A benzene-free imaging layer for dark laser anodized aluminum and its preparation method

Abstract

The invention discloses a benzene-free imaging layer for dark laser anodized aluminum, which comprises the following components in parts by weight: 28.4-49 parts of acrylic resin, 3-7.2 parts of auxiliary resin, 2.4-4 parts of film-forming agent, 0.3-0.6 parts of leveling agent and 0.3-0.6 parts of defoamer; the acrylic resin includes methacrylic acid copolymer and aliphatic urethane acrylate. The acrylic resin of the present invention includes methacrylic acid copolymer and aliphatic urethane acrylate, and through the compounding of these two acrylic resins and auxiliary resins, the acid value of the resin system and the wettability of toner are adjusted, and the imaging layer is improved. Inclusive of toner, it can be used in the production of dark laser anodized aluminum products. The added film forming agent, leveling agent and defoaming agent can further improve the coating, molding and hot stamping performance of the imaging layer. The invention also provides a preparation method of the benzene-free imaging layer for dark laser anodized aluminum.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a benzene-free imaging layer for dark laser anodized aluminum and a preparation method thereof. Background technique [0002] Laser anodized aluminum is a new type of high-tech, high value-added packaging bronzing material. It has a strong metallic texture and colorful appearance, giving a unique visual impact. After hot stamping, it can beautify publicity and anti-counterfeiting functions. It is suitable for hot stamping coated paper, tipping paper, ink paper, plastic products, wood, leather, silk, linoleum, etc. It has been widely used in various tickets, credit cards, passports, banknotes, trademarks, tobacco and alcohol packaging and important publications, etc. field. Laser anodized aluminum is the product of the combination of ordinary anodized aluminum production technology, laser hologram molding technology, and chemical industry technology. It is s...

AI Technical Summary

Problems solved by technology

[0003] The coating of the imaging layer is the key to mold pressing to obtain exquisite laser effects. The colored anodized aluminum foil is to add toner to the imaging layer. The dark and special colored anodized aluminum foil has a high content of toner in the imaging layer (mostly more than 5%) Therefore, there are generally problems such as poor coating leveling appearance, poor moldability, and poor bonding fastness between the color layer and the aluminum layer, resulting in narrow limitations of hot stamping; in addition, due to the tolerance of the resin coating on the imaging layer Poor, in order to ensure the solubility and stability of the imaging resin in the coating, it is generally necessary to use a large amount of toluene as a solvent. Even if the layer containing toluene is dried after drying, there is still the problem of solvent residue in the end, which will cause the organic volatilization of printing raw materials The substance content exceeds the standard, and the use of toluene will also cause certain harm to the environment

However, if toluene is not used, the dispersion and dissolution of the prepared anodized aluminum color coating is insufficient, which will easily cause hue deviation and specks of anodized aluminum products.

Images