Preparation process of chemically synthesized release paper

Abstract

The invention belongs to the technical field of release paper processing, and particularly relates to a preparation process of chemically synthesized release paper, which not only enhances the uniform distribution of a coating, but also promotes the formation of new chemical bonds by introducing a nonionic surfactant for modification treatment and combining with a specific ultraviolet irradiation step. The stability and durability of the release paper under a high-temperature condition are obviously improved. Besides, close combination between the new coating and the old coating is ensured by a method of combining secondary heating and ultraviolet photograph, and the overall performance of the finished release paper is further improved, so that the release paper can keep excellent demolding characteristics in a wider temperature range. Finally, the innovative preparation process enables the release paper product to be more suitable for being used in a high-temperature environment with harsh requirements, and the application potential of the release paper product is expanded.

Description

Technical Field

[0001] The invention belongs to the technical field of release paper processing, and in particular relates to a preparation process of chemically synthesized release paper. Background Art

[0002] Release paper is widely used in various industrial and commercial fields, such as food packaging, label making, electronic component protection, etc. The traditional preparation process of release paper usually involves coating a layer of silicone on the substrate, which gives the release paper the required release properties. However, the existing preparation methods often focus on performance optimization under room temperature conditions, and insufficient consideration is given to the stability of use in high temperature environments.

[0003] In the prior art, in order to enhance the demoulding effect of release paper, a mixed solution containing a siloxane compound and an organic solvent is generally coated on the surface of the substrate, and then the solvent is volatilized by heating and the coating is initially cured. A surfactant may be added to improve the uniformity and surface properties of the coating. Although this method can provide good initial demoulding performance, the performance of the release paper is prone to decline in a high temperature environment, resulting in the inability to maintain the original release effect, affecting the quality and application range of the product.

[0004] The present invention aims to solve the problem of unstable performance of release paper in high temperature environment. Specifically, the traditional preparation process fails to fully consider the impact of high temperature on the chemical structure of release paper, thus limiting its reliability in a wider range of application scenarios. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation process of chemically synthesized release paper, so that the release paper product is more suitable for use in demanding high-temperature environments, expanding its application potential, and solving the problems in the prior art mentioned in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a preparation process of chemically synthesized release paper, comprising:

[0007] A mixed solution containing a silicone compound and an organic solvent is coated on the surface of the substrate, and then heated to volatilize the organic solvent and preliminarily cure the coating; a non-ionic surfactant is introduced into the coating surface for modification, and pressure is applied to ensure uniform distribution of the active agent, and then the coating structure is stabilized by cooling to ambient temperature; a solution containing different silicone components is coated again, and secondary heating is performed to promote the combination of the new layer and the original layer, and ultraviolet light is applied to promote the formation of chemical bonds, and the finished release paper is obtained by cutting.

[0008] Preferably, the organic solvent consists of acetone and isopropanol in a volume ratio of 3:7, and the ratio of the organic solvent to the siloxane compound is 90:10-95:5.

[0009] Preferably, the heating treatment condition is: the heating temperature is 80°C-120°C.

[0010] Preferably, the nonionic surfactant is polyoxyethylene sorbitan monooleate, and its addition amount is 0.5%-1.5% of the coating weight.

[0011] Preferably, the applied pressure is set in the range of 0.5 MPa-2 MPa.

[0012] Preferably, the step of cooling the coating structure to ambient temperature to stabilize the coating structure comprises: a cooling rate not exceeding 10° C. per minute.

[0013] Preferably, the re-coating of a solution containing a different siloxane component comprises: the siloxane content in the coating solution is higher than that of the first use by more than 20%.

[0014] Preferably, the secondary heating to promote the bonding of the new layer with the original layer comprises: the heating time lasts for 10 minutes to 30 minutes.

[0015] Preferably, the condition of the ultraviolet light irradiation is: the ultraviolet light intensity is set to 100 mW / cm2 to 300 mW / cm2.

[0016] Preferably, the dimensional tolerance of the finished release paper does not exceed ±0.5 mm.

[0017] Technical effects and advantages of the present invention: Compared with the prior art, the preparation process of a chemically synthesized release paper proposed by the present invention has the following advantages:

[0018] The present invention not only enhances the uniform distribution of the coating, but also promotes the formation of new chemical bonds by introducing a non-ionic surfactant modification treatment and combining it with a specific ultraviolet light irradiation step, thereby significantly improving the stability and durability of the release paper under high temperature conditions. In addition, the method of combining secondary heating and ultraviolet light irradiation ensures a close bond between the new and old coatings, further improving the overall performance of the finished release paper, enabling it to maintain excellent demolding properties over a wider temperature range. Ultimately, this innovative preparation process makes the release paper product more suitable for use in demanding high-temperature environments, expanding its application potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a flow chart of the preparation process of the chemically synthesized release paper. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] The present invention provides Figure 1 A preparation process of a chemically synthesized release paper is shown, comprising:

[0023] Step 1: coating a mixed solution containing a siloxane compound and an organic solvent on the surface of the substrate, and then heating the substrate to volatilize the organic solvent and preliminarily cure the coating;

[0024] The organic solvent is composed of acetone and isopropanol, the volume ratio of the two is 3:7, and the ratio of the organic solvent to the siloxane compound is 90:10-95:5. The heating treatment conditions are: the heating temperature is 80°C-120°C.

[0025] Specifically, the mixed solution of siloxane compound and organic solvent:

[0026] Silicone compounds: As the core component of release paper, they provide key release properties. They can form a smooth coating with low surface energy, making the release paper exhibit excellent non-adhesive properties when in contact with other materials.

[0027] Organic solvents (acetone and isopropyl alcohol): used to dissolve the silicone compound and ensure that it can be evenly applied to the surface of the substrate. A mixture of acetone and isopropyl alcohol is chosen because the two solvents have different evaporation rates - acetone is faster and isopropyl alcohol is slower. This combination allows the coating to set quickly in the early stage while giving enough time for the silicone to be evenly distributed, thus ensuring the quality of the coating.

[0028] The ratio of organic solvent to siloxane compound is 90:10 to 95:5: This ratio is chosen to balance the fluidity and drying speed of the coating. A higher proportion of organic solvent helps to improve the fluidity of the solution and facilitates construction operations; while the appropriate amount of siloxane ensures effective curing of the coating and the performance of the final product. The ratio within this range can provide good coating properties and can quickly cure after heat treatment to form a stable and strong coating structure.

[0029] Organic solvent composition and volume ratio (acetone: isopropanol = 3:7): This ratio takes into account the different evaporation rates of the two solvents and their response to changes in ambient temperature. Acetone evaporates quickly, which can accelerate the initial film formation process; isopropanol evaporates slowly, which helps to extend the working time and promote a more uniform distribution of siloxane on the substrate. This ratio has been experimentally verified to achieve rapid drying and initial curing of the coating while ensuring good coating properties.

[0030] Heating treatment conditions (80℃-120℃): The selected temperature range can not only effectively promote the volatilization of organic solvents to avoid residual effects on subsequent steps, but also prevent premature complete curing or decomposition of siloxane compounds due to excessively high temperatures. Lower temperatures (such as 80℃) are suitable for heat-sensitive substrates, while higher temperatures (such as close to 120℃) help speed up production efficiency and ensure that the coating is fully cured, laying a solid foundation for subsequent modification treatments.

[0031] In summary, this embodiment aims to prepare a release paper that can maintain high performance and stability in a high temperature environment by precisely controlling the proportion of each component and the process parameters. This method not only improves production efficiency, but also ensures that the finished product has excellent demoulding properties and durability, and is particularly suitable for application scenarios that need to withstand high temperatures.

[0032] Step 2: Introduce a non-ionic surfactant to modify the coating surface, apply pressure to ensure uniform distribution of the surfactant, and then cool to ambient temperature to stabilize the coating structure, with a cooling rate not exceeding 10°C per minute;

[0033] The nonionic surfactant is polyoxyethylene sorbitan monooleate, and the amount of the nonionic surfactant added is 0.5%-1.5% of the coating weight. The applied pressure is set in the range of 0.5MPa-2MPa.

[0034] Specifically, nonionic surfactant (polyoxyethylene sorbitan monooleate):

[0035] Function of ingredients: Polyoxyethylene sorbitan monooleate (Tween 80) is a highly efficient nonionic surfactant that can form a protective film on the surface of the silicone coating. It not only enhances the smoothness of the coating, but also improves its release properties, especially in high temperature environments, helping to maintain the stability and demoulding performance of the coating.

[0036] The addition amount is 0.5%-1.5% of the coating weight: the addition amount within this range has been optimized to effectively improve the uniformity and smoothness of the coating without excessively affecting the basic properties of the siloxane coating. Lower addition amounts (such as 0.5%) are suitable for applications where surface modification requirements are not so high; while higher addition amounts (such as 1.5%) are more suitable for applications that require better surface properties, such as high-precision printing or processing of special materials.

[0037] Proportion of nonionic surfactant: The selection of 0.5%-1.5% addition is based on best practices verified by experiments. Too low an addition may not significantly improve the surface properties of the coating, while too high an addition may cause changes in the coating structure and even affect the demolding effect of the final product. Therefore, this range ensures that the active agent can be fully dispersed and perform its functions while maintaining the core advantages of the silicone coating.

[0038] Introducing nonionic surfactants for modification: Introducing surfactants on the preliminarily cured silicone coating can further improve the surface properties of the coating, increase its anti-adhesion and durability. In addition, this treatment method can also reduce defects caused by uneven substrate surfaces, ensuring that the finished release paper has higher quality and consistency.

[0039] Applying pressure (0.5MPa-2MPa): By applying appropriate pressure, the surfactant can be more evenly distributed on the coating surface, thereby ensuring uniform coverage throughout the coating. The lower limit of 0.5MPa ensures sufficient pressure to promote the penetration of the active agent, while the upper limit of 2MPa avoids the risk of damaging the coating. This range of pressure values ​​is conducive to the distribution of the active agent without negatively affecting the coating structure.

[0040] Cool to ambient temperature, cooling rate not exceeding 10°C per minute: Controlling the cooling rate is critical to maintaining the stability of the coating structure. A slower cooling process (not exceeding 10°C per minute) allows the internal stress of the coating to be gradually released, preventing cracks or other structural damage caused by rapid cooling. This step ensures that the coating can still maintain excellent physical and chemical properties after cooling, especially when used under high temperature conditions, it can provide a stable release effect.

[0041] In summary, this embodiment aims to prepare a release paper that maintains high performance and stability in a high temperature environment by precisely controlling the amount of nonionic surfactant added, applying appropriate pressure, and reasonably regulating the cooling rate. This method not only improves the surface quality and release properties of the finished product, but also ensures the integrity and stability of the coating structure, and is particularly suitable for application scenarios that need to withstand high temperatures and complex environmental conditions.

[0042] Step 3: Re-apply a solution containing different silicone components, wherein the silicone content in the coating solution is more than 20% higher than that of the first use, and perform secondary heating to promote the bonding of the new layer with the original layer, the heating time lasting 10 to 30 minutes, and apply ultraviolet light to promote the formation of chemical bonds, and the intensity of the ultraviolet light is set to 100 mW / cm2 to 300 mW / cm2, and obtain the finished release paper by cutting, and the dimensional tolerance of the finished release paper does not exceed ±0.5 mm.

[0043] Specifically, the silicone solution applied again:

[0044] Siloxane content is 20% higher than the first application: During the secondary coating process, the use of a solution with a higher siloxane content can significantly increase the thickness and density of the coating. This not only improves the overall performance of the release paper, but also particularly enhances its stability and durability in high temperature environments. The increased siloxane content ensures a stronger bond between the new layer and the original coating, thereby improving the mechanical strength of the finished product.

[0045] Increased Siloxane Content: Choosing a 20% higher siloxane content than the first application is to ensure that the new layer can provide additional protection and support without destroying the basic properties of the original coating. Through experimental verification, this incremental range can meet the needs of enhanced performance without causing excessive coating thickness or unnecessary cost increases.

[0046] Implement secondary heating (10 minutes to 30 minutes):

[0047] Time control: The main purpose of secondary heating is to promote close bonding between the new and old layers of silicone. The heating time is set to 10 minutes to 30 minutes to ensure sufficient reaction time to form a solid chemical bond without excessively extending the production cycle. A shorter time (such as 10 minutes) is suitable for rapid curing needs, while a longer time (such as 30 minutes) ensures a more thorough cross-linking reaction and is suitable for applications with higher requirements for adhesion strength.

[0048] Apply UV light (100 mW / cm2 to 300 mW / cm2):

[0049] Light intensity setting: UV irradiation is an effective means to promote the formation of chemical bonds. The UV intensity of 100 mW / cm2 to 300 mW / cm2 is selected to ensure that the active components can react at an appropriate energy level, without incomplete reactions due to insufficient intensity, or damage to the material structure due to excessive intensity. Lower light intensity (such as 100 mW / cm2) is suitable for sensitive materials or situations that require gentle treatment; higher light intensity (such as 300 mW / cm2) can accelerate the reaction process and improve production efficiency.

[0050] Cut the finished release paper, the dimensional tolerance does not exceed ± 0.5 mm:

[0051] Precision cutting: The last step is to precisely cut the prepared release paper to ensure the consistency and accuracy of the finished product size. The dimensional tolerance is controlled within ±0.5 mm, which reflects the high requirements for product quality and ensures the adaptability and reliability of the release paper in practical applications. This strict dimensional control is particularly important in high-precision processing fields, such as electronic component manufacturing, medical device packaging, etc.

[0052] In summary, this embodiment aims to prepare a release paper with excellent high temperature stability, high strength bonding and high precision size control by optimizing the composition ratio of the siloxane solution, reasonably arranging the secondary heating time and the intensity of ultraviolet light irradiation, and strictly implementing the accuracy requirements of the final cutting. This process not only improves the physical and chemical properties of the finished product, but also ensures its reliability and durability in complex application environments, and is particularly suitable for industrial fields that are sensitive to temperature or require fine processing.

[0053] The following is experimental data, showing the specific parameters and test results of each key step in the preparation of chemical synthetic release paper. These data are intended to verify the effectiveness of the preparation process and the performance of the finished release paper.

[0054] Experimental conditions and materials:

[0055] Base material: Standard release paper base material''

[0056] Silicone Compounds: Specific types of silicone used to provide release properties.

[0057] Organic solvent: mixture of acetone and isopropanol in a volume ratio of 3:7.

[0058] Nonionic surfactant: polyoxyethylene sorbitan monooleate (Tween 80).

[0059] UV irradiation equipment: UV light source with adjustable intensity.

[0060] Experimental steps and parameters:

[0061] Step 1: Preliminary coating and curing; parameter Test value Ratio of organic solvent to siloxane compound 92:8 Heating temperature 100℃ Initial curing time 15 minutes

[0063] Step 2: Modification and structural stabilization

[0065] Step 3: Secondary coating, cross-linking and final molding parameter Test value Siloxane content increase 25% higher than first use Secondary heating time 25 minutes UV light intensity 200 mW / cm2 Finished product size tolerance ±0.3 mm

[0067] Performance Test Results

[0069] It can be seen from the above experimental data that the release paper prepared according to the process flow in "Example 1" has excellent performance in high temperature stability, mechanical strength, surface smoothness, dimensional accuracy, chemical resistance and demolding performance. In particular, after specific ultraviolet light irradiation and secondary heating treatment, the bond between the new and old coatings is tighter, which significantly improves the overall performance of the release paper. These results verify the effectiveness of the preparation process and show that the finished release paper is suitable for application scenarios that need to withstand higher temperatures and complex environmental conditions.

[0070] Example 2

[0071] This embodiment provides a preparation process of chemically synthesized release paper, which aims to further optimize the performance stability of release paper in extreme high temperature environments and improve its mechanical strength and dimensional accuracy. By adjusting key process parameters and material composition ratios, better coating uniformity and stronger bonding between new and old layers are achieved, thereby providing a more reliable solution for high temperature applications.

[0072] Specific steps

[0073] Step 1: Preliminary coating and curing

[0074] Mixed solution preparation:

[0075] A mixed solution containing a siloxane compound and an organic solvent is applied to the surface of the substrate.

[0076] The organic solvent consists of acetone and isopropanol, and the volume ratio is adjusted to 4:6 to meet different volatilization rate requirements.

[0077] The ratio of organic solvent to silicone compound was set at 92:8 to optimize the balance between fluidity and drying speed.

[0078] Heat treatment:

[0079] The heating temperature was set at 100 °C to ensure that the organic solvent was fully volatilized and the coating was initially cured while avoiding overheating of the substrate.

[0080] Step 2: Modification and structural stabilization

[0081] Introduction of nonionic surfactants:

[0082] Polyoxyethylene sorbitan monooleate was used as a nonionic surfactant, and the addition amount was adjusted to 1.0% of the coating weight to enhance the smoothness and release properties of the coating.

[0083] Apply pressure:

[0084] The applied pressure was set at 1.5 MPa to ensure that the active agent could penetrate deeper into the coating and form a more uniform distribution.

[0085] Cooling process:

[0086] The cooling rate is controlled at 8°C per minute to better release the internal stress of the coating and reduce cracks or defects caused by rapid cooling.

[0087] Step 3: Secondary coating, cross-linking and final molding

[0088] Re-apply:

[0089] A solution containing different siloxane components is applied, in which the siloxane content is 25% higher than the first application, in order to strengthen the thickness and density of the new coating and further improve the high temperature stability and durability of the release paper.

[0090] Secondary heating:

[0091] The heating time is extended to 25 minutes to ensure that the new and old layers of silicone have enough time to combine tightly and form a solid chemical bond.

[0092] UV light exposure:

[0093] The UV light intensity was set at 200 mW / cm2 to promote the efficient formation of chemical bonds while taking into account reaction speed and material safety.

[0094] Cutting finished product:

[0095] Finally, the finished release paper is obtained through precision cutting, and the dimensional tolerance is strictly controlled within ±0.3 mm to meet higher precision application requirements.

[0096] Through the above process flow, this example successfully prepared a release paper with excellent high-temperature stability, high-strength bonding and high-precision dimensional control. This product is not only suitable for conventional industrial environments, but also maintains excellent demolding characteristics and mechanical properties under extreme high temperature conditions, providing a reliable choice for high-demand fields such as electronic component manufacturing and medical device packaging. In addition, through the fine control of various process parameters, this example also shows how to flexibly adjust the preparation method according to specific application scenarios to achieve the best product performance.

[0097] The following is detailed experimental data, showing the specific parameters and test results of each key step in the process of preparing chemically synthesized release paper. These data are intended to verify the effectiveness of the preparation process in Example 2 and the performance of the finished release paper.

[0098] Experimental conditions and materials:

[0099] Substrate: Standard release paper substrate;

[0100] Silicone Compounds: Specific types of silicone used to provide release properties.

[0101] Organic solvent: mixture of acetone and isopropanol in a volume ratio of 4:6.

[0102] Nonionic surfactant: polyoxyethylene sorbitan monooleate (Tween 80).

[0103] UV irradiation equipment: UV light source with adjustable intensity.

[0104] Experimental steps and parameters:

[0105] Step 1: Preliminary coating and curing: parameter Test value Ratio of organic solvent to siloxane compound 92:8 Heating temperature 100℃ Initial curing time 20 minutes

[0107] Step 2: Modification and structural stabilization: parameter Test value Nonionic surfactant addition amount 1.0% of coating weight Apply pressure 1.5MPa Cooling rate 8℃ per minute

[0109] Step 3: Secondary coating, cross-linking and final molding: parameter Test value Siloxane content increase 25% higher than first use Secondary heating time 25 minutes UV light intensity 200 mW / cm2 Finished product size tolerance ±0.3 mm

[0111] Performance test results:

[0113] Special test results:

[0115] Detailed experimental data record:

[0116] Step 1: Preliminary coating and curing

[0117] The coating thickness after initial curing is: the average thickness is 15 microns, and the standard deviation is ±1 micron.

[0118] Uniformity of coating after initial curing: Through optical microscope inspection, there is no obvious unevenness on the coating surface.

[0119] Step 2: Modification and structural stabilization

[0120] Surfactant penetration depth: Detected by fluorescent labeling method, the surfactant penetration depth reaches 5 microns, ensuring the uniform distribution of the surfactant in the coating.

[0121] Coating hardness after cooling: measured by a hardness tester, the hardness value is H=60, indicating that the coating structure is stable and hard.

[0122] Step 3: Secondary coating, cross-linking and final molding

[0123] Bonding strength between new and old layers: Through the peel strength test, the average peel strength reached 12N / 25mm, proving that the new and old coatings are tightly bonded.

[0124] Chemical bond formation after UV irradiation: Infrared spectroscopy confirmed the formation of new chemical bonds, which enhanced the overall performance of the coating.

[0125] It can be seen from the above experimental data that the release paper prepared according to the process flow in "Example 2" has excellent performance in high temperature stability, mechanical strength, surface smoothness, dimensional accuracy, chemical resistance and demolding performance. In particular, after specific ultraviolet light irradiation and secondary heating treatment, the combination between the new and old coatings is tighter, which significantly improves the overall performance of the release paper. In addition, the optimized process parameters have further improved the mechanical strength and long-term high temperature stability of the release paper in extreme high temperature environments, making it suitable for more demanding application scenarios.

[0126] Example 3

[0127] This example aims to further optimize the performance stability of release paper in high temperature environments, while exploring the use of different types of non-ionic surfactants and adjusting UV irradiation parameters to improve the mechanical strength and dimensional accuracy of the finished product. By introducing new surfactants and optimizing key process parameters, better coating uniformity and stronger bonding between the new and old layers are achieved, providing a more reliable solution for high temperature applications.

[0128] Specific steps

[0129] Step 1: Preliminary coating and curing

[0130] Mixed solution preparation:

[0131] A mixed solution containing a siloxane compound and an organic solvent is applied to the surface of the substrate.

[0132] The organic solvent consists of acetone and isopropanol, and the volume ratio is adjusted to 2:8 to meet different volatilization rate requirements and optimize the initial film formation speed.

[0133] The ratio of organic solvent to siloxane compound is set at 94:6, which ensures that the solution has good fluidity, facilitates construction operation, and ensures effective curing of the coating.

[0134] Heat treatment:

[0135] The heating temperature was set at 110°C to accelerate the volatilization of the organic solvent and promote the initial curing while ensuring that no damage was caused to the substrate.

[0136] Step 2: Modification and structural stabilization

[0137] Introduction of nonionic surfactants:

[0138] Polyoxyethylene (20) stearate was used as a nonionic surfactant, and the addition amount was set to 1.2% of the coating weight to enhance the smoothness and release properties of the coating and provide better chemical resistance.

[0139] Apply pressure:

[0140] The applied pressure was set at 1.8 MPa to ensure that the active agent could penetrate deeper into the coating, form a more uniform distribution, and improve the compactness of the coating.

[0141] Cooling process:

[0142] The cooling rate is controlled at 7°C per minute to better release the internal stress of the coating, reduce cracks or defects caused by rapid cooling, and ensure the integrity of the coating structure.

[0143] Step 3: Secondary coating, cross-linking and final molding

[0144] Re-apply:

[0145] Apply a solution containing different siloxane components, in which the siloxane content is 30% higher than the first use, in order to strengthen the thickness and density of the new coating, further improve the high temperature stability and durability of the release paper, and meet more demanding application conditions.

[0146] Secondary heating:

[0147] The heating time is extended to 30 minutes to ensure that the new and old layers of silicone have enough time to combine tightly and form a strong chemical bond, which is particularly suitable for application scenarios with extremely high requirements for adhesion strength.

[0148] UV light exposure:

[0149] The UV light intensity is set at 250 mW / cm2 to promote the efficient formation of chemical bonds while taking into account reaction speed and material safety to ensure coating quality.

[0150] Cutting finished product:

[0151] Finally, the finished release paper is obtained through precision cutting, and the dimensional tolerance is strictly controlled within ±0.4 mm to meet higher precision application requirements and ensure the adaptability and reliability of the finished product in actual use.

[0152] Through the above process flow, this embodiment successfully prepared a release paper with excellent high temperature stability, high strength bonding and high precision dimensional control. This product is not only suitable for conventional industrial environments, but also can maintain excellent demolding characteristics and mechanical properties under extreme high temperature conditions, providing a reliable choice for high-demand fields such as electronic component manufacturing and medical device packaging. In addition, through the fine control of various process parameters, especially the introduction of new surfactants and the adjustment of ultraviolet light irradiation parameters, this embodiment demonstrates how to flexibly adjust the preparation method according to the specific application scenario to achieve the best product performance and application effect.

[0153] The following is detailed experimental data, showing the specific parameters and test results of each key step in the process of preparing chemically synthesized release paper. These data are intended to verify the effectiveness of the preparation process in Example 3 and the performance of the finished release paper.

[0154] Experimental conditions and materials:

[0155] Base material: Standard release paper base material

[0156] Silicone Compounds: Specific types of silicone used to provide release properties.

[0157] Organic solvent: mixture of acetone and isopropanol in a volume ratio of 2:8.

[0158] Nonionic surfactant: polyoxyethylene (20) stearate.

[0159] UV irradiation equipment: UV light source with adjustable intensity.

[0160] Experimental steps and parameters:

[0161] Step 1: Preliminary coating and curing: parameter Test value Ratio of organic solvent to siloxane compound 94:6 Heating temperature 110℃ Initial curing time 15 minutes

[0163] Step 2: Modification and structural stabilization:

[0165] Step 3: Secondary coating, cross-linking and final molding: parameter Test value Siloxane content increase 30% higher than first use Secondary heating time 30 minutes UV light intensity 250 mW / cm2 Finished product size tolerance ±0.4 mm

[0167] Performance test results:

[0169] Special test results (optimization points for Example 3)

[0171] Detailed experimental data record:

[0172] Step 1: Preliminary coating and curing

[0173] The coating thickness after initial curing is: the average thickness is 18 microns, and the standard deviation is ±1 micron.

[0174] Coating uniformity after initial curing: Through optical microscope inspection, there is no obvious unevenness on the coating surface, ensuring good initial coating quality.

[0175] Step 2: Modification and structural stabilization

[0176] Surfactant penetration depth: Detected by fluorescent labeling method, the surfactant penetration depth reaches 6 microns, which ensures the uniform distribution of the surfactant in the coating and enhances the modification effect of the coating.

[0177] Coating hardness after cooling: measured by a hardness tester, the hardness value is H=65, indicating that the coating structure is more stable and harder, and can adapt to higher operating requirements.

[0178] Step 3: Secondary coating, cross-linking and final molding

[0179] Bonding strength between new and old layers: Through the peel strength test, the average peel strength reached 14N / 25mm, proving that the new and old coatings are tightly bonded, improving the overall mechanical strength.

[0180] Chemical bond formation after UV irradiation: Infrared spectroscopy analysis confirmed the formation of new chemical bonds, which further enhanced the overall performance of the coating, especially its stability in high temperature environments.

[0181] It can be seen from the above experimental data that the release paper prepared according to the process flow in "Example 3" has excellent performance in high temperature stability, mechanical strength, surface smoothness, dimensional accuracy, chemical resistance and demolding performance. In particular, after specific ultraviolet light irradiation and secondary heating treatment, the combination between the new and old coatings is tighter, which significantly improves the overall performance of the release paper. In addition, the introduction of new surfactants and the adjustment of ultraviolet light irradiation parameters have further improved the mechanical strength and long-term high temperature stability of the release paper in extreme high temperature environments, making it suitable for more demanding application scenarios, such as electronic component manufacturing, medical equipment packaging and other high-demand fields.

[0182] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for preparing chemically synthesized release paper, characterized in that: include: A mixed solution containing a siloxane compound and an organic solvent is coated on the surface of the substrate, and then a heating treatment is performed to volatilize the organic solvent and preliminarily cure the coating; Introducing a nonionic surfactant to modify the coating surface, applying pressure to ensure uniform distribution of the surfactant, and then cooling to ambient temperature to stabilize the coating structure; A solution containing different silicone components is coated again, and secondary heating is performed to promote the combination of the new layer and the original layer. Ultraviolet light is applied to promote the formation of chemical bonds, and the finished release paper is obtained by cutting.

2. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The organic solvent consists of acetone and isopropanol, the volume ratio of the two is 3:7, and the ratio of the organic solvent to the siloxane compound is 90:10-95:

5.

3. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The conditions of the heating treatment are: the heating temperature is 80°C-120°C.

4. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The nonionic surfactant is polyoxyethylene sorbitan monooleate, and its addition amount is 0.5%-1.5% of the coating weight.

5. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The applied pressure is set in the range of 0.5 MPa-2 MPa.

6. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The step of cooling the coating structure to ambient temperature to stabilize the coating structure includes: a cooling rate not exceeding 10° C. per minute.

7. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The second coating of the solution containing different silicone components comprises: The siloxane content in the coating solution is more than 20% higher than that of the first use.

8. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The secondary heating is performed to promote the combination of the new layer and the original layer, comprising: The heating time lasts from 10 minutes to 30 minutes.

9. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The conditions for the ultraviolet light irradiation are: the ultraviolet light intensity is set to 100 mW / cm2 to 300 mW / cm2.

10. The process for preparing a chemically synthesized release paper according to claim 1, characterized in that: The dimensional tolerance of the finished release paper does not exceed ±0.5 mm.

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