CN101173125A

CN101173125A - Solution and technique for removing painting on plastic rubber surface

Info

Publication number: CN101173125A
Application number: CNA2006101231719A
Authority: CN
Inventors: 陈其亮; 汪克风; 岳瑟
Original assignee: Mitac Precision Technology Shunde Ltd
Current assignee: Mitac Precision Technology Shunde Ltd
Priority date: 2006-10-31
Filing date: 2006-10-31
Publication date: 2008-05-07

Abstract

The invention discloses a solution for depriving the oil paint on a surface of plastic and the technique thereof. The depainting solution disclosed in the invention includes the components by weight proportion: 5 to 20 percent of normal butanol, 10 to 40 percent of NaOH, 20 to 90 percent of water and 0.1 to 0.5 percent of dodecyl sodium sulfate. The technique comprises the steps as follows: a, pretreatment is conducted to eliminate the appurtenance of the plastic; b, the plastic is dipped in the depainting solution; c, the plastic is heated, and is resonated by supersonic; d, the plastic is then washed with water, and dried to eliminate the chemical medicine on the surface, and then dried again. Through the steps above, the invention realizes the effects of causing small pollution during the depainting process without influencing the performance of the plastic and lowering the depainting cost.

Description

Remove the solution and the technology of painting on plastic rubber surface

Technical field

The present invention relates to a kind of solution and technology that removes paint, particularly relate to a kind of solution and technology that removes painting on plastic rubber surface.

Background technology

The method of conventional plastic topcoating removal has the filtration of extrusion, organic solvent removal, sandblast coating removal method and low temperature coating removal method etc.

Current treatment process to the scrap products of spraying paint that produces in the plastic working process mainly contains: (1) with an organic solvent as toluene, dimethylbenzene, and various ester classes etc. are carried out the surface and are cleaned, and reach the depainting purpose; (2) directly pulverize, be used as filler use or degradation and use; (3) burn or bury.

The main drawback of above method is: (1) organic solvent pollutes big, and is big to the pressure that causes of environment, serious to the human injury; (2) be not suitable for scale operation; (3) being used as filler use or degradation uses economical inadequately.

Summary of the invention

For addressing the above problem, the present invention proposes a kind of little, as not influence plastics performance, solution that removes painting on plastic rubber surface and technology that the depainting cost is low polluted.

Technical scheme of the present invention is: a kind of solution that removes painting on plastic rubber surface, and its component and shared mass percent are:

Propyl carbinol 5～20%

NaOH (sodium hydroxide) 10～40%

Water 20～90%

Sodium dodecylbenzene sulfonate 0.1～0.5%

A kind of technology that removes painting on plastic rubber surface the steps include:

A. pre-treatment comprises and removes on the plastic parts irrelevant thing such as metalwork and nut etc., reduces the discard size and make the adaptive response groove;

B. immerse depainting solution, the plastic parts that pre-treatment is good immerses in the depainting solution;

C. heating is heated to temperature required, ultrasonic resonance together with solution and plastic parts;

D. washing, drying are washed after the plastic parts behind the depainting taken out from reactive tank to remove the pharmaceutical chemicals on surface, dry then;

Use for after convenient, cleaning, dried plastic parts can be pulverized, it is stand-by to pack.

Wherein, temperature required among the above-mentioned steps c is 50～80 ℃.

Wherein, the frequency of ultrasonic resonance can be 20～40KHZ among the above-mentioned steps c.

Description of drawings

Fig. 1 process flow diagram of the present invention.

Embodiment

Embodiments of the invention below are described in detail in detail with reference to the accompanying drawings.

A kind of solution that removes painting on plastic rubber surface, its component and shared mass percent are:

Propyl carbinol 5～20%

NaOH 10～40％

Water 20～90%

Sodium dodecylbenzene sulfonate 0.1～0.5%

Wherein a screening formulation solution is, a kind of solution that removes painting on plastic rubber surface, and its component and shared mass percent are:

Propyl carbinol 5%

NaOH 10％

Water 85%

Sodium dodecylbenzene sulfonate 0.2%

For reaching better paint removing effect, the present invention uses a kind of technology that removes painting on plastic rubber surface, at first, gets a plastic parts and sprays paint and scrap sample, removes thing such as metalwork and nut etc. irrelevant on the plastic parts, reduces the discard size and make the adaptive response groove; Then, this through the plastic parts after handling early stage, is immersed depainting solution, the plastic parts that pre-treatment is good immerses in the depainting solution; After more above-mentioned solution and plastic parts being heated to 50～80 ℃ together, carry out ultrasonic resonance, the frequency of resonance can be 20～40KHZ, the time is 2～5 minutes; Be again wash after the plastic parts behind the depainting is taken out from reactive tank with remove the surface pharmaceutical chemicals, and the oven dry; At last, for using convenient next time, the plastic parts after cleaning is pulverized, it is stand-by to pack.

One sample sprays paint and scraps plastic parts, in 60 ℃ depainting solution, be aided with the ultrasonic resonance depainting 3min of 20KHZ after, paint decreasing ratio in surface is approximately 99%, the colourless change of any surface finish and color even.

Pulverize behind the depainting and expect with depainting pulverizing material and material performance contrast are not as follows:

Project	Testing standard	Raw material	Depainting is pulverized material	Depainting is not pulverized material
Project	Testing standard	Raw material	Depainting is pulverized material	Depainting is not pulverized material	Shock strength (KJ/CM ²)	GB/T1843-19 96	31	24.9	13
Tensile strength (MPa)	GB/T1040-19 92	60	59.2	55	Shock strength (KJ/CM ²)	GB/T1843-19 96	31	24.9	13
Tensile strength (MPa)	GB/T1040-19 92	60	59.2	55	Flexural strength (MPa)	GB/T9341-20 00	90	90.63	91

The present invention is the novel processing method that removes working of plastics surface paint, and the mode of using the depainting solution of this development in laboratory to be aided with mechanical agitation is carried out volume production, and is simple efficient, and has following advantage concurrently:

1. organic volume content is low, and paint stripper is convenient to recycling, pollutes little;

2. the plastics material is not had dissolution, do not affect the performance of plastics, can directly utilize or the modification use;

3. cost is low, can reclaim on a large scale operation;

Claims

1. solution that removes painting on plastic rubber surface, it is characterized in that: this solution component and shared mass percent are:

Propyl carbinol 5～20%;

NaOH 10～40％；

Water 20～90%;

Sodium dodecylbenzene sulfonate 0.1～0.5%.

2. technology that removes painting on plastic rubber surface, it is characterized in that: step is

A. unnecessary appurtenant is removed in pre-treatment;

B. immerse depainting solution;

C. the heating, ultrasonic resonance;

D. washing, drying are removed the pharmaceutical chemicals on surface, then oven dry;

3. a kind of technology that removes painting on plastic rubber surface according to claim 2 is characterized in that: cleaning, dried plastic parts can be pulverized, it is stand-by to pack.

4. a kind of technology that removes painting on plastic rubber surface according to claim 2 is characterized in that: wherein, temperature required among the above-mentioned steps c is 50～80 ℃.

5. a kind of technology that removes painting on plastic rubber surface according to claim 2 is characterized in that: wherein, the frequency of ultrasonic resonance is 20～40KHZ among the above-mentioned steps c.

6. according to the described a kind of technology that removes painting on plastic rubber surface of claim 1-5, it is characterized in that: its component and shared mass percent are:

Propyl carbinol 5%;

NaOH 10％；

Water 85%;

Sodium dodecylbenzene sulfonate 0.2%.