A multi-stage pressurized fluorination treatment method for the surface of plastic parts

A technology for fluorination treatment and plastic parts, which is applied in the field of multi-stage pressurized fluorination treatment on the surface of plastic parts. It can solve the problems of surface modification and recovery, surface energy reduction, etc., and achieve surface energy improvement, increase binding force, and surface wetting tension. Value for long-lasting and stable effects

Active Publication Date: 2020-10-09
JRB PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) The surface of the material after flame and plasma treatment is still in a metastable state. This unstable high-energy state will inevitably cause energy release, resulting in recovery of surface modification;
[0010] (2) After the flame and plasma treatment, the surface is exposed to the air, which will adsorb small molecules in the air and cause the surface energy to decrease;

Method used

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  • A multi-stage pressurized fluorination treatment method for the surface of plastic parts
  • A multi-stage pressurized fluorination treatment method for the surface of plastic parts
  • A multi-stage pressurized fluorination treatment method for the surface of plastic parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: The surface treatment method for plastic parts consists of the following steps:

[0042] 1) Clean and dry the plastic parts;

[0043] 2) Put the dried plastic parts into the airtight reaction chamber of the fluorination equipment, feed nitrogen gas, and replace the air in the reaction chamber 4 times;

[0044] 3) Preheat the internal temperature of the reaction chamber to 40°C, and then pass a mixed gas of fluorine, nitrogen and oxygen to react. The volume ratio of fluorine and nitrogen in the mixed gas is 1:9, and the volume ratio of oxygen It is 1 / 400 of the volume of fluorine gas; the reaction is divided into the following five pressure stages:

[0045] In the first pressure stage, the internal pressure of the reaction chamber is adjusted to 5mbar;

[0046] In the second pressure stage, the internal pressure of the reaction chamber is adjusted to 20mbar;

[0047] In the third pressure stage, the internal pressure of the reaction chamber is adjusted t...

Embodiment 2

[0062] Embodiment 2: The surface treatment method for plastic parts consists of the following steps:

[0063] 1) Clean and dry the plastic parts;

[0064] 2) Put the dried plastic parts into the airtight reaction chamber of the fluorination equipment, feed nitrogen gas, and replace the air in the reaction chamber 4 times;

[0065] 3) Preheat the internal temperature of the reaction chamber to 40°C, and then pass a mixed gas of fluorine, nitrogen and oxygen to react. The volume ratio of fluorine and nitrogen in the mixed gas is 1:9, and the volume ratio of oxygen It is 1 / 400 of the volume of fluorine gas; the reaction is divided into the following five pressure stages:

[0066] In the first pressure stage, the internal pressure of the reaction chamber is adjusted to 8mbar;

[0067] In the second pressure stage, the internal pressure of the reaction chamber is adjusted to 15mbar;

[0068] In the third pressure stage, the internal pressure of the reaction chamber is adjusted t...

Embodiment 3

[0076] Embodiment 3: The surface treatment method for plastic parts consists of the following steps:

[0077] 1) Clean and dry the plastic parts;

[0078] 2) Put the dried plastic parts into the airtight reaction chamber of the fluorination equipment, feed nitrogen gas, and replace the air in the reaction chamber for 5 times;

[0079] 3) Preheat the internal temperature of the reaction chamber to 45°C, and then pass a mixed gas of fluorine, nitrogen and oxygen to react. The volume ratio of fluorine and nitrogen in the mixed gas is 1:8, and the volume ratio of oxygen It is 1 / 300 of the volume of fluorine gas; the reaction is divided into the following 4 pressure stages:

[0080] In the first pressure stage, the internal pressure of the reaction chamber is adjusted to 10mbar;

[0081] In the second pressure stage, the internal pressure of the reaction chamber is adjusted to 30mbar;

[0082] In the third pressure stage, the internal pressure of the reaction chamber is adjusted...

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Abstract

The invention discloses a multi-stage pressurized fluorination treatment method of the surface of a plastic part. According to the multi-stage pressurized fluorination treatment method, except for cleaning and drying the plastic part and replacing air inside a closed reaction chamber of fluorination equipment with nitrogen gas, a core technology is achieved by preheating the reaction chamber tillthe internal temperature is 35-45 DEG C and then inflating mixed gas of fluorine gas, nitrogen gas and oxygen gas, wherein the volume ratio of the fluorine gas to the nitrogen gas is 1:6 to 1:10 and the oxygen gas accounts for 1 / 200-1 / 400 of the volume of the fluorine gas; a reaction is divided into n pressure stages, n is a natural number of 2-5, the chamber pressure in a first pressure stage is5-10mbar, the pressure deltaP in an adjacent pressure stage increases to 5-100mbar, and the reaction time in each pressure stage is 3-10 minutes; finally, at the end of the reaction, the plastic partis taken out. By the multi-stage pressurized fluorination treatment method, the surface energy of the plastic part can be effectively improved and maintained stable, so that better bonding of the plastic part with ink, paint, glue, coating, a foil and other materials is guaranteed, and a better bonding effect is achieved.

Description

technical field [0001] The invention relates to a multi-stage pressurized fluorination treatment method for the surface of plastic parts. Background technique [0002] Plastic parts have easy molding, light weight and other good physical and chemical properties, so they are widely used in industrial fields such as packaging, daily necessities and automobiles. In the prior art, the surface of plastic parts needs to be sprayed with ink, paint, glue, paint, etc. according to different functional requirements (such as printing or improving anti-corrosion and aging resistance, etc.), or add different materials by hot foil process, but plastic parts The relatively inert chemical structure determines its poor adhesion to other materials. In order to improve this shortcoming, it is necessary to carry out surface pretreatment on the surface of plastic parts, change the surface polarity to enhance its surface chemical activity and surface energy, and ensure better adhesion between pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08L23/12C08L23/06C08L69/00C08L77/00
CPCC08J7/126C08J2323/06C08J2323/12C08J2369/00C08J2377/00
Inventor 李清太陈超陈金春
Owner JRB PACKING CO LTD
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