Preparation method of highly filled polyethylene synthetic paper

A technology of high-density polyethylene and synthetic paper, which is applied in the field of preparation of high-fill polyethylene synthetic paper, and can solve the problems of reducing sheet density and increasing porosity

Inactive Publication Date: 2011-10-19
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this temperature, water evaporates, producing a large number of micropores in the sheet, which will expand during the stretching process of the sheet, resulting in larger pores, thereby increasing the porosity in the sheet, further Reduced sheet density

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 26kg of high-density polyethylene with a hot melt flow index MFI of 0.3, 74kg of 600 mesh heavy calcium carbonate, 1.0kg of anhydrous calcium chloride, 0.5kg of sodium dodecylbenzenesulfonate, and 0.1kg of antioxidant 1076 were added to the In the internal mixer, when the temperature reaches 180°C after banburying, stop banburying; send the mixed material into the extruder, control the extrusion temperature at 200°C, and send the extruded melt through the T-shaped die. Put it into the calender, and calender it into a sheet at a temperature of 150 ° C. The thickness of the sheet is 190 μm and the width is 800 mm; the sheet coming out of the calender is cooled to 30 ° C with air with a relative humidity of 50%; The sheet is fed into a multi-roller stretching machine. In the stretching machine, the sheet is preheated to 124°C by oil heating rollers, and stretched by 4 sets of stretching rollers. The stretching ratio is 3.1, and the obtained synthetic paper has a density of ...

Embodiment 2

[0017] 20kg of high-density polyethylene with a hot melt flow index MFI of 0.8, 80kg of 1200 mesh heavy calcium carbonate, 1.2kg of anhydrous calcium chloride, 0.2kg of sodium dodecylbenzenesulfonate, and 0.5kg of antioxidant 1076 were added to the In the internal mixer, when the temperature reaches 175°C after internal mixing, stop internal mixing; send the material after internal mixing into the extruder, control the extrusion temperature at 200°C, and send the extruded melt through a T-shaped die. Put it into the calender, and calender it into a sheet at a temperature of 155 ° C. The thickness of the sheet is 180 μm and the width is 800 mm; the sheet coming out of the calender is cooled to 45 ° C with air with a relative humidity of 100%; The material is fed into the multi-roller stretching machine. In the stretching machine, the sheet is preheated to 128°C by oil heating rollers, and stretched by 5 sets of stretching rollers. The stretching ratio is 3.5, and the obtained sy...

Embodiment 3

[0019] 30kg of high-density polyethylene with a hot melt flow index MFI of 0.08, 70kg of 800 mesh heavy calcium carbonate, 1.5kg of anhydrous calcium chloride, 0.4kg of sodium dodecylbenzenesulfonate, and 0.4kg of antioxidant 1076 were added to the In the internal mixer, when the temperature reaches 150°C after banburying, stop banburying; send the mixed material into the extruder, control the extrusion temperature at 200°C, and send the extruded melt through the T-shaped die. Put it into the calender, and calender it into a sheet at a temperature of 150 ° C. The thickness of the sheet is 140 μm and the width is 800 mm; the sheet coming out of the calender is cooled to 50 ° C with air with a relative humidity of 90%; The sheet is fed into a multi-roller stretching machine. In the stretching machine, the sheet is preheated to 120°C by oil heating rollers, and stretched by two sets of stretching rollers. The stretching ratio is 2.0, and the obtained synthetic paper has a density ...

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Abstract

The invention relates to a preparation method of highly filled polyethylene synthetic paper. The preparation method is characterized in that: high density polyethylene, heavy calcium carbonate, waterless calcium chloride, sodium dodecyl benzene sulfonate and an antioxidant 1076 are added to a banbury mixer, and a temperature reaches 150 to 180 DEG C through banburying; materials after banburying are sent to an extruder, and melts from the extruder are sent to a calender by a T-shaped die head and then calendered into sheets at the temperature of 140 to 160 DEG C; the sheets from the calender are cooled to below 50 DEG C by air with a relative humidity of 50 % to 100%; and the sheets are sent to a multi-roller stretcher, preheated in the stretcher to 110 to 130 DEG C, and stretched by group 2 to 5 stretching rollers to obtain the needed synthetic paper. The purity of the highly filled polyethylene synthetic paper prepared through the method provided by the present invention is 0.9 to 1.5 g/cm<3>.

Description

technical field [0001] The invention relates to a preparation method of highly filled polyethylene synthetic paper. Background technique [0002] Synthetic paper was once known as chemical film paper, polymer paper, plastic paper, etc. It uses thermoplastic polymers (such as polyethylene, polypropylene, polystyrene) and inorganic particles as raw materials, and is processed through different production equipment and processing. Some people say that synthetic paper is the product of the cooperation between the paper industry and the plastics industry. [0003] Due to the dwindling forest resources in today's world (especially my country), the demand for paper raw materials has become a new problem. Synthetic paper can not only solve the problem of raw materials, but more importantly, the raw materials are non-polluting, and the waste generated during the manufacturing process can be recycled. Environmentally friendly synthetic paper has the characteristics of low cost, exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/02C08K3/26C08K3/24C08K5/42B29C69/00B29C43/58B29C43/24B29C55/02
Inventor 夏浙安陈建定王彦华高民强孙景权
Owner EAST CHINA UNIV OF SCI & TECH
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