CN111167687A - Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same - Google Patents

Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same Download PDF

Info

Publication number
CN111167687A
CN111167687A CN201911404704.4A CN201911404704A CN111167687A CN 111167687 A CN111167687 A CN 111167687A CN 201911404704 A CN201911404704 A CN 201911404704A CN 111167687 A CN111167687 A CN 111167687A
Authority
CN
China
Prior art keywords
coating
paint
curing
gram weight
composite board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911404704.4A
Other languages
Chinese (zh)
Inventor
张磊
周英牡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Polycore Composite Material Co ltd
Original Assignee
Hangzhou Polycore Composite Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Polycore Composite Material Co ltd filed Critical Hangzhou Polycore Composite Material Co ltd
Priority to CN201911404704.4A priority Critical patent/CN111167687A/en
Publication of CN111167687A publication Critical patent/CN111167687A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/586—No clear coat specified each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
    • B05D3/141—Plasma treatment
    • B05D3/142—Pretreatment

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses a PU quick-drying coating process of a novel efficient thermoplastic composite board, which comprises the following steps: step one), carrying out plasma spray gun treatment on the surface of the plate; step two), performing roller coating on the plate obtained in the step one) with PP treatment water, and performing infrared baking for 2-3 min; step three), spraying a single-roller middle coating paint, leveling for 1-3 min through a drying tunnel, and curing in a middle coating curing chamber; step four), coating paint in the positive and negative rollers, and simultaneously performing low-energy curing by a middle coating curing lamp; step five), spraying PU paint, and then curing in a drying oven at high temperature; and step six), rolling the UV varnish by a roller, and curing by using a surface coating curing lamp to obtain the composite board. The plate is treated by the plasma spray gun, the surface energy is improved, the existing problems are overcome by the process of combining roller coating and spraying, the colored PU paint is used, polishing is not needed, direct coating can be performed, the curing temperature is low, the curing time is short, the process is simple, the coating mode is formed at one time, and the production efficiency is high.

Description

Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same
Technical Field
The invention relates to a coating construction method, in particular to a PU quick-drying coating process of a novel efficient thermoplastic composite board and a composite board prepared by the PU quick-drying coating process.
Background
Patent document with application publication number CN103990587A discloses a UV coating construction process; comprises the following steps: sanding, rolling and coating UV primer, rolling and coating UV colored paint, rolling and coating the UV primer again, sanding, wetting before curtain coating, curtain coating high-gloss UV finish paint twice, and drying to finish film coating. The process needs a sanding procedure, the uneven sanding of the base material is easily caused in the sanding procedure, paint is required to be coated twice, and the using amount of the paint is large.
Patent document with application publication number CN106216209A discloses a furniture spraying process, wherein after a substrate is sanded by an abrasive belt machine, the substrate needs to be dried for 30 minutes after being sprayed with a primer, and the substrate needs to be dried for 1.5 hours after being sprayed with a primer intermediate coat, so that the product manufacturing period is long, the field requirement is large, and the furniture spraying process is not suitable for mass continuous production.
Patent document CN107824415A discloses a coating process for automobiles, wherein the coating curing temperature is 190-210 ℃, and the curing time is 0.5-1 h. The process needs higher temperature and longer baking time in the production process, and is not suitable for mass coating.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a PU quick-drying coating process of a novel efficient thermoplastic composite board and the composite board prepared by the PU quick-drying coating process.
In order to achieve the purpose, the invention provides the following technical scheme: a PU quick-drying coating process for a novel efficient thermoplastic composite board comprises the following steps:
step one), carrying out plasma spray gun treatment on the surface of the plate; the power supply and the plasma spray gun are combined together, fluorine plasma generated by heavy current discharge enters air in a spray form to treat the surface of the plastic, high molecular polymers on the surface of the plastic are subjected to certain reactions such as oxidation, degradation, polymerization and the like, the surface is activated, and the surface energy is increased. Compared with other surface treatment methods, the most prominent characteristic of the plasma torch is the treatment time period (less than 1s), and the surface modification at a practical level can be achieved.
Step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5-20 g/m2Carrying out infrared baking for 2-3 min; the PP treatment water plays a role in adhesion to the base material and increases the adhesion of the paint film to the base material (the composite honeycomb plate). And (3) volatilizing the diluent in a baking mode after the roller coating is carried out on the PP water, and solidifying the PP water.
Step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 15-35 g/m2Leveling for 1-3 min through a drying tunnel, and curing in a floating coat curing chamber; the middle coating paint is connected with the adhesion between PP treatment water and the positive and negative middle coatings, and simultaneously has the function of increasing the covering power to the base material.
Step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 55-75 g/m2Simultaneously, carrying out low-energy curing by a middle coating curing lamp; the connection of the middle coating paint and the interlayer adhesion of the finish paint, the function of covering power on the base material is increased, and the surface covering power is strong after the forward and reverse roller coating.
Step five), spraying a PU paint, wherein the gram weight of the PU paint is 40-70 g/m2Then curing at high temperature in an oven; the PU paint is quick-drying type, is cured by high-temperature baking, can be selected in various colors, effectively avoids the difficulty of incomplete curing of UV paint deep color paint, and can play a role in increasing interlayer adhesion of the floating coat and the varnish.
Step six), roller coating of UV varnish, wherein the gram weight of the UV varnish is 35-75 g/m2And curing by using a surface coating curing lamp to obtain the composite board. The varnish is transparent, so that the performances of the paint surface are improved, including the effects of wear resistance, aging resistance and the like, and the service life of the base material is prolonged.
Preferably, in the step two), the gram weight of the PP treatment water is 10-15 g/m2. PP water in the interval can meet the adhesion effect on the base material, the gram weight is too low, the adhesion is poor, and the gram weight is too high, so that the using amount of the paint is large.
Preferably, in the third step), the gram weight of the intermediate coating paint is 20-25 g/m2. The intermediate coating can be full in the intervalThe paint has the advantages of good covering effect, interlayer adhesion, low gram weight, poor covering power, bottom penetration, high paint gram weight and large paint consumption.
Preferably, in the step four), the gram weight of the intermediate coating paint is 50-65 g/m2. The middle coating can meet the covering effect and interlayer adhesion effect of the product in the region, the plate with lower gram weight has poor sealing performance, the bubble phenomenon is easy to generate in the baking and curing process, and the using amount of the paint with higher gram weight is large.
Preferably, in the fifth step), the gram weight of the PU paint is 50-60 g/m2. The PU paint can cover the surface of the base material within the range, the middle coating can be exposed when the covering power of the paint of the plate is low, and the using amount of the paint is large when the gram weight is high.
Preferably, in the fifth step), the high-temperature curing temperature in the oven is 80-90 ℃. The continuous production of production can be met at the temperature, the PU paint is not completely cured at the too low temperature, the temperature is too high, and the honeycomb composite board made of the PP material serving as the base material is easy to deform and warp.
Preferably, in the sixth step), the gram weight of the UV varnish is 35-75 g/m2. The varnish is a PU paint protective film, the gram weight is too low to protect a paint film, and the gram weight is too high to use a large amount of paint.
Preferably, in step four), the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above. The middle coating is cured by a UV lamp, and the energy is low, so that insufficient curing is easy to occur, and the interlayer adhesive force is influenced.
Preferably, in step six), the UVA energy of the top-coating curing lamp is 1000j/cm2Above, UVV energy is 2000j/cm2The above. The surface coating is cured by a UV lamp, and the energy is low, so that insufficient curing is easy to occur, and the interlayer adhesive force is influenced.
A composite board prepared by the PU quick-drying coating process.
In conclusion, the invention has the following beneficial effects: the plate is treated by the plasma spray gun, the surface energy is improved, and the existing problems are overcome by the process of combining roller coating and spraying. And only one-time color paint coating is carried out, so that the paint cost is effectively saved.
Drawings
FIG. 1 is a process flow diagram of the present invention;
Detailed Description
The invention is further described with reference to the accompanying drawings.
The embodiment discloses a PU quick-drying coating process of a novel efficient thermoplastic composite board and a composite board prepared by the same, wherein a process flow chart is shown in figure 1, and the process flow chart specifically comprises the following steps:
step one), carrying out plasma spray gun treatment on the surface of the plate (1-3 min);
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5-20 g/m2Preferably, the gram weight of the PP treatment water is 10-15 g/m2Carrying out infrared baking for 2-3 min;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20-25 g/m2Leveling for 1-3 min through a drying tunnel, and curing in a floating coat curing chamber for 2-3 min;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50-65 g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above (2-3 min);
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40-70 g/m2Preferably, the gram weight of the PU paint is 50-60 g/m2Then, curing at a high temperature in an oven, wherein the temperature is 80-90 ℃ (8-10 min);
step six), roller coating of UV varnish, wherein the gram weight of the UV varnish is 35-75 g/m2Preferably, the gram weight of the UV varnish is 50-60 g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2Above, finally obtaining the compoundPlate (2-3 min).
The specific embodiment comprises the following process steps and process parameters:
example 1:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking with infrared ray for min;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 55g/m2Then, curing at high temperature of 85 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 2:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 25g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 60g/m2Then, curing at high temperature of 85 ℃ in an oven for 10 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 45g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 3:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), carrying out roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 10g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 2min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 65g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 60g/m2Then, curing at a high temperature of 80 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 4:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), carrying out roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 15g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 65g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 50g/m2Then, curing at high temperature in an oven at 90 ℃ for 12 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 5:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 65g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 60g/m2Then, curing at high temperature in an oven at 90 ℃ for 8 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 6:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 1min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 50g/m2Then, curing at a high temperature of 80 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 7:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 60g/m2Preferably, the PU paint has a grammage of 60g/m2Then, curing at high temperature in an oven at 90 ℃ for 6 min;
step six), rolling and coating UV varnish by roller, wherein the gram weight of the UV varnish is 50/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 8:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), carrying out roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 10g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 55g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 60g/m2Preferably, the PU paint has a grammage of 55g/m2Then, curing at high temperature in an oven at 90 ℃ for 5 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 500j/cm2Above, UVV energy is 1000j/cm2And finally obtaining the composite board.
Example 9:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 1min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 35g/m2Preferably, the PU paint has a grammage of 50g/m2Then, curing at a high temperature of 80 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 10:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, and middle coating paint gramWeighing 20g/m2Leveling for 1min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 80g/m2Then, curing at a high temperature of 80 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish, wherein the gram weight of the UV varnish is 35g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 11:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 1min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 80g/m2Then, curing at a high temperature of 80 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish by roller, wherein the gram weight of the UV varnish is 20g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Example 12:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 2min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 1min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 80g/m2Then, curing at a high temperature of 80 ℃ in an oven for 8 min;
step six), rolling and coating UV varnish by roller, wherein the gram weight of the UV varnish is 75g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Comparative example 1: (the surface of the plate was not treated with a plasma spray gun)
Step one), carrying out roller coating on a plate with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 3min with infrared;
step two), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step three), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step four), spraying one PU paintThe gram weight of the PU paint is 50g/m2Preferably, the PU paint has a grammage of 55g/m2Then, curing at high temperature in an oven at 90 ℃ for 8 min;
step five), rolling the UV varnish by roller, wherein the gram weight of the UV varnish is 50g/m2Preferably, the UV varnish has a grammage of 50g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Comparative example 2: (without forward and reverse roller midway paint)
Step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 60g/m2Then, curing at high temperature of 85 ℃ in an oven for 10 min;
step five), rolling UV varnish by roller, wherein the gram weight of the UV varnish is 60g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Comparative example 3: (without spraying PU paint)
Step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 5g/m2Preferably, the grammage of the PP-treated water is 15g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Then is leveled by a drying tunnel2min, curing in a floating coat curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 50g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), rolling and coating UV varnish by roller, wherein the gram weight of the UV varnish is 40g/m2Preferably, the UV varnish has a grammage of 60g/m2Curing with a top-coat curing lamp having a UVA energy of 1000j/cm2Above, UVV energy is 2000j/cm2And finally obtaining the composite board.
Comparative example 4: (UV varnish without roller coating)
Step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) with PP (polypropylene) treatment water, wherein the gram weight of the PP treatment water is 20g/m2Preferably, the grammage of the PP-treated water is 10g/m2Baking for 3min with infrared;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 20g/m2Leveling for 3min through a drying tunnel, and curing in a middle coating curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 60g/m2Simultaneously, the low-energy curing of the intermediate coating curing lamp is carried out, and the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40g/m2Preferably, the PU paint has a grammage of 55g/m2And then curing at a high temperature of 90 ℃ in an oven for 12min to obtain the composite board.
Characterization of the properties of the panels of the specific examples and of the panels of the comparative examples:
TABLE 1 characterization of the Properties of the sheets of examples 1-6
Figure BDA0002348333470000101
Figure BDA0002348333470000111
TABLE 2 characterization of the Properties of the plaques of examples 7-12
Figure BDA0002348333470000112
Figure BDA0002348333470000121
TABLE 3 characterization of the Properties of the sheets of comparative examples 1-4
Figure BDA0002348333470000122
Comparing examples 1-12 with comparative examples 1-4, we can invent that each process step of the invention has an important impact on the performance of the sheet. The invention realizes a continuous one-step forming process by matching a plurality of process steps, the time consumption of the whole process steps is about 0.5h, and is about 48h compared with the time consumption of the existing coating, so that the coating time is greatly shortened. By comparing examples 7-12 with comparative examples, we can see that the influence of the use amounts of the PU paint and the UV varnish on the performance of the plate is large, and the use amounts of the PU paint and the UV varnish are too large or too small, so that the adhesion, high temperature resistance and temperature difference resistance of the plate prepared by the PU paint and the UV varnish are weakened. In conclusion, under the specific coating process conditions, the substrate is subjected to the early plasma spray gun treatment and the later process selection and optimization, so that the plate with better performance is prepared. Meanwhile, compared with the existing coating process, the coating process disclosed by the invention is short in time consumption in the whole process, low in VOC (volatile organic compound) emission and capable of realizing continuous one-step forming.

Claims (10)

1. A novel PU quick-drying coating process for efficient thermoplastic composite boards is characterized by comprising the following steps: the method comprises the following steps:
step one), carrying out plasma spray gun treatment on the surface of the plate;
step two), performing roller coating on the plate obtained in the step one) to obtain PP (polypropylene) treated waterThe gram weight of the PP treatment water is 5-20 g/m2Carrying out infrared baking for 2-3 min;
step three), spraying one-pass single-roller middle coating paint, wherein the gram weight of the middle coating paint is 15-35 g/m2Leveling for 1-3 min through a drying tunnel, and curing in a floating coat curing chamber;
step four), coating paint in the positive and reverse rollers, wherein the gram weight of the paint in the middle coating is 55-75 g/m2Simultaneously, carrying out low-energy curing by a middle coating curing lamp;
step five), spraying a PU paint, wherein the gram weight of the PU paint is 40-70 g/m2Then curing at high temperature in an oven;
step six), roller coating of UV varnish, wherein the gram weight of the UV varnish is 35-75 g/m2And curing by using a surface coating curing lamp to obtain the composite board.
2. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: in the second step), the gram weight of the PP treatment water is 10-15 g/m2。
3. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: in the third step), the gram weight of the middle coating paint is 20-25 g/m2。
4. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: in the fourth step), the gram weight of the middle coating paint is 50-65 g/m2。
5. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: in the fifth step), the gram weight of the PU paint is 50-60 g/m2。
6. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: and step five), the high-temperature curing temperature in the oven is 80-90 ℃.
7. Root of herbaceous plantThe PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, which is characterized in that: in the sixth step), the gram weight of the UV varnish is 50-60 g/m2。
8. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: in the fourth step), the UVA energy of the intermediate coating curing lamp is 500j/cm2Above, UVV energy is 1000j/cm2The above.
9. The PU quick-drying coating process of the novel efficient thermoplastic composite board as claimed in claim 1, wherein: in the sixth step), the UVA energy of the surface coating curing lamp is 1000j/cm2Above, UVV energy is 2000j/cm2The above.
10. A composite board prepared by the PU quick-drying coating process according to any one of claims 1 to 9.
CN201911404704.4A 2019-12-31 2019-12-31 Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same Pending CN111167687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911404704.4A CN111167687A (en) 2019-12-31 2019-12-31 Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911404704.4A CN111167687A (en) 2019-12-31 2019-12-31 Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same

Publications (1)

Publication Number Publication Date
CN111167687A true CN111167687A (en) 2020-05-19

Family

ID=70650530

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911404704.4A Pending CN111167687A (en) 2019-12-31 2019-12-31 Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same

Country Status (1)

Country Link
CN (1) CN111167687A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106272802A (en) * 2016-08-03 2017-01-04 东北林业大学 A kind of water coating transfer wood plastic product and preparation method thereof
CN206753335U (en) * 2017-01-20 2017-12-15 东北林业大学 A kind of structural shape and wood moulding window frame

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106272802A (en) * 2016-08-03 2017-01-04 东北林业大学 A kind of water coating transfer wood plastic product and preparation method thereof
CN206753335U (en) * 2017-01-20 2017-12-15 东北林业大学 A kind of structural shape and wood moulding window frame

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
刘波等: "《汽车涂装美容技术问答》", 31 July 2008, 金盾出版社 *
天津油漆厂等: "《油漆结构学与施工（上册）》", 31 May 1978, 国防工业出版社 *
徐俊才等: "《装饰工程》", 31 December 1985, 中国建筑工业出版社 *
王锡春: "《最新汽车涂装技术》", 30 April 1999, 机械工业出版社 *
耿孝正: "《塑料机械的使用与维护》", 31 August 1998, 中国轻工业出版社 *
蔡莹莹等: "水披覆转印技术对PP、PE木塑材表面装饰", 《森林工程》 *

Similar Documents

Publication Publication Date Title
CN101574689B (en) Energy-saving coating process
CN108787388A (en) It is a kind of to form the production technology and production equipment of DE Specular Lighting decorative effect on artificial board surface using powdery paints
CN104526818A (en) Full-UV soft coiled material veneer and preparation process thereof
WO2010022589A1 (en) Method for manufacturing ecotypic artificial leather or leather-like and automatic assembly line thereof
CN112354824A (en) Coating process of skin-feel veneer and application thereof
CN108940792A (en) A kind of powder coating process on wood furniture surface
CN105413990A (en) LED-UV curing and coating method and application thereof
CN102615688A (en) Painted flexible wood veneer processing method and painted flexible wood veneer product
CN111167687A (en) Novel PU quick-drying coating process for efficient thermoplastic composite board and composite board prepared by same
WO2021189501A1 (en) Non-pvc substrate-type 3d printed flooring and preparation method therefor
CN205761996U (en) UV paint electrostatic spraying and LED UV curing system
CN207756452U (en) It is a kind of to form the production equipment of DE Specular Lighting decorative effect on artificial board surface using powdery paints
WO2018214763A1 (en) Multi-ply waterproof solid wood composite floor and production method
CN112371466A (en) Three-dimensional crack coating, preparation method thereof, lamp fitting and lamp
CN107649347A (en) A kind of UV roller coat black opens matte surface coating construction process
CN106956477B (en) Clad steel plate manufacturing method and clad steel plate
CN114433454B (en) Furniture paint baking method
CN111070957A (en) Sanding-free decorative pattern veneer processing technology
CN105032732A (en) Furniture antiquing technology application method
WO2013097188A1 (en) Process for finishing bamboo floor surface
CN111167688A (en) Preparation process of high-flatness composite board
CN115318597A (en) Surface coating method for wood base material
CN112403862A (en) High-flatness high-adhesion UV decorative plate and processing method thereof
CN102922417A (en) Manufacturing technology for composite board
CN110961329B (en) Spraying method of aluminum profile and aluminum profile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200519