Temperature-responsive high-temperature-resistant release paper and preparation method thereof

Abstract

The invention discloses temperature response type high-temperature-resistant release paper and a preparation method thereof. The release paper comprises a first release layer, a resin isolation layer, a base material layer, a resin punching layer, a temperature-sensitive layer and a second release layer which are sequentially stacked. The PNIPAAm temperature-sensitive layer is additionally arranged on the outer side of the perforated resin isolation layer, when the temperature-sensitive layer is lower than LCST (lowest critical compatibility temperature), molecular chains of the PNIPAAm temperature-sensitive layer are in a stretched state and are large in size, the perforated holes can be blocked, and water circulation can be prevented, when the temperature is higher than LCST, the molecular chains of PNIPAAm are in a contracted state and are small in size, and the perforated holes can be blocked by the PNIPAAm temperature-sensitive layer. Moisture can freely enter and exit through the exhaust holes, so that the use of the release paper is not influenced, and higher temperature can be resisted; the method can solve the problem that the water content of the paper is greatly changed due to the fact that the perforated release paper is influenced by external humidity.

Description

Technical Field

[0001] This invention relates to the field of release materials, and in particular to a temperature-responsive high-temperature resistant release paper and its preparation method. Background Technology

[0002] Currently, the mainstream high-temperature resistant coated release paper on the market uses the following methods to increase the operating temperature: Method 1: Controlling the paper's moisture content to increase the Vicat softening point of the resin release layer, preventing deformation due to water expansion and resin softening. However, a drawback is that low paper moisture content can lead to problems such as breakage and powdering during subsequent use. A further solution 2: Adding vents to the resin release layer. This allows water vapor to dissipate through the vents during high-temperature use without affecting performance. However, the vents can absorb moisture, leading to uncontrolled moisture content in the release paper. Furthermore, the release agent can penetrate through the vents, creating holes in the release layer and causing poor release. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a temperature-responsive high-temperature release paper and its preparation method, addressing the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a temperature-responsive high-temperature resistant release paper, comprising a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer stacked in sequence.

[0005] Preferably, both the resin isolation layer and the resin perforated layer are prepared by coating using one or more of HDPE, LDPE, and LLDPE as raw materials.

[0006] Preferably, the resin perforated layer is formed by pressing with a perforating roller during the coating process to create a porous structure.

[0007] Preferably, a perforated roller with a surface roughness of 4-10 μm is used to press and form a porous structure during the coating process.

[0008] Preferably, the temperature-sensitive layer is obtained by coating with PNIPAAM coating liquid and then curing it. PNIPAAM coating liquid is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 50-200: 12-50: 5-20: 150-600.

[0009] Preferably, the PNIPAAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; The thickness of the temperature-sensitive layer is 2-4 μm.

[0010] Preferably, the substrate layer is base paper with a basis weight of 60-120 g / m². 2 .

[0011] This invention also provides a method for preparing the temperature-responsive high-temperature resistant release paper as described above, comprising the following steps: S1. Perform corona treatment on the upper and lower surfaces of the substrate layer respectively; S2. A resin isolation layer is prepared by coating the upper surface of the substrate layer with one or more of HDPE, LDPE, and LLDPE as raw materials. S3. Using one or more of HDPE, LDPE, and LLDPE as raw materials, a coating treatment is applied to the lower surface of the substrate layer. During the coating process, a perforating roller is used to press and form a porous structure to prepare a resin perforated layer. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer, and form a temperature-sensitive layer after curing; S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0012] Preferably, the raw materials for preparing the resin isolation layer are a mixture of HDPE and LDPE in a mass ratio of 1:1; the coating amount of the resin isolation layer is 10-40 g / m². 2 .

[0013] Preferably, the raw materials for preparing the resin perforated layer are a mixture of HDPE:LDPE:LLDPE in a mass ratio of 1:1:2, and the coating amount of the resin perforated layer is 10-40 g / m². 2 .

[0014] The beneficial effects of this invention are: This invention provides a temperature-responsive, high-temperature resistant release paper. The invention adds a PNIPAAM temperature-sensitive layer to the outside of the perforated resin isolation layer. Below the LCST (Lowest Critical Compatibility Temperature), the molecular chains of the PNIPAAM layer are in an extended state, resulting in a larger volume that can block the perforations and prevent moisture flow. Above the LCST, the molecular chains of the PNIPAAM layer are in a contracted state, resulting in a smaller volume, allowing moisture to freely enter and exit through the vent holes without affecting the use of the release paper, and enabling it to withstand higher temperatures. This invention solves the problem of large changes in the moisture content of perforated release paper due to external humidity. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of the temperature-responsive high-temperature release paper of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1—First release layer; 2—Resin isolation layer; 3—Substrate layer; 4—Resin perforated layer; 5—Temperature-sensitive layer; 6—Second release layer. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to embodiments, so that those skilled in the art can implement it based on the description.

[0018] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0019] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, the materials and reagents used in the following examples are commercially available. For examples where specific conditions are not specified, conventional conditions or conditions recommended by the manufacturer are followed. For reagents or instruments whose manufacturers are not specified, they are all commercially available products.

[0020] Reference Figure 1 This invention provides a temperature-responsive high-temperature resistant release paper, comprising a first release layer 1, a resin isolation layer 2, a substrate layer 3, a resin perforated layer 4, a temperature-sensitive layer 5, and a second release layer 6, stacked sequentially. The temperature-responsive high-temperature resistant release paper of this invention forms a dense sealing layer at the LCST (Lowest Critical Compatibility Temperature) to isolate moisture; above the LCST temperature, moisture on the substrate can be dissipated through the temperature-sensitive layer without affecting the use of the release paper, thus solving the weather resistance problem of perforated high-temperature resistant release paper.

[0021] In a preferred embodiment, both the resin isolation layer and the resin perforated layer are prepared by coating with one or more of HDPE, LDPE, and LLDPE as raw materials.

[0022] In a preferred embodiment, the resin perforated layer is formed by pressing with a perforating roller during the coating process to create a porous structure.

[0023] In a preferred embodiment, a perforated roller with a surface roughness of 4-10 μm is used to press and form a porous structure during the coating process.

[0024] In a preferred embodiment, the temperature-sensitive layer is obtained by coating with PNIPAAM coating liquid and then curing it. PNIPAAM coating liquid is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 50-200: 12-50: 5-20: 150-600.

[0025] In a preferred embodiment, the PNIPAMAm coating solution is a mixture of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300.

[0026] In a preferred embodiment, the thickness of the temperature-sensitive layer is 2-4 μm.

[0027] In a preferred embodiment, the substrate layer is base paper with a basis weight of 60-120 g / m². 2 .

[0028] This invention also provides a method for preparing the above-mentioned temperature-responsive high-temperature resistant release paper, comprising the following steps: S1. Perform corona treatment on the upper and lower surfaces of the substrate layer respectively; S2. A resin isolation layer is prepared by coating the upper surface of the substrate layer with one or more of HDPE, LDPE, and LLDPE as raw materials. S3. Using one or more of HDPE, LDPE, and LLDPE as raw materials, a coating treatment is applied to the lower surface of the substrate layer. During the coating process, a perforating roller is used to press and form a porous structure to prepare a resin perforated layer. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer, and form a temperature-sensitive layer after curing; S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0029] In a preferred embodiment, the resin isolation layer is prepared from a mixture of HDPE and LDPE in a mass ratio of 1:1; the coating weight of the resin isolation layer is 10-40 g / m². 2 .

[0030] In a preferred embodiment, the resin isolation layer has a coating amount of 25 g / m². 2 .

[0031] In a preferred embodiment, the raw materials for preparing the resin perforated layer are a mixture of HDPE:LDPE:LLDPE in a mass ratio of 1:1:2, and the coating amount of the resin perforated layer is 10-40 g / m². 2 .

[0032] In a preferred embodiment, the coating amount of the resin perforated layer is 25 g / m². 2 .

[0033] The above is the general concept of the present invention. Based on this, detailed embodiments and comparative examples are provided below to further illustrate the present invention.

[0034] The main sources of raw materials in the following examples and comparative examples are explained below: HDPE is 8008H, manufactured by Dushanzi Petrochemical; LDPE is 955, manufactured by Hanwha; LLDPE is L712, manufactured by Singapore Polyolefins; carboxylated poly(N-isopropylacrylamide) is produced by Xi'an Qiyue Biotechnology Co., Ltd.; amino resin is Luwipal 066, manufactured by BASF; terephthalic acid is P420255, manufactured by Aladdin Biochemical.

[0035] The release agent is a commercially available, conventional UV-curing release agent.

[0036] Example 1 A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 2μm. The PNIPAMAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; this formula is referred to as Formula A. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0037] Example 2 A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 3μm. The PNIPAMAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; this formula is referred to as Formula A. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0038] Example 3 A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 4μm. The PNIPAMAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; this formula is referred to as Formula A. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0039] Comparative Example 1 A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 1.5μm. The PNIPAMAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; this formula is referred to as Formula A. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0040] Comparative Example 2: A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 5μm. The PNIPAMAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; this formula is referred to as Formula A. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0041] Comparative Example 3 A temperature-responsive, high-temperature resistant release paper includes a first release layer, a first resin isolation layer, a substrate layer, a second resin isolation layer, a temperature-sensitive layer, and a second release layer stacked sequentially. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The first resin isolation layer is obtained after cooling. S3. A mixture of HDPE:LDPE:LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer, and after cooling, a second resin isolation layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 2μm. The PNIPAMAm coating solution is a mixture composed of carboxyl-poly(N-isopropylacrylamide): amino resin: terephthalic acid: butanone in a mass ratio of 100:25:10:300; this formula is referred to as Formula A. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0042] Comparative Example 4 A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the resin perforated layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0043] Comparative Example 5 A temperature-responsive, high-temperature resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin perforated layer, a temperature-sensitive layer, and a second release layer, which are sequentially stacked. Its preparation method includes the following steps: S1, using a weight of 100g / m 2 The base paper is used as the substrate layer, and the upper and lower surfaces of the base paper are subjected to corona treatment with a corona power of 5kw. The base paper is also coated with a resin layer 2 and a resin isolation layer (perforated 3). S2. A coating treatment is performed on the upper surface of the substrate layer using a mixture of HDPE and LDPE in a 1:1 mass ratio as the raw material, with a coating amount of 25 g / m². 2 The resin isolation layer is prepared after cooling; S3. A mixture of HDPE, LDPE, and LLDPE in a mass ratio of 1:1:2 is used as raw material to perform a coating treatment on the lower surface of the substrate layer. During the coating process, a perforating roller with a surface roughness Sa of 5μm is used to press and form a porous structure. The coating amount of the resin perforated layer is 25g / m². 2 After cooling, a resin perforated layer is prepared. S4. Apply PNIPAAM coating liquid to the lower surface of the resin perforated layer and cure at 120℃ for 45s to form a temperature-sensitive layer with a thickness of 2μm. Among them, the PNIPAMAm coating solution is a mixture of carboxyl-poly(N-isopropylacrylamide) and butanone in a mass ratio of 100:300; this formula is referred to as Formula B. S5. Apply release agent to the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively. After UV curing, the first release layer and the second release layer are formed respectively, and finally the temperature-responsive high-temperature resistant release paper is obtained.

[0044] The release papers prepared in the examples and comparative examples were subjected to relevant performance tests, and the test results are shown in Table 1 below: Table 1 The 25-degree water immersion test mainly checks whether the PNIPAAM coating can block the drilling points below the LCST temperature. If water droplets are present, it is considered a failure and the result is NG; otherwise, it is OK. The 80-degree curing moisture test mainly assesses whether the PNIPAAM coating undergoes a volume phase transformation above the LCST temperature, whether the pores open, and whether moisture can be easily released. At 80 degrees Celsius, a large amount of moisture will be lost, which is reflected in the reduction of moisture.

[0045] The test results show that below the LCST temperature, the release paper with the added PNIPAAM coating can completely block the perforation points and form a dense surface. Above the LCST temperature, PNIPAAM undergoes a phase transition, and moisture can be easily evaporated through the perforation points without causing the PE film to bubble due to water turning into water vapor.

[0046] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. A temperature-responsive high-temperature resistant release paper, characterized by, The temperature-responsive high-temperature-resistant release paper comprises a first release layer, a resin isolation layer, a substrate layer, a resin punching layer, a temperature-sensitive layer and a second release layer which are sequentially arranged.

2. The temperature-responsive high-temperature-resistant release paper according to claim 1, wherein The resin isolation layer and the resin punching layer are both prepared by using a mixture of one or more of HDPE, LDPE and LLDPE as raw material through film coating.

3. The temperature-responsive high-temperature-resistant release paper according to claim 2, characterized by The resin punching layer is pressed to form a pore structure during the film coating process by using a punching roller.

4. The temperature-responsive high-temperature-resistant release paper according to claim 3, characterized by The pore structure is pressed during the film coating process by using a punching roller with a surface roughness of 4-10 μm.

5. The temperature-responsive high-temperature-resistant release paper according to claim 1, wherein The temperature-sensitive layer is obtained by coating a PNIPAAm coating liquid and then curing, wherein the PNIPAAm coating liquid is a mixture of carboxyl-poly(N-isopropyl acrylamide), amino resin, p-toluene sulfonic acid and butanone in a mass ratio of 50-200:12-50:5-20:150-600.

6. The temperature-responsive high-temperature-resistant release paper according to claim 5, wherein The PNIPAAm coating liquid is a mixture of carboxyl-poly(N-isopropyl acrylamide), amino resin, p-toluene sulfonic acid and butanone in a mass ratio of 100:25:10:300; The thickness of the temperature-sensitive layer is 2-4 μm.

7. The temperature-responsive high-heat-resistant release paper according to claim 1, wherein The substrate layer is base paper, the base paper has a grammage of 60-120 g / m 2 .

8. A method of producing the temperature-responsive high-temperature-resistant release paper according to any one of claims 1 to 7, characterized by, The temperature-responsive high-temperature-resistant release paper is prepared by the following steps: S1, performing corona treatment on the upper and lower surfaces of the substrate layer respectively; S2, performing film coating treatment on the upper surface of the substrate layer by using a mixture of one or more of HDPE, LDPE and LLDPE as raw material to prepare the resin isolation layer; S3, performing film coating treatment on the lower surface of the substrate layer by using a mixture of one or more of HDPE, LDPE and LLDPE as raw material, and pressing to form a pore structure during the film coating process to prepare the resin punching layer; S4, coating the PNIPAAm coating liquid on the lower surface of the resin punching layer, and forming the temperature-sensitive layer after curing; S5, coating the release agent on the upper surface of the resin isolation layer and the lower surface of the temperature-sensitive layer respectively, and forming the first release layer and the second release layer after curing, and finally obtaining the temperature-responsive high-temperature-resistant release paper.

9. The method for preparing temperature-responsive high-temperature resistant release paper according to claim 8, characterized in that, The raw material for preparing the resin isolation layer is a mixture of HDPE and LDPE in a mass ratio of 1:1; the resin isolation layer has a film coating amount of 10-40 g / m 2 .

10. The method for preparing temperature-responsive high-temperature resistant release paper according to claim 8, characterized in that, The raw material for preparing the resin perforated layer is a mixture of HDPE:LDPE:LLDPE in a mass ratio of 1:1:2, and the resin perforated layer has a film coating amount of 10-40 g / m 2 .

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