KR20120085605A - Composition For Sheath Material Using Recycled Plastics - Google Patents

Abstract

PURPOSE: A sheath material composition is provided to reduce production costs of a cable by using recycled plastic, and to meet conditions for flame retardancy and mass loss which are required for a cable. CONSTITUTION: A sheathe material composition comprises a mixture of 20-70 weight% of a recycled plastic composition, and 80-30 weight% of a new plastic composition. The recycled plastic composition comprises 100.0 parts by weight of waste plastic, and 30-80 weight of a plasticizer. The new plastic composition comprises 100.0 parts by weight of new plastic, 30-80 parts by weight of plasticizer, 1-80 parts by weight of a flame retardant, and 1-15 parts by weight of a stabilizer. The plasticizer is one or more types selected from phthalic acids, trimellitic acids, phosphites, epoxys, polyesters, aliphatics and anti-chlorine-based plasticizers.

Description

Composition For Sheath Material Using Recycled Plastics

The present invention relates to a cable comprising a sheath material composition using recycled plastic and a sheath made from the sheath material composition.

As recycled plastics, recycled polyvinyl chloride (PVC), recycled polyethylene (PE), recycled polypropylene (PP), and the like are used in the art, and such recycled plastics are used in various industrial fields such as cables and rubber flooring. In particular, recycled plastics are used in a cable-related industry by recovering compound scrap and waste cables produced during cable manufacturing, crushing, crushing and extruding to recycle the plastic contained in the wires in the manufacture of cables. .

The use of recycled plastic in the cable can reduce the manufacturing cost of the cable, but there are also problems that fall short of the mass loss standard specified in IEC 60092-359, IEC 60502, etc., and the flame retardant characteristic standard specified in IEC 60332-1. It was.

The technical problem of the present invention is to provide a sheath material composition which can produce a cable having the physical properties required for the cable while reducing the manufacturing cost of the cable by using the recycled plastic.

The sheath material composition of the present invention for achieving the above object is composed of a mixture of 20 to 70% by weight of the recycled plastic composition and 80 to 30% by weight of the newborn plastic composition, the recycled plastic composition is 100% by weight of recycled plastic Part and a plasticizer 30 to 80 parts by weight, the new plastic composition is characterized in that it comprises 100 parts by weight of the new plastic, 30 to 80 parts by weight plasticizer, 1 to 80 parts by weight of the flame retardant and 1 to 15 parts by weight of the stabilizer.

The sheath material composition of the present invention can reduce the manufacturing cost of the final cable produced by using recycled plastic, and can satisfy all the standard values of mass loss and flame retardancy required by the cable.

Hereinafter, the present invention will be described in detail.

Commonly used cables have a structure comprising at least one central conductor, insulating layer, bedding layer, braided layer and sheath layer, and the present invention relates to a sheath material composition for forming the sheath layer.

The sheath material composition of the present invention consists of a mixture of 20 to 70 wt% recycled plastic composition and 80 to 30 wt% new plastic composition, preferably 40 to 60 wt% recycled plastic composition and 60 to 40 wt% It consists of a mixture of newborn plastic compositions. With respect to this content, if the recycled plastic composition is included in excess of 70% by weight (or when the new plastic composition is included in less than 30% by weight), there is a problem that the mass loss or flame retardant properties of the finally produced cable are degraded. When the recycled plastic composition is included in less than 20% by weight (or when the new plastic composition is included in excess of 80% by weight), the required physical properties of the cable are satisfied, but the manufacturing cost of the manufactured cable is excessively included. It is not economically low compared to conventional sheath material compositions because it is not significantly lowered.

Recycled plastic of the present invention is a cable manufacturing process in the art and recovers the resulting compound scrap and waste wires after the cutting process, the crushing process to chop the cutting finely and the crushing process to crush the crushed finer It means a plastic component that is rough, and is also called waste plastic.

Such recycled plastics include recycled poly vinyl chloride, recycled ethylene vinyl acetate, recycled polyethylene, recycled polypropylene, recycled polytetrafluoroethylene ), Recycled tetrafluoroethylene perfluoroalkylvinylether copolymer, recycled tetrafluoroethylene hexafluoropropylene copolymer, recycled ethylene tetrafluoroethylene copolymer (recycled ethylene tetrafluoroethylene copolymer, recycled polyvinylidenefluoride, recycled polyethylene terephthalate, recycled polybutylene terephthalate, One or two or more selected from the group consisting of recycled polyetherether keton, recycled nylon 6, and recycled nylon 66 may be used.

In addition, the recycled plastic composition of the present invention means a composition comprising the recycled plastic, the recycled plastic composition includes 100 parts by weight of recycled plastic and 30 to 80 parts by weight of plasticizer. If the amount of the plasticizer is less than 30 parts by weight, the plasticizing effect is insignificant. If it is contained in an amount exceeding 80 parts by weight, the plasticizer moves to the surface of the recycled plastic, which is not preferable.

The recycled plastic composition of the present invention may further contain other additives in addition to the plasticizer as appropriate.

The recycled plastic composition may be prepared by the following method, but is not limited thereto. Regenerated plastics and plasticizers and other additives are added to an extruder having a single screw, and then melted and mixed at a temperature of 120 ° C. to 220 ° C., preferably in a temperature range of 150 ° C. to 190 ° C., and then extruded. Plastic is formed. The recycled plastic takes the form of pellets and the size of the pellets is from 0.5 mm to 10 mm, preferably from 2 mm to 8 mm.

The new plastic of the present invention is a concept relative to the recycled plastic, and means a plastic made by using the raw material of the plastic without undergoing the cutting, crushing, and crushing processes of the recycled plastic.

In addition, the new plastic composition of the present invention means a composition comprising the new plastic, the new plastic composition includes 30 to 80 parts by weight of plasticizer, 1 to 80 parts by weight of flame retardant and 1 to 15 parts by weight of the plasticizer in 100 parts by weight of the new plastic. do. By including additives such as plasticizers, flame retardants, stabilizers, it is possible to improve the processability of the new plastic composition and to satisfy the physical properties required for the finally produced cable.

Such new plastics include poly vinyl chloride, ethylene vinyl acetate, polyethylene, polypropylene, polytetrafluoroethylene, tetrafluoroethylene perfluoroalkyl Tetrafluoroethylene perfluoroalkylvinylether copolymer, tetrafluoroethylene hexafluoropropylene copolymer, ethylene tetrafluoroethylene copolymer, polyvinylidenefluoride, polyethylene tere One or two or more selected from the group consisting of phthalate (polyethylene terephthalate), polybutylene terephthalate, polyetherether keton, nylon 6 (nylon 6) and nylon 66 (nylon 66) four It can be.

In particular, the polyvinyl chloride (PVC) of the new plastic has a structure-(CH ₂ -CHCl) _n -polymerized vinyl chloride (CH ₂ = CHCl), the physical properties and processability is changed according to the P (polymerization) value Has characteristics. In consideration of such characteristics, the present invention uses polyvinyl chloride (PVC) having a P (polymerization degree) of 1000 or more, preferably polyvinyl chloride (PVC) having a P (polymerization) value of 1000 or more and 3000 or less, More preferably, polyvinyl chloride (PVC) whose P (polymerization degree) value is 1000 or more and 2500 or less is used. If the P (polymerization) value is less than 1000 in relation to the P (polymerization degree), there is a problem that the physical properties of the sheath material composition is lowered. It is not desirable to occur.

In addition, in order to impart plasticity to the newborn plastic composition, it includes 30 to 80 parts by weight of a plasticizer. If the plasticizer is included in less than 30 parts by weight, the plasticizing effect is insignificant, and if contained in more than 80 parts by weight, the plasticizer is not preferable because the transition phenomenon occurs to move to the surface of the new plastic. In particular, polyvinyl chloride, which is used as a new plastic, is a hard and brittle glassy material at room temperature, and has poor extrusion processability and flexibility, but when included with a plasticizer in the new plastic composition, the polyvinyl chloride decreases the melting temperature and melt viscosity of the new plastic composition to extrude it. Improves machinability and flexibility.

The plasticizer of this invention has a molecular weight of 200 or more, and has a molecular weight of 200 or more and 600 or less. When the molecular weight of the plasticizer is less than 200, tensile strength, heat resistance, mass loss, etc. of the manufactured cable are lowered, and when it exceeds 600, elongation is lowered, and the material becomes hard, which is not preferable.

As such a plasticizer, one or two or more selected from the group consisting of phthalic acid based, trimellitic acid based, phosphite based, epoxy based, polyester based, aliphatic based and anti-chlorine based plasticizers can be used.

As the phthalic acid-based plasticizer, di-butylphthalate (DBP), di-octyl phthalate (DOP), di-2-ethylhexyl phthalate (DEHP), di-isononyl phthalate (DINP), di-isodecyl phthalate (DIDP), and butyl benzyl (BPB). phthalate) and the like, or may be used. Tri-ethylhexyl trimellitate (TOTM), tri-isononyl trimellitate (TINTM), tri-isodecyl trimellitate (TIDTM), etc. may be used as the trimellitic acid-based plasticizer; Tri-cresyl phosphate (TCP), tri-2-ethylhexyl phosphate (TOP), cresyl diphenyl phosphate (CDP), triaryl phosphate (TAP), or the like may be used as the phosphite plasticizer; EPO (epoxidized soybean oil), ELO (epoxidized linseed oil) and the like may be used as the epoxy-based plasticizer; As the aliphatic plasticizer, DOA (di-2-ethylhexyl adipate), DOZ (di (2-ethylhexyl) azelate), DIDA (di-iso decyl adipate) and the like may be used one or two or more; Cereclor S-45 (chlorine content 43-45%), S-52 (chlorine content 43-45%), S-52 (chlorine content 50-52%) and the like may be used as the anti-chlorine plasticizer. It can be used in combination with the phthalate plasticizer or phosphite plasticizer.

The flame retardant of the present invention is included in 1 to 80 parts by weight of the new plastic composition, when included in less than 1 part by weight, the flame retardant effect is insignificant, and when included in excess of 80 parts by weight as well as increasing the material cost, the tensile strength and elongation of the room temperature is lowered Not preferred.

As such a flame retardant, one or two or more selected from the group consisting of a metal hydroxide, a mixture of a futite and a magnesium hydroxide, an antimony flame retardant, a boron flame retardant, a tin flame retardant, and a molybdenum flame retardant may be used. And metal hydroxides surface-treated with at least one selected from the group consisting of, fatty acids and aminosilanes. Magnesium hydroxide, aluminum hydroxide, magnesium hydroxide carbonate, hydrotalcite can be used as the metal hydroxide.

The stabilizer of the present invention is used to impart thermal stability to the new plastic composition, and serves to quickly neutralize the hydrochloric acid gas generated when the polyvinyl chloride used as the new plastic is heated.

The stabilizer is included in the new plastic composition in an amount of 1 to 15 parts by weight, and when included in less than 1 part by weight, the heat resistance is insignificant. When it is included in an amount exceeding 15 parts by weight, the stabilizer is moved to the surface of the new plastic. This is undesirable because a transition phenomenon occurs.

Such stabilizers include metal thermal stabilizers such as organotin stabilizers, carboxylic acid metal salt stabilizers, and lead stabilizers; Non-metal thermal stabilizers such as epoxy stabilizers and organic phosphites may be used, and one or two or more such stabilizers may be used.

The present invention also provides a cable comprising a sheath made by the sheath material composition.

[Example]

Hereinafter, the present invention will be described more specifically by way of examples. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims and their equivalents. It should not be construed as an intention to limit the scope to example.

In order to examine the properties of the cable according to the content of the components of the sheath material composition of the present invention, the sheath material compositions of Examples and Comparative Examples were prepared using the composition (unit: wt%) shown in Table 1 below.

ingredient Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 play
Plastic composition 100 parts by weight of recycled polyvinyl chloride and 30 parts by weight of plasticizer
20
40
60
0
80
100 rebirth
plastic
Composition 100 parts by weight of polyvinyl chloride, 50 parts by weight of plasticizer, 32 parts by weight of flame retardant and 5 parts by weight of stabilizer
80
60
40
100
20
0

[Description of Ingredients Used in Table 1]

* Plasticizer: DINP (di-isononyl phthalate)

* Flame Retardant: Mixture of Huntite with Magnesite Hydroxide and Antimony Trioxide (Sb ₂ O ₃ )

* Stabilizer: Used by mixing lead stabilizer and metal carboxylate stabilizer

Measurement and evaluation of physical properties

Sheath material compositions were prepared using the components according to Examples (1-3) and Comparative Examples (1-3), and the sheath material compositions were kneaded for 20 minutes on an open roll of 140 ° C and then in a press at 170 ° C. 5 minutes was molded and cooled to prepare a specimen for measuring the physical properties.

Mass loss and flame retardance were tested for each of the specimens of the Examples and Comparative Examples, and the results are summarized in Table 2 below. Brief experimental conditions are as follows.

㉠ mass loss

Mass loss was assessed according to IEC 60811-3-2, and the specimen type was in accordance with IEC 60811-1-1, IEC 60811-1-9. First, the specimen was dried at room temperature for 20 hours and then weighed (B) and left for one week in an oven at 100 ° C., and then dried at room temperature for 20 hours and then the final weight (C) was measured. The cross-sectional area (A) of the specimen was obtained using the following equation. Mass loss should be less than 1.5 mg / cm ² .

*

In the above formula, δ means the average thickness of the specimen.

* Mass loss = (B-C) / A

㉡ flame retardant

The test was carried out at room temperature according to the test for flame retardancy (ASTMD 2863) and the oxygen index should be at least 28%.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Mass loss (mg / cm ² ) 0.606 0.908 1.161 0.378 1.516 1.87 Oxygen Index (%) 30 29 28.5 30 27 25.5

As summarized in Table 2, the specimens of Examples 1 to 3, in which the recycled plastic composition and the newborn plastic composition were properly mixed, satisfied the reference values in both mass loss and flame retardancy (oxygen index).

On the other hand, Comparative Example 2 and Comparative Example 3 did not satisfy the reference value in both mass loss and flame retardancy (oxygen index), and this result is due to excessive use of recycled plastic composition. In addition, Comparative Example 1 also satisfies the reference value in both mass loss and flame retardancy (oxygen index), but has a disadvantage in that the manufacturing cost is high because only the new plastic composition is used.

From these results, the cable having the sheath manufactured by the composition of the present invention not only satisfied the standard value in both mass loss and flame retardancy, but also reduced the manufacturing cost of the cable by using recycled plastic. This result was attributable to the production of the sheath material composition by mixing the recycled plastic composition and the newborn plastic composition in an appropriate mixing ratio.

As described above, optimal embodiments of the present invention have been disclosed. Although specific terms have been used in the specification including the present embodiment, it is only used for the purpose of describing the present invention to those skilled in the art in detail and used to limit the meaning or limit the scope of the present invention described in the claims. Make it clear.

Claims (8)

Consisting of a mixture of 20 to 70% by weight recycled plastic composition and 80 to 30% by weight new plastic composition,
The recycled plastic composition comprises 100 parts by weight of recycled plastic and 30 to 80 parts by weight of plasticizer,
The newborn plastic composition is a sheath material composition comprising 100 parts by weight of the new plastic, 30 to 80 parts by weight of plasticizer, 1 to 80 parts by weight of flame retardant and 1 to 15 parts by weight of a stabilizer. The method of claim 1,
The recycled plastic may be recycled poly vinyl chloride, recycled ethylene vinyl acetate, recycled polyethylene, recycled polypropylene, recycled polytetrafluoroethylene ), Recycled tetrafluoroethylene perfluoroalkylvinylether copolymer, recycled tetrafluoroethylene hexafluoropropylene copolymer, recycled ethylene tetrafluoroethylene copolymer (recycled ethylene tetrafluoroethylene copolymer, recycled polyvinylidenefluoride, recycled polyethylene terephthalate, recycled polybutylene terephthalate, recycled Lee ether ketone (recycled polyetherether keton), reproduction nylon 6 (recycled nylon 6) and reproducing nylon 66 (recycled nylon 66) as a sheath material composition, characterized in that at least one member selected from the group consisting of. The method of claim 1,
The new plastic is polyvinyl chloride, ethylene vinyl acetate, polyethylene, polypropylene, polytetrafluoroethylene, tetrafluoroethylene perfluoroalkyl Tetrafluoroethylene perfluoroalkylvinylether copolymer, tetrafluoroethylene hexafluoropropylene copolymer, ethylene tetrafluoroethylene copolymer, polyvinylidenefluoride, polyethylene tere At least one selected from the group consisting of phthalate (polyethylene terephthalate), polybutylene terephthalate, polyetherether keton, nylon 6 (nylon 6) and nylon 66 (nylon 66) Sheath material composition. The method of claim 1,
The plasticizer is a sheath material composition, characterized in that at least one selected from the group consisting of phthalic acid, trimellitic acid, phosphite, epoxy, polyester, aliphatic and anti-chlorine plasticizer. The method of claim 1,
The flame retardant is a sheath material composition, characterized in that at least one selected from the group consisting of a metal hydroxide, a mixture of huntite and magnesium hydroxide, antimony flame retardant, boron flame retardant, tin flame retardant and molybdenum flame retardant. 6. The method of claim 5,
The flame retardant is a sheath material composition, characterized in that the metal hydroxide surface-treated with at least one member selected from the group consisting of vinylsilane, fatty acid and aminosilane. The method of claim 1,
The stabilizer is a sheath material composition, characterized in that at least one selected from the group consisting of organotin stabilizer, carboxylic acid metal salt stabilizer, lead stabilizer, epoxy stabilizer and organic phosphite (phosphite). A cable comprising a sheath made by the sheath material composition according to claim 1.