Preparation method of micro-pore foaming polycarbonate reflecting film

A polycarbonate and microcellular foaming technology, which is applied in the field of preparation of microcellular foamed polycarbonate reflective films, can solve the problems of high technical difficulty, high production cost, high processing conditions and the like, and achieves good pore size uniformity. , the effect of high reflectivity

Inactive Publication Date: 2018-03-06
宁波致微新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, its production cost is very expensive, the processing conditions are very demanding, and the technology is difficult, which is not conducive to the promotion of industrialization

Method used

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  • Preparation method of micro-pore foaming polycarbonate reflecting film
  • Preparation method of micro-pore foaming polycarbonate reflecting film
  • Preparation method of micro-pore foaming polycarbonate reflecting film

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Effect test

preparation example Construction

[0020] The preparation method of the microporous foamed polycarbonate reflective film of the present invention comprises step 1, step 2, step 3 and step 4,

[0021] Step 1: Place the polycarbonate material in the pressure vessel A, seal the pressure vessel A, raise the temperature to the infiltration temperature, the infiltration temperature is 100℃~140℃, fill the supercritical fluid to the infiltration pressure, the infiltration pressure is 1~15MPa , and then infiltrate under the infiltration temperature and infiltration pressure, and the infiltration time is 10 to 600 minutes;

[0022] Step 2: The temperature of the pressure vessel B is kept at the saturation temperature, and the saturation temperature is 150 ° C ~ 220 ° C, and then go through the "unloading-taking-installing-closing-filling" procedure, and the "unloading-taking-installing-closing-filling" procedure Complete within 5 minutes, then the pressure vessel B is saturated at the saturation temperature and pressure,...

Embodiment 1

[0075] Place the polycarbonate sheet (Sabic 123R, MFR 17.5g / 10min, size 50cm×100cm×2cm) in the pressure vessel A, and seal the pressure vessel A, raise the temperature to 130°C, and fill it with supercritical carbon dioxide to 12MPa, Then infiltrate for 180min;

[0076] The temperature of pressure vessel B is kept at 167°C, and then undergoes the procedure of "unloading-taking-installing-closing-filling", and the completion time of the procedure of "unloading-taking-installing-closing-filling" is 115s, and then pressure vessel B is saturated Saturated under temperature and saturation pressure, the saturation time is 30 minutes, the specific steps of the "unloading-taking-installing-closing-filling" procedure are: depressurize the pressure vessel A, and take out the soaked polycarbonate sheet from the pressure vessel A , and put it into the pressure vessel B, seal the pressure vessel B, fill it with supercritical carbon dioxide to the saturation pressure, and the saturation pre...

Embodiment 2

[0080] It was the same as Example 1 except that the polycarbonate raw material constituting the polycarbonate sheet in Example 1 was changed (NOVAREX 7022R, MFR: 14 g / 10min).

[0081] Then split to obtain a microporous foamed polycarbonate reflective film with a density of 0.178g / cm 3 , and the internal cell morphology was analyzed by scanning electron microscopy, such as figure 2 As shown, the measured average pore diameter is 22 μm, and the number of cells whose diameter is more than twice the average diameter is 1.4%. The cell uniformity is good, and the calculated cell density is 7.13×10 8 piece / cm 3 , and its reflectivity was measured to be 93.8%.

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PUM

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Abstract

The invention relates to a preparation method of a micro-pore foaming polycarbonate reflecting film. The preparation method comprises the following steps: putting a polycarbonate sheet material into adevice with specific wetting temperature and wetting pressure of specific supercritical fluid and keeping temperature and keeping pressure for specific time; then keeping temperature and keeping pressure for specific time under relatively high saturated temperature and relatively high supercritical fluid saturated pressure; releasing pressure at a specific pressure releasing speed to obtain a polycarbonate micro-pore foaming material; and splitting the polycarbonate micro-pore foaming material to obtain the micro-pore foaming polycarbonate reflecting film. The method is a method which is suitable for industrially producing and efficiently preparing the micro-pore foaming polycarbonate reflecting film.

Description

technical field [0001] The invention belongs to the field of preparation of polymer microporous foaming, and in particular relates to a preparation method of a microporous foaming polycarbonate reflective film. Background technique [0002] Microcellular foaming technology refers to the use of thermoplastic materials as the matrix, through special processing technology, so that the closed micropores with a cell size of 1 micron to tens of microns are densely distributed in the middle of the product. [0003] Facing the wave of global energy saving, the industry has stepped into the field of lighting fixtures, expecting to use low-power, high-efficiency LEDs and cold cathode lamps (CCFL) to replace inefficient fluorescent tubes. Although the development of new light source lamps has great market prospects, due to the structural factors of the light-emitting elements themselves, after the lamps are manufactured, there will be varying degrees of glare and uneven brightness. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L69/00
CPCC08J9/122C08J2203/06C08J2203/08C08J2205/044C08J2369/00
Inventor 李文强周发俊韩鹿伟
Owner 宁波致微新材料科技有限公司
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