TPR is the most common and popular material for making soles.
But in daily lives, most people don't know whether the soles they wear belong to what we call the TPR material,here I will give some tips to identify them:
In order to have a better understanding of TPR you need to distinguish TPR from other outsole materials, for example PVC,PU or rubber.
1.A lot of people cannot distinguish PVC soles from TPR soles, in fact it's very easy to distinguish one from another, PVC soles are heavier than those of TPR soles when holding in your hands,the elasticity of
TPR soles is better that those of PVC,,the easiest way is :hold the soles vertically and let it drop down naturally,if it can bounce,then you
are sure it must be TPR,,PVC soles are cheaper than those of TPR,,but their quality is poor,they are easy to break in winter,the wear resistance of rubber outsoles is better than those PVC and TPR,,however the rubber outsoles cannot be recycled,and the price is more expensive than those of TPR and PVC,TPR is better than PVC in terms of weathering resistance,softness,and environmental protection,however TPR is more expensive than PVC,PVC is the cheapest among the three,most slippers are made of PVC,If I am asked to make a choice, I will choose none of these three types,I cling to TPU.
2.It is easy to identify the rubber soles, one of its characteristics is that
it has no injection hole.,it is odorous when you smell it with your nose,and the white mass will grow if the storage time is long, the soles marked "RB" mean they are made of rubber,the rubber soles are the most abrasion-resistant among all soles,but comparatively speaking, they are bulky
3.The surface of TR soles are bright,and harder than general TPR soles, and TR has more injection holes than those of TPR,and they are very distinctive.
4.After being hot melted,the TPR granular material is shaped by injection molding, it is commonly used in making casual shoes midsoles, sport soles .
Advantages: easy to be shaped, price is cheap.
Disadvantages:heavy,resisting abrasion,poor softness,poor flexibility,
poor damping capacity.
It is a kind of material which pocessses both the characteristics of rubber and thermoplastics,it has the properties of rubber,and can be processed and recycled like thermoplastics,it can be made into rubber products by means of injection molding,extrusion molding as well as
blow molding with ordinary plastics moulding machine,they are low temperature resistant,wear resistant,antiskid，highly flexible and bent resistant.
Conclusion: anyway as long as you combine the above-mentioned points ,and with daily careful observation and experience,it won't be difficult for you to identify them.