JPH08230082A - Unsaturated polyester resin lamainate - Google Patents

Abstract

PURPOSE: To provide an unsaturated polyester resin lamainate excellent in lightweight properties, dimensional stability and deep drawing processability. CONSTITUTION: An unsaturated polyester resin SMC 2 is integrally laminated to both surfaces of corrugated cardboard 1 to produce an unsaturated polyester resin laminate. Strength is held by the cured layer of the unsaturated polyester resin SMC 2 and it is unnecessary to reinforce the corrugated cardboard by a metal plate and dimensional stability is high as compared with a case using a thermoplastic resin. The draw processing applied at the time of laminate molding is fixed by the curing of the unsaturated polyester resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unsaturated polyester resin laminate having a cardboard as a core material.

[0002]

2. Description of the Related Art For example, Japanese Patent Publication No. 6-94195 discloses a laminated body having a corrugated cardboard as a core material for automobile parts such as automobile interior materials and interior materials for buildings. However, the one disclosed in Japanese Patent Publication No. 6-94195 has a problem in lightness because it is formed by stacking a metal plate such as an aluminum plate on a cardboard.

For this reason, as shown in FIG. 15, the polyethylene film 1 is formed on each side of the core 11 of the cardboard.
A composite cardboard B having a liner paper 12 attached thereto is provided.

[0004]

The problem shown in FIG. 15 is as follows.
It can be formed lightweight because it does not have metal plates laminated, but since it is a laminate of paper and a thermoplastic resin such as polyethylene, there is a problem with dimensional stability against the action of heat and moisture, In addition, there is a problem that springback tends to occur even when drawing is performed, and it is difficult to draw deeply.

The present invention has been made in view of the above points, and an object of the present invention is to provide an unsaturated polyester resin laminate excellent in lightness, dimensional stability, deep drawing workability and the like. .

[0006]

The unsaturated polyester resin laminate according to claim 1 of the present invention is characterized in that the unsaturated polyester resin SMC2 is laminated and integrated on both sides of the cardboard 1. In the unsaturated polyester resin laminate according to claim 2, the unsaturated polyester resin SMC2 is laminated on one surface of the cardboard 1, and the paper 3 is laminated on one surface of the unsaturated polyester resin SMC2 on the other surface of the cardboard 1. The above SMC-impregnated paper 4 is laminated and integrated so that the paper 3 is on the outside.

In the unsaturated polyester resin laminate according to the third aspect, the thermoplastic resin film 5 is formed on one surface of the cardboard 1 and one surface of the unsaturated polyester resin SMC2.
SMC-impregnated paper 6 with a thermoplastic resin film obtained by laminating paper 3 laminated with
And the SMC-impregnated paper 4 in which the paper 3 is laminated on one side of the unsaturated polyester resin SMC2 on the other surface of the corrugated cardboard 1 so that the paper 3 is on the outside. It is characterized by consisting of.

Further, in the unsaturated polyester resin laminate according to a fourth aspect, the thermoplastic resin film 5 is formed on one surface of the cardboard 1 and one surface of the unsaturated polyester resin SMC2.
SMC-impregnated paper 6 with a thermoplastic resin film obtained by laminating paper 3 laminated with
And the unsaturated polyester resin SMC2 are laminated and integrated on the other surface of the cardboard 1.

In the present invention, the cardboard 1 may be a single-sided cardboard 1a or a double-sided cardboard 1b. Further, in the present invention, the weight per unit area of the unsaturated polyester resin SMC2 is preferably 50 to 500 g / m ² . Hereinafter, the present invention will be described in detail.

The cardboard 1 is formed by adhering a liner paper 12 to a corrugated core 11 with a starch adhesive, a water resistant adhesive, or the like, and is made of any paper such as kraft paper for cardboard. Although it can be used, it is preferable to use one made of paper having a basis weight of 50 to 300 g / m ² , and particularly preferable to use one made of flame-retardant paper or non-combustible paper. As the cardboard 1, a single-sided cardboard 1a in which a liner paper 12 is adhered to one side of a core 11 or a double-sided cardboard 1b in which a liner paper 12 is adhered to both sides of the core 11 can be used and has a thickness of 1.5 m.
It is preferably m to 6 mm. Further, it is also possible to use one formed by adhering this to a plurality of layers.

On the other hand, unsaturated polyester resin SMC (S
heat Molding Compound 2)
It can be produced by a known method using the unsaturated polyester resin 16 and the glass fiber 20. FIG. 10 shows an example thereof, and while continuously delivering the long release film 14a from the film roll 15a substantially horizontally,
The unsaturated polyester resin 16 is supplied onto the release film 14a, the unsaturated polyester resin 16 is applied to the release film 14a by a doctor 17a so that the release film 14a has a constant thickness, and above the release film 14a. The long release film 14b is attached to the film roll 1
5b, the unsaturated polyester resin 16 is supplied onto the release film 14b continuously while being sent out substantially horizontally, and the unsaturated polyester resin 16 is applied to the release film 14b by a doctor 17b so as to have a constant thickness. To do. The chopped glass fibers 20 obtained by cutting the glass roving 18 with the cutter 19 are used as the lower release film 1
After spraying on the unsaturated polyester resin 16 applied to 4a, the unsaturated polyester resin 16 of the upper release film 14b is overlaid thereon, and the glass fiber 20 is sandwiched between the unsaturated polyester resins 16, The unsaturated polyester resin SMC2 having the structure shown in FIG. 11 can be obtained by, for example, heating in an impregnation zone 21 and then winding it up on a winding roll 22. The unsaturated polyester resin 16 may be applied to both the upper and lower release films 14a and 14b as shown in FIG. 10, but may be applied only to the lower release film 14a.

Here, as the release films 14a and 14b, resin films having a thickness of 10 to 60 μm such as polypropylene, polyethylene, polyethylene terephthalate can be used. Also, unsaturated polyester resin 16
Can be a compound containing an unsaturated polyester resin as a main component and, if necessary, a release agent, a catalyst, a filler, a thickener, and the like. Further, as the glass fiber 20, it is preferable to use one having a fiber length of 6 to 50 mm. The unsaturated polyester resin 16 is blended with the unsaturated polyester resin 16 at a ratio of 10 to 60% by weight.
It is preferable to make MC2. The weight of the unsaturated polyester resin SMC2 is 50 to 50.
It is preferable to make it in the range of 0 g / m ² .
When the unsaturated polyester resin SMC2 is laminated and formed on the cardboard 1 and the skin material 24 as described below, the weight of the unsaturated polyester resin SMC2 needs to be 50 g / m ² or more in order to obtain high adhesive strength. The weight of the unsaturated polyester resin SMC2 is required to be 500 g / m ² or less in order to achieve the effect of reducing the weight.

FIG. 1 (a) shows an example of the unsaturated polyester resin laminate A of the present invention. The unsaturated polyester resin SMC2 is heated at a temperature of 50.degree. The release films 14a, 14b on one side of the polyester resin SMC2 are peeled off and cut into a predetermined size, and two unsaturated polyester resins SMC2, 2 are attached on one side of the cardboard 1a on the side on which the release films 14a, 14b are removed. Of the unsaturated polyester resin SMC2 laminated on both sides of the single-sided cardboard 1a by laminating and curing the unsaturated polyester resin 16 by heat-pressing and molding in the mold. The resin laminated body A can be manufactured.

Here, 2 to be laminated on the single-sided cardboard 1a
Release film 1 on both sides of one unsaturated polyester resin SMC2 of the sheets of unsaturated polyester resin SMC2
4a and 14b are peeled off, and this unsaturated polyester resin S
By laminating the inner surface of the MC 2 on the single-sided cardboard 1a and the outer material 24 on the outer surface, and heating and pressurizing in this state in the mold, as shown in FIG. 1 (b),
At the same time when the unsaturated polyester resin laminate A is molded, the skin material 24 can be attached to the surface of the unsaturated polyester resin laminate A by the self-adhesiveness of the unsaturated polyester resin SMC2. The skin material 24 is for making up the surface of the unsaturated polyester resin laminate A, and for example, vinyl chloride resin leather, non-woven fabric of synthetic fiber or natural fiber, etc. can be used.

In the unsaturated polyester resin laminate A produced as described above, when the unsaturated polyester resin laminate A is drawn by forming a curved surface upon molding in a mold, the unsaturated polyester resin laminate A is formed. Due to the curing of 16, the unsaturated polyester resin laminate A is fixed to the drawn shape in this mold, and the deep draw processing is performed without causing springback as in the case of the thermoplastic resin. It will be possible. Moreover, the cured layer of the unsaturated polyester resin SMC2 has high rigidity, and the unsaturated polyester resin laminate A having excellent strength can be obtained.
The hardened layer of C2 has a smaller dimensional change with respect to heat and moisture than a thermoplastic resin, and is hard to burn, and is also excellent in dimensional stability and flame retardancy.

The unsaturated polyester resin laminate A shown in FIGS. 2 (a) and 2 (b) is an example in which a double-sided cardboard 1b is used as the cardboard 1, and other configurations are shown in FIG. 1 (a) ( Same as b). SMC-impregnated paper 4 is made of unsaturated polyester resin SMC2 and paper 3
It is manufactured by stacking. For example, as shown in FIG. 12, the long release film 14 is continuously fed out substantially horizontally from the film roll 15, and the release film 14 is continuously fed.
Unsaturated polyester resin 16 is supplied on top of the mold, and a release film 14 is formed by a doctor 17 so as to have a constant thickness.
Unsaturated polyester resin 16 is applied to, and chopped glass fibers 20 obtained by cutting glass roving 18 with a cutter 19 are sprinkled onto this unsaturated polyester resin 16, and then long paper 3 is placed above release film 14. While being continuously sent out substantially horizontally from the paper roll 25, it is superposed on the unsaturated polyester resin 16, and this is impregnated into the impregnation zone 2.
The SMC-impregnated paper having a structure as shown in FIG. 13 in which the paper 3 is laminated on one side of the unsaturated polyester resin SMC2 in a state of being impregnated with the unsaturated polyester resin 16 by being heated by 1 and wound on a winding roll 22. 4 can be obtained. As the release film 14, the unsaturated polyester resin 16, and the glass fiber 20, the above-mentioned materials can be used, and as the paper 3, kraft paper or the like can be used.

FIG. 3 (a) shows an example of the unsaturated polyester resin laminate A of the present invention. The unsaturated polyester resin SMC2 or SMC-impregnated paper 4 is heated at a temperature of 50 ° C. or lower to increase the viscosity. Then, one of the release films 14a and 14b of the unsaturated polyester resin SMC2 is peeled off, the release film 14 of the SMC-impregnated paper 4 is peeled off and cut into a predetermined size, and the surface of the peeled side is unsaturated polyester resin. The SMC 2 is on the surface of the liner paper 12 of the single-sided cardboard 1a, and the SMC-impregnated paper 4 is on the core 1.
1 and the unsaturated polyester resin 16 is cured by heating and pressurizing in the mold to cure the unsaturated polyester resin S on the single-sided cardboard 1a.
The unsaturated polyester resin laminate A in which the hardened layer of MC2 and the hardened layer of SMC-impregnated paper 4 are laminated and integrated can be manufactured. Even in this unsaturated polyester resin laminated body A, as shown in FIG. 3B, the skin material 24 can be simultaneously attached at the time of molding as in the case of FIG. 1B.

The unsaturated polyester resin laminate A shown in FIGS. 4 (a) and 4 (b) shows an example in which a double-sided cardboard 1b is used as the cardboard 1, and other configurations are shown in FIG. 3 (a) ( Same as b). The SMC-impregnated paper 6 with a thermoplastic resin film is an unsaturated polyester resin SM in which the thermoplastic resin film 5 is laminated on the paper 3 laminated with the thermoplastic resin film 5.
It is produced by stacking on C2. And FIG.
The SMC-impregnated paper 6 with the thermoplastic resin film can be produced by using the paper 3 laminated with the thermoplastic resin film 5 in place of the paper 3 in the above. It has a structure as shown in FIG. As the thermoplastic resin film 5, the temperature of the mold used when molding the unsaturated polyester resin laminate A (for example, 120
(° C.) or lower, which is made of a film such as an ethylene-vinyl acetate copolymer (EVA) or polyethylene (PE) that is softened at a temperature equal to or lower than that.

FIG. 5 (a) shows an example of the unsaturated polyester resin laminate A of the present invention. The SMC-impregnated paper 6 with a thermoplastic resin film and the SMC-impregnated paper 4 are heated at a temperature of 50 ° C. or lower. After the release film 14 is peeled off and cut into a predetermined size, the SMC-impregnated paper 6 with a thermoplastic resin film is attached to the surface of the liner paper 12 of the single-sided cardboard 1a on the surface of the peeled side to remove the SMC. Curing the SMC-impregnated paper 6 with the thermoplastic resin film on the single-sided cardboard 1a by stacking the impregnated paper 4 on the surface of the core 11 and heating and pressurizing in the mold to cure the unsaturated polyester resin 16 The unsaturated polyester resin laminate A in which the layers and the cured layer of the SMC-impregnated paper 4 are integrally laminated can be manufactured.

Even in this unsaturated polyester resin laminate A, as shown in FIG. 5B, the skin material 26 can be simultaneously attached at the time of molding as in the case of FIG. 1B. In this case, since the thermoplastic resin film 5 of the SMC-impregnated paper 6 with the thermoplastic resin film is softened when it is heated and pressed in the mold, the skin material 26 is self-adhesive by the thermoplastic resin film 5. It can be attached to the unsaturated polyester resin laminate A.

The unsaturated polyester resin laminate A shown in FIGS. 6 (a) and 6 (b) shows an example in which a double-sided cardboard 1b is used as the cardboard 1, and the other construction is shown in FIG. 5 (a) ( Same as b). Figure 7
(A) shows an example of the unsaturated polyester resin laminated body A of the present invention, and SMC with a thermoplastic resin film
Impregnated paper 6 and unsaturated polyester resin SMC2 5
After heating at a temperature of 0 ° C. or less to increase the viscosity, one of the release films 14a and 14b of the unsaturated polyester resin SMC2 is peeled off, and the release film 14 of the SMC-impregnated paper 6 with the thermoplastic resin film is peeled off and predetermined. SMC-impregnated paper 6 with a thermoplastic resin film is laminated on the surface of the liner paper 12 of the single-sided cardboard 1a, and the unsaturated polyester resin SMC2 is laminated on the surface of the core 11 on the side of the peeled side. The unsaturated polyester resin 16 is cured by heating and pressurizing in a mold, whereby a cured layer of the SMC-impregnated paper 6 with a thermoplastic resin film and a cured layer of the unsaturated polyester resin SMC2 are laminated and integrated on the single-sided cardboard 1a. The unsaturated polyester resin laminate A can be manufactured. Even in this unsaturated polyester resin laminate A, as shown in FIG.
As described above, as in the case of FIG. 6B, the skin material 26 can be simultaneously attached during molding.

The unsaturated polyester resin laminate A shown in FIGS. 8 (a) and 8 (b) shows an example in which a double-sided cardboard 1b is used as the cardboard 1, and other configurations are shown in FIG. 7 (a) ( Same as b). Incidentally, FIG.
As shown in (1), a plurality of cardboards 1 can be laminated via the unsaturated polyester resin SMC2 to produce the unsaturated polyester resin laminate A.

[0023]

EXAMPLES Next, the present invention will be explained by examples. (Example 1) 50% by weight of unsaturated polyester resin ("Polymer 5601" manufactured by Takeda Pharmaceutical Co., Ltd.), 5% by weight of styrene monomer, 2% by weight of polymerization initiator ("Trigonox 21LS50" manufactured by Kayaku Akzo Co., Ltd.), a filler (CaC
O ₃ ; “NS # 100” manufactured by Nitto Koka Co., Ltd.) 40% by weight, release agent (zinc stearate) 1% by weight, thickener (MgO;
An unsaturated polyester resin was prepared by blending 2% by weight of "Kyowamag 150" manufactured by Kyowa Chemical Industry Co., Ltd.

Using this unsaturated polyester resin, an unsaturated polyester resin SMC2 as shown in FIG. 11 containing glass fiber having a fiber length of 25 mm in an amount of 60% by weight and having a basis weight of 250 g / m ² was prepared. Then, with the configuration shown in FIG. 1B, the unsaturated polyester resin SMC2, the liner paper 12 having a basis weight of 100 g / m ² and the basis weight of 120 g
/ M ² of the core 11 made of 5 mm thick single-sided cardboard 1a, the basis weight of 150 g / m ² and the skin material 24 made of polyester non-woven fabric having a thickness of 1 mm are overlaid, respectively, and a pressing force of 5 kgf is applied by a mold at 120 ° C. / Cm ² ,
An unsaturated polyester resin laminate A was obtained by molding under the condition that the molding time was 60 seconds.

(Example 2) The same unsaturated polyester resin as in Example 1 was used to prepare 50 mm glass fibers having a fiber length of 50 mm.
FIG. 1 with a weight per unit area of 250 g / m ²
1. Make an unsaturated polyester resin SMC2 such as
The unsaturated polyester resin S containing the same unsaturated polyester resin as in Example 1 and having a fiber length of 25 mm in an amount of 50% by weight and having a basis weight of 170 g / m ²
An SMC-impregnated paper 4 as shown in FIG. 13 in which the kraft paper 3 having a basis weight of 80 g / m ² was laminated on the MC2 was prepared.
Then, with the configuration shown in FIG. 3B, the unsaturated polyester resin SMC2, the SMC-impregnated paper 4, and the basis weight 100 g
/ M ² liner paper 12 and a basis weight of 120 g / m ² of a core 11 having a thickness of 5 mm, a single-sided cardboard 1 a, and the same skin material 24 as in Example 1, respectively, and molding under the same conditions as in Example 1. Thus, an unsaturated polyester resin laminate A was obtained.

(Example 3) Using the same unsaturated polyester resin as in Example 1, glass fibers having a fiber length of 25 mm were used.
FIG. 1 with a basis weight of 220 g / m ² contained in an amount of wt.
An unsaturated polyester resin SMC2 like No. 1 was produced. And in the configuration shown in FIG. 2 (b), unsaturated polyester resins SMC2, basis weight 120 g / m ² of liner paper 12 and the basis weight 210g / m ² of the double-sided cardboard 1b thickness 5mm consisting interliner 11, Example 1 Same skin material 2
Unsaturated polyester resin laminated body A was obtained by using 4 and molding under the same conditions as in Example 1.

(Example 4) The same unsaturated polyester resin as in Example 1 was used to prepare 30 glass fibers having a fiber length of 15 mm.
FIG. 1 with a basis weight of 150 g / m ² contained in an amount of% by weight.
An unsaturated polyester resin SMC2 like No. 1 was produced. And in the configuration shown in FIG. 9, an unsaturated polyester resin SMC2, basis weight 75 g / m ² of liner paper 12 and the basis weight 180 g / m ² thickness 3mm consisting center core 11 of the double-sided cardboard 1b, the same skin as in Example 1 The unsaturated polyester resin laminate A was obtained by molding each material 24 under the same conditions as in Example 1.

Example 5 The same unsaturated polyester resin as in Example 1 was used to prepare 60 glass fibers having a fiber length of 50 mm.
FIG. 1 with a weight per unit area of 500 g / m ²
An unsaturated polyester resin SMC2 like No. 1 was produced. The thickness of the unsaturated polyester resin SMC2, the flame-retarded liner paper 12 having a basis weight of 50 g / m ^{2 and} the flame-retardant core 11 having a basis weight of 120 g / m ^{2 in} the configuration shown in FIG. 3mm single-sided cardboard 1a
Unsaturated polyester resin laminated body A was obtained by using each of the above and molding under the same conditions as in Example 1.

(Example 6) The same unsaturated polyester resin as in Example 1 was used to produce 50 glass fibers having a fiber length of 25 mm.
FIG. 1 with a basis weight of 150 g / m ² contained in an amount of% by weight.
1. Make an unsaturated polyester resin SMC2 such as
An unsaturated polyester resin S containing the same unsaturated polyester resin as in Example 1 and having a fiber length of 25 mm in an amount of 30% by weight and having a basis weight of 100 g / m ²
An SMC-impregnated paper 6 with a thermoplastic resin film as shown in FIG. 14 was produced by laminating a laminate material of Kraft paper 3 having a basis weight of 80 g / m ² and thermoplastic film 5 of EVA having a thickness of 50 μm on MC2. 8B, the unsaturated polyester resin SMC2, the SMC-impregnated paper 6 with a thermoplastic resin film, and the basis weight 1
20 g / m ² liner paper 12 and basis weight 210 g /
5 mm thick double-sided corrugated board 1 consisting of m ² core 11
b, using the same skin material 24 as in Example 1, the unsaturated polyester resin laminate A was obtained by molding under the same conditions as in Example 1.

[0030] Using (Comparative Example) basis weight 260 g / m ² of liner paper 12, center core 11 having a basis weight 210g / m ^2, the polyethylene film 13, respectively, by molding under the same conditions as in Example 1, 15 A composite cardboard B having the layer structure shown in was produced. With respect to the unsaturated polyester resin laminate A obtained in Examples 1 to 6 and the composite cardboard B obtained in Comparative Example, the weight per unit area (excluding the skin material) was measured in order to evaluate the lightness, and the dimensional change rate was further measured. , Deep drawability, rigidity (maximum bending load), flame retardancy were measured, and simultaneous skin formability was evaluated. Table 1 shows the results.

Here, the dimensional change rate was measured during heat resistance and humidity resistance. The dimensional change rate at the time of heat resistance was measured by heating the test material in a dryer at 100 ° C. for 24 hours and measuring the dimension L before heating and the dimension L ₁ after heating. It was obtained by calculation from the formula of [(L ₁ −L) / L] × 100. In addition, the dimensional change rate when moisture resistance is 50
The dimension L before moisture absorption and the dimension L ₁ after moisture absorption were measured by performing a moisture absorption treatment in a thermo-hygrostat at 95 ° C. and 95% RH for 24 hours, and the dimension change rate (%) = [(L ₁ − L) /
L] × 100.

The deep drawability test was carried out on the unsaturated polyester resin laminate A and the composite cardboard B of each Example and Comparative Example obtained by molding using a mold that is bent at an angle of 90 ° and molded. As shown in FIG. 16, the unsaturated polyester resin laminate A and the bending molded part (R
= 5 mm). And, when the angle D is 88 ° to 90 °, "◎", 8
Those having an angle of 6 ° to less than 88 ° were evaluated as “◯”, those having an angle of 84 ° to less than 86 ° were evaluated as “Δ”, and those less than 84 ° were evaluated as “x”.

For the rigidity test, a test piece of 50 mm × 150 mm was used, with a span of 100 mm and a head speed of 50 m.
3 with an ASTM 3-point bending jig under the condition of m / min
A point bending test was performed and the maximum load was evaluated for rigidity.
Simultaneous skin formability was evaluated by whether or not the skin material adheres during molding as in each of the examples and comparative examples. The one that adheres was evaluated as “◯”, and the one that did not adhere was evaluated as “x”. Note that the definition of adhesion is 1 for a skin material with a width of 25 mm and a length of 150 mm.
What is peeled under a load of 0.5 kgf or more in the 80 ° peel test is adhered, and those peeled under a load of less than 0.5 kgf are not adhered.

Flame retardancy is based on the American automobile safety standard FMV.
All specimens extinguish by the marked line A, or extinguish within 50 mm and judged by SS302 combustion test.
"○" corresponds to the self-extinguishing property of extinguishing within seconds, or U _B having a combustible retardation class 1 of 50 mm / min or less is "○", and U _B exceeds 50 mm / min and 75 mm / mi.
Corresponds to class 2 or slower flame retardant of n or less or U _B is 75 m
Those that correspond to the retarded flame class 3 exceeding m / min and 100 mm / min or less were marked with “Δ”, and those that did not correspond to any were marked with “x”.

[0035]

[Table 1]

As can be seen from Table 1, it is confirmed that the weight of each of the examples is comparable to that of the comparative example and is light. It is also confirmed that the dimensional change of each example is smaller than that of the comparative example, the dimensional stability is excellent, the deep drawing workability and the flame retardancy are also excellent. It is also confirmed that the rigidity of each example is equal to or higher than that of the comparative example.

[0037]

As described above, according to the first aspect of the present invention, the unsaturated polyester resin SMC is laminated and integrated on both sides of the corrugated cardboard. By curing the unsaturated polyester resin, the unsaturated polyester resin laminate can be fixed in a drawn shape, and deep drawing can be performed, and the unsaturated polyester resin S
The hardened layer of MC has high rigidity, and it is possible to obtain an unsaturated polyester resin laminate having excellent strength, and it is not necessary to laminate metal plates to obtain strength, and it is lightweight. It is excellent. Furthermore, the cured layer of the unsaturated polyester resin SMC has a smaller dimensional change with respect to heat and moisture than the thermoplastic resin and is excellent in dimensional stability.

Further, in the inventions of claims 2 and 3, the SMC-impregnated paper in which the paper is laminated on one surface of the unsaturated polyester resin SMC is laminated on the cardboard so that the paper is on the outside to be integrated. Therefore, the paper can be laminated at the same time when the unsaturated polyester resin laminate is formed, and the man-hour for attaching the paper for backing is unnecessary.

Further, the invention of claim 3 or claim 4 is an SMC-impregnated paper with a thermoplastic resin film obtained by laminating a paper obtained by laminating a thermoplastic resin film on one surface of an unsaturated polyester resin SMC, wherein the thermoplastic resin film is outside. Since it is laminated on the cardboard so as to be integrated, the thermoplastic resin film can be laminated simultaneously with the molding of the unsaturated polyester resin laminate, and the outer skin material can be fused by the thermoplastic resin film. Can be attached to the unsaturated polyester resin laminate, and the skin material can be laminated simultaneously with molding.

[Brief description of drawings]

FIG. 1 shows an example of the present invention.
(B) is an exploded sectional view, respectively.

FIG. 2 shows another example of the present invention (a),
(B) is an exploded sectional view, respectively.

FIG. 3 shows another example of the present invention (a),
(B) is an exploded sectional view, respectively.

FIG. 4 illustrates another example of the present invention (a),
(B) is an exploded sectional view, respectively.

FIG. 5 shows another example of the present invention,
(B) is an exploded sectional view, respectively.

FIG. 6 shows another example of the present invention.
(B) is an exploded sectional view, respectively.

FIG. 7 shows another example of the present invention (a),
(B) is an exploded sectional view, respectively.

FIG. 8 shows another example of the present invention (a),
(B) is an exploded sectional view, respectively.

FIG. 9 is an exploded sectional view showing another example of the present invention.

FIG. 10 is a schematic view showing an apparatus for producing an unsaturated polyester resin SMC.

FIG. 11 is a cross-sectional view showing the layer structure of an unsaturated polyester resin SMC.

FIG. 12 is a schematic view showing an apparatus for producing SMC-impregnated paper.

FIG. 13 is a cross-sectional view showing the layer structure of SMC-impregnated paper.

FIG. 14 is a cross-sectional view showing the layer structure of SMC-impregnated paper with a thermoplastic resin film.

FIG. 15 is an exploded cross-sectional view showing a conventional example.

FIG. 16 is a sectional view showing a deep drawability test.

[Explanation of symbols]

 1 Cardboard 1a Single-sided cardboard 1b Double-sided cardboard 2 Unsaturated polyester resin SMC 3 Paper 4 SMC impregnated paper 5 Thermoplastic resin film 6 SMC impregnated paper with thermoplastic resin film

Claims (7)

[Claims] 1. An unsaturated polyester resin laminate, characterized in that the unsaturated polyester resin SMC is laminated and integrated on both sides of a cardboard. 2. An SMC-impregnated paper in which an unsaturated polyester resin SMC is laminated on one surface of a cardboard and an unsaturated polyester resin SMC is laminated on one surface of the other surface of the cardboard so that the paper is on the outside. An unsaturated polyester resin laminate characterized by being laminated on and integrated with. 3. An S with a thermoplastic resin film, which is obtained by laminating a paper obtained by laminating a thermoplastic resin film on one surface of an unsaturated polyester resin SMC on one surface of a cardboard.
MC-impregnated paper is laminated so that the thermoplastic resin film is on the outside, and on the other surface of the cardboard,
Unsaturated polyester resin SMC with paper laminated on one side
An unsaturated polyester resin laminate, characterized in that MC-impregnated paper is laminated and integrated so that the paper is on the outside. 4. A thermoplastic resin film-coated S obtained by laminating a paper obtained by laminating a thermoplastic resin film on one surface of an unsaturated polyester resin SMC on one surface of a cardboard.
An unsaturated polyester resin laminate, characterized in that MC-impregnated paper is laminated so that the thermoplastic resin film is on the outside, and the unsaturated polyester resin SMC is laminated on the other surface of the cardboard and integrated. 5. The unsaturated polyester resin laminate according to any one of claims 1 to 4, wherein the cardboard is a single-sided cardboard. 6. The unsaturated polyester resin laminate according to any one of claims 1 to 4, wherein the cardboard is a double-sided cardboard. 7. The unsaturated polyester resin laminate according to claim 1, wherein the weight per unit area of the unsaturated polyester resin SMC is 50 to 500 g / m ² .