CN87102375A - 合成橡胶碎片的输送方法 - Google Patents
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- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G51/00—Conveying articles through pipes or tubes by fluid flow or pressure; Conveying articles over a flat surface, e.g. the base of a trough, by jets located in the surface
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/124—Treatment for improving the free-flowing characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2321/00—Characterised by the use of unspecified rubbers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S241/00—Solid material comminution or disintegration
- Y10S241/31—Rubber preparation
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Abstract
在用管道或用传送机输送合成橡胶的碎片时,按合成橡胶碎片的重量计算,将2%—50%(重量)的160℃或低于160℃的蒸汽,水或者将160℃或之下的蒸汽和水一起加入输送过程中的合成橡胶碎片里。
Description
本发明涉及输送合成橡胶碎片的改进方法。
像聚丁二烯和含丁二烯共聚物橡胶一类的合成橡胶,被广泛地用作改性剂,以改善树脂的冲击强度以及类似的性质。
在市场上合成橡胶一般是以块状包装形式出售的。为了便于使用,通常的做法就是用橡胶切碎机将合成橡胶块切成碎片。然后将碎片溶于一种单体或类似的溶剂中,再将所得溶液进行聚合反应。以耐冲击性聚苯乙烯为例,用橡胶切碎机,将含丁二烯的均聚型或共聚型橡胶块切成碎片,然后将碎片溶于苯乙烯单体中,以配备在苯乙烯单体中的橡胶溶液。然后将该橡胶溶液聚合,即可获得具有改进冲击强度的耐冲击性聚苯乙烯树脂。
在将合成橡胶碎片溶于一种单体或类似的溶剂时,从橡胶切碎机以及类似设备切出来的合成橡胶碎片,通常用气动输送或用传送带的方法进行连续输送,然后将其加入贮于混合罐或类似设备中的单体。
由于合成橡胶很粘,在输送过程中合成橡胶碎片往往粘到管道或传送带上。如果连续操作而不除去所粘的碎片,则会引起越来越多的碎片粘着,以致操作不能再连续进行。此外,要用大量的人力和时间来除去所粘着的合成橡胶碎片。
到目前为止,已采用了各种措施,以便减少合成橡胶碎片在输送过程中的粘着问题。
例如,有人建议将一些粉末如滑石粉或硬脂酸加到合成橡胶碎片中。虽然该方法可有效地减少了合成橡胶碎片的粘着,但带来的缺点就是在最终产品中留有作为杂质的粉末。
众所周知,可将传送带、管道或有关设备进行镜面光洁处理,或涂以特氟隆(TEFLON商标)。就镜面光洁而言,其效果并不是十分明显。TEFLON涂层的确可有效地减少粘着问题,但也带来了产生静电感应的危险。
本发明的一个目的是将合成橡胶碎片在输送过程中在管道或传送带上的粘着减至最低程度,并从而避免除去所粘着的碎片和清除管道或传送带的需要。
本发明的另一个目的是避免在输送过程中将防粘着杂质加入合成橡胶碎片,也防止了静电的产生,从而消除了在将合成橡胶碎片加入有机溶剂后继而引起爆炸的危险。
因此,本发明的一个方面,就是提供一种用管道或传送带输送合成橡胶碎片的方法,此法包括在合成橡胶碎片中加入160℃或低于160℃的蒸汽,水或者将160℃或低于160℃的蒸汽与2%-50%重量的水(按所输送的合成橡胶碎片重量计算)一起加入。当加入160℃或低于160℃的蒸汽以及水时,最好将它们同时加入。合成橡胶碎片最好是通过气动管道来输送。
本文所用的“合成橡胶”一词是指聚合以丁二烯为特征的单体所得到的那些合成橡胶。因此,合成橡胶的具体实例包括聚丁二烯橡胶,共聚型丁苯橡胶,共聚型丁腈橡胶,共聚型乙丙橡胶,共聚型三元乙丙橡胶,氯丁橡胶等等。
在市场上这些橡胶产品通常是以块状形式出售的。当将这些橡胶溶于单体或类似溶剂中时,从容易溶解的角度来看,最好是将橡胶切碎。因此,要用橡胶切碎机将之切成碎片后方予使用。
当将切好的合成橡胶以碎片的形式输送时,加到合成橡胶碎片中的蒸汽温度以160℃或低于160℃为宜,最好是150℃或低于150℃。最好不要使用高于160℃的高温蒸汽,因为热量可使合成橡胶变质。可用水代替蒸汽。当采用水时,必须将水与合成橡胶碎片均匀混合。另一种可行的实施方案是,也可以将蒸汽和水同时或分别加入。
在加入蒸汽和/或水时,一定要将蒸汽和/或水的用量控制在2%-50%(重量)的范围内,而最好是5%-40%(重量)[按所输送的合成橡胶碎片重量计算]。如果蒸汽和/或水的用量少于2%(重量),在很大的程度上,不可能对合成橡胶碎片产生防粘看作用。而高于50%(重量)的任何用量也不会再产生任何额外的作用。相反,会使体系内的水量太高,在有些情况下还会产生反作用。
所加的水不会作为一种杂质混合在由合成橡胶碎片制成的产品中,只要水量控制在上述合适范围内,就对以后的反应例如聚合反应不会产生反作用。
为了输送上述切好的合成橡胶碎片,可以采用气动输送法,用鼓风机风送合成橡胶碎片通过管道。另一种可行方法是,也可以用传送装置例如传送带来传送这些碎片。业已知道,如果用TEFLON涂层与合成橡胶碎片接触的器壁,就会减少合成橡胶碎片的粘着问题。采用TEFLON涂层,也能提高本发明的效果。一般来说,合成橡胶很容易产生静电,当采用TEFLON涂层时,就更进一步地促进了这一趋势。因此,例如在将合成橡胶碎片加入有机溶剂中时,就有发生爆炸的危险性。因此,在处理橡胶时应特别小心。与先有技术的输送法不同,用本发明的方法,在将合成橡胶碎片加入有机溶剂时,即使是用了TEFLON涂层,也不会有爆炸的危险,这是由于加了蒸汽和/或水,使合成橡胶碎片的相对湿度非常高。
根据本发明的方法,在输送过程中,能减少合成橡胶碎片在管道、传送带以及类似设备上粘着的问题,而不会产生在最终产品中引入杂质的问题。因此,在很大的程度上可以减少除去粘着的合成橡胶碎片所需的人力。也能够消除在将合成橡胶碎片加入有机溶剂或类似溶剂中时所可能引起的爆炸危险。
下文将通过各个实例更详细地阐述本发明。但是,应该牢记本发明并不限于下列实例或受其限制。
实施例1:
用RIETZ公司制造的橡胶切碎机,以1000公斤/小时的速率。连续将35公斤一包的聚丁二烯橡胶块“DIENE 55AS”(商品名;Asahi化学工业有限公司产品)切成碎片。用鼓风机将所切成的橡胶碎片,连续风送通过直径为4英寸的不锈钢管道。将该碎片在不断搅拌下加入已装有单体苯乙烯的橡胶溶解槽中。在输送碎片时,将2公斤/厘米2(表压)的蒸汽(大约130℃)与净化水以100公斤/小时的流速,同时并连续地通过鼓风机的进气口加入。与不加蒸汽或水进行的对比操作相比,减少了橡胶碎片在鼓风机和管道内的粘着。因此,使除去粘着橡胶碎片的清理周期延至三个星期。对比操作将于下列对比实例1中说明。在管道出口的相对湿度是100%。将切碎的橡胶溶于苯乙烯,然后聚合成为耐冲击性聚苯乙烯,与不加蒸汽或水进行的类似操作方法比较,在反应和其他设备中没有观察到任何区别。
对比实例1:
除了不加蒸汽和净化水外,用实施例1的相同方法进行操作。发现在鼓风机和管道内有大量的橡胶碎片粘着,以致早在开工后三天就必须清除已粘着的橡胶碎片。
实施例2:
除了用TEFLON涂布输送管道的内壁外,采用实施例1的相同方法进行操作。与实施例1比较,橡胶碎片的粘着已进一步地减少。清除工作也只需两个月进行一次。
实施例3:
将用实施例1的相同方法切好橡胶碎片,用振动传送带输送,然后将其加入橡胶溶解槽里。与此同时,以200公斤/小时的速率将2公斤/厘米2(表压)的净化水喷到橡胶切碎机的出口。与下文将给出的对比实例2进行比较,减少了橡胶碎片的粘着,清除工作也只需一个月进行一次。
对比实例2:
除了不用净化水外,采用实施例1的相同方法进行操作。尤其是在金属表面上发生了大量的橡胶碎片的粘着。清除工作必须每5天进行一次。
Claims (3)
1、用管道或用传送机输送合成橡胶的碎片的方法,其中包括在合成橡胶的碎片里加入160℃或低于160℃的蒸汽,水或者将160℃或低于160℃的蒸汽与2%-50%重量的水(按所输送的合成橡胶碎片重量计算)一起加入。
2、按权利要求1的方法,其中同时加入160℃或低于160℃的蒸汽和水。
3、按权利要求1的方法,其中通过风动管道输送合成橡胶碎片。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP64947/86 | 1986-03-25 | ||
JP61064947A JPS62222926A (ja) | 1986-03-25 | 1986-03-25 | 合成ゴムチツプの輸送方法 |
Publications (2)
Publication Number | Publication Date |
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CN87102375A true CN87102375A (zh) | 1987-10-07 |
CN1010220B CN1010220B (zh) | 1990-10-31 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN87102375A Expired CN1010220B (zh) | 1986-03-25 | 1987-03-25 | 合成橡胶碎片的输送方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US4789272A (zh) |
JP (1) | JPS62222926A (zh) |
KR (1) | KR900001752B1 (zh) |
CN (1) | CN1010220B (zh) |
CS (1) | CS276723B6 (zh) |
IT (1) | IT1202672B (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102229218A (zh) * | 2011-06-03 | 2011-11-02 | 特拓(青岛)轮胎技术有限公司 | 一种自动生胶准备工艺及工艺系统 |
CN103481392A (zh) * | 2013-09-22 | 2014-01-01 | 苏州市湘园特种精细化工有限公司 | 一种橡胶加工方法 |
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JP2647726B2 (ja) * | 1990-04-05 | 1997-08-27 | 株式会社トクヤマ | 粉体の調湿方法 |
US5765728A (en) * | 1995-03-27 | 1998-06-16 | Eastman Kodak Company | Method and apparatus for feeding chopped polyester scrap |
US5902861A (en) * | 1997-06-17 | 1999-05-11 | Megill; Robert W. | Method of making rubber |
US5927620A (en) * | 1997-12-11 | 1999-07-27 | Phaltech Corporation | Activated method for treating crumb rubber particles |
DE19840502C1 (de) * | 1998-09-07 | 2000-03-02 | Waeschle Gmbh | Verfahren zur pneumatischen Förderung von Schüttgütern |
KR20010050170A (ko) * | 1999-08-31 | 2001-06-15 | 조셉 에스. 바이크 | 과립 폴리부타디엔의 벌크 처리 방법 |
JP3632750B2 (ja) * | 2000-06-01 | 2005-03-23 | 信越化学工業株式会社 | 塩化ビニル系樹脂粉体の空気移送方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1880372A (en) * | 1929-10-02 | 1932-10-04 | Rubber Regenerating Co | Process of reclaiming vulcanized rubber fiber products |
US2827505A (en) * | 1952-04-16 | 1958-03-18 | Richardson Co | Method for hard rubber dust production |
US3809436A (en) * | 1972-05-25 | 1974-05-07 | Cpc Eng Corp | Process for conveyance of ash |
JPS5948218A (ja) * | 1982-09-10 | 1984-03-19 | Nissan Shatai Co Ltd | 自動車の空調制御装置 |
JPS60137719A (ja) * | 1983-12-23 | 1985-07-22 | Yokohama Rubber Co Ltd:The | 未加硫ゴム加工工程のサンプリング方法 |
US4625922A (en) * | 1985-01-04 | 1986-12-02 | The Goodyear Tire & Rubber Company | Elevated temperature comminution of vulcanized rubber and other elastomers |
US4714756A (en) * | 1985-10-23 | 1987-12-22 | E. I. Du Pont De Nemours And Company | Process for preparing melt processible tetrafluoroethylene copolymer granules |
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1986
- 1986-03-25 JP JP61064947A patent/JPS62222926A/ja active Pending
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1987
- 1987-03-17 US US07/026,937 patent/US4789272A/en not_active Expired - Lifetime
- 1987-03-23 IT IT19810/87A patent/IT1202672B/it active
- 1987-03-25 KR KR1019870002731A patent/KR900001752B1/ko not_active IP Right Cessation
- 1987-03-25 CS CS872021A patent/CS276723B6/cs not_active IP Right Cessation
- 1987-03-25 CN CN87102375A patent/CN1010220B/zh not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102229218A (zh) * | 2011-06-03 | 2011-11-02 | 特拓(青岛)轮胎技术有限公司 | 一种自动生胶准备工艺及工艺系统 |
CN102229218B (zh) * | 2011-06-03 | 2013-12-18 | 特拓(青岛)轮胎技术有限公司 | 一种自动生胶准备工艺及工艺系统 |
CN103481392A (zh) * | 2013-09-22 | 2014-01-01 | 苏州市湘园特种精细化工有限公司 | 一种橡胶加工方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1010220B (zh) | 1990-10-31 |
JPS62222926A (ja) | 1987-09-30 |
IT1202672B (it) | 1989-02-09 |
CS202187A3 (en) | 1992-03-18 |
KR900001752B1 (ko) | 1990-03-19 |
CS276723B6 (en) | 1992-08-12 |
KR870008767A (ko) | 1987-10-20 |
US4789272A (en) | 1988-12-06 |
IT8719810A0 (it) | 1987-03-23 |
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