Photo-thermal color-changing plastic colorant particle

Abstract

The utility model belongs to the technical field of plastic colorants, and particularly relates to photo-thermal color-changing plastic colorant particles. The dye comprises a core-shell layer, a mixing layer and a dye core, the core-shell layer, the mixing layer and the dye core are arranged from outside to inside and are mixed and melted into a whole. According to the photo-thermal color-changing plastic colorant particle disclosed by the invention, the core-shell layer is formed on the surface of the dye particle which is easy to sense light and heat, so that the material properties of the dye particle can be prevented from being changed in the storage and transportation processes by adjusting the mechanical properties and the surface light-sensing and heat-sensing properties of the dye particle.

Description

Technical Field

[0001] This application belongs to the field of plastic colorant technology, specifically relating to a photothermal color-changing plastic colorant particle. Background Technology

[0002] Photochromic plastic colorants are plastic dyes that enable plastic products to automatically change color in response to the intensity of light and / or heat. Due to their photosensitive and / or heat-sensitive properties, photochromic plastic dyes are prone to changes in their dyeing properties during storage or transportation due to mechanical, thermal, or light effects. Utility Model Content

[0003] In view of this, this application provides a photothermal color-changing plastic colorant particle to solve all or part of the technical problems described in the background section of this application.

[0004] The innovative concept of this application is to change the mechanical properties and surface photosensitive and heat-sensitive properties of the dye particles by setting a coating layer on the photothermal color-changing plastic dye, so as to facilitate the storage and transportation of the photothermal color-changing plastic dye.

[0005] The solution provided in this application to solve its technical problem is as follows:

[0006] A photothermal color-changing plastic colorant particle, characterized in that it comprises a core-shell layer, a mixing layer, and a dye core; the core-shell layer, the mixing layer, and the dye core are arranged from the outside to the inside and are inter-layered and fused together.

[0007] The core-shell layer on the surface can increase the mechanical properties of dye particles, reduce the photosensitivity and / or thermosensitivity of the dye particle surface, and prevent the material properties of dye particles from changing during storage and transportation.

[0008] Preferably, the core and shell material can be common plastic fillers such as silicon dioxide or calcium carbonate.

[0009] Preferably, the colorant particles are spherical or cylindrical in shape.

[0010] Preferably, the thickness of the core-shell layer in the colorant particles does not exceed 1 / 5 of the diameter of the spherical particles.

[0011] Beneficial technical effects:

[0012] The photothermal color-changing plastic colorant particles disclosed in this application, by forming a core-shell layer on the surface of dye particles that are susceptible to photothermal and thermal sensitivities, can adjust the mechanical properties and surface photothermal and thermal sensitivities of the dye particles, thereby preventing changes in the material properties of the dye particles during storage and transportation.

[0013] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 Schematic diagram of the particle structure of photothermal color-changing plastic colorant;

[0015] Figure 2 : Figure 1 Enlarged view of the structure of part A in the middle;

[0016] Icon description:

[0017] 1-Core shell;

[0018] 2-Mixed layer;

[0019] 3-Dye core. Detailed Implementation

[0020] Please see Figure 1 and Figure 2 The photothermal color-changing plastic colorant particles provided in this application include a core-shell layer 1, a mixed layer 2, and a dye core 3; the core-shell layer 1, the mixed layer 2, and the dye core 3 are arranged from the outside to the inside and are inter-layered and fused together.

[0021] The dye particles can be spherical or cylindrical. The thickness of the core-shell layer 1 does not exceed 1 / 5 of the diameter of the spherical particles.

[0022] The photothermal color-changing plastic colorant particles provided in this application can be produced using various processes, such as thermoforming and migration enrichment.

[0023] The hot-melt coating method involves feeding molten dye and core-shell material into the main feed channel and core-shell channel of a twin-screw extruder, respectively, and then hot-melt coating the core-shell layer onto the surface of the dye substrate through extrusion molding. During the molding process, the main feed and core-shell material interpenetrate to form an intermediate mixed layer.

[0024] Migration enrichment refers to a technique that, by controlling processing conditions or material composition, causes core-shell materials blended in a plastic matrix to spontaneously migrate and enrich towards the surface during molding, forming a surface functionalized coating layer. Taking silica as the core-shell material as an example, the core-shell material is first modified to reduce its compatibility with dye particles through hydrophobicity modification. Then, the core-shell material and dye particles are melt-blended and extruded using a twin-screw extruder. During extrusion molding, the core-shell material spontaneously migrates and enriches towards the surface of the dye particles, forming a surface core-shell layer (mainly silica), an intermediate mixed layer (including the core-shell material and dye), and an internal dye core (mainly dye).

[0025] Both the thermal melting coating method and the migration enrichment method are existing technologies in this field and will not be described in detail here.

[0026] Application and effect description:

[0027] When producing plastic products, the photothermal color-changing plastic colorant particles disclosed in this application are added to the main material of the product (such as ABS, PE, PA, etc.) at a certain proportion (e.g., 4%), then mixed and melted, and the plastic product is made by using a plastic molding mold (e.g., injection mold). The main dye material exerts its coloring and photosensitive and heat-sensitive properties in the product, while the core-shell material becomes the filler of the plastic product.

[0028] Because of the core-shell layer formed on the surface, the dye particles provided in this application can maintain the photothermal color-changing characteristics and avoid changes in material properties due to mechanical wear or photothermal environment during storage and transportation.

[0029] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. A photothermal color-changing plastic colorant particle, characterized in that: Includes a core-shell layer (1), a mixed layer (2), and a dye core (3); The core-shell layer (1), the mixed layer (2), and the dye core (3) are arranged from the outside to the inside and are inter-layered and fused together.

2. The photothermal color-changing plastic colorant particles according to claim 1, characterized in that: The photothermal color-changing plastic colorant particles are spherical or cylindrical.

3. The photothermal color-changing plastic colorant particles according to claim 2, characterized in that: The thickness of the core-shell layer (1) does not exceed 1 / 5 of the diameter of the spherical particle.

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