CN104313939A - High-turning-speed multi-layer coating paint - Google Patents
High-turning-speed multi-layer coating paint Download PDFInfo
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- CN104313939A CN104313939A CN201410418953.XA CN201410418953A CN104313939A CN 104313939 A CN104313939 A CN 104313939A CN 201410418953 A CN201410418953 A CN 201410418953A CN 104313939 A CN104313939 A CN 104313939A
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Abstract
The invention discloses a high-turning-speed multi-layer coating paint. The paint formula mainly comprises precoating paint, middle-coating paint and surface-coating paint. The paint formula comprises the compositions in parts by weight: 70-100 parts of heavy calcium carbonate, 0-30 parts of kaolin, 5-12 parts of latex, 5-8 parts of coating starch, and 0.1-0.5 part of a thickening agent. Paper is subjected to machine coating by employing a coating manner of two layers of precoating, one layer of middle coating and one layer of surface coating or a coating manner of one layer of precoating, one layer of middle coating and one layer of surface coating. Bottom coating employs metered glue-applying coating, and the coating amount is relatively low; and the middle/surface coating employs scraper coating, and the coating amount is relatively high. The formula helps to effectively reduce resistance of paint during coating, and improve the smoothness and the glossiness of coated paper. The paint is applicable to machine coating, is capable of effectively improving coating amount, improving surface properties of finished paper, enabling the cost per ton of paper to be substantial reduced and improve the competitiveness of the product.
Description
Technical field
The invention belongs to art paper production technical field, be specifically related to the coating that the high speed of a motor vehicle is multi-layer coated.
Background technology
Paper pulp cost accounts for about 60 to 70% of paper-making industry overall manufacturing cost.With pulp price amount of increase, great negative effect can be brought to the profit space of enterprise.For art paper, inorganic salts composition in coating, if the price such as calcium carbonate, kaolin is well below paper pulp, if can use more coating to improve into paper coating weight in process of production, effectively can reduce production cost, and the printability improving product improves enterprise competitiveness.
Under above-mentioned background, in order to ensure coating machine maneuverability and obtain better coated paper quality, coating formula optimization must be carried out for different coating methods, make coating machine can not accelerate the wearing and tearing of scraper in the process of applying, reduce problems such as producing doctor back stream, crawling, kerf, scratch.Can improve through optimizing coating formula the problem causing paper porosity deficiency with coating weight raising, and then improve ink absorption.Improve coating weight and can effectively improve paper smoothness, glossiness, to reduce energy loss needed for follow-up press polish and thickness loss.
Therefore, the key problem in technology of the coating that the high speed of a motor vehicle is multi-layer coated guarantees that each coating applies in process at each layer and has comparatively normal rheological property, water conservation degree, guarantee normally to run at high vehicle speeds, and improve the not enough problem of the too high way layer porosity of coating weight by the pigment of different-grain diameter size, improve paper smoothness and glossiness.Each coating different adhesive ratio of arranging in pairs or groups, improve coating adhesion between layers, improve surface strength of paper.
Summary of the invention
The object of this invention is to provide the coating that the high speed of a motor vehicle is multi-layer coated, this formulation for coating material carries out multi-layer coated technique under meeting the high speed of a motor vehicle, and primary coat adopts metering size press coating, and coating weight is relatively low; In/face painting employing scraper for coating, coating weight is relatively high.This formulation for coating material carrys out the Gel-coating film spraying condition required for satisfied different coating machine, as low-shearing force viscosity, ultra-high shear power viscosity and water conservation degree etc. through application variety classes pigment and adhesive ratio.
The object of the invention is to be achieved through the following technical solutions:
The coating that a kind of high speed of a motor vehicle is multi-layer coated, is characterized in that: this formulation for coating material mainly comprise precoating coating,
Middle painting coating and painting coating; Described precoating formulation for coating material comprises powdered whiting, coating starch and latex; Solid content is 58 ~ 66%; Viscosity 300cps ~ 800cps; PH8.5 ~ 9.5; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 5 ~ 10 parts, 5 ~ 8 parts, latex; Described middle painting formulation for coating material comprises powdered whiting, coating starch, latex and thickener; Solid content is 66 ~ 70%; Viscosity 700cps ~ 1500cps; PH 8.5 ~ 9.5; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 4 ~ 6 parts, 7 ~ 9 parts, latex, thickener 0.1 ~ 0.5 part; Described painting coating formula comprises calcium carbonate, kaolin, latex and thickener; Solid content is 68 ~ 72%; Viscosity 1400cps ~ 2600cps; PH 8.5 ~ 9.5; Wherein each component parts by weight: powdered whiting 0 ~ 70 part, kaolin 0 ~ 30 part, 8 ~ 12 parts, latex, thickener 0.1 ~ 0.5 part;
Precoating coating, middle painting coating and the powdered whiting described in painting coating, in precoating coating, at least 50% particle is less than 2 μm, and at least 30% particle is less than 1 μm; In middle painting coating, at least 65% particle is less than 2 μm, and at least 40% particle is less than 1 μm; In painting coating, at least 98% particle is less than 2 μm, and at least 80% particle is less than 1 μm, and kaolin at least 99% particle described in painting coating is less than 2 μm, and at least 90% particle is less than 1 μm.
Described in precoating coating, middle painting coating and painting coating, latex is styrene-butadiene kind, various coating particle diameter and Tg point as follows, precoating coating use latex be 110nm ~ 1
60nm, Tg point-6 ~ 9 DEG C; The latex that middle painting coating uses is 100nm ~ 150nm, Tg point-6 ~ 9 DEG C; The latex that painting coating uses is 90nm ~ 130nm, Tg point 10 ~ 20 DEG C.
Described coating starch is use corn or tapioca carry out acidifying, oxidation, esterification or carry out the low-viscosity starch after transforming viscosity reduction with enzyme, and solid content 80 ~ 100%, parts by weight are 5 ~ 8.
Described thickener is synthesis class polyacrylic, solid content 20 ~ 40%, and parts by weight are 0.01 ~ 0.5; Carboxyl methyl cellulose, solid content 80 ~ 100%, parts by weight are 0.1 ~ 0.6; Carboxymethyl starch CMS, solid content 80 ~ 100%, parts by weight are 0.1 ~ 0.6.
Precoating coating, middle painting coating and painting coating solid content and related streams change nature scope are respectively: precoating coating solids 58 ~ 66%, coating low-shear viscosity adopts Brookfield DV-II+ Viscometer test to be 300cps ~ 800cps, the best is 400cps ~ 600cps, coating ultra-high shear viscosity adopts ACAV A2 Hi-shear Viscometer test, shear rate 10
6be 25cps ~ 45cps under 1/s, the best is 30cps ~ 40cps, pH is 8.5 ~ 9.5, and the best is 8.5 ~ 9.0; Middle painting coating solids 66 ~ 70%, low-shear viscosity is 700cps ~ 1500cps, and the best is 800cps ~ 1000cps, and ultra-high shear viscosity is in shear rate 10
6be 35cps ~ 50cps under 1/s, the best is 40cps ~ 45cps, pH is 8.5 ~ 9.5, and the best is 8.5 ~ 9.0; Painting coating solid content 68 ~ 72%, low-shear viscosity is 1400cps ~ 2600cps, and the best is 1600cps ~ 1800cps, and ultra-high shear viscosity is in shear rate 10
6be 40cps ~ 55cps under 1/s, the best is 45cps ~ 50cps, pH is 8.5 ~ 9.5, and the best is 8.5 ~ 9.0.
Precoating coating, middle painting coating and painting coating formula also comprise dispersant, defoamer, resistance to hydrated agent and lubricant, and wherein dispersant refers to: main Types is polyacrylate, polyphosphate, and parts by weight are 0.05 ~ 0.2; Defoamer refers to: main Types is phosphoric acid ester, silicon compound, and parts by weight are 0.05 ~ 0.3; Resistance to hydrated agent refers to: main Types is polyamide polyureas PAPU type, and parts by weight are
0~
1.0;lubricant refers to: main Types is stearic acid class, and parts by weight are
0~
1.0.Above-mentioned three kinds of coating, with different pigment and adhesive ratio, meet the rheological characteristic required by various coating method.Add in last layer with two-layer precoating and to be coated with and face painting or precoating, middle painting and face are coated with the coating method of each one deck.Be applied on machine and be coated with, effectively can improve coating weight, at fabric width be 10.96m paper machine on carry out machine is coated with, precoating adopt metering size press coating, one side coating weight 6 ~ 14g/m
2time, in/face painting employing scraper for coating, one side coating weight is respectively middle painting 10 ~ 18g/m
2, face is coated with 8 ~ 16g/m
2time, Coating Speed normally can run at 1100 ~ 1500m/min.After the present invention applied by paper machine, ton paper cost can be reduced and improve quality of finished paper.
The invention has the beneficial effects as follows: the shortcoming overcoming prior art, achieve the paint development demand that the high speed of a motor vehicle is multi-layer coated, can carry out machine is coated with the higher speed of a motor vehicle, meet the coating rheological property needed for different coating method, effectively can reduce the high shear viscosity of coating, reduce the resistance of coating generation, improve into paper coating weight, significantly reduce ton paper cost, and improve into paper surface nature, as smoothness and glossiness, product is made to have certain competitiveness.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further details.
Embodiment 1:
The coating that a kind of high speed of a motor vehicle is multi-layer coated, is characterized in that: this formulation for coating material mainly comprises precoating coating, middle painting coating and painting coating; Described precoating formulation for coating material comprises powdered whiting, coating starch and latex; Solid content is 58%; PH8.5; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 5 parts, 5 parts, latex; Described middle painting formulation for coating material comprises powdered whiting, coating starch, latex and thickener; Solid content is 66%; PH 8.5; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 4 parts, 7 parts, latex, thickener 0.1 part; Described painting coating formula comprises powdered whiting, latex and thickener; Solid content is 68%; PH 8.5; Wherein each component parts by weight: powdered whiting 100 parts, 10 parts, latex, thickener 0.3 part; Described thickener is carboxymethyl cellulose, solid content 90%, and parts by weight are 0.1.
Precoating coating, middle painting coating and the powdered whiting described in painting coating, in precoating coating, 55% particle is less than 2 μm, and 35% particle is less than 1 μm; In middle painting coating, 65% particle is less than 2 μm, and 40% particle is less than 1 μm; In painting coating, 98% particle is less than 2 μm, and 80% particle is less than 1 μm.
The particle diameter of latex described in precoating coating, middle painting coating and painting coating, the latex that precoating coating uses is 110nm, Tg point-6 DEG C; The latex that middle painting coating uses is 100nm, Tg point-6 DEG C; The latex that painting coating uses is 90nm, Tg point 10 DEG C.
Precoating coating, middle painting coating and painting coating solid content and related streams change nature scope are respectively: precoating coating solids 58%, coating low-shear viscosity adopts Brookfield DV-II+ Viscometer test to be 300cps, coating ultra-high shear viscosity adopts ACAV A2 Hi-shear Viscometer test, shear rate 10
6be 25cps, pH under 1/s be 8.5; Middle painting coating solids 66%, low-shear viscosity is 700cps, and the best is 800cps, and ultra-high shear viscosity is in shear rate 10
6be 35cps, pH under 1/s be 8.5; Painting coating solid content 68%, low-shear viscosity is 1400cps, and ultra-high shear viscosity is in shear rate 10
6be 40cps, pH under 1/s be 8.5.
Precoating coating, middle painting coating and painting coating formula also comprise dispersant, defoamer, resistance to hydrated agent and lubricant, and wherein dispersant refers to: polyacrylate, and parts by weight are 0.05; Defoamer refers to: silicon compound, and parts by weight are 0.05; Resistance to hydrated agent refers to: polyamide polyureas PAPU type, parts by weight are
0.2;lubricant refers to: stearic acid class, and parts by weight are 0.2.
Embodiment 2:
The coating that a kind of high speed of a motor vehicle is multi-layer coated, is characterized in that: this formulation for coating material mainly comprises precoating coating, middle painting coating and painting coating; Described precoating formulation for coating material comprises powdered whiting, coating starch and latex; Solid content is 62%; PH 8.9; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 8 parts, 7 parts, latex; Described middle painting formulation for coating material comprises powdered whiting, coating starch, latex and thickener; Solid content is 68%; PH 8.9; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 5 parts, 8 parts, latex, thickener 0.3 part; Described painting coating formula comprises powdered whiting, kaolin, latex and thickener; Solid content is 70%; PH 8.8; Wherein each component parts by weight: powdered whiting 80 parts, kaolin 20 parts, 10 parts, latex, thickener 0.2 part; Described thickener is synthesis class polyacrylic, solid content 30%.
Precoating coating, middle painting coating and the powdered whiting described in painting coating, in precoating coating, 55% particle is less than 2 μm, and 33% particle is less than 1 μm; In middle painting coating, 65% particle is less than 2 μm, and 45% particle is less than 1 μm; In painting coating, 98.5% particle is less than 2 μm, and 83% particle is less than 1 μm.Kaolin 99% particle described in painting coating is less than 2 μm, and 90% particle is less than 1 μm.
The latex that precoating coating uses is 150nm, Tg point-9 DEG C; The latex that middle painting coating uses is 150nm, Tg point-9 DEG C; The latex that painting coating uses is 110nm, Tg point 15 DEG C.
Precoating coating, middle painting coating and painting coating solid content and related streams change nature scope are respectively: precoating coating solids 61%, coating low-shear viscosity adopts Brookfield DV-II+ Viscometer test to be 500cps, coating ultra-high shear viscosity adopts ACAV A2 Hi-shear Viscometer test, shear rate 10
6for 35cpspH is 8.7 under 1/s; Middle painting coating solids 68%, low-shear viscosity is 900cps, and ultra-high shear viscosity is in shear rate 10
6be 42cps, pH under 1/s be 8.7; Painting coating solid content 70%, low-shear viscosity is 1700cps, and ultra-high shear viscosity is in shear rate 10
6be 47cps, pH under 1/s be 8.7.
Precoating coating, middle painting coating and painting coating formula also comprise dispersant, defoamer, resistance to hydrated agent and lubricant, and wherein dispersant refers to: polyacrylate, and parts by weight are 0.1; Defoamer refers to: phosphoric acid ester, and parts by weight are 0.2; Resistance to hydrated agent refers to: polyamide polyureas PAPU type, parts by weight are 0.5
;lubricant refers to: stearic acid class, and parts by weight are 0.5.
Embodiment 3:
The coating that a kind of high speed of a motor vehicle is multi-layer coated, is characterized in that: this formulation for coating material mainly comprises precoating coating, middle painting coating and painting coating; Described precoating formulation for coating material comprises powdered whiting, coating starch and latex; Solid content is 66%; PH9.0; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 8 parts, 8 parts, latex; Described middle painting formulation for coating material comprises powdered whiting, coating starch, latex and thickener; Solid content is 70%; PH9.0; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 6 parts, 9 parts, latex, thickener 0.5 part; Described painting coating formula comprises powdered whiting, latex and thickener; Solid content is 72%; PH9.5; Wherein each component parts by weight: powdered whiting 90 parts, kaolin 10 parts, 12 parts, latex, thickener 0.5 part; Described thickener is synthesis class polyacrylic, solid content 40%, and parts by weight are 0.5; Carboxyl methyl cellulose, solid content 100%, parts by weight are 0.6; Carboxymethyl starch CMS, solid content 100%, parts by weight are 0.6.
Precoating coating, middle painting coating and the powdered whiting described in painting coating, in precoating coating, 60% particle is less than 2 μm, and 36% particle is less than 1 μm; In middle painting coating, 65% particle is less than 2 μm, and 50% particle is less than 1 μm; In painting coating, 98% particle is less than 2 μm, and 80% particle is less than 1 μm.Kaolin 99% particle described in painting coating is less than 2 μm, and 90% particle is less than 1 μm.
The latex that precoating coating uses is 150nm, Tg point-9 DEG C; The latex that middle painting coating uses is 150nm, Tg point-9 DEG C; The latex that painting coating uses is 110nm, Tg point 15 DEG C.
Precoating coating, middle painting coating and painting coating solid content and related streams change nature scope are respectively: precoating coating solids 66%, coating low-shear viscosity adopts Brookfield DV-II+ Viscometer test to be 800cps, coating ultra-high shear viscosity adopts ACAV A2 Hi-shear Viscometer test, shear rate 10
6be 45cps, pH under 1/s be 9.0; Middle painting coating solids 70%, low-shear viscosity is 1200cps, and ultra-high shear viscosity is in shear rate 10
6be 50cps, pH under 1/s be 9.0; Painting coating solid content 72%, low-shear viscosity is 2000cps, and ultra-high shear viscosity is in shear rate 10
6be 55cps, pH under 1/s be 9.0.
Precoating coating, middle painting coating and painting coating formula also comprise dispersant, defoamer, resistance to hydrated agent and lubricant, and wherein dispersant refers to: polyacrylate, and parts by weight are 0.1; Defoamer refers to: phosphoric acid ester, and parts by weight are 0.05; Resistance to hydrated agent refers to: polyamide polyureas PAPU type, parts by weight are 0.4
;lubricant refers to: stearic acid class, and parts by weight are 0.4.
Claims (6)
1. the coating that the high speed of a motor vehicle is multi-layer coated, is characterized in that: this formulation for coating material mainly comprises precoating coating, middle painting coating and painting coating; Described precoating formulation for coating material comprises powdered whiting, coating starch and latex; Solid content is 58 ~ 66%; Viscosity 300cps ~ 800cps; PH8.5 ~ 9.5; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 5 ~ 8 parts, 5 ~ 8 parts, latex; Described middle painting formulation for coating material comprises powdered whiting, coating starch, latex and thickener; Solid content is 66 ~ 70%; Viscosity 700cps ~ 1500cps; PH 8.5 ~ 9.5; Wherein each component parts by weight: powdered whiting 100 parts, coating starch 4 ~ 6 parts, 7 ~ 9 parts, latex, thickener 0.1 ~ 0.5 part; Described painting coating formula comprises powdered whiting, kaolin, latex and thickener; Solid content is 68 ~ 72%; Viscosity 1400cps ~ 2600cps; PH 8.5 ~ 9.5; Wherein each component parts by weight: powdered whiting 0 ~ 70 part, kaolin 0 ~ 30 part, 8 ~ 12 parts, latex, thickener 0.1 ~ 0.5 part; Described thickener comprises synthesis class polyacrylic, solid content 20 ~ 40%, and parts by weight are 0.01 ~ 0.5; Carboxyl methyl cellulose, solid content 80 ~ 100%, parts by weight are 0.1 ~ 0.6; Carboxymethyl starch CMS, solid content 80 ~ 100%, parts by weight are 0.1 ~ 0.6.
2. the coating that the high speed of a motor vehicle according to claim 1 is multi-layer coated, is characterized in that: precoating coating, middle painting coating and the powdered whiting described in painting coating, and in precoating coating, at least 50% particle is less than 2 μm, and at least 30% particle is less than 1 μm; In middle painting coating, at least 65% particle is less than 2 μm, and at least 40% particle is less than 1 μm; In painting coating, at least 98% particle is less than 2 μm, and at least 80% particle is less than 1 μm; Kaolin at least 99% particle described in painting coating is less than 2 μm, and at least 90% particle is less than 1 μm.
3. the coating that the high speed of a motor vehicle according to claim 1 is multi-layer coated, is characterized in that: the particle diameter of latex described in precoating coating, middle painting coating and painting coating, and the latex that precoating coating uses is 110nm ~ 1
60nm, Tg point-6 ~ 9 DEG C; The latex that middle painting coating uses is 100nm ~ 150nm, Tg point-6 ~ 9 DEG C; The latex that painting coating uses is 90nm ~ 130nm, Tg point 10 ~ 20 DEG C.
4. the coating that the high speed of a motor vehicle according to claim 1 is multi-layer coated, it is characterized in that: precoating coating, middle painting coating and painting coating solid content and related streams change nature scope are respectively: precoating coating solids 58 ~ 66%, coating low-shear viscosity adopts Brookfield DV-II+ Viscometer test to be 300cps ~ 800cps, coating ultra-high shear viscosity adopts ACAV A2 Hi-shear Viscometer test, shear rate 10
6be 25cps ~ 45cps, pH under 1/s be 8.5 ~ 9.5; Middle painting coating solids 66 ~ 70%, low-shear viscosity is 700cps ~ 1500cps, and ultra-high shear viscosity is in shear rate 10
6be 35cps ~ 50cps, pH under 1/s be 8.5 ~ 9.5; Painting coating solid content 68 ~ 72%, low-shear viscosity is 1400cps ~ 2600cps, and ultra-high shear viscosity is in shear rate 10
6be 40cps ~ 55cps, pH under 1/s be 8.5 ~ 9.0.
5. the coating that the high speed of a motor vehicle according to claim 1 is multi-layer coated, it is characterized in that: precoating coating low-shear viscosity adopts Brookfield DV-II+ Viscometer test to be 400cps-600cps, coating ultra-high shear viscosity adopts ACAV A2 Hi-shear Viscometer test, shear rate 10
6under 1/s, the best is 30cps ~ 40cps, pH is 8.5 ~ 9.0; Middle painting coating low-shear viscosity is for being 800cps ~ 1000cps, and ultra-high shear viscosity is in shear rate 10
6be 40cps ~ 45cps, pH under 1/s be 8.5 ~ 9.0; Painting coating low-shear viscosity is 1600cps ~ 1800cps, and ultra-high shear viscosity is in shear rate 10
6be 45cps ~ 50cps, pH under 1/s be 8.5 ~ 9.0.
6. the coating multi-layer coated according to the high speed of a motor vehicle one of Claims 1-4 Suo Shu, it is characterized in that: precoating coating, middle painting coating and painting coating formula also comprise dispersant, defoamer, resistance to hydrated agent and lubricant, wherein dispersant refers to: main Types is polyacrylate, polyphosphate, and parts by weight are 0.05 ~ 0.2; Defoamer refers to: main Types is phosphoric acid ester, silicon compound, and parts by weight are 0.05 ~ 0.3; Resistance to hydrated agent refers to: main Types is polyamide polyureas PAPU type, and parts by weight are
0~
1.0;lubricant refers to: main Types is stearic acid class, and parts by weight are
0~
1.0.
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