CN103113648B - Method for manufacturing environment-friendly board by using waste PCB (Printed Circuit Board) - Google Patents
Method for manufacturing environment-friendly board by using waste PCB (Printed Circuit Board) Download PDFInfo
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- CN103113648B CN103113648B CN201310029905.7A CN201310029905A CN103113648B CN 103113648 B CN103113648 B CN 103113648B CN 201310029905 A CN201310029905 A CN 201310029905A CN 103113648 B CN103113648 B CN 103113648B
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- urotropine
- stearic acid
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Abstract
The invention provides a method for manufacturing an environment-friendly board by using a waste PCB (Printed Circuit Board), comprising the following steps of: (1) the preparation of a bonder: mixing polyolefin, stearic acid or stearate with urotropin to prepare the bonder; and (2) mixing the bonder acquired in the step (1) with waste PCB powder to acquire the environment-friendly board. The method is simple in operation; and the acquired environment-friendly board has high performance and can serve as an insulating material or a building material for manufacturing floor tiles, composite slabs and the like.
Description
Technical field: the present invention relates to a kind of method utilizing discarded pcb board powder to make sheet material.The sheet material made as insulating material, also can be used as the material of construction such as floor tile.The invention belongs to the Treatment and recovery technical field of trade waste.
Background technology:
Along with the fast development of global electronic technology, electronic waste comprises waste computer, refrigerator, televisor, signal equipment etc. has become new environment hidden danger.According to statistics, the annual electronic waste of China reaches more than 100 ten thousand tons.Discarded printed circuit boards (PCB) is the one of electronic waste, wherein containing the metal that the multiple recovery value such as gold and silver, copper is higher, this becomes the Main Economic motivating force that waste printed circuit board reclaims industry, as the raising along with state of the art, the reduction of cost, discarded PCB per ton can extract the gold of about 300 grams, and market value is close to 100,000 yuan.Therefore current research emphasis also concentrates on the rare metal how reclaimed in waste printed circuit board, and ignores the nonmetallic recycling problem of PCB.
PCB non-metallic material are mainly with the mixture of glass fibre, epoxies and phenolic resinoid composition.Wherein glass fibre calorific value is low, is difficult to the method process by burning; Epoxies and phenolic resinoid are thermosetting resin, are difficult to fusing and dissolve.At present, landfill is the main method of the useless PCB non-metallic material of extensive process, but it is lost as rubbish, can cause a large amount of wastings of resources and environmental pollution.Pyrolysis method is also a kind of method of the useless PCB non-metallic material of process, but due to the organism containing complexity in PCB non-metallic material, multiple obnoxious flavour will certainly be produced as dioxin etc. in the process of process, cause the secondary pollution to environment, and pyrolysis method cost is high, complex process, is not suitable for large-scale application.
Modern architecture industry high speed development, needs a large amount of building board, thus consumes a large amount of timber, not only causes timber resources to peter out, and cost raises, and indirectly causes environmental disruption.Therefore utilize useless PCB non-metallic material to make building board, not only can reduce the cost of building board, avoid at substantial timber resources, especially the good method of one of the useless PCB non-metallic material of process.
Summary of the invention:
The invention provides a kind of method utilizing waste PCB to make high-performance sheet material, solve the problem of environmental pollution of waste circuit board nonmetallic material to a certain extent, the environment-friendly sheet of low cost, high weight can be obtained again simultaneously.The sheet material obtained can be used as insulating material, also can be used as the material of construction of Manufacture of Floor brick etc.
Particularly, the invention provides a kind of method utilizing waste PCB powder to make environment-friendly sheet, it is characterized in that, comprise the steps:
(1) preparation of binding agent: polyolefine, stearic acid or stearate are mixed obtained described binding agent with urotropine;
(2) above-mentioned steps gained binding agent and waste PCB powder are mixed to get described environment-friendly sheet.
Preferably, described polyolefine is polypropylene or polyethylene.
Preferably, described stearate is sodium stearate.
Preferably, wherein step (1) and step (2) specific as follows:
(1) preparation of binding agent: described polyolefine is polypropylene or polyethylene, described stearate is sodium stearate, and relative to the gross weight of binding agent, polypropylene or poly weight percent are 60%-70%, the weight percent of stearic acid or sodium stearate is 20%-25%, the weight percent of urotropine is about 10%, the preparation process of binding agent is specially and first stearic acid or sodium stearate is mixed with urotropine, grinding powder, mix, finally add polypropylene or polyethylene, Homogeneous phase mixing, obtain described binding agent;
(2) above-mentioned binding agent is put into mould with waste PCB powder with the ratio of weight percent 60-70%:30-40% to mix, first by mould and die preheating 5min, then by mold heated to 160 DEG C-170 DEG C, repeatedly pressurize in heat-processed, finally under 30MPa-50MPa, keep 10-15min, turn off power supply, be cooled to unloading pressure after room temperature, namely molding obtains high-performance environment-friendly sheet material.
Preferably, wherein said polyolefine is polypropylene (PP), and described stearic acid or stearate use stearic acid, and do not use sodium stearate, and polypropylene (PP), stearic acid and urotropine weight ratio are 6.5:2.5:1.
Preferably, the weight percent of polypropylene (or polyethylene) is 60%-70%, and the weight percent of stearic acid (or sodium stearate) is 20%-25%, and the weight percent of urotropine is about 10%.
Polypropylene (PP) is as the main component of high-performance adhesive, and nontoxic, tasteless, density is little, acid and alkali-resistance, has higher intensity, rigidity, but wear resistance generally, easily aging.So polypropylene can not separately as the solidifying agent of bonding waste PCB powder.In polypropylene (or polyethylene), add a small amount of urotropine, the solidification process of polypropylene (or polyethylene) can be changed, greatly improve polyacrylic wear resistance.In addition, stearic acid or sodium stearate mix with suitable ratio and polypropylene or polyethylene and urotropine and can reach all comparatively outstanding effect of wear resistance, intensity and plate surface slickness.
Specific embodiment mode:
Embodiment 1: polypropylene (PP), stearic acid and urotropine that weigh ratio is 7:2:1.First stearic acid is mixed with urotropine, grinding powder, finally add polypropylene (PP), mix.Be that this mixture and the waste PCB powder of 3:7 mixes by weight ratio, put into mould compacting.The first preheating 5min of mould, then by mold heated to 170 DEG C, repeatedly pressurizes, finally under 40MPa, keeps 15min, turn off power supply in heat-processed, and be cooled to unloading pressure after room temperature, namely molding obtains high-performance environment-friendly sheet material.
Embodiment 2: polypropylene (PP), stearic acid and urotropine that weigh ratio is 6.5:2.5:1.First stearic acid is mixed with urotropine, grinding powder, finally add polypropylene (PP), mix.Be that this mixture and the waste PCB powder of 3:7 mixes by weight ratio, put into mould compacting.The first preheating 5min of mould, then by mold heated to 170 DEG C, repeatedly pressurizes, finally under 40MPa, keeps 15min, turn off power supply in heat-processed, and be cooled to unloading pressure after room temperature, namely molding obtains high-performance environment-friendly sheet material.Result shows, and the sheet material that this embodiment obtains has higher surface smoothness compared with the sheet material of embodiment 1.
Embodiment 3: polypropylene (PP), sodium stearate and urotropine that weigh ratio is 7:2:1.First sodium stearate is mixed with urotropine, grinding powder, finally add polypropylene (PP), mix.Be that this mixture and the waste PCB powder of 3:7 mixes by weight ratio, put into mould compacting.The first preheating 5min of mould, then by mold heated to 170 DEG C, repeatedly pressurizes, finally under 40MPa, keeps 15min, turn off power supply in heat-processed, and be cooled to unloading pressure after room temperature, namely molding obtains high-performance environment-friendly sheet material.
Embodiment 4: polyethylene, stearic acid and urotropine that weigh ratio is 7:2:1.First stearic acid is mixed with urotropine, grinding powder, finally add polyethylene, mix.Be that this mixture and the waste PCB powder of 3:7 mixes by weight ratio, put into mould compacting.The first preheating 5min of mould, then by mold heated to 170 DEG C, repeatedly pressurizes, finally under 40MPa, keeps 15min, turn off power supply in heat-processed, and be cooled to unloading pressure after room temperature, namely molding obtains high-performance environment-friendly sheet material.
Comparative example 1: other condition is in the same manner as in Example 1, difference is to replace polypropylene with polystyrene.Result shows, and under same test condition, the breaking tenacity of gained sheet material is about 4/5ths of embodiment 1 gained sheet material, and surface smoothness is also obviously not as embodiment 1 gained sheet material.
Comparative example 2: other condition is identical with embodiment 3, difference is to replace sodium stearate with calcium stearate.Result shows, and under same test condition, the breaking tenacity of gained sheet material and wear resistance are about 4/5ths of embodiment 1 gained sheet material, and surface smoothness is also obviously not as embodiment 1 gained sheet material.
Comparative example 3: other condition is identical with embodiment 1, difference is that the weight ratio of polypropylene (PP), stearic acid and urotropine is 8:1:1.Result shows, and under same test condition, the breaking tenacity of gained sheet material is about 4/5ths of embodiment 1 gained sheet material, and surface smoothness is also obviously not as embodiment 1 gained sheet material.
Claims (1)
1. utilize waste PCB powder to make a method for environment-friendly sheet, it is characterized in that, comprise the steps:
(1) preparation of binding agent: polyolefine, stearic acid or sodium stearate are mixed obtained described binding agent with urotropine;
(2) above-mentioned steps gained binding agent and waste PCB powder are mixed to get described environment-friendly sheet;
Wherein step (1) and step (2) specific as follows:
(1) preparation of binding agent: described polyolefine is polypropylene or polyethylene, and relative to the gross weight of binding agent, polypropylene or poly weight percent are 60%-70%, the weight percent of stearic acid or sodium stearate is 20%-25%, the weight percent of urotropine is 10%, the preparation process of binding agent is specially and first stearic acid or sodium stearate is mixed with urotropine, grinding powder, mix, finally add polypropylene or polyethylene, Homogeneous phase mixing, obtains described binding agent;
(2) above-mentioned binding agent is put into mould with waste PCB powder with the ratio of weight percent 60-70%:30-40% to mix, first by mould and die preheating 5min, then by mold heated to 160 DEG C-170 DEG C, repeatedly pressurize in heat-processed, finally under 30MPa-50MPa, keep 10-15min, turn off power supply, be cooled to unloading pressure after room temperature, namely molding obtains high-performance environment-friendly sheet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310029905.7A CN103113648B (en) | 2013-01-25 | 2013-01-25 | Method for manufacturing environment-friendly board by using waste PCB (Printed Circuit Board) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310029905.7A CN103113648B (en) | 2013-01-25 | 2013-01-25 | Method for manufacturing environment-friendly board by using waste PCB (Printed Circuit Board) |
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| CN103113648A CN103113648A (en) | 2013-05-22 |
| CN103113648B true CN103113648B (en) | 2015-05-13 |
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| CN201310029905.7A Expired - Fee Related CN103113648B (en) | 2013-01-25 | 2013-01-25 | Method for manufacturing environment-friendly board by using waste PCB (Printed Circuit Board) |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106847370A (en) * | 2017-01-12 | 2017-06-13 | 惠州新联兴实业有限公司 | New PCB/CCL castoff regeneratives resistance slurry and preparation method thereof |
| CN110219428A (en) * | 2019-05-14 | 2019-09-10 | 广东欧铭新材料科技有限公司 | A kind of fire-proof and water-proof composite floor board and decorative panel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676298A (en) * | 2005-02-03 | 2005-10-05 | 上海交通大学 | Method for manufacturing regenerative board from base board material granule of waste printed circuit board |
| CN101037527A (en) * | 2007-03-29 | 2007-09-19 | 上海交通大学 | Method for preparing bakelite by using nonmetal material in waste printing circuit board |
| CN101591459A (en) * | 2009-07-02 | 2009-12-02 | 上海交通大学 | Utilize discarded printed circuit boards to prepare the method for wood plastic composite |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676298A (en) * | 2005-02-03 | 2005-10-05 | 上海交通大学 | Method for manufacturing regenerative board from base board material granule of waste printed circuit board |
| CN101037527A (en) * | 2007-03-29 | 2007-09-19 | 上海交通大学 | Method for preparing bakelite by using nonmetal material in waste printing circuit board |
| CN101591459A (en) * | 2009-07-02 | 2009-12-02 | 上海交通大学 | Utilize discarded printed circuit boards to prepare the method for wood plastic composite |
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