JPH08119318A - Polystyrene resin foam laminated sheet and its molded article - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a polystyrene-based resin foam laminated sheet and a molded product thereof, which can form a container having a high rib compression strength. [Structure] A high density foamed sheet having a density in the range of 0.7 g / cc to 0.13 g / cc and a thickness in the range of 0.2 mm to 1.5 mm, and a density of 0.081 g / cc to
The range is 0.042 g / cc and the thickness is 1.0 to 3.
A foam laminated sheet in which at least two layers of a low-density foam sheet having a range of 0 mm are laminated, and a foam-molded article having the high-density foam sheet side as an inner side. [Effect] Even with foamed sheets having the same thickness and density, in the case of the foamed sheet according to the present invention, a molded product having high rib compressive strength can be obtained, and as a result, material saving and low cost are required. It is possible to manufacture a molded product made of a polystyrene-based resin foam sheet having such strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polystyrene resin foam laminated sheet and a molded article thereof, more specifically, a polystyrene resin foam laminated sheet having a two-layer structure of at least a low density layer and a high density layer, And a molded article having the high density layer side as the inner surface.

[0002]

2. Description of the Related Art Conventionally, as a method for obtaining a polystyrene-based resin foam-molded article, a polystyrene-based resin foam sheet is heated in a molding machine to secondary foam to a softened state, molded by various molding methods, and punched. Has been done. In addition, various methods have been tried in order to obtain strength, which is one of the necessary functions of a molded product, such as increasing the thickness of the molded product, increasing the weight, and forming ribs on the molded product. Has been done.

That is, in many cases, a tray container or the like is filled with the contents in a container, wrapped with a film, and lined up in a store in the state of being wrapped. In such a method of using a tray container, since a large compressive force is applied to the container, it is necessary for the container to have a compressive strength sufficient to withstand these forces and a function not to buckle easily. Also,
It is also necessary for the wrapped film to be able to hold the stretched wrapped state for a long period of time, and for that purpose it is also necessary to be able to withstand its compressive strength for a certain period of time or longer.

As one method of imparting such a function to a polystyrene-based resin foam-molded article while saving material,
It has been proposed that only the inside of the molded product has a high-density skin layer (see Japanese Utility Model Publication No. 63-6005). In a container such as a tray, when lapping is performed, a compressive stress is generated inside the boundary between the side wall and the bottom, while a tensile stress is spread outside in a wide range from the side wall to the bottom. Therefore, by forming a high-density skin layer only on the inner side of the molded product, it is intended to impart resistance to the extreme compressive stress generated on the inner surface.

[0005]

The above proposal is effective for imparting the necessary strength to the polystyrene resin foam molded article, but this method is achieved by blowing air on the surface of the foam sheet. Since a high-density skin layer is formed, the thickness of the high-density layer is limited to about 0.05 mm in consideration of moldability and the like, and this thickness is not always necessary to obtain the necessary compressive strength. Since it may not be sufficient, it is necessary to add ribs.

If a reinforcing rib is provided, it may not be possible to form a deep container due to its moldability. Also, when a tray or the like is formed, depending on the shape, the stacking height of molded products (for transporting the container, However, the bulkiness when superposed) cannot be lowered, which causes a problem of bulkiness. The present invention is intended to solve the above-mentioned disadvantages of conventional polystyrene-based resin foamed sheets and molded products thereof, and more specifically, polystyrene-based resins having the same thickness and the same density as the entire sheet. Although it is a molded product molded using a foamed sheet, it is possible to obtain a molded product having higher strength (particularly rib compression strength), and thus a polystyrene-based material that enables material saving and low cost. It is intended to obtain a resin foam sheet and a molded product thereof.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present inventors have conducted many experiments and studies on a polystyrene-based resin foam sheet and a molded article thereof,
Basically, a polystyrene resin foam sheet is manufactured as a two-layer structure of at least a high-density foam sheet layer and a low-density foam sheet layer, and a molded article such as a container with the high-density foam sheet layer side of the laminated sheet inside By molding, it was perceived that the above object could be achieved, and further experiments were carried out to reach the present invention.

That is, the present invention is a polystyrene resin foam sheet having a density of 0.7 g / cc to 0.13.
It is in the range of g / cc, and the thickness is 0.2 mm to 1.5 mm.
High density foam sheet with a range of 0.081g and density
/ Cc to 0.042 g / cc, and the thickness is 1.
Disclosed is a foam laminated sheet characterized in that at least two layers of a low density foam sheet having a range of 0 to 3.0 mm are laminated.

At least one layer of resin film may be laminated on at least one surface of the foam laminated sheet. The present invention is also a molded article using the foamed laminated sheet, wherein the high-density foamed sheet is the inside of the molded article, and preferably, the high-density foamed portion at the boundary portion between the side wall portion and the bottom portion of the molded article. The thickness of the foam sheet is 0.2 mm to 3.
Also disclosed is a molded article intended to be in the 0 mm range.

The method for producing the foamed laminated sheet of the present invention is not particularly limited, and a conventionally known method for producing a foamed laminated sheet such as a coextrusion method, a laminating method using an adhesive layer, or a fusion method using heat is used. Can be appropriately used, but the coextrusion method is preferable in terms of cost and workability. In addition, when using a circular die by the coextrusion method,
It is preferable to extrude the high-density foamed sheet inside (plug side) and the low-density foamed sheet outside.
This is because when the low-density foamed sheet is placed inside, it may be crushed by the plug, making it difficult to adjust the thickness and density of the sheet.

Further, air may be blown onto the surface of the high-density foamed sheet and / or the low-density foamed sheet to form a skin on the surface of the foamed sheet. In this case, preferably, high density foam on the sheet side 5 ° C. to 45 ° C. only 1 m ² per 0.04m ³ ~0.4m ³ spray of air foamed sheet (air ring inlet air temperature), low-density side 5 ℃
~45 ℃ of 1m ² per 0.02m of the air foam sheet
³ so that ~0.3m ³ blown. When the foamed sheet is extruded in a single layer and laminated after extruding, one sheet and / or both sides of each sheet may be blown with air in the same manner to be laminated with a skin.

By forming the surface skin in this way, effects such as a clean appearance, improved printability, and improved rib strength are brought about. The foamed laminated sheet of the present invention achieves the intended purpose as long as it has a two-layer structure of at least the high-density foamed sheet and the low-density foamed sheet described above, but is not limited to this, and may have a multi-layered structure. Alternatively, it may have a structure in which films are further laminated. As the multilayer structure, for example,
High density foam sheet / low density foam sheet / HIPS film / high density foam sheet / low density foam sheet combination, high density foam sheet / low density foam sheet / OPS film combination, HIPS film / high density foam sheet / low density A combination of a foamed sheet / HIPS film may be used. By doing so, effects such as improvement in compressive strength are brought about.

In particular, laminating the film on the high-density sheet side is also effective in preventing the seat refraction occurring at the boundary between the side wall and the bottom inside the tray container due to the compressive force when the tray container is used. Act on. Further, it is particularly effective to bond the film to the low density sheet side when printing on the surface of the laminated sheet. Furthermore, it can also fulfill the function of suppressing the elongation of the entire skin layer against tensile stress.

The film to be used is optional as long as it has the physical properties of being stretched by heat molding, but as the resin for the film, styrene, methylstyrene, ethylstyrene, isopropylstyrene, dimethylstyrene, paramethylstyrene, chlorostyrene, Homopolymer or copolymer of bromostyrene, vinyltoluene, vinylxylene, for example, as a resin, styrene-maleic anhydride copolymer, styrene / acrylic acid copolymer, high impact polystyrene, styrene / acrylonitrile resin, acrylonitrile / Butadiene-styrene resin can be used. Particularly, polystyrene resin and high impact polystyrene resin are preferable. In addition, a mixture of polystyrene-based resin and high-impact polystyrene is used, or high-impact polystyrene is used alone, and the high-impact polystyrene has a styrene-butadiene copolymer dispersed in a salami structure and has a particle size of 0. ．
It is possible to cite those containing a large amount of 3 μm to 10 μm. In addition, linear low-density polyethylene, high-density polyethylene, low-density polyethylene, propylene homopolymer, ethylene-propylene random polymer, ethylene-propylene block polymer, ethylene-propylene-butene-terpolymer, ethylene-vinyl acetate copolymer , Ethylene-unsaturated carboxylic acid ester copolymer (for example, ethylene-methyl methacrylate copolymer), ethylene-unsaturated carboxylic acid metal salt copolymer (for example, ethylene-magnesium acrylate (or zinc))
Copolymer), propylene-vinyl chloride copolymer, propylene-butene copolymer, propylene-maleic anhydride copolymer, propylene-olefin copolymer (propylene-ethylene copolymer, propylene-butene-1 copolymer) polyethylene or polypropylene Unsaturated carboxylic acid (for example, maleic anhydride) modified product, ethylene-
Propylene rubber, atactic polypropylene and the like, polyethylene, ethylene-propylene copolymer,
Examples thereof include a propylene-butene-1 copolymer, a mixture of two or more kinds thereof, and films such as polyethylene terephthalate and polybutylene terephthalate.

It is also a preferable embodiment to laminate a film having a gas barrier property, and examples of the gas barrier film include an ethylene / vinyl acetate copolymer, polyvinyl alcohol, polyvinylidene chloride, polyamide, polyester, polyacrylonitrile and vinylidene chloride. system·
Acrylonitrile copolymer, acrylonitrile-based methylmethacrylate / butadiene copolymer, nylon, biaxially oriented nylon, biaxially oriented polyethylene terephthalate, biaxially oriented polypropylene, high density polyethylene, ionomer resin (for example, registered trademark Surlyn), or A single metal vapor deposition film or a laminate of these films is used.

In the present invention, in the case of laminating a foamed sheet and a film, a laminating method using heat can be used in addition to the coextrusion method. At that time, the film is thermocompression-bonded from the side opposite to the bonding surface with a heat roll. In this case, the surface of the roll to be heat-pressed is subjected to chrome plating or Teflon coating to prevent stickiness with the heated film. Further, the joint surface may be heated by a heating device together with the thermocompression bonding using a hot roll.

Further, an adhesive or an adhesive layer may be used to bond the foamed sheets or the foamed sheets to the film. The adhesive is preferably an adhesive such as ethylene-vinyl acetate copolymer, methyl methacrylate polymer elastomer (Tufrene, Tuftec: Asahi Kasei Co., Ltd.), and the thickness thereof is about 5 μm to 150 μm. .

The high density foamed sheet inside the container has a density of 0.
7 g / cc to 0.13 g / cc with a thickness of 0.2 m
The thing of m-1.5 mm is used. When the density of the high-density foamed sheet exceeds 0.7 g / cc, it becomes almost like a film, and when compressive stress is applied to the inner surface of the container, the foamed sheet easily breaks at the poles, causing bubbles on the low-density foamed sheet side to buckle. The bending strength is reduced. Also, the density is 0.13g
If less than / cc, the density of the molded product after molding is 0.07
Since g / cc is exceeded, the effect of preventing the buckling of the poles of the molded product is reduced.

If the thickness of the high-density foamed sheet is less than 0.2 mm, the thickness of the boundary between the side wall and the bottom of the molded product may be stretched to less than 0.2 mm at the time of forming, and the buckling prevention effect may be obtained. Is reduced. According to the experiments conducted by the present inventors, when the density is 0.17 g / cc or less, the buckling prevention effect is particularly exhibited when the thickness of the boundary portion between the side wall portion and the bottom portion of the molded product is extended during molding. It wasn't good. Also, the thickness is 1.5m
Even if it exceeds m, the buckling prevention effect does not increase and the cost rises, so that the economic merit is lost.

The low density foamed sheet outside the container has a density of 0.
081 g / cc to 0.042 g / cc and a thickness of 1.0 to
The one with 3.0 mm is used. If the density of the low-density foamed sheet exceeds 0.081 g / cc, the bending strength of the molded product after molding will not be increased, and the tensile strength will be more than necessary to overcome the tensile stress and the economical efficiency will be reduced. Further, when combined with a high-density foamed sheet, it can be obtained only with the same bending strength as a general PSP (single-layer sheet). Density is 0.04
If the amount is less than 2 g / cc, the number of air bubbles is increased, and the elongation during molding is poor and cracks occur. Further, because of the communication of air bubbles, the strength of the molded product is weakened, and partial heating unevenness is likely to occur during heating in the molding machine, and the range of molding conditions is narrowed.

When the thickness of the low-density foamed sheet is less than 1.0 mm, the strength is insufficient when the container is formed by combining with the high-density foamed sheet. That is, the bending strength is the same as that of the general PSP, and the merit is small. In addition, the thickness 3.
If it exceeds 0 mm, even if it is combined with a high-density foamed sheet to form a container, only bending strength equivalent to that of a general PSP is obtained, and there is little merit.

[0022]

The present invention will be described below with reference to examples. [Example 1] Melt index (hereinafter referred to as MI)
4.1 (Catalog value) polystyrene resin (trade name Denkastyrol HRM-5: Denki Kagaku Kogyo Co., Ltd.) 10
0.8 parts by weight of talc powder having a diameter of 5 to 15 μm was added to 0 parts by weight as a cell adjuster, and this was added to a batch type continuous mixing device on a hopper of an extruder having an inner diameter of 90 mm and uniformly mixed, and then hopper. It was supplied to the extruder. The maximum cylinder temperature of the extruder was 230 ° C, butane gas (i-butane 65%, n-butane 35%) was used as a foaming agent.
Was added to the merging die at a rate of 76 kg / Hr.

On the other hand, 100 parts by weight of polystyrene resin having MI = 1.9 (catalog value) (trade name: Denka Styrol HRM-2: Denki Kagaku Kogyo Co., Ltd.) was used as a bubble control agent and 5 to 15 μm of talc powder 0.8. Parts by Weight and Trade Name Hydrocerol CF-40S (Dainippon Seika Kogyo Co., Ltd.)
0.6 part by weight was added, and the inner diameter was 90 mm-150 m.
Into a batch type continuous mixing device on a hopper of a 90 mm extruder of the m.m. extruder, the mixture was uniformly mixed and supplied to the extruder from the hopper. Maximum cylinder temperature of extruder is 2
Butane gas (i-butane 60)
%, N-butane 40%) to about 6.5% by weight,
It flowed into the merge die at a rate of g / Hr.

The two kinds of resin mixed together by the combining die are flowed into a mold having a diameter of 126 mm, and immediately after being extruded into a cylindrical shape through a slit, air is blown inside and outside the balloon to cool the foamed sheet. did. Air temperature is 27 ℃
, And the amount sprayed, the inside of the high density foam sheet side 0.10 m ³ / m ^2, the outside of the low-density foam sheet side was 0.07m ³ / m ^2.

This foam laminated sheet is a high density foam sheet having a thickness of about 0.5 mm and a weight of 106 g / m ² (density 0.21).
2 g / cc), and the low-density foam sheet has a thickness of about 1.9.
mm, weighing 104 g / m ² (density 0.055 g / cc)
Met. That is, the total thickness of the foam sheet is 2.4 mm.
And the basis weight was 210 g / m ² . The thickness of the sheet was measured with a micrograph, and the basis weight was measured by taking 10 1 cm squares from the foamed sheet and dividing them into high density and low density with a razor. The density was calculated from the basis weight and the thickness.

This foamed laminated sheet stock was measured to have a size of 195
(Length) × 120 (width) × 25 (depth) mm using a mold, single-shot molding machine (Sekisui Plastics industrial specifications), oven temperature about 280 ℃ ~ 350 ℃, mold clamping time about 3.5 seconds It was molded in. Thickness (mm) of the side, bottom and boundary of the molded product
Was measured with a micrograph. Also, the rib compression strength is A
Using a load measuring machine Model 1310DS manufactured by IKOH ENGINEERING, the repulsive force when the molded container was compressed by 10 mm (400 mm / min) was measured. The measured values are shown in Table 1.

[Examples 2 to 4 and Comparative Examples 1 to 7] Foamed laminated sheets were obtained in the same manner as in Example 1, and molded with the same molding die size as in Example 1 and evaluated by the same molding machine. At that time,
The total thickness of the foamed laminated sheet and the weight as a whole are substantially the same as those in Example 1, and the thickness and basis weight of each of the high-density foamed sheet and the low-density foamed sheet are adjusted by adjusting the discharge rate of the extruder. To make it different. However, Example 2
The low-density side of the resin used was a resin obtained by re-pelletizing a used tray on the market (MI = 6.7). Further, Comparative Example 7 is a case where a low-density foamed sheet has a single-layer structure.

Each value was measured in the same manner as in Example 1 for each. The measured values are shown in Table 1 together with the values of Example 1.
Shown in Looking at Examples 1 to 4 and Comparative Examples 1 to 7, the thickness as a foamed sheet and the weighing (hence, the density)
Are almost the same, but those of the comparative example, that is, those which do not satisfy any one or more of the above-mentioned respective conditions of the foamed laminated sheet of the present invention, all have the rib compressive strength of the example. It shows a value lower than that, indicating the superiority of the present invention.

Particularly, in Comparative Example 1, the thickness of the high-density foamed sheet was too thin, so that the thickness of the boundary portion between the side portion and the bottom portion of the molded product was reduced, and buckling also occurred. In Comparative Example 2, since the high-density foamed sheet was thin and had a high density, the strength also decreased and buckling occurred. In Comparative Example 4, since the density of the low-density foamed sheet was too small, the communication of air bubbles was large and the rib strength was significantly reduced.

[0030]

[Table 1]

[Examples 5 to 7 and Comparative Examples 8 to 10] In the same manner as in Example 1, foamed laminated sheets were obtained. At that time, similarly, the thickness and basis weight of each of the high-density foamed sheet and the low-density foamed sheet were made different by adjusting the discharge rate of the extruder. However, the total thickness of the foam laminated sheet should be in the same range of 3.1 mm to 3.5 mm,
The total weight is 301 g / m ^{2 to} 308 g /
The range of m ² was almost the same. Comparative Example 10 has a single-layer structure of a low-density foam sheet.

Using these original fabrics, the size 162 (length)
A box-shaped container of × 132 (width) × 54 (depth) mm was molded in the same manner as in Example 1, and each value was measured and evaluated in the same manner as in Example 1 for each. The results are shown in Table 2. As can be seen from Examples 5 to 7 and Comparative Examples 8 to 10, even in this case, the thickness and the weight (hence, the density) of the foamed sheet are almost the same, but the rib compression strength of each of the comparative examples is almost the same. The value is lower than that of the example, which shows the superiority of the present invention. Particularly, in Comparative Example 8, the bending strength was the same as the bending strength of the general PSP because the low-density foam sheet was too thick.
Moreover, the mold was not well-defined and the growth was insufficient.

[Examples 8 to 10 and Comparative Examples 11 to 12] Foam laminated sheets were obtained in the same manner as in Example 1. Also in this case, the thickness and basis weight of the high density foamed sheet and the low density foamed sheet were made different by adjusting the discharge rate of the extruder. The total thickness of the foam laminated sheet was 2.15 mm to 2.4 mm in substantially the same range, and the total basis weight was 210 g / m ^{2 to} 214 g / m ^{2 in} the substantially same range. In addition, in Example 8, an OPS film (100 μm thick) was laminated on the high-density foamed sheet side by a hot roll.

In Example 9, a HIPS film (100 μm thick) was laminated on the low density foam sheet side by an extrusion method. In Example 10, Sumilite CEL (manufactured by Sumitomo Bakelite Co., Ltd.) (80 μm thick), which is a commercially available barrier film, was laminated on the high-density foamed sheet side by a hot roll.

In Comparative Examples 11 and 12, a HIPS film (about 100 μm) was laminated on the low density foam sheet side by an extrusion method. Using these stocks, size 1
A box-shaped container of 62 (length) × 132 (width) × 54 (depth) mm was molded in the same manner as in Example 1, and each value was measured and evaluated in the same manner as in Example 1 for each. . The results are shown in Table 2.

Looking at Examples 8 to 10 and Comparative Examples 11 to 12, in this case as well, although the thickness and the weight (hence, the density) of the foamed sheet are almost the same, all of the Comparative Examples have ribs. The compressive strength shows a lower value than that of the examples, again demonstrating the superiority of the present invention. Particularly, in Comparative Example 11, as in the case of Comparative Example 2, since the high-density foamed sheet was thin and had a high density, the strength also decreased and the bubbles on the low-density foamed sheet side buckled, causing buckling. . In addition, in Examples 8 to 10, since the films were laminated, the molded products having the same dimensions as those of Examples 5 to 7 showed high rib compressive strength.

Example 11 Heat-resistant polystyrene resin with MI = 4.1 (trade name Asahi Kasei Polystyrene G9001: Asahi Kasei Corporation) 95 parts by weight: Elastomer resin with MI = 13 (trade name Tuffprene A: Asahi Kasei Corporation) To 5 parts by weight, 0.6 parts by weight of talc powder having a particle size of 5 to 15 μm as a cell adjuster was added to 100 parts by weight of the resin, and this was supplied to an extruder having an inner diameter of 90 mm in the same manner as in Example 1. The extruder cylinder temperature was set to a maximum setting temperature of 265 ° C, and butane gas (i-butane 35%, n-
Butane 65%) was added to about 3.1% by weight to obtain 76 kg / Hr.
It flowed into the merge die at a rate of.

On the other hand, a heat-resistant styrene resin having MI = 1.4 (trade name: Asahi Kasei Polystyrene G9001: Asahi Kasei Kogyo Co., Ltd.) was used as a cell regulator in an amount of 5 to 1 with respect to 100 parts by weight.
0.8 parts by weight of 5 μm talc powder and 20 parts of tuckle powder
Parts by weight and 5 parts by weight of calcium stearate and 2 parts by weight of a masterbatch of impact resistant resin,
This was supplied to an extruder having an inner diameter of 90 mm to 150 mm in the same manner as in Example 1.

The maximum cylinder temperature of the extruder is 2
75 ° C., butane gas (i-butane 65
%, N-butane 35%) was added by a separate diaphragm type high pressure pump in an amount of about 6.1% by weight, and the mixture was flown into the merging die at a rate of 78 kg / Hr. The two kinds of resin mixed together by the combining die were flown into a mold having a diameter of 120 mm, and immediately after being extruded into a cylindrical shape from a slit, air was blown inside and outside the balloon to cool the foamed sheet. Air temperature was 31 ° C., the amount sprayed is, 0.12 m ³ / m ² on the inside of the high density foam sheet side, the outside of the low-density foam sheet side was 0.08m ³ / m ^2.

This foamed sheet is a high-density foamed sheet having a thickness of about 0.8 mm and a basis weight of 112 g / m ² (density of 0.14 g /
cc), the low-density foam sheet has a thickness of about 1.6 mm,
The basis weight was 101 g / m ² (density 0.063 g / cc). That is, the total thickness of the foamed sheet was 2.4 mm, and the basis weight was 213 g / m ² . Asahi Kasei Polystyrene G with MI = 1.4 on the high-density side of this two-layer foam sheet
9001 and Toughprene A (MI = 13) were mixed in a ratio of 9: 1 and pelletized resin was used, and the maximum cylinder temperature was 280 ° C. with a 90 mm extruder, and about 100 μm using a T-die.
Film was extrusion laminated.

Using this laminate original fabric, the dimensions 162 (length) × 132 (width) are set so that the high density side is on the inside.
A box-shaped container having a size of × 54 (depth) mm was formed. Molding was performed at a molding temperature of about 300 to 380 ° C. and a mold clamping time of 4.9 seconds. In the same manner as in Example 1, the thickness of the side part, the bottom part, and the boundary part of the molded product was measured by a micrograph. Also,
The rib compressive strength was measured. The values are shown in Table 2.

In this case, since the film was attached to the low density side in Example 9, the increase in the force against the local compressive stress generated on the inner surface of the container was small, and the laminated barrier film used in Example 10 was Because of being softer than the film of Example 11, the molded product has the same dimensions, but shows higher rib compressive strength than those of Examples 9 to 10.

[0043]

[Table 2]

[0044]

EFFECT OF THE INVENTION By using the polystyrene-based resin foamed laminated sheet according to the present invention, a molding having a high rib compression strength can be obtained even when the laminated sheet having the same thickness and the same density as the conventional polystyrene-based resin foamed sheet is formed. You can get the goods. As a result, it becomes possible to manufacture a molded product made of a polystyrene-based resin foam sheet having a required strength with a material saving and a low cost.

Claims (4)

[Claims] 1. A high density foamed sheet of polystyrene resin, which has a density of 0.7 g / cc to 0.13 g / cc and a thickness of 0.2 mm to 1.5 mm. , Density is 0.081 g / cc to 0.04
A foamed laminated sheet, wherein at least two layers of a low-density foamed sheet having a range of 2 g / cc and a thickness of 1.0 to 3.0 mm are laminated. 2. The foam laminated sheet according to claim 1, wherein at least one layer of a resin film is laminated on at least one surface of the foam laminated sheet according to claim 1. 3. A molded product using the foamed laminated sheet according to claim 1 or 2, wherein the high density foamed sheet is inside the molded product. 4. A molded product using the foamed laminated sheet according to claim 1 or 2, wherein the high density foamed sheet is inside the molded product, and the height at a boundary portion between a side wall portion and a bottom portion of the molded product is high. The thickness of the density foam sheet is 0.2 mm to 3.0
Molded product designed to be in the mm range.