Anti-static separator film and preparation method thereof

Abstract

The invention relates to the technical field of preparation of anti-static separator films, and particularly discloses an anti-static separator film and a preparation method thereof. The antistatic separator film is prepared from the following raw materials in percentage by mass: 75%-85% of a plastic raw material, 15%-25% of a polymer permanent antistatic agent and 0.01%-0.5% of a coloring agent. The preparation method comprises the following steps: S1, drying; s2, the plastic raw materials, the polymer permanent antistatic agent and the coloring agent are heated and mixed, and then homogenization treatment is carried out; s3, guiding into a double-screw extruder for melt extrusion molding, and then cooling to prepare an anti-static material sheet blank; s4, the anti-static material sheet blank is guided into a three-roller calender to be subjected to rolling forming, and an anti-static material sheet is obtained; and S5, cutting the anti-static material sheet to obtain the anti-static partition film. According to the anti-static partition film and the preparation method thereof, the anti-static partition film has a lasting anti-static effect, is relatively long in service life and is not influenced by environmental conditions.

Description

Technical Field

[0001] The invention relates to the technical field of antistatic partition film preparation, in particular to an antistatic partition film and a preparation method thereof. Background Art

[0002] Antistatic separator film is a material with antistatic properties. Its main function is to prevent static interference and electrostatic discharge. In the production process of PCB boards and SMT processes, this antistatic separator film is usually used.

[0003] There are two main preparation processes for the existing antistatic separator film. One is to apply antistatic agent / liquid on the surface of the substrate, bake and cool it to obtain the antistatic separator film; the other is to add antistatic masterbatch to the plastic raw material, and obtain the antistatic separator film by melt extrusion. However, in the former, since the antistatic agent / liquid is directly applied to the surface of the substrate, as the number of frictions increases, the antistatic agent will gradually fall off, affecting its durability. In the latter, since the antistatic agent in the antistatic masterbatch usually relies on hygroscopicity to reduce the surface resistance, if the ambient humidity is insufficient, the antistatic effect will be affected.

[0004] Therefore, it is necessary to improve the preparation process of the existing antistatic separator film to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an antistatic separator film and a preparation method thereof, which can make the antistatic separator film have a lasting antistatic effect, a long service life and is not affected by environmental conditions.

[0006] To achieve this object, the present invention adopts the following technical solutions: An antistatic separator film is prepared from raw materials containing the following mass percentages: 75% to 85% of plastic raw materials, 15% to 25% of polymer permanent antistatic agents, and 0.01% to 0.5% of colorants.

[0007] As a preferred embodiment of the present invention, the plastic raw material is one of PA, ABS, ABS / PC, HIPS, PBT, PET, POM, PVC, PE, and PP materials.

[0008] As a preferred embodiment of the present invention, the polymer permanent antistatic agent includes any one or a combination of two or more of a polyolefin polymer antistatic agent and a polyoxyethylene ether antistatic agent.

[0009] As a preferred embodiment of the present invention, the colorant is a masterbatch or a color powder.

[0010] As a preferred embodiment of the present invention, the thickness of the antistatic partition film is 0.45 mm to 1.8 mm.

[0011] The present invention also provides a method for preparing an antistatic separator film, which is used to prepare the above-mentioned antistatic separator film, and the preparation method comprises the following steps: S1: Drying the plastic raw materials; S2: Add the plastic raw materials, polymer permanent antistatic agent and colorant into a high-speed mixer for heating and mixing, and then introduce them into a homogenizer for homogenization; S3: introducing the homogenized material into a twin-screw extruder for melt extrusion molding, and then cooling it to form an antistatic material sheet embryo; S4: introducing the antistatic material sheet into a three-roll calender for roll forming to obtain an antistatic material sheet produced continuously in the length direction; S5: Cut the antistatic material sheet to obtain an antistatic partition film.

[0012] As a preferred embodiment of the present invention, in step S1, when the drying process is performed, the temperature is controlled at 80° C. to 90° C. and the time is controlled at 2 h to 4 h.

[0013] As a preferred embodiment of the present invention, in step S2, when heating and mixing are performed, the mixing temperature is controlled at 80°C to 85°C, the mixing time is controlled at 30min to 45min, and the mixing speed is controlled at 450-550r / min; when homogenizing, the pressure is controlled at 1.2MPa to 1.35MPa, and the homogenizing time is controlled at 12min to 15min.

[0014] As a preferred embodiment of the present invention, in step S3, the melting temperature is controlled at 100°C to 300°C.

[0015] As a preferred embodiment of the present invention, in step S4, when roller forming is performed, the running speed of the roller is controlled at 0.1 m / min to 15 m / min, and the hot pressing pressure is controlled at 3 MPa to 15 MPa.

[0016] The beneficial effects of the present invention are: 1. Compared with the existing antistatic partition film prepared by coating the antistatic agent / liquid on the surface of the substrate, the antistatic partition film of the present invention is prepared by adding a polymer permanent antistatic agent to the plastic raw material for blending and modification and then extruding and calendering, and has excellent long-lasting antistatic effect and a long service life.

[0017] 2. Compared with the existing antistatic partition film made by adding antistatic masterbatch to plastic raw materials, the antistatic partition film of the present invention adds a polymer permanent antistatic agent, which has low dependence on humidity and has a good antistatic effect even under extremely low humidity (RH≤30%) and other special conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The invention provides a flowchart of a method for preparing an antistatic partition film. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0020] An antistatic partition film is prepared from raw materials containing the following mass percentages: 75% to 85% of plastic raw materials, 15% to 25% of high molecular permanent antistatic agents, and 0.01% to 0.5% of colorants.

[0021] Among them, the plastic raw material is one of PA, ABS, ABS / PC, HIPS, PBT, PET, POM, PVC, PE, and PP materials.

[0022] The polymer permanent antistatic agent includes any one or a combination of two or more of a polyolefin polymer antistatic agent and a polyoxyethylene ether antistatic agent.

[0023] The colorant is a masterbatch or a toner. The color of the colorant can be white, blue, etc.

[0024] Wherein, the thickness of the antistatic partition film is 0.45mm~1.8mm.

[0025] like Figure 1 As shown, the present invention also provides a method for preparing an antistatic partition film, which is used to prepare the above-mentioned antistatic partition film, and the preparation method comprises the following steps: S1: Drying the plastic raw material; during the drying process, the temperature is controlled at 80°C to 90°C, and the time is controlled at 2h to 4h.

[0026] S2: Add plastic raw materials, polymer permanent antistatic agent and colorant into a high-speed mixer for heating and mixing, and then introduce them into a homogenizer for homogenization; when heating and mixing, the mixing temperature is controlled at 80°C to 85°C, the mixing time is controlled at 30min to 45min, and the mixing speed is controlled at 450-550r / min; when homogenizing, the pressure is controlled at 1.2MPa to 1.35MPa, and the homogenization time is controlled at 12min to 15min.

[0027] S3: introducing the homogenized material into a twin-screw extruder for melt extrusion molding, and then cooling it to form an antistatic material sheet embryo; wherein the melting temperature is controlled at 100°C to 300°C.

[0028] S4: introducing the antistatic material sheet into a three-roll calender for roll forming to obtain antistatic material sheets continuously produced in the length direction; during roll forming, the running speed of the roller is controlled at 0.1m / min to 15m / min, and the hot pressing pressure is controlled at 3MPa to 15MPa.

[0029] S5: Cut the antistatic material sheet to obtain an antistatic partition film.

[0030] The antistatic separator film is prepared by using the preferred components in Table 1 below. The preparation steps of each antistatic separator film sample are as described above.

[0031] Table 1 Formula of Examples 1-3 of an antistatic separator film of the present invention raw material / % Example 1 Example 2 Example 3 Polypropylene (PP) resin 84.5 79.5 74.5 Polymer permanent antistatic agent 15 20 25 Colorants 0.5 0.5 0.5 The performance of Examples 1-3 was tested using the following standards or methods. The test results are shown in Table 2.

[0032] Dimensional change rate: Place the sample in a blast test chamber at 80±2℃ for 1 hour, then cool it naturally at room temperature for 2 hours, and measure whether the dimensional change rate of the sample exceeds 5%.

[0033] Surface resistivity: According to GB / T1410-2006 “Test method for volume resistivity and surface resistivity of solid insulating materials”, the surface resistivity of the sample is tested. Test items Example 1 Example 2 Example 3 Dimensional change rate No more than 5% No more than 5% No more than 5% Surface resistivity <![CDATA[8×10 8 ]]> <![CDATA[6×10 9 ]]> <![CDATA[3×10 10 ]]>

[0034] The test results in Table 2 above show that the size change rate of the antistatic separator film of the present invention does not exceed 5%, and the thermal stability is good; the surface resistivity can reach 10 8 ~10 10 , excellent anti-static performance.

[0035] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. An antistatic separator film, characterized in that: The antistatic partition film is made of raw materials containing the following mass percentages: 75% to 85% of plastic raw materials, 15% to 25% of polymer permanent antistatic agent, and 0.01% to 0.5% of colorant.

2. The antistatic separator film according to claim 1, characterized in that: The plastic raw material is one of PA, ABS, ABS / PC, HIPS, PBT, PET, POM, PVC, PE, and PP materials.

3. The antistatic partition film according to claim 1, characterized in that: The polymer permanent antistatic agent includes any one or a combination of two or more of a polyolefin polymer antistatic agent and a polyoxyethylene ether antistatic agent.

4. The antistatic separator film according to claim 1, characterized in that: The colorant is a masterbatch or a toner.

5. The antistatic separator film according to claim 1, characterized in that: The thickness of the antistatic partition film is 0.45 mm to 1.8 mm.

6. A method for preparing an antistatic separator film, used for preparing the antistatic separator film according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: S1: Drying the plastic raw materials; S2: Add the plastic raw materials, polymer permanent antistatic agent and colorant into a high-speed mixer for heating and mixing, and then introduce them into a homogenizer for homogenization; S3: introducing the homogenized material into a twin-screw extruder for melt extrusion molding, and then cooling it to form an antistatic material sheet embryo; S4: introducing the antistatic material sheet into a three-roll calender for roll forming to obtain the antistatic material sheet produced continuously in the length direction; S5: Cut the antistatic material sheet to obtain an antistatic partition film.

7. The method for preparing an antistatic separator film according to claim 6, characterized in that: In the step S1, during the drying process, the temperature is controlled at 80° C. to 90° C. and the time is controlled at 2 h to 4 h.

8. The method for preparing an antistatic separator film according to claim 6, characterized in that: In the step S2, when the temperature is increased and mixed, the mixing temperature is controlled at 80°C to 85°C, the mixing time is controlled at 30min to 45min, and the mixing speed is controlled at 450-550r / min; when the homogenization treatment is performed, the pressure is controlled at 1.2MPa to 1.35MPa, and the homogenization treatment time is controlled at 12min to 15min.

9. The method for preparing an antistatic separator film according to claim 6, characterized in that: In step S3, the melting temperature is controlled at 100°C to 300°C.

10. The method for preparing an antistatic separator film according to claim 6, characterized in that: In the step S4, during the roller forming, the running speed of the roller is controlled at 0.1 m / min to 15 m / min, and the hot pressing pressure is controlled at 3 MPa to 15 MPa.

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