CN109821709A - A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints - Google Patents
A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints Download PDFInfo
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- CN109821709A CN109821709A CN201910143571.3A CN201910143571A CN109821709A CN 109821709 A CN109821709 A CN 109821709A CN 201910143571 A CN201910143571 A CN 201910143571A CN 109821709 A CN109821709 A CN 109821709A
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- transfer printing
- wood grain
- spraying process
- printing wood
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Abstract
The invention discloses a kind of spraying process for protecting transfer printing wood grain powdery paints; the following steps are included: the transparent powder paint of S1, preparation protection transfer printing wood grain: S2, high pressure electrostatic painting: the transparent powder paint that step S1 is obtained; it is sprayed on transfer printing wood grain coating using high-pressure electrostatic spray gun, obtains protection film A；S3, pretreatment: the protection film A that step S2 is obtained carries out heated-air drying, obtains protection film；S4, solidification: the protection film that step S3 is obtained is solidified using infrared, obtains transfer printing wood grain protective film.Spraying process of the invention effectively reduces solidification temperature, sprayed coating film is only 10-20 μm, and low energy consumption, and the transfer printing wood grain protective film ply adhesion of preparation is good, while having good flatness and anti-impact force.
Description
Technical field
The invention belongs to coating spraying technology fields, and in particular to a kind of spraying work for protecting wood grain thermal transfer powdery paints
Skill and the powdery paints.
Background technique
Transfer printing wood grain is a kind of common coating metal surfaces technology, is to be turned the figure wood grain on printing plate by transfer materials
Print to process and process that stock gets on.Transfer printing wood grain will not change the mechanical performance of original profile coating, as hardness,
Wearability, impact resistance, the performances such as salt fog, aging, be widely used in aluminum alloy doors and windows, security door, fire resistant doorsets, furniture of steel and wood,
The metal material resistant to high temperature such as file cabinet, computer casing, household electrical appliance, metal ornament.
In order to protect transfer printing wood grain coating, existing transfer printing wood grain mental section usually requires again one layer of solvent type of outer cover and applies
Material.But in recent years, with the raising of environmental requirement, the application of the solvent based coating of high pollution has been subjected to more and more limiting
System.Meanwhile the ink of transfer printing wood grain keeps wood grain unintelligible or even becomes nothing in 170 DEG C or more meeting high temperature distillations in the prior art, and
Transparent powder currently on the market, solidification temperature is higher, and (indoor transparent powder solidification temperature is 180 DEG C, outdoor transparent powder solidification
Temperature is 190-200 DEG C), it is not particularly suited for the coating protection of transfer printing wood grain.Therefore, a kind of transfer printing wood grain that can protect is needed
Transparent powder paint.
Current global environment situation is increasingly serious, promotes global environmental protection very urgent, for coating industry, even more
Urgent need environmental protection coating material and nuisanceless coating process.Electrostatic powder spraying is with its energy-efficient property, film superiority, yield rate
It is high, reuse ratio is high, simple operation and it is easy to use the advantages that, be widely used in household electrical appliance, machinery instrument, kitchen tools,
The numerous areas such as furniture, automobile, construction material, garden furniture, means of transportation and pipeline corrosion protection.
CN108372091A discloses a kind of spraying process of high Wood-grain-imitating powdery paints of solid, using hot air circulation plus
Heat cure furnace or natural gas catalyst catalysis burning MID INFRARED radiant heating curing oven solidify 10 at 200~210 DEG C~
12min forms high Wood-grain-imitating.
CN105344566A discloses a kind of preparation spraying of compound high dissipated motor powdery paints of acrylic acid sial
Technique distinguishes sprayed layer undercoat powdery paints and surface layer powdery paints using high-pressure electrostatic spray gun, passes through thermostatic drying chamber after spraying
Solidify at 180 DEG C, obtaining coating thickness is 60-80um and 120-160um.
During powder paint, the curing process control of coating is a critical control point, directly affects powder
The coating performance of coating product.And there are solidification temperature height for existing powder paint technique, consume energy big, and it is many to apply film thickness etc.
Therefore problem needs to develop a kind of efficient spraying process carried out for protection transfer printing wood grain powdery paints.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of sprayings for protecting transfer printing wood grain powdery paints
Technique and the powdery paints, which effectively reduces solidification temperature, sprayed coating film is only 10-20 μm, and low energy consumption, system
Standby transfer printing wood grain protective film ply adhesion is good, while having good flatness and anti-impact force.
The present invention provides a kind of spraying process for protecting transfer printing wood grain powdery paints, comprising the following steps:
The transparent powder paint of S1, preparation protection transfer printing wood grain:
(1) by 20-45 parts by weight terminal carboxyl polyester resin, 3-4 parts by weight diglycol terephthalate, 0.001-
0.005 parts by weight dibutyl tin dilaurate, 0.5-1 parts by weight nano silicone crystalline flour, 0.3-0.6 parts by weight levelling agent and 2-8
Parts by weight delustering agent, is placed in high-speed mixer and mixes, and obtains mixture A；
(2) the mixture A that step (1) obtains is squeezed out with double screw extruder, obtains mixture B；
(3) the mixture B that step (2) obtains is pulverized and sieved with vertical pulverizer, obtains the transparent of protection transfer printing wood grain
Powdery paints；
S2, high pressure electrostatic painting:
The transparent powder paint that step S1 is obtained is sprayed on transfer printing wood grain coating using high-pressure electrostatic spray gun, is obtained
Protect film A；
S3, pretreatment:
The protection film A that step S2 is obtained carries out heated-air drying, obtains protection film；
S4, solidification:
The protection film that step S3 is obtained is solidified using infrared, obtains transfer printing wood grain protective film.
Preferably, the acid value of terminal carboxyl polyester resin described in the step of step S1 (1) is 18-56mgKOH/g, softening
Point is 100-120 DEG C, 50-65 DEG C of glass transition temperature；The levelling agent is acrylate leveling agent；The delustering agent is propylene
Acid blend.
Preferably, one area of extrusion temperature of double screw extruder described in the step of step S1 (2) is 110-120 DEG C,
2nd area are 80-95 DEG C.
Preferably, described in step S2 protection film A with a thickness of 10-20 μm.
Preferably, the condition of spraying described in step S2 are as follows: spray voltage 60-80KV, air pressure of dusting are 0.05-
0.2Mpa, spray distance 16-30cm.
Preferably, the temperature of heated-air drying described in step S3 is 45-50 DEG C, drying time 10-20min.
Preferably, the wavelength of infrared light infrared described in step S4 is 2.4-2.7 μm.
Preferably, cured temperature described in step S4 is 135-160 DEG C, curing time 8-12min.
It is further preferred that the cured temperature is 135-140 DEG C, curing time 8-10min.
Meanwhile the application the present invention also provides above-mentioned spraying process in sprayed protection transfer printing wood grain powdery paints.
The invention has the benefit that
(1) provided by the present invention for the spraying process of protection transfer printing wood grain powdery paints, thicknesses of layers is reduced, is solidified
Temperature is low, improves the weatherability and wearability of sprayed product.
(2) present invention combined by heated-air drying and infrared curing, improve ply adhesion, film layer obtained it is saturating
Lightness is high, glossiness is low, water-tolerant.
(3) present invention is by adjusting terminal carboxyl polyester tree, diglycol terephthalate and dibutyl tin dilaurate
Mass ratio, preparation for protecting the transparent powder paint transparency of transfer printing wood grain good, solidification temperature is low, ply adhesion
By force.
Specific embodiment
Levelling agent used by the present embodiment is the transparent levelling agent 486C of TROY company；The delustering agent A is acrylic acid
Compound, the A9 of Guangzhou pool sum or Anhui scape at M-70. as described in delustering agent B be Ningbo South Sea chemistry XG603-1A.
Basic embodiment
The present invention provides a kind of spraying process for protecting transfer printing wood grain powdery paints, comprising the following steps:
The transparent powder paint of S1, preparation protection transfer printing wood grain:
(1) by 20-45 parts by weight terminal carboxyl polyester resin, 3-4 parts by weight diglycol terephthalate, 0.001-
0.005 parts by weight dibutyl tin dilaurate, 0.5-1 parts by weight nano silicone crystalline flour, 0.3-0.6 parts by weight levelling agent and 2-8
Parts by weight delustering agent, is placed in high-speed mixer and mixes, and obtains mixture A；
The acid value of the terminal carboxyl polyester resin is 18-56mgKOH/g, and softening point is 100-120 DEG C, glass transition temperature
50-65℃；The levelling agent is acrylate leveling agent；The delustering agent is acrylic acid mixture；The nanocrystalline silicon powder
Partial size be 20nm.
(2) the mixture A that step (1) obtains is squeezed out with double screw extruder, obtains mixture B；
One area of extrusion temperature of the double screw extruder is 110-120 DEG C, and 2nd area are 80-95 DEG C；
(3) the mixture B that step (2) obtains be crushed into 180 meshes with vertical pulverizer, obtains protection transfer printing wood grain
Transparent powder paint；
S2, high pressure electrostatic painting:
The transparent powder paint that step S1 is obtained is sprayed on transfer printing wood grain coating using high-pressure electrostatic spray gun, is obtained
With a thickness of 10-20 μm of protection film A；The spray voltage of the spray gun is 60-80KV, and air pressure of dusting is 0.05-0.2Mpa, spray
Applying distance is 16-30cm；
S3, protective coating pretreatment:
The protection film A that step S2 is obtained carries out heated-air drying, obtains protection film；
The temperature of the heated-air drying is 45-50 DEG C, drying time 10-20min；
S4, solidification:
The protection film that step S3 is obtained is solidified using infrared, obtains transfer printing wood grain protective film；It uses infrared
Infrared light wavelength be 2.4-2.7 μm, cured temperature be 135-160 DEG C, curing time 8-12min.
By adjusting the specific experiment parameter in the implementation of basis, embodiment 1-4 and comparative example 1- shown in following table have been obtained
4。
The glossiness test of film is tested according to method specified in GB/T 9754-2007.
The adhesive force intensity of film is tested according to method specified in GB/T 9286-1998.
The transparency of film according to national standards tested by method specified in GB/T 1721-1979.
The water resistance of film is tested according to method specified in GB/T 1733-1993.
Correlated performance detection is carried out according to the test method of GB5237.4 standard.
Table 1
According to embodiment 1-4 it is found that the spraying process and the powder of protection transfer printing wood grain powdery paints provided by the invention
The solidification temperature of coating, the spraying process is low, is 135-160 DEG C, and curing time is 8-12 minutes, and sprays the wood grain obtained and turn
The thickness for printing protective film is only 10-20 μm, and the transfer printing wood grain protective film ply adhesion of acquisition is good, while being had smooth well
Degree and anti-impact force, this is used to protect the transparency of the transparent powder paint of transfer printing wood grain good, and solidification temperature is low, ply adhesion
By force.
Only as described above, is only a preferred embodiment of the present invention, when the model that cannot limit implementation of the invention with this
It encloses, i.e., generally according to simple equivalent changes and modifications made by content documented by the claims in the present invention and description of the invention,
All it is still covered by the claims of the invention.It is searched in addition, abstract part and title are intended merely to auxiliary patent document
It seeks and being used, the interest field being not intended to limit the invention.
Claims (10)
1. a kind of spraying process for protecting transfer printing wood grain powdery paints, which comprises the following steps:
The transparent powder paint of S1, preparation protection transfer printing wood grain:
(1) by 20-45 parts by weight terminal carboxyl polyester resin, 3-4 parts by weight diglycol terephthalate, 0.001-0.005
Parts by weight dibutyl tin dilaurate, 0.5-1 parts by weight nano silicone crystalline flour, 0.3-0.6 parts by weight levelling agent and 2-8 parts by weight
Delustering agent is placed in high-speed mixer and mixes, and obtains mixture A；
(2) the mixture A that step (1) obtains is squeezed out with double screw extruder, obtains mixture B；
(3) the mixture B that step (2) obtains is pulverized and sieved with vertical pulverizer, obtains the transparent powder of protection transfer printing wood grain
Coating；
S2, high pressure electrostatic painting:
The transparent powder paint that step S1 is obtained is sprayed on transfer printing wood grain coating using high-pressure electrostatic spray gun, is protected
Film A；
S3, protective coating pretreatment:
The protection film A that step S2 is obtained carries out heated-air drying, obtains protection film；
S4, solidification:
The protection film that step S3 is obtained is solidified using infrared, obtains transfer printing wood grain protective film.
2. spraying process according to claim 1, which is characterized in that terminal carboxyl polyester described in (1) the step of step S1
The acid value of resin is 18-56mgKOH/g, and softening point is 100-120 DEG C, 50-65 DEG C of glass transition temperature；The levelling agent is third
Olefin(e) acid ester levelling agent；The delustering agent is acrylic acid mixture.
3. spraying process according to claim 1, which is characterized in that twin-screw extrusion described in (2) the step of step S1
One area of extrusion temperature of machine is 110-120 DEG C, and 2nd area are 80-95 DEG C.
4. spraying process according to claim 1, which is characterized in that described in step S2 protection film A with a thickness of 10-
20μm。
5. spraying process according to claim 1, which is characterized in that the condition of spraying described in step S2 are as follows: spraying electricity
Pressure is 60-80KV, and air pressure of dusting is 0.05-0.2Mpa, spray distance 16-30cm.
6. spraying process according to claim 1, which is characterized in that the temperature of heated-air drying described in step S3 is 45-
50 DEG C, drying time 10-20min.
7. spraying process according to claim 1, which is characterized in that infrared infrared waves described in step S4 are a length of
2.4-2.7μm。
8. spraying process according to claim 1, which is characterized in that cured temperature described in step S4 is 135-160
DEG C, curing time 8-12min.
9. spraying process according to claim 8, which is characterized in that cured temperature described in step S4 is 135-140
DEG C, curing time 8-10min.
10. application of -9 described in any item spraying process in protection transfer printing wood grain powdery paints according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143571.3A CN109821709A (en) | 2019-02-27 | 2019-02-27 | A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143571.3A CN109821709A (en) | 2019-02-27 | 2019-02-27 | A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints |
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| CN109821709A true CN109821709A (en) | 2019-05-31 |
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ID=66864571
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| CN201910143571.3A Pending CN109821709A (en) | 2019-02-27 | 2019-02-27 | A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints |
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|---|---|---|---|---|
| CN201320783Y (en) * | 2008-11-07 | 2009-10-07 | 胜狮货柜技术研发（上海）有限公司 | Composite bottom plate for folding box |
| CN108176567A (en) * | 2017-12-28 | 2018-06-19 | 合肥和安机械制造有限公司 | A kind of vacuum static electricity coating process |
| CN108948826A (en) * | 2018-07-18 | 2018-12-07 | 浙江超浪新材料有限公司 | A kind of terminal carboxyl polyester resin and preparation method thereof |
-
2019
- 2019-02-27 CN CN201910143571.3A patent/CN109821709A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201320783Y (en) * | 2008-11-07 | 2009-10-07 | 胜狮货柜技术研发（上海）有限公司 | Composite bottom plate for folding box |
| CN108176567A (en) * | 2017-12-28 | 2018-06-19 | 合肥和安机械制造有限公司 | A kind of vacuum static electricity coating process |
| CN108948826A (en) * | 2018-07-18 | 2018-12-07 | 浙江超浪新材料有限公司 | A kind of terminal carboxyl polyester resin and preparation method thereof |
Non-Patent Citations (5)
| Title |
|---|
| 《兵器工业科学技术辞典》编辑委员会: "《兵器工业科学技术辞典 环境工程、防腐与包装》", 31 May 1993, 国防工业出版社 * |
| 化学工业部合成材料老化研究所: "《高分子材料老化与防老化》", 31 December 1979, 化学工业出版社 * |
| 吴小源等: "《铝合金型材表面处理技术》", 30 April 2009, 冶金工业出版社 * |
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