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Translucent laser weldable thermoplastic compositions and laser-welded products

A composition, thermoplastic resin technology, applied in the field of glass-filled semi-crystalline polymer composition, can solve problems such as difficult to control consistency, low laser transparency, unsatisfactory solution, etc., achieve high welding strength, increase transparency Effect

Active Publication Date: 2018-08-31
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are examples of blends exhibiting specified characteristics relative to laser welding, these solutions remain unsatisfactory - not only due to the material's inherent low laser transparency, but also due to the difficulty in manufacturing / producing the material. Controls the consistency of this property

Method used

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  • Translucent laser weldable thermoplastic compositions and laser-welded products
  • Translucent laser weldable thermoplastic compositions and laser-welded products
  • Translucent laser weldable thermoplastic compositions and laser-welded products

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Experimental program
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Effect test

example

[0147] The materials shown in Table 1 were used in this study.

[0148] Table 1. Materials used.

[0149]

[0150] preparation

[0151] According to the conditions depicted in Table 2, PBT, PC and SPG PET resins were melt blended on a Werner & Pfleider 25mm twin screw extruder in the presence of processing aids, glass fibers, acid quencher. The molten polymer strands were cooled in a water bath and pelletized, dried at 120° C. for 2 h, and then molded into 60 mm×60 mm sheets (thickness: 2.0 mm).

[0152] Table 2. Extrusion and molding processing conditions.

[0153]

[0154] test

[0155] Heat deflection temperature, MVR, and Izod impact values ​​were measured on molded samples according to the methods shown in Table 3.

[0156] Table 3. Test methods.

[0157]

[0158] Transmission and haze measurements were performed on a BYK-Gardner haze-gard dual.

[0159] Near infrared (NIR) transmittance data was measured in the middle (intersection of two diagonals) of a 2...

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Abstract

The invention is directed to a thermoplastic resin composition comprising: from 10 to 80 weight percent of a partially crystalline polyester component selected from the group consisting of terephthalate-derived polyesters, naphthalate-derived polyesters, succinate-derived polyesters, and furanoate-derived polyesters; or combinations thereof; from 1.5 to 40 weight percent of an amorphous high heat copolyester resin component that is produced by polymerizing a monomer mixture comprising a mixture of spiroglycol, ethylene glycol and terephthalic acid and or an ester thereof (SPG PET) and havinga glass transition temperature (Tg) of 85 to 130DEG C; and from 0.01 to 5 weight percent of an antioxidant, mold release agent, stabilizer, or a combination thereof.

Description

technical field [0001] The present invention relates to glass-filled semi-crystalline polymer compositions comprising spirodiol-modified poly(ethylene terephthalate) (SPG PET) copolyester resins. These compositions have increased transparency to NIR laser light without significantly compromising mechanical and thermal properties. Materials with such a high NIR transmission offer processing advantages, especially short cycle times. Due to the improved clarity and transparency of the glass-filled blends, excellent surface aesthetics, depth of color and visual special effects are possible with the present invention. The present invention is also directed to a method for welding a first article comprising a laser-transmissive resin composition as described herein and a laser-absorbing thermoplastic article. The laser welded product of the present invention is obtainable by applying laser radiation to the first article in physical contact with at least a portion of the surface of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08L67/02B29C65/16
CPCC08L67/02C08L69/00C08G63/672C08L2205/025C08L2205/03C08L2201/08C08L2201/10C08K2201/003C08K2201/004C08K13/04C08K7/14B29C65/1616B29C65/1635B29C65/1677B29C66/1122B29C66/71B29C66/712B29C66/73773B29C66/73921C08K5/005C08L2666/18B29K2067/00B29K2067/003B29K2069/00B29K2067/006C08G63/183C08G64/04C08K3/20
Inventor D·D·京巴什H·P·C·范赫尔贝克B·范多梅尔
Owner SABIC GLOBAL TECH BV
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