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Plastic bottle printing process

Published on:

2021-09-15

To help you better understand the printing process requirements of plastic bottles

Plastic bottle printing process

The material of the plastic bottles is usually PP, PE material, AS, ABS, acrylic, PET, etc.

At present, the production process of cosmetic plastic bottles mainly includes injection molding and blow molding. According to different molding methods and design requirements, choose different plastic materials. Materials suitable for injection molding mainly include PE, PP, PS, ABS, etc. According to the manufacturing method of the preform before blow molding, the blow molding process can be divided into extrusion blow molding and injection blow molding. The materials suitable for extrusion blow molding are mainly PE, PVC, PP, etc., and the materials suitable for injection blow molding are mainly PET, etc. The caps of cosmetic plastic bottles are generally injection molding, and some plastic bottles with a mouth diameter smaller than the body diameter are generally blow molding. PET blow-molding bottles are the most common in the market.

1. Silkscreen

There are ordinary ink and UV ink for silk screen printing. UV inks have better effects on gloss and three-dimensional. During production, the color should be confirmed by printing first, and the screen printing effect will vary according to different materials.

At present, plastic bottle screen printing generally uses UV ink, and its main components are: photocurable resin (acrylic resin), diluent monomer,

photoinitiator, pigment and auxiliary (including lubricant, thickener, filler), accelerators, etc.). Screen printing ink for cosmetic plastic bottle printing requires high gloss, good saturation, fast curing, good adhesion, good flexibility, low odor, good surface resistance, etc. The fluidity of the ink is generally 30-50mm.
Since domestic UV inks need to be improved in adhesion fastness and adaptability, imported screen printing inks are more popular with screen printing manufacturers.

2. Hot stamping

Hot stamping-: a thin layer of paper is printed on it, so there is no embossing or silk screen printing. The effect of Hot stamping is different from that of printing gold and silver powder. Hard materials and smooth surfaces are more suitable for hot stamping. But with soft materials is easy to fall off and not durable. And the gloss of hot stamping is better than that of printing gold and silver.

It is best, not to hot stamp directly on PE and PP materials. Need to be thermal-transfer printing and then hot stamping unless there is good hot stamping paper.

3. Water transfer printing

Water transfer printing: It is an irregular printing process carried out in the water, the printed lines are inconsistent, and the price is more expensive.

4. Thermal transfer printing

Thermal transfer printing: It is mostly used for products with large quantities and complex printing. It can attach a layer of film to the surface, and the price is slightly more expensive.

5. Offset printing

Offset printing: It is mostly used for aluminum-plastic hoses and all-plastic hoses. When printing white on colored hoses, screen printing must be used, because the offset printing will have the background color showing through, and sometimes a layer of bright film or sub-film will be attached to the surface of the hose.