Butt Joint Technology of Aluminum-plastic Composite Tube of Cosmetics

The aluminum-plastic composite tube is spliced by plastic and aluminum. After a certain composite method, it is made into a composite sheet, and then processed into a tubular packaging product by a special pipe-making machine. It is an updated product of the all-aluminum tube. It is mainly used for small-capacity sealed packaging of semi-solid (paste, dew, colloid). At present, in the market, the new aluminum-plastic composite tube has begun to adopt the butt joint process, which has undergone considerable changes compared with the traditional 45°miter joint process.

 Principle of The Butt Joint Process

The trimmed edges of the inner layer of the sheet are butt welded together with zero overlap.

Then weld and add a transparent reinforcement tape to achieve the required high enough mechanical strength

The Effect of The Butt Joint Process

Burst strength: 5 bar
Drop performance: 1.8 m/ 3 times
Tensile strength: 60 N

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Advantages of The Butt Joint Process (Compared to 45°Miter Joint Process)

a. Safer:

  • The inner layer has a reinforced belt to ensure sufficient strength.
  • The introduction of high-temperature materials makes the material stronger.

b. Printing Is More Comprehensive:

  • 360°printing, the design is more complete.
  • Visualization of quality is more prominent.
  • Unlimited creative freedom.
  • Provide innovative space for graphic design and tactile experience.
  • No significant increase in cost.
  • Can be applied on multi-layer barrier structures.

c. More Options in Appearance:

  • Surface material is different.
  • High gloss, natural effect can be achieved.

Application of New Aluminum-plastic Composite Tube

Aluminum-plastic composite tubes are mainly used for packaging cosmetics that require high hygiene and barrier properties. The barrier layer is generally aluminum foil, and its barrier properties depend on the pinhole degree of the aluminum foil. With the continuous improvement of technology, the thickness of the aluminum foil barrier layer in the aluminum-plastic composite tube has been reduced from the traditional 40 μm to 12 μm, or even 9 μm, which greatly saves resources.