Continuous manufacturing of PIR foam or PUR foam and PIR foam or PUR foam manufactured thereby

Abstract

The present invention relates to a continuous manufacturing technology for PIR (Polyisocyanurate) foam or PUR (Polyurethane) foam. More specifically, the invention relates to a continuous manufacturing method for PIR foam or PUR foam and a PIR foam manufactured thereby, which can prevent the problem of adhesive applied to the lower perforated nonwoven sheet leaking outward through the perforations and transferring to the steel plate portion of the manufacturing equipment in a double belt line process for continuously foaming PIR foam or PUR foam using an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, and the PIR foam or PUR foam manufactured thereby.

Description

Technology Field

[0001] The present invention relates to a continuous manufacturing technology for PIR (Polyisocyanurate) foam or PUR (Polyurethane) foam. More specifically, the invention relates to a continuous manufacturing method for PIR foam or PUR foam and a PIR foam manufactured thereby, which can prevent the problem of adhesive applied to the lower perforated nonwoven sheet leaking outward through the perforations and transferring to the steel plate portion of the manufacturing equipment in a double belt line process for continuously foaming PIR foam or PUR foam using an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, and the PIR foam or PUR foam manufactured thereby. Background Technology

[0003] In general, PIR foam or PUR foam is widely used in various industrial fields, such as building insulation, sandwich panels, and insulation structures for refrigeration and freezing, due to its excellent thermal insulation, lightweight properties, and processability.

[0004] These PIR or PUR foams can be manufactured using a continuous double belt line, in which foaming raw materials are supplied between the upper and lower sheets and continuously foamed to produce a laminated foam product.

[0005] Meanwhile, there are cases where a non-woven fabric sheet perforated into an upper sheet and a lower sheet is used, considering the product's surface characteristics, adhesion, or relationship with subsequent processes. In this case, some of the adhesive applied to the inner surface of the lower perforated non-woven fabric sheet may leak to the outer surface of the lower perforated non-woven fabric sheet through the perforations.

[0006] However, if the leaked adhesive described above is directly transferred to the steel plate portion of the manufacturing equipment, contamination of the equipment occurs, which may make continuous production difficult or lead to production stoppages for cleaning. Furthermore, the transfer and re-attachment of the adhesive may degrade the quality of the product surface and raise concerns about defects such as voids, warping, and surface unevenness.

[0007] Therefore, in the continuous manufacturing process of PIR foam or PUR foam using perforated nonwoven sheets, there is a need to develop a technology that can improve both continuous productivity and product quality by preventing the transfer of adhesive to the manufacturing equipment even if it leaks out through the perforations. Prior art literature

[0009] Korean Published Patent No. 10-2024-0173873 The problem to be solved

[0010] The objective of the present invention is to provide a continuous manufacturing method and a production apparatus capable of preventing the transfer of at least a portion of the adhesive applied to the inner surface of the lower perforated nonwoven sheet to the steel plate portion of the manufacturing equipment, even if the adhesive leaks outward through the perforations, in a process for continuously manufacturing PIR foam or PUR foam using an upper perforated nonwoven sheet and a lower perforated nonwoven sheet.

[0011] The objective of the present invention is to provide a continuous manufacturing method and production apparatus for PIR foam or PUR foam that can improve the problems of contamination, cleaning, production interruption, and increased maintenance costs resulting from the transfer of adhesives to the equipment.

[0012] The objective of the present invention is to provide a continuous manufacturing method and production apparatus for PIR foam or PUR foam that can improve the smoothness and appearance quality of a product by reducing cavities, curvature, and surface non-uniformity on the product surface caused by adhesive leakage. means of solving the problem

[0014] A continuous manufacturing method for PIR foam or PUR foam according to the present invention may include: (a) a step of preparing an upper perforated nonwoven sheet and a lower perforated nonwoven sheet; (b) a step of applying an adhesive to the inner surface of the lower perforated nonwoven sheet; (c) a step of supplying a foamable foam raw material between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet; (d) a step of placing a support plate equipped with a release film including a release layer on the outer surface side of the lower perforated nonwoven sheet; and (e) a step of continuously foaming the PIR foam or PUR foam in a state in which the adhesive is prevented from being transferred to the steel plate portion of the manufacturing facility by the support plate equipped with the release film, even if at least a portion of the adhesive leaks outward through the perforations of the lower perforated nonwoven sheet.

[0015] Preferably, the perforation diameter of the upper perforated nonwoven sheet and the lower perforated nonwoven sheet may be 0.1 mm to 0.3 mm.

[0016] Preferably, in step (b) above, the amount of adhesive applied may be 355 g / m² to 2631 g / m².

[0017] Preferably, the release film may include a PET substrate layer and a silicone-based release layer.

[0018] Preferably, the process control temperature of the above continuous manufacturing method may be 55℃ to 60℃.

[0019] Preferably, the support plate may be placed on the outer side of the lower perforated nonwoven sheet in the section before the upper perforated nonwoven sheet and the lower perforated nonwoven sheet enter the double belt line.

[0020] A production apparatus for PIR foam or PUR foam according to another embodiment of the present invention comprises: a double belt line for conveying an upper perforated nonwoven sheet and a lower perforated nonwoven sheet; an adhesive application unit for applying an adhesive to the lower perforated nonwoven sheet; a raw material supply unit for supplying a foamed foam raw material between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet; and a base plate equipped with a release film disposed on the outer side of the lower perforated nonwoven sheet to prevent the adhesive leaking through the perforations of the lower perforated nonwoven sheet from being transferred to the steel plate portion of the manufacturing equipment, wherein the base plate is configured to be detachably fixed to the steel plate portion, and the release film may include a PET substrate layer and a silicone-based release layer.

[0021] A PIR foam or PUR foam according to another embodiment of the present invention can be produced by the continuous manufacturing method described above. Effects of the invention

[0023] According to the present invention, in a continuous manufacturing process of PIR foam or PUR foam using an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, even if at least a portion of the adhesive applied to the inner surface of the lower perforated nonwoven sheet leaks outward through the perforations, the adhesive can be prevented from being transferred to the steel plate portion of the manufacturing equipment by a support plate equipped with a release film.

[0024] In addition, according to the present invention, contamination of the steel plate portion of the manufacturing facility can be reduced, thereby reducing the frequency of production interruptions for cleaning and improving continuous productivity.

[0025] In addition, according to the present invention, the transfer and reattachment of the adhesive are suppressed, thereby reducing cavities, curvature, and surface non-uniformity on the product surface, and thus improving the smoothness and appearance quality of the PIR foam or PUR foam.

[0026] In addition, according to the present invention, the improvement in the stability of the manufacturing process has the effect of reducing defect rates, returns, reproduction, additional transportation and maintenance costs, etc.

[0027] In addition, according to the present invention, manufacturing efficiency can be increased and waste of resources and energy reduced through the improvement of continuous productivity and product quality.

[0028] In addition, according to the present invention, the laminated PIR foam or PUR foam according to the present invention can form an interfacial bonding structure through perforations between the surface material and the foam core depending on the application of a perforated surface material, so it may be advantageous to achieve effects such as void improvement, physical property enhancement, and dimensional stability improvement. Brief explanation of the drawing

[0030] FIG. 1 is a flowchart of a continuous manufacturing method for PIR foam or PUR foam according to one embodiment of the present invention. Figure 2 is a photograph of the visual observation results of the Type 2 No. 2 flame-retardant product family. Figure 3 is a table of the physical property measurement results of the Type 2 No. 2 flame retardant product family. Figure 4 is a table of dimensional change measurement results for the Type 2 No. 2 flame-retardant product family. Figure 5 shows the results of visual observation of the Type 1 No. 3 vinyl product family. Figure 6 is a table of the physical property measurement results of the Type 1 No. 3 vinyl product family. Figure 7 is a table of measurement results for the dimensional change of the Type 1 No. 3 vinyl product family. FIG. 8 is an electron microscope image of a Type 2 No. 2 rigid polyurethane foam insulation material with a perforated surface material according to one embodiment of the present invention, showing the cross-section and surface structure. Figure 9 is an electron microscope image of a PIR foam or PUR foam with a non-perforated surface material applied according to a comparative example. Specific details for implementing the invention

[0031] The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, actions, and / or elements to the mentioned components, steps, actions, and / or elements.

[0032] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the "first component" mentioned below may be the "second component" within the technical scope of the present invention.

[0033] Furthermore, in describing the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the invention, such detailed description is abbreviated or omitted.

[0035] Continuous manufacturing method of PIR foam or PUR foam

[0036] FIG. 1 is a flowchart of a continuous manufacturing method for PIR foam or PUR foam according to one embodiment of the present invention. Hereinafter, the description will be given with reference to FIG. 1.

[0038] (a) Step of preparing an upper perforated nonwoven sheet and a lower perforated nonwoven sheet

[0039] First, a continuous manufacturing method according to one embodiment of the present invention may include the step (s1) of preparing an upper perforated nonwoven sheet and a lower perforated nonwoven sheet.

[0040] Here, the upper perforated nonwoven sheet and the lower perforated nonwoven sheet may each be a nonwoven sheet having a plurality of perforations formed therein. The perforations may be formed in a uniform or non-uniform pattern on the nonwoven sheet and may be set considering the adhesive properties in subsequent processes, bonding properties with foaming raw materials, and surface characteristics of the final product.

[0041] Preferably, the perforation diameter of the upper perforated nonwoven sheet and the lower perforated nonwoven sheet may be 0.1 mm to 0.3 mm. It should be noted that if the perforation diameter is smaller than 0.1 mm, the adhesive and bonding characteristics may be limited, and conversely, if it exceeds 0.3 mm, the amount of external leakage of the adhesive described later may increase, thereby increasing the possibility of contamination of the manufacturing equipment.

[0042] The above step (a) can be understood not merely as a step of supplying a sheet, but as a step of establishing basic conditions that affect the possibility of adhesive leakage and the stability of the foaming process in a subsequent step.

[0044] (b) Step of applying adhesive to the inner surface of the lower perforated nonwoven sheet

[0045] Next, the continuous manufacturing method of the present invention may include the step (s2) of applying an adhesive to the inner surface of the lower perforated nonwoven sheet. Here, “inner surface” may mean a surface facing the upper perforated nonwoven sheet and a surface that comes into contact with the foamed foam raw material.

[0046] Such adhesives can be applied to improve the bonding strength between the lower perforated nonwoven sheet and the subsequent foam layer, and to ensure the structural stability and interlayer adhesion of the final product.

[0047] Preferably, in step (b), the amount of adhesive applied to the lower perforated nonwoven sheet may be 355 g / m² to 2631 g / m². If the amount of adhesive applied is less than 355 g / m², it may be difficult to secure the necessary adhesive performance, and conversely, if it exceeds 2631 g / m², the adhesive may leak excessively outward through the perforations of the lower perforated nonwoven sheet, causing equipment contamination and surface defects.

[0049] (c) A step of supplying foaming material between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet.

[0050] Subsequently, the continuous manufacturing method of the present invention may include a step (s3) of supplying a foamed foam raw material between an upper perforated nonwoven sheet and a lower perforated nonwoven sheet.

[0051] These foaming foam raw materials may be reactive compositions for forming PIR foam or PUR foam, and may be supplied between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet while they move continuously along a double belt line.

[0052] The foaming material supplied in step (c) is subsequently reacted and foamed within a double belt line to form a foam core, and finally, a PIR foam or PUR foam product laminated with an upper perforated nonwoven sheet and a lower perforated nonwoven sheet can be manufactured. This step (c) is not merely a step of introducing foaming material, but also a step that enables the applied adhesive to perform a substantial bonding function.

[0054] (d) A step of placing a support plate equipped with a release film on the outer side of the lower perforated nonwoven fabric sheet.

[0055] The above continuous manufacturing method may include the step (s4) of placing a base plate having a release film including a release layer on the outer side of the lower perforated nonwoven fabric sheet.

[0056] Here, the “outer side” refers to the side opposite to the inner side where the adhesive is applied, and may be the side in the direction corresponding to the steel plate part of the manufacturing equipment. That is, the lower perforated nonwoven sheet may be positioned to come into contact with the adhesive and the foamed foam raw material on the inner side, and to correspond to the support plate according to the present invention on the outer side.

[0057] These support plates are placed on the outer side of the lower perforated nonwoven sheet and can serve to prevent adhesive escaping outward through the perforations from coming into direct contact with the main body of the manufacturing equipment.

[0058] Preferably, the support plate can be placed on the outer side of the lower perforated nonwoven sheet in the section before the upper perforated nonwoven sheet and the lower perforated nonwoven sheet enter the double belt line. Accordingly, the adhesive can be blocked in advance before reaching the actual equipment body.

[0059] The surface of such a base plate may be provided with a release film including a release layer.

[0060] Preferably, the release film may comprise a PET substrate layer and a silicone-based release layer. The PET substrate layer may provide physical support, dimensional stability, and heat resistance, and the silicone-based release layer may provide non-stick properties and release properties for adhesives.

[0061] In addition, such a base plate may be placed on a steel plate portion of the manufacturing equipment or configured to be detachably fixed to a steel plate portion. Accordingly, even after prolonged use, a worker can easily separate, replace, or maintain the base plate or release film.

[0063] (e) A step of continuously foaming PIR foam or PUR foam while preventing the transfer of adhesive.

[0064] Subsequently, the continuous manufacturing method of the present invention may include a step (s5) of continuously foaming a PIR foam or a PUR foam in a state in which the adhesive is prevented from being transferred to the steel plate portion of the manufacturing equipment by a base plate equipped with a release film, even if at least a portion of the adhesive leaks outward through the perforations of the lower perforated nonwoven sheet.

[0065] Specifically, in step (b), the adhesive applied to the inner surface of the lower perforated nonwoven sheet may partially escape to the lower outer surface through the perforations during the process of supplying the foamed raw material and continuous conveying in step (c). However, in the present invention, the leakage adhesive may be prevented from directly contacting or adhering to the steel plate portion of the manufacturing equipment by means of a support plate equipped with a pre-placed release film in step (d).

[0066] In other words, step (e) is significant in that it is not merely a simple foaming step, but a step in which foaming is performed continuously while the transfer of the adhesive to the equipment is controlled. This reduces contamination of the manufacturing equipment, decreases the need for cleaning the steel plate section or stopping the production line, and consequently improves continuous productivity.

[0067] Furthermore, since the phenomenon of the adhesive transferring to the equipment body and then reattaching to the product side can be suppressed, voids, curvature, and surface non-uniformity on the surface of the finally manufactured PIR foam or PUR foam can be reduced. Accordingly, the smoothness and appearance quality of the product can be improved.

[0068] Here, the process control temperature of the manufacturing method may be 55°C to 60°C. A process control temperature within this range may be set by comprehensively considering the reactivity of the foaming material, the fluidity of the adhesive, the bonding state with the sheet, and the continuous foaming stability.

[0070] Production device for PIR foam or PUR foam

[0071] A production apparatus for PIR foam or PUR foam according to another embodiment of the present invention may include a double belt line for conveying an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, an adhesive application unit for applying an adhesive to the lower perforated nonwoven sheet, a raw material supply unit for supplying a foamed foam raw material between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet, and a support plate having a release film disposed on the outer side of the lower perforated nonwoven sheet to prevent the adhesive leaking through the perforations of the lower perforated nonwoven sheet from being transferred to the steel plate of the manufacturing equipment.

[0072] Such a base plate can be configured to be detachably fixed to a steel plate, and the release film may include a PET substrate layer and a silicone-based release layer. By blocking and controlling leaked adhesive on the outer surface of the lower perforated nonwoven sheet, this production device can simultaneously achieve prevention of equipment contamination and improvement of continuous productivity.

[0073] Meanwhile, redundant parts in the configuration or description applied to the production device of PIR foam or PUR foam according to another embodiment of the present invention will be omitted.

[0075] PIR foam or PUR foam

[0076] A PIR foam or PUR foam according to another embodiment of the present invention may have a laminated structure in which a PIR foam or PUR foam core is formed between an upper perforated nonwoven sheet and a lower perforated nonwoven sheet.

[0077] In this case, an interface structure can be formed in which the PIR foam or PUR foam penetrates into the surface material through the perforations of the lower perforated nonwoven fabric sheet. This interface structure can be distinguished from the case where a surface material without perforations is applied, and can affect the bonding state and interface shape between the surface material and the foam core.

[0079] Experimental Examples and Results

[0080] Below, to verify the effects of the present invention, a product to which a perforated nonwoven fabric is applied was evaluated by comparing it with a product to which a general nonwoven fabric or a non-perforated nonwoven fabric is applied. This experiment was conducted to verify the improvement of voids, changes in physical properties, and changes in dimensional stability after low-temperature storage according to the perforation structure.

[0082] <Preparation Example>

[0083] In this experiment, specimens were prepared for the Type 2 No. 2 flame-retardant product family and the Type 1 No. 3 vinyl product family with different perforations and perforation sizes.

[0084] (1) In the flame-retardant product family of type 2, no. 2, a comparison group using a general nonwoven fabric, Manufacturing Example 1 using a 0.1 mm perforated nonwoven fabric, and Manufacturing Example 2 using a 0.2 mm perforated nonwoven fabric were prepared.

[0085] (2) In the Type 1 No. 3 vinyl product family, a control group with non-perforated nonwoven fabric and Manufacturing Example 3 with 0.1 mm perforated nonwoven fabric were prepared.

[0086] In addition, for the composition used, the Type 2 No. 2 product family applied a formulation ratio of Polyol 100, MDI 185, Silicon 1, Cat.1 0.85, Cat.2 3.6, and CP 15.4.

[0088] Evaluation Method

[0089] Visual observation, physical property measurement, and dimensional change measurement were performed on each specimen.

[0090] The degree of urethane foam leakage and the pattern of void formation were confirmed through visual observation based on the presence and size of perforations.

[0091] The material properties were evaluated by measuring longitudinal compressive strength, width compressive strength, height compressive strength, flexural failure, thermal conductivity, density, and core density.

[0092] Dimensional change evaluation was performed by measuring the length, width, height, banding, and diagonal dimensions after storing the specimens at -18℃ for 4 days and comparing the degree of shrinkage after low-temperature storage.

[0094] <Experimental Results - Type 2 No. 2 Flame Retardant Product Group>

[0095] Referring to Figure 2, visual inspection of the Type 2 No. 2 flame-retardant product family revealed that as the perforation size increased, the urethane foam leaked out more smoothly, and the voids were improved.

[0096] Referring to Figure 3, the wide-direction compressive strength and thermal conductivity showed a tendency to improve in Preparation Examples 1 and 2 compared to the general nonwoven fabric. Specifically, the wide-direction compressive strength of the general nonwoven fabric was 91.97 kPa, but it improved to 128.41 kPa for Preparation Example 1 and 136.11 kPa for Preparation Example 2. In addition, the thermal conductivity improved to 0.02135 W / m·K for the nonwoven fabric of Preparation Example 1 and 0.02104 W / m·K for the nonwoven fabric of Preparation Example 2, compared to 0.02226 W / m·K for the general nonwoven fabric.

[0097] Referring to Fig. 4, in the evaluation of dimensional changes after low-temperature storage, the nonwoven fabrics of Example 1 and Example 2 showed a tendency for improved dimensional stability in the width direction compared to the general nonwoven fabric. In particular, it was found that the shrinkage rate was improved even when stored at -18℃ for 4 days.

[0099] <Experimental Results - Type 1 No. 3 Vinyl Product Group>

[0100] Referring to Figure 5, in the Type 1 No. 3 vinyl product line, there was no significant visual difference immediately after production, but differences in voids and shrinkage were confirmed depending on the presence or absence of perforations after 4 days of frozen storage.

[0101] Referring to Figure 6, the results of the physical property evaluation showed that the compressive strength in the width direction, the compressive strength in the height direction, and the flexural failure strength were improved in the group using the 0.1 mm perforated nonwoven fabric of Manufacturing Example 3 compared to the non-perforated nonwoven fabric. Specifically, the compressive strength in the width direction increased from 133.61 kPa under the non-perforated condition to 150.89 kPa under the perforated condition, and the compressive strength in the height direction increased from 293.42 kPa to 371.79 kPa. Flexural failure also improved from 30.6 N to 41.4 N.

[0102] Referring to Fig. 7, the dimensional change evaluation results showed that the group with the perforated nonwoven fabric of Manufacturing Example 3 exhibited a tendency for the wide direction shrinkage rate to decrease compared to the group with the non-perforated nonwoven fabric.

[0104] Electron microscope image

[0105] Referring to FIGS. 8 and 9, it can be seen that the comparative example with a non-perforated surface material and the embodiment with a perforated surface material exhibit different interface characteristics in cross-section and on the surface. In particular, in the embodiment with a perforated surface material, an interface structure can be formed in which the foam core penetrates or extends toward the surface material through the perforations of the lower perforated nonwoven sheet, and this can be understood as a distinguishing feature from the comparative example with a non-perforated surface material.

[0107] <Discussion of Experimental Results>

[0108] As such, in the case of Manufacturing Examples 1, 2, and 3 using perforated nonwoven fabric, compared to the control group using general nonwoven fabric or non-perforated nonwoven fabric, voids were improved, physical properties centered on the wide direction were improved, and dimensional stability after low-temperature storage showed a tendency to improve.

[0109] In particular, in the Class 2 No. 2 flame-retardant product family, as the perforation size increased, the leakage of urethane foam increased, and a clear improvement in voids was observed; furthermore, as wide-direction cell flowability improved, wide-direction compressive strength and thermal conductivity were improved. In addition, in the Class 1 No. 3 vinyl product family, wide-direction strength and low-temperature shrinkage characteristics were improved by applying a perforated structure. This can be interpreted as the perforated structure having a positive effect on cell flowability and internal structural stability during foaming.

[0110] Meanwhile, in the present invention, while applying such a perforated structure, a support plate equipped with a release film is placed on the outer surface of the lower perforated nonwoven sheet, thereby preventing the problem of adhesive that may leak through the perforations from transferring to the steel plate portion of the manufacturing equipment. Therefore, the present invention can secure the effect of improving physical properties and dimensional stability through the application of perforated nonwoven fabric, while simultaneously achieving the effects of preventing contamination of the manufacturing equipment and improving continuous productivity.

[0111] Furthermore, a comparison of electron microscope images of perforated and non-perforated surfaces reveals that when a perforated surface is applied, the interface between the surface and the foam core in the cross-section and on the surface is formed differently from that of a non-perforated surface. In particular, in products using perforated surfaces, an interfacial structure may be formed due to the penetration or extension of the foam through the perforations; this suggests differences in bonding characteristics and internal structure depending on the perforation structure.

[0113] Although the present invention has been described with reference to preferred embodiments above, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims.

Claims

Claim 1 A method for continuously manufacturing PIR foam or PUR foam in a double belt line that continuously conveys an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, comprising: (a) a step of preparing the upper perforated nonwoven sheet and the lower perforated nonwoven sheet; (b) a step of applying an adhesive to the inner surface of the lower perforated nonwoven sheet; (c) a step of supplying a foamable foam raw material between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet; (d) a step of placing a support plate equipped with a release film including a release layer on the outer surface side of the lower perforated nonwoven sheet; and (e) a step of continuously foaming the PIR foam or PUR foam in a state in which the adhesive is prevented from being transferred to the steel plate portion of the manufacturing facility by the support plate equipped with the release film, even if at least a portion of the adhesive leaks outward through the perforations of the lower perforated nonwoven sheet. Claim 2 A continuous manufacturing method for PIR foam or PUR foam according to claim 1, characterized in that the perforation diameter of the upper perforated nonwoven sheet and the lower perforated nonwoven sheet is 0.1 mm to 0.3 mm. Claim 3 A continuous manufacturing method for PIR foam or PUR foam according to claim 1, characterized in that, in step (b), the amount of adhesive applied is 355 g / m² to 2631 g / m². Claim 4 A continuous manufacturing method for PIR foam or PUR foam according to claim 1, wherein the release film comprises a PET substrate layer and a silicone-based release layer. Claim 5 A continuous manufacturing method for PIR foam or PUR foam according to claim 1, characterized in that the process control temperature of the continuous manufacturing method is 55℃ to 60℃. Claim 6 A continuous manufacturing method of PIR foam or PUR foam according to claim 1, wherein the support plate is positioned on the outer side of the lower perforated nonwoven sheet in the section before the upper perforated nonwoven sheet and the lower perforated nonwoven sheet enter the double belt line. Claim 7 A production apparatus for PIR foam or PUR foam, comprising: a double belt line for conveying an upper perforated nonwoven sheet and a lower perforated nonwoven sheet; an adhesive application unit for applying an adhesive to the lower perforated nonwoven sheet; a raw material supply unit for supplying a foamed foam raw material between the upper perforated nonwoven sheet and the lower perforated nonwoven sheet; and a base plate equipped with a release film disposed on the outer side of the lower perforated nonwoven sheet to prevent adhesive leaking through the perforations of the lower perforated nonwoven sheet from transferring to the steel plate portion of the manufacturing equipment, wherein the base plate is configured to be detachably fixed to the steel plate portion, and the release film comprises a PET substrate layer and a silicone-based release layer. Claim 8 A PIR foam characterized by being produced by a continuous manufacturing method according to claim 1, having a laminated structure in which a PIR foam core is formed between an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, and including an interface structure in which the PIR foam penetrates toward the surface material side through the perforations of the lower perforated nonwoven sheet.

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