A kind of warming plate special glass fiber mat and preparation method thereof
Technical field
The invention belongs to Nonwovens In Technology field, be specifically related to a kind of warming plate special glass fiber mat and preparation method thereof.
Background technology
In recent years, a lot of pernicious fire of high-rise building accidents such as CCTV Xin Lou, teacher apartment, Jing'an District, Shanghai fire, cause showing great attention to of various circles of society's External Wall heat preservation technology.For this reason, the Ministry of Public Security puts into effect associated documents, requires that architecture exterior wall insulating materials adopts combustibility to be the material of A level without exception.Construction market generally uses the organic insulation material such as polystyrene foam (EPS, XPS), spray polyurethane foam (PU), by increasing the anti-flammability of insulation material in the mode of organic material surface smear inorganic material.But the inorganic material of smearing very easily comes off, make organic material easily aging, cannot the life-span same with building.Repeatedly change not only wasting manpower and material resources, and cause white pollution.The more important thing is that fire protecting performance is difficult to ensure.
External Thermal Insulation Technology for External the most ripe at present surely belongs to GKP system, and this system adopts styrofoam to do heat-insulation layer, is pasted onto exterior wall outer surface by polymer cement mortar adhesive, then by polymer mortar sticking glass fibrous mesh cloth.Fiberglass gridding cloth is on the one hand as protective layer, and another aspect is as the basic unit of decoration of exterior wall surface layer.Fiberglass gridding cloth can improve cracking resistance and the impact resistance of warming plate, and can cushion the slight displacement of the styrofoam caused due to reasons such as body of wall displacement, crackings.
Because the cohesive force of fiberglass gridding cloth and styrofoam is poor, cause it easily to come off, not only contaminated environment, and cannot safety be ensured, also do not have heat-insulating property.In order to strengthen both bonding forces, people adopt the production technology of organic material foam-in-place usually, but foam-in-place technique can discharge ODP, has destruction to ozone layer, and the harmful organic gas that volatilizees.
Application number is describe a kind of thermal insulating polymer composite glass fiber flame-retardant facing material for wall body in the Chinese invention patent application file of 201110457079.7.This material adopts enhancement mode glass fibre mat to do substrate, applies a kind of flame retardance of polymer cement mortar coating make through the coating processes of advanced person.Can invest on mould in warming plate production process, to prevent the seepage of organic material in foaming process.
Although current existing glass fibre mat can with cement mortar compound after to be applied to the production of warming plate as surface lining, because the distribution of pores of existing mat is unreasonable, too thin easy bleed, too thick, add the thickness of warming plate; And it is lower with the adhesion of insulation material.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, a kind of warming plate special glass fiber mat and preparation method thereof is provided, require that the distribution of pores of glass fibre mat is reasonable, to the cement mortar of coating, there is semi-permeable function, thus ensure that the mat after coating and insulation material bond firmly.
The technical solution adopted for the present invention to solve the technical problems is: a kind of warming plate special glass fiber mat, comprises glass chopped silk, and described glass chopped silk comprises the specification of more than two classes;
Wherein the specification of a class is diameter 10 ~ 15 microns, one or more in length 15 ~ 20 millimeters; The specification of an other class is diameter 8 ~ 12 microns, one or more in length 10 ~ 14 millimeters; The weight accounting of the described glass chopped silk of two classes is 1.0 ~ 4.0:1.
Preferably, described glass chopped silk is by the diameter 13 microns of 60wt%, and the diameter of the glass fibre that length is 18 millimeters and 40wt% 10 microns, the glass fibre that length is 12 millimeters forms.
Preferably, the combustible content of described warming plate special glass fiber mat is 15 ~ 25wt%, and grammes per square metre is 40 ~ 60g/m2, and thickness is 0.4 ~ 0.6 millimeter.
Preferably, also comprise binding agent, it is characterized in that: described binding agent comprises Lauxite, polyvinyl acetate and coupling agent, the weight ratio of three is followed successively by 75 ~ 85:10 ~ 20:1 ~ 5.
A kind of preparation method of warming plate special glass fiber mat, comprise slurry preparation operation, it is characterized in that: described slurry preparation operation comprise the glass chopped silk of the above different size of two classes is proportionally weighed after be scattered in plain boiled water the step forming slurry, in described slurry, glass chopped silk accounts for 0.1 ~ 0.15%.
Preferably, described white water viscosity is 7.0 ~ 9.0CP.
Preferably, also comprise fiberizing operation, it is characterized in that, the dehydration in described fiberizing is divided into 5 drying zones, is respectively: 300 ~ 500m from the first drying zone to the 5th drying zone dehydrating amount hourly
3, 700 ~ 900m
3, 900 ~ 1100m
3, 700 ~ 800m
3with 200 ~ 400m
3.
Preferably, also comprise wet felt dipping process, it is characterized in that: flood that binding agent used is Lauxite, binding agent emulsion that polyvinyl acetate emulsion and coupling agent KH560 mix, the mass percent of three is 40:9:1, and the concentration of described binding agent emulsion is 20 ~ 40wt%.
Compared with prior art, the invention has the beneficial effects as follows:
(1) owing to adopting the glass fibre of the above different-diameter of two classes and length, make mat more closely knit, porosity is low, makes the cement mortar of coating be in semi-permeable state, thus can reduce the consumption of cement mortar, alleviate the quality of insulation material;
(2) the semi-permeable state of cement mortar makes the combination of surface lining and insulation material tightr;
(3) thinner cement mortar coating makes surface lining ventilative and does not thoroughly expect, in organic material foaming process, the gas between felt and organic material can through coating, but organic material through going, can not can not be formed " cavity ";
(4) binder formula improved not only increases the bond strength of glass fibre mat and insulation material, and enhances the conjugation with cement mortar.
Accompanying drawing explanation
Accompanying drawing is preparation technology's flow chart of warming plate special glass fiber mat.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
The technical performance index of the glass fibre mat of this embodiment is as follows:
The preparation method of this kind of warming plate special glass fiber mat is as follows:
1, slurry preparation: add a certain amount of pure water in agitator tank and slurry tank, and it is constant to maintain the water yield in production process afterwards, in order to glass chopped silk is dispersed into monofilament state, in pure water, add thickener, dispersant, defoamer, make plain boiled water.
Described thickener is hydroxyethylcellulose, and for commodity are easily purchased in market, its outward appearance is white powder, 2% solution viscosity 4000 ~ 6000mPas, and moisture is less than 5%, and ash content is less than 10%, and light transmittance is greater than 95%; The addition of thickener is as the criterion to make the viscosity of plain boiled water reach 8.5CP.
Described dispersant is cation fatty acid condensation polymer, it is a kind of special dispersant with fiber affinity effect that can be applied to various staple fibre, also be that commodity are easily purchased in market, its outward appearance is white emulsion, pH value 4, viscosity (20 DEG C) 200mPas, can dilute with water under normal temperature in any proportion completely.In plain boiled water, the concentration of dispersant is about 100ppm; Void fraction in plain boiled water controls 6 ~ 10%.
Described defoamer is KLD-943, and it is that commodity are easily purchased in market; Its outward appearance is oyster white thick liquid, and pH value is neutral, and active matter content 100% is soluble in water.
After plain boiled water has been prepared, weigh diameter 13 microns respectively, the glass fibre that length is 18 millimeters and diameter 10 microns, two kinds of glass fibres of length 12 millimeters add in plain boiled water and stir, and obtained slurry, in slurry, the concentration of glass chopped silk is about 0.12%.Wherein, the ratio of long fiber and staple fibre is 3:2.
In order to ensure the uniformity that monofilament disperses, above-mentioned slurry, under the effect of liquid level difference, successively through 1# slurry tank and 2# slurry tank, is squeezed into flow box pump by mashing pump and is mixed with plain boiled water, sends into homogenizer after diluting 10 times.
2, fiberizing: be evenly distributed with 28 grout outlets around homogenizer, slurry evenly sends into flow box through grout outlet, stepped diffuser and orifice plate is had to carry out transverse direction evenly cloth slurry to slurry in flow box, five drying zones are had in flow box, the corresponding dehydrated tube in each drying zone, by controlling the valve in dehydrated tube, makes the dehydrating amount of each drying zone be rational curve distribution.In this embodiment, five drying zone dehydrating amounts hourly are respectively: 400m
3, 800m
3, 1000m
3, 750m
3and 300m
3.
Slurry is removed most of plain boiled water on the guipure tilted, and glass chopped silk is evenly distributed on guipure and forms wet felt, now in wet felt moisture about 80%.The shaping guipure that glass chopped silk and the plain boiled water that can not be removed are operated continuously is taken away, and Zai Jing tri-road is forced to take out unnecessary plain boiled water, now wet felt moisture about 40%.Both sides have air tube can control the width of wet felt, and the wet hair limit of excision enters white water chest recycling.Longitudinally can reinforcement to improve longitudinal stretching ultimate strength.
3, wet felt dipping: the felt that wet by the glass fibre after dehydration is sent on dipping guipure, binding agent delivers to the overflow adhesive applicator above dipping guipure through membrane pump, be immersed on wet felt from the binding agent supersaturation adhesive applicator overflow, unnecessary binding agent is pumped by twice suction box, comes back in periodic duty tank after knockout drum is separated.
Described binding agent is the mixed liquor of Lauxite, polyvinyl acetate emulsion and coupling agent KH560, and the percentage by weight of three is followed successively by 80%, 18% and 2%.The concentration of the binding agent emulsion prepared is 30%.
4, dry: adopt hot blast penetration convection drying mode, drying oven is by a preheating zone, five baking and curing district compositions, each curing area is by a circulating fan and neat gas burner, and the temperature in each district can independently control, the moisture in each district is concentrated by a Fans and is discharged, bake out temperature, by computer controlled automatic, the fan housing up and down of drying oven evenly offers a lot of aperture, ensures that hot blast blows on felt face equably.
5, batch:
After going out curing oven, felt has reached maximum brute force, and arrive winding off spindle through " S " roller, rip cutting rotor, " S " roller can make to batch the larger tension force of acquisition, but tension force is unlikely and passes in curing oven.Otherwise wetting, felt brute force is very low cannot produce.Batch and adopt double air-expanding shaft, overcoat paper tube, is wound around two-sided tape outside paper tube.Reach certain length, automatic change of lap, revolving knife falls cut-out felt automatically.Longitudinal knife rotor can install rip cutting blade, cut into different width according to customer requirement.Finally extract air-expanding shaft out to pack product.
Embodiment 2
The technical performance index of the glass fibre mat of this embodiment is as follows:
In the preparation method of this kind of warming plate special glass fiber mat, be from the different of embodiment 1:
Select the glass chopped silk of three kinds of specifications, length is respectively: 20mm, 15mm and 10mm, and diameter is respectively 13 microns, 15 microns and 8 microns, and the percentage by weight of three is respectively: 2:2:1.
The weight ratio of Lauxite, polyvinyl acetate and coupling agent in the binding agent adopted is followed successively by 75:20:5.
Glass chopped silk in slurry arrangement step accounts for 0.1%, and the white water viscosity configured is 9.0CP.
In fiberizing, be respectively from the first drying zone to the 5th drying zone dehydrating amount hourly: 300m
3, 700m
3, 900m
3, 700m
3and 200m
3.
The concentration of the binding agent emulsion configured in wet felt dipping process is 40%.
Embodiment 3
The technical performance index of the glass fibre mat of this embodiment is as follows:
In the preparation method of this kind of warming plate special glass fiber mat, be from the different of embodiment 1:
Select the glass chopped silk of two kinds of specifications, length is respectively: 18mm and 14mm, and diameter is respectively 15 microns and 12 microns, and both percentage by weights are: 2.5:1.
The weight ratio of Lauxite, polyvinyl acetate and coupling agent in the binding agent adopted is followed successively by 85:10:5.
Glass chopped silk in slurry preparation operation accounts for 0.15%, and the white water viscosity prepared is 7.0CP.
In fiberizing, be respectively from the first drying zone to the 5th drying zone dehydrating amount hourly: 500m
3, 900m
3, 1100m
3, 800m
3and 400m
3.
The concentration of the binding agent emulsion configured in wet felt dipping process is 20%.
Embodiment 4
The technical performance index of the glass fibre mat of this embodiment is as follows:
In the preparation method of this kind of warming plate special glass fiber mat, be from the different of embodiment 1:
Select the glass chopped silk of four kinds of specifications, length is respectively: 18mm, 16mm, 14mm and 12mm, and diameter is respectively 15 microns, 12 microns, 10 microns and 8 microns, and the percentage by weight of four is followed successively by: 2:2:2:1.
The weight ratio of Lauxite, polyvinyl acetate and coupling agent in the binding agent adopted is followed successively by 84:15:1.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed to the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, the equivalent variations done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.