CN104078103A - Insulation reinforcing mat for cable and preparing method thereof - Google Patents
Insulation reinforcing mat for cable and preparing method thereof Download PDFInfo
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- CN104078103A CN104078103A CN201410338176.8A CN201410338176A CN104078103A CN 104078103 A CN104078103 A CN 104078103A CN 201410338176 A CN201410338176 A CN 201410338176A CN 104078103 A CN104078103 A CN 104078103A
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Abstract
The invention relates to an insulation reinforcing mat for a cable and a preparing method thereof. The mat is formed by mixing 80-92% of glass fiber water drawing wires and 8-20% of CO-PET/PET fiber by weight. The preparing method comprises the steps of raw material beating, mixing, matching, forming and finished product collecting. In the adopted material and in the machining process, no adhesive is added, and therefore the insulation reinforcing mat for the cable has the advantages of being uniform in thickness and mass area ratio, high in insulating coefficient, good in heat-bonding effect and the like.
Description
Technical field
The present invention relates to insulation reinforcement mat and preparation method thereof for cable, it applies to the mica tape that is compounded to form with cable mica tape, to enhance product performance.
Background technology
The evolution of electric wire is in fact the process that material updates.Along with scientific and technological development, people have higher requirement to the physical and mechanical properties of insulating material and fire resistance, and existing rubber or plastic insulation cannot meet market demands.Mica has good thermal endurance, and the mica tape of especially making with supporting material, more and more as the lapped insulation of electric wire.
Mica tape is a kind of composite insulating material, mainly three kinds of materials, consists of: dielectric material, supporting material, adhesive.In existing technology, do not have a kind of supporting material, have the effect of supporting material mechanical performance and mica tape adhesive concurrently, the production of mica tape is all by adhesive, dielectric material and supporting material to be bonded together, the process of a gluing of this process need, has strengthened production cost.
In existing mat supporting material preparation; after great majority adopt raw material to mix, making beating is stirred; after gluing, enter the drying semi-finished product that become of forming net; then rolling is finished product; in this traditional preparation technology, often there will be making beating to stir inhomogeneous, having wadding fibrously in slurry, slurry is squeezed into moulding guipure middle berth by pump and is established inhomogeneous; cause the became uneven of wet felt even, directly affect the quality of mat finished product.And the mat of producing by chemical adhesive, its hot-face insulation performance cannot be met the need of market.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and have thickness, mass area ratio is even, insulating coefficient is high, insulation reinforcement mat and preparation method thereof for cable that heat bonding is effective.
For achieving the above object, the technical solution used in the present invention is: insulation reinforcement mat for a kind of cable, be applied to compound with cable mica tape, according to mass percent, calculate, the glass fibre water wire drawing by 80～92% and 8～20% CO-PET/PET fiber are mixed;
Described CO-PET/PET fiber is two component composite short fibers, take CO-PET material as cortex and PET material be sandwich layer, fibre diameter is 6～12um.
As a further improvement on the present invention: in order to control the intensity of material and the uniformity of mass area ratio, the diameter of described glass fibre water wire drawing is 8～12um; The diameter of described CO-PET/PET fiber is 6～12um.
As the preferred embodiments of the present invention: described mat grammes per square metre is 30g/m
2～60 g/m
2.
The method of preparing cable use insulation reinforcement mat the present invention relates to, is specially:
A, raw material making beating: according to mass percent proportioning, after 80～92% glass fibre water wire drawing and each self-weighing of CO-PET/PET fiber of 8～20%, pour into respectively in making beating storage tank separately, the concentration of glass fibre water wire drawing slurry and CO-PET/PET fibre stuff is diluted to respectively to 0.2%-0.35% in making beating storage tank and carries out high speed making beating, then again glass fibre water wire drawing slurry poured in another making beating storage tank and carried out pulling an oar and disperseing at a high speed for the second time;
B, mixing match: above-mentioned two kinds of slurries are mixed; Mixed slurry stirs under lower-speed state;
C, moulding: be specially the entrance point that above-mentioned mixed slurry is delivered to slurry disperser, make mixed slurry flow out and be evenly distributed in moulding guipure from the port of export of disperser, moulding guipure enters oblique net formula Dewatering case under the drive of drive system, forms uniformly wet felt after Dewatering; The moulding guipure with wet felt enters negative suction system under the drive of drive system, carry out after 1～2 road negative pressuren zone suction, enter wet felt device for spraying surface, and then carry out the moisture of the wet felt of 1～2 road negative pressuren zone suction, after control moisture content to 45～55%, enter drying unit; Drying unit adopts hot air circulation form, and heating is controlled between 100 ℃～190 ℃ with multistage subregion temperature, guarantees the wet felt moisture content < 0.6% after drying;
D, finished product collection.
As the preferred embodiments of the present invention: in making beating storage tank, the rotating speed of making beating is 700～1000r/min at a high speed.
The present invention takes full advantage of two characteristics of two kinds of fiber materials in CO-PET/PET fiber, because CO-PET fusing point in CO-PET/PET fiber is 110 ℃ of left and right, PET fusing point is 255 ℃ of left and right, thereby make to utilize in process of production the low melting point characteristic of CO-PET/PET fiber, with its bonding glass fiber water wire drawing, form mat, avoided use adhesive; And when cable high-temperature adstante febre, utilize high-melting-point characteristic and the mica tape close adhesion of PET material, improve its heat conductivility.
The cable the present invention relates to does not add any adhesive with insulation reinforcement mat in materials and the course of processing, has improved insulating coefficient and the heat conductivility of product.
In insulation reinforcement mat preparation process of the present invention, there is following advantage:
1, because raw material are pulled an oar at a high speed separately, particularly the wire drawing of glass fibre water forms monofilament shape after making beating dispersion at a high speed through twice, then mixes again, has avoided like this two kinds of fibers to pull an oar simultaneously and has mixed the easy situation that is not easy dispersion that is wound around that produces.
2, high speed making beating of the present invention is to be rotated by high speed agitator, rotating speed is controlled at 700～1000r/min, produces stronger shearing force after the water rotating percussion that makes to pull an oar in storage tank, and fiber can fully be disperseed, raw material are more even, for the uniformity of follow-up formation wet felt lays the foundation.
3, in moulding drying course according to the principle of gravity dehydration, moulding guipure carries out Dewatering control in moulding casing, makes the thickness of the arrangement mode of fiber in forming process and felt more even, to meet the processability requirement of rear road product.
4, the wet felt after moulding, first through a vaporific spray equipment, carries out atomization to the wet felt after dehydration forming, to increase wet felt sweat rate, makes wet felt surface short glass fiber there will not be the phenomenon of establishing, and surface more smooth.
5, drying system adopts hot air circulation form, the wet felt that enters baking oven does not contain the material of chemical adhesive class, is mainly that the moisture in felt body is fully volatilized, and impels CO-PET/PET fibrocortex CO-PET fusing, better bonding with glass fibre, and then improve mat intensity.
6, heating is controlled with multistage subregion temperature, guarantees the felt surfacing after drying, even thickness and felt moisture content < 0.6%.
7, it is high that the preparation method who the present invention relates to has production efficiency, and product thickness, mass area ratio are even, the advantage that insulating coefficient is high, heat bonding is effective.
The present invention, as mica tape supporting material, has the effect of supporting material and binder concurrently.
Embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1,
Take and produce cable that every square meter quality is 40g and the present invention is described in further detail as example with insulation reinforcement mat.
Insulation reinforcement mat for above-mentioned cable, comprises the wire drawing of glass fibre water, CO-PET/PET fiber, and its weight ratio is 92:8.
CO-PET/PET fiber is two component composite short fibers, take CO-PET material as cortex and PET material be sandwich layer, fibre diameter is 8um, wherein CO-PET material melting point is 110 ℃, PET material is 252 ℃.The diameter of glass fibre water wire drawing is 10um.
The method of preparing above-mentioned mat in the present embodiment, specifically in turn includes the following steps:
The first step: by the wire drawing of raw material glass fibre water, CO-PET/PET fiber is weighed according to mass percent 92:8 proportioning;
Every square meter quality is 40g, speed of production 20m/min, and width is 1.25m.According to slurry concentration, calculating total starching flow is 800L/min, and wet end furnish is as follows:
Through automatic Weighing transport tape, pour the wire drawing of glass fibre water into the high speed storage tank of pulling an oar, in a high speed is pulled an oar storage tank, mixed being incorporated in water of water that the wire drawing of glass fibre water and a high speed are pulled an oar in storage tank broken up and is glass fibre water wire drawing slurry, the weight ratio that the wire drawing of glass fibre water mixes with water is 2/1000, be that slurry concentration is 0.2%, fibre-bearing 2kg in 1000L water, making beating rotating speed is 780 r/min, simultaneously described glass fibre water wire drawing slurry enters No. two high speeds tank of pulling an oar with the flow of 600～1000L/min, in No. two high speeds are pulled an oar storage tank, the dispersion of pulling an oar for the second time, making beating rotating speed is 800 r/min.
Pouring raw material CO-PET/PET fiber into No. three high speeds pulls an oar in storage tank, in No. three high speeds are pulled an oar storage tank, mixed being incorporated in water of water that CO-PET/PET fiber and No. three high speeds are pulled an oar in storage tank broken up and is CO-PET/PET fibre stuff, the weight ratio that CO-PET/PET fiber mixes with water is 1/500, be that slurry concentration is 0.2%, fibre-bearing 2kg in 1000L water, making beating rotating speed is 780 r/min.
Above-mentioned glass fibre water wire drawing slurry and CO-PET/PET fibre stuff are uniformly mixed in the first agitator tank; Speed of agitator is 250～300r/min;
Raw material are preliminary to be mixed slurry after mixing and to enter the second agitator tank with the flow of 600～1000L/min; In the second agitator tank, agitator tank rotating speed is 100～150r/min, and above-mentioned slurry is stirred and is the mat slurry with homogeneous mixture, and through mashing pump, squeezes into the slurry disperser of formation system with the flow of 800L/min.
The mat slurry with the flow of 800L/min is driven into slurry disperser, and after flowing out, evenly shakedown is dispersed on dehydration forming guipure, makes next step dehydration forming effective;
The moulding guipure that is evenly distributed with mat slurry enters oblique net formula Dewatering case under the drive of drive system, utilizes gravity natural-dehydration, enters and forms uniformly wet felt material after Dewatering;
The moulding guipure with wet felt material is introduced into negative suction system under the drive of drive system, through 1～2 road negative pressuren zone, the moisture of the wet felt material of suction, enter wet felt device for spraying surface, utilize spraying that the vertical shape fiber on wet felt material surface is from the teeth outwards calm, wet felt surfacing after making to dry, quality are even.And then enter negative suction system, and through 1～2 road negative pressuren zone, the moisture of the wet felt material of suction, makes its moisture content even, and moisture content to 45～55%, enters drying unit.
The described wet felt through suction moisture enters drying unit and dries and form mat semi-finished product through preheating, classification; Described drying unit adopts hot air circulation form, mainly that the moisture in wet felt is fully volatilized, and impel CO-PET/PET fibrocortex CO-PET to melt, better bonding with glass fibre, and then raising mat intensity, heating is controlled between 100 ℃～190 ℃ with multistage subregion temperature, guarantees the felt moisture content < 0.6% after drying.
Described finished product collection is by designing requirement trimming, to be finished product by the mat semi-finished product after drying, and control gate width is 1250mm, and mat finished product enters rolling coil replacing mechanism, finally warehouse-in.
In the manufacture method process of patent of the present invention, can be after slurry pulping disperses in proportioning mixings of weighing, after also can weighing as the embodiment first step making beating disperse, mixing, it all belongs to protection scope of the present invention.
Claims (5)
1. an insulation reinforcement mat for cable, is applied to compound with cable mica tape, it is characterized in that: according to mass percent, calculate, the glass fibre water wire drawing by 80～92% and 8～20% CO-PET/PET fiber are mixed; Described CO-PET/PET fiber is two component composite short fibers, take CO-PET material as cortex and PET material be sandwich layer, fibre diameter is 6～12um.
2. insulation reinforcement mat for cable according to claim 1, is characterized in that: the diameter of described glass fibre water wire drawing is 8～12um; The diameter of described CO-PET/PET fiber is 6～12um.
3. insulation reinforcement mat for cable according to claim 1, is characterized in that: described mat grammes per square metre is 30g/m
2～60 g/m
2.
4. prepare a method for insulation reinforcement mat for cable as claimed in claim 1, it is characterized in that:
A, raw material making beating: according to mass percent proportioning, after 80～92% glass fibre water wire drawing and each self-weighing of CO-PET/PET fiber of 8～20%, pour into respectively in making beating storage tank separately, the concentration of glass fibre water wire drawing slurry and CO-PET/PET fibre stuff is diluted to respectively to 0.2%-0.35% in making beating storage tank and carries out high speed making beating, then again glass fibre water wire drawing slurry poured in another making beating storage tank and carried out pulling an oar and disperseing at a high speed for the second time;
B, mixing match: above-mentioned two kinds of slurries are mixed; Mixed slurry stirs under lower-speed state;
C, moulding: be specially the entrance point that above-mentioned mixed slurry is delivered to slurry disperser, make mixed slurry flow out and be evenly distributed in moulding guipure from the port of export of disperser, moulding guipure enters oblique net formula Dewatering case under the drive of drive system, forms uniformly wet felt after Dewatering; The moulding guipure with wet felt enters negative suction system under the drive of drive system, carry out after 1～2 road negative pressuren zone suction, enter wet felt device for spraying surface, and then carry out the moisture of the wet felt of 1～2 road negative pressuren zone suction, after control moisture content to 45～55%, enter drying unit; Drying unit adopts hot air circulation form, and heating is controlled between 100 ℃～190 ℃ with multistage subregion temperature, guarantees the wet felt moisture content < 0.6% after drying;
D, finished product collection.
5. preparation method according to claim 4, is characterized in that: in making beating storage tank, the rotating speed of making beating is 700～1000r/min at a high speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338176.8A CN104078103A (en) | 2014-07-16 | 2014-07-16 | Insulation reinforcing mat for cable and preparing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338176.8A CN104078103A (en) | 2014-07-16 | 2014-07-16 | Insulation reinforcing mat for cable and preparing method thereof |
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| CN104078103A true CN104078103A (en) | 2014-10-01 |
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| CN201410338176.8A Pending CN104078103A (en) | 2014-07-16 | 2014-07-16 | Insulation reinforcing mat for cable and preparing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419590A (en) * | 2017-08-07 | 2017-12-01 | 江苏大利节能科技股份有限公司 | A kind of double composition glass fibres apply plate material and preparation method thereof |
| CN115464951A (en) * | 2022-08-22 | 2022-12-13 | 江苏长海复合材料股份有限公司 | Oil-water separation felt and preparation method thereof |
| CN115748243A (en) * | 2022-11-15 | 2023-03-07 | 山东鲁阳节能材料股份有限公司 | High-temperature-resistant wet fiber blanket felt and preparation method thereof |
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| US20030211799A1 (en) * | 2001-04-20 | 2003-11-13 | Porex Corporation | Functional fibers and fibrous materials |
| CN101098741A (en) * | 2004-11-05 | 2008-01-02 | 唐纳森公司 | Filter medium and structure |
| CN101160425A (en) * | 2004-12-28 | 2008-04-09 | 欧文科宁知识产权资产有限公司 | Polymer/wucs mat for use in automotive applications |
| CN103332922A (en) * | 2013-07-17 | 2013-10-02 | 江苏常科新材料有限公司 | Heat preservation core material for insulation and method for preparing core material |
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2014
- 2014-07-16 CN CN201410338176.8A patent/CN104078103A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030211799A1 (en) * | 2001-04-20 | 2003-11-13 | Porex Corporation | Functional fibers and fibrous materials |
| CN101098741A (en) * | 2004-11-05 | 2008-01-02 | 唐纳森公司 | Filter medium and structure |
| CN101160425A (en) * | 2004-12-28 | 2008-04-09 | 欧文科宁知识产权资产有限公司 | Polymer/wucs mat for use in automotive applications |
| CN103332922A (en) * | 2013-07-17 | 2013-10-02 | 江苏常科新材料有限公司 | Heat preservation core material for insulation and method for preparing core material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419590A (en) * | 2017-08-07 | 2017-12-01 | 江苏大利节能科技股份有限公司 | A kind of double composition glass fibres apply plate material and preparation method thereof |
| CN115464951A (en) * | 2022-08-22 | 2022-12-13 | 江苏长海复合材料股份有限公司 | Oil-water separation felt and preparation method thereof |
| CN115748243A (en) * | 2022-11-15 | 2023-03-07 | 山东鲁阳节能材料股份有限公司 | High-temperature-resistant wet fiber blanket felt and preparation method thereof |
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Application publication date: 20141001 |