KR20210022950A - Insulation board - Google Patents

Abstract

The present invention relates to an insulating plate and, more particularly, to an insulating plate which exhibits excellent heat resistance and mechanical strength even at high process temperatures and has excellent thermal insulation properties. According to the present invention, the insulating plate comprises: a support member which comprises an upper plate part and a lower plate part which are arranged opposite to each other, and a vertical support part disposed between the upper plate part and the lower plate part, and contains polyphenylene sulfide and a reinforcing agent; a cavity formed between the upper plate part and the lower plate part and occupying 60% or more of an apparent volume of the support member; and a cover member disposed to seal the support member.

Description

Insulation board {Insulation board}

The present invention relates to a heat insulating plate, and more particularly, to a heat insulating plate that exhibits excellent heat resistance and mechanical strength even at a high process temperature, and has excellent heat insulation properties.

As minimizing environmental costs has become an important issue for companies and countries, energy-efficient design for all buildings is indispensable. Currently, in the construction of buildings, requirements for energy conservation such as eco-friendly building certification and energy efficiency grade certification are being strengthened.

When cooling and heating is performed inside a building, a large part of the energy loss is through the exterior part of the building. Therefore, the method of insulating the exterior of a building has been heavily dealt with in relation to energy saving. For example, when insulating the exterior of a building, it is possible to save more than 50% of the energy loss of the building.

Conventionally, polyurethane, styrofoam, and the like have been used as general materials used as insulation of buildings. This foam-type insulation material is the principle that the insulation effect is realized by the air in the pores that form the foam.In recent years, a vacuum insulation panel (VIP) has been developed that further lowers the heat conduction characteristics through a vacuum space caused by reduced pressure. .

However, the vacuum insulation panel is implemented by forming a vacuum space between a pair of panels, but the vacuum part with insulation performance disappears as the panel is compressed and depressed inside by external atmospheric pressure, and damage to the panel or deterioration of insulation performance. There is a problem that is caused.

Accordingly, it is urgent to develop an insulation material that minimizes panel damage and deterioration of insulation performance due to compression due to external atmospheric pressure while expressing excellent insulation performance by increasing the volume of empty space inside the insulation material.

Registered Patent Publication No. 10-0237975

The present invention has been devised in consideration of the above points, and provides an insulation plate with minimized panel damage and deterioration of insulation performance due to compression by external atmospheric pressure while maximizing insulation performance by increasing the volume of empty space inside the insulation. Has a purpose.

In addition, another object of the present invention is to provide a thermal insulation plate capable of withstanding thermal properties and mechanical strength sufficiently capable of withstanding a high process temperature necessary for realizing a vacuum state within a short process time when the empty space is implemented in a vacuum state.

In order to solve the above problems, the present invention includes a support member including an upper plate portion and a lower plate portion disposed opposite to each other, and a vertical support portion disposed between the upper plate portion and the lower plate portion, and including polyphenylene sulfide and a reinforcing agent; A cavity formed between the upper plate portion and the lower plate portion and occupying a volume of at least 60% of the apparent volume of the support member; And a cover member disposed to seal the support member.

According to an embodiment of the present invention, the cavity may be in a vacuum state.

In addition, the vertical support may be integrally formed on the main surfaces of the upper and lower plates, or may be integrally formed on the main surface of any one of the upper and lower plates.

In addition, the vertical support portion may be integrally formed on a main surface of the upper plate portion or the lower plate portion, and a receiving portion for accommodating a part of the vertical support portion may be provided on a main surface of the lower plate portion or the upper plate portion facing the main surface.

In addition, a receiving portion for accommodating an upper end and a lower end of the vertical support portion may be provided on the main surfaces of the upper plate portion and the lower plate portion facing each other.

In addition, the reinforcing agent may be included in an amount of 33 to 150 parts by weight based on 100 parts by weight of polyphenylene sulfide.

In addition, the cavity occupies 80 to 95% of the apparent volume of the support member, and the reinforcing agent may be included in an amount of 43 to 100 parts by weight based on 100 parts by weight of polyphenylene sulfide.

In addition, the cover member may include a metal layer.

In addition, when the support member is heated at 320° C. for 2 hours, the weight loss ratio may be 1% or less.

In addition, the support member may have a strength of 125 MPa or more, more preferably 140 MPa or more, based on a specimen manufactured according to ISO 294-1.

In addition, the upper plate portion and the lower plate portion may have a thickness of 0.5 to 2 mm, respectively.

In addition, the polyphenylene sulfide may have a weight average molecular weight of 20,000 to 60,000.

In addition, the reinforcing agent may include glass fibers having a number average fiber length of 0.05 mm to 0.9 mm and a diameter of 5 to 20 μm.

In addition, the present invention provides a structure comprising the heat insulating plate according to the present invention.

According to the present invention, while maximizing the insulation performance through the internal empty space, even if the internal empty space is depressurized and maintained in a vacuum state, it prevents damage such as depression and cracks of the insulation material due to external pressure, thereby expressing very excellent insulation performance for a long time. can do. In addition, when the empty space is implemented in a vacuum state, thermal properties and mechanical strength that can sufficiently withstand the high process temperature required are ensured, so that it is possible to implement an insulation plate having further improved insulation performance.

1 is a schematic cross-sectional view of a heat insulating plate according to an embodiment of the present invention.
2 is an exploded perspective view of the heat insulating plate according to FIG. 1.
3 to 5 are exploded perspective views of support members of various embodiments included in an embodiment of the present invention.
6 is a cross-sectional view of a cover member according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and the same reference numerals are added to the same or similar components throughout the specification.

Referring to FIG. 1, a heat insulating plate 100 according to an embodiment of the present invention includes a support member 10 and a cover member 20 disposed to seal the support member 10.

The support member 10 includes an upper plate portion 11 and a lower plate portion 12 disposed opposite to each other, and a vertical support portion 13 disposed between the upper plate portion 11 and the lower plate portion 12.

The upper plate portion 11 and the lower plate portion 12 may have a plate shape having a predetermined area. The upper plate 11 and the lower plate 12 may have a thickness of 0.5 to 2 mm. If the thickness is less than 0.5 mm, the cavity formed between the upper plate 11 and the lower plate 12 is depressurized or after depressurization. When it is in a vacuum state, it is difficult to withstand the external force caused by the external atmospheric pressure, so there is a risk of warping, depression, and cracking. In addition, when the thickness exceeds 2mm, the weight increases, and molding may be difficult.

In addition, the vertical support portion 13 is a cavity occupying a predetermined volume between the upper plate portion 11 and the lower plate portion 12 by spaced apart between the upper plate portion 11 and the lower plate portion 12, which are disposed opposite to each other. It is responsible for the function of forming and maintaining. The vertical support part 13 may have a rib shape as shown in FIGS. 2 and 3, a lattice shape or a honeycomb shape as shown in FIG. 4, or a pile shape as shown in FIG. 5. However, the present invention is not limited thereto, and a shape in which the upper plate part 11 and the lower plate part 12 are spaced apart to create and maintain a cavity therein may be employed without limitation.

Meanwhile, the vertical support part 13 may be fastened to the upper plate part 11 and/or the lower plate part 12 by a force-fitting method, or may be fixed through a separate fastening member, for example, an adhesive. Alternatively, it may be fixed through a cover member that seals the outside of the support member after being interposed between the upper plate part 11 and the lower plate part 12 without a separate fastening member.

2 to 5, FIGS. 2, 3, and 5 are examples in which the upper plate 11 and the lower plate 12 and the vertical support 13 are fastened in a force-fitting manner. In this case, in the embodiment of FIGS. 1 and 5, the vertical support portions 13 and 18 are formed integrally with the upper plate portions 11 and 16, and a portion of the lower end of the vertical support portions 13 and 18 on the lower plate portions 12 and 17 The vertical support (13,18) is forcibly fitted to the receiving portion (H,H ₃ ) through the receiving portion (H,H ₃ ) to accommodate the upper plate portion (11,16), the lower plate portion (12,17) And the vertical support portions 13 and 18 may be combined into one support member 10 and 15.

Alternatively, as shown in Fig. 3, the support member 10' is a receiving portion (H) accommodating the upper and lower ends of the vertical support portion 13' on the main surfaces of the opposing upper plate portion 11' and the lower plate portion 12'. ₁ , H ₂ ) may be provided so that the vertical support part 13 ′ is forcibly fitted _{to the receiving part H 1} , H _2.

Alternatively, as shown in FIG. 4, the support member 10" has a grid-shaped vertical support part 13" disposed between the opposite upper plate part 11" and the lower plate part 12", and separates such as an adhesive. It may be implemented by further interposing a fastening member (not shown).

Meanwhile, the width, width, and height of the vertical support portions 13, 13', 13", 18 may be appropriately adjusted in consideration of the volume of the cavity to be described later, and the present invention is not particularly limited thereto. The height of the part (H,H ₁ ,H ₂ ,H ₃ ) is also not particularly limited in the present invention, and the vertical support portions 13, 13', 18 are forcibly fitted and fixed, and the volume of the cavity to be described later can be realized. When formed, there is no difficulty.

Meanwhile, unlike FIGS. 2 to 5, the vertical support portion may be integrally formed on the main surface of the upper plate and the lower plate. In this case, there is an advantage of simplifying the process as it is not necessary to assemble the upper plate part, the lower plate part, and the vertical support part by providing a separate receiving part or a separate fastening member in the upper plate part or the lower plate part.

The support members 10, 10', 10", 15 may be used without limitation in the case of a material used for a general heat insulator. However, the high heat applied in the process of manufacturing in a vacuum state by depressurizing a cavity to be described later In consideration, the support members 10, 10', 10", 15 contain polyphenylene sulfide as a matrix component, and have a reinforcing agent dispersed in the matrix to ensure sufficient mechanical strength.

Polyphenylene sulfide may be used without limitation in the case of known types, but preferably those having a weight average molecular weight of 20,000 to 60,000 may be used. If the weight average molecular weight is less than 20,000, there is a problem of lowering the strength of the product, and if it exceeds 60,000, there is a problem that the resin viscosity is high in a processing process such as injection molding, so that molding cannot be performed. In addition, the use of a melt viscosity of 100 to 400 Pas in length (L)/width (D) = 40/1, shear rate 600/sec, and temperature 320°C measurement conditions is in terms of expressing toughness, especially low-temperature toughness. It can be very beneficial.

In addition, the reinforcing agent may be adopted without limitation in the case of a shape or material that improves the mechanical strength of the polymer matrix. However, preferably, the reinforcing agent may include glass fibers in terms of compatibility with polyphenylene sulfide, thermal properties that can withstand high temperature processing conditions, and prevention of gas generation due to impurities.

As an example, the glass fiber may be included in an amount of 33 to 150 parts by weight based on 100 parts by weight of polyphenylene sulfide. If the glass fiber is contained in less than 33 parts by weight, the mechanical strength is significantly weakened. In particular, damage such as cracks, warping, and depression of the upper or lower plate may occur in the process of vacuuming the cavity through the decompression process, or due to external atmospheric pressure. It may be squeezed by the pressure applied thereto, and there is a concern that a remarkable decrease in thermal insulation performance and a decrease in appearance quality may be caused. In addition, since the mechanical strength is weak, the volume of the cavity to be described later cannot be largely realized, and thus, it may be difficult to implement a heat insulating plate that exhibits excellent heat insulating performance. In addition, if the amount of glass fiber exceeds 150 parts by weight, the dispersibility in the polyphenylene sulfide matrix may be significantly lowered, resulting in uneven mechanical strength, resulting in significant damage to a specific part of the support member compared to other parts. There is great concern. In addition, the mechanical strength may be rather lowered.

On the other hand, more preferably, the glass fiber may be included in an amount of 43 to 100 parts by weight based on 100 parts by weight of polyphenylene sulfide, through which the support member having a significantly large cavity reaching 80 to 95% of the apparent volume of the support member It is easy to implement the furnace, and through this, it is possible to implement a heat insulating plate that expresses more improved heat insulation performance. If less than 43 parts by weight of glass fiber is included, it may be difficult to implement a support member having a volume of 80% or more of the apparent volume of the support member. , There is a risk of damage/damage such as dents. In addition, when the glass fiber is included in an amount exceeding 100 parts by weight, it may be difficult to implement a support member including a cavity that reaches 95% of the apparent volume of the support member.

On the other hand, the glass fiber may have a diameter and a conventional fiber length used as a reinforcing agent. However, preferably, the number-average fiber length may be 0.05mm to 0.9mm, and the diameter may be 5 to 20㎛, through which an internal cavity of 60%, preferably 80 to 95% of the apparent volume of the support member is formed, It may be advantageous to develop sufficient mechanical strength to maintain it even with an applied external force, and if any one or more of the number average fiber length or diameter is not satisfied, it may be difficult to achieve all of the desired effects.

The reinforcing agent may further include a known reinforcing agent type other than the above-described glass fiber, and the detailed description thereof will be omitted in the present invention.

The support members 10, 10', 10", 15 may further include other additives in addition to the polyphenylene sulfide and a reinforcing agent described above.

The other additives may be a dispersant, a defoaming agent, a colorant, a flame retardant, a release agent, a heat stabilizer, and the like, and the detailed description thereof will be omitted in the present invention.

Meanwhile, the support members 10, 10', 10", 15 may have a heating loss ratio of 1% or less, more preferably 0.6% or less when heated at 320° C. for 2 hours. As a percentage of the weight that is reduced by the high heat applied in the process of decompressing in a vacuum state, the high heating loss ratio means that certain components contained in the support member come out in a gas-like state due to high heat, in this case In addition to weakening the mechanical strength of the support member, it may be difficult to perform the decompression process smoothly due to the generated gas In particular, the continuous outflow of gas after the decompression process is completed is insulated as part of the cavity is changed to a non-vacuum state. It may cause a decrease in performance.

On the other hand, the components that affect the heating loss ratio are unreacted in the polymerization process of polyphenylene sulfide corresponding to the matrix component or low molecular weight monomers or oligomers that do not have an appropriate degree of polymerization, various catalysts or additives used in the polymerization process, and It may be the other additives described above.

On the other hand, the above-described upper plate portion, lower plate portion, and vertical support portion may be formed through a known method, for example, may be manufactured through a known molding method such as injection molding, extrusion molding, compression molding, and the present invention. It does not specifically limit.

The above-described support members 10,10',10",15 have a cavity due to the spaced space between the upper plate portions 11,11',11",16 and the lower plate portions 12,12',12",17. Including, and the volume of the cavity may be 60% or more, preferably 80% or more, more preferably 80 to 95% of the apparent volume of the support member, through which excellent thermal insulation performance can be expressed. The cavity may be in a vacuum state through which it is possible to achieve remarkably improved thermal insulation performance compared to a state filled with air, and the vacuum state may be performed through a decompression process in a state where high heat is applied, in which case high heat is applied within the cavity. There is an advantage in shortening the process time by allowing the contained gaseous low molecular weight material to escape more quickly.

In addition, the support member (10, 10', 10", 15) despite including a cavity occupying a volume of 60% or more, preferably 80% or more, more preferably 80 to 95% of the apparent volume of the support member The strength measured according to ISO 527-1,2 based on a specimen manufactured according to ISO 294-1 may be 125 MPa or more, more preferably 140 MPa or more, and even more preferably 160 MPa or more.

Next, the cover member 20 arranged to seal the above-described support members 10, 10', 10", 15 will be described.

The above-described cover member 20 is a member that blocks the movement of gas between the cavity 14 inside the support member 10, 10', 10", 15 and the outside air, and occurs when the cavity 14 is in a vacuum state. The cover member 20 may be used without limitation in the case of a known member having a gas barrier property, and as an example, the cover member 20 may be used without limitation. ) May include a metal layer 21 having gas barrier properties as shown in FIG. 6, an outer skin layer 23 disposed on one side of the metal layer 21, and an inner skin layer 22 disposed on the other side of the metal layer 21. have.

The metal layer 21 may be used without limitation in the case of a known metal layer having gas barrier properties, and examples thereof include aluminum, copper, phosphorbronze (PB), aluminum bronze, white copper, beryllium-copper (Berylium- copper), chromium-copper, titanium-copper, iron-copper, Corson alloy, and chromium-zirconium copper alloy.

In addition, the inner skin layer 22 is a layer in contact with the support members 10, 10', 10", and 15, and may be an adhesive layer for bonding to the support members 10, 10', 10", and 15. For example, the inner skin layer 22 is PPa (acid modified polypropylene), CPP (casting polyprolypene), LLDPE (Linear Low Density Polyethylene), LDPE (Low Density Polyethylene), HDPE (High Density Polyethylene), polyethylene terephthalate, polypropylene. , Ethylene vinyl acetate (EVA), an epoxy resin and a phenol resin may be formed as a single layer selected from one or two or more laminated. In addition, the adhesive layer may be bonded to the support member through fusion through heat, for example.

In addition, the outer skin layer 23 is a protective layer protecting the above-described metal layer 21, and may be a layer formed of a fluorine-based compound such as nylon, PET, PTFE, Teflon, or PVDF, but is not limited thereto.

The thickness of each of the metal layer 21, the inner skin layer 22, and the outer skin layer 23 described above may be appropriately changed according to the purpose, such as gas barrier properties and prevention of damage due to external force, so the present invention is not particularly limited thereto.

The present invention will be described in more detail through the following examples, but the following examples do not limit the scope of the present invention, which should be construed to aid understanding of the present invention.

<Example 1>

After mixing 65 parts by weight of a reinforcing agent glass fiber (fiber length 3 mm, diameter 13 μm) with respect to 100 parts by weight of polyethylene sulfide having a weight average molecular weight of 40,000, the upper and lower panels are molded as shown in FIG. The vertical support portions of the negative and lattice shape (100 grids) were manufactured, and the vertical support portions were placed between the upper plate portion and the lower plate portion, and then each of them was fixed with one support member with a cover member to be described later. At this time, the upper plate portion and the lower plate portion were manufactured to have a thickness of 1 mm, and the implemented support member had an internal cavity volume of 93% based on the total apparent volume. In addition, as a result of measuring the heating loss ratio for 2 hours at 320°C for the support member, it was 0.23%. At this time, the number average fiber length of the glass fibers provided in the support member finally implemented after the compound and injection molding was 0.2 mm and the diameter was 13 μm.

Thereafter, a cover member including an aluminum layer as a metal layer, a PPa layer as an inner skin layer, and a PET film as an outer skin layer was sealed through heat, excluding only a portion of the outside of the support member. Thereafter, a decompression process was performed through the unsealed part, and then the cavity was made into a vacuum state, and then the part of the cover member was sealed again through heat to manufacture a heat insulating plate as shown in Table 1 below.

<Examples 2 to 10>

It was prepared in the same manner as in Example 1, but by changing the volume of the cavity or changing the content of glass fibers as shown in Table 1 below, a heat insulating plate as shown in Table 1 was prepared.

<Comparative Examples 1 to 2>

It was prepared in the same manner as in Example 1, but without using a reinforcing agent glass fiber, and by varying the volume of the cavity, a heat insulating plate as shown in Table 1 was prepared.

<Experimental Example>

It is shown in Table 1 by evaluating the following physical properties for the heat insulating plate according to the Examples and Comparative Examples.

1. Inner depression

By observing the upper and lower surfaces of the manufactured insulating plate, the number of depressed parts was counted compared to the total number of grids corresponding to the grid-shaped vertical support part.

2. Mechanical strength

Tensile strength was measured according to ISO 527-1,2 based on specimens manufactured according to ISO 294-1.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Comparative Example 1 Comparative Example 2 Joint volume (%) 93 98 80 62 62 85 85 85 85 85 62 50 Glass fiber (parts by weight) 65 100 65 25 33 33 43 100 150 160 0 0 Inner depression (number) 0 54 0 69 8 25 0 5 30 76 91 55 Tensile strength (MPa) 180 160 180 108 140 140 170 160 125 95 80 80

As can be seen in Table 1,

It can be seen that in Comparative Examples 1 and 2, which did not contain the reinforcing agent glass fiber, the inner depression was significantly larger than that of Example 1, although the volume of the cavity was significantly smaller than that of Example 1.

In addition, even though the support member having the same mechanical strength through Comparative Examples 1 and 2 was used, the number of inner depressions increased by 1.5 times or more even though the volume of the cavity increased by 12% from 50% to 62%. It can be seen that a significant difference occurs in the inner depression.

On the other hand, in the case of Example 2, it can be seen that even when the cavity volume is so large that the reinforcing agent is included in an appropriate amount, a lot of internal depressions occurred.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same idea. It will be possible to easily propose other embodiments by changing, deleting, adding, etc., but it will be said that this is also within the scope of the present invention.

10,10',10",15: support member 11,11',11",16: upper plate
12,12',12",17: lower plate 13,13',13",18: vertical support
20: cover member 100: heat insulation plate

Claims (14)

A support member including an upper plate portion and a lower plate portion disposed opposite to each other, and a vertical support portion disposed between the upper plate portion and the lower plate portion, and including polyphenylene sulfide and a reinforcing agent;
A cavity formed between the upper plate portion and the lower plate portion and occupying a volume of at least 60% of the apparent volume of the support member; And
Insulation plate comprising a; cover member disposed to seal the support member. The method of claim 1,
The heat insulating plate, characterized in that the cavity is in a vacuum state. The method of claim 1,
The vertical support portion is integrally formed on the main surface of the upper plate portion and the lower plate portion, or integrally formed on any one of the upper plate portion and the lower plate portion. The method of claim 3,
The vertical support portion is formed on the main surface of the upper plate portion or the lower plate portion, and a receiving portion for receiving a portion of the vertical support portion is provided on a main surface of the lower plate portion or the upper plate portion facing the main surface. The method of claim 1,
Heat insulating plate, characterized in that it comprises a receiving portion for accommodating the upper end and the lower end of the vertical support portion on the main surfaces of the upper plate portion and the lower plate portion facing each other. The method of claim 1,
The reinforcing agent is a heat insulating plate, characterized in that contained in an amount of 33 to 150 parts by weight based on 100 parts by weight of polyphenylene sulfide. The method of claim 1,
The cavity occupies 80 to 95% of the apparent volume of the support member,
The reinforcing agent is a heat insulating plate, characterized in that contained in 43 to 100 parts by weight based on 100 parts by weight of polyphenylene sulfide. The method of claim 1,
The cover member is a heat insulating plate, characterized in that it comprises a metal layer. The method of claim 1,
When the support member is heated at 320° C. for 2 hours, the weight loss ratio is 1% or less. The method of claim 1,
The support member is a heat insulating plate, characterized in that the strength is 125 MPa or more. The method of claim 1,
The heat insulating plate, characterized in that the thickness of each of the upper plate and the lower plate 0.5 ~ 2㎜. The method of claim 1,
The polyphenylene sulfide is a heat insulating plate, characterized in that the weight average molecular weight is 20,000 ~ 60,000. The method of claim 1,
The reinforcing agent is a heat insulating plate, characterized in that the number-average fiber length of 0.05mm ~ 0.9mm, characterized in that it comprises a glass fiber having a diameter of 5 ~ 20㎛. Structure comprising a; insulation plate according to any one of claims 1 to 13.

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