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Rich mineral paper preparation method

A technology of stone paper and masterbatch, applied in the field of papermaking, can solve the problems of poor fluidity and uniformity of stone paper melt, increase the specific gravity of stone paper, affect the overall quality of stone paper, etc. good thermal effect

Inactive Publication Date: 2012-08-01
深圳市石头记环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these fillers and processing aids are in the form of solid powder, they will not only increase the specific gravity of stone paper, but also have poor fluidity and uniformity of the melt of stone paper, which will affect the overall quality of stone paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 20 parts by weight of PE, 70 parts by weight of CaCO 3 , and 7 parts by weight of talcum powder were evenly mixed to make a stone paper masterbatch. The above-mentioned stone paper master batch is sent into the barrel of the screw extruder, and 5‰ carbon dioxide gas whose weight is the weight of the stone paper master batch is fed into simultaneously. In the barrel of the screw extruder, the carbon dioxide gas produces microbubbles with a diameter of 2-4um, which are fully mixed with the stone paper masterbatch and carbon dioxide gas, and then foamed. High-temperature foaming and low-temperature foaming are carried out alternately during screw extrusion, the high-temperature foaming temperature is 300°C, the low-temperature foaming temperature is 160°C, and the screw extruder speed is 70r / min. In this way, high-temperature foaming and low-temperature foaming are carried out alternately until the foaming is complete. Finally, the fully foamed material is sent to a cale...

Embodiment 2

[0030] 25 parts by weight of PE, 50 parts by weight of CaCO 3 , 25 parts by weight of talcum powder are mixed evenly to make a stone paper masterbatch. The above-mentioned stone paper masterbatch is sent into the barrel of the screw extruder, and the nitrogen gas with a weight of 1% of the weight of the stone paper masterbatch is fed in at the same time. In the barrel of the screw extruder, nitrogen produces microbubbles with a diameter of 2-4um, which are fully mixed with the stone paper masterbatch and nitrogen, and then foamed. High-temperature foaming and low-temperature foaming are carried out alternately during screw extrusion, the high-temperature foaming temperature is 200°C, the low-temperature foaming temperature is 130°C, and the screw extruder speed is 100r / min. In this way, high-temperature foaming and low-temperature foaming are carried out alternately until the foaming is complete. Finally, the fully foamed material is sent to a calender for calendering to pro...

Embodiment 3

[0033] 22 parts by weight of PE, 60 parts by weight of CaCO 3 1. 20 parts by weight of talcum powder are mixed evenly to make a stone paper masterbatch. The above-mentioned stone paper masterbatch is sent into the barrel of the screw extruder, and the carbon dioxide gas with a weight of 8‰ of the weight of the stone paper masterbatch is fed in at the same time. In the barrel of the screw extruder, carbon dioxide gas produces microbubbles with a diameter of 2-4um, which are fully mixed with the stone paper masterbatch and ultrafine gas foaming agent, and then foamed. High-temperature foaming and low-temperature foaming are carried out alternately during screw extrusion, the high-temperature foaming temperature is 250°C, the low-temperature foaming temperature is 140°C, and the screw extruder speed is 90r / min. In this way, high-temperature foaming and low-temperature foaming are carried out alternately until the foaming is complete. Finally, the fully foamed material is sent t...

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PUM

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Abstract

The invention discloses a rich mineral paper preparation method, which comprises the following steps of: A) evenly mixing rich mineral paper master batch; B) feeding the evenly mixed rich mineral paper master batch into a charging barrel of a screw extruder, adding an ultramicro gas foaming agent with weight being 0.5-1 percent of the weight of the rich mineral paper master batch into the charging barrel, evenly mixing the rich mineral paper master batch and the ultramicro gas foaming agent and foaming, wherein the ultramicro gas foaming agent is inert gas; and C) feeding the foamed materials into a calender to produce rich mineral paper products. By evenly distributing the ultramicro inert gas with tiny size into the rich mineral paper under conditions of proper temperature and screw mixing reinforcement, the gas becomes a filling material of the rich mineral paper, the specific weight of the rich mineral paper is greatly reduced, the uniformity and the fluidity of the melt of the rich mineral paper are improved at the same time and the overall quality of the rich mineral paper is further improved.

Description

[0001] technical field [0002] The invention relates to the technical field of papermaking, in particular to a preparation method of stone paper. [0003] Background technique [0004] Paper is one of the four great inventions of China. Since ancient times, wood and other plant fibers have been used in papermaking. The raw material wood required by traditional paper is increasingly scarce with the implementation of national forest protection policies. The three wastes produced in the traditional paper production process have seriously polluted the environment. Traditional paper is not resistant to moisture, Corrosion, poor dimensional stability and various physical and mechanical properties. Many special requirements can no longer be met. [0005] In the 1950s, environmentally friendly synthetic paper produced by blown film and cast methods, made of plastic, calcium carbonate and various additives, has appeared. Its characteristics are that its physical and mechanical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B3/22C04B26/04C04B14/28
Inventor 夏丽蓉夏开邦王德成陈锦泉龚天波
Owner 深圳市石头记环保科技有限公司
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