JP2514193B2 - Moldable laminated sheet - Google Patents

Description

The present invention relates to a moldable laminated sheet obtained by adhering a three-dimensionally entangled nonwoven sheet to at least one surface of a thermoplastic resin sheet. More specifically, the present invention relates to a laminated sheet excellent in moldability, which is formed by laminating and adhering a non-woven sheet having a felt-like dense fiber density and rich in elasticity and a thermoplastic resin sheet.

Since such a laminated sheet has excellent decorative properties, cushioning properties, impact resistance and the like, it is used as a molding material for food containers, automobile interior materials, building materials, interiors and the like.

[Conventional technology]

It is known that a thermoplastic sheet material is molded and used as a molded product. As a molding method at that time, a pressing method using a die, a vacuum molding method, a pressure molding method, or the like is used. In the pressing method, generally, a male type and a female type must be used, and the production rate is slow and inefficient. On the other hand, the vacuum forming method or the pressure forming method has an advantage that it can be efficiently processed by a simple apparatus, but it is necessary to use a thermoplastic sheet material having a low air permeability.

From this point of view, conventionally, a thermoplastic resin sheet has been widely used as a molding material. However, it is inferior in decorative properties such as high-grade appearance, cushioning properties, and impact resistance. Therefore, a known laminate of a non-woven sheet and a resin sheet is used as a molding material. What is necessary at this time is that the stress during molding does not cause ground cracking due to the displacement of the fiber structure of the non-woven sheet. When cracks in the ground occur, the abrasion resistance of the surface is lowered, fluffing is likely to occur, and defects such as poor appearance quality and deformation occur. On the other hand, in order to prevent ground cracking, if the fibers are fixed by heat fusion between the fibers or by bonding with an adhesive, it is difficult to deform the sheet even if external force is applied during molding. It becomes difficult to process deep irregular shapes and complex shapes.

As a method for improving the above-mentioned drawbacks, Japanese Patent Publication No. 56-39254 discloses a non-woven sheet made of semi-stretched polyester fiber that easily stretches against external force under heating. However, this method has some molding processability because it is a non-woven sheet in which semi-drawn yarns are composite or laminated of drawn yarns, but it is not possible to completely prevent ground cracking.
In addition, the one using a non-woven sheet that is only half stretched is
It is disclosed in Japanese Patent No. 55-7432. However, simply using semi-stretched fibers causes various problems and is not practical. For example, since semi-stretched fibers have the property of shrinking when heated, it is necessary to take measures to prevent shrinkage during the bonding process with the resin sheet and the molding process.
Measures such as bonding at low temperature and clamping on all sides are necessary.

Therefore, when using a laminated sheet as a molding material, it is necessary to mold deep unevenness over a wide temperature range or to form a complicated material when molding using all kinds of molding methods including vacuum molding and pressure molding. It has excellent moldability that allows it to be molded into various shapes; the molded product does not easily lose its shape due to external force, and its shape does not shrink or deform due to heating. thing;
High-grade appearance, decorativeness such as touch and design, 180 ° C
The heat resistance, impact strength, cushioning, and
It is excellent in practical characteristics such as.

As described above, the inventors of the present invention have earnestly studied the characteristics required for the moldable laminated sheet, and as a result, three-dimensionally entangled by needle punching, etc., and then obtained by heat treatment under specific conditions. It has been found that a laminated sheet of a non-woven sheet and a thermoplastic resin sheet satisfies the above-mentioned required properties, and has arrived at the present invention.

[Problems to be solved by the invention]

The object of the present invention is to improve the above-mentioned drawbacks of conventional molding materials, molding processability, shape retention of molded products, and decorativeness, abrasion resistance, heat resistance, cushioning property, impact strength. It is an object of the present invention to provide a moldable laminated sheet which has excellent practical properties such as the above and can be applied with any molding method.

[Means for solving problems]

An object of the present invention is a laminated sheet formed by adhering an unstretched polyester long-fiber non-woven sheet having a birefringence of 0.01 to 0.07 to at least one surface of a non-foamed thermoplastic resin sheet, which has a boiling water shrinkage ratio. 10% or less, 100% breaking elongation at 120 ℃
As mentioned above, the 30% elongation stress at 120 ° C is 50 kg / cm ² or less, it is formed by three-dimensional entanglement, and the apparent density is 0.20 to 0.50.
Achieved by a formable laminated sheet characterized in that it is g / cm ³ .

The present invention can be obtained by performing three-dimensional entanglement of a fibrous web containing latently shrinkable fibers, and then adhering the non-woven sheet obtained by the heat treatment for heat shrinkage and the thermoplastic resin sheet.

Since the formable laminated sheet of the present invention is obtained by the method described above, the nonwoven sheet used in the present invention is closely related to the moldability, which is the object of the present invention. That is, the excellent processability of the nonwoven sheet leads to the excellent processability of the laminated sheet obtained by adhering the resin sheet.

Therefore, it is necessary that the nonwoven sheet used in the laminated sheet of the present invention has excellent moldability.

Heat treatment is performed to improve the moldability of the non-woven sheet. The heat treatment is necessary in order to prevent the ground sheet from cracking or deforming even if the nonwoven sheet is densified and is molded into a deep uneven shape or a complicated shape.

Hereinafter, the nonwoven sheet used in the present invention will be described in detail.

The non-woven sheet used in the present invention is, for example, the non-woven sheet proposed in Japanese Patent Application No. 60-203420 by the same applicant as the present invention,
That is, a long-fiber non-woven sheet made of a thermoplastic polymer having a fiber-forming property, in which the single fibers constituting the non-woven sheet are substantially woven and three-dimensionally entangled in the non-woven sheet. , The average apparent density of the non-woven sheet is 0.20
A long-fiber non-woven sheet characterized by having a shrinkage ratio of 5% or less at 150 ° C. and a 20% tensile modulus of 20 kg / cm ² or less at 150 ° C. in the range of 0.50 g / cm ³ be able to. However, it is not limited to this non-woven sheet.

The non-woven sheet is subjected to a heat treatment for shrinking the area by 10% to 70% in order to improve the moldability which is the object of the present invention. The web of the present invention can be prepared by mixing a short fiber web in addition to a web of unstretched polyester long fibers having a birefringence of 0.01 to 0.07.

The nonwoven sheet used in the present invention has a dense fiber density by heat treatment for heat shrinkage, and its average apparent density is 0.
It is 20 to 0.50 g / cm ³ . Since the non-woven sheet has a dense structure, the fiber gap is not conspicuous and a felt-like appearance excellent in aesthetics is maintained even when a deep uneven shape or a complicated shape is formed. When the average apparent density is 0.20 g / cm ³ or less, the structure is coarse, and therefore, when molding deep ruggedness, the fiber gaps are enlarged, resulting in a non-uniform rough appearance. On the other hand, when the average apparent density is 0.50 g / cm ³ or more, since the dense structure is too dense, the movement of the constituent fibers is considerably restrained when molding processing such as the shape of deep unevenness, and the fitting to the mold is poor. ,
Poor moldability.

The fineness of the fibers constituting the non-woven sheet used in the present invention is 30
Denier or less, preferably 0.5 denier to 10 denier. On the other hand, when staple fiber is used as the raw material fiber, the fiber length is about 35 mm to 76 mm.

The basis weight of the non-woven sheet used in the present invention is 30 to 600 g / c.
It is preferably m ² . However, the present invention is not limited to this.

If desired, a water-permeable agent, a water-repellent agent, an antistatic agent, a pigment, a dye, a transfer print or the like can be added to the non-woven sheet.

Next, one example of the non-woven sheet manufacturing method used in the present invention,
This will be specifically described. Needless to say, the manufacturing method is not limited to this.

Using a well-known spunbond process, the birefringence of 0.01-
A web made of polyester fibers having a breaking elongation of 100% or more at 0.07, 25 ° C is formed. This web is needle punched. In order to prevent the web from being disturbed when performing needle punching, the embossing roll provided with a convex portion on the surface makes it possible to press the area above the secondary transition point and below the secondary transition point + 30 ° C at a pressure bonding area ratio of 5 to 50% It is good to thermocompress. However, this partial thermocompression bonding may be omitted. Needle punching is affected by needle count, needle shape, depth of penetration, and number of punches. Therefore, it is necessary to select the needle punching conditions so that the fiber web can sufficiently obtain three-dimensional entanglement. For example, the depth of contact is 10 mm ~
20 mm and the number of punches is preferably 50 to 500 times / cm ² .

Then, the needle punched nonwoven sheet is subjected to heat treatment for shrinking by heating. In this case, heat treatment is performed by heating to a temperature at which heat shrinkage occurs or higher (in the case of polyester fibers, a temperature of the second transition point or higher and a melting point of -60 ° C or lower).

In this heat treatment, the condition is selected so that the area of the non-woven sheet before shrinkage is 10% to 70%. For example, for heat treatment, Tentane uses a cylinder, hot water tank, steam tank, etc. to heat dry heat, wet heat hot water,
Heat shrinks uniformly in a sheet.

If necessary, use a felt calendar etc.,
The surface may be flattened or the embossing roll may be used to pattern the surface.

Incidentally, the polyester fiber having a birefringence of 0.01 or more becomes rigid and brittle due to the heat treatment described above, and the strength is reduced,
Not practical. On the other hand, when the birefringence is 0.07 or more, the heat shrinkage becomes 15% or less even if the above-mentioned heat treatment is performed, and it cannot be used in the present invention.

The nonwoven sheet obtained by the above heat treatment has a boiling water shrinkage of 10% or less, a breaking elongation at 120 ° C of 100% or more, and a 120 ° C.
Has a 30% elongation stress of 50 kg / cm ² or less and an average apparent density of
0.20 ~ 0.50g / cm ³ , the crystallinity index of the constituent fibers is 15% ~ 45
%, Preferably 20 to 40%. The crystallinity index is necessary for preventing thermal deterioration at the temperature during molding, facilitating the molding, preventing deformation of the molded product, and ensuring dimensional stability. When the crystallinity index is less than 15%, the nonwoven sheet is deteriorated, discolored, and fused to the mold at the temperature during molding. If it exceeds 45%, it becomes difficult to mold deep irregularities and complex shapes.

Since the non-woven sheet was shrunk by the above-mentioned heat treatment, the fiber density became high, the needle punch holes were hardly noticeable, and no fluffing occurred, and the appearance was felt. Furthermore, in the temperature range of the molding process (100 ° C to 220 ° C), a non-woven sheet having a small heat shrinkage, a high breaking elongation and a low 30% elongation stress was obtained. This non-woven sheet itself is also excellent in moldability as referred to in the present invention.

Next, the method for producing the moldable laminated sheet of the present invention will be described in detail.

The moldable laminated sheet of the present invention comprises the above-mentioned non-woven sheet and a thermoplastic resin sheet, which are prepared by a known method (for example, extrusion lamination, lamination using an adhesive, or partial fusion-bonding lamination using ultrasonic waves, It is obtained by using a method of performing partial thermocompression bonding with a pair of embossing rolls.

The thermoplastic resin sheet used in the present invention means a non-foamed thermoplastic resin (hereinafter, simply referred to as a thermoplastic resin sheet), polyethylene, partially crosslinked polyethylene, polyolefin such as polypropylene, polystyrene,
Polyamide-based, polyester-based, polyvinylidene chloride-based, polyurethane-based bushes or copolymer resins, and sheets of mixed resins such as plasticizers, pigments, additives, etc. The resin sheet is a composite of the above resin film.

The moldable laminated sheet of the present invention obtained by the above method has a boiling water shrinkage of 10% or less, a breaking elongation at 120 ° C of 100% or more, and a 30% elongation stress of 120 ° C of 50 kg / cm ² or less. . The value of the characteristic relating to the forming process of the laminated sheet shown here is the same as the preferable value of the corresponding characteristic of the non-woven sheet itself as described above. This is because the thermoplastic resin sheet is more likely to be plasticized than the non-woven sheet under the heating conditions where the molding process is performed, and the thermoplastic resin sheet has the function of reducing the air permeability of the laminated sheet, This is due to the fact that it makes almost no contribution to the above properties.

Regarding the characteristics of the formable laminated sheet, boiling water shrinkage is 10
% Or less is necessary in order to prevent the laminated sheet from shrinking and deforming due to preheating or heating at the time of molding and causing distortion in the molded product, and to obtain a molded product of good quality. .

Also, the breaking elongation at 120 ° C and the 30% elongation stress at 120 ° C are
Since it is closely related to moldability such as deformation during molding and familiarity with the mold, the breaking elongation at 120 ℃ is 100% or more, 12
A 30% elongation stress at 0 ° C of 50 kg / cm ² or less is necessary for forming deep unevenness and complex shapes. Further, it is preferable that the initial elongation stress is large near the operating temperature of the molded product in order to make it difficult to deform with respect to the external force related to the shape retention of the molded product.

The thus obtained laminated sheet of the present invention is molded by using a known molding method such as vacuum molding, pressure molding or press molding. At that time, it is appropriate to preheat the laminated sheet and then perform the molding process. It is preferable that the above-mentioned laminated sheet is not peeled off into two or more layers by a molding process. For example, it is preferable that peeling strength between constituent layers such as a nonwoven sheet and a resin sheet is 100 g / 3 cm or more.

Note that, as described above, the thermoplastic resin sheet is easily plasticized. That is, the thermal modulus is low. Therefore, if the thermoplastic resin sheet is molded by itself, it may be partially expanded, and uniform molding cannot be performed. The composite laminated sheet according to the present invention is characterized in that the nonwoven sheet itself has a higher thermal modulus than the thermoplastic resin sheet, so that the whole sheet can be uniformly stretched and molded. On the other hand, in the laminated sheet according to the present invention, since the thermoplastic resin sheet is used, the air permeability becomes small, and vacuum forming or pressure forming, which is difficult to use in forming a nonwoven sheet cushion, can be used. In addition, since the laminated sheet is provided with shape retention by the non-woven sheet,
It is possible to use a thinner sheet, for example, a sheet having a thickness of 100 μm or less, as compared with the case where a molded product is made of a thermoplastic resin sheet.

By using the moldable laminated sheet of the present invention thus obtained in the molding process, the surface has a fiber-like appearance and tactile sensation, which has not been obtained until now, and a decorative property showing the image of deplasticization. By using a bulky non-woven sheet, an excellent molded product can be obtained in which cushioning properties, impact strength, heat resistance, etc. exhibited.

〔Example〕

The present invention will be specifically described below with reference to examples. still,
The definition of the characteristics described in the examples and the measuring method are shown below.

◎ Average apparent density (according to JIS-L-1096) The unit weight is measured from a test piece of 20 cm x 20 cm, and the thickness is measured with a dial gauge (stylus diameter 10 mmφ, mass 80 g), and the weight per unit volume is calculated and expressed. .

◎ Birefringence The birefringence (Δn) is measured using a polarizing microscope Belex compensator under white light.

◎ Strength and Elongation (according to JIS-L-1096) Determined by Shimadzu's Auto Graph DSS-2000 type universal tensile tester, grasping length 10 cm, pulling speed 20 cm / min at 25 ° C and 150 ° C. .

The 30% elongation stress is represented by the value obtained by dividing the strength at 30% elongation by the cross-sectional area of the sample.

 However, in the case of a single yarn, the initial load is 0.1 g / d.

◎ Breathability (according to JIS-L-1096) Measure using a Frajour tester.

◎ Crystallinity index The crystallinity index of X-ray diffraction intensity in the equatorial direction is determined by the equatorial reflection method.

The X-ray diffraction intensity is the X-ray generator (RU-200P manufactured by Rigaku Denki Co., Ltd.).
L) and a goniometer (SG-9R), a scintillation counter for the measuring tube, and a wave height analyzer for the counting unit.
Cu / Kα rays monochromatic with a nickel filter (wavelength = 1.
Measure with 5418Å). The fiber sample is set in an aluminum sample holder so that the fiber axis is perpendicular to the X-ray diffraction plane. At this time, the thickness of the sample is set so as to be about 0.5 m / m.

X-ray generation is operated at 30KV, 80mA, scanning speed 1 ° / min, chart speed 10mm / min, time constant 1 second, divergence slit 1/2 °, receiving slit 0.3m / m, scattering slit 1 / Record the diffraction intensity at 2 ° from 2 ° 35 ° to 7 °. The full scale of the recorder is set so that the diffraction intensity curve is within the scale. Polyethylene terephthalate fibers generally have three major reflections in the range of the equatorial ray diffraction angle 2θ = 17 ° to 26 ° [low angle side (100) (010) (1
0) surface]. FIG. 1 shows an example of an X-ray diffraction intensity curve of polyethylene terephthalate fiber. (A in the figure is a crystal part, b
Represents an amorphous part. ) The crystallinity index is 2 from the obtained X-ray diffraction intensity curve.
A straight line connects the diffraction intensity curves between θ = 7 ° and 2θ = 35 ° to form a baseline. As shown in FIG. 4, a valley near 2θ = 20 ° is set as the apex, and a straight line is connected along the skirts of the low angle side and the high angle side to separate it into a crystalline part and an amorphous part, and the area method is calculated according to the following formula.

◎ Thermal deterioration After leaving in a 105 ° C hot air dryer for 300 hours, perform a tensile test and measure the breaking elongation. The elongation retention is calculated from the elongation at break before and after exposure at 105 ° C.

L ₁ : Elongation at break before exposure, L ₂ : Elongation at break after exposure, ◎ Tear strength (according to JIS-L-1096) A 5 cm x 15 cm test piece is taken in each of the vertical and horizontal directions, and the tensile tester is used. (Single tongue method).

◎ Boiled water shrinkage (nonwoven sheet) A sample of 25 cm x 25 cm is placed on each of the vertical and horizontal 20 cm positions, immersed in boiling water for 5 minutes, and then taken out to measure the dimensional change of the sample and the shrinkage of N = 5. The average value is shown.

◎ Abrasion resistance A 20 cm vertical × 3 cm horizontal test piece was rubbed 100 times with a friction tester type II (Gakushin type) at a load of 500 g, and then the appearance change of the test piece was judged according to the following criteria. As a guideline for abrasion resistance.

(Judgment criteria) Class A: No fuzz at all.

Class B: Some fluff but not noticeable.

Class C: Conspicuous fuzz.

◎ Impact resistance: A 30mmφ hole in the center and an 8mmR edging on the hole make it 10cm x 10cm x 3cm in height. Fixed and 25
A metal ball with a load of 150 g was dropped at a temperature of ℃, and the height is expressed so that the sample does not break.

Example 1. Using a rectangular spinneret having a hole diameter of 0.25 mm and 1000 holes, polyethylene terephthalate having a discharge rate of 850 g / min and an intrinsic viscosity of 0.75 was spun at a melting temperature of 295 ° C., and the spinning speed was changed to form a wire mesh. Collect on top to form a web with a basis weight of 160 g / m ² . The properties of the fibers that make up the resulting web are shown in Table 1. This web was subjected to partial thermocompression bonding at a temperature of 80 ° C. and a linear pressure of 20 kg / cm using a pair of embossing rolls having a protrusion with a compression ratio of 12%, and then needle punching was performed. The condition is the needle
No. 40 regular type, depth of penetration 12 mm, number of punches
It was performed 160 times / cm ² to obtain an intermediate product. The properties of this intermediate product are shown in Table 2. Then, a heat treatment for heat-shrinking this intermediate product was performed. Processing conditions are based on the area of the intermediate product
The width and length were regulated so as to shrink the surface area by 50%, and heat treatment was performed for 30 seconds at a pin tenter temperature of 100 ° C. However, the comparative example experiment No. does not cause heat shrinkage, so simply 100 ° C. for 30 seconds,
It has undergone a heat history. The properties of the resulting nonwoven sheet are shown in Table 3.

The non-woven sheet and a low crystalline polyester resin sheet (Eastman Co., Ltd., weight: 100 g / m ² ) of 75 μ were laminated and adhered. Approximately 15 g / room temperature curable urethane adhesive (Takeda Yakuhin Kogyo 2-liquid reaction type) on one side of the resin sheet
m ^{2 was} applied and adhered to the non-woven sheet. The characteristics of the obtained laminated sheet are shown in Table 4. However, Comparative Example Experiment No. shows the characteristics of the low crystalline polyester resin sheet.

It can be said from Tables 1 to 4 that the non-woven sheet used in the present invention is obtained by three-dimensionally interlacing a web made of fibers having a latent shrinkability of 15% or more and heat-treating the web. The resulting non-woven sheet has a high average apparent density, is densified, has a low boiling water shrinkage, has a high breaking elongation when heated at 120 ° C, and has a low 30% elongation stress at 120 ° C and wear resistance. Excellent in heat resistance and heat deterioration. Therefore, preheating during molding,
Alternatively, a non-woven sheet was obtained which was not deformed or deteriorated by heating and could be easily deformed into a deep uneven shape or a complicated shape, and was well adapted to the mold.

Next, the non-woven sheet having excellent moldability and the laminated sheet formed by adhering the thermoplastic resin sheet have a felt-like appearance, a small boiling water shrinkage ratio, and a moldable temperature of 100 ° C to 180 ° C. At that time, it has a high elongation at break elongation of 100% or more, and a low 30% elongation stress of 50 kg / cm ² or less,
It had excellent moldability. Further, it has been found that it has low air permeability and can be used as a base material for vacuum molding and pressure molding.

Next, the laminated sheet of the present invention became a tough sheet having excellent tear strength and impact resistance.

On the other hand, the non-woven sheets of Comparative Example Experiment No. and the laminated sheets of Comparative Example Experiment Nos. Were inferior in the properties, molding processability and practical properties targeted by the present invention.

Example 2 Using the laminated sheet of Example 1, a molding process was performed.
1 hemispherical mold with a diameter of 10 cm and a maximum radius of 5 cm
Press molding was performed by heating to 20 ° C. Example Experiment No.
For ~, cracks did not occur in the ground, the height of the molded product was 4.9 cm, and no deformation occurred even when a load of 100 g was applied. As a result, it was found that the moldable laminated sheet of the present invention was excellent in moldability and mold retention.

On the other hand, in Comparative Example Experiment Nos. 1 to 4, the heat resistance, heat deterioration, deformation, extensibility, and other molding processability and the shape retention of the molded product were inferior, and the results satisfying the object of the present invention were not obtained.

Then, as a comparative example of molding processability, the experiment of Example 1
The No. intermediate product (Table 2) was molded in the same manner as described above. As a result, there are ground cracks, large fiber gaps, fuzz on the surface, deformation, etc.
The shape retention was poor.

Example 3. Fine denier 1.5 denier, 38 mm fiber length rayon short fibers on a cart machine to form a short fiber web with a basis weight of 100 g / m ² , pre-needle punching (needle 40 regular type, depth 13 mm, Short fiber sheets punched 30 times / cm ² ) and long fiber sheets obtained by partially thermocompressing the fiber web of Experiment No. 1 of Example 1 were laminated and then entangled by needle punching. Needle punch conditions: No. 40 regular barb, 12 mm depth, 200 punches / cm ²
I got an intermediate product. This intermediate product was heat-treated by heating it in a steam bath. This heat treatment reduced the area of the intermediate product before shrinkage to 42% area. Next, felt calender (temperature 120 ℃, processing speed 13m /
Min) and the surface was smoothed to obtain a nonwoven sheet.
(Average apparent density 0.26g / cm ³ ) Polystyrene resin (Mitsui Toatsu Co., Ltd., Tobolex) is used for the resin temperature by an extruder.
Extruded from T-die at 290 ℃, 0.15m on the non-woven sheet
After being coated with a thickness of m, the roll having a smooth surface was passed through to obtain a moldable laminated sheet of the present invention.

The characteristics of the obtained formable laminated sheet are that the boiling water shrinkage rate is 0.
%, 120 ° C breaking elongation is 183% vertical 175% horizontal, 120 ° C 30%
The% elongation stress was vertical 15 kg / cm ² horizontal 12 kg / cm ² , tear strength was vertical 3070 g horizontal 2750 g, and impact strength was 58 cm.

Then, molding processing was performed. For the molding process, the laminated sheet was preheated to 150 ° C., and vacuum molding was performed using a rectangular parallelepiped concave-convex mold having a length of 10 cm × width of 10 cm × depth of 3 cm. However, the vacuum forming should be such that the non-woven sheet is on the outside. Even when the obtained molded product was heated in an atmosphere at a temperature of 120 ° C for 30 minutes, dimensional change and deformation did not occur.

As a result, the moldable laminated sheet of the present invention had a felt-like appearance and was excellent in high-grade quality, decorativeness such as touch, moldability and heat resistance.

〔The invention's effect〕

The moldable laminated sheet of the present invention is a laminated sheet of a non-woven sheet which is small in heat shrinkage and easily stretched in a wide molding temperature range and a thermoplastic resin sheet, and therefore has a deep uneven shape and a complicated shape. Can be molded, and the molded product has excellent shape retention. A non-woven sheet with a felt-like appearance and texture gives the decorativeness of a deplasticized image and has excellent practical properties such as heat resistance, cushioning property and impact strength. It can be widely used as a substitute, and because it has unprecedented functions, it can be applied to fields where general-purpose plastics also had problems.

For example, it can be widely used as a molding material for various trays such as foods and cosmetic boxes, automobile interior materials, interior materials, and packaging materials.

[Brief description of drawings]

FIG. 1 is a graph showing an example of the X-ray diffraction intensity of polyethylene terephthalate fiber.

Claims (2)

(57) [Claims] 1. A laminated sheet comprising a non-stretched polyester filament non-woven sheet having a birefringence of 0.01 to 0.07 bonded to at least one surface of a non-foamed thermoplastic resin sheet.
Boiling water shrinkage is 10% or less, 120 ° C breaking elongation is 100% or more,
The 30% elongation stress at 120 ° C. is 50 kg / cm ² or less, the long fiber non-woven sheet is formed by three-dimensional entanglement of fibers, and the average apparent density is 0.20 to 0.50 g / cm ^3. Formable laminated sheet. 2. The moldable laminated sheet according to claim 1, wherein the non-foamed thermoplastic resin sheet is a single layer sheet, a heterogeneous multilayer sheet, a film or a combination thereof.