CN111253659A - Production process of long fiber composite board for packing box - Google Patents
Production process of long fiber composite board for packing box Download PDFInfo
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- CN111253659A CN111253659A CN202010042259.8A CN202010042259A CN111253659A CN 111253659 A CN111253659 A CN 111253659A CN 202010042259 A CN202010042259 A CN 202010042259A CN 111253659 A CN111253659 A CN 111253659A
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- powder
- epoxy resin
- mixed powder
- packing box
- fiber composite
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a production process of a long fiber composite board for a packing box, which comprises the following steps: sieving the wood powder; sieving the recovered epoxy resin powder; uniformly mixing the screened wood powder, the screened recycled epoxy resin powder and the polyethylene powder according to the mass ratio of 100: 100-; firstly, uniformly spreading mixed powder on a bottom plate of a mold, then spreading glass fiber cloth on the mixed powder, then uniformly spreading the mixed powder on the glass fiber cloth, then uniformly coating epoxy resin glue on the mixed powder to form a thin layer, finally closing the mold, carrying out hot pressing for 20-60 minutes at the temperature of 100-200 ℃ and under the pressure of 5-35MPa for molding, opening the mold and taking out a product, thus obtaining the long fiber composite plate for the packing box. The bending strength of the prepared long fiber composite board reaches 30-45MPa, the long fiber composite board meets the use requirement of the box board of the wood packing box, the environmental protection benefit is outstanding, the industrial value is huge, and the 'waste is turned into wealth' is really realized.
Description
Technical Field
The invention relates to the field of composite boards, in particular to a production process of a long fiber composite board for a packing box.
Background
The epoxy resin is widely applied to a plurality of fields of electronic appliances, power industry, wind power generation, chemical industry, aerospace, civil engineering and construction, sports goods and the like. The thermosetting epoxy resin product is commonly called glass fiber reinforced plastic, and is insoluble and infusible due to the special three-dimensional network structure, so that the waste is difficult to recycle by the conventional plastic recycling method. A large amount of thermosetting epoxy resin waste is accumulated in a corner due to difficulty in recycling or is directly buried.
Typical thermosetting epoxy resin products mainly include printed circuit boards in the electronic and electrical industry, insulating pipes in transformers in the power industry, blades of wind driven generators and the like. Epoxy resin products in these industries become the main source of thermosetting epoxy resin wastes after being discarded, and also include leftover materials and unqualified products generated in the production process of the epoxy resin products. The largest amount of all thermosetting epoxy resin wastes is the waste printed circuit boards in the electronic and electrical industry.
A Printed Circuit Board (PCB) is the most basic component in an electronic product, and is the basis for the interconnection of each component in the electronic product. As the number of discarded electronic products is continuously increased, the number of discarded PCBs is also increased year by year. In addition to being derived from electronic waste, one source of waste PCBs is scrap and rejects produced during PCB production. Leftover materials and unqualified products account for about 10-20% of the total production amount of the PCB. China is a large producing country of printed circuit boards, so that a large amount of leftover materials and unqualified products are produced every year.
The waste PCBs contain a large amount of metals, and many enterprises are engaged in recycling the metals from the waste PCBs. Through the steps of disassembling, crushing, sorting and the like, most of metals can be recycled, and the remaining non-metal powder becomes secondary pollutants and is accumulated in a certain corner in a large amount.
Landfilling and incineration are conventional methods for large-scale disposal of these thermosetting epoxy resin wastes. Landfill not only occupies precious land resources, but also pollutes the environment. Some thermosetting epoxy resin wastes contain heavy metals and brominated flame retardants, which are leached by rainwater to contaminate soil, groundwater, and the like. Incineration produces a large amount of slag, and wastes containing brominated flame retardants produce a large amount of toxic substances, particularly polybrominated dibenzodioxins and polybrominated dibenzofurans, when incinerated.
At present, in order to reduce the usage amount of wood in the wood packaging box industry, wood-plastic boards and other wood composite boards are gradually adopted to replace solid wood boards so as to protect forest resources and save production cost, and resin materials can be used as main raw materials of the wood composite boards, so that the recycled epoxy resin powder is considered as the raw materials to produce the wood composite boards meeting the use requirements of the wood packaging box boards, and the purpose of changing waste into valuables is achieved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a production process for manufacturing a long fiber composite board for a packing box by utilizing recycled epoxy resin powder.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: a production process of a long fiber composite board for a packing box comprises the following steps:
A. sieving the wood powder, and removing impurities to obtain the wood powder with uniform particle size;
B. sieving the recovered epoxy resin powder to remove impurities to obtain the recovered epoxy resin powder with uniform particle size;
C. uniformly mixing the screened wood powder, the screened recycled epoxy resin powder and the polyethylene powder according to the mass ratio of 100: 100-;
D. firstly, uniformly spreading mixed powder on a bottom plate of a mold, then spreading glass fiber cloth on the mixed powder, then uniformly spreading the mixed powder on the glass fiber cloth, then uniformly coating epoxy resin glue on the mixed powder to form a thin layer, finally closing the mold, carrying out hot pressing for 20-60 minutes at the temperature of 100-200 ℃ and under the pressure of 5-35MPa for molding, opening the mold and taking out a product, thus obtaining the long fiber composite plate for the packing box.
Preferably, the glass fiber cloth in the step D can be replaced by glass fiber yarns, and the glass fiber yarns are uniformly spread on the mixed powder to completely cover the mixed powder.
Due to the application of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the method has the advantages that a large amount of recycled epoxy resin powder is used, the epoxy resin powder can be put into use without special treatment in advance, the process flow is simple, raw materials are easy to obtain, the technical requirement is low, the production efficiency is high, the economic benefit is good, the bending strength of the prepared long fiber composite board reaches 30-45MPa, the use requirement of the wood packing box board is met, the environmental protection benefit is outstanding, the industrial value is huge, and the 'waste is really changed into valuable'.
Detailed Description
The present invention will be further described in detail with reference to the following specific examples:
example 1
The long fiber composite board for the packing box is prepared by the following steps:
A. sieving the wood powder, and removing impurities to obtain the wood powder with uniform particle size;
B. sieving the recovered epoxy resin powder to remove impurities to obtain the recovered epoxy resin powder with uniform particle size;
C. uniformly mixing the screened wood powder, the screened recycled epoxy resin powder and the polyethylene powder according to the mass ratio of 100:150:10, and then putting the mixture into an open mill for open milling for 3 times, wherein the open milling time is 30 minutes each time, so as to obtain mixed powder;
D. uniformly spreading the mixed powder on a bottom plate of a mold, spreading glass fiber cloth on the mixed powder, uniformly spreading the mixed powder on the glass fiber cloth, uniformly coating epoxy resin glue on the mixed powder to form a thin layer, closing the mold, performing hot pressing at the temperature of 150 ℃ and the pressure of 30MPa for 45 minutes to form, opening the mold and taking out a product to obtain the long fiber composite board for the packing box.
The bending strength of the prepared long fiber composite board for the packing box is 40MPa through detection.
Example 2
The long fiber composite board for the packing box is prepared by the following steps:
A. sieving the wood powder, and removing impurities to obtain the wood powder with uniform particle size;
B. sieving the recovered epoxy resin powder to remove impurities to obtain the recovered epoxy resin powder with uniform particle size;
C. uniformly mixing the screened wood powder, the screened recycled epoxy resin powder and the polyethylene powder according to the mass ratio of 100:120:15, and then putting the mixture into an open mill for open milling for 3 times, wherein the open milling time is 20 minutes each time, so as to obtain mixed powder;
D. uniformly spreading the mixed powder on a bottom plate of a mold, spreading glass fiber cloth on the mixed powder, uniformly spreading the mixed powder on the glass fiber cloth, uniformly coating epoxy resin glue on the mixed powder to form a thin layer, closing the mold, carrying out hot pressing for 50 minutes at the temperature of 150 ℃ and under the pressure of 30MPa for forming, opening the mold and taking out a product to obtain the long fiber composite board for the packing box.
The bending strength of the prepared long fiber composite board for the packing box is 38MPa through detection.
Example 3
The long fiber composite board for the packing box is prepared by the following steps:
A. sieving the wood powder, and removing impurities to obtain the wood powder with uniform particle size;
B. sieving the recovered epoxy resin powder to remove impurities to obtain the recovered epoxy resin powder with uniform particle size;
C. uniformly mixing the screened wood powder, the screened recycled epoxy resin powder and the polyethylene powder according to the mass ratio of 100:100:20, and then putting the mixture into an open mill for open milling for 3 times, wherein the open milling time is 30 minutes each time, so as to obtain mixed powder;
D. uniformly spreading the mixed powder on a bottom plate of a mold, spreading glass fiber cloth on the mixed powder, uniformly spreading the mixed powder on the glass fiber cloth, uniformly coating epoxy resin glue on the mixed powder to form a thin layer, closing the mold, performing hot pressing at the temperature of 200 ℃ and the pressure of 35MPa for 60 minutes to form, opening the mold and taking out a product to obtain the long fiber composite board for the packing box.
The bending strength of the prepared long fiber composite board for the packing box is 43MPa through detection.
In the above embodiment, the glass fiber cloth in step D may be replaced by glass fiber yarn, and the glass fiber yarn is uniformly spread on the mixed powder to form a thin layer to isolate the two layers of mixed powder.
The innovation of the invention is as follows: the method has the advantages that a large amount of recycled epoxy resin powder is used, the epoxy resin powder can be put into use without special treatment in advance, the process flow is simple, raw materials are easy to obtain, the technical requirement is low, the production efficiency is high, the economic benefit is good, the bending strength of the prepared long fiber composite board reaches 30-45MPa, the use requirement of the wood packing box board is met, the environmental protection benefit is outstanding, the industrial value is huge, and the 'waste is really changed into valuable'.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (2)
1. The production process of the long fiber composite board for the packing box is characterized by comprising the following steps of:
A. sieving the wood powder, and removing impurities to obtain the wood powder with uniform particle size;
B. sieving the recovered epoxy resin powder to remove impurities to obtain the recovered epoxy resin powder with uniform particle size;
C. uniformly mixing the screened wood powder, the screened recycled epoxy resin powder and the polyethylene powder according to the mass ratio of 100: 100-;
D. firstly, uniformly spreading mixed powder on a bottom plate of a mold, then spreading glass fiber cloth on the mixed powder, then uniformly spreading the mixed powder on the glass fiber cloth, then uniformly coating epoxy resin glue on the mixed powder to form a thin layer, finally closing the mold, carrying out hot pressing for 20-60 minutes at the temperature of 100-200 ℃ and under the pressure of 5-35MPa for molding, opening the mold and taking out a product, thus obtaining the long fiber composite plate for the packing box.
2. The production process of the long fiber composite board for the packing box according to claim 1, characterized in that: and D, replacing the glass fiber cloth with glass fiber yarns, uniformly spreading the glass fiber yarns on the mixed powder, and completely covering the mixed powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010042259.8A CN111253659A (en) | 2020-01-15 | 2020-01-15 | Production process of long fiber composite board for packing box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010042259.8A CN111253659A (en) | 2020-01-15 | 2020-01-15 | Production process of long fiber composite board for packing box |
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| CN111253659A true CN111253659A (en) | 2020-06-09 |
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| CN202010042259.8A Pending CN111253659A (en) | 2020-01-15 | 2020-01-15 | Production process of long fiber composite board for packing box |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130274382A1 (en) * | 2010-12-30 | 2013-10-17 | Chaofeng Xiao | Plate synthesized by waste circuit board powder and manufacturing process thereof |
| CN103788448A (en) * | 2012-11-01 | 2014-05-14 | 常州翔宇资源再生科技有限公司 | Resin plastic wood prepared from waste plastic of waste circuit board, and preparation method and application thereof |
| CN103834100A (en) * | 2013-12-05 | 2014-06-04 | 江苏理工学院 | Reinforced resin-plastic compound plate prepared from waste printed circuit board (PCB) powder and preparation method thereof |
| CN104588393A (en) * | 2014-12-31 | 2015-05-06 | 陈烽锋 | Method for producing environment-friendly non-wood board by utilizing waste circuit boards and corner wastes |
| CN108314825A (en) * | 2018-03-07 | 2018-07-24 | 合肥舒实工贸有限公司 | Production technology for plastic products |
| CN110003677A (en) * | 2019-04-24 | 2019-07-12 | 安徽大学 | A kind of halogen-free polypropylene flame redardant wood plastic composite and preparation method thereof |
-
2020
- 2020-01-15 CN CN202010042259.8A patent/CN111253659A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130274382A1 (en) * | 2010-12-30 | 2013-10-17 | Chaofeng Xiao | Plate synthesized by waste circuit board powder and manufacturing process thereof |
| CN103788448A (en) * | 2012-11-01 | 2014-05-14 | 常州翔宇资源再生科技有限公司 | Resin plastic wood prepared from waste plastic of waste circuit board, and preparation method and application thereof |
| CN103834100A (en) * | 2013-12-05 | 2014-06-04 | 江苏理工学院 | Reinforced resin-plastic compound plate prepared from waste printed circuit board (PCB) powder and preparation method thereof |
| CN104588393A (en) * | 2014-12-31 | 2015-05-06 | 陈烽锋 | Method for producing environment-friendly non-wood board by utilizing waste circuit boards and corner wastes |
| CN108314825A (en) * | 2018-03-07 | 2018-07-24 | 合肥舒实工贸有限公司 | Production technology for plastic products |
| CN110003677A (en) * | 2019-04-24 | 2019-07-12 | 安徽大学 | A kind of halogen-free polypropylene flame redardant wood plastic composite and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陶婉蓉等: "《高性能聚合物基复合材料》", 31 August 1989, 上海科学技术出版社 * |
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Application publication date: 20200609 |