Manufacturing method of flexible foam plastic double-sided pressure-sensitive adhesive tape

Abstract

The invention discloses a manufacturing method of a flexible foamed plastic double-sided pressure-sensitive adhesive tape. The manufacturing method comprises the following steps: S1, taking flexible foamed plastic as a base material; s2, adopting a styrene-isoprene-styrene block copolymer, an acrylate copolymer, a cross-linking agent, tackifying resin, polyamide resin and liquid polyisobutene rubber raw materials as preparation materials of the pressure-sensitive adhesive; s3, adding the styrene-isoprene-styrene block copolymer, the acrylate copolymer and the cross-linking agent into the reaction kettle; s4, adding tackifying resin, polyamide resin and liquid polyisobutylene rubber; s5, after all the raw materials are completely melted and no obvious bubbles are extracted, filtering by using a multi-layer metal filter screen, and discharging; and S6, discharging, cooling, dicing and packaging. S7, a special coating machine is adopted; s8, selecting a proper release material; and S9, coating the outer side of the pressure-sensitive adhesive with a release layer. By optimizing the adhesive layer formula and the coating process, the double-sided pressure-sensitive adhesive tape with high adhesion strength is realized.

Description

Technical Field

[0001] The invention relates to the technical field of soft foam plastic double-sided pressure-sensitive adhesive tape processing, in particular to a method for manufacturing a soft foam plastic double-sided pressure-sensitive adhesive tape. Background Art

[0002] With the growing demand for adhesive materials in industrial production and daily life, the adhesive tape industry has experienced rapid development. However, traditional adhesive tapes are gradually showing limitations in some applications. For example, double-sided tapes based on ordinary paper or plastic film substrates perform poorly in terms of cushioning and flexibility. As a new type of tape, soft foam double-sided pressure-sensitive tape, with its unique performance advantages, is gradually emerging among other tape products and has become a key development direction in the tape industry.

[0003] In spacecraft thermal control systems, double-sided pressure-sensitive tapes are widely used for securing and connecting thermal insulation components due to their excellent adhesion properties. However, conventional double-sided pressure-sensitive tapes suffer from insufficient adhesion strength and poor environmental resistance, limiting their application in the complex space environment. Therefore, developing a method for manufacturing soft foam double-sided pressure-sensitive tapes is of great significance. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for manufacturing a soft foam plastic double-sided pressure-sensitive tape to solve the problems of insufficient adhesion strength and poor environmental resistance of traditional double-sided pressure-sensitive tapes raised in the above background technology, which limit their application in complex space environments.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a method for manufacturing a double-sided pressure-sensitive adhesive tape made of soft foam plastic, comprising the following steps: S1, using a soft foam plastic as a substrate, and performing a surface treatment on the soft foam plastic substrate before coating the pressure-sensitive adhesive; S2, using a styrene-isoprene-styrene block copolymer, an acrylate copolymer, a crosslinking agent, a tackifying resin, a polyamide resin, and a liquid polyisobutylene rubber raw material as materials for preparing the pressure-sensitive adhesive; S3, adding the styrene-isoprene-styrene block copolymer, the acrylate copolymer, and the crosslinking agent into a reaction kettle;

[0006] S4. Add tackifying resin, polyamide resin and liquid polyisobutylene rubber, and continue heating to 150-180°C; S5. After all raw materials are completely melted and no obvious bubbles are extracted, filter with a multi-layer metal filter and discharge the material; S6. After discharge, cool, cut into pieces and package to obtain a hot melt pressure-sensitive adhesive; S7. Use a dedicated coating machine to ensure that the pressure-sensitive adhesive is evenly coated on both sides of the soft foam plastic substrate; S8. Select a suitable release material, including polyester film or polytetrafluoroethylene film, to ensure that the tape is easy to use and store; S9. Apply a release layer on the outside of the pressure-sensitive adhesive with a thickness controlled between 0.05-0.1mm.

[0007] Preferably, in step S3, the temperature in the reactor is maintained at 130-150° C., and the reaction is stirred for 30-40 minutes.

[0008] Preferably, in step S4, the rotation speed is set to 30-50 rpm, the reactor is sealed, and vacuum is applied until the pressure reaches 0.08 MPa, and the reaction is carried out for 10-20 minutes.

[0009] Preferably, in step S7, the prepared hot melt pressure sensitive adhesive is placed in a coating machine and heated to 160-200° C. to melt it.

[0010] Preferably, in step S7, the double-sided pressure-sensitive tape is obtained by cooling the tape with a water cooling device, attaching a release film, and winding the tape.

[0011] Preferably, the surface treatment method in step S1 includes cleaning, drying and surface activation treatment.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention realizes a double-sided pressure-sensitive adhesive tape with high adhesion strength by optimizing the adhesive layer formula and coating process, realizes good environmental resistance by adopting soft foam plastic as the base material, realizes a double-sided pressure-sensitive adhesive tape that is easy to use and store by optimizing the release layer formula and coating process, realizes good structural adaptability by optimizing the shape and size design of the tape, and realizes a reliable connection method by optimizing the connection method design. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flowchart of the overall method steps of the present invention. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] See also Figure 1The present invention provides an embodiment: a method for manufacturing a soft foam plastic double-sided pressure-sensitive adhesive tape, comprising the following steps: S1, using soft foam plastic as a substrate, which has good thermal insulation performance and flexibility. The soft foam plastic has low density, light weight, good elasticity, and excellent thermal insulation performance. Before coating the pressure-sensitive adhesive, the soft foam plastic substrate is surface treated; S2, using styrene-isoprene-styrene block copolymer, acrylic ester copolymer, cross-linking agent, tackifying resin, polyamide resin and liquid polyisobutylene rubber raw materials as materials for preparing the pressure-sensitive adhesive; S3, mixing styrene-isoprene-styrene block copolymer, acrylic ester copolymer, cross-linking agent, tackifying resin, polyamide resin and liquid polyisobutylene rubber raw materials. The copolymer and cross-linking agent are added to the reactor; S4, tackifying resin, polyamide resin and liquid polyisobutylene rubber are added, and the heating is continued to be 150-180 ℃; S5, after all the raw materials are completely melted and no obvious bubbles are extracted, they are filtered with a multi-layer metal filter and discharged; S6, after discharging, the material is cooled, cut into pieces and packaged to obtain a hot melt pressure-sensitive adhesive; S7, a dedicated coating machine is used to ensure that the pressure-sensitive adhesive is evenly coated on both sides of the soft foam plastic substrate; S8, a suitable release material is selected, including polyester film or polytetrafluoroethylene film, to ensure that the tape is easy to use and store; S9, a release layer is coated on the outside of the pressure-sensitive adhesive with a thickness controlled between 0.05-0.1mm.

[0017] Furthermore, in step S3, the temperature in the reactor is maintained at 130-150° C., and the reaction is stirred for 30-40 minutes.

[0018] Furthermore, in step S4, the rotation speed is set to 30-50 rpm, the reactor is sealed, and vacuum is applied until the pressure reaches 0.08 MPa, and the reaction is carried out for 10-20 minutes.

[0019] Furthermore, in step S7, the prepared hot melt pressure sensitive adhesive is placed in a coating machine and heated to 160-200° C. to melt it.

[0020] Furthermore, in step S7, the double-sided pressure-sensitive tape is obtained by cooling the tape with a water cooling device, attaching a release film, and winding the tape.

[0021] Furthermore, the surface treatment method in step S1 includes cleaning, drying and surface activation treatment.

[0022] The present invention innovatively adopts a seven-layer composite structure, namely a release film (anti-static PET), an A-side adhesive layer (high thermal conductivity, 100μm), a silicone rubber transition layer (20μm, with stress buffering function), a gradient foam core layer (0.5mm, with thermal isolation function), a silicone rubber transition layer (20μm), a B-side adhesive layer (low degassing, 80μm) and a release film (fluorine-treated).

[0023] The specific formula of the gradient foam core layer is 100 parts of polyether polyurethane prepolymer, 5-8 parts of perfluoropolyether modifier, 10-15 parts of supercritical CO2 foaming agent, and 1-3 parts of nano-SiO2 nucleating agent.

[0024] The innovation of adhesive layer components is shown in the following table:

[0025] Components A side (high thermal conductivity) B side (low outgassing) matrix 2-Ethylhexyl acrylate Fluorosilicone rubber filler Carbon nanotubes (3 wt%) <![CDATA[气相SiO2(5wt%)]]> crosslinking agent Benzoyl peroxide platinum catalyst

[0026] Example 1

[0027] Foam preparation: density after supercritical foaming 0.25g / cm 3 , surface pore size 85μm, core pore size 155μm;

[0028] Coating process: Silicone rubber layer thickness 25±2μm (coating accuracy ±1μm), acrylate layer containing 3.5% carbon nanotubes (resistivity 10 3 Ω·cm);

[0029] Performance tests: Thermal conductivity is 0.075 W / (m·K) (laser flash method), recovery after 50% compression is 98.2% (ASTM D3574), and TML is 0.08% (ESA PSS-01-702).

[0030] The core innovations are: 1. Gradient foam structure: a dense surface layer (resistant to anti-oxidant oxygen corrosion) and a macroporous core layer (low thermal conductivity); 2. Double-sided functional differentiation: side A has high thermal conductivity (carbon nanotube network), and side B has low degassing performance (fluorosilicone system); 3. Interface strengthening technology: the silicone rubber transition layer reduces the interface stress by 60% (FEA simulation).

[0031] The technical benefit chart of the present invention is as follows:

[0032] index Improvement Test standards Thermal resistance performance 2.5 times improvement ASTM D5470 Vibration attenuation Reduce by 15dB MIL-STD-810G Space life Extended to 20 years ISO15856

[0033] As can be seen from the above table, the soft foam plastic double-sided pressure-sensitive tape prepared according to the method of the present invention has a thermal resistance performance improved by 2.5 times, a vibration attenuation reduced by 15 dB, and a space life extended to 20 years.

[0034] The economic benefit analysis chart of the present invention is as follows:

[0035] project Traditional crafts The present invention Raw material costs <![CDATA[￥120 / m 2 ]]> <![CDATA[￥85 / m 2 ]]> Production energy consumption <![CDATA[25kWh / m 2 ]]> <![CDATA[15kWh / m 2 ]]> Maintenance costs ￥800,000 / year ￥150,000 / year

[0036] As can be seen from the table above, the raw material cost of the soft foam double-sided pressure-sensitive tape prepared according to the method of the present invention is RMB 120 / m compared to the traditional process. 2 , reduced to ￥85 / m 2 The production energy consumption is 25kWh / m compared with the traditional process. 2Reduced to 15kWh / m 2 The maintenance cost is reduced to ￥150,000 / year compared to ￥800,000 / year of traditional technology.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a soft foam plastic double-sided pressure-sensitive tape, characterized in that: The method comprises the following steps: S1. Using a soft foam plastic as a substrate, and performing surface treatment on the soft foam plastic substrate before applying the pressure-sensitive adhesive; S2, using styrene-isoprene-styrene block copolymer, acrylate copolymer, crosslinking agent, tackifying resin, polyamide resin and liquid polyisobutylene rubber raw materials as the preparation materials of pressure-sensitive adhesive; S3, adding styrene-isoprene-styrene block copolymer, acrylate copolymer and cross-linking agent into a reaction kettle; S4, adding tackifying resin, polyamide resin and liquid polyisobutylene rubber, and continuing to heat to 150-180°C; S5. After all the raw materials are completely melted and no obvious bubbles are extracted, filter them with a multi-layer metal filter and discharge them; S6, cooling, cutting and packaging the material after discharging to obtain a hot melt pressure sensitive adhesive; S7. Use a dedicated coating machine to ensure that the pressure-sensitive adhesive is evenly coated on both sides of the soft foam plastic substrate; S8. Choose the right release material, including polyester film or polytetrafluoroethylene film, to ensure the tape is easy to use and store; S9. Apply a release layer on the outside of the pressure-sensitive adhesive with a thickness of 0.05-0.1mm.

2. The method for manufacturing a soft foam plastic double-sided pressure-sensitive tape according to claim 1, characterized in that: In step S3, the temperature in the reactor is maintained at 130-150° C., and the reaction is stirred for 30-40 minutes.

3. The method for manufacturing a soft foam plastic double-sided pressure-sensitive tape according to claim 1, characterized in that: In step S4, the rotation speed is set to 30-50 rpm, the reactor is sealed, and vacuum is applied until the pressure reaches 0.08 MPa, and the reaction is continued for 10-20 minutes.

4. The method for manufacturing a soft foam plastic double-sided pressure-sensitive tape according to claim 1, characterized in that: In step S7, the prepared hot melt pressure sensitive adhesive is placed in a coating machine and heated to 160-200° C. to melt the adhesive.

5. The method for manufacturing a soft foam plastic double-sided pressure-sensitive tape according to claim 1, characterized in that: In step S7, the double-sided pressure-sensitive tape is obtained by cooling the tape with a water cooling device, attaching a release film, and winding the tape.

6. The method for manufacturing a soft foam plastic double-sided pressure-sensitive adhesive tape according to claim 1, characterized in that: The surface treatment method in step S1 includes cleaning, drying and surface activation treatment.

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