A preparation process of chemically synthesized release paper

Abstract

The present invention belongs to the technical field of release paper processing, and specifically relates to a process for preparing chemically synthesized release paper. The present invention not only enhances the uniform distribution of the coating by introducing a non-ionic surfactant modification treatment and combining it with a specific ultraviolet light irradiation step, but also promotes the formation of new chemical bonds, 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 release properties over a wider temperature range. Ultimately, this innovative preparation process makes release paper products more suitable for use in demanding high-temperature environments, expanding their application potential.

Description

Technical Field

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

[0002] Release paper is widely used in various industrial and commercial applications, such as food packaging, labeling, and electronic component protection. Traditional release paper preparation typically involves coating a substrate with a silicone layer, which imparts the desired release properties. However, existing preparation methods often focus on optimizing performance at room temperature, but lack consideration for stability in high-temperature environments.

[0003] To enhance the release performance of release paper, a mixed solution containing a silicone compound and an organic solvent is typically coated on the substrate surface. The solvent is then evaporated and the coating is initially cured by heating. Surfactants may then be added to improve the coating's uniformity and surface properties. While this method provides good initial release performance, the release paper's performance tends to degrade in high-temperature environments, resulting in a loss of its original release performance and impacting product quality and application.

[0004] The present invention addresses the aforementioned issues in the prior art and aims to solve the problem of unstable performance of release paper in high-temperature environments. Specifically, traditional preparation processes fail to fully consider the impact of high temperatures on the chemical structure of release paper, thus limiting its reliability in a wider range of applications. 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, expands its application potential, and solves the problems in the prior art raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solution: 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 solidify 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 a second heating is performed to promote the bonding of the new layer with 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 isopropyl alcohol 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 cooling the coating structure at a rate not exceeding 10° C. per minute.

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

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

[0015] Preferably, the ultraviolet light irradiation condition 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 in the present invention has the following advantages:

[0018] By introducing a nonionic surfactant modification treatment and combining it with a specific UV irradiation step, the present invention not only enhances the uniform distribution of the coating but also promotes the formation of new chemical bonds, significantly improving the stability and durability of the release paper under high-temperature conditions. Furthermore, the combination of secondary heating and UV irradiation ensures a close bond between the new and old coatings, further enhancing the overall performance of the finished release paper, enabling it to maintain excellent release properties over a wider temperature range. Ultimately, this innovative preparation process makes release paper products more suitable for use in demanding high-temperature environments, expanding their 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 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 embodiments described are only part of the embodiments of the present invention, not all of 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 of 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 The preparation process of a chemically synthesized release paper shown includes:

[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 isopropyl alcohol in a volume ratio of 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 form a smooth, low-surface-energy coating, giving the release paper excellent non-adhesive properties when in contact with other materials.

[0027] Organic solvents (acetone and isopropyl alcohol): Used to dissolve the silicone compound, ensuring it can be evenly applied to the substrate surface. A mixture of acetone and isopropyl alcohol was chosen because the two solvents evaporate at different rates—acetone evaporates faster and isopropyl alcohol evaporates slower. This combination allows the coating to set quickly initially while allowing sufficient time for the silicone to be evenly distributed, thus ensuring coating quality.

[0028] The ratio of organic solvent to silicone compound is 90:10 to 95:5. This ratio is chosen to balance the coating's fluidity and drying speed. A higher proportion of organic solvent improves solution fluidity for ease of application, while an appropriate amount of silicone ensures effective coating curing and the performance of the final product. This ratio provides both good coating properties and rapid curing after heat treatment, resulting in a stable, strong coating structure.

[0029] Organic solvent composition and volume ratio (acetone:isopropyl alcohol = 3:7): This ratio takes into account the different evaporation rates of the two solvents and their response to ambient temperature changes. Acetone evaporates quickly, accelerating initial film formation; isopropyl alcohol evaporates more slowly, extending working time and promoting more uniform distribution of the silicone on the substrate. This ratio has been experimentally verified to ensure good coating properties while also achieving rapid drying and initial curing of the coating.

[0030] Heating conditions (80°C-120°C): The selected temperature range effectively volatilizes the organic solvent, preventing residual residue from affecting subsequent steps, while also preventing premature complete curing or decomposition of the siloxane compound due to excessive temperatures. Lower temperatures (e.g., 80°C) are suitable for heat-sensitive substrates, while higher temperatures (e.g., near 120°C) 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 example, by precisely controlling the ratios of various ingredients and process parameters, aims to produce a release paper capable of maintaining high performance and stability in high-temperature environments. This method not only improves production efficiency but also ensures that the finished product possesses excellent release properties and durability, making it particularly suitable for applications requiring high-temperature resistance.

[0032] Step 2: Introduce a non-ionic surfactant to modify the coating surface and apply pressure to ensure uniform distribution of the surfactant. Then cool to ambient temperature to stabilize the coating structure. The cooling rate does not exceed 10°C per minute.

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

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

[0035] Ingredient Function: Polyoxyethylene sorbitan monooleate (Tween 80), a highly effective nonionic surfactant, forms a protective film on the surface of silicone coatings. It not only enhances the coating's smoothness but also improves its release properties, particularly in high-temperature environments, helping to maintain coating stability and mold release performance.

[0036] Addition levels range from 0.5% to 1.5% by weight of the coating: This range has been optimized to effectively improve coating uniformity and smoothness without unduly impacting the basic properties of the silicone coating. Lower addition levels (e.g., 0.5%) are suitable for applications requiring less demanding surface modification, while higher addition levels (e.g., 1.5%) are more suitable for applications requiring superior surface properties, such as high-precision printing or processing of specialized materials.

[0037] Nonionic surfactant content: Selecting a dosage of 0.5%-1.5% is based on empirically validated best practices. A dosage that is too low may not significantly improve the coating's surface properties, while a dosage that is too high may alter the coating's structure and even affect the release properties of the final product. Therefore, this range ensures that the surfactant is fully dispersed and performs its function while maintaining the core benefits of the silicone coating.

[0038] Modification with a nonionic surfactant: Introducing a surfactant into the pre-cured silicone coating further improves the coating's surface properties, enhancing its anti-blocking properties and durability. This treatment also reduces defects caused by uneven substrate surfaces, ensuring higher quality and consistency in the finished release paper.

[0039] Applied Pressure (0.5MPa-2MPa): By applying appropriate pressure, the surfactant is more evenly distributed across the coating surface, ensuring uniform coverage throughout the coating. A lower limit of 0.5MPa ensures sufficient pressure to promote active agent penetration, while an upper limit of 2MPa avoids the risk of damaging the coating. This range of pressure values ​​facilitates active agent distribution without negatively impacting the coating structure.

[0040] Cool to ambient temperature at a rate not exceeding 10°C per minute: Controlling the cooling rate is crucial for maintaining the stability of the coating structure. A slower cooling process (no more than 10°C per minute) allows for a gradual release of internal stresses in the coating, preventing cracks or other structural damage caused by rapid cooling. This step ensures that the coating maintains its excellent physical and chemical properties after cooling, providing a stable release effect, especially when used under high temperature conditions.

[0041] In summary, this example aims to produce a release paper that maintains high performance and stability even in high-temperature environments by precisely controlling the amount of nonionic surfactant added, applying appropriate pressure, and rationally 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, making it particularly suitable for applications that must withstand high temperatures and complex environmental conditions.

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

[0043] Specifically, the silicone solution to be re-applied:

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

[0045] Siloxane content increase: The choice of a siloxane content of at least 20% above the initial application ensures the new layer provides additional protection and support without compromising the fundamental properties of the existing coating. Experimentation has proven that this incremental range meets the performance enhancement requirements without excessive coating thickness or unnecessary cost increases.

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

[0047] Time Control: The primary purpose of secondary heating is to promote a strong bond between the new and old silicone layers. Heating times are set between 10 and 30 minutes to ensure sufficient reaction time for a strong chemical bond to form without excessively extending production cycles. Shorter times (e.g., 10 minutes) are suitable for rapid curing, while longer times (e.g., 30 minutes) ensure a more thorough crosslinking reaction and are suitable for applications requiring higher adhesion strength.

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

[0049] Light Intensity: UV light irradiation is an effective means of promoting chemical bond formation. Selecting a UV light intensity between 100 and 300 mW / cm² ensures that the active components react at the appropriate energy level, avoiding incomplete reactions due to insufficient intensity and damaging the material structure due to excessive intensity. Lower light intensities (e.g., 100 mW / cm²) are suitable for sensitive materials or when gentle handling is required; higher intensities (e.g., 300 mW / cm²) can accelerate the reaction process and improve production efficiency.

[0050] Cut to obtain the finished release paper with a dimensional tolerance of no more than ±0.5 mm:

[0051] Precision Cutting: The final step involves precise cutting of the prepared release paper to ensure dimensional consistency and accuracy in the finished product. Maintaining a dimensional tolerance of ±0.5 mm demonstrates the high demands placed on product quality and ensures the release paper's adaptability and reliability in practical applications. This stringent dimensional control is particularly important in high-precision processing applications, such as electronic component manufacturing and medical device packaging.

[0052] In summary, this example aims to produce a release paper with excellent high-temperature stability, high-strength bonding, and high-precision dimensional control by optimizing the composition ratio of the siloxane solution, rationally arranging the secondary heating time and UV irradiation intensity, and strictly adhering to the final cutting precision requirements. 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, making it particularly suitable for industrial applications that are temperature-sensitive or require delicate processing.

[0053] The following experimental data demonstrates the specific parameters and test results for each key step in the preparation of chemically synthesized release paper. This data is 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 Compound: A specific type of silicone used to provide release properties.

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

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

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

[0060] Experimental steps and parameters:

[0061] Step 1: Preliminary coating and curing;

[0062] parameter Test value Ratio of organic solvent to silicone compound 92:8 Heating temperature 100℃ Initial curing time 15 minutes

[0063] Step 2: Modification and structural stabilization

[0064]

[0065]

[0066] Step 3: Secondary coating, cross-linking and final molding

[0067] parameter Test value Silicone 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

[0068] Performance test results

[0069]

[0070]

[0071] The experimental data above demonstrates that the release paper prepared according to the process described in Example 1 exhibits excellent high-temperature stability, mechanical strength, surface smoothness, dimensional accuracy, chemical resistance, and mold release properties. In particular, after the specific UV irradiation and secondary heating treatment, the bond between the new and old coatings becomes even tighter, significantly improving the overall performance of the release paper. These results validate the effectiveness of this preparation process and demonstrate that the finished release paper is suitable for applications requiring high temperatures and complex environmental conditions.

[0072] Example 2

[0073] This example provides a process for preparing chemically synthesized release paper, aiming to further optimize its performance stability in extreme high-temperature environments while enhancing its mechanical strength and dimensional accuracy. By adjusting key process parameters and material composition ratios, improved coating uniformity and stronger adhesion between the new and old layers are achieved, providing a more reliable solution for high-temperature applications.

[0074] Specific steps

[0075] Step 1: Preliminary coating and curing

[0076] Mixed solution preparation:

[0077] A mixed solution containing a siloxane compound and an organic solvent is applied to the surface of the substrate.

[0078] The organic solvent consists of acetone and isopropyl alcohol, and the volume ratio is adjusted to 4:6 to adapt to different volatilization rate requirements.

[0079] The ratio of organic solvent to silicone compound was set at 92:8 to optimize the balance between fluidity and drying speed.

[0080] Heat treatment:

[0081] 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.

[0082] Step 2: Modification and structural stabilization

[0083] Introduction of nonionic surfactants:

[0084] 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.

[0085] Apply pressure:

[0086] 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.

[0087] Cooling process:

[0088] 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.

[0089] Step 3: Secondary coating, cross-linking and final molding

[0090] Re-apply:

[0091] Apply a solution containing different silicone components, in which the silicone 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.

[0092] Secondary heating:

[0093] 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 strong chemical bond.

[0094] UV exposure:

[0095] 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.

[0096] Cutting finished product:

[0097] 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.

[0098] Through the above process flow, this example successfully produced a release paper with excellent high-temperature stability, high-strength bonding strength, and high-precision dimensional control. This product is not only suitable for conventional industrial environments but also maintains excellent release and mechanical properties under extreme high-temperature conditions, providing a reliable option for demanding applications such as electronic component manufacturing and medical device packaging. Furthermore, through precise control of various process parameters, this example demonstrates how to flexibly adjust the preparation method to achieve optimal product performance based on specific application scenarios.

[0099] The following is detailed experimental data, showing the specific parameters and test results of each key step in the preparation of 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.

[0100] Experimental conditions and materials:

[0101] Substrate: standard release paper substrate;

[0102] Silicone Compound: A specific type of silicone used to provide release properties.

[0103] Organic solvent: mixture of acetone and isopropyl alcohol in a volume ratio of 4:6.

[0104] Nonionic surfactant: polyoxyethylene sorbitan monooleate (Tween 80).

[0105] Ultraviolet irradiation equipment: a UV light source with adjustable intensity.

[0106] Experimental steps and parameters:

[0107] Step 1: Preliminary coating and curing:

[0108] parameter Test value Ratio of organic solvent to silicone compound 92:8 Heating temperature 100℃ Initial curing time 20 minutes

[0109] Step 2: Modification and structural stabilization:

[0110] parameter Test value Nonionic surfactant addition amount 1.0% of coating weight Apply pressure 1.5MPa Cooling rate 8℃ per minute

[0111] Step 3: Secondary coating, cross-linking and final molding:

[0112] parameter Test value Silicone 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

[0113] Performance test results:

[0114]

[0115] Special test results:

[0116]

[0117] Detailed experimental data records:

[0118] Step 1: Preliminary coating and curing

[0119] The coating thickness after initial curing is: the average thickness is 15 microns, and the standard deviation is ±1 micron.

[0120] Coating uniformity after initial curing: Through optical microscope inspection, there is no obvious unevenness on the coating surface.

[0121] Step 2: Modification and structural stabilization

[0122] 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.

[0123] The hardness of the coating after cooling was measured by a hardness tester, and the hardness value was H=60, indicating that the coating structure was stable and hard.

[0124] Step 3: Secondary coating, cross-linking and final molding

[0125] Bonding strength between new and old layers: Through peel strength test, the average peel strength reaches 12N / 25mm, proving that the new and old coatings are tightly bonded.

[0126] Chemical bond formation after UV irradiation: Infrared spectroscopy analysis confirmed the formation of new chemical bonds, which enhanced the overall performance of the coating.

[0127] The experimental data above demonstrates that the release paper prepared according to the process described in Example 2 demonstrates excellent high-temperature stability, mechanical strength, surface smoothness, dimensional accuracy, chemical resistance, and demolding properties. In particular, after the specific UV irradiation and secondary heating treatment, the bond between the new and old coatings becomes even tighter, significantly enhancing the release paper's overall performance. Furthermore, the optimized process parameters further enhance the release paper's mechanical strength and long-term high-temperature stability in extreme high-temperature environments, making it suitable for even more demanding applications.

[0128] Example 3

[0129] This example aims to further optimize the performance stability of release paper in high-temperature environments. It also explores the use of different types of nonionic surfactants and adjusts UV irradiation parameters to enhance the mechanical strength and dimensional accuracy of the finished product. By introducing new surfactants and optimizing key process parameters, improved coating uniformity and stronger adhesion between the new and old layers are achieved, providing a more reliable solution for high-temperature applications.

[0130] Specific steps

[0131] Step 1: Preliminary coating and curing

[0132] Mixed solution preparation:

[0133] A mixed solution containing a siloxane compound and an organic solvent is applied to the surface of the substrate.

[0134] The organic solvent consists of acetone and isopropyl alcohol, and the volume ratio is adjusted to 2:8 to adapt to different volatilization rate requirements and optimize the initial film formation speed.

[0135] The ratio of organic solvent to silicone compound is set at 94:6 to ensure that the solution has good fluidity, facilitates construction operation, and ensures effective curing of the coating.

[0136] Heat treatment:

[0137] 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.

[0138] Step 2: Modification and structural stabilization

[0139] Introduction of nonionic surfactants:

[0140] 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.

[0141] Apply pressure:

[0142] 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 tightness of the coating.

[0143] Cooling process:

[0144] 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.

[0145] Step 3: Secondary coating, cross-linking and final molding

[0146] Re-apply:

[0147] Apply a solution containing different silicone components, in which the silicone content is 30% higher than the first application, 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.

[0148] Secondary heating:

[0149] The heating time is extended to 30 minutes to ensure that the new and old layers of silicone have enough time to tightly combine and form a strong chemical bond, which is particularly suitable for application scenarios with extremely high requirements for adhesion strength.

[0150] UV exposure:

[0151] 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.

[0152] Cutting finished product:

[0153] 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.

[0154] Through the above process flow, this example successfully produced 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 release and mechanical properties under extreme high-temperature conditions, providing a reliable option for demanding applications such as electronic component manufacturing and medical device packaging. Furthermore, through the precise control of various process parameters, particularly the introduction of novel surfactants and adjustment of UV irradiation parameters, this example demonstrates how the preparation method can be flexibly adjusted to specific application scenarios to achieve optimal product performance and application results.

[0155] The following is detailed experimental data, showing the specific parameters and test results of each key step in the preparation of 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.

[0156] Experimental conditions and materials:

[0157] Base material: standard release paper base material

[0158] Silicone Compound: A specific type of silicone used to provide release properties.

[0159] Organic solvent: mixture of acetone and isopropyl alcohol in a volume ratio of 2:8.

[0160] Nonionic surfactant: polyoxyethylene (20) stearate.

[0161] Ultraviolet irradiation equipment: a UV light source with adjustable intensity.

[0162] Experimental steps and parameters:

[0163] Step 1: Preliminary coating and curing:

[0164] parameter Test value Ratio of organic solvent to silicone compound 94:6 Heating temperature 110℃ Initial curing time 15 minutes

[0165] Step 2: Modification and structural stabilization:

[0166]

[0167]

[0168] Step 3: Secondary coating, cross-linking and final molding:

[0169] parameter Test value Silicone 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

[0170] Performance test results:

[0171]

[0172]

[0173] Special test results (optimization points for Example 3)

[0174]

[0175] Detailed experimental data records:

[0176] Step 1: Preliminary coating and curing

[0177] The coating thickness after initial curing is: the average thickness is 18 microns, and the standard deviation is ±1 micron.

[0178] Coating uniformity after initial curing: Through optical microscope inspection, there is no obvious unevenness on the coating surface, ensuring good initial coating quality.

[0179] Step 2: Modification and structural stabilization

[0180] 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.

[0181] Coating hardness after cooling: measured by a hardness tester, the hardness value is H=65, indicating that the coating structure is more stable and hard, and can adapt to higher operating requirements.

[0182] Step 3: Secondary coating, cross-linking and final molding

[0183] Bonding strength between new and old layers: Through peel strength testing, the average peel strength reached 14N / 25mm, proving that the new and old coatings are tightly bonded, improving the overall mechanical strength.

[0184] Chemical bond formation after UV irradiation: Infrared spectroscopy confirmed the formation of new chemical bonds, further enhancing the overall performance of the coating, especially its stability in high-temperature environments.

[0185] The experimental data above demonstrates that the release paper prepared according to the process described in Example 3 exhibits excellent high-temperature stability, mechanical strength, surface smoothness, dimensional accuracy, chemical resistance, and demolding properties. In particular, after specific UV irradiation and secondary heating, the bond between the new and old coatings becomes even tighter, significantly enhancing the release paper's overall performance. Furthermore, the introduction of novel surfactants and adjustments to UV irradiation parameters further enhance the release paper's mechanical strength and long-term high-temperature stability in extreme high-temperature environments, making it suitable for more demanding applications such as electronic component manufacturing, medical device packaging, and other demanding fields.

[0186] 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, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or 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 scope of protection 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 applied to the surface of the substrate, and then heated to volatilize the organic solvent and preliminarily cure the coating; A nonionic surfactant is introduced to modify the coating surface, and pressure is applied to ensure uniform distribution of the active agent, followed by cooling to ambient temperature to stabilize the coating structure; A solution containing different silicone components is applied again, and secondary heating is performed to promote the bonding of the new layer with the original layer. Ultraviolet light is applied to promote the formation of chemical bonds, and the finished release paper is obtained by cutting; The organic solvent is composed of acetone and isopropyl alcohol in a volume ratio of 3:7, and the ratio of the organic solvent to the siloxane compound is 90:10-95:5; The conditions of the heating treatment are: heating temperature is 80℃-120℃; The nonionic surfactant is polyoxyethylene sorbitan monooleate, and its addition amount is 0.5%-1.5% of the coating weight; The applied pressure is set in the range of 0.5MPa-2MPa; The cooling to ambient temperature to stabilize the coating structure includes: a cooling rate not exceeding 10°C per minute; The re-coating of the solution containing different siloxane components includes: the siloxane content in the coating solution is more than 20% higher than that in the first application; The secondary heating is performed to promote the combination of the new layer and the original layer, and the heating time is continued for 10 minutes to 30 minutes.

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

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

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