CN1370798A - Irradiation crosslinking process of preparing ethylene-vinyl acetate copolymer/linear low-density polyethylene foam plastic - Google Patents
Irradiation crosslinking process of preparing ethylene-vinyl acetate copolymer/linear low-density polyethylene foam plastic Download PDFInfo
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- CN1370798A CN1370798A CN 01107186 CN01107186A CN1370798A CN 1370798 A CN1370798 A CN 1370798A CN 01107186 CN01107186 CN 01107186 CN 01107186 A CN01107186 A CN 01107186A CN 1370798 A CN1370798 A CN 1370798A
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- vinyl acetate
- linear low
- ethylene
- acetate copolymer
- density polyethylene
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Abstract
The present invention relates to an irradiation crosslinking process of preparing ethylene-vinyl acetate copolymer linear low-density polyethylene foamed plastics. Ethylene-vinyl acetate copolymer, linear low-density polyethylene, foaming agent and other assistants are mixed and the mixture is formed into plate. After being irradiated, ethylene-vinyl acetate copolymer and linear low-density polyethylene are crosslinked to obtain foamed plastic with improved machining performance and apparent density of about 40 Kg/cu.m.
Description
The present invention relates to the method that a kind of cross-linking radiation prepares the ethylene-vinyl acetate copolymer/linear low-density polyethylene porous plastics, belong to polymer processing field.
Foamed polyolefine plastic has been inherited starting material softness, tough and tensile, rub resistance, and the advantage of good shock-resistance, thermal insulation, electrical insulating property is arranged.In addition, most of foamed polyolefine plastics are unicellular structure, are suitable as floating material.In order to improve the stability of the course of processing, improve the performance of crosslinked plastic foam, often take the method for chemically crosslinked to carry out modification on the industrial production.Ethylene-vinyl acetate copolymer system is made by two kinds of monomer copolymerizations reactions of ethene and vinyl acetate between to for plastic, and its performance is along with how much vinyl acetate content is very different.Vinyl acetate content can be used for making the porous plastics of high magnification, separated foam type at the ethylene-vinyl acetate copolymer of 12%-16%, industrial also normal employing ethylene-vinyl acetate copolymer and polyethylene carry out blending and modifying, the porous plastics that preparation has superperformance.Up to now, the domestic and foreign literature report mostly is to be equipped with porous plastics to formulate after ethylene-vinyl acetate copolymer and the new LDPE (film grade) blend, the research that Shang Weijian adopts cross-linking radiation to prepare ethylene-vinyl acetate copolymer/linear low-density polyethylene co-mixing system porous plastics is foamed in not crosslinked or employing chemically crosslinked.
The objective of the invention is provides a kind of cross-linking radiation to prepare the method for ethylene-vinyl acetate copolymer/linear low-density polyethylene porous plastics at the deficiencies in the prior art, be characterized in adopting irradiation technique to make ethylene-vinyl acetate copolymer/linear low-density polyethylene crosslinked, foaming makes the porous plastics of excellent property.
Purpose of the present invention is realized that by following technical measures wherein said raw material umber is parts by weight except that specified otherwise.
1. ethylene-vinyl acetate copolymer/linear low-density polyethylene preparation of plates
With 10～90 parts of ethylene-vinyl acetate copolymers and 90～10 parts of linear low density polyethylenes, 10～25 parts of whipping agents, 2～5 parts of promotor, adopt Banbury mixer to plasticate, plasticating temperature is 110～130 ℃, adopt the vulcanizing press compression molding to be shaped to sheet material then, molding temperature is 130～145 ℃.
2. the cross-linking radiation of ethylene-vinyl acetate copolymer/linear low-density polyethylene sheet material
At room temperature carry out irradiation in the air, irradiation dose is 30～80kGy, makes ethylene-vinyl acetate copolymer/linear low-density polyethylene sheet material generation crosslinking reaction.
3. the foaming of cross-linking radiation ethylene-vinyl acetate copolymer/linear low-density polyethylene sheet material
Adopt self-control glycerol bath device to foam, oil bath temperature is 170～210 ℃, and foamed time is 1～7 minute.
Whipping agent is that Cellmic C 121, diisopropyl azodiformate and/or 4,4 ｀-oxygen two benzol sulfohydrazides are at least a.
Promotor is that zinc oxide, Zinic stearas, stearic acid, lead stearate and/or Cadmium oxide are at least a.
Experimental result shows that cross-linking radiation prepares the ethylene-vinyl acetate copolymer/linear low-density polyethylene porous plastics and has smooth surface, and color and luster is pure white, and micropore is meticulous evenly, and abscess is a unicellular structure, and the good advantage of over-all properties, sees table 1 for details.
The present invention has following advantage:
Technology is simple, cleaning, pollution-free, and cost is lower.The porous plastics that makes has good performance, can be used for job contract industry, construction industry, water industry aspect, as insulation, shockproof, packing material.
Embodiment:
Below by embodiment the present invention is specifically described; be necessary to be pointed out that at this following examples only are used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment to the present invention according to the content of the invention described above.
1. with 0.5 kilogram of 90 kilograms of ethylene-vinyl acetate copolymers (vinyl acetate content 14%) and 10 kilograms of linear low density polyethylenes, 20 kilograms of Cellmic C 121s, 2 kilograms in zinc oxide and Zinic stearas, adopt Banbury mixer to plasticate, plasticating temperature is 110 ℃, adopt the vulcanizing press compression molding to be shaped to sheet material then, molding temperature is 130 ℃.Adopt JJ-2 type electron electrostatic accelerator, at room temperature carry out irradiation in the air, irradiation dose is 50kGy.Adopt self-control glycerol bath device to foam, oil bath temperature is 200 ℃, and foamed time is 2 minutes.
2. with 0.6 kilogram of 50 kilograms of ethylene-vinyl acetate copolymers (vinyl acetate content 14%) and 50 kilograms of linear low density polyethylenes, 15 kilograms of diisopropyl azodiformates, 1.5 kilograms in zinc oxide and stearic acid, adopt Banbury mixer to plasticate, plasticating temperature is 120 ℃, adopt the vulcanizing press compression molding to be shaped to sheet material then, molding temperature is 135 ℃.Adopt JJ-2 type electron electrostatic accelerator, at room temperature carry out irradiation in the air, irradiation dose is 60kGy.Adopt self-control glycerol bath device to foam, oil bath temperature is 180 ℃, and foamed time is 5 minutes.
3. with 10 kilograms of 50 kilograms of ethylene-vinyl acetate copolymers (vinyl acetate content 14%) and 50 kilograms of linear low density polyethylenes, Cellmic C 121s, 4,0.6 kilogram of 4 ｀-10 kilograms of oxygen two benzol sulfohydrazides, 1.5 kilograms in zinc oxide and lead stearate, adopt Banbury mixer to plasticate, plasticating temperature is 115 ℃, adopt the vulcanizing press compression molding to be shaped to sheet material then, molding temperature is 130 ℃.Adopt JJ-2 type electron electrostatic accelerator, at room temperature carry out irradiation in the air, irradiation dose is 30kGy.Adopt self-control glycerol bath device to foam, oil bath temperature is 190 ℃, and foamed time is 5 minutes.
The performance of table 1 cross-linking radiation ethylene-vinyl acetate copolymer/linear low-density polyethylene foamed plastics
Irradiation dose apparent density hot strength elongation at break water imbibition sample
(kGy) (kg/m
3) (MPa) (％) (kg/m
2) foamed plastics-1 30 49 0.52 284 0.017 foamed plastics-2 50 37 0.48 168 0.014 foamed plastics-3 60 43 0.52 131 0.065 foamed plastics-4 30 71 0.35 369 0.011
Claims (3)
1. cross-linking radiation prepares the method for ethylene-vinyl acetate copolymer/linear low-density polyethylene porous plastics.It is characterized in that:
A. the preparation of plates of ethylene-vinyl acetate copolymer/linear low-density polyethylene co-mixing system is with 10～90 parts of starting raw material (by weight) ethylene-vinyl acetate copolymers and 90～10 parts of linear low density polyethylenes, 10～25 parts of whipping agents, 2～5 parts of promotor, adopt Banbury mixer to plasticate, plasticating temperature is 110～130 ℃, adopt the vulcanizing press compression molding to be shaped to sheet material then, molding temperature is 130～145 ℃
B. the cross-linking radiation of ethylene-vinyl acetate copolymer/linear low-density polyethylene sheet material at room temperature carries out irradiation in the air, and irradiation dose is 30～80kGy, makes ethylene-vinyl acetate copolymer/linear low-density polyethylene sheet material generation crosslinking reaction,
C. the foaming of cross-linking radiation ethylene-vinyl acetate copolymer/linear low-density polyethylene sheet material adopts self-control glycerol bath device to foam, and oil bath temperature is 170～210 ℃, and foamed time is 1～7 minute.
2. the method for preparing the ethylene-vinyl acetate copolymer/linear low-density polyethylene porous plastics according to the described cross-linking radiation of claim 1, it is characterized in that whipping agent is that Cellmic C 121, diisopropyl azodiformate and/or 4,4 ｀-oxygen two benzol sulfohydrazides are at least a.
3. the method for preparing the ethylene-vinyl acetate copolymer/linear low-density polyethylene porous plastics according to claim 1 or 2 described cross-linking radiations is characterized in that promotor is that zinc oxide, Zinic stearas, stearic acid, lead stearate and/or Cadmium oxide are at least a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107186 CN1370798A (en) | 2001-02-26 | 2001-02-26 | Irradiation crosslinking process of preparing ethylene-vinyl acetate copolymer/linear low-density polyethylene foam plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01107186 CN1370798A (en) | 2001-02-26 | 2001-02-26 | Irradiation crosslinking process of preparing ethylene-vinyl acetate copolymer/linear low-density polyethylene foam plastic |
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| CN1370798A true CN1370798A (en) | 2002-09-25 |
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| CN 01107186 Pending CN1370798A (en) | 2001-02-26 | 2001-02-26 | Irradiation crosslinking process of preparing ethylene-vinyl acetate copolymer/linear low-density polyethylene foam plastic |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305939C (en) * | 2005-08-17 | 2007-03-21 | 威高集团有限公司 | Preparation method and uses of radiation modified polyolefinic thermoplastic elastomer blending resin |
| CN101812161A (en) * | 2010-04-29 | 2010-08-25 | 中国科学院长春应用化学研究所 | Polyethylene bonding resin and preparation method thereof |
| CN101319066B (en) * | 2007-06-10 | 2010-12-08 | 郭廷志 | High-floating force foam material and method of producing the same |
| CN101423632B (en) * | 2007-10-29 | 2011-08-17 | 比亚迪股份有限公司 | Composition for foaming material and foaming material |
| CN102408604A (en) * | 2011-08-29 | 2012-04-11 | 洪惠泉 | Application of high-pressure polyethylene material |
-
2001
- 2001-02-26 CN CN 01107186 patent/CN1370798A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305939C (en) * | 2005-08-17 | 2007-03-21 | 威高集团有限公司 | Preparation method and uses of radiation modified polyolefinic thermoplastic elastomer blending resin |
| CN101319066B (en) * | 2007-06-10 | 2010-12-08 | 郭廷志 | High-floating force foam material and method of producing the same |
| CN101423632B (en) * | 2007-10-29 | 2011-08-17 | 比亚迪股份有限公司 | Composition for foaming material and foaming material |
| CN101812161A (en) * | 2010-04-29 | 2010-08-25 | 中国科学院长春应用化学研究所 | Polyethylene bonding resin and preparation method thereof |
| CN101812161B (en) * | 2010-04-29 | 2011-11-09 | 中国科学院长春应用化学研究所 | Polyethylene bonding resin and preparation method thereof |
| CN102408604A (en) * | 2011-08-29 | 2012-04-11 | 洪惠泉 | Application of high-pressure polyethylene material |
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Free format text: CORRECT INVENTOR; FROM: XU XI; XU WEN; LIU PENGBO; FENG QINGFEN; LUO LIQIN; TO: XU WEN; LIU PENGBO;FENG QINGFEN; LUO LIQIN Effective date: 20010727 |
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Effective date of registration: 20010727 Inventor after: Xu Wen Inventor after: Liu Pengbo Inventor after: Feng Qingfen Inventor after: Luo Liqin Inventor before: Xu Xi Inventor before: Xu Wen Inventor before: Liu Pengbo Inventor before: Feng Qingfen Inventor before: Luo Liqin |
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