CN104795151A - High anti-interference phone incoming line - Google Patents

Abstract

The invention discloses a high anti-interference phone incoming line which comprises two round copper conductors. The two wires are stranded to form a stranded wire pair. A polyvinyl chloride layer is coated on the outer surface of aluminum foil, a polyvinyl chloride sleeve layer is coated on the outer surface of the polyvinyl chloride layer, and a middle tensile layer is arranged between the polyvinyl chloride layer and the polyvinyl chloride sleeve layer. The middle tensile layer is composed by 100 parts of polyamide 6 resins, 28-32 parts of polyhexamethylene sebacamide, 10-15 parts of ethylene and norbornene copolymer, 2.8-3.5 parts of maleic anhydride stem grafting amorphous polyolefin, 1-1.2 parts of N, N'-two (beta-naphthyl) p-phenylenediamine, 0.5-0.8 part of polyethylene wax, 0.8-1.2 parts of polyethylene glycol and 0.5-0.8 part of acetic acid glyceride. The high anti-interference phone incoming line reduces the interference on signal transmission and improves the tensile strength remarkably.

Description

High anti-interference type phone lead-in

Technical field

The present invention relates to a kind of phone lead-in, particularly relate to a kind of high anti-interference type phone lead-in.

Background technology

Traditional telephone wire has two cores and four-core, and core line diameter has 0.4 ~ 1.0mm respectively, and its structure is generally two or four heart yearn outer wrapping polyethylene, and common heart yearn material is copper etc.Existing its hot strength of telephone wire structures shape is limited, when the long distance of needs is installed, need to arrange wirerope specially to strengthen, otherwise easily break, particularly when some ungetable areas are installed as mountain area, the difficulty that wirerope significantly increases construction is set specially, and easily damages, and electric property improves limited.

Summary of the invention

The invention provides a kind of high anti-interference type phone lead-in, this high anti-interference type phone lead-in decreases the interference to Signal transmissions, and tensile strength is significantly improved.

For achieving the above object, the technical solution used in the present invention is: a kind of high anti-interference type phone lead-in, comprise 2 circular copper conductors, this circular copper conductors outer surface is coated with polyethylene layer and forms wire, 2 described wire strandings form twisted wire pair, one aluminium foil wrapped in described twisted wire to outer surface, one polyvinyl chloride layer is coated on described aluminium foil outer surface, one pe sheath layer is coated on described polyvinyl chloride layer outer surface, is provided with middle tensile layer between described polyvinyl chloride layer, pe sheath layer;

Described middle tensile layer is composed of the following components:

Polyamide 6 100 parts,

Polyhexamethylene sebacamide 28 ~ 32 parts,

Ethene and norbornene copolymer 10 ~ 15 parts,

Maleic anhydride graft amorphous polyolefin 2.8 ~ 3.5 parts,

N, N'-bis-(betanaphthyl) p-phenylenediamine (PPD) 1 ~ 1.2 part,

Tissuemat E 0.5 ~ 0.8 part,

Polyethylene glycol 0.8 ~ 1.2 part,

Acetin 0.5 ~ 0.8 part;

Described polyamide 6 relative viscosity is below 2.5;

Described ethene and norbornene copolymer density are 1.01 ± 0.01g/cm ³;

Described maleic anhydride graft amorphous polyolefin by unformed polyolefin, maleic anhydride, initator and lubricant 100:0.4 ~ 3:0.03 in proportion ~ 1:0.1 ~ 0.3 render to double screw extruder carry out glycerol polymerization obtain, its percent grafting is 0.8% ~ 1.5%, and its melt index is 1 ~ 10g/10min.

In technique scheme, further improvement opportunity scheme is as follows:

1., in such scheme, the Thickness Ratio of described polyvinyl chloride layer and middle tensile layer is 10:4 ~ 6.

2., in such scheme, the Thickness Ratio of described pe sheath layer and middle tensile layer is 10:4 ~ 6.

Because technique scheme is used, the present invention compared with prior art has following advantages:

Height anti-interference type phone lead-in of the present invention, it is provided with middle tensile layer between polyvinyl chloride layer, pe sheath layer, this middle tensile layer adopts polyamide 6 100 parts, polyhexamethylene sebacamide 28 ~ 32 parts, ethene and norbornene copolymer 10 ~ 15 parts, maleic anhydride graft amorphous polyolefin 2.8 ~ 3.5 parts, N, N'-bis-(betanaphthyl) p-phenylenediamine (PPD) 1 ~ 1.2 part, in conjunction with aluminum foil shielded, decrease the interference to Signal transmissions, tensile strength is significantly improved; Secondly, its middle tensile layer adds Tissuemat E 0.5 ~ 0.8 part, polyethylene glycol 0.8 ~ 1.2 part, acetin 0.5 ~ 0.8 part further, both high anti-interference type phone lead-in mechanical strength, bending property had been improve, turn improve the bonding force between polyvinyl chloride layer, pe sheath layer, middle tensile layer, avoid in construction and occur lamination.

Accompanying drawing explanation

Accompanying drawing 1 is height anti-interference type phone lead-in structural representation of the present invention.

In above accompanying drawing: 1, circular copper conductors; 2, polyethylene layer; 3, wire; 4, twisted wire pair; 5, aluminium foil; 6, polyvinyl chloride layer; 7, pe sheath layer; 8, middle tensile layer.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described:

Embodiment 1 ~ 5: a kind of high anti-interference type phone lead-in, comprise 2 circular copper conductors 1, this circular copper conductors 1 outer surface is coated with polyethylene layer 2 and forms wire 3,2 stranded formation twisted wires of described wire 3 are to 4, one aluminium foil 5 wrapped in described twisted wire to 4 outer surfaces, one polyvinyl chloride layer 6 is coated on described aluminium foil 5 outer surface, and a pe sheath layer 7 is coated on described polyvinyl chloride layer 6 outer surface, is provided with middle tensile layer 8 between described polyvinyl chloride layer 6, pe sheath layer 7;

Above-mentioned polyvinyl chloride layer 6 is 10:5 or 10:5.5 with the Thickness Ratio of middle tensile layer 8, and above-mentioned pe sheath layer 7 is 10:4.5 or 6 with the Thickness Ratio of middle tensile layer 8.

Above-described embodiment 1 ~ 5 middle tensile layer 8 is composed of the following components, as shown in table 1:

Table 1

Above-mentioned polyamide 6 relative viscosity is below 2.5;

Above-mentioned ethene and norbornene copolymer density are 1.01 ± 0.01g/cm ³;

Above-mentioned maleic anhydride graft amorphous polyolefin by unformed polyolefin, maleic anhydride, initator and lubricant 100:0.4 ~ 3:0.03 in proportion ~ 1:0.1 ~ 0.3 render to double screw extruder carry out glycerol polymerization obtain, its percent grafting is 0.8% ~ 1.5%, and its melt index is 1 ~ 10g/10min.

In embodiment 1 ~ 5 high anti-interference type phone lead-in, the first restrictive coating performance is in table 2:

Table 2

The actual shielding factor of this enforcement cable is no more than 0.65, well can shield extraneous interference in transmission signal process, improves call and signal quality.

Embodiment of the present invention electric property contrast (for 0.5mm conductor) as shown in table 3 below:

Table 3

When adopting above-mentioned high anti-interference type phone lead-in, decrease the interference to Signal transmissions, tensile strength is significantly improved; Secondly, its middle tensile layer adds Tissuemat E 0.5 ~ 0.8 part, polyethylene glycol 1.8 ~ 2.2 parts, acetin 0.5 ~ 0.8 part further, both high anti-interference type phone lead-in mechanical strength, bending property had been improve, turn improve the bonding force between polyvinyl chloride layer, pe sheath layer, middle tensile layer, avoid in construction and occur lamination.

Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (3)

1. one kind high anti-interference type phone lead-in, it is characterized in that: comprise 2 circular copper conductors (1), this circular copper conductors (1) outer surface is coated with polyethylene layer (2) and forms wire (3), 2 stranded formation twisted wires of described wire (3) are to (4), one aluminium foil (5) wrapped in described twisted wire to (4) outer surface, one polyvinyl chloride layer (6) is coated on described aluminium foil (5) outer surface, one pe sheath layer (7) is coated on described polyvinyl chloride layer (6) outer surface, described polyvinyl chloride layer (6), middle tensile layer (8) is provided with between pe sheath layer (7),

Described middle tensile layer (8) is composed of the following components:

Polyamide 6 100 parts,

Polyhexamethylene sebacamide 28 ~ 32 parts,

Ethene and norbornene copolymer 10 ~ 15 parts,

Maleic anhydride graft amorphous polyolefin 2.8 ~ 3.5 parts,

N, N'-bis-(betanaphthyl) p-phenylenediamine (PPD) 1 ~ 1.2 part,

Tissuemat E 0.5 ~ 0.8 part,

Polyethylene glycol 0.8 ~ 1.2 part,

Acetin 0.5 ~ 0.8 part;

Described polyamide 6 relative viscosity is below 2.5;

Described ethene and norbornene copolymer density are 1.01 ± 0.01g/cm ³;

Described maleic anhydride graft amorphous polyolefin by unformed polyolefin, maleic anhydride, initator and lubricant 100:0.4 ~ 3:0.03 in proportion ~ 1:0.1 ~ 0.3 render to double screw extruder carry out glycerol polymerization obtain, its percent grafting is 0.8% ~ 1.5%, and its melt index is 1 ~ 10g/10min.

2. high anti-interference type phone lead-in according to claim 1, is characterized in that: described polyvinyl chloride layer (6) is 10:4 ~ 6 with the Thickness Ratio of middle tensile layer (8).

3. high anti-interference type phone lead-in according to claim 1, is characterized in that: described pe sheath layer (7) is 10:4 ~ 6 with the Thickness Ratio of middle tensile layer (8).