JPH1029278A - Flame retardant laminate and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame retardant laminate adapted to an interior or exterior material for a building or a vehicle by preventing melting and flowing of resin at the time of burning and incorporating excellent flame retardant performance, excellent processing characteristics such as pelletizing or sheet- forming metallic characteristics on surface, and excellent light-weight properties. SOLUTION: The flame retardant laminate is obtained by using a composite material containing polyolefin (A), 10 to 50wt.% of metal hydroxide (B) and 5 to 20wt.% of olefin elastomer (C) satisfying the condition that the total amount of the components (B) and (C) is 20 to 70wt.% and having 0.05 to 10g/10min of melt flowability index [MI (190%; 2.16kgf) or MFR (230 deg.C; 2.16kgf)] as a core material sheet, and laminating them in a structure of aluminum plate/ adhesive film, adhesive/core material sheet/adhesive film or adhesive/aluminum plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD [0001] The present invention relates to a flame-retardant laminate comprising a core sheet and an aluminum plate (hereinafter sometimes abbreviated as the laminate of the present invention).
More specifically, in the event of a fire, it prevents the resin from melting out, has excellent flame retardancy, reduces the amount of metal hydroxide compounded, exhibits surface metal properties, is lightweight, and is excellent in workability such as sheet manufacturing. The present invention relates to a flame-retardant laminate suitable as an interior / exterior material for buildings, vehicles, and the like.

[0002]

2. Description of the Related Art A laminate in which a polyolefin resin core material sheet is sandwiched between metal plates has been conventionally known, and is widely used, for example, as door materials and veranda blindfold plates. However, the polyolefin resin which is the core material of these laminates is flammable, and it has been difficult to use it for applications such as fire-resistant materials (for example, flame-retardant materials) required for buildings.

[0003] There are several methods for making the core sheet flame-retardant, but the most widely used measure is to incorporate a flame retardant into a polyolefin resin. As the flame retardant, a halogen-based flame retardant comprising a combination of an organic halogen compound or the like and a flame retardant auxiliary such as antimony trioxide, an inorganic flame retardant comprising a metal hydroxide which is an inorganic filler exhibiting a flame retardant effect. And organic phosphorus-based flame retardants.

[0004] However, the above-mentioned laminate flame-retarded with a halogen-based flame retardant generates a large amount of black smoke from the core material layer upon contact with the flame, and also emits toxic and corrosive halogen gas (halogen vapor). Is generated, which has a problem of adversely affecting the human body and other devices.

On the other hand, with an inorganic flame retardant comprising a metal hydroxide, for example, magnesium hydroxide or aluminum hydroxide, there is almost no generation of black smoke or toxic gas due to contact with a flame. However, for example, Japanese Unexamined Patent Application Publication No.
As used in the invention described in JP-A No. 1 (1993), a large amount of an inorganic flame retardant must be added to impart sufficient flame retardancy, and it is difficult to form a pellet or sheet of the resin composition due to a decrease in fluidity. , And further impairs the lightness characteristic of the composite material.

Further, according to the use of an organic phosphorus-based flame retardant, the effect of adding the flame retardant is relatively small, but the melt fluidity index of the resin layer [MI (190 ° C .; 2.16 kgf) or MFR ( 230 ° C .; 2.16 kgf)], which also makes it difficult to pelletize and sheet the resin composition.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to prevent the resin from melting and flowing out at the time of fire, to have excellent flame retardancy, and to form pellets and sheets, which are the problems of the prior art as described above. It is an object of the present invention to provide a flame-retardant laminate exhibiting surface metal properties and excellent in lightness without impairing the processability of the method.

[0008]

Means for Solving the Problems The present inventors have conducted various studies to achieve the above object, and as a result, the addition of a metal hydroxide without reducing the flame retardancy by adding an olefin-based elastomer. The amount can be reduced, and a laminate having both workability and light weight has been successfully obtained. 1. Polyolefin (A), metal hydroxide (B)
50% by weight and olefin elastomer (C) 5 to 2
0% by weight, satisfying that the total amount of the components (B) and (C) is 20 to 70% by weight, and further having a melt fluidity index [MI (190 ° C .; 2.16 kgf) or M
FR (230 ° C; 2.16 kgf)] is 0.05 to 10
A flame-retardant laminate in which a composition of g / 10 min is used as a core material sheet and laminated on an aluminum plate / adhesive film or adhesive / core material sheet / adhesive film or adhesive / aluminum plate structure. 2. The flame-retardant laminate as described above, wherein the core sheet is foamed 1.1 to 5 times. 3. Polyolefin (A), metal hydroxide (B)
50% by weight and olefin elastomer (C) 5 to 2
0% by weight, satisfying that the total amount of the components (B) and (C) is 20 to 70% by weight, and further having a melt fluidity index [MI (190 ° C .; 2.16 kgf) or M
FR (230 ° C; 2.16 kgf)] is 0.05 to 10
g / 10 min. by melt-kneading the composition with an extruder to obtain pellets. Then, an aluminum plate / adhesive film or adhesive / core sheet obtained by melting the pellets / adhesive film / adhesive / A method for producing a flame-retardant laminate, which is sandwiched so as to have the structure of an aluminum plate, and pressure-formed from both outer sides of the aluminum plate.

The polyolefin (A) is a high-density polyethylene (HDPE), a medium-density polyethylene (MDP)
E), linear low density polyethylene (L-LDPE), low density polyethylene (LDPE), homopolymerized polypropylene or copolymerized polypropylene.
Examples of the metal hydroxide (B) include magnesium hydroxide, aluminum hydroxide, and calcium hydroxide. It is preferable to use magnesium hydroxide in consideration of the decomposition temperature during processing and combustion. The content of the metal hydroxide is 10 to 50% by weight in the components (A) and (B) and the component (C). When the content is within this range, the workability is excellent and the flame retardant effect is excellent.

[0010] The olefin-based elastomer (C) is an olefin-based elastic polymer mainly composed of an aliphatic unsaturated hydrocarbon, and is mainly composed of ethylene or / and propylene. Copolymers can be exemplified. The content of the olefin-based elastomer (C) is 5 to 20% by weight based on the total amount of the component (A), the component (B) and the component (C). The olefin-based elastomer has a melt fluidity index [MFR (230 ° C .; 2.16 kgf)].
However, if the Mooney viscosity is 0.1 to 4.0 g / 10 min and the Mooney viscosity is 20 to 80 ML _{1 + 4} (100 ° C.), it is desirable in view of the workability of the core sheet and the flame retardancy.

The total amount of the components (B) and (C) is 20 to 70% by weight. In the present invention, the total amount of the component (A) + the component (B) + the component (C) is set to 100% by weight, and other additions are indicated by external addition.

Further, the above components (A) and (C) include:
Maleic anhydride, acrylic acid, unsaturated carboxylic acids such as fumaric acid, and other resins can be modified or copolymerized or grafted with derivatives such as acid anhydrides or esters. A modified resin cross-linked by a cross-linking agent can also be used depending on the application. In the present invention, various fillers (or reinforcing agents) can be added to the above composition to such an extent that the flame retardancy is not substantially reduced. Examples of the filler used include fibrous fillers such as glass fiber, carbon fiber and vinylon fiber, flake-like fillers such as mica and talc, spherical fillers such as glass beads, and amorphous fillers such as calcium carbonate and wood chips. The surface of these fillers (or reinforcing agents) is preferably subjected to a treatment for imparting an affinity to the resin to be compounded. Examples of such treatment include addition of an unsaturated carboxylic acid or an acid anhydride thereof, addition of an unsaturated amine, and coating with rubber.

It is desirable that halogen-based flame retardants not be used because they generate black smoke during combustion and generate toxic and corrosive halogen gas, which adversely affects the human body and other equipment. However, a halogen-based, phosphorus-based, or other flame retardant can be added as long as the object of the present invention is not impaired. However, since some of these flame retardants chemically react with the metal hydroxide and have the effect of inhibiting the flame retardancy, care must be taken in selecting the flame retardant to be added. Furthermore, extenders, coloring agents, deterioration inhibitors, antistatic agents,
A lubricant and the like can be added as needed.

The melt fluidity index of the composition is from 0.05 to
10.0 g / 10 min. In the case of a polypropylene-containing composition, it was measured as MFR (230 ° C .; 2.16 kgf).
° C; 2.16 kgf). Within this range, the sheet is excellent in workability, for example, a smooth sheet can be produced at the time of sheet extrusion, prevents the resin from melting out during a fire, and has excellent flame retardancy.

The aluminum plate is a thin plate or foil made of aluminum or an aluminum alloy, and preferably has a thickness of 100 to 1000 μm, more preferably 2 μm.
It is 00 to 1000 μm. An aluminum plate having this thickness is excellent in flame retardancy and lightness. Further, from the viewpoint of corrosiveness, it is preferable that the inner surface (the surface to be bonded to the core sheet) of these aluminum plates is subjected to anticorrosion treatment such as chromate or alumite. Further, the outer surface (the outer surface of the laminated composite) is generally subjected to, for example, painting and anticorrosion treatment. When these coatings and anticorrosives are not flame-retarded, the solid content of the coatings and anticorrosives applied in order not to impair the flame retardancy of the composite board is 200 g / m ² or less, preferably 100 g / m ² or less. And

[0016] Between the core sheet and the aluminum plate,
The peel strength is increased by the interposition of the adhesive or the adhesive film. In the case of the adhesive, an epoxy compound-based or urethane compound (isocyanate) -based adhesive can be exemplified,
The thickness of the adhesive is about 0.5 to 50 μm. When laminating an adhesive film, an unsaturated carboxylic acid or its anhydride is grafted onto a polyolefin resin.
An adhesive film of 0 to 100 μm, preferably 30 to 80 μm is used between the core sheet and the aluminum plate.

The laminated structure of the flame-retardant laminate of the present invention is: aluminum plate / adhesive film or adhesive / core sheet / adhesive film or adhesive / aluminum plate. From the viewpoint of productivity, it is desirable to use this adhesive film. When the flame-retardant laminate is a foamed core sheet, the expansion ratio is 1.1 to 5 times. The use of this foamed sheet leads to a reduction in the weight of the laminate itself while having more excellent heat insulating and sound insulating capabilities. The foamed core material sheet is a sheet formed by gas foaming or chemical foaming. The gas is desirably N ₂ or CO ₂ , and the chemical foaming agent is a sulfonic acid hydrazide compound, an azo / diazo compound or sodium bicarbonate. Foaming agents.

[Production Method of Flame Retardant Laminate] The method for producing a flame retardant laminate of the present invention comprises a polyolefin (A), 10 to 50% by weight of a metal hydroxide (B), and an olefin-based elastomer (C). 5 to 20% by weight, satisfying that the total amount of the components (B) and (C) is 20 to 70% by weight, and further has a melt fluidity index [MI (190 ° C;
2.16 kgf) or MFR (230 ° C .; 2.16 k
gf)] is from 0.05 to 10 g / 10 min by melt-kneading with an extruder to obtain pellets, and then aluminum sheet / adhesive film or adhesive / core sheet obtained by melting the pellets. / Adhesive film or adhesive / Aluminum plate, and press molding from both outer sides of the aluminum plate.

Example of Manufacturing Method of Core Material Sheet The above-mentioned polyolefin (A) is mixed with the above-mentioned metal hydroxide (B), olefin-based elastomer (C), and other additives, etc., using a suitable stirring and mixing device such as a Henschel mixer (product) ), Super mixer or tumbler mixer. After the charging, stirring and mixing are performed for 1 to 10 m.
After continuing in, a well-mixed composition is obtained. The obtained well-mixed composition is further melt-kneaded using a roll kneader or a screw extruder, and then granulated (pelletized) to obtain pellets. The obtained pellets are melt-molded into a sheet having an arbitrary thickness by a suitable means such as a hot press or an extruder equipped with a T-die to form a core material sheet. The core material sheet may be stored and used after being cooled, or may be continuously used in a molten state.

Next, a flame-retardant laminate is obtained by interposing an adhesive film or an adhesive between the core sheet and the aluminum plate and applying pressure.

The manufacturing method using the stored core material sheet and adhesive film is as follows. After laminating on the aluminum plate / adhesive film / stored core material sheet / adhesive film / aluminum plate, heat and pressure are applied by a hot press. . The manufacturing method using a core sheet in a molten state and an adhesive film is as follows: aluminum plate / adhesive film / core sheet in a molten state /
There is also a method of heating and pressing with a hot press after laminating on an adhesive film / aluminum plate. The continuous production method using a core sheet in a molten state and an adhesive film is performed by stacking on an aluminum plate / adhesive film / core sheet in a molten state / adhesive film / aluminum plate and then continuously pressing with a nip roll. There is a manufacturing method.

Specific Example of Manufacturing Method of Continuous Flame Retardant Laminate A core material sheet in a molten state is produced by an extruder equipped with a T-die, and an adhesive film is laminated from both sides of the core material sheet. Laminate aluminum plates from both sides,
These multi-layers are continuously supplied between the nips of a pair of counter-rotating laminating rolls and are squeezed while being pressed and adhered to each other. A laminate is continuously manufactured. In this method, it is important that the laminating roll has a temperature and a pressure sufficient to join the aluminum plate and the core sheet via the adhesive film layer.

As a modification, a manufacturing method using a hot press can be employed, but since it is not compatible with integrated manufacturing, it exerts its power when it is difficult to perform integrated manufacturing. That is, the present invention can be flexibly adapted to a production mode in which specifications such as the use of a core material sheet and / or a metal sheet and / or the use of an adhesive or the use of an adhesive polyolefin resin layer are required for every several products.

As a method of using an adhesive, 1) a method of applying an adhesive to both sides of a core material sheet, 2) a method of applying an adhesive to an inner surface of an aluminum plate, and 3) a method of applying an adhesive to an upper surface of a core material sheet There is a method of applying an adhesive and applying an adhesive on the upper surface of the lower aluminum plate. After the application, an aluminum plate / adhesive / core sheet / adhesive / aluminum plate;
And pressurized. In the case where the core sheet stored here is also used, the core sheet in a molten state may be continuously manufactured.

A method for producing a foamed flame-retardant laminate in which the core material sheet is foamed is a method of directly injecting gas at the time of sheet molding or a method of adding a composition containing a chemical foaming agent to an extruder to form a foamed core material sheet. Make it. The foamed core material sheet is laminated as described above to produce a foamed flame-retardant laminate.

[0026]

The present invention will be described below in detail with reference to examples and, where necessary, comparative examples. However, the scope of the present invention is not limited to the examples. Embodiments in which additions and / or changes, etc., which can be easily made by those skilled in the art, are also included in the scope of the present invention.

[Test Method and Conditions in Examples] (1) Method for Producing Core Sheet Pellets of the flame-retardant polyolefin resin obtained in each example and each comparative example were obtained, and the melt fluidity index was measured. ,
After melt-kneading the pellets, the T-die method (die temperature; 18
0 ° C) to make a sheet of flame-retardant polyolefin resin (length 2)
20 mm x 220 mm x 3 mm).

(2) Production method of flame-retardant laminate The obtained flame-retardant polyolefin sheet is used as a core material sheet, and a film (thickness: 30 μm) of a predetermined adhesive polyolefin resin is laid on both sides thereof, and aluminum is placed thereon. The thin plate is placed and thermocompression-bonded by a hot press (140 ° C x 5 mi
n) to obtain a laminate of predetermined dimensions (length 220 mm x width 220 m)
mx 3 mm). A test piece was obtained by piercing (25 mm in diameter) the laminate using a hole saw.

(3) Evaluation of workability Based on the above (1), those which can produce a smooth sheet by the T-die method have good workability (○), and it is difficult to produce a smooth sheet by the T-die method. Were evaluated as poor workability (x). (4) Evaluation of Flame Retardancy Evaluation of the flame retardancy in the experimental examples (general term of Examples and Comparative Examples) is based on the additional test (hereinafter referred to as "flame retardant") in the flame retardancy test method of the interior material and construction method of JISA1321 building. In some cases, the weight loss of the test specimen before and after the test is measured as the total amount of resin that has burned and spilled out (that is, there is a risk of fire spread), and this is 3.0 g or less. Those having good flame retardancy (O) and those exceeding 3.0 g were poor flame retardancy (X).

[0030]

Example 1 High-density polyethylene [HDPE-1; density 0.964 g / cc; MI (1) as a constituent component of a polyolefin resin (hereinafter abbreviated as “component (P)”)
90 ° C; 2.16 kgf) 1.80 g / 10 min] 6
0% by weight of magnesium hydroxide (hereinafter abbreviated as “component (Q)”) [trade name: Kisuma (manufactured by Kyowa Kagaku)] 30% by weight and an olefin-based thermoplastic elastomer (hereinafter abbreviated as “component (R)”) [product Name: JSREP (manufactured by Nippon Synthetic Rubber Co., Ltd.)] and added to a Henschel mixer (trade name).

Further, the sum of the above components [(P) + (Q)]
+ (R)] with respect to 100 parts by weight of n-octadecyl-β- (4′-hydroxy-
0.03 parts by weight of 3 ', 5'-di-t-butylphenyl) propionate and 0.1 part by weight of calcium stearate were also charged into a Henschel mixer (trade name) and stirred and mixed for 3 minutes.

The resulting mixture is extruded (45 mm diameter).
After melt-kneading (200 ° C.) in the medium, it was extruded into pellets. The obtained pellets were melt-kneaded and a core material sheet was obtained by a T-die method (die temperature: 180 ° C.). Adhesive polyolefin films on both sides of the core sheet [trade name:
Cranbetter (manufactured by Kurashiki Spinning Co., Ltd.)], and sandwiched between two aluminum sheets from both outer sides with an aluminum sheet (layer thickness: 200 μm; abbreviated as “AL”), and pressed with a hot press (140 ° C.) ( 5 min) to give the flame-retardant laminate of the present invention [total thickness 3 mm; AL // HDPE // AL]
Was prepared. After a hole of a predetermined size was formed in the laminate using a hole saw, the above-described flame retardancy test was performed. Table 1 shows the results.

[0033]

Example 2 A chemical foaming agent azodicarbonamide (abbreviated as "component (S)" in the table) was added to pellets prepared using the above components (P), (Q) and (R). 0.5 parts by weight) and spread using liquid paraffin. This is formed into a film with an extruder,
Using the obtained foam sheet having an expansion ratio of about 2.0, a foam sheet was prepared in the same manner as in Example 1 and subjected to a flame retardancy test. Table 1 shows the results.

[0034]

Examples 3 to 5 and Comparative Examples 1 and 2 The amounts of magnesium hydroxide as the component (Q) and the olefinic thermoplastic elastomer as the component (R) were adjusted to the amounts shown in Table 1. A laminate was prepared in the same manner as in Example 1 except for the change, and a flame retardancy test was performed. Table 1 shows the results.

[0035]

Comparative Examples 3 to 6 The amount of magnesium hydroxide as the component (Q) was changed to the amount shown in Table 1, and Example 1 was repeated without adding the olefinic thermoplastic elastomer as the component (R). A laminate was prepared in the same manner and a flame retardancy test was performed.
Note that it was difficult to prepare a smooth sheet by the T-die method for Comparative Example 6, so that it was 5 m in a hot press (180 ° C.).
A laminate was prepared and subjected to a flame retardancy test in the same manner as in Example 1 except that the core material sheet was obtained by in-melt pressing. Table 1 shows the results.

[0036]

Comparative Examples 7 to 10 The same procedure as in Example 1 was carried out except that magnesium hydroxide as the component (Q) was not added and the amount of the olefinic thermoplastic elastomer as the component (R) was changed to the amount shown in Table 1. A laminate was prepared in the same manner and a flame retardancy test was performed. Table 1 shows the results.

[0037]

Examples 6 and 7 A propylene homocrystalline polymer [abbreviation: PP-
1. Density 0.910 g / cc; MFR (230 ° C .;
16 kgf) 2.30 g / 10 min] as Example 6, and Example 7 using a mixture of HDPE-1 and PP-1 at a ratio of 1: 1 as Example 7. Similarly, a laminate was prepared, and a flame retardancy test was performed.
Table 2 shows the results.

[0038]

Examples 8 to 10 Examples 8 and 9 were made in the same manner as in Example 1 except that aluminum thin plates having a total thickness of 100 μm and 1000 μm were used as the aluminum thin plates to be placed on both sides of the laminate. Total thickness 200μ
m coated aluminum sheet (applying resin amount of about 80g /
A flame retardancy test was performed as Example 10 except that m ² ) was used. Table 2 shows the results.

[0039]

Examples 11 and 12 HDPE-2 [density 0.964; MI7.
50 g / 10 min] and HDPE-3 [density 0.95
0; MI 0.05 g / 10 min] were used as Examples 11 and 12, respectively, to produce laminates, which were subjected to a flame retardancy test. Table 2 shows the results.

[Findings of Experimental Examples] (1) From Table 1 showing the results of the flame retardancy tests obtained in Examples 1 to 6 and Comparative Examples 1 to 7, the following can be observed: Examples The laminate of Example 1 has good smoke emission and flame retardancy, and hardly loses weight due to burning during the test or outflow of the molten resin.

The laminate of Example 2 had good flame retardancy as in Example 1. That is, it is determined that the present resin composition can maintain flame retardancy regardless of foaming / non-foaming.
However, to cause extreme decrease in rigidity of the core sheet,
The expansion ratio is practically 5.0 times or less.

The laminates of Examples 3 to 6 had good flame retardancy as in Example 1. On the other hand, the laminates of Comparative Examples 1 and 2 have a large weight loss and are judged to be poor in flame retardancy. That is, if the sum of the amounts of the components (Q) and (R) added is 20% by weight or more, it is determined that the flame retardancy is good.

The laminates of Comparative Examples 3 to 5 are poor in flame retardancy and have a large weight loss. In contrast, the laminate of Comparative Example 6 has a small weight loss. That is, in order to impart sufficient flame retardancy with only magnesium hydroxide as the component (Q), it is necessary to add 70% by weight or more, which causes an increase in specific gravity and a decrease in workability.

The laminates of Comparative Examples 7 to 10 have a large weight loss. That is, it is difficult to impart sufficient flame retardancy with only the olefin-based thermoplastic elastomer as the component (R).

(2) From Table 2 showing the results of the flame retardancy tests obtained in Examples 6 to 12, the following is observed: The laminates of Examples 6 and 7 are the same as in Example 1. Had good flame retardancy. That is, if the basic constitution is not changed, sufficient flame retardancy can be obtained even if a propylene homopolymer or a mixture of an ethylene homopolymer and a propylene homopolymer is used as the polyolefin resin.

The laminates of Examples 8 to 10 had good flame retardancy as in Example 1. That is, the aluminum thin plates placed on both sides of the laminate are effective in the range of 100 μm to 1000 μm, and even when these aluminum thin plates are coated, sufficient flame retardancy can be obtained.

The laminates of Examples 11 and 12 had good flame retardancy as in Example 1. That is, the polyolefin resin used as the base material of the core material sheet has a melt fluidity index [M
I (190 ° C .; 2.16 kgf) or MFR (230
° C; 2.16 kgf)] at least 10.0 g / 1
It is effective at 0 min or less.

[0048]

EFFECT OF THE INVENTION The flame-retardant laminate of the present invention comprises a composition comprising a polyolefin (A), a metal hydroxide (B), and an olefin-based elastomer (C) as a core material sheet. Was laminated with an aluminum plate, and the mixing ratio of component (A), component (B) and component (C) and the melt fluidity index were specified. In this laminate, the residue of combustion of the metal hydroxide (B) in the core material layer at the time of combustion exhibits a structure to be called a sponge-like skeleton, and at the same time, the resin itself of the components (A) and (C) Due to the effect of the melt viscosity of the resin, resin outflow during combustion was prevented, and flame retardancy was obtained. The flame-retardant laminate of the present invention prevents the resin from melting out under the conditions of contact with a flame or high heat at the time of fire, is excellent in flame retardancy, is excellent in prevention of fire spread to peripheral parts in fire and self-extinguishing property. Was.

The flame-retardant laminate of the present invention can reduce the amount of metal hydroxide added without reducing the flame retardancy of the core resin by adding an olefin elastomer, and has both processability and light weight. A laminate was obtained. Furthermore, the foamed flame-retardant laminate was able to reduce the amount of organic substances per unit volume, and was able to maintain flame retardancy while suppressing the amount of flame retardant and the like used. The flame-retardant laminate of the present invention hardly generates black smoke or toxic gas during combustion. The flame-retardant laminate of the present invention, while exhibiting its surface metal properties, is lightweight, realizes an increase in specific strength, increases rigidity, heat distortion temperature, heat insulation, weather resistance, sound insulation, and coldness. It has various properties such as workability. Therefore, the flame-retardant laminate of the present invention can be suitably used as an interior / exterior material for buildings, vehicles, and the like.

[0050]

[Table 1]

[0051]

[Table 2]

Claims (3)

[Claims] 1. A polyolefin (A), 10 to 50% by weight of a metal hydroxide (B) and 5 to 20% by weight of an olefin elastomer (C), wherein the total amount of the components (B) and (C) is 20 to 70% by weight, and a melt fluidity index [MI (190 ° C .; 2.16
kgf) or MFR (230 ° C; 2.16 kgf)]
Is a core material sheet, and is laminated on an aluminum plate / adhesive film or adhesive / core sheet / adhesive film or adhesive / aluminum plate structure Laminate. 2. The flame-retardant laminate according to claim 1, wherein the core sheet is foamed 1.1 to 5 times. 3. A polyolefin (A), 10 to 50% by weight of a metal hydroxide (B) and 5 to 20% by weight of an olefin-based elastomer (C), wherein the total amount of the components (B) and (C) is 20 to 70% by weight, and a melt fluidity index [MI (190 ° C .; 2.16
kgf) or MFR (230 ° C; 2.16 kgf)]
Is melt-kneaded with an extruder to obtain pellets, and then an aluminum plate / adhesive film or adhesive / core sheet obtained by melting the pellets / adhesiveness A method for producing a flame-retardant laminate in which a film or an adhesive / aluminum plate is sandwiched so as to have a structure, and pressure molding is performed from both outer sides of the aluminum plate.