CN1331264A - Process for preparing cross-linked foam polyolefin material - Google Patents
Process for preparing cross-linked foam polyolefin material Download PDFInfo
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- CN1331264A CN1331264A CN 00110602 CN00110602A CN1331264A CN 1331264 A CN1331264 A CN 1331264A CN 00110602 CN00110602 CN 00110602 CN 00110602 A CN00110602 A CN 00110602A CN 1331264 A CN1331264 A CN 1331264A
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- linked foam
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Abstract
A process for preparing the cross-linked foam polyolefin material includes conventionally preparing the foamable polyolefin from polyolefin, cross-linking agent and foaming agent, heating for cross-linking with the cross-linked level of 50-99%, and heating on vibrating table for foaming until the residual foaming agent is less than 5%. Its advantages include 3D uniformity of foaming, simple equipment, and no pollution.
Description
The present invention relates to a kind of production technique of cross-linked foam polyolefin material.
In the prior art, the production of cross-linked foam polyolefin material needs through crosslinked and foam process, elder generation is through radiation crosslinking in crosslinking process, pass through chemically crosslinked again, and the equipment of radiation crosslinking is extremely expensive, and radiation crosslinking exists radiation pollution that human body is had certain harm, and need carry out on air cushion in foam process, and the manufacture difficulty of air cushion is greatly, and equipment is extremely expensive.Also have and adopt the bath of liquid method to foam, the shortcoming of bath of liquid method is that solution consumption is bigger, and contaminate environment and product reclaim difficulty.
The production technique that the purpose of this invention is to provide the cross-linked foam polyolefin material that a kind of technology is simple, equipment manufacturing cost is cheap.
The object of the present invention is achieved like this: a kind of production technique of cross-linked foam polyolefin material, adopt following step successively:
The production technique of cross-linked foam polyolefin material adopts following step successively: (1), with polyolefine, linking agent, whipping agent is made expandable polyolefine material, A, with polyethylene (LDPE), linking agent (dicumyl peroxide DCP) whipping agent (Cellmic C 121 AC), dispersion agent (whiteruss) is by weight 100: 1-3: 2-15: the 0.2-1 ratio is through the mixer thorough mixing, mixing time is 5-10 minute B, well-mixed raw material (is comprised forcing machine through extruding unit, squeeze die, winders etc.) squeeze sheet and obtain the expandability sheet material, extrusion temperature is controlled between 120-150 ℃.(2), with the above-mentioned expandable polyolefine material heating that makes, carry out crosslinked, temperature is controlled between 140-190 ℃, time is 2-10 minute, cause linking agent to decompose substantially, crosslinking degree is reached more than 50%, save radiation crosslinking technology, (3) above-mentioned sheet material after crosslinked is delivered to shaking table in vibration work, continuation is heated to sheet material decomposition temperature 170-220 ℃ of whipping agent, time is to cause whipping agent fully to decompose in 2-8 minute, makes its residual quantity less than 10% of whipping agent input amount, promptly makes the crosslinking polyolefin foaming sheet material and promptly makes cross-linked foam polyolefin material.
The present invention once used one section non-vibrating platform in the frothing test process, fritter sheet material foaming degree is better as a result, the bulk sheet material is after " expansion ", on the length and width direction, extend and be obstructed, foaming back sheet material is got together as Bo Wenwa or Rhinoceros Hide, can't use, for making its expansion, it is crosslinked to adopt bath of liquid method and air cushion process sheet material also will carry out before foaming, makes polyethylene atom chain-like structure become reticulated structure.The bath of liquid method is that sheet material is placed in the heated liquid, comparatively simple, adopting hundreds of materials such as inorganics, organism, liquid, solid to test does not all have " success ", and major cause is the pollution sheet material that has, the price that has is too high, and what have can't recycling.Air cushion process is to form an air cushion below the sheet material of foaming, but form comparatively difficulty of a steady air cushion, sheet material can constantly move again in the above, this Processes and apparatus manufacturing is difficulty comparatively, it is crosslinked to allow sheet material carry out on a conveying belt, on some parallel shafts, move, so both can solve the problem that the length and width both direction extends, can solve crosslinked back sheet material again and what be met, but, decide along with sheet material working direction speed because each parallel shafts rotating speed is different with regard to sticking and so on problem, be difficult to speed governing to synchronously, and sheet material intensity when foaming is extremely low, is easy to elongate, factors such as fracture are so the continuous industry production of trouble free ground realizes not too easily.The present invention adopts the principle of vibration to guarantee that the cross-linked polyolefin material all can more freely stretch at three-dimensional when foaming, save the highly difficult Processes and apparatus of making air cushion, with extremely simple shaking table as foaming platform, make equipment manufacturing cost extremely cheap,, only need more than 200 ten thousand yuan not as good as 1/10th of Korea S's equipment manufacturing cost, the present invention has overcome the available technology adopting radiation crosslinking in addition and chemically crosslinked mixes crosslinked technology, only adopt chemically crosslinked, its technology is simple, radiationless pollution.
Be described in detail technical solution of the present invention below.
Embodiment 1:
The production technique of cross-linked foam polyolefin material adopts following step successively: (1), polyolefine, linking agent, whipping agent are made expandable polyolefine material, A, with polyethylene (LDPE), linking agent (dicumyl peroxide DCP), whipping agent (Cellmic C 121 AC), dispersion agent (whiteruss) by weight 100: 1: 2: 0.2 ratio is through the mixer thorough mixing, and mixing time is 5-10 minute.B, carry out granulation with granulation unit (90 forcing machines, granulation mould, stock cutter etc.), prilling temperature can be controlled between 120-140 ℃ according to the difference of selected raw material.Good as squeezing sheet machine performance, raw material energy thorough mixing can omit this step.C, the grain that will make obtain the expandability sheet material through extruding the crowded sheet of unit (comprise forcing machine, squeeze die, winder etc.), and extrusion temperature is controlled between 120-150 ℃.(2), with the above-mentioned expandable polyolefine material heating that makes, carry out crosslinkedly, temperature is controlled between 140-190 ℃, the time is 2-6 minute, causes linking agent to decompose substantially, and crosslinking degree is reached more than 50%, saves radiation crosslinking technology.(3) above-mentioned sheet material after crosslinked is delivered to shaking table in vibration work, continuation is heated to sheet material decomposition temperature 170-220 ℃ of whipping agent, time is to cause whipping agent fully to decompose in 2-4 minute, make its residual quantity less than 10% of whipping agent input amount, promptly make the crosslinking polyolefin foaming sheet material and promptly make cross-linked foam polyolefin material.
Embodiment 2:
The production technique of cross-linked foam polyolefin material adopts following step successively: (1), the expandable polyolefine material that polyolefine, linking agent, whipping agent are made, A, with polyethylene (LDPE), linking agent (dicumyl peroxide DCP) whipping agent (Cellmic C 121 AC), dispersion agent (whiteruss) by weight 100: 3: 15: 1 ratio is through the mixer thorough mixing, and mixing time is 5-10 minute.B, well-mixed raw material is squeezed sheet and obtains the expandability sheet material through extruding unit (comprise forcing machine, squeeze die, winder etc.), extrusion temperature is controlled between 120-150 ℃.(2), with the above-mentioned expandable polyolefine material heating that makes, temperature is controlled at 150-190 ℃ and carries out crosslinkedly, the time is 2-8 minute, causes linking agent fully to decompose, and its crosslinking degree is reached more than 75%, saves radiation crosslinking technology.(3) above-mentioned sheet material after crosslinked is delivered to shaking table in vibration work, continuation is heated to decomposition temperature 170-220 ℃ of whipping agent with sheet material, and the time is 2-6 minute, causes whipping agent fully to decompose, make its residual quantity less than 5% of whipping agent input amount, promptly make cross-linked foam polyolefin material.
Embodiment 3:
The production technique of cross-linked foam polyolefin material adopts following step successively: (1); with polyolefine; linking agent; the expandable polyolefine material that whipping agent is made; A; with polyethylene (LDPE); linking agent (dicumyl peroxide DCP) whipping agent (Cellmic C 121 AC); dispersion agent (whiteruss) was by weight 100: 2: 9: 0.5 ratio is through the mixer thorough mixing; mixing time is 5-10 minute B; with granulation unit (90 forcing machines; the granulation mould; stock cutter etc.) carry out granulation; prilling temperature can be controlled in C between 120-140 ℃ according to the difference of selected raw material; the grain of making (is comprised forcing machine through extruding unit; squeeze die; winder etc.) squeeze sheet and obtain the expandability sheet material; extrusion temperature is controlled at (2) between 120-150 ℃; with the above-mentioned expandable polyolefine material heating that makes; carry out crosslinked; temperature is controlled between 140-190 ℃; time is 2-10 minute; cause linking agent to decompose fully; its crosslinking degree is reached more than 99%; save radiation crosslinking technology; (3) above-mentioned sheet material after crosslinked is delivered to shaking table in vibration work; continuation is heated to sheet material decomposition temperature 170-220 ℃ of whipping agent; time is 2-8 minute; cause whipping agent to decompose fully; make its residual quantity less than 1% of whipping agent input amount, promptly make cross-linked foam polyolefin material.
Claims (1)
1, a kind of production technique of cross-linked foam polyolefin material is characterized in that adopting successively following step:
The production technique of cross-linked foam polyolefin material adopts following step successively: (1), with polyolefine, linking agent, whipping agent is made expandable polyolefine material, A, with polyethylene (LDPE), linking agent (dicumyl peroxide DCP) whipping agent (Cellmic C 121 AC), dispersion agent (whiteruss) is by weight 100: 1-3: 2-15: the 0.2-1 ratio is through the mixer thorough mixing, mixing time is 5-10 minute B, well-mixed raw material (is comprised forcing machine through extruding unit, squeeze die, winders etc.) squeeze sheet and obtain the expandability sheet material, extrusion temperature is controlled between 120-150 ℃.(2), with the above-mentioned expandable polyolefine material heating that makes, carry out crosslinked, temperature is controlled between 140-190 ℃, time is 2-10 minute, cause linking agent to decompose substantially, crosslinking degree is reached more than 50%, save radiation crosslinking technology, (3) above-mentioned sheet material after crosslinked is delivered to shaking table in vibration work, continuation is heated to sheet material decomposition temperature 170-220 ℃ of whipping agent, time is to cause whipping agent fully to decompose in 2-8 minute, makes its residual quantity less than 10% of whipping agent input amount, promptly makes the crosslinking polyolefin foaming sheet material and promptly makes cross-linked foam polyolefin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110602 CN1331264A (en) | 2000-07-03 | 2000-07-03 | Process for preparing cross-linked foam polyolefin material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110602 CN1331264A (en) | 2000-07-03 | 2000-07-03 | Process for preparing cross-linked foam polyolefin material |
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| Publication Number | Publication Date |
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| CN1331264A true CN1331264A (en) | 2002-01-16 |
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| CN 00110602 Pending CN1331264A (en) | 2000-07-03 | 2000-07-03 | Process for preparing cross-linked foam polyolefin material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924777A (en) * | 2012-10-24 | 2013-02-13 | 青岛鑫三鸿塑胶制品有限公司 | High-pressure polyethylene foam material and continuous foaming process thereof |
| WO2017096560A1 (en) * | 2015-12-09 | 2017-06-15 | 季国平 | Method for manufacturing polyolefin foam |
-
2000
- 2000-07-03 CN CN 00110602 patent/CN1331264A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924777A (en) * | 2012-10-24 | 2013-02-13 | 青岛鑫三鸿塑胶制品有限公司 | High-pressure polyethylene foam material and continuous foaming process thereof |
| WO2017096560A1 (en) * | 2015-12-09 | 2017-06-15 | 季国平 | Method for manufacturing polyolefin foam |
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