JP3524020B2 - Hot melt composition for carpet backing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot melt composition, and more particularly to a hot melt composition used for lining a domestic carpet such as kitchen and bath, and a carpet using the same.

[0002]

2. Description of the Related Art Household carpets use a composition mainly composed of various resins on the back surface of the carpet in order to impart various characteristics such as durability, flexibility, stain resistance, and slip resistance. Is backed by. Since various properties can be easily and easily imparted to the carpet by using the method of applying these compositions to the back surface of the carpet, various compositions have been studied for carpet backing. As a composition for lining such a household carpet, soft PVC (polyvinyl chloride), SBR (styrene-butadiene rubber), EVA (ethylene-vinyl acetate copolymer), EVA and APAO (non-crystalline polyolefin) A mixture of is known.

Among these, soft PVC is excellent in durability, flexibility and moldability, but has low heat resistance, and further, PV
Since C contains chlorine, it can be a cause of generation of dioxins at the time of incineration, so its use has been shunned. Further, SBR is excellent in final performance, but since SBR latex is used for processing, a drying step is required, and there is a problem that processability is poor. On the other hand, EVA is excellent in workability, but has a drawback that it is inferior in flexibility and has a low anti-slip effect. Further, the mixture of EVA and APAO has excellent flexibility and higher anti-slip effect than EVA, but there is a problem that the flexibility and anti-slip effect are not sufficiently improved.

Therefore, since the carpet processed by using the conventional composition for backing a carpet is not sufficient in anti-slip property, a method for easily producing a carpet having sufficient anti-slip property is provided. There is a problem that is not. Further, there is a problem that such a carpet is not provided.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. The problem is that at least one characteristic of flexibility, workability, and slip resistance is
It is an object of the present invention to provide a carpet hot-melt composition for backing a carpet having a balance of improved properties as compared with the conventional carpet backing composition. Still another object of the present invention is to provide a manufacturing method for easily manufacturing a carpet having improved carpet anti-slip effect. Still another object of the present invention is to provide a carpet having improved anti-slip effect and the like.

[0006]

According to one aspect of the present invention, there is provided a new hot melt composition for carpet backing, which comprises (A) a block copolymer comprising a polystyrene block and a hydrogenated polyolefin block. ,
What is claimed is: 1. A hot melt composition comprising (B) a polystyrene block reinforcing resin, and (C) a plasticizer and / or an amorphous polyolefin, which is particularly useful as a hot melt composition used for carpet non-slip processing. It is suitable.

In the present invention, "(A) block copolymer consisting of polystyrene block and hydrogenation-type polyolefin block" means a polystyrene block functioning as a hard block (H) and a soft block (S) having elasticity. A block copolymer composed of a hydrogenated polyolefin block that functions as
A thermoplastic elastomer having rubber elasticity,
(A) has a certain degree of rubber elasticity and can impart flexibility and toughness to the carpet-lined hot-melt composition of the present invention, and can impart an anti-slip effect and the like.

"Polystyrene block" in (A)
Means that the polystyrene block may contain other polymers usually contained in polystyrene, as long as they do not adversely affect the properties of the hot melt composition of the present invention. The polystyrene block affects physical properties such as the softening point and cohesive force of (A) and, as a result, can affect properties such as the softening point and cohesive force of the hot melt composition of the present invention.

The "hydrogenated polyolefin block" in (A) is a block composed of a hydrogenated polyolefin in which all double bonds are substantially saturated. For example, --CH ₂ CH ₂ CH ( C ₂ H ₅₎ -CH ₂ -
In a polyethylene / butylene (hereinafter referred to as _{"EB".), - CH 2 CH 2} CH (CH 3) -CH 2 - in which polyethylene / propylene (. Hereinafter referred to as "EP") refers to. The hydrogenated polyolefin block affects physical properties such as rubber elasticity of (A) and, as a result, can affect properties such as anti-slip performance and flexibility of the hot melt composition of the present invention. These hydrogenated polyolefin blocks can be used alone or in combination.

In the hot melt composition of the present invention,
The weight ratio (polystyrene block / hydrogenated polyolefin block) of the polystyrene block (A) to the hydrogenated polyolefin block is 0.1 to 0.7.
Is preferred, 0.1-0.5 is more preferred, and 0.2-
0.4 is particularly preferred.

Further, in the hot melt composition of the present invention, as (A), an HS type diblock copolymer, H
It is preferable to use at least one selected from -SH type triblock copolymers and mixtures thereof. Specifically, for example, H is added to a mixture of an H—S type diblock copolymer and an H—S—H type triblock copolymer.
A -SH type triblock copolymer may be combined and used as (A). When a mixture obtained by mixing the H—S type diblock copolymer and the H—S—H type triblock copolymer is used as (A),
The (A) content of the triblock copolymer is preferably 5 to 100% by weight, more preferably 10 to 90% by weight, and particularly preferably 20 to 85% by weight. The triblock copolymer is excellent in heat resistance, but by mixing the diblock copolymer with the triblock copolymer, the melt viscosity of the hot melt composition of the present invention is lowered, and the coating viscosity is lowered, Adhesion can be improved.

The block copolymer (A) as described above can be produced by a known method, but a commercially available product can be used. For example, it is commercially available under the trade name of KRATON G from Shell Chemical Co., Ltd. and under the trade name of Tough Tech H series from Asahi Kasei. These can be used alone or in combination.

In the present invention, "(B) polystyrene block reinforcing resin" means that the function of the polystyrene block of (A) is strengthened, the cohesive force of (A) is increased, and the performance (recoverability) of (A) at high temperature. , A resin that improves the performance of the hot-melt composition of the present invention at high temperatures by improving its elasticity, elasticity, etc.). For example, a polymer of α-methylstyrene, α-
Examples thereof include methylstyrene-based copolymers, styrene polymers and vinyltoluene polymers. In particular,
An α-methylstyrene polymer and an α-methylstyrene-based copolymer are preferred.

The above-mentioned (B) polystyrene block reinforcing resin can be produced by a known method.
A commercially available product can be used. For example, it is marketed by Rika Hercules Co., Ltd. under the trade name of Endex and by Rika Hercules Co., Ltd. under the trade name of Crystalrex. These can be used alone or in combination.

Further, in the hot melt composition of the present invention, the softening point of the polystyrene block reinforcing resin (B) is preferably 140 ° C. or higher, more preferably 150 ° C. or higher, and particularly preferably 155 ° C. or higher.

In the present invention, the "(C) plasticizer and / or non-crystalline polyolefin" is blended for the purpose of imparting flexibility and wettability to the hot melt composition of the present invention and further reducing the viscosity. To be done. Here, the "plasticizer" may be a commonly used plasticizer and is not particularly limited as long as it does not adversely affect the hot melt composition of the present invention. For example, paraffin oils, naphthenic oils, plasticizing oils such as aromatic oils, liquid hydrocarbon polymers such as polypentene, paraffin wax, synthetic waxes by the Fischer-Tropsch method, low molecular weight polyethylene waxes, oxidized waxes, low waxes. Waxes such as molecular weight polypropylene wax and castor wax can be exemplified. Particularly, plasticized oils are preferable. As such a plasticizer, a commercially available one can be used. For example, Idemitsu Kosan Co., Ltd.
MC oil (trade name) manufactured by Showa Shell Co., Ltd., Shelf Rex (trade name) manufactured by Showa Shell Co., Ltd., and the like can be exemplified.

Further, "non-crystalline polyolefin" means
For example, non-crystalline polypropylene, non-crystalline ethylene-propylene copolymer, non-crystalline propylene and 1
-Refers to a butene copolymer. The amorphous polyolefin can be produced by a known method, but a commercially available product can be used. For example, UBETAC (trade name) manufactured by Ube Industries, Ltd., manufactured by Hurus Co., Ltd. Best plast (trade name), etc. can be exemplified.

The softening point of the amorphous polyolefin is 10
0-180 degreeC is preferable, 105-170 degreeC is more preferable, 125-160 degreeC is especially preferable. The melt viscosity of the amorphous polyolefin at 190 ° C. is 200 to 1500.
0 cps is preferable, 300 to 10000 cps is more preferable, and 400 to 8500 cps is particularly preferable.
The plasticizer (C) and / or the amorphous polyolefin can be used alone or in combination.

In the hot melt composition of the present invention,
The content of the block copolymer (A) is preferably 20 to 50% by weight, more preferably 20 to 45% by weight, and 25
It is particularly preferable that the content is ˜45 wt%. The polystyrene block reinforcing resin (B) is preferably contained in an amount of 5 to 55% by weight, more preferably 5 to 35% by weight, and particularly preferably 5 to 25% by weight. The (C) plasticizer and / or the amorphous polyolefin is preferably contained in an amount of 20 to 55% by weight, more preferably 25 to 55% by weight, and 30 to
It is particularly preferable to contain 55% by weight.

In the hot melt composition of the present invention,
Various "additives" commonly used in hot melt compositions may further be included. Where "additives"
Is to improve the characteristics of the hot melt composition comprehensively,
Maintains the easiness of backing of the carpet and the quality of the carpet after backing. For example, stabilizers (antioxidants, etc.) to improve heat resistance, oxidation resistance, weather resistance, deterioration due to ultraviolet rays. Examples thereof include at least one selected from a UV absorber for prevention, a flame retardant, an antiblocking agent for hot melt adhesives, and an inorganic filler for suppressing shrinkage.

As such an additive, any of those usually used can be used. As the antioxidant, for example, a phenol-based antioxidant, a phosphorus-based antioxidant, and a sulfur-based antioxidant are preferable. Examples of the ultraviolet absorber include a benzophenone-based ultraviolet absorber and
Benzotriazole-based UV absorbers such as 2- (2-hydroxy-5-methylphenyl) benzotriazole are preferred. The above-mentioned additives can be used alone or in combination.

The above-mentioned hot-melt composition of the present invention can be used for lining carpets, but is particularly suitable for non-slip carpets. In the present invention, the hot-melt composition of the present invention is applied to a carpet using a coating method usually used for lining carpets, to thereby easily and easily provide a carpet excellent in anti-slip effect and the like. It can be manufactured. The coating may be performed on the entire back surface of the carpet, but may also be performed in a linear shape, a strip shape, or the like. Further, by lining the carpet with the hot melt composition of the present invention,
It is possible to provide a carpet having improved carpet anti-slip effect and the like.

[0023]

EXAMPLES The present invention will be described in more detail below with reference to examples and comparative examples. However, these examples and comparative examples are merely one aspect of the present invention, and the present invention is not limited by these examples. It is not something that will be done.

The components used to produce the hot melt compositions of the Examples and Comparative Examples are shown below. (A) is a block copolymer comprising a polystyrene block and a hydrogenated polyolefin block, and (A1) is
The hydrogenated polyolefin is a copolymer of ethylene and butylene, the polystyrene block / hydrogenated polyolefin block (weight ratio) is 29/71,
Melt flow rate (MFR) (200 ° C, 5.0k
g) 1.0 g / min triblock copolymer having a structure of styrene-ethylene / butylene-styrene (KRATON G1652 manufactured by Shell Chemical Co., Ltd.)
(Product name)). In (A2), the hydrogenated polyolefin is a copolymer of ethylene and butylene, the polystyrene block / hydrogenated polyolefin block (weight ratio) is 30/70, and the MFR (200 ° C.,
5.0 kg) is 60 g / min, has a structure of styrene-ethylene / butylene-styrene, and contains a triblock copolymer containing 70% of a diblock copolymer (KRATON manufactured by Shell Chemical Co., Ltd.). ) G1726 (trade name)).

(B) is a polystyrene block reinforcing resin, and (B1) is an α-methylstyrene copolymer having a softening point of 155 ° C. (Rendix Hercules Co., Ltd. Endex 155 (trade name). )). (B2) is
Polymer of α-methylstyrene having a softening point of 140 ° C. (Crystalex 5140 manufactured by Rika Hercules Co., Ltd.)
(Product name)). (C) is a plasticizer or an amorphous polyolefin, and (C1) is a plasticizer (MC oil (trade name) manufactured by Ube Industries, Ltd.). (C2) is
Softening point 150 ℃, melt viscosity at 190 ℃ 1500cp
s is an amorphous polypropylene (Ubetack UT-2115 (trade name) manufactured by Ube Industries, Ltd.).

(D) is a crystalline polyolefin, and (D1) is a crystalline polypropylene wax having a softening point of 155 ° C. (Viscole 550 manufactured by Sanyo Kasei Co., Ltd.).
P (trade name)). Here, the physical properties (A) to (D) were measured by the following methods. The softening point is JIS
It was measured using the ring and ball method described in K2207. MFR
Was measured using the method described in ASTM D1238. The melt viscosity was measured using a Brookfield rotational viscometer.

Example 1 Preparation of Hot Melt Adhesive The hydrogenated polyolefin is a copolymer of ethylene and butylene, the polystyrene block / hydrogenated polyolefin block (weight ratio) is 29/71 and the MFR is (200 ° C, 5.0 kg) is 1.0 g / mi
n, a triblock copolymer having a structure of styrene-ethylene / butylene-styrene (Shell Chemical Co., Ltd.)
Kraton G1652 (trade name) (A
1): 30 parts by weight, a polystyrene block reinforcing resin having a softening point of 155 ° C. and an α-methylstyrene copolymer (Endex 1 manufactured by Rika Hercules Co., Ltd.)
55 (trade name)) (B1): 20 parts by weight, and plasticizer (MC oil (trade name) manufactured by Idemitsu Kosan Co., Ltd.) (C1): 50 parts by weight of the components (A1), ( B1) and (C1) were charged into a container and uniformly mixed while heating and dissolved. This composition is 100 parts by weight, and 0.6 parts by weight of a stabilizer (SUMIZUMI BP-1 manufactured by Sumitomo Chemical Co., Ltd.)
01 (trade name)) was added to obtain a hot melt composition of Example 1. The hot melt composition (A) of Example 1 contained 100% by weight of the triblock copolymer.

Evaluation of hot melt composition (1) Viscosity of hot melt composition The viscosity of the hot melt composition is from Brookfield
It measured at 180 degreeC using the rotational viscometer. Implementation
The viscosity of the hot melt composition of Example 1 is 7200 cps
It was. (2) Softening point of hot melt composition The softening point of the hot melt composition depends on the components (A) to (D).
It is evaluated using the same method used to measure the softening point.
It was The softening point of the hot melt composition of Example 1 is 123 ° C.
Met. (3) Fabrication of carpet for evaluation of non-slip Hot melt the back of the carpet using a roll coater
100 g / m composition ²At 180 ℃
After coating, cool to room temperature to prevent slipping
I made a pet. The resulting carpet is 7 cm x 5
cm size and 10 cm x 5 cm size
The pieces were cut into pieces and subjected to the following evaluations.

(4) Anti-slip performance of hot melt composition The anti-slip performance of hot melt composition is JIS P81.
The static friction coefficient was measured using a method similar to that described in 47. A horizontal method was used as a test method, and an evaluation carpet having a size of 7 cm × 5 cm had a weight of 2 kg and a moving speed of 75 mm / min.
The static friction force was measured at room temperature using a glass plate as a horizontal plate. The coefficient of static friction of the hot melt composition of Example 1 was a value larger than 1.0. The larger the coefficient of static friction, the higher the anti-slip performance of the hot melt composition.

(5) Washing resistance of hot-melt composition The washing resistance of the hot-melt composition is JIS L0217.
Using a method similar to the method described in 103 of Appendix 1 of
After performing a washing process on the evaluation carpet having a size of 7 cm × 5 cm, the static friction coefficient was measured by the same method as the method described in the evaluation of the hot melt anti-slip performance. The static friction coefficient of the hot melt composition of Example 1 was 0.7. The larger the coefficient of static friction means that the hot melt composition maintains higher performance even after washing, and the hot melt composition has higher wash resistance.

(6) Residual tackiness of hot melt composition The residual tackiness of the hot melt composition is 7 when the size of two sheets is 7
It was carried out by observing whether or not blocking occurred when the slip-processed surfaces of the cm × 5 cm evaluation carpet were overlapped. A sample in which no blocking occurred was rated as ⊚, a sample in which extremely weak blocking occurred but in which there was substantially no problem was rated as ○, and a block in which blocking occurred was rated as ×. The residual tackiness of the hot melt composition of Example 1 was ⊚.

(7) Adhesiveness of Hot Melt Composition to Carpet The adhesiveness of the hot melt composition to carpet was evaluated on the basis of the evaluation of the residual tackiness of the hot melt adhesive when two sheets adhered due to blocking. It was evaluated by visually observing whether or not the yarn loss occurred when the carpet for use was peeled off. Pass the one in which no thread omission occurred,
Those that did not occur were rejected. The hot-melt composition of Example 1 had a residual adhesiveness of ⊚ and no blocking occurred on the carpet, and therefore passed the evaluation without evaluating the adhesiveness to the carpet.

(8) Heat resistance of hot melt composition The heat resistance of the hot melt composition has a size of 10 cm × 5.
Place the cm evaluation carpet on the stainless steel plate, and
The sample was stored at 80 ° C. for 1 day while applying a load of 00 g, and then evaluated by visually observing the migration of the hot melt composition from the evaluation carpet to the stainless steel plate. Those in which the migration of the hot melt composition was not recognized at all were judged as passing, and those in which the migration was recognized were judged as unacceptable. The heat resistance of the hot melt composition of Example 1 passed.

(9) Transferability of the plasticizer contained in the hot-melt composition to the PVC sheet The transferability of the plasticizer contained in the hot-melt composition to the PVC sheet was measured by using the evaluation carpet having a size of 10 cm × 5 cm. It was placed on a tile (PVC sheet) and stored for 5 days at 60 ° C. under a load of 500 g. Then, the presence or absence of migration of the plasticizer contained in the hot melt composition from the evaluation carpet to the P tile was visually observed. It was evaluated by observing at. The case where the plasticizer contained in the hot melt composition was not observed to be transferred to the P tile was regarded as pass, and the case where transfer of the plasticizer was confirmed was regarded as fail. Example 1
The migration of the plasticizer of the hot melt composition of No. 1 was acceptable.

(10) Comprehensive Evaluation of Hot Melt Composition A comprehensive evaluation was made by comprehensively considering the evaluation results of the above items. The main aspects of the comprehensive evaluation are anti-slip performance and wash resistance. When the static friction coefficient was 0.5 or more, the result was acceptable, and when one of the static friction coefficients was less than 0.5, the result was unacceptable. The comprehensive evaluation of the hot melt composition of Example 1 was successful.

Examples 2 to 4 Examples 2 to 4 were used in the same manner as in Example 1 except that the components used in Example 1 were changed to the components shown in Table 1 and the amounts thereof. ~ 4 hot melt adhesives were obtained. In addition, the hot-melt compositions (A) of Examples 2, 3, and 4 are triblock copolymers of 83 and 6, respectively.
Contains 5, 40% by weight. The hot melt adhesives of Examples 2-4 were evaluated using a method similar to that described in Example 1. The results are shown in Table 1.

Comparative Examples 1 and 2 Comparative Examples 1 and 2 were used in the same manner as in Example 1 except that the components used in Example 1 were changed to the components shown in Table 1 and the amounts thereof. And hot melt adhesives No. 2 and No. 2 were obtained. In addition, (A) of the hot melt compositions of Comparative Examples 1 and 2 was a triblock copolymer of 90 and 1 respectively.
Contains 00% by weight. The hot melt adhesives of Comparative Examples 1 and 2 were evaluated using a method similar to that described in Example 1. The results are shown in Table 1.

[0038]

[Table 1] a) Unit is parts by weight. b) The unit is cps (180
℃). c) The unit is ° C. d) The static friction coefficient is shown.

[0039]

The hot-melt composition for carpet backing of the present invention comprises a block copolymer (A) comprising a polystyrene block and a hydrogenated polyolefin block,
Since it comprises (B) a polystyrene block reinforcing resin, and (C) a plasticizer and / or an amorphous polyolefin, it has flexibility and processability as compared with conventionally known hot melt compositions for carpet backing. , At least one property of the anti-skid effect is improved. Therefore, it is possible to provide a hot-melt composition for carpet backing having a good balance of properties. Furthermore, by coating the carpet with the hot melt composition of the present invention,
It is possible to easily provide a manufacturing method for manufacturing a carpet having an excellent anti-slip effect and the like. Further, it is possible to provide a carpet having an improved anti-slip effect on the carpet.

Continuation of the front page (56) References JP-A-53-23336 (JP, A) JP-A-48-40833 (JP, A) JP-A-11-106730 (JP, A) JP-A 64-51487 (JP , A) JP 7-11219 (JP, A) JP 10-183081 (JP, A) JP 50-60536 (JP, A) JP 9-125035 (JP, A) Special table flat 9-505840 (JP, A) Fukada Hiroshi, Shin Polymer Bunko 16, Hot Melt Adhesion, Polymer Publishing Co., Ltd., May 20, 1979, 298 (58) Fields investigated (Int.Cl. ⁷ , DB name) A47G 27/02 C09J 4/00-201/10 C08L 7/00-101/16

Claims (8)

(57) [Claims] 1. A carpet comprising (A) a block copolymer comprising a polystyrene block and a hydrogenated polyolefin block, (B) a polystyrene block reinforcing resin, and (C) a plasticizer and / or an amorphous polyolefin. meet our backing for hot-melt composition
Te, hot melt composition for a non-slip carpet. 2. The hot melt composition according to claim 1, wherein the hydrogenated polyolefin of the block copolymer (A) is a copolymer of ethylene and butylene. 3. The weight ratio (polystyrene block / hydrogenated polyolefin block) of the polystyrene block of the block copolymer (A) to the hydrogenated polyolefin block is 0.1 to 0.7. the hot melt composition <br/> described 2. 4. The hot melt composition according to claim 1, wherein the block copolymer (A) contains a triblock copolymer in an amount of 5 to 100% by weight. 5. The hot melt composition according to claim 1, wherein the polystyrene block reinforcing resin (B) has a softening point of 140 ° C. or higher. 6. (A) block copolymer: 20 to 50% by weight (B) polystyrene block reinforcing resin: 5 to 55% by weight, and (C) plasticizer and / or non-crystalline polyolefin: 20
% To 55% by weight, and the hot melt composition according to claim 1. 7. A carpet hot melt composition according to any one of claims 1 to 6 were prepared by coating the back surface of the carpet. 8. A method for producing a carpet, wherein the hot melt composition according to any one of claims 1 to 6 is applied to the back surface of the carpet.