Composite modified attapulgite special for filling paper products and method for preparing same

A technology of attapulgite and modification, applied in the field of non-metallic mineral resource utilization, can solve the problem that the application of attapulgite has not yet been reported, and achieve the effects of reducing papermaking cost, improving evenness, simple preparation process and equipment

Inactive Publication Date: 2010-11-17
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported mineral fibers used as plant fiber substitutes are mainly sepiolite, wollastonite and other mineral composite fibers, and there is no report on the application of attapulgite in this respect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1 - Filled Aluminum Foil Backing Paper

[0013] Select dolomite attapulgite with attapulgite content of 36% and whiteness of 82, press it into 1-2mm thin slices with a twin-screw extruder, dry in a rotary dryer at 180°C until the water content is 5%, and crush to 4.5μm ; Add light calcium carbonate of 4.5 μm and whiteness 92 in the mixer according to the mass ratio of attapulgite at 1:1, and after fully mixing evenly, add octadecyltrimethylammonium chloride cationic surface according to 2.5% of the mass of the mixture Modifier, fully stirred and mixed at 70°C for 10 minutes to obtain compound modified attapulgite with aluminum foil backing paper filler. The compound modified attapulgite is used in aluminum foil backing paper without changing the papermaking process and conditions, and the addition amount is 20%, which can increase the retention rate of filler in paper products by more than 40%, and the tensile strength can be increased by more than 30%. .

Embodiment 2

[0014] Example 2—Fill lunch box paper

[0015] Select dolomite attapulgite ore with attapulgite content of 43% and whiteness of 85, press it into 1-2mm thin slices with a twin-screw extruder, dry at 190°C until the water content is 4%, and pulverize it to 4.5 μm with a jet mill; Add light calcium carbonate of 4.5 μm and whiteness 92 in the mixer according to the mass ratio of attapulgite 1:1.2, after fully mixing evenly, add chitosan solution with a mass percentage concentration of 0.1% according to 2% of the mass of the mixture, at 75 ℃, fully stirred for 20 minutes, and dried to obtain the compound modified attapulgite for lunch box paper filler. The modified attapulgite is used in the production of lunch box paper without changing the papermaking process and conditions. The added amount is 20%. The resulting lunch box paper has outstanding antibacterial properties, and its compressive and flexural strengths are significantly enhanced. , Filler retention increased by 50%. ...

Embodiment 3

[0016] Example 3 - Filling corrugated paper

[0017] Select montmorillonite attapulgite with attapulgite content of 43% and whiteness of 78, press it into 1-2mm thin slices with a twin-screw extruder, dry at 200°C until the water content is <5%, and crush to 4.5μm; Add heavy calcium carbonate of 4.5 μm and whiteness of 92 to the machine according to the mass ratio of attapulgite at 1:1.5, mix well and add modified starch solution with a concentration of 0.5% by mass percentage according to 1.5% of the mass of the mixture, and fully stir at 80°C After drying for 30 minutes, the compound modified attapulgite for corrugated paper product filler is obtained. The compound modified attapulgite is used in the production of corrugated paper without changing the process and conditions of papermaking. The addition amount is 15%, which can reduce the solid content of white water by 5%-10% and increase the tensile strength by 30%-40%. , the ring pressure increases by 2 ring pressure stre...

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Abstract

The invention discloses a modified composite attapulgite clay special for paper wadding and a method for producing the same. The modified composite attapulgite clay is composed of attapulgite clay, light / heavy calcium carbonate, and 1.5-2.5% of surface modifier based on the mass of the mixture, wherein mass ratio of the attapulgite clay to the calcium carbonate is 1:1-1.5. The method comprises: firstly selecting attapulgite clay deposit, in which mass percent of attapulgite clay is more than 30%, secondly, preforming of the attapulgite clay by a twin screw extruder, airing or drying until themass percent of water is less than 5%, and then crushing the preformed attapulgite clay to 4.5 mu m; subsequently, adding the calcium carbonate into a mixer, wherein the thickness of the calcium carbonate is 4.5 mu m, whiteness is more than 85, and the mass ratio is 1-1.1-1.5 based on the attapulgite clay; finally, adding the surface modifier of 1.5-2.5% based on the mass of the mixture and blending the mixtures for 10-30 minutes at 60-80 DEG C. to obtain the modified composite attapulgite clay. Accordingly, the modified composite attapulgite clay of the invention is applicable for paper wadding, which can obviously increase the retention and the intension of the paper articles, as well as better protect the environment.

Description

technical field [0001] The invention relates to a compound modified attapulgite and a preparation method thereof, in particular to a compound modified attapulgite specially used for filling paper products and a preparation method thereof, and belongs to the technical field of utilization of non-metallic mineral resources. Background technique [0002] The use of fillers in the paper industry can not only reduce the manufacturing cost of paper, but also impart special properties such as opacity and printability to paper. [0003] Mineral fibers can interweave with plant fibers to form a network structure of plant fibers and mineral fibers. After the mineral fiber is modified, it can be better combined with the plant fiber to obtain a plant-mineral composite fiber material, which can replace part of the plant fiber pulp for papermaking. The reported mineral fibers used as plant fiber substitutes are mainly sepiolite, wollastonite and other mineral composite fibers, but there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/67
Inventor 陈静金叶玲钱运华
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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