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Polyester molding composition and preparation method and application thereof

A technology of molding composition and polyester, which is applied in the field of polyester resin composition, can solve problems such as the influence of the binding force of the bracket material and the metal strip on the service life of the lamp bead airtight LED lamp, and meet the requirements of Effect of airtightness requirements

Inactive Publication Date: 2019-05-14
KINGFA SCI & TECH CO LTD +1
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  • Description
  • Claims
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Problems solved by technology

[0011] Although the above patent documents can improve the light and heat aging properties of polyester materials and have good reflectivity and packaging effect, they do not mention the bonding force between the bracket material and the metal strip in the LED reflective bracket and its airtightness to the lamp bead And the influence of LED lamp service life

Method used

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  • Polyester molding composition and preparation method and application thereof

Examples

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Embodiment and

[0069] Embodiment and comparative example:

[0070] According to the parts by weight in Table 1, various PCT resins, white pigments, reinforcing materials, sulfur-containing compounds D1, and sulfur-containing compounds D2 were weighed respectively, and various PCT resins, white pigments, sulfur-containing compounds D1, and sulfur-containing compounds D2 were weighed respectively. Mix in a high mixer, add the mixture to the twin-screw extruder, feed the reinforcing material in the 4th to 9th section of the extruder, and use a weight loss scale to control the feeding, and the temperature in each section of the extruder is 270 °C in the first section. , 280°C in zone 2-4, 290°C in zone 5-7, 280°C in zone 8-9, and 270°C in the machine head, melt blending, extrusion and granulation to obtain a polyester molding composition.

[0071] Table 1. The specific composition and test performance results (parts by weight) of each composition in Examples 1-8 and Comparative Examples 1-5

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Abstract

The invention discloses a polyester molding composition. The polyester molding composition includes the following components of 50 to 80 parts of PCT resin, 10 to 30 parts of white pigment, and 10 to30 parts of reinforcement material and / or filler; further included are sulfur-containing compounds that conform to the following chemical formulas, wherein R1 is an alkyl group or a functional groupcontaining an ester group, R2 is an alkyl group, and X is 0-20; based on the total weight of the polyester molding composition, the sulfur content of the polyester molding composition is 50 to 2000 parts per million. The preparation method of the polyester molding composition includes the steps of mixing polyester resin, white pigment, and the sulfur-containing compounds in a high mixing machine according to the ratio, adding the mixture and reinforcement material and / or filler to a twin-screw extruder for melt blending, and conducting extrusion and granulation to obtain the polyester moldingcomposition. The above-mentioned polyester molding composition has the advantages of strong adhesion to metal strips, good air tightness, reflectivity, and light and heat aging resistance.

Description

technical field [0001] The invention relates to a polyester resin composition, in particular to a polyester molding composition which can be used for LED reflectors. Background technique [0002] As a new type of industry, LED has a wide range of applications, mainly including LED display and lighting, such as indoor lighting, street lights, traffic signals, mobile phone keyboards, digital cameras, large-size LCD TVs, laptop display screens and other display screens. [0003] The SMD type LED reflective bracket is to put the punched and electroplated metal strip into the injection mold, and then inject the LED reflective bracket material on the metal strip through the injection molding machine, so that the LED reflective bracket material and the metal strip Made into LED functional parts with reflective cavity that can be SMT welded. After solid crystal, wire bonding, and packaging, the light emitted by the LED chip is reflected at a certain angle to reduce light loss, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/06C08K9/06C08K3/22C08K7/14C08K3/36C08K5/372F21V7/24C08G63/199F21Y115/10
Inventor 杨汇鑫姜苏俊麦杰鸿蒋智强阎昆李闻达王鹏
Owner KINGFA SCI & TECH CO LTD
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