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1. About RIM Method-
- It’s a manufacturing method, in which liquid materials of low molecular weight having more than two sorts of reactivity are mixed by using DCPD(Dicyclopentadiene) raw materials, and next, they are injected into mold, and go through polymerization process in mold. - DCPD(Dicyclopentadiene) is a substance contained in C5 distillation which is obtained as a by-product in the refining process of naphtha, and DCPD, as thermosetting resin, can form a product of a large complicated shape in a short time.

 

2. Characteristics of the RIM Method
1) Lightening: Available for implementation of shaped articles’ lightening with low specific gravity (1.03); fuel efficiency improvement; contribution to reduction in exhaust gas emissions; high assembly efficiency
2)Impact Resistance: Available for intensification of impact resistance without glass fiber reinforcement (It has proper toughness, and it is recovered even if anomalous strength is exerted.)
3) Low temperature characteristic: There are only a few changes in shock resistance strength even at -40℃.
4) High degree of Freedom of Design. – Easy to manufacture large products and complicated shapes with low viscosity materials
5) productivity: RIM Method doesn’t need a releasing agent, and post-cure, and its reaction time is short. (Injection time: 15~20 seconds, cure time: about 60~90 seconds, basic cycle time: 10 min.)
6) corrosion resistance: It won’t get rusty even when paint is peeled off by external shocks 7) Paint Adhesiveness: good paint adhesion

 

3. RIM Molding Mimetic Diagram

4. P_DCPD Material Report