Silicon ink-jet film

Abstract

The utility model relates to the technical field of films, in particular to a silicon-based ink-jet film, which comprises a silicon-based ink-jet film body, and the silicon-based ink-jet film body comprises a bottom substrate layer for providing mechanical support, a middle silicon-based adsorption layer for improving ink adsorption uniformity, and a top surface treatment layer for waterproof and anti-ultraviolet functions. The silica gel sheet has the advantages of strong coating capability, strong tolerance and high positioning precision.

Description

Technical Field

[0001] This utility model relates to the field of film technology, specifically a silicon-based inkjet film. Background Technology

[0002] Inkjet film is a special coating material designed specifically for inkjet printing technology. It is usually made of plastic (such as PET, PVC) or paper substrates, and the surface is covered with an ink-absorbing layer to optimize ink adhesion and color performance. The organic resin coating commonly used in traditional inkjet films has three major technical pain points: (1) Insufficient interface bonding performance: poor coating adhesion, which easily leads to uncontrolled ink diffusion (accuracy deviation of ±15%).

[0003] (2) Environmental tolerance defects: UV radiation and humidity fluctuations (>85%RH) during outdoor use will cause significant fading (ΔE>5) and delamination failure;

[0004] (3) Environmental compliance risk: The residual PFOA content (>0.005%) of the fluorine-containing coating exceeds the RoHS directive limit.

[0005] Therefore, in view of the above problems, this technical solution designs a silicon-based inkjet film. Utility Model Content

[0006] The purpose of this invention is to provide a silicon-based inkjet film to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A silicon-based inkjet film includes a silicon-based inkjet film body, which includes a bottom substrate layer for providing mechanical support, a middle silicon-based adsorption layer for improving ink adsorption uniformity, and a top surface treatment layer for waterproof and UV-resistant functions.

[0009] The substrate layer is made of PET or PC transparent film with a thickness of H1: 0.2-1.0mm;

[0010] The silicon-based adsorption layer has a thickness of H2: 5-50μm and a uniformly distributed microporous structure on its surface. The silicon-based adsorption layer is made by curing a nano-silica dispersion with a siloxane-containing crosslinking agent. The microporous structure has a pore size of 0.5-2μm, the nano-silica dispersion has a particle size of 20-50nm, and the siloxane-containing crosslinking agent has a mass percentage of 5-15%.

[0011] The surface treatment layer has a thickness of H3: 5-20μm and uses a fluorosilicone copolymer coating.

[0012] Compared with the prior art, the beneficial effect of this utility model is that the ink droplet positioning error can be reduced by adopting a microporous structure;

[0013] Extended lifespan: Increased color stability in outdoor environments;

[0014] Environmental advantages: Silicon-based materials have a higher recyclability rate. Attached Figure Description

[0015] Figure 1 This is a partial structural diagram of a silicon-based inkjet film.

[0016] Figure 2 This is a schematic diagram of the internal unfolded partial structure of a silicon-based inkjet film.

[0017] Figure 3 This is a schematic diagram of a local micropore structure in a silicon-based inkjet film.

[0018] The film consists of: a silicon-based inkjet film body 10, a substrate layer 11, a silicon-based adsorption layer 12, a surface treatment layer 13, and a microporous structure 14. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-3 A silicon-based inkjet film includes a silicon-based inkjet film body 10, the silicon-based inkjet film body 10 including a bottom substrate layer 11 for providing mechanical support, a middle silicon-based adsorption layer 12 for improving ink adsorption uniformity, and a top surface treatment layer 13 for waterproof and UV-resistant functions.

[0024] The substrate layer 11 is made of PET or PC transparent film with a thickness of H1: 0.2-1.0mm;

[0025] The silicon-based adsorption layer 12 has a thickness of H2: 5-50μm and a uniformly distributed microporous structure 14 on its surface. The silicon-based adsorption layer 12 is made by curing a nano-silica dispersion with a siloxane-containing crosslinking agent. The microporous structure 14 has a pore size of 0.5-2μm, the nano-silica dispersion has a particle size of 20-50nm, and the siloxane-containing crosslinking agent has a mass percentage of 5-15%.

[0026] The surface treatment layer 13 has a thickness of H3: 5-20μm and is made of fluorosilicone copolymer coating.

[0027] Example 1: High-precision silicon-based inkjet film body 10 used in laboratory testing;

[0028] Raw material preparation: The substrate layer 11 is made of PET film; the nano-silica dispersion in the silicon-based adsorption layer 12 is made using Evonik... OX50 (a hydrophilic fumed silica produced by Evonik, belonging to...) One of the series of products), with a particle size of 30nm and a specific surface area of ​​50±15m². 2 / g;

[0029] Surface treatment layer 13 uses fluorooctyltriethoxysilane;

[0030] Preparation process: Coating of silicon-based adsorption layer 12:

[0031] The nano-silica dispersion and crosslinking agent were mixed at a mass ratio of 10:1, and ethanol solvent (solid content 25%) was added.

[0032] Ball milling dispersion for 2 hours (300 rpm, zirconia ball diameter 0.5 mm).

[0033] The coating was applied using a wire bar coating machine (Shanghai Modern Environment MTI MSK-AFA-III), with a wet film thickness of 100μm.

[0034] Stepped curing: Pre-baking at 80℃ for 5 minutes → Main curing at 120℃ for 10 minutes → Natural cooling to room temperature.

[0035] Surface treatment layer 13 treatment:

[0036] Impregnation treatment: Immerse in 0.5% fluocinyltriethoxysilane solution for 30 seconds, then dry at 60°C for 5 minutes.

[0037] Effect test:

[0038]

[0039] Example 2: Weather-resistant reinforced silicon inkjet film body 10 used in industrial production testing;

[0040] Substrate processing line:

[0041] Substrate: Substrate layer 11 uses PC film (Covestro) DE 1-4, thickness 0.8mm, UV absorber addition 0.3wt%)

[0042] Corona treatment: power 5kW, treatment speed 15m / min, dyne value ≥54mN / m

[0043] Silicon-based adsorption layer 12-roll coating line:

[0044] Coating machine: Nordson EDI Ultracoat TM The gap between the mold heads is 50μm.

[0045] Curing channel: Three-stage infrared heating (80℃ / 120℃ / 150℃), wind speed 3m / s

[0046] Surface treatment layer 13: Surface treatment line

[0047] Vacuum deposition equipment: 10 -2 Pa, silane vapor temperature 120℃.

[0048] Process parameters:

[0049]

[0050] Mass production testing data (sampling inspection):

[0051]

[0052] Through the above design, development and side view, it can be concluded that in the technical solution 10, by adopting a microporous structure, the ink droplet positioning error can be reduced by more than 40%;

[0053] Extended lifespan: Maintains color stability for >3 years in outdoor environments;

[0054] Environmental advantages: Silicon-based materials have a recyclability rate of up to 90%.

[0055] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A silicon-based inkjet film, characterized by, The silicon inkjet film body (10) includes a bottom substrate layer (11) for providing mechanical support, a middle silicon adsorption layer (12) for improving ink adsorption uniformity, and a top surface treatment layer (13) for waterproof and UV protection.

2. The silicon-based inkjet sheet according to claim 1, wherein The substrate layer (11) is made of PET or PC transparent film material with a thickness of H1: 0.2-1.0mm.

3. The silicon-based inkjet printing sheet according to claim 1, wherein The silicon-based adsorption layer (12) has a thickness of H2: 5-50μm and a uniformly distributed microporous structure (14) on its surface. The silicon-based adsorption layer (12) is made by curing nano-silica dispersion with a siloxane crosslinking agent.

4. The silicon-based inkjet sheet according to claim 3, wherein The microporous structure (14) has a pore size of 0.5-2 μm, the nano-silica dispersion has a particle size of 20-50 nm, and contains 5-15% by mass of siloxane crosslinking agent.

5. The silicon-based inkjet printing sheet according to claim 1, wherein The surface treatment layer (13) has a thickness of H3: 5-20μm and is coated with a fluorosilicone copolymer.

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