CN102632616A - Preparation method for pressing ultra-thin polyethylene plate with ultrahigh molecular weight - Google Patents
Preparation method for pressing ultra-thin polyethylene plate with ultrahigh molecular weight Download PDFInfo
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- CN102632616A CN102632616A CN2012100901210A CN201210090121A CN102632616A CN 102632616 A CN102632616 A CN 102632616A CN 2012100901210 A CN2012100901210 A CN 2012100901210A CN 201210090121 A CN201210090121 A CN 201210090121A CN 102632616 A CN102632616 A CN 102632616A
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Abstract
The invention relates to polyethylene material processing technology, in particular to a preparation method for pressing an ultra-thin polyethylene plate with an ultrahigh molecular weight, which solves the technical problem of poor quality in production of existing ultra-thin polyethylene plates with ultrahigh molecular weights. The preparation method includes steps: firstly, adding a flow improver with the weight proportion ranging from 0.3% to 0.6% into high-molecular polyethylene raw materials; and secondly, realizing a mold pressing and sintering molding process. The hot pressing pressure ranges from 14MPa to 17MPa, the hot pressing temperature ranges from 180 DEG C to 230 DEG C hot pressing lasts for 60 to 120 minutes, the cold pressing pressure ranges from 20MPa to 24MPa, the cold pressing temperature ranges from 50 DEG C to 80 DEG C, and cold pressing lasts for 180 to 240 minutes. The high-molecular polyethylene plate with the thickness ranging from 2mm to 5mm is manufactured according to a process path of the preparation method, accordingly is uniform in thickness and quality and free of bubbles, watermark and grains, and is greatly improved in terms of abrasion resistance, impact resistance, stretching resistance, yield strength, stretch rate and thermal deformation.
Description
Technical field
The present invention relates to a kind of polythene material process technology, be specially a kind of preparation method who suppresses ultra-thin ultra-high molecular weight polyethylene board.
Background technology
Ultra-high molecular weight polyethylene (UHMW-PE) is a kind of thermoplastic engineering plastic with excellent combination property of linear structure; Mean molecule quantity is about 350,000～8,000,000, has the performances such as shock-resistant, wear-resistant, self lubricity, resistance to chemical attack of the unrivaled excellence of other plastics because of molecular weight is high.
Because the viscosity of ultra-high molecular weight polyethylene (UHMW-PE) molten condition is up to 108Pa*s, mobile extreme difference, its melt index (MI) is almost nil, so be difficult to process with general machining process.In recent years; The process technology of ultra-high molecular weight polyethylene (UHMW-PE) has obtained developing rapidly; Through transformation to common process equipment, made ultra-high molecular weight polyethylene (UHMW-PE) by initial compacting-sinter molding develop into extrude, the moulding of blowing and injection moulding and other specific process.During existing ultra-high molecular weight polyethylene pressed sheet was produced, when the thickness of sheet material is 5mm or when being lower than 5mm, became uneven can appear in the plate of producing, and gives birth to ripe being mingled with, there was bubble the centre, and there are phenomenons such as watermark on the surface, and the sheet material that causes producing can not use.In the production of ultra-thin high molecular weight polyethylene board material; Also have through the method for extruding and to produce similar sheet material; But ultra-thin sheet material through extrusion method production; Because of the reasons such as consumption of processing technology and mobile modifier, aspect wear-resisting, shock-resistant, stretching, surrender, extensibility, the thermal deformation and require all to have big gap.
In " plastics are extruded " 2004 fifth phases; In the 13rd page; Point out " improve the processing characteristics of UHMWPE through flowability, such as with the resin alloy of high fluidities such as middle low molecular weight polyethylene, perhaps add flow ability modifying agent and improve its processability to reduce its viscosity." the forming technique present situation and the progress of ultra-high molecular weight polyethylene " (Gansu chemical industry, 2005 the 2nd phases), in point out the thinking of " organic matter blending and modifying ", and point out wherein can use solid paraffin, oil extract, stearate or ester etc.
But sneaking into usually of modifier can bring certain influence to product quality, and this influence has just to be had negatively, so the selection of modifier, it is very crucial that consumption and processing technology just seem.
Summary of the invention
The ropy technical problem of the present invention in order to exist in the production that solves ultra-thin high molecular weight polyethylene board material provides a kind of preparation method who suppresses ultra-thin ultra-high molecular weight polyethylene board.
Technical scheme of the present invention is; A kind of preparation method who suppresses ultra-thin ultra-high molecular weight polyethylene board; Step: one, in the High molecular weight polyethylene raw material, add the flow improving agent that part by weight is 0.3%-0.6% (macromolecule wax with or stearic acid), two, the molding sintering moulding process is that hot pressing pressure is 14-17MPa; Temperature is 180-230 ℃, and the time is 60-120 minute; The pressure of colding pressing is 20-24Mpa, and temperature is 50-80 ℃, and the time is 180-240 minute.
On the basis of technique scheme; Effect technical scheme preferably is; A kind of preparation method who suppresses ultra-thin ultra-high molecular weight polyethylene board; Step: one, in the High molecular weight polyethylene raw material, adding part by weight is 0.5% flow improving agent, and described flow ability modifying agent is 0.3% macromolecule wax and 0.2% stearic acid; Two, the molding sintering moulding process does, hot pressing pressure is 15MPa, and temperature is 200 ℃, and the time is 90 minutes; The pressure of colding pressing is 22Mpa, and temperature is 65 ℃, and the time is 210 minutes.
The High molecular weight polyethylene plate that the 2-5mm that processes according to this process route is thick, thickness is even, and quality is even, no bubble, the no watermark line of mixing, and all have bigger progress aspect wear-resisting, shock-resistant, stretching, surrender, extensibility, the thermal deformation.
The specific embodiment
The thickness of embodiment 1, target plate is 5mm, and length and width specification 2200mm*1400mm uses the molding sintering moulding process,
High-molecular polythene, the stearic acid of adding 0.5%, through " the heat back is cold earlier " process stempressing sinter molding, wherein hot pressing pressure is 15MPa, and temperature is 200, and the time is 70 minutes; The pressure of colding pressing is 16Mpa, and temperature is 60 degree, and the time is 200 minutes.
Control material uses extrudes processing technology.
The thickness of embodiment 2, target plate is 4mm, length and width specification 2200mm*1400mm, and the processing unit (plant) of use,
High-molecular polythene, the macromolecule wax of adding 0.5%, through " the heat back is cold earlier " process stempressing sinter molding, wherein hot pressing pressure is 17MPa, and temperature is 230, and the time is 120 minutes, and the pressure of colding pressing is 24Mpa, and temperature is 80 degree, and the time is 240 minutes.Control material uses extrudes processing technology.
The thickness of embodiment 3, target plate is 3mm, and length and width specification 2200mm*1400mm uses this process route, and control material uses extrudes processing technology.
High-molecular polythene, the macromolecule wax of adding 0.3% and 0.2% stearic acid, through " the heat back is cold earlier " process stempressing sinter molding, wherein hot pressing pressure is 14MPa, and temperature is 180, and the time is 60 minutes; The pressure of colding pressing is 20Mpa, and temperature is 50 degree, and the time is 180 minutes.
Contrast test; The reference substance processing scheme adopts the sheet material that obtains same size according to expressing technique processing; The blend High molecular weight polyethylene raw material that add identical flow ability modifying agent are joined in the screw extruder feed bin; Extrude cooling forming through moulding machine barrel, mould, moulding servicing unit, wherein the moulding machine barrel divides 5-7 the district, and temperature is the 150-250 degree.
Compare all bigger improvement aspect wear-resisting, shock-resistant, stretching, surrender, extensibility, thermal deformation with existing extrusion board.
Claims (2)
1. the preparation method of the ultra-thin ultra-high molecular weight polyethylene board of compacting, it is characterized in that step: one, in the High molecular weight polyethylene raw material, adding part by weight is the flow improving agent of 0.3%-0.6%, described flow ability modifying agent be macromolecule wax with or stearic acid; Two, the molding sintering moulding process does, hot pressing pressure is 14-17MPa, and temperature is 180-230 ℃, and the time is 60-120 minute; The pressure of colding pressing is 20-24Mpa, and temperature is 50-80 ℃, and the time is 180-240 minute.
2. the preparation method of the ultra-thin ultra-high molecular weight polyethylene board of compacting according to claim 1; It is characterized in that step: one, in the High molecular weight polyethylene raw material, add part by weight and be 0.5% flow improving agent, described flow ability modifying agent is 0.3% macromolecule wax and 0.2% stearic acid; Two, the molding sintering moulding process does, hot pressing pressure is 15MPa, and temperature is 200 ℃, and the time is 90 minutes; The pressure of colding pressing is 22Mpa, and temperature is 65 ℃, and the time is 210 minutes.
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| CN2012100901210A CN102632616A (en) | 2012-03-30 | 2012-03-30 | Preparation method for pressing ultra-thin polyethylene plate with ultrahigh molecular weight |
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| CN2012100901210A CN102632616A (en) | 2012-03-30 | 2012-03-30 | Preparation method for pressing ultra-thin polyethylene plate with ultrahigh molecular weight |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867079A (en) * | 2017-03-11 | 2017-06-20 | 苏州中隆机电配件有限公司 | A kind of improved composition of ultra-high molecular weight polyethylene and its preparation method and application |
| CN110370520A (en) * | 2019-06-05 | 2019-10-25 | 江苏明珠硅橡胶材料有限公司 | A kind of ultra-high molecular weight polyethylene board production method |
| US10933593B2 (en) | 2017-09-01 | 2021-03-02 | Celanese Sales Germany Gmbh | Sintered and porous articles having improved flexural strength |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235170A (en) * | 2007-02-01 | 2008-08-06 | 上海化工研究院天地科技发展有限公司 | High-temperature resisting superhigh molecular weight polythene ternary system composite material and preparation method thereof |
| CN101319069A (en) * | 2008-07-16 | 2008-12-10 | 王好占 | Deflection-proof friction disk of ultrahigh molecular weight polyethylene material and preparation method thereof |
-
2012
- 2012-03-30 CN CN2012100901210A patent/CN102632616A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235170A (en) * | 2007-02-01 | 2008-08-06 | 上海化工研究院天地科技发展有限公司 | High-temperature resisting superhigh molecular weight polythene ternary system composite material and preparation method thereof |
| CN101319069A (en) * | 2008-07-16 | 2008-12-10 | 王好占 | Deflection-proof friction disk of ultrahigh molecular weight polyethylene material and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867079A (en) * | 2017-03-11 | 2017-06-20 | 苏州中隆机电配件有限公司 | A kind of improved composition of ultra-high molecular weight polyethylene and its preparation method and application |
| US10933593B2 (en) | 2017-09-01 | 2021-03-02 | Celanese Sales Germany Gmbh | Sintered and porous articles having improved flexural strength |
| CN110370520A (en) * | 2019-06-05 | 2019-10-25 | 江苏明珠硅橡胶材料有限公司 | A kind of ultra-high molecular weight polyethylene board production method |
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Application publication date: 20120815 |