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Process for the production of three-dimensional patterns in plastic mouldings

A technology of three-dimensional patterns and thermoplastic materials, which is applied in the injection molding of polymer molds and the field of polymer molds with three-dimensional patterns, which can solve the problems of affecting the visual impression of the final product and damaging the embossed structure.

Inactive Publication Date: 2016-02-10
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since high temperatures are necessary at least during the final processing step to bond the decorative film to the filling resin, previously prepared embossed structures can be damaged, which can adversely affect the visual impression of the final product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] will have a thickness of approximately 400 µm with 0.5 wt% of AutumnMystery (based on SiO 2 Substrate Flake-shaped effect pigments, particle size 5-50 μm, product from Merck KGaA) and 0.05% by weight of PVTrueBlue A2R (product from Clariant International Ltd.) ABS sheets cut to a size of 100x150 mm and fixed to the injection site by adhesive dots The inner surface of the mold insert of the mold part (injector side) having three-dimensional raised objects as a pattern.

[0078] An injection molding machine of the Kraus-Maffei CX-130-380 type was used. After closing the mold, melt the transparent plastic material (SAN 358N, product from BASFSE) into the cavity remaining in the injection mold between the colored thermoplastic sheet and the surface of the injection mold without the sheet (nozzle side). Injection operation at temperatures from 220 to 260°C and from 450 to 900 bar (4.5x10 7 N / m 2 up to 9x10 7 N / m 2 ) under pressure.

[0079] After the cooling operat...

Embodiment 2

[0081] Repeat embodiment 1, change as follows: adopt polystyrene sheet material, it passes through 1% by weight 305 SolarGold (flaky effect pigments based on mica, particle size 10-60 μm, product from Merck KGaA) pigmented. All other parameters remain unchanged. A plate of plastic material was obtained which had a surface layer on one surface which had a strong golden luster and which had a three-dimensional pattern. The negative image of the three-dimensional pattern appears strongly glossy with a deep gold color, uniform gloss and high depth effect when viewed from the opposite surface of the plastic material sheet.

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Abstract

The present invention relates to a process for the production of three-dimensional patterns in plastic mouldings, in particular to an injection-moulding process for the production of mouldings having a three-dimensional pattern, to the polymeric mouldings produced by means of this process, and to the use thereof, in particular for decorative purposes.

Description

technical field [0001] The present invention relates to a method for producing a three-dimensional pattern in a molding of plastics material, in particular to an injection molding method for the manufacture of a polymeric molding having a three-dimensional pattern on one of its surfaces, to a molding machine with a three-dimensional pattern of this type Polymer motifs, and uses thereof. Background technique [0002] Decorative three-dimensional patterns on articles of plastic material are known and have been used for some time. They give the product a unique appearance that suggests depth and distinguishes it in an advantageous manner from conventional graphics. The matrix or sheet is often embossed or structured on at least one of its surfaces to finally have a three-dimensional pattern. In order to achieve specific optical effects, both the phantom and the sheet are usually combined in multiple layers and embossed into a multilayer structure. Furthermore, it can also be...

Claims

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Application Information

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IPC IPC(8): B29C45/16B29C45/26
CPCB29C45/16B29C45/2602B29C45/1418B29C45/14688B29C2045/14213B29L2031/722Y10T428/24612
Inventor M·舒姆R·林茨迈尔
Owner MERCK PATENT GMBH