KR102555366B1 - Composite insulation for LNG carrier cargo using glass fiber chop and its manufacturing method - Google Patents

Abstract

The present invention is a single-layer structure or a multi-layer structure in which a foam layer is formed so that glass fiber chop is distributed in a foam layer formed by simultaneously spraying glass fiber chop and polyurethane stock solution. It relates to a composite cold insulator for a cargo hold of an LNG carrier using glass fiber chop, characterized in that it is a composite cold insulator, and a manufacturing method thereof.
In addition, even when LNG leaks according to the present invention, the composite insulator in a low-temperature state serves as a bridge in which the glass fiber chops connect the foam cells of the insulator, so that the foam cells of the composite insulator are not easily separated even in the rapid temperature change of the cargo hold, resulting in durability. This is excellent, and there is an effect that the composite insulation is not easily damaged even in the sudden temperature change of the LNG cargo hold.
In addition, even in case of leakage of LNG according to the present invention, the composite insulator in a low temperature state has a primary foam layer (F1), which is a low-density foam layer with a density of 50 to 120 kg/m ³ and a high-density foam layer with a density of 80 to 180 kg/m ³ . It is a multi-layer structure composed of a secondary foam layer (F2), which is a foam layer. The durability and mechanical properties of the composite insulation material are improved by the secondary foam layer, the weight of the composite insulation material is reduced by the primary foam layer, and heat insulation is achieved. It improves performance and has the effect of saving raw materials for foam materials.
In addition, even in case of leakage of LNG according to the present invention, the composite cold insulator in a low temperature state is a multi-layered layer in which nonwoven fabric and glass fiber chop are laminated on the upper surface of the primary foam layer and then a secondary foam layer is formed using a secondary polyurethane stock solution By manufacturing a composite insulator with a structure, the secondary polyurethane stock solution penetrates into the fine space formed in the nonwoven fabric and is bonded to the upper surface of the primary foam layer, thereby improving the adhesive strength between the primary foam layer and the secondary foam layer. In the future, it is expected that demand will increase as a composite cold insulation material used for the cargo holds of LNG carriers.

Description

Composite insulation for LNG carrier cargo using glass fiber chop and its manufacturing method}

The present invention relates to a composite cold insulator for a cargo hold of an LNG carrier using glass fiber chops and a method for manufacturing the same, and specifically, glass fiber chops in a foam layer formed by simultaneously spraying glass fiber chops and a polyurethane stock solution ) of a single-layer structure or multi-layer structure in which a foam layer is formed so that As a composite insulator, the foam cells of the composite insulator are not easily separated even in the case of rapid temperature changes in the cargo hold, so durability is excellent, and the composite insulator is not easily damaged even in the sudden temperature change of the LNG cargo hold. LNG using glass fiber chops It relates to a composite cold insulation material for a cargo hold of a carrier and a method for manufacturing the same.

Demand, production, and export of LNG (Liquified Natural Gas) are continuously increasing worldwide, and the number of LNG carriers is expected to continue to increase in the future. Currently, Korea is leading the global LNG carrier construction market, but the technology of the insulated cargo tank (hereinafter referred to as 'cargo hold') that accommodates liquefied natural gas in LNG carriers is still dependent on foreign companies.

In addition, the cargo hold, which is an important technology for LNG carriers, is divided into a membrane type tank integrated with the ship's structure and an independent tank manufactured independently of the ship's structure and supported by a support structure. It is constructed according to the standards of the International Maritime Organization (IMO).

On the other hand, looking at the insulator used in the cargo hold of the conventional LNG carrier, the structure of the cargo hold of the LNG carrier as known in Patent Document 1, as shown in FIG. 111 is formed, a secondary barrier 112 is formed on the outside of the primary barrier 111, and on the outer surface of the secondary barrier 112, insulators 120 in the form of unit panels are closely disposed and fixed made up of a structure

In addition, as shown in FIG. 2, the insulator used in the cargo hold of the LNG carrier as known in Patent Document 2 is in the form of particles in the process of curing the polyurethane foam 20 in a liquid state during the normal polyurethane foam manufacturing process. A cold insulator manufactured by mixing the airgel 21 of is known.

However, the insulator used in the cargo hold of an LNG carrier is a material used in a cargo hold that maintains a low-temperature state. When the insulator repeatedly contracts and expands according to temperature changes before and after receiving LNG in the cargo hold, a long time elapses. Accordingly, as the coupled foam cells are separated, a gap is generated between the foam cells and the adjacent foam cells, and cool air in the cargo hold leaks to the outside, so that the insulation performance may deteriorate.

Republic of Korea Patent Registration No. 10-1477839 (published on December 30, 2014) International Maritime Organization regulation Type A type independent LNG carrier cargo hold Republic of Korea Patent Registration No. 10-0740767 (published on July 19, 2007) Insulation material for LNG carrier insulation tank

The present invention is an invention derived as a way to improve the problems described above, and a foam layer so that glass fiber chop is distributed in a foam layer formed by spraying glass fiber chop and polyurethane stock solution at the same time. of a single-layer or multi-layer structure formed by As a composite insulator, glass fiber chops serve as a bridge connecting the foam cells of the insulator, so the foam cells of the composite insulator are not easily separated even in the rapid temperature change of the cargo hold, so the durability is excellent. An object of the present invention is to provide a composite insulator for a cargo hold of an LNG carrier using glass fiber chops, characterized in that the insulator is not easily damaged, and a method for manufacturing the same.

And even in case of leakage of LNG according to the present invention, the composite insulator in a low temperature state has a primary foam layer (F1), which is a low-density foam layer with a density of 50 to 120 kg/m ³ and a high-density foam layer with a density of 80 to 180 kg/m ³ . composed of a secondary foam layer (F2), which is a layer As a multi-layer structure, the durability and mechanical properties of the composite insulator are improved by the secondary foam layer, the weight of the composite insulator is reduced by the primary foam layer, the insulation performance is improved, and the raw material of the foam material is reduced. Another task is to provide a composite cold insulator for a cargo hold of an LNG carrier using glass fiber chops, characterized in that it is effective, and a method for manufacturing the same.

In addition, even in case of leakage of LNG according to the present invention, the composite cold insulator in a low temperature state is a multi-layered layer in which nonwoven fabric and glass fiber chop are laminated on the upper surface of the primary foam layer and then a secondary foam layer is formed using a secondary polyurethane stock solution By manufacturing a composite cold insulator with a structure, the secondary polyurethane stock solution penetrates into the microscopic space formed in the nonwoven fabric and is bonded to the upper surface of the primary foam layer, thereby improving the adhesion between the primary foam layer and the secondary foam layer. It is another task to provide a composite cold insulator for a cargo hold of an LNG carrier using glass fiber chops and a method for manufacturing the same.

According to the present invention, the manufacturing method of a composite cold insulating material for a cargo hold of an LNG carrier using glass fiber chops has two methods for manufacturing a cold insulating material layer in a single-layer structure or a multi-layer structure, and according to the structure of the cold insulating material layer, the first embodiment (single-layer structure) and the second embodiment (multilayer structure).

The method of manufacturing a single-layer composite cold insulation material for a cargo hold of an LNG carrier using glass fiber chops according to the first embodiment includes a release paper supply step (S100) of supplying the release paper 10 to a transfer conveyor (C); The glass fiber chop 20 and the polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the release paper 10 to form a mixture layer of the glass fiber chop and polyurethane stock solution so that the glass fiber chop is distributed in the polyurethane stock solution. Layer formation step (S200); a release paper supply step (S500′) of supplying and stacking a release paper 70 on the upper surface of the mixture layer; It is characterized in that a composite cold insulator for a cargo hold of a single layer structure is manufactured through.

In addition, the composite cold insulator of the single-layer structure for the cargo hold of an LNG carrier using glass fiber chops manufactured by the method of the first embodiment is foamed by foaming a mixture layer in which glass fiber chops 20 and polyurethane stock solution 30 are mixed. Layer (F); characterized in that it is a foam layer of a single layer structure consisting of.

In addition, the method for manufacturing a multi-layer composite cold insulator for a cargo hold of an LNG carrier using glass fiber chops according to the second embodiment includes a release paper supply step (S100) of supplying the release paper 10 to the transfer conveyor (C); The primary glass fiber chops 20 and the primary polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the release paper 10 so that the glass fiber chops are distributed in the polyurethane stock solution. A first mixture layer forming step of forming a mixture layer of the stock solution (S200); A non-woven fabric layer forming step (S300) of supplying and laminating a non-woven fabric 40 on the upper surface of the first mixture layer; The secondary glass fiber chops 20 and the secondary polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the nonwoven fabric layer to distribute the glass fiber chops in the polyurethane stock solution. a second mixture layer forming step of forming a mixture layer (S400); and a release paper supplying step (S500) of supplying and stacking release paper 70 on the upper surface of the secondary mixture layer; through which a multi-layer structure composite cold insulating material for a cargo hold is manufactured.

In addition, the composite cold insulator having a multi-layer structure for a cargo hold of an LNG carrier using glass fiber chops manufactured by the method of the second embodiment is a mixture of primary glass fiber chops 20 and primary polyurethane stock solution 30. A primary foam layer (F1) obtained by foaming the mixture layer; a non-woven fabric layer in which non-woven fabric 40 is laminated on the upper surface of the primary foam layer (F1) to be bonded to the secondary foam layer (F2); And a secondary foam layer (F2) in which a secondary mixture layer obtained by mixing secondary glass fiber chops (50) and primary polyurethane stock solution (60) is foamed on the upper surface of the nonwoven fabric (40); Characterized in that it is a foam layer.

Even in case of leakage of LNG according to the present invention, the composite insulator in a low temperature state has a single-layer structure in which a foam layer is formed so that glass fiber chops are distributed in a foam layer formed by spraying glass fiber chops and polyurethane stock solution at the same time or multi-layered As a composite insulator, glass fiber chops serve as a bridge connecting the foam cells of the insulator, so the foam cells of the composite insulator are not easily separated even in the rapid temperature change of the cargo hold, so the durability is excellent. There is an effect that the insulation material is not easily damaged.

And even in case of leakage of LNG according to the present invention, the composite insulator in a low temperature state has a primary foam layer (F1), which is a low-density foam layer with a density of 50 to 120 kg/m ³ and a high-density foam layer with a density of 80 to 180 kg/m ³ . It is a multilayer structure composed of a secondary foam layer (F2), which is a layer, and improves durability and mechanical properties of the composite insulator by the secondary foam layer, reduces the weight of the composite insulator by the primary foam layer, and has thermal insulation performance. and there is an effect of reducing the raw material of the foam material.

In addition, even in case of leakage of LNG according to the present invention, the composite cold insulator in a low temperature state is a multi-layered layer in which nonwoven fabric and glass fiber chop are laminated on the upper surface of the primary foam layer and then a secondary foam layer is formed using a secondary polyurethane stock solution By manufacturing a composite cold insulator with a structure, the secondary polyurethane stock solution penetrates into the microscopic space formed in the nonwoven fabric and is bonded to the upper surface of the primary foam layer, thereby improving the adhesion between the primary foam layer and the secondary foam layer. .

Therefore, the present invention is expected to increase demand as a composite coolant used for cargo holds of LNG carriers in the future due to the effects described above.

1 is a view showing a typical cross-sectional structure of a cargo hold of an LNG carrier.
2 is a view showing the cross-sectional structure of a conventional cold insulating material used in a cargo hold of an LNG carrier.
3 is a view showing a process of manufacturing a composite cold insulator of a single-layer structure for a cargo hold of an LNG carrier using glass fiber chops according to a first preferred embodiment of the present invention.
Figure 4 is a block diagram showing a process for manufacturing a single-layer composite cold insulation material for a cargo hold of an LNG carrier using glass fiber chops by the manufacturing process shown in Figure 3;
5 is a view showing a cross-sectional structure of a composite cold insulator having a single-layer structure for a cargo hold of an LNG carrier using glass fiber chops manufactured according to a first preferred embodiment of the present invention.
6 is a view showing a cross-sectional structure in a state in which the release paper is removed from the composite cold insulation material of the single-layer structure for the cargo hold of the LNG carrier of FIG. 5;
7 is a view showing a process of manufacturing a multi-layer composite cold insulation material for a cargo hold of an LNG carrier using glass fiber chops according to a second preferred embodiment of the present invention.
FIG. 8 is a block diagram showing a process for manufacturing a multi-layer composite cold insulation material for a cargo hold of an LNG carrier using glass fiber chops by the manufacturing process shown in FIG. 7;
9 is a view showing a cross-sectional structure of a multi-layered composite insulator for a cargo hold of an LNG carrier using glass fiber chops according to a second preferred embodiment of the present invention.
10 is a view showing a cross-sectional structure in a state in which the release paper is removed from the composite cold insulation material of the single-layer structure for the cargo hold of the LNG carrier of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings, and in the drawings and detailed description, detailed descriptions and illustrations of elements not directly related to the technical features of the present invention are omitted, Only technical configurations related to the present invention have been briefly shown or described.

The terminology described in the specification of the present invention, 'composite insulator for cargo holds of LNG carriers' refers specifically to 'composite insulation materials for cargo holds used in 'LNG carriers, etc.', and 'LNG carriers, etc.' refers to LNG carriers. Including LNG bunker ships, LNG propulsion ships, and, broadly, LNG onshore storage can also be included.

In drawings 3 and 7 attached to the specification of the present invention, a, j are release paper supply rollers, d are nonwoven fabric supply rollers, e, f, g are compression rollers for compressing the nonwoven fabric to the foam layer, k, l It is a compression roller that compresses the release paper to the cold insulation material. And A and B are PUR-CSM (Polyurethane Composite Spray Molding) spray devices, b and h are glass fiber chop spray devices, and c and i are polyurethane stock solution supply devices. In the above, the number of rollers such as the nonwoven fabric compression roller and the release paper compression roller may be appropriately adjusted.

According to the present invention, the manufacturing method of the composite insulator for the cargo hold of the LNG carrier using the glass fiber chop (hereinafter referred to as 'composite insulator for the cargo hold') has two methods of manufacturing the insulator layer in a single-layer structure or a multi-layer structure. According to the structure of the layer, it is divided into a first embodiment having a single-layer structure as shown in FIGS. 3 to 6 and a second embodiment having a multi-layer structure as shown in FIGS. 7 to 10.

As shown in FIGS. 3 and 4, the method for manufacturing a composite cold insulating material for a cargo hold having a single layer structure according to a first preferred embodiment of the present invention includes a release paper supply step (S100), a mixture layer forming step (S200), and a release paper supply step. Through (S500'), a composite cold insulator P for a cargo hold having a single-layer structure as shown in FIGS. 5 and 6 is manufactured.

In the manufacturing method of the composite cold insulating material for a cargo hold having a single layer structure according to the first embodiment, the step of supplying the release paper (S100), the step of forming a mixture layer (S200), and the step of supplying the release paper (S500') of the first embodiment are the release paper of the second embodiment. Since it is the same method as the supplying step (S100), the first mixture layer forming step (S200), and the release paper supplying step (S500), the composite coolant for cargo hold of the first embodiment and its manufacturing method will be described in detail in the description of the second embodiment below. Let's explain.

And, as shown in FIGS. 7 and 8, the method of manufacturing a composite cold insulator for a multi-layered cargo hold according to a second preferred embodiment of the present invention includes a release paper supply step (S100), a first mixture layer forming step (S200), Through the non-woven fabric layer forming step (S300), the secondary mixture layer forming step (S400), and the release paper supply step (S500), the multi-layer structure composite coolant P for cargo holds as shown in FIGS. 9 and 10 is manufactured. .

Hereinafter, a method for manufacturing a composite cold insulator for cargo holds having a multi-layer structure according to a second preferred embodiment of the present invention will be described in detail as follows.

In the release paper supply step (S100), the release paper 10 is supplied to the transfer conveyor (C) to form a release paper layer to prevent leakage of the primary mixture in which the primary glass fiber chops and the liquid primary polyurethane stock solution are mixed. As a step of forming a release paper layer, in this step, not only a release paper but also a kraft paper having release properties may be used.

The release paper supplying step (S100) is applied as it is to the first embodiment as well as the second embodiment.

The conveying conveyor (C) used in this step is preferably a device in which a plate is mounted on top of a roller of means such as a conveyor roller, but any means suitable for manufacturing polyurethane composite insulation that is foamed while being transported can be applied. there is.

In the first mixture layer forming step (S200), the first glass fiber chop 20 and the first polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the release paper 10 using the PUR-CSM spray device (A) This is a step of forming a first mixture layer on the upper surface of the release paper 10 by mixing the first glass fiber chops and the first polyurethane stock solution.

Specifically, in the first mixture layer forming step (S200), when the first glass fiber chops and the first polyurethane stock solution are sprayed at the same time, the glass fiber chops are evenly distributed and foamed while being mixed with the polyurethane stock solution. At this time, the first poly When the urethane stock solution 30 is foamed, the first mixture layer is formed so that the glass fiber chops 20 are uniformly distributed inside the first foam layer F1 while the gap between the glass fiber chops 20 widens according to the foaming ratio. This is the forming stage.

The primary mixture layer is foamed while moving along the traveling direction of the transfer conveyor (C) to form a primary foam layer (F1) as shown in FIGS. 9 and 10 .

In the present invention, the polyurethane stock solution (30, 60) means a mixture of polyol and isocyanate, which are polyurethane raw materials.

The mixture of polyol and isocyanate used in the present invention is a mixture used in general polyurethane synthesis, and is preferably selected from polyester polyol and polyether polyol, and the isocyanate compound is toluene diisocyanate, hexamethylene diisocyanate It is preferable to use isocyanate, isophorone diisocyanate, or diphenylmethane diisocyanate alone or in combination of two or more.

Therefore, in the first mixture layer forming step (S200) and the second mixture layer forming step (S400), when the glass fiber chop and the polyurethane stock solution are simultaneously sprayed by the PUR-CSM spray device, the glass fiber chop is mixed with the polyurethane stock solution As polyurethane is foamed by the reaction of a mixture of polyol, which is a polyurethane stock solution, and isocyanate, the gap between the glass fiber chops widens according to the foaming ratio, and the glass fiber chops are uniformly distributed inside the foam layer, forming a foam layer. .

And in the present invention, the content of the glass fiber chops (20, 50) contained in the primary foam layer (F1) and the secondary foam layer (F2) is preferably within the range of 5 to 15% by weight, but only within the specific range above It is not necessarily limited, and may be appropriately adjusted according to the needs of the consumer or the manufacturer.

The length of the glass fiber chop is preferably 10 to 30 mm, but is not necessarily limited to the specific range above, and may be appropriately adjusted according to the needs of the consumer or the manufacturer.

Also in the first embodiment, the content of glass fiber chops and the length of glass fiber chops are as defined above.

The first mixture layer forming step (S200) is performed by the same method as the mixture layer forming step (S200) of the first embodiment.

The non-woven fabric layer forming step (S300) is a step of supplying and laminating a non-woven fabric 40 on the upper surface of the primary mixture layer, and the non-woven fabric 40 supplied in this step is a primary polyurethane between the micropores formed in the non-woven fabric. As the stock solution and the secondary polyurethane stock solution permeate and foam, the primary foam layer (F1) and the secondary foam layer (F2) are integrally bonded.

Specifically, in this step, the nonwoven fabric 40 is laminated on the upper surface of the primary foam layer (F1), and then the secondary glass fiber chop 50 and the secondary polyurethane stock solution 60 are mixed in a subsequent step (S400). When the secondary mixture layer is foamed while moving along the moving direction of the conveyor (C), when the secondary foam layer (F2) as shown in FIGS. 9 and 10 is formed, the secondary polyurethane stock solution 60 is a nonwoven fabric. By penetrating into the microscopic space formed in (40) and bonding to the upper surface of the primary foam layer (F1), the adhesive force between the primary foam layer (F1) and the secondary foam layer (F2) is improved in the subsequent step, and primary foaming is performed. The layer (F1) and the secondary foam layer (F2) are integrally combined.

In the second mixture layer forming step (S400), the second glass fiber chop 50 and the second polyurethane stock solution 60 are applied to the upper surface of the nonwoven fabric 40 at the same time using the PUR-CSM spray device (B). This is a step in which the mixture of the secondary glass fiber chops and the secondary polyurethane stock solution is sprayed to form a secondary mixture layer on the upper surface of the nonwoven fabric 40.

The secondary mixture layer is foamed while moving along the moving direction of the transfer conveyor (C) to form a secondary foam layer (F2) as shown in FIGS. 9 and 10 .

The release paper supply step (S500) is a step of supplying and stacking the release paper 70 on the upper surface of the secondary mixture layer, wherein the secondary mixture layer is foamed while moving along the moving direction of the transfer conveyor (C). In order to protect the foam layer (F2), the release paper 70 is supplied and laminated on the upper surface of the secondary foam layer (F2).

The release paper supply step (S500) is performed in the same manner as the release paper supply step (S500') of the first embodiment.

Hereinafter, the composite insulator for a cargo hold manufactured by the manufacturing method of the composite insulator for a cargo hold according to the first embodiment (single-layer structure) and the second embodiment (multi-layer structure) will be described in detail as follows.

The composite cold insulator for a cargo hold having a single-layer structure manufactured according to the first embodiment of the present invention has a structure as shown in FIGS. It is characterized in that it is a foam layer of a single layer structure composed of a foam layer (F) in which

The foam layer (F) is preferably a foam layer having a density of 50 to 150 kg/m ³ , and the foam layer (F) using a polyurethane stock solution to uniformly distribute the glass fiber chops 20 in the foam layer (F). F), when the density of the foam layer (F) is less than the density defined above, there is a risk of deterioration in thermal insulation and durability performance, and when the density exceeds the density defined above, the foam There is a concern that a problem of heavy weight may occur.

In addition, the composite coolant for a multi-layered cargo hold manufactured according to the second embodiment of the present invention has a structure as shown in FIGS. A primary foaming layer (F1) in which a primary mixture layer mixed with is foamed; a non-woven fabric layer in which non-woven fabric 40 is laminated on the upper surface of the primary foam layer (F1) to be bonded to the secondary foam layer (F2); And a secondary foam layer (F2) in which a secondary mixture layer obtained by mixing secondary glass fiber chops (50) and primary polyurethane stock solution (60) is foamed on the upper surface of the nonwoven fabric (40); Characterized in that it is a foam layer.

In the composite insulators for cargo holds of the first and second embodiments, since the glass fiber chops 20 serve as a bridge connecting the foam cells of the insulator, the foam cells of the composite insulator are not easily separated even when the temperature of the LNG cargo hold changes rapidly. Therefore, the durability is excellent, and the composite cold insulation material is not easily damaged even in the sudden temperature change of the LNG cargo hold.

The primary foam layer (F1) is a low-density foam layer having a density of 50 to 120 kg/m ³ and serves to reduce the weight of a composite cold insulator for cargo holds, improve insulation performance, and reduce raw material costs of foam materials.

The secondary foam layer (F2) is a high-density foam layer having a density of 80 to 180 kg/m ³ , and the secondary foam layer (F2) serves to improve durability and mechanical properties of the composite insulator for a cargo hold.

When the density of the primary foam layer (F1) and the secondary foam layer (F2) is less than the above-limited density, there is a risk of deterioration in thermal insulation properties, durability and mechanical properties, and when the density exceeds the above-limited density In this case, there is a concern that a problem in that the weight of the foam becomes heavy.

In addition, when the composite insulator for a cargo hold is manufactured by the manufacturing method as shown in FIGS. 3 and 7, the outer surface of the foam layer of the composite insulator for a cargo hold is as shown in FIGS. 5 and 9. Similarly, the release papers 10 and 70 are laminated on the upper and lower surfaces, but when using a composite cold insulator for a cargo hold, the release papers 10 and 70 must be removed before use, so the release papers 10 and 70 It need not necessarily be included in the rights of the present invention.

For reference, in the present invention, the thickness of the primary foam layer (F1), the secondary foam layer (F2), and the nonwoven fabric 40 are not particularly limited, and may be appropriately adjusted according to the needs of the consumer or the manufacturer. .

As described above, the composite cold insulating material for a cargo hold of an LNG carrier using glass fiber chops according to a preferred embodiment of the present invention and its manufacturing method have been shown according to the above description and drawings, but this is only an example and the present invention Those skilled in the art will be able to understand that various changes and changes are possible within the range of not departing from the technical idea of .

10, 70: release paper
20, 50: glass fiber chop
30, 60: polyurethane stock solution
40: non-woven fabric
A, B: PUR-CSM spray device
C: transfer conveyor
P: Composite insulation for cargo holds of LNG carriers
F, F1, F2: polyurethane foam layer

Claims (8)

A release paper supply step (S100) of supplying the release paper 10 to the transfer conveyor (C);
The glass fiber chop 20 and the polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the release paper 10 to form a mixture layer of the glass fiber chop and polyurethane stock solution so that the glass fiber chop is distributed in the polyurethane stock solution. Layer formation step (S200); and
A release paper supply step (S500') of supplying and stacking a release paper 70 on the upper surface of the mixture layer;
The mixture layer is foamed while moving along the moving direction of the conveyor (C) to form a foam layer (F) having a density of 50 to 150 kg / m ³ Composite for cargo holds of LNG carriers using glass fiber chops Manufacturing method of cold insulation material.
A release paper supply step (S100) of supplying the release paper 10 to the transfer conveyor (C);
The primary glass fiber chops 20 and the primary polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the release paper 10 so that the glass fiber chops are distributed in the polyurethane stock solution. A first mixture layer forming step of forming a mixture layer of the stock solution (S200);
A non-woven fabric layer forming step (S300) of supplying and laminating a non-woven fabric 40 on the upper surface of the first mixture layer;
The secondary glass fiber chops 20 and the secondary polyurethane stock solution 30 are simultaneously sprayed on the upper surface of the nonwoven fabric layer to distribute the glass fiber chops in the polyurethane stock solution. a second mixture layer forming step of forming a mixture layer (S400); and
A release paper supply step (S500) of supplying and stacking a release paper 70 on the upper surface of the secondary mixture layer; including,
The first mixture layer and the second mixture layer are foamed while moving along the moving direction of the conveyor (C), and the primary foam layer (F1), which is a low-density foam layer having a density of 50 to 120 kg/m 3 and a density of 80 to 120 kg/m ³ , is formed. 180 kg / m ³ High-density foam layer, the secondary foam layer (F2) is formed, respectively, characterized in that the manufacturing method of the composite cold insulator for the cargo hold of the LNG carrier using glass fiber chop.
delete delete delete delete A composite cold insulator of a single-layer structure for a cargo hold of an LNG carrier using glass fiber chops manufactured by the method of claim 1,
A foam layer (F) obtained by foaming a mixture layer of glass fiber chop 20 and polyurethane stock solution 30 into a foam layer having a density of 50 to 150 kg/m ³ ;
A composite cold insulator for a cargo hold of an LNG carrier using glass fiber chop, characterized in that it is a foam layer of a single-layer structure consisting of.
A composite cold insulator for a cargo hold of an LNG carrier using glass fiber chops manufactured by the method of claim 2,
A primary foam layer (F1) obtained by foaming a primary mixture layer obtained by mixing primary glass fiber chops 20 and primary polyurethane stock solution 30 into a low-density foam layer having a density of 50 to 120 kg/m ³ ;
a non-woven fabric layer in which non-woven fabric 40 is laminated on the upper surface of the primary foam layer (F1) to be bonded to the secondary foam layer (F2); and
A secondary mixture layer obtained by mixing the secondary glass fiber chops 50 and the primary polyurethane stock solution 60 on the upper surface of the nonwoven fabric 40 is a high-density foam layer having a density of 80 to 180 kg/m ³ a foamed secondary foam layer (F2);
A composite cold insulator for a cargo hold of an LNG carrier using glass fiber chop, characterized in that it is a foam layer of a multi-layer structure consisting of.

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