Plastics are molded by use of many methods such as injection molding, extraction molding, blow moiding, vacuum forming and so on. But it is difficult to avoid by-production of plastic scraps in any method. One of the cost-effective way is to regenerate these plastic scraps and put them to practical use. However, regeneration is influenced by the kind of plastics, molding method, required quality of the products etc, so we can not treat the matter in unified way. Properties of the regenerated plastic materials used for watch movement parts are investigated and discussed in the present paper.
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