Preparation process of polycarbonate foamed sheet and product of preparation process

A polycarbonate and foam sheet technology, applied in the field of plastic foam materials, can solve the problems of high pressure and high equipment requirements, and achieve the effect of reducing pressure, low equipment requirements, and reducing safety hazards

Inactive Publication Date: 2020-02-07
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foaming process is also a rapid depressurization method, which requires high pressure and requires high equipment

Method used

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  • Preparation process of polycarbonate foamed sheet and product of preparation process
  • Preparation process of polycarbonate foamed sheet and product of preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Put a PC sheet with a thickness of 0.5mm into the autoclave, and pass it into a high-pressure CO with a pressure of 3MPa. 2 fluid, the saturation temperature is 25°C, and the saturation time is 1h to obtain a saturated PC sheet. After the PC sheet was placed in the atmosphere for 5 seconds, the PC sheet was foamed in an air blast oven at a temperature of 170°C for 35 seconds to obtain a PC microfoamed sheet.

[0046] The prepared PC micro-foamed sheet has a smooth and smooth appearance structure, and the quenched section of the PC micro-foamed sheet sample is analyzed by scanning electron microscope, as shown in figure 1 As shown, the cell size of the PC microfoamed sheet is 10-30 μm, the cell size distribution is uniform, and the density is 0.55 g / cm 3 .

Embodiment 2

[0048] In this embodiment, except that the thickness of the PC sheet is 3mm, the saturated PC sheet is placed in the atmosphere for 2h before foaming, and other conditions are the same as in Example 1, and the cell size of the prepared PC microfoamed sheet is 10~30μm, the cell size distribution is uniform, and its density is 0.80g / cm 3 .

Embodiment 3

[0050] In this example, except that the saturation pressure is changed to 2.0MPa, other conditions are the same as in Example 1. The cell size of the prepared PC microfoam sheet is 20-40 μm, the cell size distribution is uniform, and its density is 0.65g / cm 3 .

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Abstract

The invention discloses a preparation process of a polycarbonate foamed sheet. The preparation process comprises the following steps: putting a polycarbonate-containing sheet into a high-pressure fluid until saturation, relieving the pressure, and taking out the sheet so as to obtain a saturated sheet, wherein the pressure of the high-pressure fluid is 1.0-6.0MPa; and putting the prepared saturated sheet into a thermal medium, and performing foaming so as to obtain the polycarbonate foamed sheet, wherein the temperature of the thermal medium is 145-210 DEG C; and the foaming time is 5-60 seconds. The preparation process is mild in reaction condition, environment-friendly and short in foaming time, and the prepared polycarbonate foamed sheet is light in material, has a smooth surface, has apore size of 10-50 [mu]m and is uniform in pore size distribution.

Description

technical field [0001] The invention relates to the technical field of plastic foam materials, in particular to a preparation process of polycarbonate foam sheets and products thereof. Background technique [0002] Polycarbonate resin (PC) is a kind of thermoplastic engineering plastic with excellent comprehensive properties. It has good impact resistance and dimensional stability, low water absorption, odorless, non-toxic, weak acid and alkali resistance, and excellent dielectric properties. It has good mechanical properties in normal use temperature. Due to its excellent comprehensive properties, PC resin has become a general-purpose engineering plastic that has been used rapidly in recent years. [0003] Polymer foam materials have attracted widespread attention due to their light weight, sound insulation, and heat insulation. After PC is prepared into foam materials, it can reduce the cost of use, improve its toughness, and prolong the fatigue life. Because PC foam mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L69/00C08L33/12C08L67/02
CPCC08J9/122C08J2203/06C08J2369/00C08J2433/12C08J2467/02
Inventor 任倩郑文革翟文涛沈斌吴飞庞永艳李蝶郑皓
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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