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Toy building element made of a polymeric pet material

A technology of toy building elements, polymer materials, applied in the field of manufacturing such toy building elements, capable of solving problems such as unsatisfactory stability and impact strength

Active Publication Date: 2020-07-14
LEGO AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, amorphous PET tends to crystallize during heat treatment (annealing) and the resulting material is brittle
[0006] Furthermore, the known properties of injection molded PET objects are not acceptable from a technical or commercial point of view, since they exhibit poor dimensional stability and unsatisfactory impact strength

Method used

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  • Toy building element made of a polymeric pet material
  • Toy building element made of a polymeric pet material
  • Toy building element made of a polymeric pet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Example 1. Using PET with Paraloid TM EXL-2314 modified

[0137] Bottle grade PET CB-602 (supplied by Far Eastern New Century (FENC)) with an IV of 0.80 dl / g was dried at 150 degrees Celsius to a moisture content of 50-100 ppm. When the dried PET material is ambient cooled to below 50 degrees Celsius, the PET is mixed with the impact modifier Paraloid TM EXM-2314 (acrylic copolymer from Dow Chemical Company) was dry blended in the amounts mentioned in the table below. The blends were processed directly via injection molding (Arburg, Allrounder 470 E 1000-400, 30 mm screw, Germany) or via extrusion (twin screw, Labtech Engineering Company Ltd, Thailand) followed by injection molding.

[0138]

[0139] The injection molding parameters were as follows:

[0140] Melt temperature: 295 degrees Celsius

[0141] Hot runner temperature: 300 degrees Celsius

[0142] Mold temperature: 20 degrees Celsius

[0143] The extrusion processing parameters are as follows:

[0144...

Embodiment 2

[0151] Example 2. Substituting PET and recycled PET (rPET) with ethylene-glycidyl methacrylate copolymer (E-GMA) AX8700 and AX8900 modification

[0152] Bottle grade PET CB-602 (supplied by Far Eastern New Century (FENC)) with an IV of 0.80 dl / g and commercial grade post-consumer rPET CB-602R (supplied by FENC) with an IV of 0.82 dl / g were tested at 150 Dry to a moisture content of 50-100ppm at °C. When the dried PET samples were ambient cooled to below 50 degrees Celsius, the samples were mixed with AX8700 (supplied by Arkema) which is a reactive random terpolymer of ethylene, butyl acrylate and glycidyl methacrylate (epoxy functional)), or AX8900 (supplied by Arkema), which is a reactive random terpolymer (epoxy functional) of ethylene, methyl acrylate and glycidyl methacrylate, was dry blended in the amounts mentioned in the table below and Processed by injection molding (Arburg, Allrounder 470E 1000-400, 30 mm screw, Germany).

[0153] test PET grade ...

Embodiment 3

[0163] Example 3. Modification of different PET grades with various impact modifiers

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Abstract

The present invention relates to a toy building element made of a polymeric poly(ethylene terephthalate) (PET) material and manufactured by injection moulding of a resin comprising PET polyester. Thepresent invention also relates to a method for the manufacture of such a toy building element.

Description

technical field [0001] The present invention relates to toy building elements made of poly(ethylene terephthalate) (PET) polymer material and manufactured by injection molding of a resin comprising PET polyester. The invention also relates to a method for producing such a toy building element. Background technique [0002] Poly(ethylene terephthalate), often abbreviated PET or PETE, is a commonly used thermoplastic polymer resin. It exists as an amorphous (transparent) state and in a semi-crystalline state. Amorphous PET materials appear as transparent materials, while semi-crystalline PET materials may appear transparent or opaque and white depending on their crystal structure and the type and amount of additives. [0003] Today, PET is widely used in the manufacture of containers for food, water and soda, and soft drinks, due to its excellent combination of mechanical and gas barrier properties. Transparent water bottles are manufactured by blow molding of amorphous PET...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A63H33/04A63H33/08
CPCA63H33/086A63H9/00B29C45/0001C08L67/02C08L2207/20B29K2067/003B29L2031/529
Inventor R.米凯尔森E.安德森
Owner LEGO AS
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