Common types and applications of cosmetic packaging bags

Composite packaging bags are made by laminating plastic films with different properties together using special adhesives and heat sealing to overcome the inherent defects of single films. Composite packaging bags have a wide range of applications. Today, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will explain the common types and application ranges of cosmetic packaging bags.

I. Common Types of Cosmetic Packaging Bags

1. Three-side sealed packaging bags

This is the most widely used composite packaging bag and the main packaging method for disposable daily chemical products. It is widely used in the packaging of detergents, shampoos, and cosmetics.

2. Irregularly shaped packaging bags

Breaking through traditional shapes, companies can freely design the shape of product packaging, which is more conducive to corporate product promotion. Irregularly shaped packaging bags can make products stand out and are widely used in disposable packaging and promotional packaging for various daily chemical products.

3. Spouted liquid stand-up pouches

This type of spouted liquid stand-up pouch combines the advantages of plastic containers and flexible packaging. , It is not only lightweight and environmentally friendly, but also easy to pour, easy to fill, can be resealed, and looks good on shelves. , It breaks the limitation that flexible packaging can only be used as supplementary packaging and disposable packaging for bottles. This stand-up pouch has two types of spouts: oblique and straight. The oblique spout is welded to the corner. , Generally convenient 300mL Above large-capacity packaging. The straight spout is welded to the top. , Generally used for small-capacity packaging. Imitation spout liquid stand-up pouches have a spout-like shape at the corner of the bag, making it easy to pour and fill. It is an improved form of supplementary and disposable packaging. In addition, there are irregularly shaped stand-up pouches that are easy to pour.

4. Reclosable zipper bags

Reclosable zipper bag packaging has opened up a new fashion in daily chemical packaging, especially in the field of clothing packaging. This packaging form has rapidly penetrated the market due to its good sealing performance and reusable opening features. More and more cosmetic packaging now uses reclosable zipper bags, which greatly improves product usability and production efficiency.

II. Commonly Used Material Structures for Cosmetic Packaging Bags

Common structures of composite packaging bags include paper/plastic composite, plastic / plastic composite, aluminum / plastic composite, etc.

The number of composite substrate layers can be two, three, four, five, or even more.

Two layers:

PET/PE,

PET/CPP,

OPP/CPP,

OPP/PE,

BOPA/CPP,

BOPA/PE,

PET/VMCPP,

OPP/VMCPP;

Three layers:

PET/BOPA/PE,

PET/BOPA/CPP,

PET/AL/PE,

PET/AL/CPP,

OPP/AL/PE,

PET/VMCPP/PE,

OPP/VMPET/PE,

Paper/AL/PE;

Four layers:

PET/AL/BOPA/PE,

PET/AL/PET/PE,

BOPA/AL/BOPA/PE,

PET/MPET/PE/EVA;

Five layers:

PET/AL/PET/AL/PE,

PET/AL/BOPA/AL/PE,

PET/PE/AL/EVA/PE, etc.

The main functions of each layer are:

Outer layer (strength support layer): Provides protection, framework, and printing decoration (PET, BOPP ，paper);

Middle layer (functional layer): Generally provides barrier properties (AL, MPET 、 BOPA );

Inner layer (heat-sealing layer): Generally provides heat-sealing properties (LLDPE, LDPE, CPP)

In practical applications, if the physical properties required by the product are not too strict, the structure may only be the outer and inner layers. For example, cosmetic bags usually require excellent chemical resistance and good barrier properties. Commonly used structures include: PET/AL/PE, OPP/AL/PE、PET/AL/PET/PE etc.

Composite packaging bags can be used for food packaging, hardware product packaging, electronic products, daily necessities packaging, clothing packaging, etc. They have one thing in common: they all require color printing on the plastic film, and food packaging also requires multi-layer composite or vacuum aluminum plating processes. Therefore, the surface free energy and wettability of the plastic film must be high to facilitate the firm adhesion of printing inks, adhesives, or aluminum plating layers to the plastic film; during the production winding and high-speed packaging of plastic films, the film surface requires a certain degree of frictional properties to prevent film adhesion or slippage; when used for packaging electrical and electronic products, the film is required to have certain anti-static properties, etc.

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