KR20210153587A - Skin material of insulating material for building - Google Patents

Abstract

Provided is a face material of a constructional heat insulting material comprising a metal layer, a glass scrim layer, and a poly olefin-based complex non-woven fabric layer. According to the present invention, the excellent adhesion intensity of the face material with respect to a foamed body and wet mortar can be ensured.

Description

Face material for building insulation {SKIN MATERIAL OF INSULATING MATERIAL FOR BUILDING}

The present invention relates to a face material of a building insulation material.

By attaching an insulating material to the wall of a building to prevent heat transfer, the effect of external temperature changes on the internal temperature of the building can be reduced, and a constant indoor temperature can be maintained with less energy. Among these insulating materials for construction, in the external insulation used by attaching to a wall made of concrete or mortar, structural stability such as a gap is widened because the face of the insulating material and the wall made of concrete or mortar do not adhere well. There is a problem.

Accordingly, in order to properly adhere to a wall made of concrete or mortar, glass fiber is used as a face material. However, glass fiber is harmful to the human body and scatters during handling, giving a rough touch to the skin, and there is a problem that there is a risk of getting into the eyes, which gives inconvenience to the operator.

It is an object of the present invention to provide a face material for a building insulation material that imparts excellent adhesion strength, and provides excellent dimensional stability, air permeability and flame retardancy.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

It is possible to provide a face material for a building insulating material comprising a metal layer, a glass scrim layer, and a polyolefin-based composite nonwoven fabric layer according to the present invention.

The face material of the insulating material for construction according to the present invention can impart excellent adhesion strength to foam and wet mortar, and provide excellent dimensional stability, breathability and flame retardancy.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a schematic cross-sectional view of a face material of a building insulating material according to an embodiment of the present invention.
2 is a schematic cross-sectional view of an insulating material including a face material of a building insulating material according to another embodiment of the present invention.
3 is a schematic cross-sectional view of a heat insulating material including a face material of a building heat insulating material according to another embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

In the following, that an arbitrary component is disposed on the "upper (or lower)" of a component or "upper (or below)" of a component means that any component is disposed in contact with the upper surface (or lower surface) of the component. Furthermore, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Hereinafter, it will be described according to some embodiments of the present invention.

One embodiment of the present invention provides a face material for a building insulation comprising a metal layer, a glass scrim layer, and a polyolefin-based composite nonwoven fabric layer. 1 is a schematic cross-sectional view of a face material of the heat insulating material for construction according to an embodiment of the present invention. As shown in FIG. 1 , in the face material 100 of the building insulation material, a glass scrim layer 120 is laminated on the other side of the polyolefin-based composite nonwoven fabric layer 110 , and a metal layer on the other side of the glass scrim layer 120 . It may have a structure in which 130 is stacked.

In general, the face material of the building insulation material may serve as a carrier in passing the foamable composition through the caterpillar. On the other hand, in the insulation used by attaching to the mortar material wall, the face material and the mortar material do not adhere well, so the gap is widened. there is a problem.

Accordingly, glass fiber can be used as a cotton material so that it can be properly attached to the mortar wall, but glass fiber is harmful to the human body, scatters during handling, is inhaled into the respiratory tract, gives a rough touch to the skin, and is There is a problem that there is a risk of entering, which causes inconvenience to workers.

The face material of the building insulation material includes a metal layer, a glass scrim layer, and a polyolefin-based composite nonwoven fabric layer, and while preventing risks and inconvenience to workers, at the same time providing excellent adhesion strength to foam and mortar walls, and realizing flame retardancy At the same time, it is possible to improve resistance to moisture, strength reinforcement, breathability and dimensional stability. In addition, it acts as a barrier layer against the foaming gas of the thermosetting foam, and long-term thermal insulation properties can be implemented at a high level.

The face material of the insulating material for construction may have a thickness of about 0.1 mm to about 0.9 mm. If the thickness is less than the above range, the thickness is thin and may be torn during handling, and there may be problems such as quality defects in the process. Due to this, there may be problems with the winding quality and adhesion with the thermosetting foam.

Specifically, the face material of the building insulation material may include a polyolefin-based composite nonwoven fabric layer to provide excellent air permeability along with excellent adhesion strength, dimensional stability and flame retardancy. The polyolefin-based composite nonwoven fabric layer is manufactured by a papermaking method, and may have a uniform structure. Papermaking method refers to obtaining a nonwoven fabric by mixing the raw materials constituting the nonwoven fabric with water, scooping out a certain basis weight through a mesh network, and dehydrating the water with pressure or heat.

The polyolefin-based composite nonwoven fabric layer may include polyolefin h (chop), pulp, and a binder.

Specifically, the polyolefin ?h (chop) may have a length of about 10 mm to about 25 mm. The polyolefin ?h (chop) may have a ?h shape having the length, for example, formed by spinning and cutting polyolefin. The polyolefin ?h (chop) has a length within the above range, thereby efficiently exhibiting an anchoring effect, imparting excellent adhesion strength, mechanical strength and dimensional stability, and at the same time exhibiting excellent air permeability.

Specifically, when the length of the polyolefin h(chop) is less than the above range, the polyolefin h(chop) or pulp contained in the polyolefin-based composite nonwoven fabric layer is agglomerated, and the dispersibility is lowered to form a uniform nonwoven fabric layer Can not. In addition, tensile strength, adhesion strength, and dimensional stability may be deteriorated. And, when the length of the polyolefin ?h (chop) exceeds the above range, it is difficult to have a uniform orientation between the pulps included in the polyolefin-based composite nonwoven fabric layer, and it is difficult to obtain the desired physical properties compared to the content. There may be a problem. In addition, the surface area of the nonwoven fabric layer decreases and the adhesion strength between the interfaces decreases, and the foamable composition is impregnated in the face material in the process of foaming the foamable composition to form a foam, and the impregnated part in the cured product becomes weak and the adhesion strength of the face material decreases This causes problems such as contamination in the foam manufacturing process.

And, the polyolefin h (chop) has a diameter of about 8 μm to about 25 μm, imparts adhesion strength of a certain level or more to the polyolefin-based composite nonwoven fabric layer and excellent breathability, and provides excellent long-term excellent ventilation for construction materials including the same. Insulation performance can be provided. The diameter is defined as the average value of the diameters of the cross-sections cut so that the polyolefin ?h is perpendicular to the longitudinal direction.

Specifically, when the diameter of the polyolefin h(chop) is less than the above range, the polyolefin h(chop) or pulp contained in the polyolefin-based composite nonwoven fabric layer is agglomerated, and the dispersibility is lowered to form a uniform nonwoven fabric layer Can not. In addition, tensile strength and dimensional stability may be deteriorated. And, when the diameter of the polyolefin h(chop) exceeds the above range, the number of polyolefin h(chop) included in the polyolefin-based composite nonwoven fabric layer is reduced, and the interval between polyolefin h(chop) is not appropriate. As a result, air permeability may deteriorate.

The polyolefin ?h (chop) may include one selected from the group consisting of polyethylene, polypropylene, and combinations thereof. The polyolefin-based composite nonwoven fabric layer can provide excellent air permeability, along with excellent adhesion strength, dimensional stability and flame retardancy, including polyolefin ?h (chop) of the material. In addition, skin irritation or dustability can be reduced.

The polyolefin-based composite nonwoven fabric layer may include about 20 wt% to about 80 wt%, specifically, about 30 wt% to about 50 wt% of the polyolefin h (chop). The polyolefin ?h (chop), compared to glass fiber, can provide excellent breathability even with a low content. The polyolefin-based composite nonwoven fabric layer may exhibit excellent air permeability including the polyolefin h (chop) in the above range. And, it is possible to impart excellent heat insulating properties to the heat insulating material including the same.

The polyolefin-based composite nonwoven fabric layer can protect the foam from physical impact, including the pulp, and prevent the foamable composition from being impregnated in the face material in the process of manufacturing the heat insulating material, thereby improving adhesion strength, and providing excellent breathability. have.

The pulp may exist in a curved line or a straight line between the materials included in the polyolefin-based composite nonwoven fabric layer. In addition, the pulp can more economically reinforce the action of the polyolefin h (chop) and assist the action of the binder. In addition, the pulp may lower the air permeability by making the structure of the polyolefin-based composite nonwoven fabric layer more dense. Accordingly, the polyolefin-based composite nonwoven fabric layer, including the pulp, can maintain excellent air permeability at a small basis weight.

The polyolefin-based composite nonwoven fabric layer may include about 25 parts by weight to about 170 parts by weight of the pulp based on 100 parts by weight of the polyolefin ?h (chop). Specifically, the pulp may include about 40 parts by weight to about 150 parts by weight or 50 parts by weight to 100 parts by weight.

The polyolefin-based composite non-woven fabric layer contains the pulp in an amount within the above range, thereby more economically binding the materials in the polyolefin-based composite non-woven fabric layer, and exhibiting excellent tensile strength, breathability, adhesion strength and dimensional stability at the same time. .

The polyolefin-based composite nonwoven fabric layer may include a binder including one selected from the group consisting of (meth)acrylic resins, polyurethane-based resins, vinyl-based resins, styrene-based resins, and combinations thereof. Specifically, the binder may include a binder including one selected from the group consisting of acrylic styrene, polyvinyl chloride (PVC), polyvinyl alcohol (PVA), and combinations thereof. The binder may increase the bonding strength of the polyolefin h and pulp contained in the polyolefin-based composite nonwoven fabric layer in the form of a solution, and provide improved adhesion strength and breathability.

The polyolefin-based composite nonwoven fabric layer may include the binder in an amount of about 10 parts by weight to about 50 parts by weight, based on 100 parts by weight of the polyolefin ?h (chop). Specifically, the binder may be included in an amount of about 15 parts by weight to about 40 parts by weight.

The polyolefin-based composite nonwoven fabric layer may have a thickness of about 0.1 mm to about 0.4 mm. If the thickness is less than the above range, the thickness is thin and may be torn during handling, and there may be problems such as quality defects in the process. Due to this, there may be problems with the winding quality and adhesion with the thermosetting foam.

Conventionally, in the face material of a building insulation material, dimensional stability and adhesion strength are given by including a high content of glass fiber in the nonwoven fabric layer. On the other hand, the polyolefin-based composite nonwoven fabric layer may not contain expensive glass fibers that are harmful to the human body and scatter during handling, causing inconvenience to workers. The face material of the building insulation material may include a metal layer, a glass scrim layer, and a polyolefin-based composite nonwoven fabric layer to exhibit appropriate density and air permeability, and to provide excellent dimensional stability.

Even if the polyolefin-based composite nonwoven fabric layer does not contain glass fibers, it contains the polyolefin h (chop), the pulp and the binder, and exhibits appropriate density and air permeability, and can provide excellent dimensional stability.

The polyolefin-based composite nonwoven fabric layer may have a basis weight of about 30 g/m 2 to about 50 g/m 2 . The polyolefin-based composite nonwoven fabric layer has a basis weight in the above range, thereby providing excellent adhesion strength and flame retardancy, and preventing contamination of caterpillars. In addition, the polyolefin-based composite nonwoven fabric layer constitutes a face material together with the metal layer and the glass scrim layer, and by having a basis weight within the above range, it is possible to prevent a step difference with the glass scrim layer.

Specifically, when the basis weight of the polyolefin-based composite nonwoven fabric layer is less than the above range, it may not be possible to smoothly compensate for the height difference in the width or length direction of the glass scrim layer, and since the overall content of the organic binder and the nonwoven fabric layer is small, the foam Adhesive strength may be lowered. And, when the basis weight exceeds the above range, as the organic binder content in the nonwoven layer increases, the flame retardancy may decrease and manufacturing cost may increase.

The face material of the building insulation material may include a glass scrim layer to provide dimensional stability, improve the compressive strength of the building insulation material including the same, and exhibit improved adhesion strength. The glass scrim layer may have a network structure in which neighboring glass fibers are separated by a wide interval of about 5 mm to about 10 mm. In addition, the glass scrim has a network structure in which about 3 to about 8 and glass fibers are arranged side by side in each of the horizontal and vertical directions within a predetermined size of 1 inch * 1 inch. It can provide dimensional stability of insulation materials for construction.

The glass scrim layer may have a thickness of about 0.1 mm to about 0.3 mm. If the thickness is less than the above range, the dimensional stability effect may be insignificant and there may be no protective effect against external impact, and if it exceeds the thickness, there may be a problem in that the manufacturing cost increases.

The face material of the building insulation includes a metal layer, by reflecting radiation in the infrared region, blocks outdoor solar radiation in summer, and preserves indoor heating radiation in winter to improve energy efficiency of buildings, and to exhibit flame retardancy can

The metal layer may have a thickness of about 5 μm to about 30 μm. If the thickness is less than the above range, the flame retardancy is lowered or the metal layer is easily scratched and thus flame retardant properties may not be expressed. There may be a problem.

The metal layer may include one selected from the group consisting of iron, stainless steel (SUS), aluminum, magnesium, copper, and combinations thereof. Specifically, the metal layer may include aluminum, and aluminum has a small specific gravity, high thermal and electrical conductivity, and strong corrosion resistance, so it can be easily processed into various shapes and provided with excellent flame retardancy.

The metal layer may be an aluminum thin film as a layer including an aluminum foil. In this way, by including an aluminum thin film, it is possible to realize flame retardancy, reinforce resistance to moisture and strength, and improve dimensional stability. And, it acts as a barrier layer for the foaming gas of the thermosetting foam, so that long-term thermal insulation properties can be realized at a high level.

The metal layer may be combined with the glass scrim layer to provide an excellent heat reflection effect, strength reinforcement, and excellent dimensional stability.

It may further include an acrylic coating layer on the surface of the metal layer. In general, an aluminum layer may have a problem of interfacial adhesion in a wet process with a mortar. For example, when the aluminum layer is adhered to the wet mortar, air pockets, that is, air bubbles may be generated by reacting with the aluminum layer and the wet mortar, and accordingly, a problem of deterioration of quality may occur. The face material of the insulating material for construction may protect the surface of the metal layer by treating the surface of the metal layer with an oxide film or by additionally stacking an acrylic coating layer on the surface of the metal layer.

The face material of the building insulation material may further include an adhesive layer. Specifically, the adhesive layer may be positioned between the metal layer and the glass scrim layer and/or between the glass scrim layer and the polyolefin-based composite nonwoven fabric layer to improve adhesion strength.

The adhesive layer may be formed by hot melt or heat welding. For example, a thermoplastic plastic film may be further positioned between the glass scrim layer and the polyolefin-based composite nonwoven fabric layer and then thermally welded.

The adhesive layer is easily heat-welded polyethylene (PE), polypropylene (PP), polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), ethylene-vinyl alcohol copolymer It may be formed of a thermoplastic plastic film including one selected from the group consisting of (EVOH) and combinations thereof. For example, the adhesive layer may be formed of a polyethylene film, and thus, exhibits excellent adhesion with the polyolefin-based composite nonwoven fabric layer, thereby providing excellent adhesion strength to the face material of the insulating material for construction including the same.

The adhesive layer may have a thickness of about 10 μm to about 30 μm. If the thickness is less than the above range, the adhesive performance is poor, for example, there may be a problem of interstitial peeling with the polyolefin-based composite nonwoven fabric layer. have.

2 is a schematic cross-sectional view of an insulating material including a face material of a building insulating material according to another embodiment of the present invention. As shown in FIG. 2 , the face material 100 of the building insulation material may be included in any one surface of the foam 10 to form the building insulation material 200 . Alternatively, as shown in FIG. 3 , it may be included on both sides of the foam 10 to form an insulating material for construction 200 ′.

The building insulation material including the face material of the building insulation material has excellent adhesion strength, so that the building wall and the building insulation material are firmly attached to prevent the occurrence of a gap between them. Insulation can be maintained. In addition, the building insulation material may exhibit excellent dimensional stability, air permeability and flame retardancy.

For example, as in FIG. 3 , the building insulation material is a (upper) face material/foam/polyolefin-based composite nonwoven fabric layer, a glass scrim layer and It may have a structure made of a (lower) planar material sequentially including a metal layer.

The face material of the building insulation material is sequentially laminated on the upper and lower surfaces of a caterpillar through which the foamable composition passes, and then the foamable composition is discharged between the face materials, foamed and cured, and the face material is laminated on the upper and lower portions of the foam. can achieve At this time, the building insulation material may have an adhesive force with the upper and lower face materials by the foaming pressure. And, the building insulation includes the face material of the building insulation including the metal layer, the glass scrim layer and the polyolefin-based composite nonwoven layer, and provides excellent adhesion strength to foams and wet mortars, and excellent dimensional stability, breathability and It may exhibit flame retardancy.

(Example)

Example 1:

Using a papermaking method, a polyolefin-based composite nonwoven layer comprising 45 wt% of polyolefin h (chop) having a length of 13 mm, 38 wt% of pulp, and 17 wt% of an acrylic binder, and having a basis weight of 35 g/m and a thickness of 0.2 mm was prepared. At this time, glass fibers were not included in the polyolefin-based composite nonwoven fabric layer.

In addition, from the outermost layer, an aluminum foil layer with a thickness of 25 μm, a glass scrim layer with a thickness of 0.3 mm having a network structure in which five glass fibers are arranged side by side in each of the horizontal and vertical directions within a predetermined size of 1 inch * 1 inch, and The polyolefin-based composite nonwoven fabric layer was thermocompression-bonded and laminated with a hydrophobic polyethylene film to prepare a face material. Then, the face material was placed on the upper and lower portions of the caterpillar mass production line, respectively, and foamed and cured while discharging the phenolic foamable composition between the face materials, to prepare a building insulation material with the face material attached to both sides of the foam.

Comparative Example 1:

Without the polyolefin h (chop) and the pulp, a glass nonwoven fabric layer having a thickness of 0.2 mm was prepared including 70% of glass fibers having a length of 20 mm and 30% of an acrylic binder.

In addition, from the outermost layer, an aluminum foil layer with a thickness of 25 μm, a glass scrim layer with a thickness of 0.3 mm having a network structure in which five glass fibers are arranged side by side in each of the horizontal and vertical directions within a predetermined size of 1 inch * 1 inch, and An insulating material for construction was prepared in the same manner as in Example 1, except that the nonwoven glass layer was thermocompression-bonded and laminated with a hydrophobic polyethylene film to prepare a face material.

Comparative Example 2:

A building insulating material was prepared in the same manner as in Example 1, except that the glass scrim layer was not included in the face material.

<Evaluation>

Experimental Example 1: Adhesive strength to mortar

The building insulation materials of the examples and comparative examples were prepared as samples of 200 mm (width, W) X 200 mm (length, L) X 70 mm (thickness, T). And, the adhesion strength of the mortar was measured for the sample using an adhesion strength tester, UTM (Instron, UTM), respectively.

Specifically, according to the KS F 4716 method, the mortar was placed on the surface of the building insulating material to a size of 40 mm (W) X 40 mm (L) X 2 mm (T) and cured for 2 weeks. For example, it was cured by putting mortar on the surface of the metal layer. After that, after bonding to the tensile jig with an epoxy adhesive, the adhesive strength was measured using the tester. And the result was described in Table 1.

Experimental Example 2: Adhesive strength between the face material and the foam

The building insulation materials of Examples and Comparative Examples were prepared as samples of 200 mm (W) X 200 mm (L) X 70 mm (T), and were measured using an adhesive strength tester, UTM (Instron, UTM). Specifically, the surface of the face material including the metal layer of the insulator was cut at intervals of 25 mm, the end was fixed to a tension jig, and peeled at 90 degrees at a tensile speed of 300 mm/min. And the result was described in Table 1.

Experimental Example 3: Dimensional stability

The building insulation materials of Examples and Comparative Examples were prepared as samples of 100 mm (W) X 100 mm (L) X product thickness (T), and the initial dimensions were precisely measured. And, according to KS M ISO 4898, after being left at 70° C. for 24 hours, the dimensional change rates of length (L) and width (W) were measured. And, the average value of each dimensional change rate of length (L) and width (W) is described in Table 1. It means that dimensional stability is so high that the said dimensional change rate is small.

Experimental Example 4: Flame Retardant

According to KS F ISO 5660-1, the total heat release was measured using a cone calorimeter (FESTEC, cone calorimeter) to evaluate the semi-incombustibility, and the smaller the heat release value, the higher the semi-incombustibility.

Specifically, the construction insulation materials of the examples and comparative examples were prepared as a sample of 100 mm (W) X 100 mm (L) X 50 mm (T) and the total heat release was measured when heated for 10 minutes with 50 kW/m2 radiant heat. And the result was described in Table 1.

Experimental Example 5: Breathability

The degree of air permeation was measured according to a constant pressure (20 Pa) and the degree of air flow per unit area using an air permeability measuring device (IDM Instruments, foam porosity tester), and the measured value was L/min.cm ² . And the result was described in Table 1. The higher the measured value, the higher the air permeability, which means that the tissue is not dense and the airflow is high.

Adhesive strength to mortar (kPa) and fracture shape Adhesive strength between face material and foam (g/25㎜) dimensional change rate
(%) flame retardant
(MJ/㎡) breathable
(L/min.cm ² ) Example 1 55 (Broken Foam) 201 0.3 0.2 0.3 Comparative Example 1 24 (interface dropout) 160 0.3 0.3 0.8 Comparative Example 2 49 (Broken Foam) 172 1.3 0.4 0.5

As shown in Table 1, it can be confirmed that the Example exhibits excellent adhesion strength, dimensional stability, flame retardancy and breathability even if the polyolefin-based composite nonwoven fabric layer does not contain glass fibers. For example, in Comparative Example 1 including a glass nonwoven fabric layer, the adhesion strength between the face material and the foam was also lowered during the adhesion strength test to the mortar, and the interface within the face material was dropped at 24 kPa. On the other hand, it can be seen that the embodiment has excellent adhesion strength between the face material and the foam, and the interfacial adhesion within the face material is improved, so that the interface does not fall off and the foam is broken, and it has a high adhesion strength of 55 kPa. And, unlike the comparative example, it can be seen that the example exhibits an improved effect in adhesion strength with the foam, and simultaneously exhibits excellent dimensional change rate, flame retardancy and air permeability. Although described above, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is apparent that various modifications may be made by those skilled in the art within the scope of the technical spirit of the present invention. In addition, even if the effect of the configuration of the present invention is not explicitly described and described while explaining the embodiment of the present invention, it is natural that the effect predictable by the configuration should also be recognized.

100: cotton
110: polyolefin-based composite non-woven fabric layer
120: glass scrim layer
130: metal layer
200, 200': insulation
10: foam

Claims (12)

A metal layer, a glass scrim layer, and a polyolefin-based composite nonwoven fabric layer
Face material for building insulation.
According to claim 1,
The metal layer includes one selected from the group consisting of iron, stainless steel (SUS), aluminum, magnesium, copper, and combinations thereof.
Face material for building insulation.
According to claim 1,
The polyolefin-based composite nonwoven fabric layer comprises polyolefin h (chop), pulp and a binder.
Face material for building insulation.
4. The method of claim 3,
The length of the polyolefin h (chop) is 10 mm to 25 mm
Face material for building insulation.
4. The method of claim 3,
The polyolefin h (chop) comprises one selected from the group consisting of polyethylene, polypropylene, and combinations thereof.
Face material for building insulation.
4. The method of claim 3,
The polyolefin-based composite nonwoven fabric layer comprises 20 wt% to 80 wt% of the polyolefin h (chop)
Face material for building insulation.
4. The method of claim 3,
25 to 170 parts by weight of the pulp relative to 100 parts by weight of the polyolefin h (chop)
Face material for building insulation.
4. The method of claim 3,
Comprising 10 parts by weight to 50 parts by weight of the binder relative to 100 parts by weight of the polyolefin h (chop)
Face material for building insulation.
4. The method of claim 3,
The binder includes one selected from the group consisting of (meth)acrylic resins, polyurethane resins, vinyl resins, styrene resins, and combinations thereof.
Face material for building insulation.
According to claim 1,
The polyolefin-based composite nonwoven fabric layer does not contain glass fibers.
Face material for building insulation.
According to claim 1,
The basis weight of the polyolefin-based composite nonwoven fabric layer is 30g/m2 to 50g/m2
Face material for building insulation.
According to claim 1,
further comprising an adhesive layer
Face material for building insulation.

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