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CN-122011549-A - Self-release master batch, preparation method thereof, printable self-release layer and self-release film

CN122011549ACN 122011549 ACN122011549 ACN 122011549ACN-122011549-A

Abstract

The invention relates to a self-release master batch and a preparation method thereof, a printable self-release layer and a self-release film, wherein the self-release master batch comprises polyethylene materials, silicone, silicon dioxide and erucamide. Compared with the three-layer self-release adhesive label film (isolation film-adhesive layer-printing base film) in the prior art, the self-release layer can realize release effect and printing effect, reduce the layer number of the film, greatly reduce the production cost, realize the printing function of the self-release layer by utilizing the modified self-release master batch, and solve the problem that the release layer cannot be printed due to low surface polarity in the prior art.

Inventors

  • SU RUNHONG

Assignees

  • 湖南优珀斯新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260210

Claims (10)

  1. 1. The self-release master batch is characterized by comprising a polyethylene material, silicone, silicon dioxide and erucamide.
  2. 2. The self-releasing master batch according to claim 1, wherein the mass ratio of the silica to the erucamide is (4-6): 1, and/or The weight percentage of the polyethylene material is 50% -60%, the weight percentage of the silicone is 10% -20%, the weight percentage of the silicon dioxide is 6% -8%, and the weight percentage of the erucamide is 1% -2%.
  3. 3. The self-releasing master batch according to claim 1 or 2, wherein the polyethylene material comprises an ethylene-butyl acrylate copolymer, a high density polyethylene, a linear low density polyethylene.
  4. 4. A method for preparing a self-release master batch, which is used for preparing the self-release master batch according to any one of claims 1-3, and is characterized in that polyethylene material, silicone, silicon dioxide and erucamide are extruded according to a preset proportion to obtain the self-release master batch.
  5. 5. The method of manufacturing according to claim 4, further comprising: Pressing the silicon dioxide and erucamide according to a preset proportion to obtain particles with uniform particle size; extruding polyethylene material, silicone and particles according to a preset proportion to obtain the self-release master batch.
  6. 6. A printable self-release layer, comprising self-release master batch and polyethylene material; The self-release master batch is the self-release master batch according to any one of claims 1 to 3 or the self-release master batch prepared by the preparation method according to any one of claims 4 to 5.
  7. 7. The self-release layer according to claim 6, wherein the self-release master batch is used in an amount of 5% -8% and the polyethylene material is used in an amount of 92% -95% by weight.
  8. 8. The self-releasing layer of claim 6 or 7 wherein the polyethylene material comprises high density polyethylene, linear low density polyethylene.
  9. 9. The self-releasing layer of claim 8 wherein the amount of high density polyethylene is greater than the amount of linear low density polyethylene in weight percent.
  10. 10. A printable self-releasing film which comprises a film body, characterized by comprising the following steps: the self-releasing layer according to any one of claims 6 to 9; and the adhesive layer is arranged on one side of the self-release layer.

Description

Self-release master batch, preparation method thereof, printable self-release layer and self-release film Technical Field The invention relates to the technical field of release films, in particular to a self-release master batch, a preparation method thereof, a printable self-release layer and a self-release film. Background The self-adhesive label film is used as an identification carrier widely applied to the fields of food packaging, logistics identification, daily chemicals, electronic devices and the like, has the core functions of realizing convenient and quick adhesion, clear identification and stable attachment, and becomes an indispensable base material in modern production and life. Currently, a three-layer composite structure design is generally adopted for a main-stream self-adhesive label film in the industry, and an isolating film (also called a release film), a pressure-sensitive adhesive layer and a printing base film are sequentially arranged from top to bottom, so that the use requirements of the label are met by dividing the work of each layer into clear layers and mutually matching. The isolating film has the core functions of providing temporary protection for the pressure-sensitive adhesive layer, reducing the surface viscosity of the adhesive layer, ensuring that the label can be smoothly peeled off from the substrate before use, avoiding the adhesion, pollution or failure of the adhesive layer, ensuring that the label can be firmly attached to the surface of an object to be attached after being peeled off by the pressure-sensitive adhesive layer, and providing an adapting substrate for printing identification information such as characters, patterns and the like by using the printing base film as an information bearing layer, wherein the adhesive layer has good ink adhesion, flatness and mechanical strength. However, in the actual production and application process of the adhesive label film with the traditional three-layer structure, a plurality of technical defects and application limitations which are difficult to avoid exist, and the improvement of the production efficiency and the optimization of the cost are seriously restricted. On one hand, the three-layer structure needs to adopt a plurality of composite processes to realize the lamination of each layer, so that the consumption of raw materials such as an isolating film, an adhesive and the like is increased, the material cost is directly increased, a plurality of sets of composite processing equipment is also required to be equipped, the production flow is prolonged, the process control difficulty is improved, parameters such as tension control, thickness uniformity adjustment, interface bonding stability and the like in the lamination process of each layer are precisely controlled, otherwise, quality problems such as layering, warping, adhesive layer edge overflow and the like are easy to occur, the product percent of pass is reduced, and the production cost is further increased. On the other hand, the interlayer suitability requirement of the three-layer structure is higher, specific compatibility needs to be matched among the isolation films, the printing base films and the adhesive layers of different materials, the complexity of raw material type selection and the supply chain management cost are increased, and the low-cost and high-efficiency large-scale production requirement is difficult to adapt. In the prior art, the isolating film is mostly prepared from polyolefin materials such as Polyethylene (PE), polypropylene (PP) and the like, the polarity of the surface of the material is extremely low, the surface energy is small, although an excellent release effect can be realized, excessive adhesion with a pressure-sensitive adhesive layer is avoided, the core technical problems are brought, namely, the surface of the isolating film with low polarity cannot effectively adsorb ink, the adhesive force of the ink is extremely poor, the printed characters and patterns are easy to fall off, blur, the edge is not clear and the like, and the display requirement of identification information cannot be met. Therefore, an additional layer of printing base film is required to be arranged in the industry and is specially used for bearing printing information, which is also a core reason for the formation of the traditional three-layer structure, namely, the isolating film only bears the release function, and the printing function is required to be realized by depending on the independent printing base film, so that structural redundancy is caused. In order to solve the problems, the industry tries to improve the printing performance of the isolating film by a surface modification technology, such as plasma modification, coating modification and the like, but the method can damage the release characteristic of the surface of the isolating film, so that the adhesive layer and the isolating film cannot be smoothly separated and the