Special low-temperature injection-molded transparent PC (Polycarbonate) material for IMD (In-Mold Decoration) and preparation method therefor

A low-temperature injection molding and transparent technology, applied in the field of IMD special low-temperature injection molding transparent PC material and its preparation, can solve the problems of inability to produce transparent or light-transmitting functional parts for automobile interiors, and high PC injection temperature, and achieve lower injection temperature, The effect of improving flow length ratio and high thermal stability

Inactive Publication Date: 2019-05-07
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a low-temperature injection-molded transparent PC material for IMD and its preparation method, which solves the technical problem that in the existing IMD process, the PC injection temperature is too high, and it is impossible to produce transparent or light-transmitting functional parts for automotive interiors.

Method used

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  • Special low-temperature injection-molded transparent PC (Polycarbonate) material for IMD (In-Mold Decoration) and preparation method therefor
  • Special low-temperature injection-molded transparent PC (Polycarbonate) material for IMD (In-Mold Decoration) and preparation method therefor
  • Special low-temperature injection-molded transparent PC (Polycarbonate) material for IMD (In-Mold Decoration) and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The low-temperature injection-molded transparent PC material dedicated to IMD of this embodiment is made of the following raw materials in parts by weight:

[0035]

[0036] The preparation method of the IMD-specific low-temperature injection-molded transparent PC material of this embodiment comprises the following steps:

[0037] S1. Weigh the raw materials according to the weight of the raw materials, and sequentially add them into a high-speed mixer with a rotating speed of 500rpm / min, mix for 4min, and discharge to obtain a mixture;

[0038] S2. Put the mixture prepared in step S1 into the hopper of the twin-screw extruder, wherein the twin-screw extruder selects a screw combination with strong shear, set the screw speed of the twin-screw extruder to 500r / min, and the main feed 20HZ , the degree of vacuum is -0.06MPa, the temperature is 255°C, after extrusion granulation, the speed of the granulator is 800rpm, and the pellets can be collected.

Embodiment 2

[0040] The low-temperature injection-molded transparent PC material dedicated to IMD of this embodiment is made of the following raw materials in parts by weight:

[0041]

[0042] The preparation method of the IMD-specific low-temperature injection-molded transparent PC material of this embodiment comprises the following steps:

[0043] S1. Weigh the raw materials according to the weight of the raw materials, and sequentially add them to a high-speed mixer with a rotating speed of 500 rpm / min, mix for 4 minutes, and discharge to obtain a mixture;

[0044] S2. Put the mixture prepared in step S1 into the hopper of the twin-screw extruder, wherein the twin-screw extruder selects a screw combination with strong shear, set the screw speed of the twin-screw extruder to 500r / min, and the main feed 20HZ , the degree of vacuum is -0.06MPa, the temperature is 255°C, after extrusion granulation, the speed of the granulator is 850rpm, and the pellets can be collected.

Embodiment 3

[0046] The low-temperature injection-molded transparent PC material dedicated to IMD of this embodiment is made of the following raw materials in parts by weight:

[0047]

[0048] The preparation method of the IMD-specific low-temperature injection-molded transparent PC material of this embodiment comprises the following steps:

[0049] S1. Weigh the raw materials according to the weight of the raw materials, and sequentially add them into a high-speed mixer with a rotating speed of 400rpm / min, mix for 6min, and discharge to obtain a mixture;

[0050] S2, put the mixture prepared in step S1 into the hopper of the twin-screw extruder, wherein the twin-screw extruder selects a screw combination with strong shear, set the screw speed of the twin-screw extruder to 400r / min, and the main feed 25HZ , the degree of vacuum is -0.04MPa, the temperature is 270°C, after extrusion granulation, the speed of the granulator is 700rpm, and the pellets can be collected.

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Abstract

The invention discloses a special low-temperature injection-molded transparent PC (Polycarbonate) material for IMD (In-Mold Decoration) and a preparation method therefor and belongs to the technical field of macromolecular materials. The special low-temperature injection-molded transparent PC material for IMD is prepared from the following raw materials in parts by weight: 70-90 parts of PC resin,5-20 parts of phosphate compounds, 3-8 parts of phthalate, 1-3 parts of thermal stabilizer, 0.5-1 part of antioxidant, 0.5-1 part of lubricant and 0-3 parts of auxiliaries. According to the special low-temperature injection-molded transparent PC material for IMD and the preparation method therefor, through plasticization of the phosphate compounds and the phthalate, the injection molding temperature of the PC material is lowered, and meanwhile, the transparency and rigidity / toughness of the PC material are not affected, so that the prepared alloy material has the characteristics of low injection molding temperature, high material flow length ratio, high transparency, high thermal stability and the like. According to the special low-temperature injection-molded transparent PC material forIMD, the density is 1.18g / cm<3> to 1.20g / cm<3>, the flow length ratio is 150 to 250, the gap impact of a cantilever beam is higher than 50KJ / m<2>, and thus, the special low-temperature injection-molded transparent PC material is extremely applicable to low-temperature injection molding processes of IMD.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a low-temperature injection-molded transparent PC material for IMD and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a polymer whose molecular chain repeating unit is carbonate type. It has high impact strength, high light transmittance, high rigidity, good creep resistance and dimensional stability, heat resistance and dielectric properties. Excellent and other advantages, there are also disadvantages of high injection molding processing temperature. [0003] In the prior art, the IMD (In-Mold Decoration, in-mold decoration technology) process is widely used in the fields of communication electronics, household appliances, and the automotive industry. The surface-hardened transparent film used will choose transparent plastic materials (such as GPPS, Transparent ABS, PMMA, etc.), but when the IMD process is applied to the production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L25/14C08L85/02C08K5/12C08K5/134C08K5/372C08K13/02
Inventor 高波邢道亮文听雷李荣群
Owner ORINKO NEW MATERIAL CO LTD
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