CN114700240A - Paint spraying treatment process for fiber reinforced resin section - Google Patents
Paint spraying treatment process for fiber reinforced resin section Download PDFInfo
- Publication number
- CN114700240A CN114700240A CN202210273122.2A CN202210273122A CN114700240A CN 114700240 A CN114700240 A CN 114700240A CN 202210273122 A CN202210273122 A CN 202210273122A CN 114700240 A CN114700240 A CN 114700240A
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- CN
- China
- Prior art keywords
- fiber reinforced
- reinforced resin
- paint spraying
- section
- temperature plasma
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- 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.)
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Classifications
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- 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
- B05D3/144—Pretreatment of polymeric substrates
Abstract
The invention discloses a paint spraying treatment process for a fiber reinforced resin section, which is characterized in that the fiber reinforced resin section continuously moves in low-temperature plasma generated by an atmospheric low-temperature plasma treatment machine to clean the surface of the fiber reinforced resin section, and simultaneously changes the molecular structure of the surface to generate free radicals, wherein the free radicals can perform a cross-linking reaction with a water-based polyurethane coating to increase the adhesive force. The invention changes the molecular structure of the surface of the fiber reinforced resin composite material pultrusion section bar and increases the roughness of the surface of the fiber reinforced resin composite material so as to achieve the purpose of improving the adhesive force of the coating on the surface of the material.
Description
Technical Field
The invention relates to a paint spraying treatment process for fiber reinforced resin pultruded profiles, belonging to the technical field of spraying processes.
Background
The composite material pultrusion section bar generally has the characteristics of high strength, medium modulus, medium corrosion resistance and the like, so that the application scene of the composite material pultrusion section bar is very wide. However, composites often suffer from insufficient photoaging durability, which can be detrimental in outdoor application scenarios. The most commonly used method for solving the problem of photoaging durability is to coat the composite material with a durable coating. Especially the current requirements of environmental protection and the like require that the coating has excellent environment. There is a inevitable trend toward replacing oil-soluble coating with water-based coating.
In the production process of the glass fiber reinforced polyurethane resin pultruded profile, a layer of release agent usually exists on the surface, and the release agent is solidified in a mould, so that the surface of the material is usually very smooth, and the factors are not favorable for the good adhesion of a coating on the surface of the composite material during coating. Therefore, before coating the composite material, surface treatment is needed to remove the release agent and increase the roughness of the surface of the material. Increasing the affinity of the water paint.
The conventional processing method includes: cleaning, polishing, sand blasting, flame treating and the like, but all of the treating methods have certain inconvenience and unreliability. The cleaning process needs a cleaning agent, residual risks exist, and meanwhile, the cleaning method cannot increase the roughness of the surface of the material; the polishing process is suitable for processing large-plane materials, but is very inconvenient for processing the surfaces of materials with more special-shaped structures; the requirements of removing the release agent and improving the surface roughness can be met when the surface of the material is treated by the sand blasting process, but the process is easy to cause the problem that the coating decorative effect of the material is influenced by overlarge roughness; flame treatment is effective in removing the release agent, but has an insignificant effect of increasing the roughness of the material surface, and thus has poor reliability in promoting adhesion.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem of poor adhesive force when the surface of the existing fiber reinforced resin composite material pultruded section is painted.
In order to solve the technical problems, the invention provides a fiber reinforced resin section paint spraying treatment process, which is characterized in that the fiber reinforced resin section is continuously moved in low-temperature plasma generated by an atmospheric low-temperature plasma treatment machine to clean the surface of the fiber reinforced resin section, and the molecular structure of the surface is changed to generate free radicals, wherein the free radicals can perform a crosslinking reaction with an aqueous polyurethane coating to increase the adhesive force.
Preferably, the material of the fiber reinforced resin section is fiber reinforced aromatic polyurethane.
Preferably, the power of the atmospheric low-temperature plasma processor is 1000-5000W.
Preferably, the speed of the fiber reinforced resin profile continuously moving in the atmosphere low-temperature plasma treatment machine is 2-20 m/min.
Preferably, the free radical comprises at least one of hydroxyl and carboxyl.
Preferably, the aqueous polyurethane coating is an aqueous acrylic polyurethane coating or a hydroxyl-containing aqueous fluorocarbon-polyurethane coating.
The invention relates to a spray painting treatment process for a fiber reinforced resin composite material section, in particular to a treatment process for removing a release agent from a fiber reinforced resin composite material pultruded section through plasma action and changing the surface molecular structure of the section to carry out water-based coating.
The core content of the invention is to change the molecular structure of the surface of the fiber reinforced resin composite material pultrusion section bar and increase the roughness of the surface of the fiber reinforced resin composite material so as to achieve the purpose of improving the adhesive force of the coating on the surface of the material.
The adhesion force of the surface paint sprayed on the fiber reinforced resin composite material pultruded section treated by the process can reach 0-1 grade according to the marking test (GB/T9286) of paint films of colored paint and varnish.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below.
Example 1
A paint spraying treatment process for fiber reinforced resin profiles comprises the following steps:
the fiber reinforced resin section is a glass fiber reinforced polyurethane composite material door and window pultrusion section, the section is irradiated under 2000W power plasma by adopting an atmospheric low-temperature plasma processor, and the operation speed of the section is 8 m/min. The material surface tension rose from 25 dynes to 45 dynes.
After the surface of the treated section bar is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested to be 0 grade by a grid cutting method. And after the surface of the section bar which is not subjected to the plasma surface treatment is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested by a grid cutting method to be 3-grade.
Example 2
A paint spraying treatment process for fiber reinforced resin profiles comprises the following steps:
the fiber reinforced resin section is a glass fiber reinforced polyurethane composite material door and window pultrusion section, the section is irradiated under 1000W power plasma by adopting an atmospheric low-temperature plasma processor, and the operation speed of the section is 12 m/min. The material surface tension rose from 25 dynes to 40 dynes.
After the surface of the treated section bar is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested to be 1 grade by a grid marking method. And after the surface of the section bar which is not subjected to the plasma surface treatment is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested by a grid cutting method to be 3-grade.
Example 3
A paint spraying treatment process for fiber reinforced resin profiles comprises the following steps:
the fiber reinforced resin section is a glass fiber reinforced polyurethane composite material door and window pultrusion section, the section is irradiated under 5000W power plasma by adopting an atmospheric low-temperature plasma processor, and the operation speed of the section is 20 m/min. The material surface tension rose from 25 dynes to 45 dynes.
After the surface of the treated section bar is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested to be 0 grade by a grid cutting method. And after the surface of the section bar which is not subjected to the plasma surface treatment is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested by a grid cutting method to be 3-grade.
Example 4
A paint spraying treatment process for fiber reinforced resin profiles comprises the following steps:
the fiber reinforced resin section is a glass fiber reinforced polyurethane composite material door and window pultrusion section, the section is irradiated under 1500W power plasma by adopting an atmospheric low-temperature plasma processor, and the operation speed of the section is 2 m/min. The material surface tension rose from 25 dynes to 50 dynes.
After the surface of the treated section bar is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested to be 0 grade by a grid cutting method. And after the surface of the section bar which is not subjected to the plasma surface treatment is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested by a grid cutting method to be 3-grade.
Example 5
A paint spraying treatment process for fiber reinforced resin profiles comprises the following steps:
the fiber reinforced resin section is a glass fiber reinforced polyurethane composite material door and window pultrusion section, the section is irradiated under 3000W power plasma by adopting an atmospheric low-temperature plasma processor, and the operation speed of the section is 15 m/min. The material surface tension rose from 25 dynes to 40 dynes.
After the surface of the treated section bar is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested by a grid cutting method to be 1 grade. And after the surface of the section bar which is not subjected to the plasma surface treatment is sprayed by adopting the water-based acrylic acid-polyurethane coating, the adhesive force is tested by a grid cutting method to be 3-grade.
Claims (6)
1. A paint spraying treatment process for fiber reinforced resin section is characterized in that the fiber reinforced resin section continuously moves in low-temperature plasma generated by an atmospheric low-temperature plasma treatment machine to clean the surface of the fiber reinforced resin section, and simultaneously changes the molecular structure of the surface to generate free radicals which can perform a crosslinking reaction with an aqueous polyurethane coating to increase the adhesive force.
2. The paint spraying process for fiber reinforced resin sections according to claim 1, wherein the material of the fiber reinforced resin sections is fiber reinforced aromatic polyurethane.
3. The paint spraying process for fiber reinforced resin sections according to claim 1, wherein the power of the atmospheric low-temperature plasma processor is 1000 to 5000W.
4. The paint spraying process for fiber reinforced resin profiles according to claim 1, wherein the rate of continuous movement of the fiber reinforced resin profiles in the atmospheric low temperature plasma treatment machine is 2 to 20 m/min.
5. The paint spraying process for fiber reinforced resin sections according to claim 1, wherein the free radicals include at least one of hydroxyl groups and carboxyl groups.
6. The paint spraying process of fiber reinforced resin section as claimed in claim 1, wherein the water-based polyurethane paint is water-based acrylic acid-polyurethane paint or hydroxyl-containing water-based fluorocarbon-polyurethane paint.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210084839 | 2022-01-25 | ||
| CN2022100848392 | 2022-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114700240A true CN114700240A (en) | 2022-07-05 |
Family
ID=82168164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210273122.2A Withdrawn CN114700240A (en) | 2022-01-25 | 2022-03-19 | Paint spraying treatment process for fiber reinforced resin section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114700240A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003221458A (en) * | 2002-01-29 | 2003-08-05 | Nagase Chemtex Corp | Method for adhesion of thermosetting resin-molded products |
| CN106903910A (en) * | 2015-12-23 | 2017-06-30 | 科思创聚合物（中国）有限公司 | The coating process of polyurethane molded through pultrusion of composite material |
| WO2019188020A1 (en) * | 2018-03-27 | 2019-10-03 | 東レ株式会社 | Internal mold release agent for fiber-reinforced composite material, fiber-reinforced composite material, molding method therefor, and joining method for fiber-reinforced resin molded product |
-
2022
- 2022-03-19 CN CN202210273122.2A patent/CN114700240A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003221458A (en) * | 2002-01-29 | 2003-08-05 | Nagase Chemtex Corp | Method for adhesion of thermosetting resin-molded products |
| CN106903910A (en) * | 2015-12-23 | 2017-06-30 | 科思创聚合物（中国）有限公司 | The coating process of polyurethane molded through pultrusion of composite material |
| WO2019188020A1 (en) * | 2018-03-27 | 2019-10-03 | 東レ株式会社 | Internal mold release agent for fiber-reinforced composite material, fiber-reinforced composite material, molding method therefor, and joining method for fiber-reinforced resin molded product |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220705 |