JP2001055545A - Tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tape reduced in a chlorine content without detriment to mechanical properties by using a resin composition containing a polyvinyl chloride resin, a polyolefin resin, a filler, a chlorinated polyethylene, and a plasticizer in a specified ratio. SOLUTION: This tape is made from a resin composition containing 100 pts.wt. polyvinyl chloride resin, 100-200 pts.wt. polyolefin resin, 60-350 pts.wt. filler, 5-50 pts.wt. chlorinated polyethylene, and 30-70 pts.wt. plasticizer and desirably has a controlled chlorine content of 8-15 wt.%. The polyolefin resin is exemplified by a high-density polyethylene, an ethylene/propylene copolymer rubber, an ethylene/vinyl acetate copolymer, or an ethylene/ethyl acrylate copolymer. The filler is exemplified by a filler of a chlorine-containing, potassium carbonate or like type or a flame retardant of a bromine-containing, phosphoric ester or like type. The plasticizer is exemplified by di-2-ethylhexyl phthalate or epoxidized soybean oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape wound as an electric insulating material around an electric cable used in electric equipment and automobiles, and more particularly to a tape whose chlorine content is greatly reduced.

[0002]

2. Description of the Related Art Conventionally, a tape is composed of 25 to 60 parts by weight of a plasticizer and 100 parts by weight of a polyvinyl chloride (hereinafter referred to as PVC) resin as a main material, and other compounding agents (stabilizer, lubricant, coloring agent). And the like, in which 2 to 30 parts by weight are blended. Further, in order to use it for electrical insulation, a resistance value of 1 × 10 ¹² Ω · cm or more in volume specific resistance value is required.

[0003] The chlorine content of such tapes is 30-4.
It is in the range of 5% by weight, and is usually close to 35% by weight.

[0004]

However, in recent years, it has been reported that when a chlorine-containing substance is burned, dioxin or hydrogen chloride is generated depending on the burning conditions, which is harmful to humans and the environment.

Here, the generation of these substances can be suppressed by reducing the amount of chlorine contained in the tape. However, if the chlorine content is reduced unnecessarily, the mechanical properties such as the tensile strength and the elongation at break of the tape are reduced, and a new problem occurs that the tape cannot be put to practical use.

Accordingly, it is an object of the present invention to reduce the amount of chlorine contained in the tape while maintaining the mechanical properties.

[0007]

Means for Solving the Problems The present inventor has conducted intensive studies in view of the above, and as a result, the compounding of the tape was carried out using 100 parts by weight of a PVC resin and 100 parts by weight of a polyolefin (hereinafter referred to as PO) resin.
200 parts by weight, a filler of 60 to 350 parts by weight, a chlorinated polyethylene resin of 5 to 50 parts by weight, and a plasticizer of 30 to 70 parts by weight, while maintaining the mechanical properties of the tape and having a chlorine content of 8 to 15% by weight. The present inventors have found that the above-mentioned problems can be solved by adjusting the distance to the above, and completed the present invention.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the reason why the above PO resin is blended is to reduce the relative amount of chlorine contained while maintaining the flexibility of the tape. If the amount of the PO resin is too large, the tensile strength of the tape is reduced. If the amount is too small, the relative amount of chlorine in the tape is not reduced.
100 to 200 parts by weight with respect to 100 parts by weight of the C resin,
Preferably, the amount is 120 to 170 parts by weight.

As the PO resin, conventionally known PO resins can be appropriately selected and employed, and high-density polyethylene, medium-density polyethylene, low-density polyethylene, ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer can be used. Olefin-based rubber such as coalesced rubber, ethylene-butene copolymer rubber, ethylene-vinyl ester copolymer such as ethylene-vinyl acetate copolymer, ethylene-ethyl-
Ethylene-based (co) polymers such as acrylate copolymers, ethylene-α, β-carboxylic acids or copolymers thereof with ethylene- (meth) acrylic acid alkyl ester copolymers, polypropylene, propylene-ethylene Examples include a polypropylene-based copolymer such as a copolymer and a polybutene-based copolymer.

In the present invention, the filler is compounded in order to reduce the relative amount of chlorine contained in the tape. If the compounding ratio of the filler is too large, the elongation at break of the tape decreases, and if it is too small, the relative amount of chlorine contained in the tape is not reduced. 60 to weight parts
The amount is preferably 350 parts by weight, more preferably 150 to 250 parts by weight.

As the filler, conventionally known fillers and flame retardants can be appropriately selected and employed. Chlorine-based fillers, calcium carbonate-based fillers, magnesium carbonate-based fillers, aluminum hydroxide-based fillers, reactive type Chlorine flame retardant, bromine flame retardant, brominated epoxy resin flame retardant, brominated epoxy / phenoxy resin flame retardant, bromine-containing flame retardant, bromine reactive flame retardant, bromine polymer flame retardant, phosphoric acid Ester flame retardant, red phosphorus flame retardant, magnesium hydroxide flame retardant, silicone flame retardant, boron flame retardant, tin flame retardant, zinc borate flame retardant, tin / zinc flame retardant, ammonium polyphosphate -Based flame retardants, polyphosphoramide-based flame retardants,
Zirconium flame retardants, nitrogen compound flame retardants, calcium / aluminate flame retardants, ammonium molybdate flame retardants, guanidine flame retardants, melamine flame retardants, and the like.

In the present invention, the chlorinated polyethylene is blended in order to prevent a decrease in the elongation at break of the tape due to the addition of a large amount of a filler and to become a compatibilizer between the PVC resin and the PO resin. If the compounding ratio of the chlorinated polyethylene is too large, the tensile strength of the tape is reduced, and if it is too small, the effect of preventing a decrease in the elongation at break of the tape cannot be obtained. 5
The content is preferably 50 to 50 parts by weight, more preferably 15 to 40 parts by weight.

As the chlorinated polyethylene, a conventionally known chlorinated polyethylene can be appropriately selected and employed.

In the present invention, the plasticizer is blended in order to impart flexibility to the tape. If the amount of the plasticizer is too large, the tensile strength of the tape is reduced. If the amount is too small, the flexibility of the tape cannot be obtained. To 70 parts by weight, more preferably 40 to 6 parts by weight
0 parts by weight is good.

As the plasticizer, conventionally known plasticizers can be appropriately selected and employed. Di-2-ethylhexyl phthalate, diisodecyl phthalate, epoxidized soybean oil, adipic acid-based polyester, trimellitic acid ester, phosphate ester , Tricresyl phosphate, chlorinated paraffin and the like.

The tape according to the present invention may have an adhesive layer formed on one or both sides of the tape. As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer, generally used rubber-based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, and the like can be appropriately selected and employed.

[0017]

EXAMPLES Examples according to the present invention will be described below with reference to Tables 1 and 2 in comparison with Comparative Examples.

[0018]

[Table 1]

[0019]

[Table 2]

In all Examples and Comparative Examples in Tables 1 and 2, low density polyethylene was used as the PO resin, aluminum hydroxide was used as the filler, and di-2-ethylhexyl phthalate was used as the plasticizer. .

The chlorine content in the evaluations of Tables 1 and 2 was calculated assuming that the chlorine content in the PVC resin was 56.8% by weight and the chlorine content in the chlorinated polyethylene was 30.0% by weight. In order to reduce the chlorine content of the tape while maintaining the mechanical properties,
The weight% was evaluated as ○ (pass).

The tensile strength and elongation at break in the evaluations of Tables 1 and 2 were measured according to JIS K 6732. Regarding the tensile strength, 10 N / mm ² or more, which is the strength necessary for practical use of the tape, was evaluated as ○ (pass). Regarding the elongation at break, 150% to 350% was evaluated as ○ (pass) in order to maintain the mechanical properties of the tape.

In the above overall evaluation, ○ indicates that all the characteristic values passed, and X indicates that any of the characteristic values failed.

Embodiment 1 will be described. The tape in this example was prepared by kneading the compounding materials shown in Table 1 and other small amounts of additives (stabilizers, lubricants, coloring agents, etc.) with a Banbury mixer and calendering the film to a thickness of about 120 μm. It is formed in a tape shape. The other examples and comparative examples described below are the same as the present example unless otherwise specified.

In Examples 2 and 3, the amount of the PO resin in the tape in Example 1 was changed to 150 parts by weight and 165 parts by weight, respectively. Example 1,
In Examples 2 and 3, target values were obtained for all evaluation items, and the chlorine content in the tape was reduced while maintaining the mechanical properties of the tape.

In Comparative Example 1 in which the amount of the PO resin in the tape was 80 parts by weight, it was confirmed that the chlorine content could not be reduced to the target value. In addition, the compounding amount of the PO resin is 2
In Comparative Example 2 where the weight was 40 parts by weight, the tape became too flexible, and the target values could not be obtained for both the tensile strength and the elongation at break.

In Comparative Example 3 in which the content of the filler in the tape was 50 parts by weight, it was confirmed that the chlorine content could not be reduced to the target value. Further, the compounding amount of the filler is 400
In Comparative Example 4, in which the parts by weight were used, the tape was embrittled and the target tensile strength and breaking elongation could not be obtained.

In Comparative Example 5, in which the amount of the chlorinated polyethylene in the tape was 3 parts by weight, the tape was embrittled and the desired tensile strength and elongation at break could not be obtained. In Comparative Example 6 in which the blended amount of the chlorinated polyethylene was 70 parts by weight, not only the chlorine content in the tape could not be reduced but also the tape became too flexible, and the target tensile strength and elongation at break were not achieved. Could not be obtained.

In Comparative Example 7 in which the amount of the plasticizer in the tape was 20 parts by weight, the tape was embrittled and the target elongation at break could not be obtained. In Comparative Example 8 in which the blending amount of the plasticizer was 80 parts by weight, the tape became too flexible, and the target tensile strength could not be obtained.

Although not shown in Tables 1 and 2, each of the Examples and Comparative Examples has the same electrical insulation properties as those of the related art (1 × 10 ¹² Ω · cm or more in volume resistivity). I was

[0031]

According to the present invention, the composition of the tape is 100 parts by weight of a polyvinyl chloride resin, 100 to 200 parts by weight of a polyolefin resin, 60 to 350 parts by weight of a filler, 5 to 50 parts by weight of a chlorinated polyethylene, By using 30 to 70 parts by weight of the agent, while maintaining the mechanical properties and electrical insulation required when wound for electric insulation and bundling on electric wires used in electrical equipment and automobiles, The chlorine content of the tape could be adjusted to 8 to 15% by weight.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tadashi Ogushi 2-13-1, Dai, Kamakura-shi, Kanagawa F-term in Toyo Chemical Co., Ltd. (reference) 4J004 AA05 AA10 AB01 CA04 CA05 EA05 FA05

Claims (1)

[Claims] 1. 100 parts by weight of a polyvinyl chloride resin, 100 to 200 parts by weight of a polyolefin resin, 60 to
A tape comprising a resin composition containing 350 parts by weight, 5 to 50 parts by weight of chlorinated polyethylene, and 30 to 70 parts by weight of a plasticizer.