JP2003118052A - Laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate for a tarpaulin or a waterproof sheet not containing a substance causing the generation of dioxins and having high frequency fusing and stitching properties and necessary surface strength. SOLUTION: A fiber base fabric comprises polyolefinic synthetic fibers and a coating resin layer has a two-layered structure comprising an inner layer comprising an ethylenic copolymer resin and an outer layer comprising a polyolefinic synthetic resin. No chlorine is contained in use materials, and the fiber base fabric and the coating resin layer can be integrally melted to be fitted to material recycling and satisfy high frequency fusing and stitching properties and necessary surface strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate used for tarpaulins, waterproof sheets and the like. In particular, the present invention relates to a laminate in which an olefinic material is used in place of a vinyl chloride resin which has been widely used in this field, does not contain a substance causing a dioxin generation, and is material recyclable, and which is environmentally friendly and considers recycling of resources. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as tarpaulins and waterproof sheets, synthetic fibers such as polyester fibers coated with polyvinyl chloride resin have been widely used. This waterproof sheet has long held a dominant market share in civil engineering, construction, logistics, etc. due to its balanced practical performance such as high-frequency fusion sewability and flame resistance and economical efficiency. In recent years, since it has been confirmed that polyvinyl chloride resin produces dioxin depending on the conditions during combustion, the search for a so-called non-halogen type resin that replaces the polyvinyl chloride resin has been promoted. As the resin, a polyolefin-based polymer or copolymer, a copolymer of an ethylene monomer and a non-olefin-based monomer such as a vinyl or acrylic acid-based monomer has been studied, but a vinyl chloride resin is still practical. Nothing exceeds the product.

On the other hand, in order to protect the global environment, it has become important to reduce waste and reuse resources, but the conventional combination of polyester fiber base cloth and polyvinyl chloride resin Material recycling by the method of separating the base cloth and the resin or the method of forming a uniform melt,
Both of the thermal recycling methods used as fuel have a difficult problem, and most of them are actually discarded.

[0004]

An olefin containing no chlorine is used as a material that can meet the problems of environmental protection and resource reuse, which are difficult to solve by the conventional combination of polyester fiber base cloth and polyvinyl chloride resin, which has been the mainstream. Resins are regarded as one of the leading groups. However, one of the reasons that the polyvinyl chloride resin has almost monopolized the above-mentioned applications is high-frequency fusion sewability. Tarpaulin and waterproof sheet
The material to which this technique can be applied is clearly superior in terms of productivity and waterproofness of products such as container bags and tents when finished into the final products such as container bags and tents. Since ordinary polyolefin resins do not contain polar groups, heat generation due to electromagnetic wave induction does not occur and high-frequency fusion sewing cannot be used.

A monomer having a polar group is used as a means for introducing an exothermic property by induction of electromagnetic waves into a polyolefin resin.
Copolymerization with is well known. A large number of applications including a technique utilizing this are found, and for the purpose of imparting high-frequency fusion stitching property, an ethylene-vinyl acetate copolymer, ethylene-acrylic acid, or ethylene-methacrylic acid, its methyl or Many use ethyl ester copolymers. For example, Japanese Patent No. 3126439 discloses an olefin tarpaulin obtained by laminating a sheet of a composition obtained by adding 1 to 50% by weight of a polyolefin resin to an ethylene copolymer resin such as ethylene vinyl acetate to a base cloth. Is disclosed. Further, Japanese Patent Application Laid-Open No. 10-100330 discloses a laminate having an adhesive resin intermediate layer having a high frequency induction heat generation property, which is made of a specific compound, between the base cloth and the olefin resin layer. There are other similar patent applications, but the technical idea of integrally melting the base cloth and the coating resin layer for material recycling cannot be seen.

[0006]

[Means for Solving the Problems] As a result of studying materials that can meet the problems of environmental protection and resource reuse that are difficult to solve by combining polyester fiber base cloth and polyvinyl chloride resin, chlorine-free olefin resin It is expected that there is a possibility of combining the olefin resin with a polyolefin synthetic fiber base fabric that forms a uniform melt by heat. For high-frequency induction exothermicity which is lacking in general olefin resins, ethylene-based copolymers having polar groups such as ethylene-vinyl acetate copolymer can be used. However, these copolymers are softer than the polyolefin homopolymer and may be insufficient in strength required for the surface of the waterproof sheet. In such a case, it is conceivable that a polyolefin synthetic resin having higher hardness is laminated on the surface. In this case, the softening point and the thickness of the polyolefin synthetic resin layer on the surface are sufficient for the purpose of surface protection, while the softening and melting due to the heat generation of the ethylene copolymer layer of the inner layer causes the high-frequency fusion stitching property of the sheet. It must be set within the range that can be given.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The fibers or threads constituting the polyolefin-based synthetic fibers of the present invention are polypropylene fibers or polyethylene fibers, or multifilaments, monofilaments, short fiber spun yarns composed of these fibers,
Either a flat yarn or a split yarn may be used, and the cloth may be a woven fabric, a knitted fabric, or a non-woven fabric. Among them, polypropylene spun yarn or multifilament woven fabric is often adopted.

The main component of the ethylene copolymer resin layer of the present invention is ethylene-acrylic acid copolymer, ethylene-
Methyl acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-ethyl methacrylate copolymer,
A copolymer composition of ethylene and an unsaturated carboxylic acid such as maleic anhydride alone or a blend of two or more kinds of these, and an olefin resin as a minor component, and improvement of adhesion between layers and recycling. As a compatibilizer, a graft copolymer of polyolefin and vinyl polymer
Alternatively, a styrene elastomer may be added to improve the texture and the adhesiveness. Further, if necessary, an antistatic agent, an ultraviolet absorber, an antioxidant, a flame retardant, a pigment, a lubricant and the like well known in this field can be appropriately added.

The polyolefin resin layer of the present invention has preferred physical properties from those obtained by blending polypropylene resin with other polyolefin resin or olefin copolymer resin. )
A polypropylene block and (2) a copolymer of propylene and an α-olefin having 2 to 12 carbon atoms. A propylene-α-olefin block copolymer composed of an elastomer block, which has a weldability and an ethylene copolymer as subordinate components. A low density polyethylene resin may be added to improve the adhesion to the resin layer, and an ethylene copolymer may be added to improve the adhesion to the ethylene copolymer resin layer. Well-known antistatic agents, ultraviolet absorbers, antioxidants, flame retardants, pigments, lubricants, antiblocking agents and the like can be appropriately added.

The thickness of each of the ethylene-based copolymer resin layer and the polyolefin-based synthetic resin layer described above satisfies the function of the amount of heat generated by the former, which enables high-frequency fusion, and the latter, the strength against surface damage. It is set to a numerical value, and the thickness ratio of the two is 50 to 9 for the ethylene-based copolymer resin layer.
0%, the polyolefin-based synthetic resin layer is 10 to 50%, and the total thickness of both layers is preferably 50 to 400 μm. However,
The thickness of the polyolefin synthetic resin layer is preferably 20 μm or more for the purpose of surface protection. The laminating method for the above layers may be any of sheet laminating, calendering, T-die laminating, coextrusion laminating, and a combination thereof.

The melting point of any one of the polyolefin synthetic fiber base cloth, the ethylene copolymer resin layer and the polyolefin resin layer constituting the present invention is 170 ° C. or less,
As a result, the thermal deterioration of the constituent components due to the heat load in the process of manufacturing or recycling the laminate can be minimized, and excellent quality material recycling can be achieved.

[0012]

EXAMPLES Examples of the present invention will be described below.

Example 1 Polypropylene long-fiber fabric MS3112 as a base fabric
(340d × 340d / 26 × 26 / 2.54cm,
A basis weight of 80 g / m ² ) was used. In contact with the base cloth, as an ethylene-based copolymer resin layer, Lexpar ET-224 (JPO manufactured ethylene-based copolymer resin) 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 parts by weight PEX AOT-32 ( Antioxidant made by Tokyo Ink Co., Ltd.) 1 part by weight was formed into a film having a thickness of 0.07 mm by the T-die laminating method and directly laminated on a base cloth. Further thereon, as a polyolefin-based synthetic resin layer, Catalloy Z-104S (PP elastomer made by Sun Aroma-) 100 parts by weight Nipolon Z ZF230 (LLDPE made by Toso) 5 parts by weight PEX 6800A (white pigment made by Tokyo Ink) 3 parts by weight Part PPM ABT-15 (anti-blocking agent manufactured by Tokyo Ink) 1 part by weight PPM AST-42AL (antistatic agent manufactured by Tokyo Ink) 2 parts by weight was directly applied to a film having a thickness of 0.03 mm by the T-die laminating method to obtain the above ethylene. The system copolymer resin layer is attached to the laminated surface. Laminate the back side in the same way.
To obtain a total of 5 layers of laminate including the base fabric.

Example 2 Polypropylene short fiber spun yarn woven fabric DIN as the base fabric
8000 (24th pair x 24th pair / 49 x 39 pieces / 2.5
4 cm, basis weight 185 g / m ² ) was used. As an ethylene-based copolymer resin layer in contact with the base cloth, Evaflex P-2805 (EVA resin manufactured by Mitsui DuPont Polychemical) 100 parts by weight PEX 6800A (white pigment manufactured by Tokyo Ink) 3 parts by weight PEX AOT-32 (Tokyo Ink) Antioxidizing agent) 1 part by weight PEX UVT-51 (Tokyo Ink weathering aid) 2 parts by weight was formed into a film having a thickness of 0.09 mm by the T-die laminating method and directly laminated on a base cloth. Further thereon, as a polyolefin-based synthetic resin layer, Catalloy Z-104S (PP elastomer made by Sun Aroma-) 100 parts by weight Nipolon Z ZF230 (LLDPE made by Toso) 5 parts by weight PEX 6800A (white pigment made by Tokyo Ink) 3 parts by weight Part PEX UTV-51 (Tokyo Ink weathering aid) 2 parts by weight PEX-1338 (Tokyo Ink UV absorber) 2 parts by weight PPM ABT-15 (Tokyo Ink anti-blocking agent) 1 part by weight PPM AST-42AL ( Antistatic agent manufactured by Tokyo Ink Co., Ltd.) 2 parts by weight of a film having a thickness of 0.03 mm is directly adhered to the laminated surface of the ethylene copolymer resin layer by a T-die laminating method. Laminate the back side in the same way.
To obtain a total of 5 layers of laminate including the base fabric.

Example 3 With the same base fabric and the same formulation as in Example 2, the thickness balance of the T-dilaminate was changed, and the thickness of the ethylene copolymer resin layer was changed from 0.09 mm to 0.07 mm, and a polyolefin was used. The thickness of the synthetic resin layer from 0.03 mm to 0.05 mm
And then laminating both sides in the same way, including the base cloth, total 5
A layer stack was obtained.

Example 4 As a base fabric, a polypropylene short fiber spun yarn woven fabric DIN
8000 (24th pair x 24th pair / 49 x 39 pieces / 2.5
4 cm, basis weight 185 g / m ² ) was used. As an ethylene-based copolymer resin layer, Lexpar ET-224 (JPO's ethylene-based copolymer resin) 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 parts by weight PEX AOT-32 (Tokyo Ink antioxidant ) 1 part by weight PEX UVT-51 (Tokyo Ink weather resistance auxiliary agent) 2 parts by weight Catalloy KS-359P (San Aroma-made PP elastomer) as a polyolefin synthetic resin layer 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 parts by weight PEX UTV-51 (Tokyo Ink weathering aid) 2 parts by weight PEX-1338 (Tokyo Ink UV absorber) 2 parts by weight PPM ABT-15 (Tokyo Ink anti-blocking agent) 1 part by weight PPM AST- 42AL (Antistatic agent made by Tokyo Ink Co., Ltd.) 2 parts by weight of 2 layers coextrusion equipped with a T-die Laminate the two-layer film directly onto the backing using a crusher. At this time, the thicknesses of the ethylene-based copolymer resin layer and the polyolefin-based synthetic resin layer were adjusted to 0.09 mm and 0.03 mm, respectively, and a total of 0.12 mm of the film was directly formed on the surface of the ethylene-based copolymer resin layer. Laminate it so that it touches the cloth. By the same method, the back surface was also coextruded and laminated to obtain a laminated body having a total of 5 layers including the base cloth.

Example 5 As a base fabric, polypropylene long fiber woven fabric MS3112
(340d × 340d / 26 × 26 / 2.54cm,
A basis weight of 80 g / m ² ) was used. As an ethylene copolymer resin layer, Evaflex P-2805 (EVA resin manufactured by Mitsui DuPont Polychemical) 100 parts by weight PEX 6800A (white pigment manufactured by Tokyo Ink) 3 parts by weight PEX AOT-32 (antioxidant manufactured by Tokyo Ink) 1 part by weight As a polyolefin-based synthetic resin layer Catalloy KS-359P (San Aroma-made PP elastomer) 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 parts by weight PPM ABT-15 (Tokyo Ink anti-blocking agent) 1 2 parts by weight PPM AST-42AL (antistatic agent manufactured by Tokyo Ink Co., Ltd.) 2 parts by weight are directly laminated on a base fabric using a two-layer coextrusion apparatus equipped with a T-die. At this time, the thicknesses of the ethylene-based copolymer resin layer and the polyolefin-based synthetic resin layer were adjusted to 0.07 mm and 0.03 mm, respectively, and a total of 0.10 mm of the film was directly formed on the surface of the ethylene-based copolymer resin layer. Laminate it so that it touches the cloth. By the same method, the back surface was also coextruded and laminated to obtain a laminated body having a total of 5 layers including the base cloth.

Example 6 Polypropylene short fiber spun yarn woven fabric PP24 as a base fabric
85 (24th single x 24th single / 58 x 51 / 2.54c
m, basis weight 120 g / m ² ) in the same manner as in Example 5 to obtain a total of 5 layers of laminate including the base cloth with two layers of co-extruded T-die laminate on both sides.

Example 7 As a base fabric, polypropylene short fiber spun yarn woven fabric DIN
8000 (24th pair x 24th pair / 49 x 39 pieces / 2.5
4 cm, basis weight 185 g / m ² ) was used. As an ethylene copolymer resin layer, Evaflex P-2805 (EVA resin manufactured by Mitsui DuPont Polychemical) 100 parts by weight PEX 6800A (white pigment manufactured by Tokyo Ink) 3 parts by weight PEX AOT-32 (antioxidant manufactured by Tokyo Ink) 1 part by weight PEX UVT-51 (Tokyo Ink weather resistance auxiliary agent) 2 parts by weight As a polyolefin-based synthetic resin layer Catalloy KS-359P (San Aroma-made PP elastomer) 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 Part by weight PEX UTV-51 (Tokyo Ink weathering aid) 2 parts by weight PEX-1338 (Tokyo Ink UV absorber) 2 parts by weight PPM ABT-15 (Tokyo Ink anti-blocking agent) 1 part by weight PPM AST-42AL (Tokyo Ink Antistatic Agent) 2 parts by weight with T-die attached Laminating directly backing the two-layer film using a 2-layer co-extrusion apparatus - Tosuru. At this time, the thicknesses of the ethylene-based copolymer resin layer and the polyolefin-based synthetic resin layer were adjusted to 0.09 mm and 0.03 mm, respectively, and a total of 0.12 mm of the film was directly formed on the surface of the ethylene-based copolymer resin layer. Laminate it so that it touches the cloth. By the same method, the back surface was also coextruded and laminated to obtain a laminated body having a total of 5 layers including the base cloth.

Example 8 As a base fabric, polypropylene short fiber spun yarn woven fabric DIN
8000 (24th pair x 24th pair / 49 x 39 pieces / 2.5
4 cm, basis weight 185 g / m ² ) was used. As an ethylene-based copolymer resin layer in contact with the base cloth, Evaflex P-2505 (EVA resin manufactured by Mitsui DuPont Polychemical) 100 parts by weight Nipolon Z TZ-420 (LLDPE manufactured by Toso Corporation) 5 parts by weight PEX 6800A (Tokyo) Ink white pigment) 3 parts by weight PEX AOT-32 (Tokyo Ink antioxidant) 1 part by weight PEX UVT-51 (Tokyo Ink weathering aid) 2 parts by weight by T dilaminate method to a thickness of 0.12 mm. Was formed into a film and directly laminated on a base fabric. Further thereon, as a polyolefin-based synthetic resin layer, Catalloy KS-353P (San Aroma-made PP elastomer) 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 parts by weight PEX UVT-51 (Tokyo Ink weatherproofing agent) 2 parts by weight PEX-1338 (Tokyo Ink UV absorber) 2 parts by weight PPM ABT-15 (Tokyo Ink anti-blocking agent) 1 part by weight PPM AST-42AL (Tokyo Ink antistatic agent) 2 parts by weight LBT-100 (Sakai Chemical Lubricant) 0.2 part by weight is used to form a 0.09 mm-thick film by a calendering method, and the ethylene-based copolymer resin layer is directly laminated on the laminated surface. The back surface was also adhered in the same manner to obtain a laminated body having a total of 5 layers including the base cloth.

Comparative Example 1 Polyester long-fiber fabric T75123M as a base fabric
(250d × 250d / 30 × 30 / 2.54cm,
A basis weight of 70 g / m ² ) was used. The processing method is Example 1
The lamination was carried out in the same manner as described above to obtain a laminated body having a total of 5 layers including the base cloth.

Comparative Example 2 A polyester short fiber woven fabric SS2552 (2
A 0-thousand × 20-thousand / 56 × 50 pieces / 2.54 cm, a basis weight of 235 g / m ² ) was used. The processing method was the same as in Example 7 to obtain a laminate having a total of 5 layers including the base fabric.

Comparative Example 3 Polypropylene short fiber spun yarn woven fabric DIN8 as a base fabric
000 (24th pair × 24th pair / 49 x 39 pieces / 2.54
cm, basis weight 185 g / m ² ) was used. The layers were laminated in the same manner as in Example 7 to obtain a 5-layer laminate containing the base fabric.
At that time, the thicknesses of the ethylene-based copolymer resin layer and the polyolefin-based synthetic resin layer were 0.04 mm and 0.08 m, respectively.
After adjusting to m, coextrusion laminating was performed on both sides.

Comparative Example 4 As a base fabric, polypropylene short fiber spun yarn woven fabric DIN8
000 (24th pair × 24th pair / 49 x 39 pieces / 2.54
cm, basis weight 185 g / m ² ) was used. Everflex P-2505 (EVA resin manufactured by Mitsui DuPont Polychemical) 100 parts by weight PEX 6800A (white pigment manufactured by Tokyo Ink) 3 parts by weight PEX AOT-32 (antioxidant manufactured by Tokyo Ink) 1 part by weight PEX UVT-51 (Tokyo) Ink-made weatherproofing aid) 2 parts by weight is formed into a film having a thickness of 0.12 mm by the T-die laminating method and directly laminated on the base cloth, and the back surface is also laminated in the same manner to include the cloth. A layer stack was obtained.

Comparative Example 5 Polypropylene short fiber spun yarn woven fabric DIN8 as the base fabric
000 (24th pair × 24th pair / 49 x 39 pieces / 2.54
cm, basis weight 185 g / m ² ) was used. Catalloy KS-359P (San Aroma-PP elastomer) 100 parts by weight PEX 6800A (Tokyo Ink white pigment) 3 parts by weight PEX UTV-51 (Tokyo Ink weathering aid) 2 parts by weight PEX-1338 (Tokyo Ink) UV absorber) 2 parts by weight PPM ABT-15 (anti-blocking agent manufactured by Tokyo Ink) 1 part by weight PPM AST-42AL (antistatic agent manufactured by Tokyo Ink) 2 parts by weight having a thickness of 0.12 mm by a T-die laminating method. A film was formed and directly laminated on the base cloth, and the back surface was also laminated in the same manner to obtain a three-layer laminate including the base cloth. The contents of the above Examples and Comparative Examples are shown in Table 1, and the results of measurement or evaluation by the methods described below are summarized in Table 2.

[0026]

[Table 1]

[0027]

[Table 2]

Measuring Method (1) Surface Abrasion 1 ROTARY ABRATION TES manufactured by Toyo Seiki
The weight loss value of weight was measured by TER and JIS K-7024. Worn Wheel TABER INDUSTRYS TEST
WHEEL TABERH-1 load 500 g rotation speed 60 rpm number of times 1000
Rotation (2) Surface abrasion 2 DAIEI KAGAKU SEIKI MFG C
o. Loaded 500g, 300 times with LTD's RT200 Gakshin type dyeing fastness tester
A sand paper of JIS A-P100 was attached to the repetitive wear head portion, and the wear reduction value was measured. (3) Welder weldable Yamamoto Vinita YEN7000 bar size 5 cm
It welded using x24 cm. (4) Measurement of Welder Peeling Strength A material was prepared in the same manner as the sample tested for welder weldability, and was manufactured by Shimadzu Autograph AGS 100.
G Measured by JIS K6328-5.3.7 (5) Confirmation of molten state (recyclability) 100 g of the laminate was placed in two open rolls with a roll surface temperature set at 170 ° C. and kneaded for 10 minutes. . Recycleability was given to those with no abnormal appearance such as lumps, bubbles, and scrapes on the surface of the roll, and those with abnormal appearance were given to recycleability x.

Example 9 The laminate sheets produced in Examples 1 to 8 were recycled. In the case of recycling, the used sheet is actually used, but here, the laminated sheet produced in Examples 1 to 8 is used as it is, and the ear scraps during processing and anti-contamination. I used the beginning. 30mm x these
The material is roughly cut into a size of 100 cm or less, and is then crushed by a crusher "ZA561" manufactured by Horai Co., Ltd. to integrally crush the fabric and the resin. Furthermore, the primary crushed product is the company's high pelleter.
It was granulated by applying "HP120-PSC", and the granulated product was secondarily pulverized into pellets. The pellets are a mixture of a fiber portion and a resin portion, which are integrated, and when they are heated and melted in the next extruder, they are completely mixed to form a resin shape. The pellets are continuously extruded into a reticulated body using a reticulated body manufacturing apparatus manufactured by Ein Co., Ltd. This device is 60mmΦ
On the screw extruder, 1 on the surface of 60 mm x 1000 mm
This is an apparatus in which resin is extruded from a nozzle in which 603 holes each having a diameter of 10 mm are opened at a pitch of 10 mm and molded into 50 mm thick and 1000 mm wide in water. The processing conditions were cylinder temperature 200 to 240 ° C., die temperature 250 ° C., discharge rate 39 kg / hour, take-off speed 43 cm / min, 50 mm thickness × 1000 mm width × 2000 mm length, but weight 3.04 kg / m ² bulk density 0. The yield was 025 g / cc. These are reused as cushions.

As shown in the measurement and evaluation results in Table 1, the samples of Examples 1 to 8 were all welded by the welder (high frequency) weldability test, and the peel strength of the welded portion was also found. It is in a practically sufficient range of 55 to 93 N / 3 cm. The thickness ratio of the ethylene copolymer resin layer and the polyolefin-based synthetic resin layer of each sample of Examples 1 to 8 was 5 in the former case.
It is 7% or more. On the other hand, in Comparative Example 3 in which the ratio was 33%, the welder welding was difficult and the peel strength was 26 N /.
It is an insufficient value of 3 cm. In Comparative Example 5 having no ethylene-based copolymer resin layer, the welder did not substantially generate heat and could not be welded.

Two types of abrasion resistance measurements were made to evaluate the surface strength. The abrasion resistance is obviously improved in the other examples and comparative examples having the same resin layer as in Comparative Example 4 having no polypropylene resin layer on the surface.

Further, in the case of Comparative Examples 1 and 2 in which polyester long fibers or short fibers were used as the base fabric, a uniform molten state could not be obtained in the roll kneading test for evaluating the molten state (recyclability). In Examples 1 to 8, good melts were obtained, and in Example 9, the cushion material was actually formed as a recycled product.

[0033]

Industrial Applicability The laminate of the present invention was developed as a waterproof sheet that meets the social demands of protecting the global environment and reusing resources, and the materials used are olefin resin and fiber containing no chlorine. It is a product that is suitable for material recycling because the fiber base cloth and the coating layer can be melted together by using. In addition, the coating resin layer has a two-layer structure consisting of an inner layer of an ethylene-based copolymer resin and an outer layer of a polyolefin-based synthetic resin, so that the high-frequency welding sewability characteristic of conventional vinyl chloride resin-coated waterproof sheets can be achieved. The object of the present invention is to provide a product that satisfies the two requirements of the required surface strength.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshihiko Ibe             1-6-9, Hakurocho, Chuo-ku, Osaka             Bow Plus Co., Ltd. F-term (reference) 4F100 AJ01B AJ01D AK01B AK01D                       AK03A AK03C AK03E AK04B                       AK04D AK07A AK07C AK07E                       AK68B AK68E AK71B AK71E                       AL02C AL02E AT00A BA03                       BA05 BA06 BA07 BA10A                       BA10C BA10E BA25 DG01A                       DG12A DG13A EH23 EH232                       GB07 JL16

Claims (5)

[Claims] 1. A polyolefin-based synthetic fiber cloth as a base fabric, which has an ethylene-based copolymer resin layer in contact with the base fabric on at least one surface thereof, and further has a polyolefin-based synthetic resin layer on the outer surface thereof. Laminate. 2. The main component of the ethylene copolymer resin layer is:
Ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer The laminate according to claim 1, which comprises a copolymer composition obtained by blending one or more selected from a polymer, an ethylene-ethyl methacrylate copolymer, and a copolymer of ethylene and an unsaturated carboxylic acid. . 3. A propylene-α-comprising main component of a polyolefin-based synthetic resin layer is (1) a polypropylene block and (2) a copolymer elastomer block of propylene and an α-olefin having 2 to 12 carbon atoms. The laminate according to claim 1 or 2, which is an olefin block copolymer. 4. The ethylene-based copolymer resin layer and the polyolefin-based synthetic resin layer have a thickness ratio of 50 to 90% for the ethylene-based copolymer resin layer and 10 to 50% for the polyolefin-based synthetic resin layer. , The total thickness of both layers is 50-400μ
It is m, The laminated body in any one of Claims 1-3. 5. The polyolefin synthetic fiber cloth comprises a woven or knitted fabric of polypropylene fibers or a nonwoven fabric.
The laminated body according to any one of to 4.