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Paper making material, preparation method and paper making method of environment-friendly synthetic paper

A synthetic paper, environmental protection technology, applied in the direction of papermaking, textiles and papermaking, synthetic cellulose fibers, etc., can solve problems such as hindering production and application promotion, affecting printability, recycling difficulties, etc., to achieve industrial production and promotion, improve Compatibility and dispersibility, the effect of solving limitations

Active Publication Date: 2010-06-30
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the common problem is that since the synthetic paper made of these materials has no capillary pores and non-absorbent material, the printability is much worse than that of wood pulp paper, and the plasticity is not great for printing.
Moreover, because the higher content of resin makes it more similar to plastic, it has great limitations in use. It is difficult to recycle paper after use, which will cause corresponding pollution to the environment and lack of real environmental protection.
However, if the content of inorganic mineral powder is increased, the compatibility and dispersion of inorganic mineral powder and matrix resin are poor, which will easily cause surface de-powdering, affect printability, and also affect product stability, tear resistance and durability. Tortuousness, high filling volume, high requirements on equipment and process, huge investment, often hundreds of millions of yuan, product cost is several times higher than ordinary paper, overall cost is higher than traditional wood pulp paper, unable to enhance competitiveness
Therefore, the current synthetic paper is difficult to compete with traditional paper in terms of quality, cost, and environmental protection, which hinders its production and application promotion.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] Raw materials (by total weight, the same below): modified wollastonite fiber 70%, thermoplastic cornstarch 10%, nitrocellulose 5%, polypropylene-maleic anhydride graft copolymer 10%, ethylene / vinyl acetate Copolymer 2%, white oil 3%. Among them, the modified wollastonite fiber is obtained by processing according to the method reported by Li Zhen et al. ; Thermoplastic starch is obtained by processing according to the aforementioned CN1778833A method (hereinafter all the same).

[0037] Put the modified wollastonite fiber into the SHR-300A high-mixer, and stir at 120°C and 900 rpm for 20 minutes to preheat and dehydrate. After the moisture content is ≤10%, add thermoplastic cornstarch and keep stirring for 20 minutes. Minutes, add nitrocellulose and stir for 20 minutes, add white oil and stir for 10 minutes, finally add the mixture of ethylene / vinyl acetate copolymer and polypropylene-maleic anhydride graft copolymer, stir for 8 minutes and discharge.

[0038] The abov...

Embodiment 2

[0041] Raw materials: modified sepiolite fiber 40%, thermoplastic tapioca starch 30%, cellulose acetate 5%, polyethylene-maleic anhydride graft copolymer 20%, mineral oil 3%, titanium dioxide 2%. The modified sepiolite fiber wherein can be by the mode of above-mentioned embodiment 1 or according to Shen Shangyue et al. "Wollastonite surface modification and effect evaluation" ("Mineral Protection and Utilization" 2000, (6): 24-28) It is obtained by processing in the manner reported.

[0042] Stir the modified sepiolite fiber in a high-mixer at 110°C and 600 rpm for 15 minutes to preheat and dehydrate until the water content is ≤10%, then add thermoplastic tapioca starch, keep stirring for 15 minutes, and then add cellulose acetate Stir for 15 minutes, add mineral oil and stir for 10 minutes, finally add polyethylene-maleic anhydride graft copolymer and titanium dioxide, stir for 5 minutes and discharge.

[0043] The above mixture is extruded and granulated by a two-stage scre...

Embodiment 3

[0046] Raw materials: modified gypsum whiskers 50%, thermoplastic corn starch 20%, ethyl cellulose 10%, polypropylene-maleic anhydride graft copolymer 15%, ethylene / vinyl acetate copolymer 3%, oxidized polyethylene wax 2 %. Among them, the modified gypsum whiskers are according to Shi Yubei et al. "The Mineralogical Characteristics of Yunnan Wollastonite and the Application of Mineral Resin Fillers in the Wood-based Panel Industry" ("Forest Industry" 2004, 31(4): 7-10) It is obtained by processing in the manner reported.

[0047] Put the modified gypsum whiskers in a high-speed mixer at 100°C and 300 rpm for 10 minutes to preheat and dehydrate until the water content is ≤10%, add thermoplastic wheat starch, keep stirring for 10 minutes, add ethyl cellulose Stir for 10 minutes, add oxidized polyethylene wax and stir for 5 minutes, finally add the mixture of ethylene / vinyl acetate copolymer and polypropylene-maleic anhydride graft copolymer, stir for 5 minutes and discharge.

...

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Abstract

The invention relates to a paper making material, a preparation method and a paper making method of environment-friendly synthetic paper. The material comprises modified mineral fiber, thermoplastic starch, cellulose derivative, compatilizer, auxiliary components and the like, wherein the average particle diameter of the modified mineral fiber is 5-10 micrometers, the ratio of the length of the modified mineral fiber to the diameter of the modified mineral fiber is 8-15:1, and the modified mineral fiber is treated by fibrosis ultrafine grinding and surface recombination modification; the thermoplastic starch is formed by performing micronization and plasticization modification on norm starch; and the auxiliary components comprise lubricant and colorant. The paper making material is prepared by sequentially mixing the raw material components fully and then extruding and granulating the mixture by a screw extruder at 60-180 DEG C. According to the plastic process mode, the material can be treated by blow molding through a calender or a paper film machine for carrying out two-way stretch to prepare corresponding paper products. The paper making material can overcome the defects of the current synthetic paper and can be widely applied to the fields of commercial printing, publications, office paper, packing and the like, and the processing procedure of making paper by using plastic processing equipment has environmental protection and low cost.

Description

technical field [0001] The present invention relates to a manufacturing material which can be used to manufacture synthetic paper, a preparation method of the material and a papermaking method using the material. Background technique [0002] For a long time, the destruction and pollution of the environment by the paper industry has been recognized, and it is an industry that consumes a lot of wood and energy. The raw materials of ordinary paper are straw pulp, wood pulp, bamboo pulp, hemp fiber, etc., which are plant fibers. It is speculated that for ordinary wood pulp paper, about 4 tons of wood are needed to produce 1 ton of paper, which is equivalent to cutting down 23 large trees. On the one hand, it not only greatly consumes green resources and destroys the natural environment that people rely on for survival, but on the other hand, the cooking, bleaching, washing and other operations in the pulp production process of the paper industry will discharge a large amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/02D21H17/28D21H27/00B29C69/02B29L7/00
Inventor 陈庆邱雄曾军堂刘宏
Owner CHENDU NEW KELI CHEM SCI CO LTD
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