Which resins improve the bonding of inks on HDPE?

Which resins improve the bonding of inks on HDPE Plastic surfaces?

The following resins are recommended to improve ink adhesion on HDPE (High Density Polyethylene) plastic frames:

1. Chlorinated polypropylene (CPP resin)

- Applicability: Chlorinated polypropylene is non-polar resins that are more compatible with HDPE, making them suitable for printing on non-polar substrates such as HDPE.

- Function: As a linker for inks, Chlorinated polypropylene provides good adhesion and printing effects.

Pic#A Strong bonding Printing ink on Plastic box

2. Polyurethane Resins (PU resin)

- Applicability: Polyurethane resins are polar resins and are usually used for printing on polar substrates such as PET and PA. However, in some cases, it can also be used for printing on HDPE by combining it with chlorinated polypropylene resins or by adding adhesion promoters specialized for PP and PE.

- Function: Polyurethane resins have good film-forming and dispersing properties, which can improve ink adhesion and color vividness.

Pic#B Test by glue tape for ink bonding power

3. Organic Silicone Resin

- Characteristics: Organic silicone resin has excellent chemical stability, high temperature resistance, abrasion resistance and chemical corrosion resistance.

- Function: When added to the ink, it can significantly improve the adhesion and printing accuracy of the ink, especially suitable for occasions with high requirements on printing quality.

4. Epoxy Resin

- Characteristics: Epoxy resin has good weather resistance, mechanical properties and chemical corrosion resistance, after curing the film formed by high hardness, strong adhesion.

- Function: Adding epoxy resin to the ink can improve the adhesion and hardness of the ink and make the print more durable.

5. Hydroxyl Resin

- Characteristics: Hydroxy resin is a water-soluble resin with good solubility and high adhesion.

- Function: Hydroxyl resin is able to react with other components in the ink to form compounds with high adhesion, thus improving the adhesion and coverage of the ink.

6. Thermoplastic Acrylic Resin

Thermoplastic acrylic resins are also one of iSuoChem's core products, but have been tested by customers and are not too effective. It is also being improved and upgraded, and better results have been achieved so far.

In practical application, it is necessary to select the appropriate resin to be added according to the specific material of the HDPE plastic frame, printing requirements and the formulation of the ink and other factors. At the same time, it is also necessary to pay attention to parameters such as the amount of resin added, the mixing ratio and the printing process to ensure that the best printing results are obtained.

In addition, in addition to adding the resin, the adhesion of the ink on the HDPE plastic frame can be further improved by improving the ink formulation, optimizing the printing process, and performing surface treatment (e.g. corona treatment) on the HDPE plastic frame.