Silica gel lettering film

Abstract

The utility model relates to a silica gel lettering film which comprises a bottom layer, a material layer, a bonding layer and a hot melt adhesive layer, the bottom layer, the material layer, the bonding layer and the hot melt adhesive layer are sequentially compounded, the bottom layer comprises a PET film layer, a back coating layer and a double-layer release layer, and the back coating layer, the PET film layer and the double-layer release layer are sequentially connected. According to the silica gel lettering film, five different surface layers including the bottom layer, the material layer, the bonding layer and the hot melt adhesive layer are adopted, the operable temperature can be controlled within 100 DEG C, and compared with a traditional lettering film needing the baking temperature of 140 DEG C, the energy consumption problem in industrial production can be reduced, and safety accidents are reduced to a certain extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal transfer, and in particular relates to a silicone lettering film. Background Art

[0002] Nowadays, thermal transfer is widely used in clothing decoration patterns. Traditional lettering films generally have a series of service life problems, such as yellowing and hardening of patterns, reduced elasticity and toughness as they are used for a long time, and fading and discoloration after repeated washing, which affects the user experience. Therefore, a product with stable performance that can meet customer needs is urgently needed. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a silicone engraving film which is not easy to deform, expand or crack, and can extend the service life of the product.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a silicone engraving film, including a base layer, a material layer, a bonding layer and a hot-melt adhesive layer, the base layer, the material layer, the bonding layer and the hot-melt adhesive layer are compounded in sequence, the base layer includes a PET film layer, a back coating layer and a double-layer release layer, and the back coating layer, the PET film layer and the double-layer release layer are connected in sequence.

[0005] Furthermore, the material layer is a silicone coating containing color paste.

[0006] Furthermore, the hot melt adhesive layer is a mixture of TPU hot melt adhesive and PES hot melt adhesive in a ratio of 1:1 to 1:2.

[0007] Furthermore, the bonding layer is modified silica gel.

[0008] Furthermore, an intermediate barrier layer is provided between the bonding layer and the hot melt adhesive layer.

[0009] Furthermore, the bonding layer is a mixture of modified silica gel and color paste.

[0010] Furthermore, the lower surface of the material layer and the upper surface of the intermediate barrier layer are wavy curved surfaces.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The silicone engraving film of the utility model adopts five different surface layers, namely, the bottom layer, the material layer, the bonding layer and the hot-melt adhesive layer. The operating temperature can be controlled within 100°C. Compared with the traditional engraving film which requires a high temperature of 140°C for baking, it can reduce the energy consumption problem in industrial production and reduce safety accidents to a certain extent.

[0013] 2. The material layer is a silicone coating, the bonding layer is modified silicone, and the material layer and the bonding layer are made of silicone. They have stable physical and chemical properties and are not easy to deform, expand, or crack, which can extend the service life of the product. They are non-toxic and odorless, and there is no need to worry about the volatilization of toxic substances after the finished product is made, which ensures personal health and has good insulation properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of a silicone engraving film of the utility model;

[0015] Figure 2 It is a schematic cross-sectional structure diagram of the utility model in which the lower surface of the material layer and the upper surface of the barrier layer are wavy curved surfaces.

[0016] Markings in the figure: 1, bottom layer; 11, PET film layer; 12, back coating layer; 13, double-layer release layer; 2, material layer; 3, adhesive layer; 4, hot melt adhesive layer; 5, middle barrier layer. DETAILED DESCRIPTION

[0017] In order to make the above features and advantages of the present invention more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0018] like Figure 1-2 As shown, this embodiment provides a silicone engraving film, including a bottom layer 1, a material layer 2, an adhesive layer 3 and a hot melt adhesive layer 4.

[0019] The bottom layer 1, material layer 2, bonding layer 3 and hot melt adhesive layer 4 are compounded in sequence, and the material layer 2 is a silicone coating containing a color paste. The bonding layer is a modified silicone. At a certain temperature (75 degrees Celsius-85 degrees Celsius, 80 degrees Celsius is used in this solution), the interface bonding is formed between the material layer 2 and the hot melt adhesive layer through the catalytic action of the platinum vulcanizer. Specifically, the bonding layer 3 is a mixture of modified silicone and color paste. The corresponding special color paste is added to the bonding layer to enhance the overall color richness of the silicone lettering film and solve the problem of color transparency after thermal transfer.

[0020] The hot melt adhesive layer 4 is a mixture of TPU hot melt adhesive and PES hot melt adhesive in a ratio of 1:1 to 1:2. With this arrangement, TPU hot melt adhesive particles and PES hot melt adhesive particles, when used alone, have the problems of low bonding strength and poor softness of the lettering film. After being mixed in proportion, the overall bonding strength and softness can be improved, which meets the knife engraving requirements of most household engraving machines today. An intermediate barrier layer 5 is provided between the adhesive layer 3 and the hot melt adhesive layer 4, so that the TPU and PES hot melt adhesives will not affect the platinum vulcanizer in the silicone, causing it to be unable to solidify.

[0021] Preferably, the lower surface of the material layer 2 and the upper surface of the intermediate barrier layer 5 are wavy curved surfaces, which increase the contact area between the material layer 2 and the bonding layer 3 and between the intermediate barrier layer 5 and the bonding layer 3, thereby improving the bonding strength.

[0022] The bottom layer 1 includes a PET film layer 11, a back coating layer 12 and a double-layer release layer 13, and the back coating layer 12, the PET film layer 11 and the double-layer release layer 13 are connected in sequence.

[0023] Working principle: During the production, firstly, a casting machine is used to cast TPU and PES mixed hot melt adhesive in a certain proportion on a PP pearl film as a substrate to obtain a PP pearl film with a hot melt adhesive layer 4; then, a coating machine is used to scrape an intermediate barrier layer 5 on the PP pearl film with a hot melt adhesive layer to obtain a first pre-finished product; then, a coating machine is used to scrape a PET film layer 11 coated with a back coating layer 12 and a double-layer release layer 13 as a substrate (bottom layer 1) on the release layer in a tunnel oven environment at 100°C. A second pre-finished product is obtained by using a silicone layer (material layer 2) of a color paste; then, a coating machine is used to scrape an adhesive layer on the second pre-finished product at room temperature, and wet-laminate it with the first pre-finished product to obtain a silicone lettering film pre-finished product; then, the silicone lettering film pre-finished product is placed in an environment of 80°C and baked for 4 hours to completely cure the adhesive layer to obtain a silicone lettering film with a PP pearlescent film attached thereto; finally, a stripping machine is used to peel off the PP pearlescent film of the silicone lettering film with a PP pearlescent film attached thereto to obtain a finished silicone lettering film.

[0024] The above shows and describes the basic principles and main features of the invention and the advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. A silicone engraving film, characterized in that : It includes a bottom layer, a material layer, a bonding layer and a hot melt adhesive layer, and the bottom layer, the material layer, the bonding layer and the hot melt adhesive layer are compounded in sequence. The bottom layer includes a PET film layer, a back coating layer and a double-layer release layer, and the back coating layer, the PET film layer and the double-layer release layer are connected in sequence.

2. The silicone engraving film according to claim 1, characterized in that: The material layer is a silicone coating containing color paste.

3. The silicone engraving film according to claim 1, characterized in that: The bonding layer is modified silica gel.

4. The silicone engraving film according to claim 3, characterized in that: An intermediate barrier layer is arranged between the bonding layer and the hot melt adhesive layer.

5. The silicone engraving film according to claim 4, characterized in that: The lower surface of the material layer and the upper surface of the middle barrier layer are wavy curved surfaces.

Images