JPH0830309B2 - Backing material composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention is excellent in flexibility, dimensional stability, and cutting property.
The present invention relates to a backing material composition having good shape following property.

"Prior Art" Currently, backing materials are roughly classified into two types: a latex compound mainly composed of natural rubber or synthetic rubber, or a heat-fusion type compound mainly composed of a thermoplastic resin.
These backing materials have been used mainly for the purpose of fixing a fibrous or porous base material such as carpet from the back surface thereof in recent years, but in recent years, the use of backing processed products has been diversified and a softer feeling, With the need for a heavier material or functions with emphasis on usability such as vibration control, soundproofing, and sound insulation, the backing layer itself is inevitably shifting to higher wall thickness and higher specific gravity. is there.

Therefore, the flexibility that influences the size, shape stability, fit to the floor, and shape-following ability, which are the basic elements of bedding materials, which are the main applications of backing processed products, are more important than ever before. Has become. In particular, in recent years, such high functionality has been recognized, and in tile carpets where the amount of use has increased significantly, these basic elements are the most important factors that affect the quality of the product, and it is said that the backing material determines all of the product. But it's not an exaggeration. The problems faced by the backing material will be described below using this tile carpet as an example.

That is, the tile carpet is a flat plate-shaped carpet cut into a relatively small area shape, and by combining various shapes and colors of the carpet, a pattern that suits the user's preference can be selected. It is easier to transport, carry in, or construct than a standard carpet, and can be locally repaired, cleaned, or replaced even if it is locally worn or soiled. It is used as a material.

However, in recent years, offices have become more OA, and for indoor wiring, flat cables have been installed on the floor surface, and the floor shape has become complicated. For example, tile carpets using conventionally known backing materials are functionally compatible. Various difficult problems are occurring. Specifically, when the flat cable or the like is projected on the floor surface, the backing material does not have sufficient flexibility or shape conformability, so the tile carpet does not adhere sufficiently to the floor surface, and there is a difference in level between carpet carpets. There is a problem in terms of aesthetics and safety such that a gap is generated, or a component of the backing material composition erodes and contaminates the material covering the flat cable or the floor surface itself.

Further, in recent years, even in general households, westernized houses have been developed, and attention is being paid to tile carpets as in Western countries. However, conventionally known backing materials have insufficient dimensional stability during manufacture or use thereof. Therefore, it is necessary to insert a fiber material such as a non-woven fabric or a glass mat between the layers constituting the tile carpet or the bottom layer, and the carpet structure or the manufacturing method is complicated, which is a problem in terms of economical efficiency. Since it has a built-in fiber material layer, when general consumers want to cut into complicated shapes such as curved surfaces, it is very difficult to cut, and there is a problem in cutability, which hinders its spread to general households. It has various drawbacks.

[Problems to be solved by the invention]

As a result of various studies to solve the problems of the above-mentioned conventional backing materials, the inventors have blended a thermoplastic elastomer with a filler and a softening agent having a specific shape, and added special consideration to the composition. It was found that a backing material composition excellent in flexibility, dimensional stability, cutting property and shape-following property was obtained, and arrived at the present invention.

[Means for solving problems]

That is, the present invention has a vinyl bond content of (A) (A) of 70
%, The crystallinity is 5% or more, and the intrinsic viscosity [η] (measured in toluene at 30 ° C.) is 0.5 dl / g or more 1,2-polybutadiene, styrene-butadiene block copolymer, hydrogenated styrene- Butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-isoprene copolymer, ethylene-propylene elastomer, styrene-grafted ethylene-propylene elastomer, thermoplastic polyester elastomer, ethylene-based ionomer resin, ethylene-butene copolymer 10 to 70% by weight (B) fibrous material of at least one thermoplastic elastomer selected from a polymer, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer, a thermoplastic polyamide elastomer, and a thermoplastic polyurethane elastomer. / Or scaly packing 5-95 weight And other fillers from 5 to 95 weight%
There is provided a backing material composition comprising 20 to 90% by weight of a filler consisting of and (C) a softening agent of 0 to 60% by weight.

 The present invention will be described in more detail below.

[Structure of Invention]

The thermoplastic elastomer (A) used in the present invention has a vinyl bond content of preferably 70% or more, more preferably 85% or more, and a crystallinity of preferably 5% or more, further preferably 10%. ~ 40% aromatic vinyl such as 1,2 polybutadiene, styrene-butadiene block copolymer, hydrogenated styrene-butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-isoprene-block copolymer -Conjugated diene-based block copolymer, ethylene-propylene elastomer, styrene-grafted ethylene-propylene elastomer, thermoplastic polyester elastomer, ethylene-based ionomer resin, ethylene-butene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid Ethyl copolymer,
Examples include thermoplastic polyamide elastomers and thermoplastic polyurethane elastomers.

The aromatic vinyl-conjugated diene block copolymer includes
AB type, ABA type, ABA 'type, taper type, radial teleblock type, etc. are included. These thermoplastic elastomers are used alone or in combination of two or more. Among these, 1,2 polybutadiene (b-1), aromatic vinyl-conjugated diene block copolymer (b-2) and ethylene-vinyl acetate copolymer (b-3) are preferable. Preferred are (b-1) and (b-2). Particularly preferably (b
It is a mixture of -1) / (b-2). Further, these thermoplastic elastomers may be used in combination of two or more kinds.

In the present invention, the filler to be blended with the thermoplastic elastomer (A) is 5 to 95% by weight of fibrous and / or flaky filler, and 5 to 95% by weight of other fillers, preferably Fibrous and / or flake shaped fillers may be used in combination of 10 to 90% by weight and other fillers in an amount of 10 to 90% by weight, respectively, in combination.

When the blending ratio of the fibrous and / or scaly filler exceeds the above range, sufficient effects cannot be obtained for dimensional stability, flexibility, cutting property or shape and followability which are the objects of the present invention. In particular, the workability of the backing material is significantly reduced, which is not preferable.

Among the fillers, the fibrous or flaky filler is preferably a filler having a cross-sectional diameter or thickness of 0.1 m.
An inorganic or organic filler having a length of m or less and a length of preferably 3 times or more of the diameter or thickness, and other common names include ribbon-shaped fillers, plate-shaped fillers, flake-shaped fillers and the like. There is no particular restriction on the common name.

Among the fillers, fibrous or flaky fillers include glass fibers, surface-treated glass fibers, stainless fibers, aluminum fibers, potassium titanate fibers, carbon fibers, Kepler fibers, calcium sulfate, red iron oxide, and yellow oxide. Iron, halloysite natural and synthetic fibers, asbestos, wollastonite, sepiolite, zeolite,
Synthetic silica fiber, kaolin, talc, graphite,
Examples thereof include glass frames, aluminum flakes, aluminum diboride, limestone, mica, vermiculite, molybdenum disulfide, zeolite, kaolinite, sericite, bentonite, and natural scaly graphite.

Further, other fillers are not particularly limited as long as they are used in the carpet backing material. Generally, calcium carbonate, magnesium carbonate,
White carbon, barium sulfate, diatomaceous earth, silica sand,
Examples include powdery, granular, or hollow spherical inorganic and organic fillers such as glass spheres and beads.

The above fibrous or flaky filler or other fillers can be used in combination of two or more depending on the purpose.

Examples of the (C) softening agent used in the present invention include process oils (aromatic type, naphthene type, paraffin type),
Petroleum-based softeners such as lubricating oil, paraffin, liquid paraffin, petroleum asphalt, and vaseline; coal tar-based softeners such as coal tar and coal tar bitch; fatty oil-based softeners such as castor oil, linseed oil, rapeseed oil, and coconut oil ; Tall oil; sub; waxes such as beeswax, carnauba wax and lanolin; fatty acids and fatty acid salts such as ricinoleic acid, palmitic acid, barium stearate, calcium stearate, zinc laurate; synthetic polymer substances such as petroleum resin be able to.

The blending amount of (A), (B) and (C) is (A) /
(B) / (C) = 10 to 70/20 to 90/0 to 60 /, but preferably 10 to 50/30 to 80/5 to 60.

If the amount of (A) is less than 10% by weight, the strength of the backing layer will be insufficient, and it will be difficult to obtain excellent shape following property or good cutting property. When the amount of (A) exceeds 70% by weight, it is difficult to obtain excellent dimensional stability of the backing layer and the workability such as cutting property is deteriorated, which is not preferable from the economical viewpoint.

If the amount of (B) is less than 20% by weight, excellent dimensional stability and cuttability cannot be obtained, and if it exceeds 90% by weight, sufficient strength cannot be obtained and the cuttability becomes poor, and flexibility is high. Since the property is significantly impaired, the shape following property is deteriorated.

When the amount of (C) exceeds 60% by weight, the strength and thermal properties of the backing layer are deteriorated and the dimensional stability and permanent deformation resistance are impaired, which is not preferable.

In the composition within the above range, a composition suitable as a backing material can be obtained.

Incidentally, the carpet backing material composition of the present invention, other known polymers as compounding agents depending on the purpose, plasticizers, activators, dispersants, tackifiers, colorants, foaming agents, foaming aids, A lubricant, an antiaging agent, a crosslinking agent, and other additives can be used in combination.

Other known polymers include polybutadiene, butadiene-styrene copolymer, acrylonitrile-butadiene copolymer, polyisoprene, diene rubber such as natural rubber, acrylic rubber, chlorinated butyl rubber, olefin such as chlorinated polyethylene. Rubber, isotactic and atactic polypropylene polyethylene, polyvinyl chloride, polycarbonate, PET, PBT, polyacetal,
Polyamide, epoxy resin, PPS resin, polyether-
Ether ketone, PPO resin, styrene-methyl methacrylate copolymer, styrene-maleic anhydride copolymer, rubber modified PPO resin, styrene-maleimide copolymer, rubber modified styrene-maeimide copolymer, polysulfone, Can be mentioned.

Plasticizers such as phthalic acid ester-based, adipic acid ester-based, sebacic acid ester-based, and phosphoric acid-based adhesives, and tackifiers such as coumarone indene resin and terpene
Inorganic and organic pigments as coloring agents such as phenol resin and xylene / formalin resin, and sodium bicarbonate, ammonium bicarbonate, sodium carbonate, ammonium carbonate, azodicarbonamide, dinitropentamethylenetetramine, dinitrosoterephthale as coloring agents. Examples thereof include amide, azobisisobutyronitrile, barium azodicarboxylic acid, sulfonyl hydrazide, and toluene sulfonyl hydrazide.

Examples of the lubricant include aliphatic hydrocarbons such as paraffin wax, polyethylene wax, polypropylene wax, capric acids, uraric acid, myristic acid, palmitic acid, higher fatty acids such as margaric acid, stearic acid, arachidic acid, behenic acid, and the like. Metal salts of lithium salts, calcium salts, sodium salts, magnesium salts, potassium salts, etc., fatty alcohols such as palmityl alcohol, cetyl alcohol, stearyl alcohol, capronic amides, capric acid amides, capric acid amides, lauryl Fatty acid amides such as acid amide, myristic acid amide, palmitic acid amide, stearic acid amide, esters of fatty acid and alcohol, fluoroalkylcarboxylic acid or metal salt thereof, fluoroalkyl Fluorine compounds such as sulfonic acid metal salts.

As the cross-linking agent, sulfur, a sulfur compound such as dipentamethylene thiuram tetrasulfide, dicumyl peroxide, 1,1'-di- (o-butylperoxy) -3,3,5-trimethyldichlorohexane, di- Peroxides such as (t-butylperoxy) diisopropylbenzene and 2,5-dimethyl-2,5-di- (t-butylperoxy) hexane, P-quinonedioxime, P, P'-dibenzoylquinonedioxime and the like. The oxime compound and the like can be used alone or in combination.

There is no particular limitation on the method of mixing the above-mentioned (A) to (C) and other polymer materials or additives, and a mixing method used for general rubber compounds such as Banbury type mixer, pressure kneader and open roll, or A method such as a uniaxial or biaxial screw kneading extruder is used. As the premixing, a mixing method using a tumbler, a Henschel mixer or the like can be used.

The backing material composition thus obtained is lined on a fibrous base material and, if necessary, cut or punched to produce a tile carpet. The backing material composition of the present invention has a temperature of 80 ° C to 190 ° C, preferably 100 ° C to 190 ° C.
Since it is easy to process at a relatively low processing temperature of 170 ° C, it is not necessary to set any particular restrictions on the lining method.
A method in which a sheet that has been formed to the required thickness is attached to a fibrous base material with a viscous adhesive and backed, and a sheet that has been melt-sheeted with a T-die extruder or calendar roll is continuously used as a fibrous base material. A lining method that is commonly used, such as a method of backing while fusion-bonding to a roll, or a method of inserting a fibrous base material into an injection molding die, melt-injecting with a general injection molding machine, and fusing and lining Is.

Further, the backing material composition of the present invention has good fluidity in a wide range of the above-mentioned practical working temperature, and this good fluidity exerts a great anchoring effect on the adherend and is excellent. Since a fusion force or an adhesive force is generated, a strong interlayer adhesion can be obtained not only when a fibrous base material is used but also when a backing layer or a lowermost layer is inserted and lined with a fiber material such as nonwoven fabric or glass fiber. .

The adhesive base material used in the present invention is generally various woven fabrics, non-woven fabrics or papers made of synthetic fibers, chemical fibers, natural fibers, etc., but is not particularly limited to these. In addition, other natural leather, synthetic leather, felt, wood, etc. are also included.

〔Example〕

Next, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited by these Examples unless it exceeds the gist.

[Examples 1 to 5] The compositions shown in Table 1 were prepared by mixing the components shown by a pressure kneader. The composition obtained was adjusted to a sheet thickness of 2.5 m / m by a roll machine, and then the performances of hardness, dimensional change rate and bendability were evaluated and shown in Table 1. Further, the mixture was applied to a carpet material with a thickness of 2.5 m / m using a screw type extruder having a lip width of 400 m / m, and after roll pressure bonding cooling, punched tile carpet having a side of 50 cm square was obtained. Using the carpet in Table 1, the shape-following property and the cuttability were evaluated, and the results are shown in Table 1.

[Comparative Examples 1 to 3] Various performances of the compositions and tile carpets prepared by the same method as in Examples 1 to 5 were evaluated and shown in Table 1.

 Next, the performance evaluation methods will be described.

(1). Hardness: Conforms to JIS K-6301 The higher the value, the harder it is.

(2). Dimensional stability: For the composition, a sheet cut into a square shape with a side of 40 cm, and for the carpet is heated as it is at 60 ℃ × 2Hr, immersed in normal temperature water for 2Hr, and then reheated at 60 ℃.
After heating for 24 hours and cooling at room temperature, measure the dimensions. The dimensional change rate before and after the above treatment was calculated and expressed as (%). The smaller the value, the better the dimensional stability.

(3). Bendability: A sheet left for 2 hours at an ambient temperature of 5 ° C. was bent 180 °, and after 3 minutes, the presence or absence of cracks in the bent portion was evaluated as ◯: no crack, ×: crack.

(4). Shape conformability: Length under the center of tile carpet
Place a 50 cm, 3 cm wide, 2 m / m thick hard plate, and observe whether or not one or both ends of the tile carpet floats up from the flat floor, and neither end is visible. : ○, one of which is seen to be raised on one side: ×

(5). Cutability: The tile carpet was cut into a straight line and a curved line with a cutter and scissors, and the difficulty of the cut and the appearance of the cut surface were comprehensively evaluated, and shown by O and X.

From the examples and comparative examples in Table 1, the backing material composition of the present invention (example) is out of the scope of the present invention with respect to the composition (comparative example). Alternatively, it can be seen that the balance with the bendability is extremely excellent.

Further, it can be easily inferred that these compositions, even when they are backed to the carpet fabric, have excellent flexibility, which is sufficiently reflected in the shape-following property, and have a good fit to the floor surface.

Furthermore, the backing material composition of the present invention (Example)
It can be seen that the composition (Comparative Example) outside the scope of the present invention can be cut extremely easily by simple cutting, and therefore has good performance in terms of processing.

Effect of the Invention The backing material composition of the present invention is a filler prepared by blending at least one selected from among at least one thermoplastic elastomer, fibrous and / or scaly filler, and other fillers in specific proportions. The backing material obtained from this composition is a mixture of a softening agent, a softening agent and, if necessary, other polymer materials or additives in a ratio in a specific range, and is excellent in flexibility and dimensional stability, and has good processing properties. It is possible to provide a backing processed product having excellent properties and excellent performance which cannot be obtained by the conventional backing, very economically.

Therefore, since it has the above excellent performance, the backing material composition of the present invention is a footwear such as a tile carpet, a silencer carpet for an automobile, a second mat, a snow mat, a roll carpet for a house, an entrance mat, an interior mat, and slippers. , And can be suitably used as a backing material for other industrial products, cushioning materials and the like.

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Claims (1)

[Claims] 1. A) Vinyl bond content of 70% or more, crystallinity of 5% or more, and intrinsic viscosity [η] (30 ° C. in toluene).
0.5-dl / g or more 1,2-polybutadiene, styrene-butadiene block copolymer, hydrogenated styrene-butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-isoprene copolymer ,
Ethylene-propylene elastomer, styrene-grafted ethylene-propylene elastomer, thermoplastic polyester elastomer, ethylene-based ionomer resin, ethylene-butene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, thermoplastic polyamide elastomer, At least one thermoplastic elastomer selected from thermoplastic polyurethane elastomers 10
20% to 70% by weight, (B) fibrous and / or flaky filler 5 to 95% by weight, and other fillers 95 to 5% by weight 20
A backing material composition comprising ˜90 wt% and (C) a softening agent 0 to 60 wt%.