Method for preparing polyethylene packaging sheet filled with synthetic porous calcium silicate modified powder

A porous calcium silicate and polyethylene packaging technology, which is applied in chemical instruments and methods, fibrous fillers, dyed organosilicon compound treatment, etc., can solve the problems of high crystallization nucleation ability, high adsorption, low thermal conductivity, etc. Achieve the effect of reducing adsorption capacity and increasing fluidity

Inactive Publication Date: 2014-06-18
DATANG INT HIGH ALUMINA COAL R & D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned existing problems, the object of the present invention is to overcome the above-mentioned defects, and provide a preparation method for synthesizing porous calcium silicate modified powder filled polyethylene packaging sheet, which can effectively solve the problem of synthesizing porous calcium silicate powder. Problems such as high friction coefficient, high crystallization nucleation ability, high adsorption and low thermal conductivity, etc., and at the same time obtain the best process parameters for the preparation of synthetic porous calcium silicate modified powder filled polyethylene packaging sheet, in order to meet the technical purpose of the present invention The solution is:

Method used

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  • Method for preparing polyethylene packaging sheet filled with synthetic porous calcium silicate modified powder
  • Method for preparing polyethylene packaging sheet filled with synthetic porous calcium silicate modified powder
  • Method for preparing polyethylene packaging sheet filled with synthetic porous calcium silicate modified powder

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preparation example Construction

[0056] 1. Preparation of Synthetic Porous Calcium Silicate Modified Powder

[0057] A Synthesis of porous calcium silicate powder drying

[0058] Change the molecular formula to CaOSiO 3 ·nH 2 O, the true density is 1.1-1.3g / cm 3 , the bulk density is 0.2-0.4g / cm 3 , the synthetic porous calcium silicate powder with an average particle size of 1-3μm is placed in a high-speed mixer for rotary drying, the line speed of the high-speed mixer is ≥28 m / s, the drying temperature is 120-140°C, and the drying time is 20-180min Finally, a synthetic porous calcium silicate powder with a moisture content lower than 2% is obtained;

[0059] The weakening of the nucleating ability and the improvement of the anti-oxidation performance of B synthetic porous calcium silicate powder

[0060] The synthetic porous calcium silicate powder that the moisture content obtained through A step is lower than 2% is by mass percentage as follows:

[0061]

[0062] Mixing, mixing in a high-speed mi...

Embodiment 1

[0088] 1. Preparation of Synthetic Porous Calcium Silicate Modified Powder

[0089] A Synthesis of porous calcium silicate powder drying

[0090] Change the molecular formula to CaOSiO 3 ·nH 2 O, the true density is 1.1g / cm 3 , the bulk density is 0.2g / cm 3 , the synthetic porous calcium silicate powder with an average particle size of 1 μm was placed in a high-speed mixer for rotary drying. The line speed of the high-speed mixer was 28 m / s, the drying temperature was 120 ° C, and the moisture content was 1.5% after drying for 20 minutes. Synthetic porous calcium silicate powder;

[0091] The weakening of the nucleating ability and the improvement of the anti-oxidation performance of B synthetic porous calcium silicate powder

[0092] The synthetic porous calcium silicate powder that the moisture content rate that obtains through A step is 1.5% is by mass percent as follows:

[0093]

[0094] Mixing, mixing in a high-speed mixer, the line speed of the high-speed mixer...

Embodiment 2

[0119] 1. Preparation of Synthetic Porous Calcium Silicate Modified Powder

[0120] A Synthesis of porous calcium silicate powder drying

[0121] Change the molecular formula to CaOSiO 3 ·nH 2 O, the true density is 1.2g / cm 3 , the bulk density is 0.3g / cm 3 , the synthetic porous calcium silicate powder with an average particle size of 2 μm is placed in a high-speed mixer for rotary drying. The line speed of the high-speed mixer is 30 m / s, the drying temperature is 130 ° C, and the moisture content is 1% after drying for 60 minutes. Synthetic porous calcium silicate powder;

[0122] The weakening of the nucleating ability and the improvement of the anti-oxidation performance of B synthetic porous calcium silicate powder

[0123] The synthetic porous calcium silicate powder with a moisture content of 1% obtained through the A step is in the following mass percentages:

[0124]

[0125] Mixing, mixing in a high-speed mixer, the line speed of the high-speed mixer is 30 m...

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Abstract

The invention relates to a method for preparing a polyethylene packaging sheet filled with synthetic porous calcium silicate modified powder, and belongs to the technical field of processing of a packaging sheet. The preparation method comprises the following steps: selecting synthetic porous calcium silicate powder as a main raw material; and preparing the synthetic porous calcium silicate modified powder after drying, reducing nucleating ability, improving antioxidant activity, modification of silane coupling agent on surface, self-assembly of the surface, and lubricating modification; then preparing the polyethylene packaging sheet filled by the synthetic porous calcium silicate modified powder from the synthetic porous calcium silicate modified powder and polyethylene through production lines of a hot cutting double-order extruder and a sheet molding extruder. The polyethylene packaging sheet filled by the synthetic porous calcium silicate modified powder prepared by the method has the characteristics of being low in density, high in strength, good in heat retaining property and sound insulation, high in adsorptivity and the like. The preparation method disclosed by the invention is simple in process, low in demands on equipment, convenient to operate and control, easy to achieve industrial production, and free of special equipment.

Description

technical field [0001] The invention relates to a method for preparing a synthetic porous calcium silicate modified powder filled polyethylene packaging board, which belongs to the technical field of packaging board processing. Background technique [0002] Polyethylene packaging sheets are widely used in building exterior walls, steel protection, food, shipping and other related fields, showing huge use value and economic value. At present, the common filler materials for polyethylene packaging sheets are inorganic fillers such as calcium carbonate, calcium silicate, silicon dioxide, titanium dioxide and kaolin. These inorganic fillers are usually solid spherical particles with a density of 2.0g / cm 3 Above, the number of mesh is divided into 400 mesh -3000 mesh. Inorganic filler filled polyethylene packaging sheet can not only effectively reduce the cost, but also increase the impact resistance of polyethylene packaging sheet. However, the solid spherical inorganic fille...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/04C08K9/06C08K3/34C09C1/28C09C3/12C09C3/10C09C3/08B29C47/92B29C48/92
CPCB29B7/72B29B7/46B29B7/7461B29B9/06B29B9/12B29C48/397B29C48/625B29C48/875B29C48/92B29C2948/922B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895C08K9/04B29C2948/9258C08K3/34C08K9/06C08K2201/003C09C1/28C09C3/006C09C3/08C09C3/10C09C3/12C08L23/06
Inventor 陈建平孙俊民宋宝祥潘启来陈志军魏晓芬王梦頔
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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