Note: Descriptions are shown in the official language in which they were submitted.
CA 02836340 2013-12-10
LUMINOUS ELECTRIC WIRE
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an electric wire, in particular relates to a
luminous electric
wire.
Description of Related Art
The electric wires for conducting electric currents are generally applied in
the fields of
electric power, the telecommunication and in associate with the electric
current transfer. In many
places, there are multiple electric wires installed in pipelines with weak
lighting or without
lighting, for example electric wires in the mine pits or tunnels, and along
the subways. It is
always difficult to find and differentiate between wires during maintenance of
electric wires in
the dark.
Currently, luminous electric wires outer sheath with luminous pigments are
available in the
market. The method of manufacturing luminous electric wires involves with
mixing the plastic
resins, plastic additives and luminous powders, and processed by an extruding
processing. The
luminous pigments contain rare earth elements, and are easily contaminated by
metals then
turning darkened. Such luminous pigments have insufficient irradiating effects
and fail to provide
required irradiating levels.
SUMMARY OF THE INVENTION
The objective of the present invention is to provide a luminous electric wire
which is visible
in the night or darkness.
In order to achieve the above objective, the present invention provides a
luminous electric
wire comprising at least one conductor component surrounded by an outer
sheath, wherein the
outer sheath has at least one recess filled with luminous materials.
In an embodiment according to the present invention, the shape of the recess
is a stripe
CA 02836340 2013-12-10
along the direction of the length of the luminous electric wire. In another
embodiment, the shape
of the recess is a spiral stripe along the direction of the length of the
luminous electric wire. In
another embodiment, the shape of the recess is a semi-sphere.
In an embodiment according to the present invention, the outer sheath
comprises plastic
resins and plastic additives. The plastic resins are PVC, PE, PP, PS and PC.
The plastic additives
comprise stabilizers, plasticizers and flame retardants. In another
embodiment, the outer sheath
further comprises luminous pigments, and the outer sheath is an extruding
layer. The color of the
luminous pigments of the outer sheath and the color of the luminous materials
filled in the recess
are different. The coating is an extruding layer manufactured by extruding
molding. The
percentages of the luminous pigments and the plastic resins are 2w1%-1Owt%.
In an embodiment according to the present invention, the luminous pigments are
enveloped
in a film. In an embodiment according to the present invention, the luminous
materials in the
recess comprises luminous powders, wherein the luminous powders preferably are
enveloped in a
film.
Additionally, the present invention provides a method for manufacturing a
luminous electric
wire. The plastic resins and plastic additives are added to the mixers
according to a specific
percentage. A mixture A is obtained after high speed blending. A part of the
mixture A and a
definite quantity of the luminous powders enveloped in a film are mixed at low
speed and a
mixture B is obtained. The mixture B is put into a two screw-spindle extruding
machineto
produce mother particles by extruding and granulating. After the mother
particles are mixed
evenly with a definite quantity of resins., the resins and the mother
particles are put to the first
charging opening of the profile extruding machine for manufacturing luminous
materials used in
the outer sheath recess by extruding molding. The mixture A without the
luminous mother
particle is put to the second charging opening of the profile extruding
machine at the same time
for manufacturing the outer sheath having recess on the surface by extrusion.
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The luminous pigments and luminous powders used in the luminous electric wire
according
to the present invention are enveloped in a film, for avoiding the luminous
pigments and
luminous powders from contaminating by metals, and facilitating the luminous
electric wire to
achieve ideal luminous effects. Under the natural light, the fluorescent light
and ultraviolet, the
luminous electric wire of the present invention stores energy. After stop
receiving the light
illumination, the luminous materials with energy stored irradiate slowly in a
form of fluorescence,
which is visible in the night or the darkness and lasts for several hours or
more than ten hours,
which prevents from accidents caused by stumbling in the darkness.
BRIEF DESCRIPTION OF DRAWING
The novel features of the invention are set forth with particularity in the
appended claims.
The invention itself, however, may be best understood by reference to the
following detailed
description of the invention, which describes an exemplary embodiment of the
invention, taken in
conjunction with the accompanying drawings, in which:
Fig. 1 is a cross section schematic diagram of a luminous electric wire having
an outer
sheath with luminous materials of two long stripes according to an embodiment
of the present
invention;
Fig. 2 is a perspective schematic diagram of the luminous electric wire of
Fig. 1;
Fig. 3 is a cross section schematic diagram of a luminous electric wire having
an outer
sheath with luminous materials of multiple long stripes according to another
embodiment of the
present invention;
Fig. 4 is a cross section schematic diagram of a luminous electric wire having
an outer
sheath with luminous materials of spiral stripes according to the other
embodiment of the present
invention; and
Fig. 5 is a cross section schematic diagram of a luminous electric wire having
an outer
sheath with luminous materials of circle dots according to the other
embodiment of the present
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invention.
DETAILED DESCRIPTION OF THE INVENTION
In cooperation with attached drawings, the technical contents and detailed
description of the
present invention are described thereinafter according to a preferable
embodiment, being not used
to limit its executing scope. Any equivalent variation and modification made
according to
appended claims is all covered by the claims claimed by the present invention.
Fig. 1 is a cross section schematic diagram of a luminous electric wire coated
with luminous
materials of two long stripes according to an embodiment of the present
invention and Fig. 2 is a
perspective schematic diagram of the luminous electric wire of Fig. 1.
According to the present
invention, the luminous electric wire I comprises three conductor components
10 and an outer
sheath 20 for surrounding the conductor components 10. The outer sheath 20 has
two recesses
202. The recesses 202 are filled with luminous materials 30. According to the
present invention,
the recesses 202 are stripes along the direction of the length of the luminous
electric wire 1. The
conductor component 10 comprises copper conducting wires 102a and an
insulating layer 104 for
surrounding the copper conducting wires 102. Three conductor components 10 are
fixed by
fastening member 40. In addition, the luminous electric wire 1 of the present
invention
alternatively comprises an isolation layer 50 between the conductor component
10 and the outer
sheath 20. In order to make the luminous materials 30 more visible, the outer
sheath 20 further
installs more recesses 202 which receives more luminous materials filled in
the recesses 202 as
shown in Fig. 3.
In the other embodiment, the shape of the recess 202 of the present invention
is a spiral
stripe along the direction of the length of the luminous electric wire as
shown in Fig. 4. In another
embodiment, the recess 202 of the present invention is a semi-sphere as shown
in Fig. 5.
The method of manufacturing luminous electric wires is illustrated below. The
manufacturing method comprises steps: mixing materials, granulating and
extruding. In the
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mixing step, the plastic resins and additives are added to the mixing machine
by percentage and
mixed under high speed and the mixing is stopped when the temperature raises
to 50-80 C.
Consequently, a mixture A is obtained after the resins and the additives are
mixed evenly. A part
of the mixture A and a definite quantity of luminous powders enveloped in a
filmare mixed
evenly with low speed for enabling the luminous powders to stick to the
surface of the resins
evenly in order to obtain the mixture B. In the granulating step, the mixed
mixture B is put into a
two screw-spindle extruding machine for performing extruding and granulating.
After the
materials are extruded from the opening of the machine head, the extruded
materials are cooled
by water and granulated to generate mother particles for preceding the
following steps. In the
extruding step, the prepared mother particles and a definite quantity of
resins are mixed evenly to
add to the first charging opening of the profile extruding machine, and the
luminous materials
forming in the recess of the outer sheath are extruded. The mixture A without
the luminous
mother particles is added to the second charging opening of the profile
extruding machine, and
the outer sheath having the recesses formed in the surface is extruded.
(Embodiment 1)
100 kg of the PVC resin, 3 kg of the calcium/zinc stabilizer, 21 kg of the
DOTP, and 21 kg
of the DOA and 10 kg of the phosphoric ester flame retardant and are prepared
and mixed with
high speed for 30 minutes to obtain the mixtureA. Next, 78 kg of the mixture A
and 5 kg of the
luminous powders enveloped in a film are prepared and mixed with low speed for
10 minutes.
The materials are extruded from the mixing machine after the luminous powders
stick to the resin
particles evenly in order to obtain the mixture B. The mixture B is added to
the two screw-spindle
extruding machine and keep the working temperature at 180-220 C. The extruding
granulating
step is performed, where the materials are extruded from the machine head, the
extruded
materials are cooled by water and granulated to generate mother particles for
preceding the
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following steps. 10 kg of the mother particle and 10 kg of the PVC resin are
mixed evenly,
adding the above mixed materials to the first charging opening of the profile
extruding machine,
and the luminous materials forming in the recess of the outer sheath are
extruded. The mixture A
without the luminous mother particles is added to the second charging opening
of the profile
extruding machine, and the outer sheath having the recesses formed in the
surface is extruded.
(Embodiment 2)
100 kg of the PVC resin, 3 kg of the calcium/zinc stabilizer, 21 kg of the
DOTP, and 21 kg
of the DOA and 10 kg or the phosphoric ester flame retardant are prepared and
mixed at a high
speed for 30 minutes to obtain the mixture A. Then 50 kg of the mixture A and
3 kg of yellow
green light luminous powders enveloped in a film are prepared and mixed in a
low speed for 10
minutes. Extruding the materials from the mixing machine after the luminous
powders stick to
the resin particles evenly in order to obtain the mixture B. 50 kg of the
mixture A and 3 kg of blue
green light luminous powders enveloped in a filmare prepared and mixed in a
low speed for 10
minutes. The materials are discharged from the mixing machine after the
luminous powders stick
to the resin particles evenly in order to obtain the mixture C.
The mixture B is added to the two screw-spindle extruding machine and the
working
temperature is kept at 180-220 C. The extruding granulating step is performed,
where the
materials are extruded from the machine head, the extruded materials are
cooled by water and
granulated to generate mixture B mother particles for preceding the following
steps. Additionally,
The mixture C is added to the two screw-spindle extruding machine and the
working temperature
is kept at 180-220 C. The extruding granulating step is performed, where the
materials are
extruded from the machine head, the extruded materials are cooled by water and
granulated to
generate mixture C mother particles for preceding the following steps.
10 kg of the mixture B mother particle and 10 kg of the PVC resin are mixed
evenly and
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added into the first charging opening of the profile extruding machine, and
the luminous
materials for filling into the recess of the are extruded. 10 kg of the
mixtureC mother particle and
50 kg of the PVC resin are mixed evenly and put into the second charging
opening of the profile
extruding machine at the same time, and the outer sheath having recesses on
the surface is
extruded.
In the mixtures, phosphoric flame retardants are used, for example liquid
phosphoric ester
flame retardants, which may provide good flame retardance and suited for using
in resins such as
PVC and synthetic rubbers in order to increase the flame resistance and the
plasticity, and
phosphoric flame retardants do not include halogens. Additionally, the
terephthalate plasticizers
(DOTP) used in the mixtures have good heat resistance, good electricity
tolerance, low volatility,
good compatibility, and are particularly suitable to use in high insulative
PVC cable products
(70-90 C). DOA is a typical industrial plasticizer which has good cold
tolerance, high heating
plasticizing efficiency, and low thermochromatism. The products made with DOA
have good
flexibility in low temperature and lightfastness. The luminous electric wires
of the present
invention may completely comply with ROHS & REACH environmental requirements.
The luminous pigments and luminous powders used in the luminous electric wire
according
to the present invention are enveloped in a film, for avoiding the luminous
pigments and
luminous powders from contaminating by metals, and facilitating the luminous
electric wire to
achieve ideal luminous effects. Under the natural light, the fluorescent light
and ultraviolet, the
luminous electric wire of the present invention stores energy. After stop
receiving the light
illumination, the luminous materials with energy stored irradiate slowly in a
form of fluorescence,
which is visible in the night or the darkness and lasts for several hours or
more than ten hours,
which prevents people from accidents caused by stumbling in the darkness.
As the skilled person will appreciate, various changes and modifications can
be made to the
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described embodiments. It is intended to include all such variations,
modifications and
equivalents which fall within the scope of the invention, as defined in the
accompanying claims.
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