IMD-SPR in-mold injection inks

1 Introduction

3D Imaging's newly developed IMD-SPR in-mold injection ink is a single-component solvent-based ink. The ink formulation incorporates a special class of high temperature resistant thermoplastic resin, especially suitable for IMD applications involving PC sheets and resins.

2, the main features include :

Outstanding flexibility and formability

Excellent adhesion (printed substrates and injection molded resins - especially PC, PC/ABS and ABS resins)

Excellent heat resistance (refers to the entire process of injection molding)

3, the scope of application

Electrical control panel, mobile phone and so on.

Matrix (substrate)

PC sheet, PC compound blend material.

4, the main features and application parameters

Mesh

Standard and four-color, it is recommended to use 90-150T (230-380 mesh) polyester single wire mesh

Metallic inks are recommended to use a polyester monofilament of 77-120T (195-305 mesh).

Mesh direct emulsion film and capillary film (film) can be.

5, ink thinner

IMD-SPR is a higher viscosity ink that should be diluted to the proper viscosity before use. For 4-color and fine-pattern printing, 5-l0% IMD-SPR-425 slow-drying thinner is recommended. For standard four-color printing, use 15-15% IMD-SPR-425 thinner. In the printing process, the control of the viscosity of the ink is very important. Improper dilution (ink viscosity is too high or too low) can produce a "pinhole" effect, which can also cause poor leveling of the ink. When printing fine "phase inversion" graphics, "high viscosity" and "slow drying" are the characteristics that inks must possess. At this point in the IMD-SPR ink system can be introduced 5-15% IMD-SPR-430 slow-drying cream to meet the different printing requirements.
Scraper Use a polyurethane spatula with a Shore hardness of 70-85. The higher the hardness, the better the printing effect on fine lines. The lower the hardness, the more favorable it is to provide "high coverage" of printed products.

6, ink coverage

With 120T/300 mesh screen, 70-85 square meters can be printed per kilogram of ink.

7, other additives

(1) Drying

The IMD-SPR ink is dried by the mechanism of solvent evaporation. Under normal conditions, it takes 10-15 minutes for “contact without tackiness”. Before injection molding, it is necessary to remove the agent remaining in the print, and “Racy air drying” is not advisable because the method easily brings about the problem of solvent transfer (penetration) (ie, it remains in the printed product. The solvent is infiltrated or transferred to its adjacent substrate). For special drying, hot air drying with a good compressed air facility must be used. We recommend implementing the "two-step drying method" that is:

The first step (initial drying): 80°C, 60 seconds (dry drying on an in-line conveyor belt) or, 80°C, 180 seconds (box drying).

The second step (post-drying): In the range of 75-90 °C, box drying for 1-5 hours, the temperature of the heat-sensitive PC sheet, the temperature can not exceed 80 °C, otherwise there may be deformation. For pure PC resin sheet, the temperature can be raised to 115 °C, which significantly shortens the drying time. In this case, attention must be paid to the "registration" of registration. Inadvertently, it may affect the following operations (including molding, shearing, extrusion, etc.). It should be reminded that if you want to get the best heat resistance in the extrusion process, you must seriously deal with the post-drying. Post-drying will eliminate any residual solvent in the printed product. Residual solvents can create problems associated with "washout" during the extrusion process.

(2) Prepress testing

Prepress testing is the responsibility of all printing manufacturers. We recommend that users use sufficient time for trial printing and evaluation, and check the quality of their substrates (such as surface free energy, etc.) before printing.

package
Ink 1KG, 4KG, 20KG
Thinner 3KG, 16KG
safety

All IMD-SPR inks are produced from pigments that do not contain toxic heavy metals and meet EN-71 standards. (Kunshan Yimei Ink)