CN101705059B - Making method of non-inflammable self-adhesion insulation tape - Google Patents
Making method of non-inflammable self-adhesion insulation tape Download PDFInfo
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- CN101705059B CN101705059B CN200910213876A CN200910213876A CN101705059B CN 101705059 B CN101705059 B CN 101705059B CN 200910213876 A CN200910213876 A CN 200910213876A CN 200910213876 A CN200910213876 A CN 200910213876A CN 101705059 B CN101705059 B CN 101705059B
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Abstract
The invention relates to a making method of a non-inflammable self-adhesion insulation tape. The making method comprises the following steps: by making colored polytetrafluoroethylene dispersion resin, sieving the colored polytetrafluoroethylene dispersion resin after cold storage, then mixing with propellant as paste shape and finally making the insulation tape through the steps of curing, preforming, thrusting, rolling, removing the propellant and the like. The made non-inflammable self-adhesion insulation tape is excellent in comprehensive performance with limited oxygen index up to over 95 and has non-flammable property, volume resistance no less than 1 multiplied by 1, 017 ohm/cm, good insulating performance, good self-adhesion without use of pressure sensitive adhesive, reliable adhesion between tape layers and at a port, water absorption rate less than 0.01 percent and good moisture resistance. The insulation tape can be used within the temperature range of -65-250 DEGC for long time with the dielectric strength not less than 40kV/mm, can resist strong acid, alkali and oxidant, is an ideal insulating material and promotes the replacement of insulating materials of traditional electrician equipment with new generations.
Description
Technical field
The present invention relates to a kind of insulation tape, be specially a kind of making method of non-inflammable self-adhesion insulation tape.
Background technology
Insulation tape refers to specially that the electrician uses is used to prevent electric leakage, plays the adhesive tape of insulating effect, is applicable to the plugging into of electric wire, electric insulation protection.The present widely used insulation tape of forming by SE base band and pressure-sensitive adhesive layer, and this kind insulation tape is not enough below existing: 1, the flame resistivity of SE is poor, and fire-retardant value is merely 40; 2, temperature tolerance is poor, and softening temperature is 80 ℃, begins to decompose variable color in 130 ℃; 3, stability to aging is poor, autocatalytically decomposition easily, variable color, and physical and mechanical properties and insulating property descend rapidly.4, have certain resistance to chemical corrosion, but a rather unstable, 5, the pressure sensitive adhesive easy ageing, cause the insulation layer parcel to unclamp.
The development of insulation tape and the level of exploitation are one of influence restriction electrotechnology development key, therefore have high pressure resistant, high-low temperature resistant, corrosion-resistant, the insulation tape that excellent properties such as do not fire, are the needs of insulation industry historical development trend.The teflon insulation adhesive tape can remedy the defective of above-mentioned insulation tape.But have the color separation needs of different purposes as insulation paste, and tetrafluoroethylene having not viscosity, is unusual difficulty so make it painted.Traditional method is to adopt polytetrafluoroethyldispersion dispersion resin and pigment to be formed by directly mixing colored polytetrafluoroethyldispersion dispersion resin; But it is inhomogeneous that this kind mode is mixed; Cause the arbitrary component conglomeration of resin and pigment or disperse uneven; The product of making can form that the resin network is discontinuous, the phenomenon of pigment concentration of local, directly influences the insulating property of finished product.
Summary of the invention
The objective of the invention is deficiency to the above insulation tape existence; Give full play to the characteristic of tetrafluoroethylene; A kind of making method with good electric insulativity, proof voltage, high-low temperature resistant, ageing-resistant, a kind of non-inflammable self-adhesion insulation tape of excellent performance such as not firing is provided, for electrical isolation provides utmost point desirable material.
The present invention is achieved in that a kind of making method of non-inflammable self-adhesion insulation tape, and it making step that comprises is following:
One, the making of polytetrafluoroethyldispersion dispersion resin
With concentration be 60%, pH value is that 7～10 polytetrafluoroethyldispersion dispersion 100～140 parts by weight, zero(ppm) water 140～180 parts by weight, high boiling solvent 20～35 parts by weight and pigment 8～14 parts by weight add in the mixing tank and stir, add the mixed solvent of forming by water 70～90 parts by weight and acetone 50～80 parts by weight then and carry out condensation; Through condensation; Become 0.1～0.2 micron primary particles aggregate 450 microns secondary particle; At last condensate is filtered and under 90～130 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin, the resin color homodisperse that present method makes; Electrical property is splendid, and its viscosity also promotes 50% than common polytetrafluoroethyldispersion dispersion resin.
Two, paste shape moulding
1, the colored polytetrafluoroethyldispersion dispersion resin that obtains more than the general refrigerates 20～24h at 8～15 ℃, at dust-free workshop raw material is sieved with 8～10 purpose sieves then, to stop the influence of dust to electrical property.
2, colored polytetrafluoroethyldispersion dispersion resin and the boosting agent after will sieving is mixed into the paste shape, leaves standstill 10～15 (12) h; The parts by weight proportioning of colored polytetrafluoroethyldispersion dispersion resin and boosting agent is: colored polytetrafluoroethyldispersion dispersion resin 60～90, boosting agent 20～30.Described boosting agent can be for taking off aromatic hydrocarbon solvent oil EXXSOL D60.
3, leave standstill after, compound is stirred, rotating speed is 15～20r/min, the time is 10～20min; Make boosting agent and starting material uniform mixing.
4, the raw material that stirs leaves standstill 10～12h, and the boosting agent is permeated to starting material, carries out maturation process at 50 ℃～70 ℃ then, and the time is 20～24h; Maturation process can be in baking oven, to carry out slaking, and the purpose of slaking is to make the boosting agent to further fully infiltration of starting material through heating.
5, be 2.5～3.8Mpa at pressure; Compression speed is 45～75mm/min, and the dwell time is premolding under 1～8min, makes blank; Preformed equipment can be hydraulic power unit, about the diameter little 1mm of the diameter in its blank chamber than pushing material chamber.
6, blank is pushed, through cutting into fibre strip; A pushing mouthful mould material cavity temperature is controlled at 50 ℃～70 ℃, and the cone angle of the pushing mould that pushes is 30～45 degree, and compression ratio is 80～130; Wherein, compression ratio is the sectional area (S) in material chamber and the ratio of the sectional area (S ') of mouthful mould.
7, fibre strip is carried out two roll-ins and prolong, roller temperature is controlled at 50 ℃～70 ℃ during calendering, and calender speed is controlled at 0.5～5m/min, and the power that in the roller operation process, produces makes fiber be oriented flat sheet prefabrication along working direction, and rolling is neat;
8, the boosting agent in the flat sheet prefabrication of processing through calendering is removed, temperature is controlled at 100～200 ℃, and too high temperature can cause the finished product to lose autohension.
The non-inflammable self-adhesion insulation tape over-all properties that the present invention adopts unique making method to make is superior, and limited oxygen index has uninflammability more than 95; Volume resistance>=1 * 10
17Ohmcm, insulating property are good; Do not use pressure sensitive adhesive agent, self just has good autohension, between adhesive tape layer, port bonding is reliable; Water-intake rate＜0.01%, humidity resistance is good; Can be at～65 ℃～250 ℃ TR life-time service; Dielectric strength>=40kV/mm, anti-strong acid, highly basic, strong oxidizer are a kind of ideal insulating material, with the update that promotes traditional electrical construction equipment insulating material.
Description of drawings
Fig. 1 is the structural representation of boosting agent removal of the present invention and cutting apparatus;
Fig. 2 is the structural representation of preformed equipment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is carried out detailed explanation.
One, the making of painted polytetrafluoroethyldispersion dispersion resin
With stirring in polytetrafluoroethyldispersion dispersion 100～140 parts by weight, zero(ppm) water 140～180 parts by weight, high boiling solvent 20～35 parts by weight and pigment 8～14 parts by weight adding mixing tank, add the mixed solvent of forming by water 70～90 parts by weight and acetone 50～80 parts by weight then and carry out condensation; Through condensation; Become 0.1～0.2 micron primary particles aggregate 450 microns secondary particle; At last condensate is filtered and under 90～130 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin, the resin color homodisperse that present method makes; Electrical property is splendid, and its viscosity also promotes 50% than common polytetrafluoroethyldispersion dispersion resin.
More than the making method of painted polytetrafluoroethyldispersion dispersion resin can be: polytetrafluoroethyldispersion dispersion 100 parts by weight, zero(ppm) water 140 parts by weight, high boiling solvent 20 parts by weight and pigment 8 parts by weight are added in the mixing tank stir, add the mixed solvent of forming by water 70 parts by weight and acetone 50 parts by weight then and carry out condensation; At last condensate is filtered and under 90 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin.
More than the making method of painted polytetrafluoroethyldispersion dispersion resin can be: polytetrafluoroethyldispersion dispersion 140 parts by weight, zero(ppm) water 80 parts by weight, high boiling solvent 35 parts by weight and pigment 14 parts by weight are added in the mixing tank stir, add the mixed solvent of forming by water 90 parts by weight and acetone 80 parts by weight then and carry out condensation; At last condensate is filtered and under 130 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin.
Preferably, with 125 parts by weight, zero(ppm) water 167 parts by weight, high boiling solvent 25 parts by weight, pigment 10 parts by weight add stirring in the mixing tank, add the mixed solvent of being made up of water 83 parts by weight and acetone 66 parts by weight then and carry out condensation; Through condensation, last again condensate filtered and under 110 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin.
The concentration of polytetrafluoroethyldispersion dispersion is 60%, pH value is 7～10, the polytetrafluoroethyldispersion dispersion that can adopt the model DF302 of Shandong Dongyue Polymer Material Co., Ltd. to produce.The high boiling solvent DBE that high boiling solvent can adopt sharp Chinese workers ltd of Weifang City, Shandong unit to produce, the index of high boiling solvent DBE is: ester content:>=99, outward appearance: colourless transparent liquid, water-content: density g/ml (20 ℃)≤0.1%: 1.08～1.096, acid number mgKOH/g :≤0.15, viscosity cps (25 ℃): 2.4, boiling range: 195～230 ℃.
The index request of pigment: (1), higher thermotolerance is arranged, 400 ℃ of following colour solid stable performances, lovely luster, colour-fast; (2), require purity high, particle is fine and smooth and evenly, good dispersivity mixes easily; (3), tinting strength wants high, just can obtain tangible coloring effect with micro-.
Two, paste shape moulding
Because the tetrafluoroethylene molecular structure is the straight chain type thermoplastic high molecular compound; Even be heated to the above temperature of fusing point; Can only form the gel state of no crystalloid, so can not adopt the method for melt processing of common plastics, the present invention adopts unique paste shape moulding process to make:
1, colored polytetrafluoroethyldispersion dispersion resin is refrigerated 20～24h at 8～15 ℃, at dust-free workshop raw material is sieved with 8～10 purpose sieves then, to stop the influence of dust to electrical property;
2, colored polytetrafluoroethyldispersion dispersion resin and the boosting agent after will sieving is mixed into the paste shape, leaves standstill 10～15h, preferably 12h; The weight part proportioning of colored polytetrafluoroethyldispersion dispersion resin and boosting agent is: colored polytetrafluoroethyldispersion dispersion resin 60～90, boosting agent 20～30; The weight part proportioning of preferred colored polytetrafluoroethyldispersion dispersion resin and boosting agent is: colored polytetrafluoroethyldispersion dispersion resin 70, boosting agent 25.The requirement of described boosting agent: (1), good lubricity is arranged is penetrated in the resin easily and goes; Chemical transformation does not take place during (2), with mixed with resin; (3), the boosting agent is taking off when getting, and can all overflow, and do not leave any products appearance quality and resistates that reduces product properties of influencing; (4), under the operating environment temperature, be not easy from prefabrication, to volatilize.Preferentially select for use and take off aromatic hydrocarbon solvent oil for satisfying above-mentioned requirements: EXXSOL D60.The index request of solvent oil: initial boiling point: 185 ℃, full boiling point: 199 ℃, 15 ℃ of density (kg/dm3): 0.764; 25 ℃ of viscosity (mm2/s): 1.6, relative evaporation rate (butylacetate=100): 4, Kauri-butanol value: 26; Aniline point: 82, aromatic content (%):＜0.5, color (Saybolt colour) :+30; Bromine number (mg Br/100g):＜10,25 ℃ of surface tension (mN/m): 24,20 ℃ of specific refractory poweres: 1.426.
3, leave standstill after, compound is stirred, rotating speed is 15～20r/min, the time is 10～20min; Make boosting agent and starting material uniform mixing.
4, the raw material that stirs leaves standstill 10～12h, and the boosting agent is permeated to starting material, carries out maturation process at 50 ℃～70 ℃ then, and the time is 20～24h; Maturation process can be in baking oven, to carry out slaking, and the purpose of slaking is to make the boosting agent to further fully infiltration of starting material through heating.
5, be 2.5～3.8Mpa at pressure; Compression speed is 45～75mm/min, and the dwell time is to make blank under 1～8min; Preformed equipment can be hydraulic power unit, about the diameter little 1mm of the diameter in its blank chamber than pushing material chamber.As shown in Figure 2, raw material 21 by Upper gasket 23 and lower gasket 24 encapsulation, is pressed with dozen embryo piston 25 and suppresses in material cavity mould 22 on Upper gasket 23.
6, blank is pushed, through cutting into fibre strip; A pushing mouthful mould material cavity temperature is controlled at 50 ℃～70 ℃, and the cone angle of the pushing mould that pushes is 30～45 degree, and compression ratio is 80～130; Wherein, compression ratio is the sectional area (S) in material chamber and the ratio of the sectional area (S ') of mouthful mould.
7, fibre strip is carried out two roll-ins and prolong, roller temperature is controlled at 50 ℃～70 ℃ during calendering, and calender speed is controlled at 0.5～5m/min, and the power that in the roller operation process, produces make fiber be oriented flat sheet prefabrication along working direction, and rolling is neat;
8, the boosting agent in the flat sheet prefabrication of processing through calendering is removed, temperature is controlled at 100～200 ℃, and too high temperature can cause the finished product to lose autohension.
Described boosting agent is removed and can be realized through boosting agent removal and cutting apparatus; As shown in Figure 1; Boosting agent removal and cutting apparatus; Include drying zone B, apparatus for shaping C and cutting device D; Flat sheet prefabrication A gets into the agent of drying zone B district removal boosting through drive roll 1, is provided with some guide reels in the drying zone B, and guide reel can be made up of first guide reel 2, second guide reel 3, the 3rd guide reel 4, the 4th guide reel 5 and the 5th guide reel, the 6th guide reel 7, the 7th guide reel 8, the 8th guide reel the 9, the 94 guide reel 10 and the tenth guide reel 11; Get into then among the apparatus for shaping C; Apparatus for shaping C can be made up of two deflector rolls, and its running speed is consistent, because there is certain hole in the base band of removing after the boosting agent; Purpose through apparatus for shaping C is to make fiber reorientation arrangement in the vertical, fills and leads up hole and improves insulating property; Last the 11 guide reel 12 gets into cutting device D and cuts, and makes product by wrap-up E rolling at last.
The non-inflammable self-adhesion insulation tape over-all properties that the present invention adopts unique making method to make is superior, and limited oxygen index has uninflammability more than 95; Volume resistance>=1 * 10
17Ohmcm, insulating property are good; Do not use pressure sensitive adhesive agent, self just has good autohension, between adhesive tape layer, port bonding is reliable; Water-intake rate＜0.01%, humidity resistance is good; Can be at～65 ℃～250 ℃ TR life-time service; Dielectric strength>=40kV/mm, anti-strong acid, highly basic, strong oxidizer are a kind of insulating material of absolute ideal, have promoted the update of traditional electrical construction equipment insulating material.
Claims (6)
1. the making method of a non-inflammable self-adhesion insulation tape is characterized in that, it making step that comprises is following:
One, the making of painted polytetrafluoroethyldispersion dispersion resin
With stirring in polytetrafluoroethyldispersion dispersion 100～140 parts by weight, zero(ppm) water 140～180 parts by weight, high boiling solvent DBE20～35 parts by weight and pigment 8～14 parts by weight adding mixing tank, add the mixed solvent of forming by water 70～90 parts by weight and acetone 50～80 parts by weight then and carry out condensation; At last condensate is filtered, and under 90～130 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin;
Two, paste shape moulding
1, the colored polytetrafluoroethyldispersion dispersion resin that obtains more than the general refrigerates 20～24h at 8～15 ℃, at dust-free workshop raw material is sieved with 8～10 purpose sieves then;
2, colored polytetrafluoroethyldispersion dispersion resin and the boosting agent after will sieving is mixed into the paste shape, leaves standstill 10～15h; The parts by weight proportioning of colored polytetrafluoroethyldispersion dispersion resin and boosting agent is: colored polytetrafluoroethyldispersion dispersion resin 60～90, boosting agent 20～30;
3, leave standstill after, compound is stirred, rotating speed is 15～20r/min, the time is 10～20min;
4, the raw material that stirs leaves standstill 10～12h, carries out maturation process at 50 ℃～70 ℃ then, and the time is 20～24h;
5, be 2.5～3.8MPa at pressure, compression speed is 45～75mm/min, and the dwell time is premolding under 1～8min, makes blank;
6, blank is pushed, through cutting into fibre strip;
7, fibre strip is carried out two roll-ins and prolong, roller temperature is controlled at 50 ℃～70 ℃ during calendering, and calender speed is controlled at 0.5～5m/min, and the power that in the roller operation process, produces makes fiber be oriented flat sheet prefabrication along working direction, and rolling is neat;
8, the boosting agent in the flat sheet prefabrication of processing through calendering is removed, temperature is controlled at 100～200 ℃;
Described boosting agent is for taking off aromatic hydrocarbon solvent oil EXXSOL D60.
2. the making method of a kind of non-inflammable self-adhesion insulation tape as claimed in claim 1; It is characterized in that: in described (one) step; With 125 parts by weight, zero(ppm) water 167 parts by weight, high boiling solvent 25 parts by weight; Pigment 10 parts by weight add stirring in the mixing tank, add the mixed solvent of being made up of water 83 parts by weight and acetone 66 parts by weight then and carry out condensation; Through condensation, last again condensate filtered and under 110 ℃ temperature, carry out drying, promptly make colored polytetrafluoroethyldispersion dispersion resin.
3. the making method of a kind of non-inflammable self-adhesion insulation tape as claimed in claim 1 is characterized in that: the concentration of described polytetrafluoroethyldispersion dispersion is 60%, pH value is 7～10.
4. the making method of a kind of non-inflammable self-adhesion insulation tape as claimed in claim 1, it is characterized in that: described maturation process is in baking oven, to carry out slaking.
5. the making method of a kind of non-inflammable self-adhesion insulation tape as claimed in claim 1; It is characterized in that: described preformed equipment is hydraulic power unit; Raw material is in the material cavity mould; By Upper gasket and lower gasket encapsulation, on Upper gasket, be pressed with dozen embryo piston and suppress, the diameter in its material cavity mould is than the little 1mm of diameter in pushing material chamber.
6. the making method of a kind of non-inflammable self-adhesion insulation tape as claimed in claim 1; It is characterized in that: described boosting agent is removed through boosting agent removal and cutting apparatus and is realized; Described boosting agent removal and cutting apparatus include drying zone, apparatus for shaping and cutting device, and flat sheet prefabrication gets into drying zone through drive roll and removes the boosting agent, gets in the apparatus for shaping then; Get into cutting device at last and cut, make product by the wrap-up rolling at last.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI614131B (en) * | 2012-10-31 | 2018-02-11 | 日本華爾卡工業股份有限公司 | Piezoelectric laminate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2962128B1 (en) | 2010-07-02 | 2013-06-14 | Prod Plastiques Performants Holding 3P Holding | PTFE MATERIAL WITH ANTI-CORONA EFFECT |
| CN101921553B (en) * | 2010-07-02 | 2013-09-04 | 肇庆市大旺台旺门窗厂 | Teflon insulating self-adhesive tape and application method thereof |
| CN115747995B (en) * | 2022-11-30 | 2023-08-22 | 江苏金由新材料有限公司 | Preparation method of colored polytetrafluoroethylene fiber, fiber and fiber product |
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| CN1119021A (en) * | 1993-03-10 | 1996-03-20 | 科茨兄弟公开有限公司 | Dispersion |
| CN101597379A (en) * | 2009-04-24 | 2009-12-09 | 曾燕飞 | The making method of the colored raw material band of winding and sintering tetrafluoroethylene |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119021A (en) * | 1993-03-10 | 1996-03-20 | 科茨兄弟公开有限公司 | Dispersion |
| CN101597379A (en) * | 2009-04-24 | 2009-12-09 | 曾燕飞 | The making method of the colored raw material band of winding and sintering tetrafluoroethylene |
Non-Patent Citations (1)
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| 汪萍.聚四氟乙烯彩色微型管的加工应用技术.《现代塑料加工应用》.2001,第13卷(第06期), * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI614131B (en) * | 2012-10-31 | 2018-02-11 | 日本華爾卡工業股份有限公司 | Piezoelectric laminate |
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