Polyester type resin composition
A technology of resin composition and polyester, applied in the direction of incandescent lamps, electrical components, incandescent lamp parts, etc., can solve the problems of not being suitable for the heating and melting time of the hot runner system, not being able to impart toughness to the lamp holder, and a large amount of black impurities
Inactive Publication Date: 2004-05-19
WIN TECH POLYMER LTD
View PDF2 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] However, these methods are not suitable for molding under severe conditions such as the hot runner system (a system that takes a long time to heat and melt and is temporarily exposed to high temperatures of about 290 to 300°C) used in the molding of lighting components such as lamp sockets.
For example, even if you select a flame retardant that only has a gelation inhibitory effect on resin melting or has high melt stability, it cannot impart the necessary toughness to lamp holders, etc., and a large amount of black impurities will be generated in mass production
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1～5 and comparative example 1～3
[0128] The above-mentioned components were mixed at the ratio shown in Table 1, and melt-kneaded with a twin-screw extruder to prepare a disc-shaped resin composition. Next, using this wafer, a test piece was produced by injection molding, and the above-mentioned various characteristics were evaluated. The results are shown in Table 1.
[0129] As can be seen from the table, the composition of the present invention (Examples 1-5) maintains the required flame retardancy, antistatic property and light discoloration resistance of the round tube lamp holder of the fluorescent lamp, and at the same time, the adhesion amount of black impurities is very small, which is suitable for mass production. The incidence of substandard products has been drastically reduced. In particular, the compositions of Examples 1 to 4 had an elongation of 10% or more in the tensile test and were also excellent in toughness. On the other hand, the compositions of Comparative Examples 1 to 3 had a large...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
Provided is a polyester-based resin composition not only having high flame retardancy and antistatic properties but also inhibiting the formation of a black foreign matter in a molded product even in a severe molding condition using a hot runner system or the like. The polyester-based resin composition is composed of (A) 100pts.wt. polyester-based resin, (B) 5-60pts.wt. halogenated bisphenol-type epoxy resin having sealed terminal epoxy groups and <=8,000 number average molecular weight, (C) 1-20pts.wt. antimony-based flame retardant and (D) 0.1-10pts.wt. antistatic agent. The resin composition may contain (E) a phosphoric acid salt and / or (F) an antioxidant. The resin composition preferably has >=10% tensile elongation based on ISO 527. The resin composition is useful for molding a lighting part (especially holders for a light source such as a cap for a circular pipe of a fluorescent lamp).
Description
technical field [0001] The present invention relates to a polyester-based resin composition suitable for appearance applications such as lighting components, and in particular, suitable for sockets for light sources such as round tube sockets for fluorescent lamps. Background technique [0002] Conventionally, polyester resins excellent in heat resistance, mechanical properties, chemical resistance, and moldability have been used as lighting components. From the viewpoint of securing product safety, lighting components are required to have flame retardancy. [0003] In addition, if dust adheres during the manufacturing and assembling process of lighting components, the reliability and life of the product will be reduced. In addition, final products such as round tube lamp holders for fluorescent lamps, if dust adheres to them during shop display, the commodity value will be damaged. Therefore, it is required that the lighting components also have antistatic properties. Ho...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/42C08L67/00H01K1/46
Inventor 沼田贵善
Owner WIN TECH POLYMER LTD