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Oriented structural paper made of waste material

A waste material and paper shredding technology, which is applied in the field of new packaging materials and directional structure to make paper, can solve the problems of environmental pollution and resource waste, and achieve the effect of solving resource waste and environmental pollution problems, environmental protection and excellent performance

Inactive Publication Date: 2019-02-26
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the current state of the art, the technical problem to be solved by the present invention is: using rice straw, wheat straw, cotton linters, wood shavings, bamboo, and shredded paper as raw materials, and making them with directional structure through pretreatment and directional bonding. The production process can continue to use pulping and papermaking, or directional structure bonding technology and equipment to solve the above-mentioned resource waste and environmental pollution problems

Method used

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  • Oriented structural paper made of waste material

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Embodiment 1: With rice straw and wheat straw as raw material, it is carried out crushing treatment, selects length 30mm to 40mm, the material of width 3mm to 5mm, with urea-formaldehyde resin (UF) and diphenylmethane diisocyanate (MDI) The mixed glue UF-MDI (MDI mass content 15%, sizing amount 7%) is used for sizing, directional paving, and hot pressing. The obtained cardboard is a single layer, the thickness is about 5mm, has a certain structural strength, and the formaldehyde emission is lower than 9mg (100g) -1 , can be used as mat or packing carton.

Embodiment 2

[0013] Embodiment 2: as figure 1 As shown, it is a wrapping paper with a three-layer structure, the first and third layers are moisture-proof and wear-resistant layers, and the second layer is a shaving layer. The implementation method is:

[0014] 1) First make the particle board 2, using wheat straw and particle wood as raw materials, through crushing and screening, to obtain a material with a length of 30mm to 50mm and a width of 2mm to 10mm, and synthesize the oriented structure according to the method of Example 1. Single-layer cardboard, the thickness is about 5mm.

[0015] 2) Using polyvinyl alcohol (PVA) powder as an adhesive, the two surfaces of the cardboard obtained in the previous step are respectively hot-pressed.

Embodiment 3

[0016] Embodiment 3: as figure 1 As shown, it is a wrapping paper with a three-layer structure, the first and third layers are shredded paper layers, and the second layer is a wood shaving layer. The implementation method is:

[0017] 1) First make the particle board 2, using wheat straw and particle wood as raw materials, through crushing and screening, to obtain a material with a length of 30mm to 50mm and a width of 2mm to 10mm, and synthesize the oriented structure according to the method of Example 1. Single-layer cardboard, the thickness is about 5mm.

[0018] 2) Using shredded paper as raw material, crushing and sorting to obtain relatively broken materials, using polyvinyl alcohol (PVA) powder as an adhesive, and hot-pressing the two surfaces of the cardboard obtained in the previous step. The total thickness of the formed three-layer structure cardboard is about 9mm, the first and third layers are shredded paper layers, each layer has a thickness of about 2mm, and t...

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Abstract

Oriented structural paper made of a waste material has a three-layer structure including a damp-proof wear-resistant layer 1, a structural base layer 2 and a damp-proof wear-resistant layer 3 from topto bottom. The structural base layer 2 is made of one or more of rice straw, wheat straw, wood shavings and bamboos. The damp-proof wear-resistant layers 1 and 3 can be made of an adhesive sizing agent and can also be made of one or two of linters and shredded paper. The oriented structural paper is made through preprocessing and oriented adhering, and a pulping papermaking or oriented structuraladhering technology and device can be applied in the production process. The oriented structural paper has the advantages of the damp-proof wear-resistant layers and the structural base layer and hasthe advantages of being high in structural strength and adhering strength, smooth in surface, high in oil resistance, capable of stopping gas permeation, environmentally friendly, free of toxin and capable of replacing kraft paper to serve as a packaging box board.

Description

technical field [0001] The invention provides a kind of oriented structure paper made of waste materials, especially relates to a new type of packaging material, more specifically relates to the oriented structure way of making paper. Background technique [0002] In recent years, with the development of the global logistics and transportation industry, more and more packaging materials, such as wrapping paper and packaging bags, are required. my country is a big manufacturing country. According to the statistics of the World Packaging Association, in 2011, the market size of my country's packaging paper industry reached 150 billion US dollars, accounting for 22.5% of the world. However, due to the backwardness of my country's packaging industry, a large number of waste packaging materials are harmful to the environment, and packaging materials are developing in a green and environmentally friendly direction. [0003] my country is a large agricultural country, but limited ...

Claims

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Application Information

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IPC IPC(8): B27N3/02B27N3/10B32B9/02B32B9/04B32B9/06B32B21/02B32B21/08B32B21/06B32B27/30B32B7/12
CPCB27N3/02B27N3/002B27N3/10B32B7/12B32B9/02B32B9/043B32B9/06B32B21/02B32B21/06B32B21/08B32B27/306B32B2250/40B32B2307/554B32B2307/7242B32B2307/7265B32B2439/62
Inventor 代建军康秦豪汪春雷毛笑张贺东高作鹏敖文雅付洁刘洋冉春梅
Owner BEIJING UNIV OF CHEM TECH