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A kind of non-wood natural color paste food packaging paper and its preparation method

A technology of food packaging paper and natural color paste, which is applied in the field of paper manufacturing, can solve the problems of lack of safe and environmentally friendly non-wood natural color paste food packaging paper preparation methods, and achieve the effects of maintaining natural color, reducing beating degree, and increasing water filtration capacity

Active Publication Date: 2019-07-19
ANHUI GEYI CYCLIC ECONOMY IND PARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is a lack of a safe and environmentally friendly non-wood-based natural color paste food packaging paper and its preparation method

Method used

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  • A kind of non-wood natural color paste food packaging paper and its preparation method
  • A kind of non-wood natural color paste food packaging paper and its preparation method

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Embodiment 1

[0031] The unbleached straw pulp and unbleached bamboo pulp involved in the present invention are the pulps disclosed in the Chinese patent application with the application number CN201610179306.7 and the name "non-wood pulp" submitted by the applicant on March 25, 2016. The feature is that the collected wheat straw and bamboo raw materials are pretreated separately, and then sent to the primary separation device through the conveying equipment, steamed with 0.6MPa-3.0MPa steam for 1min-5min, after cooking, multi-stage cleaning is carried out, and then solid-liquid Separation to obtain hemicellulose liquid and solid matter; adding alkali solution to the solid matter, cooking at 90°C-130°C for 0.5h-1.5h, performing a second solid-liquid separation after cooking to obtain unbleached pulp (unbleached pulp) Straw pulp and unbleached bamboo pulp). The K value of the unbleached pulp is less than 5.5, the degree of knocking is 20-30°SR, the wet weight is 2-3.5g, the whiteness is less...

Embodiment 2

[0044] The difference between embodiment 2 and embodiment 1 is:

[0045] The collected wheat straw and bamboo raw materials are pretreated separately, and then sent to the first-stage separation device through the conveying equipment, steamed with 2.5MPa steam for 3min, after cooking, multi-stage cleaning is carried out, and then solid-liquid separation is carried out to obtain hemicellulose liquid and Solid matter: add alkali solution to the solid matter, cook at 120° C. for 1 hour, and perform solid-liquid separation for the second time after cooking to obtain unbleached pulp (unbleached straw pulp and unbleached bamboo pulp). The K value of the unbleached pulp is less than 5.2, the beating degree is 25°SR, the wet weight is 3.2g, the whiteness is less than 42°, the pH value is 8.5, and the cellulose content based on the total weight of solids is 96%.

[0046] The preparation steps of non-wood natural color paste food packaging paper are as follows:

[0047] In step (1), th...

Embodiment 3

[0056] The difference between embodiment 3 and embodiment 1 is:

[0057] A kind of non-wood type natural color paste food wrapping paper of the present invention, the slurry of described non-wood type natural color paste food wrapping paper is made by unbleached grass pulp and unbleached bamboo pulp, wherein the quantification of said wrapping paper is 65g / m 2 , the content of synthetic papermaking auxiliary agent is 2.5% of the dry pulp.

[0058] Described slurry is made up of the following components of weight percent:

[0059] Unbleached grass pulp 40%,

[0060] Unbleached bamboo pulp 60%.

[0061] The preparation method of non-wood type natural color paste food wrapping paper of the present invention, comprises the steps:

[0062] (1) Mixing 40% unbleached grass pulp and 60% unbleached bamboo pulp in a pulp tank to make the pulp uniform and obtain a 9% pulp.

[0063] In step (2), beating is performed in a low-consistency refiner, the refining speed is 20,000 rpm, and...

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Abstract

The invention discloses a non-wood unbleached pulp food wrap paper and a preparation method thereof. Slurry of the non-wood unbleached pulp food wrap paper is prepared from unbleached straw pulp and unbleached bamboo pulp, the fixed quantity of the wrap paper ranges from 45 g / m<2> to 65 g / m<2>, and the content of synthetic papermaking additives accounts for 0.5%-2.5% of oven dry stock. The wrap paper is safe and environmentally friendly, the natural color of plant fiber is kept, dust and chips do not exist, no hazardous substance is produced in a papermaking technology, the waste water treatment cost is lowered, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of paper manufacturing, in particular to a non-wood natural color paste food wrapping paper and a preparation method thereof. Background technique [0002] In recent years, with people's increasing attention to environmental issues such as "white pollution", the demand and advantages of paper packaging in the field of food packaging have become more and more obvious. In some countries in the world, plastic bags are prohibited for packaged food, and the use of paper products for green packaging is advocated. It is estimated that the output of paper packaging products in my country will reach 36 million tons by 2015. Paper products are environmentally friendly and hygienic, harmless and non-toxic, but the raw materials may be polluted during the production of packaging paper, or during processing, there are usually some impurities, bacteria and various functional types added in the production process. Auxili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H15/10D21H11/12D21H17/24D21D1/20D21F11/00D21H27/10
CPCD21D1/20D21F11/00D21H11/12D21H15/10D21H17/24D21H27/10
Inventor 邹海平刘志刚俞京朱有佘胜胜王涛孔祥玉李刚
Owner ANHUI GEYI CYCLIC ECONOMY IND PARK
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