材料技术创新：有机硅真空袋重复使用
By www.carbonfiber.com.cn
据英国基德明斯特Bentley创新化学公司（Bentley Creative Chemicals，位于英国Kidderminster）介绍，硅胶袋更耐热和树脂的化学侵蚀，加工过程安全，没有异味，硅胶袋可重复使用。这种可重复使用的硅胶袋比传统的复合材料成型方法更快，更便宜，更环保。该公司估计新工艺能够节省90％的劳动力成本。
图1：工作人员正在手工制作有机硅真空袋
“我们知道这种新硅胶袋体系在目前使用的复合材料成型应用中有很大的潜力，我们期待着与制造商紧密合作，希望他们能够获得效益，”Bentley的理查德沃森说。
Bentley创新化学公司一直与赛车运动队合作来实施此工艺。该车队报道成型复杂复合材料零部件的时间大大缩短了。一家船舶制造商目前正在研究此体系是怎样从生产过程中受益的。
图2：从模具上取下制备好的有机硅真空袋
硅胶由美国的Smooth-On开发，对放置在模具内的型材上喷涂或涂刷这种专用胶，一旦固化，袋子就脱落下来，为真空工艺的使用做准备。
传统真空袋是用聚丙烯生产的，该材料比较昂贵且只能使用一次，既费时又难以使用，Bentley解释说，在模具的表面还留有印痕，因为袋子没有完全被真空抽平。
Bentley创新化学公司（Bentley Creative Chemicals）专门从事有机硅塑料（silicone），聚氨酯（polyurethane），聚酯树脂（polyester resin），和环氧树脂（epoxy）的制造，其产品广泛覆盖各应用领域。
有机硅塑料
英文名称:
Silicone
比重:
1.75-1.95克/立方厘米 成型收缩率:0.5% 成型温度：160-180℃ ；
物料性能：
耐高低温、耐水性好、高频绝缘性好，耐辐射、耐臭氧性好，适于做电工、电子组件及线圈的灌封与固定；
成型性能：
1. 流动性好，硬化速度慢，压缩成型时需要较高的成型温度；
2. 压缩成型后，须经高温固化处理。
Bentley Chemicals says that employing re-useable silicone bags for moulding composites under vacuum is faster, cheaper and 'greener' than the traditional composites moulding methods used for aerospace, automotive and marine components.
According to Bentley Creative Chemicals of Kidderminster, UK, the silicone bags are more resistant to heat and chemical attack from resins, the process is non-hazardous and has no odour, and the bags can be used over and over again with a comparatively long shelf life. The company estimates that the new process is already saving up to 90% of labour costs.
Bentley has been working with a motor racing team to implement the process. The racing team is reported to have been able to dramatically reduce the time taken to mould complex composite parts. A major marine manufacturer is now investigating how the system can benefit its production processes.
The silicone has been developed by Smooth-On in the USA and the bags are created by either spraying or brushing the special silicone onto a composite profile already sitting inside the mould. Once it has cured, the bag is simply peeled away and stored ready for use in the vacuum process.
Traditionally vacuum bags have been made out of polypropylene. The materials are expensive, the bags can only be used once and are time consuming and difficult to apply, explains Bentley. They can also leave marks on the surface of the moulding where the bag has not completely vacuumed flat.
“We know that this new silicone bag system has major potential for many composite moulding applications currently using the vacuum process, and we are looking forward to working closely with fabricators to see them reap the major benefits that it can bring,” says Richard Watson from Bentley.
Bentley Creative Chemicals specialises in silicones, polyurethanes, polyester resins, plasters and epoxies for use across a wide range of sectors.
来源：有机硅材料
据英国基德明斯特Bentley创新化学公司（Bentley Creative Chemicals，位于英国Kidderminster）介绍，硅胶袋更耐热和树脂的化学侵蚀，加工过程安全，没有异味，硅胶袋可重复使用。这种可重复使用的硅胶袋比传统的复合材料成型方法更快，更便宜，更环保。该公司估计新工艺能够节省90％的劳动力成本。
图1：工作人员正在手工制作有机硅真空袋
“我们知道这种新硅胶袋体系在目前使用的复合材料成型应用中有很大的潜力，我们期待着与制造商紧密合作，希望他们能够获得效益，”Bentley的理查德沃森说。
Bentley创新化学公司一直与赛车运动队合作来实施此工艺。该车队报道成型复杂复合材料零部件的时间大大缩短了。一家船舶制造商目前正在研究此体系是怎样从生产过程中受益的。
图2：从模具上取下制备好的有机硅真空袋
硅胶由美国的Smooth-On开发，对放置在模具内的型材上喷涂或涂刷这种专用胶，一旦固化，袋子就脱落下来，为真空工艺的使用做准备。
传统真空袋是用聚丙烯生产的，该材料比较昂贵且只能使用一次，既费时又难以使用，Bentley解释说，在模具的表面还留有印痕，因为袋子没有完全被真空抽平。
Bentley创新化学公司（Bentley Creative Chemicals）专门从事有机硅塑料（silicone），聚氨酯（polyurethane），聚酯树脂（polyester resin），和环氧树脂（epoxy）的制造，其产品广泛覆盖各应用领域。
有机硅塑料
英文名称:
Silicone
比重:
1.75-1.95克/立方厘米 成型收缩率:0.5% 成型温度：160-180℃ ；
物料性能：
耐高低温、耐水性好、高频绝缘性好，耐辐射、耐臭氧性好，适于做电工、电子组件及线圈的灌封与固定；
成型性能：
1. 流动性好，硬化速度慢，压缩成型时需要较高的成型温度；
2. 压缩成型后，须经高温固化处理。
Bentley Chemicals says that employing re-useable silicone bags for moulding composites under vacuum is faster, cheaper and 'greener' than the traditional composites moulding methods used for aerospace, automotive and marine components.
According to Bentley Creative Chemicals of Kidderminster, UK, the silicone bags are more resistant to heat and chemical attack from resins, the process is non-hazardous and has no odour, and the bags can be used over and over again with a comparatively long shelf life. The company estimates that the new process is already saving up to 90% of labour costs.
Bentley has been working with a motor racing team to implement the process. The racing team is reported to have been able to dramatically reduce the time taken to mould complex composite parts. A major marine manufacturer is now investigating how the system can benefit its production processes.
The silicone has been developed by Smooth-On in the USA and the bags are created by either spraying or brushing the special silicone onto a composite profile already sitting inside the mould. Once it has cured, the bag is simply peeled away and stored ready for use in the vacuum process.
Traditionally vacuum bags have been made out of polypropylene. The materials are expensive, the bags can only be used once and are time consuming and difficult to apply, explains Bentley. They can also leave marks on the surface of the moulding where the bag has not completely vacuumed flat.
“We know that this new silicone bag system has major potential for many composite moulding applications currently using the vacuum process, and we are looking forward to working closely with fabricators to see them reap the major benefits that it can bring,” says Richard Watson from Bentley.
Bentley Creative Chemicals specialises in silicones, polyurethanes, polyester resins, plasters and epoxies for use across a wide range of sectors.
来源：有机硅材料
