Environment-friendly paper and preparation method thereof

An environmentally friendly, paper material technology, applied in paper, papermaking, textiles and papermaking, etc., can solve problems that hinder production and application promotion, specific gravity of finished paper, quantitative, large thickness, rough surface of paper, etc.

Inactive Publication Date: 2010-10-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcite CaCO 3 These natural defects will directly affect its dispersion and compatibility in the polymer matrix, and finally affect the forming process and application performance of the paper, resulting in a larger specific gravity, basis weight, and thickness of the finished paper, which is more inclined to plastic Thin film, no paper texture, and in severe cases, it is easy to cause paper surface roughness and powder removal, which hinders its production and application promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw materials (by total weight, the same below): 65% calcium carbonate fiber with an average diameter of 0.5-1 μm, length / diameter ratio (20-30) / 1, thermoplastic corn starch 10%, mHDPE 20%, sulfonated castor oil 2 %, white oil 3%. The thermoplastic starch wherein is obtained by processing according to the method of CN1778833A (hereinafter all the same).

[0024] Preparation: Preheat and dehydrate the calcium carbonate fiber at 100°C to 120°C. After detecting that the moisture content is ≤1%, send it into the LHY-1 high-speed ribbon mixer, and add sulfonated castor oil, thermoplastic cornstarch, white The oil and mHDPE are stirred and mixed at a high speed, and the feeding interval is 3 to 20 minutes, and then in the internal mixer, the temperature is 100°C to 160°C and the pressure is 10 to 30Mpa, and the mixing is continued for 5 to 20 minutes. And cooled to 30 ℃ ~ 40 ℃ pulverization. (same hereafter)

[0025] The above mixture was extruded and granulated through a ...

Embodiment 2

[0028] Raw material: calcium carbonate fiber 70% (with embodiment 1), thermoplastic tapioca starch 10%, PP 15%, mineral oil 2%, sodium alkylbenzene sulfonate 3%.

[0029] Preparation: Preheat the calcium carbonate fiber at 100°C to 120°C, dehydrate it until the water content is less than or equal to 1%, then send it into a GH-50 high-speed drum mixer, add sodium alkylbenzene sulfonate, thermoplastic tapioca starch, mineral Oil stirring and PP keep high-speed stirring and mixing, and then continue mixing in the internal mixer, and finally discharge, cool and pulverize.

[0030] Extrude the above mixture through the T-die of a twin-screw reactive extruder and send it to the aforementioned SY4S-Φ230×630 four-roll calendering unit, select the roll temperature from 150°C to 180°C, and the roll speed from 42 to 65 / m·min -1 After vertical and horizontal bidirectional stretching and cooling forming, it can be rolled directly to obtain environmentally friendly (stone) paper with a thic...

Embodiment 3

[0032] Raw material: calcium carbonate fiber (same as embodiment 1) 85%, thermoplastic sweet potato starch 3%, PP 10%, oxidized polyethylene wax 1%, polydimethylsilane 1%.

[0033] Preparation: Preheat the calcium carbonate fiber at 100°C to 120°C, dehydrate it to a moisture content of ≤1%, and then send it into the SHR-30A high-speed mixer, add polydimethylsilane, thermoplastic sweet potato starch, and oxidized polyethylene wax in sequence Stir and mix with PP at high speed, then continue mixing in the internal mixer, and finally discharge, cool, and pulverize.

[0034] According to the method of Example 2, the above mixture is extruded through the T-die of a twin-screw reaction extruder, and then sent to a four-roller calendering unit for calendering and bidirectional stretching in both directions and directions to process it into an environmentally friendly ( stone) paper.

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Abstract

The invention provides environment-friendly paper and a preparation method thereof. The environment-friendly paper comprises the following components by weight percent: 65-85% of calcium carbonate fibers, 3-10% of thermoplastic starch, 10-20% of polyolefin resins and 2-5% of auxiliary components, wherein the calcium carbonate fibers are needle-like single-crystal fiber materials with average diameter of 0.5-1mu m and length diameter ratio being not less than 20/1; the thermoplastic starch is the micronized, plasticized and modified starch material; the polyolefin resins are polyethylene or polypropylene materials with melt index being 5-30; and the auxiliary components at least comprise surfactants with contents being not less than 1% and lubricants with contents being not less than 1%. The environment-friendly paper has the characteristics of low ration, little proportion and stable and uniform size, has good ink absorbency and printing adaptability, excellent performance indexes, such as whiteness, opacity, smoothness and tensile index and good texture and processability and can realize thermoplastic process. The environment-friendly paper accords with the present national development policy of the low carbon industry and has broad market prospect.

Description

technical field [0001] The present invention relates to an environment-friendly paper called "stone paper" and a related preparation method. Background technique [0002] In order to solve the problem of massive consumption of wood resources as paper raw materials, the composite environmental protection material paper (commonly known as environmental protection (stone) paper) composed of inorganic mineral powder particles and polyolefin polymer materials as the main raw materials is currently being continuously researched and developed. hotspots. The production process of this kind of paper is mainly based on calcium carbonate and polyolefin resin, which can not only solve the problem of raw materials, but more importantly, these two raw materials are non-polluting and easy to obtain, without deforestation, and there is no pollution in the manufacturing process , to achieve the purpose of protecting the environment. [0003] Among the currently published patents, the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/36D21H17/28D21H17/35
Inventor 陈庆邱雄刘宏
Owner CHENDU NEW KELI CHEM SCI CO LTD
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