Preparation method of black flame-retardant PBT composite material capable of being welded by laser

A technology of laser welding and composite materials, which is applied in the field of polymer materials, can solve the problems of difficult laser welding of black PBT, achieve excellent laser welding ability, avoid strong absorption, and have good compatibility

Active Publication Date: 2021-05-14
上海日之升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that black PBT in the prior art is almost difficult to be welded by laser, and provides a preparation of black flame-retardant PBT composite material that can be laser welded method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of laser weldable black flame-retardant PBT composite material, specifically as follows:

[0040] (1) Preparation of raw materials;

[0041] In terms of parts by mass, 70 parts of PBT TH6100 resin, 8 parts of flame retardant (di(phenoxy) polyphosphazene) (SPB100) and 0.3 parts of black powder were mixed for 2 minutes in a high-speed mixer, and the obtained mixture was used as raw material I;

[0042] The black powder is compounded by perylene-based red toner, instaline-based blue toner and isoindoline-based yellow toner with a mass ratio of 1:0.6:0.9;

[0043] In terms of parts by mass, 10 parts of PBT KH2083 resin and 0.2 parts of N-butylpiguanic acid potassium salt were mixed for 2 minutes in a high-speed mixer, and the obtained mixture was raw material II;

[0044] (2) Add raw material I to the feeding port on the main side of the twin-screw extruder, add raw material II to the feeding port on the 4th stage of the twin-screw extruder, extrude a...

Embodiment 2

[0049] A preparation method of laser weldable black flame-retardant PBT composite material, specifically as follows:

[0050] (1) Preparation of raw materials;

[0051] In terms of parts by mass, 72 parts of PBT TH6100 resin, 8 parts of flame retardant (di(phenoxy) polyphosphazene) (SPB100) and 0.5 parts of black powder were mixed for 2 minutes in a high-speed mixer, and the obtained mixture was used as the raw material I;

[0052] The black powder is compounded by perylene-based red toner, instaline-based blue toner and isoindoline-based yellow toner with a mass ratio of 1:0.6:1;

[0053] In terms of parts by mass, 12 parts of PBT KH2083 resin and 0.5 part of N-butylpiguanic acid potassium salt were mixed for 2 minutes in a high-speed mixer, and the obtained mixture was raw material II;

[0054] (2) Add raw material I to the feeding port on the main side of the twin-screw extruder, add raw material II to the feeding port on the 4th stage of the twin-screw extruder, extrude ...

Embodiment 3

[0059] A preparation method of laser weldable black flame-retardant PBT composite material, specifically as follows:

[0060] (1) Preparation of raw materials;

[0061] In terms of parts by mass, 75 parts of PBT TH6100 resin, 8 parts of flame retardant (di(phenoxy) polyphosphazene) (SPB100) and 0.7 parts of black powder were mixed for 3 minutes in a high-speed mixer, and the obtained mixture was used as the raw material I;

[0062] The black powder is compounded by perylene-based red toner, instaline-based blue toner and isoindoline-based yellow toner with a mass ratio of 1:0.6:1.1;

[0063] In terms of parts by mass, 14 parts of PBT KH2083 resin and 1 part of N-butylpiguanic acid potassium salt were mixed for 3 minutes in a high-speed mixer, and the obtained mixture was raw material II;

[0064] (2) Add raw material I to the feeding port on the main side of the twin-screw extruder, add raw material II to the feeding port on the 4th stage of the twin-screw extruder, extrude ...

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PUM

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Abstract

The invention relates to a preparation method of a black flame-retardant PBT composite material capable of being welded by laser. The preparation method comprises the following steps: adding a raw material I into a main side feeding port of a double-screw extruder, adding a raw material II into a fourth section side feeding port of the double-screw extruder, extruding and granulating, controlling the rotating speed of a screw machine of the double-screw extruder to be 180-600 revolutions per minute and the extruding temperature of the double screws to be 235-275 DEG C, and preparing the black flame-retardant PBT composite material capable of being welded by laser; the length-diameter ratio of the twin-screw extruder is 40: 1; the raw material I is a mixture of 70-90 parts by mass of PBT resin A, 8-10 parts by mass of a flame retardant and 0.3-1.5 parts by mass of black powder, and the raw material II is a mixture of 10-20 parts by mass of PBT resin B and 0.2-3 parts by mass of potassium N-butylpiromate; the prepared black flame-retardant PBT composite material capable of being welded by laser has excellent laser welding capacity and good temperature resistance, is halogen-free and flame-retardant, meets the requirements of ROHS and Reach regulations, and can be used for producing black parts with flame-retardant requirements.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a preparation method of a laser-weldable black flame-retardant PBT composite material. Background technique [0002] Plastic laser welding is to clamp the plastic parts to be welded together, and then direct a beam of laser light in the short-wave infrared region to the part to be bonded. The laser beam passes through the upper material and is then absorbed by the lower material. The absorbed laser energy makes the lower material The temperature rises, melting the upper and lower plastics, thereby completing the weld. The technology of bonding thermoplastic sheets, films or molded parts together by melting the contact surfaces of plastics with the help of heat generated by a laser beam. The advantages of laser welding applied to the welding of plastic parts include: precise and firm welding; airtight and watertight seal, less resin degradation and less debris generated d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L85/02C08K5/00C08K5/3462C08K5/3465C08K5/01C08K5/3417B29B9/06
CPCC08L67/02B29B9/06C08L2201/02C08L2205/025C08L2201/22C08L2201/08C08L85/02C08K5/00C08K5/3462C08K5/3465C08K5/01C08K5/3417
Inventor 王尹杰梁伟成陈东张浩陈晓东
Owner 上海日之升科技有限公司
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