Method for preparing unbleached pulp of raw material of egg trays with tail pulp of crop straws

A technology for crop straw and egg trays, which is applied in the fields of cellulose raw material pulping, fiber raw material processing, non-woody plant/crop pulp, etc., to achieve good economic benefits, eliminate toxic and side effects, and facilitate wide-scale popularization and use

Inactive Publication Date: 2016-09-28
紫荷花(北京)科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of existing paper mold egg trays using slurry, and to provide a method that can maintain the pure natural color of plant fibers, and no longer use bleaching agents, brighteners and other harmful chemicals in the production process. Auxiliary, the method of using the crop straw pulp to make the natural color pulp of the raw material of the egg tray

Method used

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  • Method for preparing unbleached pulp of raw material of egg trays with tail pulp of crop straws
  • Method for preparing unbleached pulp of raw material of egg trays with tail pulp of crop straws
  • Method for preparing unbleached pulp of raw material of egg trays with tail pulp of crop straws

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Embodiment

[0027] The concrete processing method of the inventive method is as follows:

[0028] 1. Straw cooking to prepare coarse pulp: Straw raw materials, such as wheat straw, rice straw, corn straw, etc., pass through the feeding part of the 12T grass cutter, enter the knife roller part and cut to a length of 20-40mm, and enter the eight-roller horn through the discharge conveyor belt. Dust removal equipment, qualified grass flakes are transported to the first and second presoakers by scrapers, mixed evenly with cooking liquid (sodium hydroxide), and then loaded into steaming balls. Seal the ball cover and carry out idling, heating, and heat preservation. The cooking pressure is controlled within the range of 0-0.65MPa, and the steam is released and sprayed. The coarse slurry after cooking is sprayed into the spray chamber.

[0029] 2. Extraction of black liquor by pulping machine: the coarse pulp in the spray bin is then fed into the single-screw squeezer through the feeding screw ...

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Abstract

The invention relates to a method for producing uncolored pulp as a raw material for egg tray boxes from crop straw tail pulp, and the invention belongs to the technical field of pulp and papermaking. The method is to store the collected crop stalks including wheat straw, rice straw, and corn stalks and dry them in the air, and then pretreat the crop stalks with biological enzymes——cooking the straws to prepare coarse pulp——extracting black liquor with a pulper——extracting black liquor with a vacuum washer— ——Primary natural color coarse stock——Pressure sieve primary screening——Secondary natural color coarse stock——Low-concentration secondary slag removal——Rotary screen concentration process, good pulp is used to produce natural color tissue paper, and tail pulp is made into egg trays Raw material natural color pulp. The invention utilizes the egg tray raw material slurry made of pure natural crop straws, which eliminates the unenvironmental protection and toxic and side effects on human health such as ink and residual chlorine remaining in the waste paper raw materials used in the original egg tray, and is the best choice in the practical process of egg storage and transportation Environmental protection revolution, while making full use of all products in the straw pulping process, maximizing the pulping efficiency.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for producing uncolored pulp as raw material of egg tray boxes from crop straw pulp. Background technique [0002] The existing main raw material for making pulp molded egg trays—waste paper is put into a hydropulper, and is decomposed into pulp fibers under the shear force and friction of water flow; the pulp fibers enter the pulp storage tank. In order to make the appearance of the product more beautiful and clean, it is necessary to screen the slurry in the slurry tank, that is, to remove impurities in the fiber slurry, such as film sheets, hemp ropes, and coarse slag. At the same time, the slurry should be further ground. In order to make the egg tray waterproof and other properties, it is also necessary to add waterproof additives during the grinding process. After that, the slurry is diluted to a certain concentration, and finally sent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21C3/02D21C3/22D21C5/00
CPCD21H11/12D21C3/02D21C3/222D21C5/005
Inventor 杨淑芬杨洁汪峰
Owner 紫荷花(北京)科技有限公司
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