CN103408245A - Production method of enhanced flame-retardant mica paper - Google Patents

Abstract

The invention discloses a production method of enhanced flame-retardant mica paper, which is characterized in that the mica paper is produced from the following raw materials in parts by weight: 130-140 parts of mica, 2-3 parts of antimonous oxide, 2-3 parts of chitosan, 1-2 parts of aluminium hydroxide, 2-3 parts of vermiculite powder, 5-8 parts of montmorillonite powder, 1-2 parts of citric acid, 8-10 parts of silane coupling agent KH550, 2-3 parts of ethylene glycol, 2-3 parts of ricinoleic acid, 2-3 parts of polyvinyl alcohol, 1-2 parts of ammonium persulphate and a proper amount of water. According to the method disclosed by the invention, by adding the antimonous oxide, the flame retardance and insulating property of the mica paper are enhanced while maintaining the advantages of breakdown resistance, heat insulation and the like of natural mica; and the produced mica paper has good electric strength and tensile strength.

Description

Strengthen the manufacture method of fire-retardant mica paper

Technical field

The present invention relates to the mica paper production technical field, particularly a kind of manufacture method that strengthens fire-retardant mica paper.

Background technology

Mica is a kind of laminar silicic acid salt mineral of Nature creating, the characteristic that has good physicals and electrical resistance and still keep above performance under the condition of high temperature, it has unreactiveness and noninflammability completely, the most important thing is that it has anti-high-voltage, corona-resistant and radiation-resistant characteristic.

Mica paper is to take fractus master slice (white mica, phlogopite, artificial mica synthesis) to be raw material, with chemical pulping or hydraulicefficiency machinery slurrying, copy into paper roll under the slower speed of a motor vehicle of mould machine, cut into again rolled paper or sheet paper, mica paper has kept the premium properties of natural mica, and even thickness, the dielectric strength fluctuation range is little, corona inception voltage is high and stable; The voltage characteristic of its dielectric loss is much more stable than the mica splitting insulation, and thermal conductivity is good.

But it is single to produce at present mica paper technique, adopt fecula or ripe powder production, electrical strength and the tensile strength of mica paper are undesirable, need the new production technique of research.

Summary of the invention

The purpose of this invention is to provide a kind of manufacture method that strengthens fire-retardant mica paper.

Technical scheme of the present invention is as follows:

A kind of manufacture method that strengthens fire-retardant mica paper is characterized in that: the raw material by following weight part is made: mica 130-140, antimonous oxide 2-3, chitosan 2-3, aluminium hydroxide 1-2, vermiculite power 2-3, montmorillonite powder 5-8, citric acid 1-2, Silane coupling agent KH550 8-10, ethylene glycol 2-3, ricinolic acid 2-3, polyvinyl alcohol 2-3, ammonium persulphate 1-2, water are appropriate;

Comprise the following steps:

(1) by mica 700-800 ℃ of lower high-temperature calcination, calcine 1-2 hour the mica grog;

(2) grog is added to the Silane coupling agent KH550 that is equivalent to grog weight 3-4%, the tripoly phosphate sodium STPP of 2-3%, grinding powder, obtain 50-120 order powder;

(3) by grog powder and other surplus stock mixing and water adding, to water content be 40-50%, be heated to 80-90 ℃, stirring reaction 1-2 hour;

(4) step (3) slurry is diluted to clinker content 3-4%, adds the guar gum that is equivalent to grog powder weight 4-5%, dispersed with stirring is even, the cylinder copy paper;

(5) dry: gained paper is dried to water content 0.2 ~ 0.5% and is got product in drying cylinder

The present invention has increased the antimonous oxide composition, has strengthened flame retardant properties and the insulating property of mica paper, the advantage such as has kept natural mica to resist wearing, heat insulation, and mica paper electrical strength and tensile strength that the present invention makes are good.

Embodiment

A kind of manufacture method that strengthens fire-retardant mica paper, by the raw material of following weight part (kilogram), made: mica 130, antimonous oxide 2, chitosan 3, aluminium hydroxide 1, vermiculite power 3, montmorillonite powder 5, citric acid 2, Silane coupling agent KH550 8, ethylene glycol 2, ricinolic acid 3, polyvinyl alcohol 3, ammonium persulphate 2, water are appropriate;

Comprise the following steps:

(1) by mica 700-800 ℃ of lower high-temperature calcination, calcine 1-2 hour the mica grog;

(2) grog is added to the Silane coupling agent KH550 that is equivalent to grog weight 3%, 3% tripoly phosphate sodium STPP, grinding powder, obtain 50-120 order powder;

(3) by grog powder and other surplus stock mixing and water adding, to water content be 40-50%, be heated to 80-90 ℃, stirring reaction 1-2 hour;

(4) step (3) slurry is diluted to clinker content 3-4%, adds the guar gum that is equivalent to grog powder weight 5%, dispersed with stirring is even, the cylinder copy paper;

(5) dry: gained paper is dried to water content 0.2 ~ 0.5% and is got product in drying cylinder

After testing, the mica paper that the present invention makes, tensile strength is 1.4KN/m, voltage breakdown 43KV/mm.

Claims (1)

1. manufacture method that strengthens fire-retardant mica paper, it is characterized in that: the raw material by following weight part is made: mica 130-140, antimonous oxide 2-3, chitosan 2-3, aluminium hydroxide 1-2, vermiculite power 2-3, montmorillonite powder 5-8, citric acid 1-2, Silane coupling agent KH550 8-10, ethylene glycol 2-3, ricinolic acid 2-3, polyvinyl alcohol 2-3, ammonium persulphate 1-2, water are appropriate;

Comprise the following steps:

(1) by mica 700-800 ℃ of lower high-temperature calcination, calcine 1-2 hour the mica grog;

(2) grog is added to the Silane coupling agent KH550 that is equivalent to grog weight 3-4%, the tripoly phosphate sodium STPP of 2-3%, grinding powder, obtain 50-120 order powder;

(3) by grog powder and other surplus stock mixing and water adding, to water content be 40-50%, be heated to 80-90 ℃, stirring reaction 1-2 hour;

(4) step (3) slurry is diluted to clinker content 3-4%, adds the guar gum that is equivalent to grog powder weight 4-5%, dispersed with stirring is even, the cylinder copy paper;

(5) dry: gained paper is dried to water content 0.2 ~ 0.5% and is got product in drying cylinder.