JPH0849170A - Laying mat - Google Patents

Abstract

(57) [Summary] [Purpose] As a laying mat, there is little gas generation and smoke generation during combustion, there are no problems due to waste treatment, and it has excellent moldability in melt extrusion, and it is easily sheeted by a general extruder. In addition to being molded into a shape, it is less likely to deteriorate over time, has excellent durability, has good flexibility, and has good laying stability and appearance. [Structure] The backing layer provided on the back surface of the original carpet is a first homopolymer selected from a polypropylene homopolymer and an amorphous random copolymer with ethylene and / or butene-1 containing propylene as a main monomer. Resin component 10
2 to 50% by weight and a second resin component 10 to 50 made of a copolymer of ethylene and an α-olefin as a main monomer.
A standing mat formed of a resin composition containing, by weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor laying mat having a backing layer on the back surface of an original carpet, and more particularly to a floor laying mat suitable as a small second mat having flexibility for automobiles and households.

[0002]

2. Description of the Related Art Laying mats are carpet mats made of natural or synthetic fibers with a resin composition lining on the back side, and have good dustproof, soundproof, and vibration damping properties. Therefore, in addition to the line mat, it is often used as a piece-shaped mat that is laid at the feet of a driver or a passenger in an automobile to relieve fatigue and tension. In the conventional laid mat, as the above-mentioned resin composition for backing, one having polyvinyl chloride, synthetic rubber, ethylene / vinyl acetate copolymer and the like as a main component is used.

Of the above-mentioned conventional resin compositions for backing,
The polyvinyl chloride resin composition is most widely used because it is excellent in durability and flexibility, but it produces a large amount of harmful and corrosive hydrogen chloride gas when burned, and therefore, when burned in a waste treatment. However, there is a problem that not only causes health problems of workers and environmental pollution around the environment, but also corrodes the incinerator and accelerates deterioration. Further, the composition using synthetic rubber does not have the above-mentioned problem of gas generation,
Moldability is poor when a sheet is formed by melt extrusion to form a backing layer, and when a normal extruder such as a T-die is used, rubber is clogged at the exit of the molding machine due to gelation of rubber and heat generated at the compression part. Special extruders are required because they tend to cause structural failure. Therefore, there are problems that the equipment cost is high, the deterioration with time is large, and the durability is poor. Furthermore, a composition using an ethylene / vinyl acetate copolymer does not have the above-mentioned gas generation problem, but it is inferior in flexibility, so that it is difficult to follow the shape of the laying surface, and a good appearance cannot be obtained, and laying stability is stable. It had the disadvantage that it was also poor in sex.

On the other hand, in recent years, it has been proposed to use amorphous poly α-olefin for the backing layer of tile carpet (Japanese Patent Laid-Open No. 5-318674, etc.). This amorphous poly α-olefin has the advantage that the amount of smoke emitted during combustion and the amount of harmful gas produced are relatively small, but when it is used as the backing layer of a laid mat, the backing layer undergoes a high load. However, there was a problem that the strain and deformation of the material became remarkable and the tensile elasticity was large, so that the fitting property with the laid surface was poor.

The present invention has been made in view of the above-mentioned circumstances. It produces a small amount of gas and smoke during combustion, has no problems due to waste treatment, and has excellent moldability in melt extrusion, and is a general extruder. It is an object of the present invention to provide a laying mat which can be easily formed into a sheet by using the above method, has less durability over time, has excellent durability, and has good flexibility, and has good laying stability and good appearance.

[0006]

In order to achieve the above object, in the laid mat of the present invention, the backing layer provided on the back surface of the carpet material is an amorphous polypropylene homopolymer, ethylene containing propylene as a main monomer. Or / and 10 to 50% by weight of a first resin component selected from an amorphous random copolymer with butene-1 and a copolymer of α-olefin having ethylene as a main monomer. The gist is a resin composition containing 10 to 50% by weight of the second resin component.

In the backing layer of the laid mat of the present invention, the resin composition constituting the backing layer is composed of an amorphous polypropylene homopolymer and an ethylene or / and butene-1 amorphous random copolymer of propylene as a main monomer. It is composed of a first resin component selected from the combination and a second resin component made of an α-olefin copolymer containing ethylene as a main monomer, in a specific ratio. Since these resin components do not contain halogen, they do not generate a toxic and corrosive gas at the time of combustion and have a low smoke generation unlike those using conventional general-purpose polyvinyl chloride resin. Moreover, by the combination of the first and second resin components,
Since it has excellent flexibility and elasticity suitable for a standing mat and high shape retention strength, it does not cause distortion or deformation due to high load, and it has good weather resistance for ethylene and α-olefin copolymers. Exhibits excellent heat resistance and heat aging resistance, and exhibits excellent durability. Moreover, since the above resin composition has excellent moldability by melt extrusion, it can be easily formed into a sheet by a general extrusion molding machine such as a T-die, and the formed sheet is used as a backing layer to be directly pressure-bonded to the original carpet or By gluing through the intermediate adhesive layer, the standing mat can be easily manufactured.

In the laid floor mat of the present invention, the mixing ratio of the first and second resin components may be changed,
By using each component having different basic characteristics, the flexibility and elasticity of the backing layer can be adjusted, and the backing layer can be thermoformed by post-processing to change the shape of the lower surface of the backing layer to that of the underlying surface. It is also possible to match the shape.

In the present invention, the first resin component is
Specific amorphous poly α-olefin (APAO), specifically amorphous polypropylene homopolymer, propylene
At least one polymer selected from an amorphous random copolymer of ethylene, an amorphous random copolymer of propylene / butene-1 and an amorphous random copolymer of propylene / ethylene / butene-1. Consists of. This polymer is
For example, it is obtained by copolymerizing each monomer in a hydrogen gas atmosphere using a titanium-based catalyst supported on magnesium chloride and alkylaluminum, and each monomer has a polymer structure in which they are randomly arranged. The crystallinity was 10% or less as measured by crystallization behavior by a scanning scanning calorimeter (DSC method), which is extremely low as compared with ordinary polyolefins.

In the present invention, the first resin component is
It is necessary to set the content of the backing layer in the resin composition to 10 to 50% by weight, and it is desirable to set the lower limit value to 20% by weight or more and the upper limit value to 40% by weight or less.
If this content is less than 10% by weight, the melt viscosity of the blend becomes excessively high, making it difficult to knead the blend as a backing material or form a sheet by a T-die extrusion molding machine, and to make the backing layer flexible. It is not preferable because it deteriorates the elasticity and elasticity. On the other hand, if it exceeds 50% by weight, the melt viscosity of the composition as the backing material becomes excessively low, which makes it difficult to carry out the sheet take-up operation at the time of forming the sheet and accompanies creep deformation of the backing layer under high load conditions. Distortion and deformation will appear remarkably, which is not preferable.

As the first resin component, the melt viscosity at 190 ° C. is 10 ² to 10 ⁵ centipoise, 230
Melt flow rate (MF at 2.16 kgf
It is preferable to use those having R) of 1000 or more, and particularly those having a number average molecular weight of 1,000 to 20,000. That is, if the number average molecular weight is less than the above specified value, the cohesive force becomes insufficient, it is difficult to obtain sufficient strength as the backing layer, and conversely, if the number average molecular weight exceeds the above specified value. However, the melt viscosity becomes excessively high, which makes it difficult to perform a kneading operation of the compound as a backing material or sheet formation by a T-die extrusion molding machine, which is not preferable.

Further, it is desirable to use a propylene content of 40% by weight or more in the first resin component, and it is preferable to use a propylene content of the following olefins. That is, when a propylene / ethylene copolymer is used as the first resin component, the ethylene content is 40% by weight or less, and more preferably the ethylene content is 1 to
It is preferable to use 40% by weight and the balance propylene. Further, when a propylene / butene-1 copolymer is used, it is preferable to use a butene-1 content of 70% by weight or less, more preferably a butene-1 content of 10 to 70% by weight with the balance being propylene. Further propylene / ethylene /
In the case of butene-1 copolymer, the ethylene content is 40% by weight or less and / or the butene-1 content is 70% by weight or less,
More preferably, the ethylene content is 1 to 40% by weight or / and the butene-1 content is 10 to 70% by weight and the balance is propylene. When the ethylene content is less than 1% by weight or the butene-1 content is less than 10% by weight, it is difficult to obtain sufficient flexibility and elasticity as the backing layer, and conversely, the ethylene content is decreased. Is more than 40% by weight or the butene-1 content is more than 70% by weight, the surface tackiness of the resin composition as a backing material may be excessively large, which deteriorates handleability, which is not preferable. .

In the present invention, as the second resin component, a resin composed of a copolymer with ethylene as a main monomer and an α-olefin is used. For example, an amorphous random copolymer of ethylene and at least one α-olefin selected from propylene, butene-1, hexene-1, 4-methylpentene-1, and octene-1 is preferably used. Among them, from the viewpoints of the effect of imparting flexibility and elasticity and the extrusion moldability, among them, the content of ethylene as a main monomer is 50 to 99% by weight and the content of α-olefin as a comonomer is 50 to 1% by weight. The polymer can be more preferably used, and particularly, those having a melt flow rate (MFR) at 230 ° C. and 2.16 kgf of 0.1 to 20 and a melt viscosity at 190 ° C. of 10 ⁵ to 10 ⁸ centipoise are more preferable. Those having a melt viscosity of 10 ⁶ centipoise or more can be used, and more preferably can be used.

Those which satisfy these conditions and are readily available on the market at present are binary copolymers of ethylene and propylene (EPR or EPM), ethylene, propylene and diene compounds (for example, 1,4-hexadiene, diene). Random terpolymer of cyclomentadiene etc. (EPD)
M), a binary copolymer of ethylene and butene-1 (EB
M), and very low density polyethylene (VLD / PE) composed of a binary copolymer of ethylene and octene-1 can be exemplified.

In the resin composition of the backing layer in the present invention, in addition to the above first and second resin components, a third resin component comprising a crystalline polyethylene resin and / or a crystalline polypropylene resin is contained. Preferably. As the third resin component, polyethylene homopolymer,
Examples of suitable polypropylene homopolymers, random or block copolymers of ethylene and propylene having an ethylene content of 1 to 99% by weight (particularly 1 to 10% by weight), and the like, further, melt flow rate at 230 ° C. and 2.16 kgf. Those having a (MFR) of 0.1 to 45 and a melt viscosity at 190 ° C. of 10 ⁵ to 10 ⁸ centipoise are preferable, and a melt viscosity of 10 ⁶ or more is particularly preferable.

Of the third resin components, ethylene-based ones are excellent in compatibility with the first and second resin components and, when used, have sufficient flexibility for the mat products to be produced. Also, elasticity can be imparted. On the other hand, when a propylene-based material is used, appropriate strength can be imparted to the manufactured mat product. Therefore, it is preferable that the ethylene-based one and the propylene-based one are appropriately used and mixed depending on the application of the mat product to be produced.

The third resin component is contained in the resin composition of the backing layer in an amount of 20% by weight from the viewpoint of flexibility and elasticity.
Below, preferably 1 to 20% by weight, more preferably the lower limit value is 5% by weight or more and the upper limit value is 18% by weight or less.

In the present invention, the resin composition of the backing layer is added in addition to the above-mentioned first to third resin components in order to improve the economical efficiency, moldability, sound insulation and rigidity, and further the effect of increasing the filling amount. It is desirable to include an agent. As a filler,
For example, calcium carbonate, magnesium carbonate, magnesium sulfate, magnesium hydroxide, aluminum hydroxide, glass powder and the like used in ordinary resin molding techniques can be used. Among them, calcium carbonate is particularly preferable from the viewpoints of economy and molding processability. Is recommended as the main component.

The content of this filler in the resin composition is 8
It is preferable that the content is 0% by weight or less, preferably the lower limit value is 10% by weight or more and the upper limit value is 60% by weight or less. If the content is too large, the melt viscosity of the compound as the backing material increases, and Becomes difficult, and as a backing layer,
The strength may decrease. If the content is too small, including the case where the filler is not included, there is a problem in economic efficiency, but the performance as the backing layer is not affected.
The filler has an average particle size of 1.0 to 100 μm, preferably a lower limit value of 5.0 μm or more and an upper limit value of 5
If it is too small, the melt viscosity of the composition as the backing material increases and molding processing becomes difficult, and if it is too large, the surface of the backing layer becomes rough. Therefore, the appearance may deteriorate.

Further, in the present invention, various additives such as an anti-adhesive agent and a colorant may be appropriately blended as necessary in addition to the above three resin components and the filler. Among the additives, the anti-adhesive agent removes the tackiness of the surface of the backing layer to improve the handling property of the laid mat, and specific preferred examples thereof include silicone oil, silica, stearic acid and its derivatives. Can be mentioned. The blending amount of each of these is preferably 10% by weight or less in the resin composition. For example, when the amount of silicone exceeds 10% by weight, the backing layer surface easily bleeds, and when the amount of silica exceeds 10% by weight, The melt viscosity of the resin composition increases, resulting in deterioration of moldability, and the strength of the backing layer also decreases. In addition, the compounding amount in which the action of removing tackiness is substantially recognized is 0.0 for silicone.
It is 1% by weight or more, and silica is 0.1% by weight or more.

As the coloring agent, any coloring raw materials and dyes can be used directly or as a masterbatch, and the pigment having a color tone to be imparted is 0.1 or less in consideration of coloring degree and economical efficiency.
It is preferable to blend in the range of up to 5% by weight. Many backing layers are black, and it is customary to use carbon black as a masterbatch.

In the present invention, a resin composition comprising the above-mentioned first and second resin components and a third resin component, a filler and an additive optionally blended, is used, for example, by the following method. To get a laid mat. That is, the above resin composition is mixed with an appropriate mixer such as a Henschel mixer or a Banbury mixer, and the mixture is used as a backing material, or the mixture is pelletized to be a backing material. Alternatively, the resin composition is mixed with a mixer such as a tumbler blender, and the mixture (dry blend pellets) is used as a backing material.

Then, using a single-screw or twin-screw extruder equipped with a coat hanger die, etc., the above-mentioned backing material,
At a temperature of 130 to 200 ° C., a width of 400 to 2000 mm,
A resin molding sheet for backing having a thickness of 0.5 to 3 mm is extruded. Then, before the sheet is cooled and solidified, the back surface of the original carpet is continuously covered as a backing layer with a pressure roll or the like installed adjacent to the exit of the coat hanger die to obtain a laid mat. Alternatively, the extruded backing resin sheet is cooled and solidified, and then adhered as a backing layer to the back side of the carpet raw material with an adhesive or the like, or one side of the resin sheet is heated and melted and the fused surface is used as the carpet raw sheet. Adhere to the backside of to obtain a standing mat.

The resin composition used for forming the backing layer has a melt viscosity at 190 ° C. in the range of 10 ⁵ to 10 ⁶ centipoise, and particularly preferably 2 × 10 ⁵ to 4 × 10 ⁵ by adjusting the compounding ingredients. It is good to adjust to be centipoise. If the melt viscosity is too high, the film-forming property at the time of extrusion is deteriorated and it becomes difficult to form it into a sheet.
The MFR of the resin composition (190 ° C, 2.160 kg
f) is preferably about 5 to 50.

On the other hand, in the case where the backing resin sheet is adhered to the carpet original fabric with an adhesive as described above, the adhesive is not particularly limited, but a hot-melt type adhesive and an emulsion type adhesive are suitable. Can be used. The former hot melt adhesives include polypropylene, polyethylene, ethylene vinyl acetate copolymer, ethylene
Examples thereof include vinyl acetate-based modified resins, and polypropylene and polyethylene are particularly preferable in terms of affinity with the resin component of the backing layer. Emulsion type adhesives include ethylene / vinyl acetate copolymer emulsion, SB
R latex and the like are preferable.

[0026]

EXAMPLES Examples related to the present invention and comparative examples for deriving the effects thereof will be described below. In this example, "%" means "% by weight".

<Description of Raw Materials> The following raw materials were prepared for carrying out Examples and the like.

1. First resin component APAO (1) ... Amorphous random copolymer of propylene and ethylene (manufactured by Ube Lexen, number average molecular weight 150)
00, 190 ℃ melt viscosity 8500 centipoise, MFR
3750, propylene content 95%, ethylene content 5%) APAO (2) ... Amorphous random copolymer of propylene and ethylene (manufactured by Ube Lexen, number average molecular weight 150)
00, 190 ℃ melt viscosity 8500 centipoise, MFR
3750, propylene content 85%, ethylene content 15
%) APAO (3) ... Amorphous random copolymer of propylene butene-1 (manufactured by Ube Lexen, number average molecular weight 13)
000, 190 ℃ Melt viscosity 8000 centipoise, MF
R4000, propylene content 62%, butene-1 content 3
APAO (4) ... Amorphous polypropylene homopolymer (manufactured by Ube Lexen, number average molecular weight 12,000, 190)
℃ melt viscosity 8000 centipoise, MFR4000, propylene content 100%) ・ APAO (5) ... Propylene ethylene butene-1
Amorphous random copolymer of (number average molecular weight 13000,
190 ° C melt viscosity 8000 centipoise, MFR375
0, propylene content 70%, ethylene content 10%, butene-1 content 20%) 1. Second resin component-EPR ... ethylene-propylene rubber (manufactured by Japan Synthetic Rubber Co., Ltd., ethylene content 78%, 190 ° C melt viscosity of 500,000 centipoise or more, MFR 0.8) -EBM ... ethylene-butene-1 copolymer ( Mitsui Petrochemical Co., Ltd., ethylene content 85%, 190 ° C melt viscosity 50
10,000 centipoise or more, MFR 3.6) VLD / PE ... Ethylene octene-1 copolymer (manufactured by Dow Chemical Co., ethylene content 75%, 190 ° C. melt viscosity 500,000 centipoise or more, MFR 5.0) 3. Third resin component-Crystalline PP ... Crystalline polypropylene (manufactured by Ube Industries,
Ethylene content 4.0%, 190 ° C. melt viscosity 500,000 centipoises or higher, MFR 11.0) Crystalline PE: crystalline low density polyethylene (manufactured by Ube Industries, 190 ° C. melt viscosity 500,000 centipoises or higher, MF)
R 0.8) 4. Other resins-PVC ... Polyvinyl chloride-EVA ... Ethylene / vinyl acetate copolymer (Toray DuPont) -SBS ... Styrene-butadiene thermoplastic elastomer (Nippon Synthetic Rubber Co., Ltd.) Fillers and additives-Calcium carbonate (Nitto Koka Co., Ltd., average particle size 7.41)
μm) -Silicone (manufactured by Toray Dow Corning Silicone Co., Ltd.)-Silica (average particle size 190 μm) -Pigment (carbon black) <Example 1>

[Table 1] As shown in Table 1 above, APAO (1) 30%, EPR3
A mixture of 0% and 40% calcium carbonate was mixed and stirred by a kneader at 200 ° C for 15 minutes, and the mixture was mixed with 2
It was molded by a hot press at 00 ° C to obtain a backing sheet having a thickness of 2 mm.

Then, one side of the backing sheet is attached to 20
It was heated on a hot plate at 0 ° C. for 5 minutes, and the heated and melted surface was attached to the back surface of the polyester fiber carpet raw material to obtain a laid mat having a size of 500 mm × 500 mm.

Example 2 EBM as the second resin component
A laid mat was obtained in the same manner as above except that the above was used.

Example 3 VLD as the second resin component
A mat was obtained in the same manner as above except that / PE was used.

<Embodiment 4> APAO (1) 45%, EP
A mat containing R15% and calcium carbonate 40% was used to obtain a mat in the same manner as above.

<Example 5> APAO (1) 15%, EP
A mat was obtained in the same manner as above using a mixture of R45% and calcium carbonate 40%.

<Example 6> APAO (1) 50%, EP
A mat containing R50% was used to obtain a mat in the same manner as above.

<Embodiment 7> APAO (1) 30%, EP
A mat was obtained in the same manner as above using a mixture of R15%, crystalline PE (third resin component) 15% and calcium carbonate 40%.

<Embodiment 8> APAO (2) 26%, EP
A mat was obtained in the same manner as above using a mixture of R24%, crystalline PE 10% and calcium carbonate 40%.

<Example 9> APAO (1) 29%, EP
R2 0.5%, crystalline PP (third resin component) 8%, calcium carbonate 40%, silicone 1%, silica 1%, pigment 0.5% was used to obtain a mat in the same manner as above. It was

<Example 10> APAO (3) 31%, E
A mat was obtained in the same manner as above using a mixture of PR22.5%, crystalline PP (third resin component) 4%, calcium carbonate 40%, silicone 1%, silica 1% and pigment 0.5%. It was

<Embodiment 11> APAO (4) 30%, V
A mat was obtained in the same manner as above using a mixture of 35% LD / PE and 35% calcium carbonate.

<Embodiment 12> APAO (4) 20%, V
LD / PE 35%, crystalline PE 5%, calcium carbonate 4
A mat was obtained in the same manner as above by using a mixture containing 0%.

<Example 13> APAO (5) 30%, E
A mat containing 30% PR and 40% calcium carbonate was used to obtain a mat in the same manner as above.

<Example 14> APAO (5) 20%, E
PR 30%, crystalline PE 10%, calcium carbonate 40%
A mat was obtained in the same manner as above by using a mixture of

<Comparative Example 1>

[Table 2] As shown in Table 2 above, a mat containing 60% of APAO (1) and 40% of calcium carbonate was used to obtain a mat in the same manner as above.

<Comparative Example 2> EP in place of APAO (1)
A mat was obtained in the same manner as in Comparative Example 1 except that R was used.

<Comparative Example 3> A mat was obtained in the same manner as above using a mixture of 30% APAO (1), 30% crystalline PE and 40% calcium carbonate.

Comparative Example 4 Crystalline P instead of crystalline PE
A mat was obtained in the same manner as in Comparative Example 3 except that P was used.

<Comparative Example 5> A mat was obtained in the same manner as above using a mixture of 60% EVA and 40% calcium carbonate.

<Comparative Example 6> A mat was obtained in the same manner as Comparative Example 5 except that SBS was used instead of EVA.

Comparative Example 7 Using PVC, a mat was obtained in the same manner as above.

<Comparative Example 8> A mat was obtained in the same manner as above by using a mixture of 55% EVA and 45% calcium carbonate.

<Comparative Example 9> A mat was obtained in the same manner as above using SBS.

<Evaluation> The following measurements were carried out in each of the above-mentioned standing mats or the manufacturing process thereof to evaluate the main characteristics.

1. Extrudability In general, the larger the average required torque (kg · cm) when stirring the backing raw material with a kneader, the poorer the extrudability, and the smaller the average torque, the better the extrudability. Therefore, the above average required torque is measured, and it is judged from the measured value that a good extrusion moldability is indicated by "○",
The bad ones were evaluated as "x", and the ones that were difficult to say but difficult to form were evaluated as "△".

2. Heat deterioration resistance during melt-kneading Judging from the color change after stirring with a kneader, those with no color change and excellent heat deterioration resistance are indicated by "○", and those with a slight change in color and slightly deteriorated heat resistance. "C" was evaluated as "x", and the case where the color change was remarkably exhibited and the heat deterioration resistance was poor was evaluated as "x".

3. Strength and Flexibility A 2 mm-thick backing sheet obtained by hot pressing at 200 ° C., in accordance with JIS K7113 “Plastic tensile test method”, has a tensile breaking strength (kg · f / cm ² ) at 23 ° C. and Tensile modulus (kg ・ f / c
m ² ) was measured. And those with high tensile fracture strength are said to have excellent durability, those with good durability are marked with "○", those with poor durability are marked with "×", and those that are not bad but are marked with "△". Evaluated as. Further, those having a small tensile elastic modulus have excellent flexibility, and those having good flexibility are marked with "○", those having poor flexibility are marked with "x", and those having insufficient flexibility are marked with "△". evaluated.

4. Flammability NBS (National Bureau of
Standards) A flammability test based on the flammability test was performed to confirm the presence or absence of smoke and the type and amount of smoke.
Then, based on the results, those having good combustibility were evaluated as “◯”, those having poor combustibility were evaluated as “x”, and those which were not so bad but were insufficient were evaluated as “Δ”.

The evaluation results of the above characteristics are also shown in Tables 1 and 2 above.

<Evaluation Results> As is clear from the above table, the laid mats of the examples related to the present invention are excellent in all characteristics, whereas the laid mats of the comparative examples deviating from the gist of the present invention. Laying mats are inferior to either property.

[0059]

As described above, according to the laying mat of the present invention, the lining mat has excellent flexibility and elasticity, does not cause distortion or deformation of the backing layer due to high load, and has good laying stability. It has a good appearance, good weather resistance and heat aging resistance, and has good durability.Because it does not generate toxic gas during combustion and has low smoke emission, there is no problem in incineration treatment when it is discarded. Moreover, the resin composition constituting the backing layer is excellent in moldability by melt extrusion, and the backing layer is
It can be easily formed by a general extrusion molding machine such as a die, has good production efficiency, and the degree of flexibility and elasticity can be adjusted, and the underside shape of the backing layer is the underlying surface shape. The effect that it can be post-processed according to is obtained.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshio Nishihara, Yoshinobu Nishihara, 3-chome, Chikkoshinmachi, Sakai City, Ube Lexen Co., Ltd. (72) Kenbun, Taga, 3-chome, Tsukikoshinmachi, Sakai City, Ube Lexen Co., Ltd.

Claims (8)

[Claims] 1. The backing layer provided on the back surface of the original carpet is selected from an amorphous polypropylene homopolymer and an amorphous random copolymer of ethylene and / or butene-1 containing propylene as a main monomer. First resin component 1
It is characterized by comprising a resin composition containing 0 to 50% by weight and 10 to 50% by weight of a second resin component consisting of a copolymer of ethylene and an α-olefin as a main monomer. Laying mat. 2. The resin composition of the backing layer contains 1 to 20% by weight of a third resin component composed of a crystalline polyethylene resin and / or a crystalline polypropylene resin. Laying mat. 3. The first resin component has a propylene content of 30% by weight or more, the ethylene content of the first resin component containing ethylene is 1 to 40% by weight, and the first resin component contains butene-1. The butene-1 content of the resin component of 10-70
The laid-down mat according to claim 1 or 2, which is in a weight percentage. 4. The laid mat according to claim 1, wherein the first resin component has a melt viscosity at 190 ° C. of 10 ² to 10 ⁵ centipoise. 5. The second resin component is ethylene 50 to 50.
99% by weight, propylene, butene-1, hexene-
The laid mat according to any one of claims 1 to 4, which comprises a copolymer with 50 to 1% by weight of an α-olefin selected from 1,4-methylpentene-1 and octene-1. 6. The laid mat according to claim 1, wherein the second resin component has a melt viscosity at 190 ° C. of 10 ⁵ to 10 ⁸ centipoise. 7. The laid mat according to claim 2, wherein the third resin component is selected from polyethylene homopolymers, polypropylene homopolymers, and random or block copolymers of ethylene and propylene. 8. The laid mat according to claim 2, wherein the third resin component has a melt viscosity at 190 ° C. of 10 ⁵ to 10 ⁸ centipoise.