product. The company has adopted a waterproof sealing design on the zippers, seams and edge treatment of the cosmetic bags.
For example, waterproof zippers are an important component in PVC cosmetic bags, which can effectively block the entry of moisture when zipped. The company uses high-quality waterproof zippers and uses professional assembly processes to ensure that each zipper can be used smoothly and provide reliable waterproof protection when closed.
On the seams, the company uses high-density sewing technology to ensure that the gaps between the seams are as small as possible, thereby reducing the risk of moisture penetration. In addition, the seams are usually sealed twice, such as using waterproof tape or heat sealing process, to further enhance the waterproof effect.