JP2003260765A - Laminated sheet and molding using the sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated sheet excellent in heat resistance and high- temperature extensibility, and also to provide a molding using the laminated sheet. <P>SOLUTION: An olefin resin sheet having a thickness of 80 to 200 μm and an apparent density of 0.60 to 0.92 g/cm<SP>3</SP>is laminated on at least on one surface of an olefin resin crosslinked foam consisting of an olefin resin in which at least one of melting endothermic peak temperatures by a differential thermal analysis is 148°C or higher. The molding uses thus laminated resin sheet. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention provides a flexible, low-density foam and a sheet having excellent heat resistance, thereby providing flexibility,
The present invention relates to a laminated sheet that is low in cost and excellent in hot stamping moldability, and a molded product using the laminated sheet.

[0002]

2. Description of the Related Art Generally, an olefin resin foam is lightweight and has excellent high temperature characteristics, flexibility and moldability, and thus has been widely used as a vehicle interior material by stamping molding of doors, instrument panels and the like. ing. Such an interior material is disclosed in Japanese Patent Laid-Open No. 10-1276.
Japanese Patent Laid-Open Publication No. 58-58 discloses a stamping composite sheet in which a foamed sheet having an apparent density of 0.33 to 0.91 g / cm ³ is attached to at least one surface of a polyolefin resin foam.

However, although the above foamed sheet can obtain sufficient heat resistance, since the elongation balance in MD and TD of the laminated composite is poor, the elongation becomes low as a whole. There is a problem that irregularities are generated on the surface of the molded product due to breakage of the composite.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated sheet excellent in heat resistance and high-temperature elongation and a molded product using the laminated sheet.

[0005]

The laminated sheet of the present invention comprises:
At least one of melting endothermic peak temperatures by differential thermal analysis is made of an olefin resin having a temperature of 148 ° C. or higher, a density of 0.025 to 0.040 g / cm ³ , and a gel fraction of 20 to
At least one side of the olefin resin crosslinked foam which is 50% has a thickness of 80 to 200 μm and an apparent density of 0.60.
A laminated sheet in which olefin resin sheets having a weight ratio of up to 0.92 g / cm ³ are laminated, and the elongation of the laminated sheet at 120 ° C. and 140 ° C. is in the machine direction (hereinafter referred to as MD) and the width direction (hereinafter referred to as MD). It is characterized by being 350% or more in TD).

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION (Olefin-based resin crosslinked foam)
The olefin resin crosslinked foam can be bonded to the olefin resin sheet via heat fusion or an adhesive, and can also be bonded to the skin material via heat fusion or an adhesive. . In the combination of the olefin resin cross-linked foam and the olefin resin sheet, the heat of the base material at the time of molding and the impact of injection do not cause a defect on the surface of the molded product, so that it has excellent heat resistance and flexibility. It is necessary to improve the elongation of the foam itself in order to obtain an elongation of 350% or more at 120 and 140 ° C. as a laminated sheet, which can be increased in magnification for improvement.

In order to meet the above requirements, if the melting endothermic peak of the olefin-based crosslinked foam is reduced by the differential thermal analysis, the heat resistance and high temperature elongation of the olefin-based resin crosslinked foam are reduced, so that the laminated sheet is obtained. In order to obtain sufficient moldability, at least one of the melting endothermic peaks should be 1
Limited to 48 ° C or higher.

Further, when the density of the crosslinked olefin resin foam becomes small, it is impossible to impart sufficient heat resistance and high temperature elongation to the laminated sheet. On the other hand, when the density is high, the flexibility of the laminated sheet is reduced and the performance as a laminated sheet cannot be obtained.
Limited to 0 g / cm ³ .

Further, the gel fraction is mentioned as a measure of the crosslinked state of the olefin resin crosslinked foam, and when the gel fraction of the obtained olefin resin crosslinked foam becomes small, the heat resistance of the olefin resin crosslinked foam, The mechanical strength is lowered, sufficient moldability cannot be imparted to the laminated sheet, and when it becomes large, flexibility, elongation and high magnification are impaired, so the content is limited to 20 to 50%.

Here, the gel fraction in the present invention means that the weight (Ag) of the olefin-based crosslinked foam is weighed and immersed in xylene at 120 ° C. for 24 hours to obtain a residual of 200.
After filtering with a mesh wire mesh, the insoluble matter on the wire mesh was vacuum dried, and the weight (Bg) at that time was measured and calculated by the following method. Gel fraction (%) = 100 × B / A

The resin used for the crosslinked olefin resin foam satisfying the above-mentioned performance is not particularly limited as long as it is an olefin resin satisfying the above range. For example, as the polypropylene resin, homopolypropylene, Examples thereof include a copolymer with another monomer containing propylene as a main component, and an olefin-based thermoplastic elastomer containing a propylene-based resin such as an ethylene-propylene-butene three-dimensional copolymer.

Examples of the above-mentioned copolymer containing polypropylene as a main component and another monomer include propylene-α.
-Olefin copolymers. Propylene-α-
The olefin copolymer may be a block copolymer, a random copolymer or a random block copolymer, and these may be used alone or in combination. Examples of the α-olefin include ethylene, 1-butene, 1-pentene, 1-hexene, 4-
Methyl-1-pentene, 1-heptene, 1-octene and the like can be mentioned.

Among these, a mixture of a resin obtained by further adding homopolypropylene to a mixture of ethylene-propylene copolymer and polyethylene resin, which is generally used as a conventional foam structure, is preferable. As the polyethylene-based resin, in addition to ethylene homopolymer, ethylene having α as a main component and copolymerizable with ethylene and α-
It refers to a copolymer with an olefin, and examples thereof include low density polyethylene, ultra low density polyethylene, linear low density polyethylene, medium density polyethylene, and high density polyethylene. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene and the like.

As for the mixing ratio of each of the above resin mixtures, when the homopolypropylene content is large, the strength is improved.
On the contrary, the flexibility is lowered, the foamability is impaired, and if the amount is small, heat resistance and elongation at high temperature cannot be obtained, so 7 to 20 parts by weight is preferable. Further, the ethylene-propylene copolymer is preferably 50 to 80 parts by weight because if it is too large, the flexibility decreases, and if it is too small, the mechanical strength is impaired. Further, when polyethylene is used in a large amount, the heat resistance is impaired, and when polyethylene is used in a small amount, the flexibility is reduced.

Next, a method for producing an olefin resin crosslinked foam will be described. As a method for producing the olefin-based resin crosslinked foam, any known method for producing a foam can be used. For example, the following production method can be mentioned. A foaming resin composition obtained by extruding the foaming resin composition after adding a crosslinking aid to the foaming resin composition consisting of the olefin resin and the thermal decomposition type foaming agent, if necessary. After a predetermined amount of ionizing radiation is applied to the resin to give a crosslinkable structure to the foamable resin molding, the crosslinked foamable resin molding is heated to a temperature not lower than the decomposition temperature of the thermal decomposition type foaming agent to obtain an olefin resin. A method for producing a crosslinked foam. In the expandable resin composition consisting of the olefin resin and the thermal decomposition type foaming agent, after adding a crosslinking agent and a crosslinking aid if necessary,
This foamable resin composition is supplied to an extruder and melt-kneaded to extrude a foamable resin molded body, and the obtained foamable resin molded body is decomposed by the heating roll and the like at the same time as the extrusion of the heat-decomposable foaming agent. Examples thereof include a method of producing an olefin-based crosslinked foam by heating at a temperature equal to or higher than the temperature.

Furthermore, the width, length and thickness of the foamed product are adjusted by expanding the foamed product obtained by heating in the longitudinal and transverse directions, respectively, and the resin is oriented by the expansion in the longitudinal and transverse directions. Since the distortion remains, the elongation may decrease due to the balance of the width expansion in the vertical and horizontal directions. Where MD
And to obtain a foam excellent in TD elongation, MD,
The TD widening ratio (sheet length m after foaming / sheet length m before foaming) is preferably 2 to 4.

The thermal decomposition type foaming agent is not particularly limited as long as it is one that has been conventionally used for producing foams.
For example, azodicarbonamide, dinitrosopentamethylenetetramine, hydrazodicarbonamide, azodicarboxylic acid barium salt, nitrosoguanidine, p, p'-
Oxybisbenzenesulfonyl semicarbazide, benzenesulfonyl hydrazide, N, N'-dinitrosopentamethylenetetramine, toluenesulfonyl hydrazide,
4,4-oxybis (benzenesulfonyl hydrazide), azobisisobutyronitrile and the like can be mentioned. Among these thermal decomposition type foaming agents, azodicarbonamide is preferable.

The amount of the thermal decomposition type foaming agent added is appropriately adjusted, but if it is large, it may break, and if it is small, it may not foam. Therefore, 1 part is added to 100 parts by weight of the olefin resin. -50 parts by weight is preferable, and 1-30 parts by weight is more preferable. The cross-linking aid is not particularly limited as long as it is used in foam production, for example,
Triallyl trimellitate, triallyl melitate, diallyl melitate, diallyl phthalate, divinylbenzene, trimethylolpropane trimethacrylate,
1,9-nonanediol dimethacrylate, 1,10-
Decanediol dimethacrylate, trimellitic acid triallyl ester, triallyl isocyanurate, ethyl vinylbenzene, neopentyl glycol dimethacrylate, 1,2,4-benzenetricarboxylic acid triallyl ester, 1,6-hexanediol dimethacrylate, etc. These may be used alone or in combination.

The addition amount of the above-mentioned cross-linking aid is appropriately adjusted, but if it is too large, the cross-linking of the foamable resin molded article may proceed excessively to hinder foaming, and if it is too small, the effect of addition cannot be obtained. With respect to 100 parts by weight of the olefin resin, 0.5 to 20 parts by weight is preferable, and 2.0 to 10 parts by weight is more preferable.

The cross-linking agent is not particularly limited as long as it can be used in the production of foams, and examples thereof include isobutyl peroxide, dicumyl peroxide and 2,5-.
Dimethyl-2,5-di (t-butylperoxy) hexane-3,1,3-bis (t-butylperoxyisopropyl) benzene, t-butylcumyl peroxide, di-t-butylperoxide, t- Butyl peroxybenzoate, cyclohexane peroxide, 1,1-
Bis (t-butylperoxy) cyclohexane, 1,1
-Bis (t-butylperoxy) 3,3,5-trimethylcyclohexane, 2,2-bis (t-butylperoxy) octane, n-butyl-4,4-bis (t-butylperoxy) vellate, Benzoyl peroxide,
Cumyl peroxide, cumyl peroxy neodecanoate, 2,5-dimethyl-2,5-di (benzoyloperoxy) hexane, t-butyl peroxy isopropyl carbonate, t-butyl peroxy allyl carbonate, t-butyl peroxy Examples thereof include acetate, 2,2-bis (t-butylperoxy) butane, di-t-butylperoxyisophthalate, and t-butylperoxymaleic acid.

If the amount of the above-mentioned cross-linking agent added is too large, the cross-linking density may be too high to cause foaming. If it is too small, the cross-linking density may be insufficient and the shear viscosity required for foaming may not be obtained. 0.1 to 10 parts by weight is preferable with respect to 100 parts by weight of the olefin resin.

The ionizing radiation is not particularly limited as long as it has been conventionally used for crosslinking a foamable resin composition, and examples thereof include α rays, β rays, γ rays and electron rays. .

In the foamable resin composition, in addition to the above-mentioned crosslinking aid, phenol-based, phosphorus-based, such as 2,6-di-butyl-p-cresol, etc.
Antioxidants such as amine-based and dilaurylthiodipropionate; metal-harmful inhibitors such as methylbenzotriazole, phosphorus-based, nitrogen-based, halogen-based, antimony-based, and flame retardants, fillers, electrified mixtures of these Inhibitors, pigments and the like may be added.

(Olefin-Based Resin Sheet) The above-mentioned olefin-based resin sheet can be heat-sealed with the olefin-based resin cross-linked foam or can be bonded to the olefin-based resin cross-linked foam with an adhesive, and can also be bonded to the base material of the thermoplastic resin. It is possible to prevent damage due to heat of the base material at the time of molding and shear stress at the time of flow, and it is possible to reduce the wall thickness to improve flexibility, and since it does not break at the time of molding, MD and TD Is preferably excellent in elongation.

In order to satisfy the above requirements, if the thickness is thin, the heat resistance and the elongation are lowered, and if the thickness is thick, the flexibility and the wrinkle at the time of molding may occur.
Limited to Further, when the apparent density is low, heat resistance and elongation are lowered, and when the apparent density is high, flexibility is lowered.
Limited to 0.92 g / cm ³ . Furthermore, in order to obtain an elongation of 350% or more at 120 and 140 ° C. as a laminated sheet, it is necessary to improve the elongation of the sheet itself.

The resin used for the olefin resin sheet satisfying the above-mentioned performance is not particularly limited as long as it satisfies the above range with the olefin resin. For example, as polypropylene resin, homopolypropylene and propylene are the main components. In addition to copolymers with other monomers, homopolypropylene, copolymers with other monomers containing propylene as a main component, olefins containing propylene-based resins such as ethylene-propylene-butene three-dimensional copolymers Examples include thermoplastic elastomers.

Examples of the copolymer with the other monomer containing polypropylene as the main component include, for example, propylene-α.
-Olefin copolymers. Propylene-α-
The olefin copolymer may be a block copolymer, a random copolymer or a random block copolymer, and these may be used alone or in combination. Examples of the α-olefin include ethylene, 1-butene, 1-pentene, 1-hexene, 4-
Methyl-1-pentene, 1-heptene, 1-octene and the like can be mentioned.

The polyethylene resin includes ethylene homopolymers and copolymers of ethylene as a main component with ethylene and an α-olefin copolymerizable with ethylene, such as low density polyethylene and ultra low density. Polyethylene, linear low density polyethylene, medium density polyethylene,
Examples include high-density polyethylene. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene and the like. Among these resins, reactor-type olefin-based thermoplastic elastomers are particularly preferable for the reason that they exhibit the above performance.

The olefin-based resin sheet is laminated on the olefin-based resin crosslinked foam while being stretched by a roll from an extruder. If the stretching ratio in the machine direction, that is, the line speed during extrusion is large, the resin is oriented, The line speed is preferably 5 m / min or less because the strain as a residual sheet lowers the elongation as a laminated sheet.

(Laminated sheet) In the laminated sheet of the present invention, if the elongation at 120 ° C. and 140 ° C. is low, the laminated sheet may be broken by heat or shear during molding, resulting in unevenness on the surface of the molded body. Therefore, both MD and TD are limited to 350% or more. This can be achieved by combining the olefin resin crosslinked foam and the olefin resin sheet.

(Surface material) The skin material to be laminated on the laminated sheet of the present invention is not particularly limited as long as it is used as a skin material. For example, polyvinyl chloride sheet, polyvinyl chloride / ABS mixture. A sheet, a thermoplastic elastomer sheet, a fiber knitted fabric, a non-woven fabric and the like can be mentioned.

(Thermoplastic Resin Base Material) The thermoplastic resin used as the base material of the molded article using the laminated sheet in the present invention is not particularly limited as long as it is used as the base material. , As polypropylene resin,
Polypropylene resin, polypropylene resin in which polypropylene and α-olefin are copolymerized; polyethylene resin, copolymer resin in which ethylene and α-olefin are copolymerized; polyethylene resin in which monomers such as vinyl acetate, acrylic acid, and acrylate ester are copolymerized, and Examples thereof include resins in which these are arbitrarily mixed.

Further, an inorganic compound such as talc, silicic acid or calcium carbonate may be mixed with these resins as a filler as long as the characteristics of the resin substrate are not impaired. Also,
Known heat stabilizers, antioxidants, nucleating agents, colorants and the like may be added to the base resin as required. In addition, an ABS resin, polystyrene resin, petroleum resin, or other non-olefin resin may be added as long as the moldability is not impaired. Further, the resin may be foamed or crosslinked.

(Hot Stamping Manufacturing Method) The hot stamping molding method used in the present invention is not particularly limited as long as it is a known method, but it will be described in detail below. First, a thermoplastic resin for forming a base material layer is placed in a lower mold of a molding die including an upper mold and a lower mold. The thermoplastic resin is arranged in a molten dumpling or sheet form.
The temperature of the thermoplastic resin varies depending on the material, but usually 1
It is set to about 70 ° C to 230 ° C. Next, the laminated sheet having the outer skin laminated on the thermoplastic resin arranged in the lower mold is arranged. Here, the laminated sheet is arranged so that the skin material faces the upper mold. The laminated sheet is usually placed at room temperature, but may be placed by heating depending on the shape of the molded product. Next, the forming die is closed by pressing the upper die against the lower die. As a result, the laminated sheet is pressed against the thermoplastic resin and molded into a predetermined shape. at the same time,
The molten thermoplastic resin is fused to the olefin resin sheet of the laminated sheet to integrate them. As a result, any molded product can be obtained. The pressure when the mold is closed is usually set to about 500 to 13000 kPa.

Examples of the present invention will be described below. (Example 1) As an olefin resin crosslinked foam,
The melting endothermic peak by thermal analysis is 160 ° C and the flexural modulus is
2 x 10⁶kPa, MI is 14.0 g / 10 minutes, and
Density 0.90g / cm³Is homopolypropylene 1
5 parts by weight, melting endothermic peak by differential thermal analysis is 150
℃, flexural modulus 10⁶kPa, MI is 3.0g / 10
Min and density 0.90 g / cm³Is ethylene-
65 parts by weight of propylene copolymer, melted by differential calorimetric analysis
Desorption endothermic peak is 120 ° C, flexural modulus is 2 × 10 ^FivekP
a, MI is 2.5 g / 10 min and density is 0.92 g / c
m³20 parts by weight of linear low-density polyethylene, crosslinked
Trimethylolpropane trimethacrylate as auxiliary agent
3.0 parts by weight, azodicarboxylic acid as a thermal decomposition type foaming agent
10 parts by weight of amide, and 2,6-diamine as an antioxidant
0.3 parts by weight of -t-butyl-p-cresol and dilaur
0.3 parts by weight of rilthiodipropiolate was added to the twin-screw extruder.
Supply and extrude at a resin temperature of 190 ℃, thickness 1.50mm
A foamable resin composition sheet of was obtained. On the obtained sheet,
Irradiating with an electron beam of 1.5 Mrad at an acceleration voltage of 800 kV
The crosslinked foamable resin composition sheet obtained by crosslinking is 25
Foam for 5 minutes at 0 ° C, and use a widening device to
Olefin-based resin crosslinked foam that is stretched and has a thickness of 3.0 mm
Got

The melting endothermic peak, density and gel fraction of the obtained olefin resin crosslinked foamed product were measured by the following methods,
The obtained results are shown in Table 1. Further, Table 2 shows the stretching ratio in the widening device.

(Melting endothermic peak) The melting endothermic peak of the foam was measured using a "differential thermal analyzer" manufactured by Seiko Instruments. (Density) The density of the foam was measured using an electronic hydrometer “ED20T” manufactured by Mirage. (Gel Fraction) An olefin-based crosslinked foam was weighed and immersed in xylene at 120 ° C. for 24 hours.
After filtering with a wire mesh of 00 mesh, the insoluble matter on the wire mesh was vacuum dried, and the weight (Bg) at that time was measured and calculated by the following method. Gel fraction (%) = (B / A) × 100

(Stretching ratio) The lengths in the longitudinal and transverse directions before and after widening were measured and calculated by the following method. Stretching ratio = length before widening (m) / length after widening (m) As an olefin resin sheet, the melting endothermic peak by differential thermal analysis is 160 ° C., and the bending elastic modulus is 1.5 × 10 ⁵ k.
Pa, MI 1.0 g / 10 min and density 0.90 g /
The olefinic thermoplastic elastomer having a volume of ³ cm ³ was supplied to a uniaxial extruder and extruded at a resin temperature of 190 ° C. with a thickness of 200 μm by a T-die method, and then heat-sealed with the above-mentioned foam to form an olefin resin sheet and a foam And a laminated sheet was obtained. The thickness of the olefin resin sheet extruded from the T-die was measured and shown in Table 1, and the line speed during lamination was measured and shown in Table 2. Further, the elongation at 120 ° C. and 140 ° C. of the obtained laminated sheet was measured, and the obtained results are shown in Table 3. The elongation at 140 ° C is JIS
It was measured based on K 6767. A laminated material was obtained in which a soft vinyl chloride sheet having a thickness of 0.50 mm was attached to the foamed side of the obtained laminated sheet by using a polyester adhesive.

(Evaluation of Stamping Formability) The above laminated material was formed into a plane square shape of 150 mm × 150 mm, and then placed horizontally between the upper die and the lower die so that the skin material was placed on the upper die side. Placed on the lower mold, MI of 30g / 10
10 minutes each of propylene-based resin having a temperature of 200 ° C. is supplied from two gates, and immediately the upper die is pressed toward the lower die at a pressure of 5000 kPa for 5 seconds using a hydraulic press kept at 20 ° C. 5 at a pressure of 1000 kPa
The upper die and the lower die were pressed against each other for 0 seconds and water was passed through the hydraulic press to cool the laminated material, and then the upper die was moved upward to release the pressure to the laminated material. The unevenness of the skin material of the obtained molded product was visually observed, and the breakage at the corner is shown in Table 2. Further, the obtained molded product was subjected to a sensory evaluation of flexibility, and is shown in Table 3. Surface irregularity ○: No irregularities or wrinkles were found on the surface, and the appearance was good. X: The surface had irregularities and wrinkles, and the appearance was poor. Corner breakage ○: No breakage was observed in the corner, and the appearance of the corner was good. X: The corner portion was torn, and the appearance of the corner portion was poor. Flexibility: Good flexibility. X: The flexibility was insufficient.

Comparative Examples 1 to 4 In the formulation of the foamable resin composition sheet of the olefin resin crosslinked foam in Example 1, the same resin, crosslinking aid and thermal decomposition type foaming agent as in Example 1 were used. And show each ratio as shown in Table 4,
An olefin resin crosslinked foam was obtained. Extrusion, irradiation and foaming were carried out in the same manner as in Example 1 to obtain an olefin resin crosslinked foam having a thickness of 3 mm. Example 1 of the obtained foam
Evaluation and measurement were performed in the same manner as in, and the results are shown in Tables 1 and 2. An olefin resin sheet similar to that of Example 1 was fused to the obtained olefin resin crosslinked foam to obtain a laminated sheet of the olefin resin sheet and the foam. The obtained olefin resin sheet was evaluated and measured in the same manner as in Example 1, and the results are shown in Tables 1, 2 and 3. Further, the same skin as in Example 1 was attached to the above-mentioned laminated sheet, the stamping molding evaluation was performed, and the obtained results are shown in Table 3.
It was shown to.

(Comparative Examples 7 to 9) The stretching ratio of the olefin resin crosslinked foam obtained in Example 1 and the line speed during lamination of the olefin resin sheet obtained in Example 1 were changed as shown in Table 2. The same evaluation and measurement as in Example 1 were carried out except that the above was performed. The results obtained are shown in Table 3.

(Comparative Example 10) The resin of the olefin resin sheet of Example 1 had a melting endothermic peak of 1 by differential thermal analysis.
The same evaluation and measurement as in Example 1 were carried out except that high density polyethylene having a bending elastic modulus of 1.9 × 10 ⁶ kPa, MI of 5.0 and density of 0.97 g / cm ^{3 was used} at 40 ° C. The results obtained are shown in Tables 1, 2 and 3.

[0043]

[Table 1]

[0044]

[Table 2]

[0045]

[Table 3]

[0046]

[Table 4]

[0047]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned constitution, it can be molded into a complicated shape at high temperature, and a beautiful molded product having a complicated shape such as an automobile interior material can be obtained in a desired shape. In addition, the molded product obtained has excellent surface properties. In addition, since the flexibility at room temperature is excellent, the flexibility and feel of the molded product are also excellent.

Claims (3)

[Claims] 1. An olefin resin having at least one melting endothermic peak temperature of 148 ° C. or higher by differential thermal analysis and having a density of 0.025 to 0.040 g / cm ³ ,
An olefin resin sheet having a thickness of 80 to 200 μm and an apparent density of 0.60 to 0.92 g / cm ³ was laminated on at least one surface of the olefin resin crosslinked foam having a gel fraction of 20 to 50%. Laminated sheet, 120 ° C
And the elongation of the laminated sheet at 140 ° C. is 350% or more in the flow direction (hereinafter referred to as MD) and the width direction (hereinafter referred to as TD) of the laminated sheet. 2. The laminated sheet according to claim 1, wherein a skin material is attached to the non-laminated surface of the olefin resin sheet. 3. A molded product obtained by providing a thermoplastic resin base material on the olefin resin sheet side of the laminated sheet according to claim 1, and by a hot stamping molding method.