F.A.Q.

Frequently Asked Questions



1. What is the life span of an industrial shoe?
2. Why does the outsole of my safety shoe rack, chip off and pulverize?
3. Are safety shoes with polyutherane outsoles safe to use?
4. What is the difference between welt and direct injection shoe construction?
5. Does water seep inside welt constructed shoes?
6. Are safety shoe classes international standards?

1. What is the life span of an industrial shoe?

Wear and tear periods may vary and is dependent on the attitude of the wearer and the working area conditions plus the quality of the shoe. On the average, it should last at least one year in normal factory conditions and at least six months in rugged conditions like construction and mining.
To maximize the life span, the shouls should have the right specifications for the right working condition. No single shoe specification can adapt to all the industrial working area conditions.


2. Why does the outsole of my safety shoe rack, chip off and pulverize?

You are probably using a shoe with polyutherane (PU) soles. PU is a thermoplastic rubber or what we may call as an alloy of a rubber with a plastic. It is the same material that is used for some of your casual and atheletic shoes.
Cracking, chipping, and pulverizing is a characteristic and inherent to the material which would take a long time to explain technically. You may just have an old or new atheletic shoe or safety shoe with PU soles which you can check.


3. Are safety shoes with polyutherane outsoles safe to use?

Polyutherane has been used for safety shoes for quite some time. It has its own advantages like being lightweight since it has a lower density than most rubber compounds and it is generally simpler and cheaper to process.
Safety shoe users should just consider some points when decising which outsole specifications to use. If you use shoe with outsoles that crack while in use, it will definitely be hazardous to the wearer since it may cause slipping and exposure to chemicals. Another point is that PU outsoles being thermoplastic cannot be used where high temperatures are involved. PU outsoles will melt during conditions with extreme heat like fires where most floors will heat up. The wearer will have difficulty walking or running in fire emergencies with melted shoe outsoles.


4. What is the difference between welt and direct injection shoe construction?

Shoe construction is the process by which the shoe is manufactured or assembled.
Welt is basically with stitches. The processed outsole is cemented and then heavily stitched to the leather uppers. This process makes the shoe doubly durable for industrial purposes. Types of welts maybe Goodyear welt or Norwegian Welt.
Direct injection involves rubber being injected to the outsole molds with the leather uppers adhering to the outsole as the rubber cools and hardens.


5. Does water seep inside welt constructed shoes?

If it is just surface water then there is no problem. If it is flooded water, the stitches are not the problem, The leather will be saturated with water and later on allow water to pass through. Use rubber boots for flooded water.


6. Are safety shoe classes international standards?

Yes, different countries may have their own certifying bodies but each one have their equivalent standard classifications with the other bodies. Point to consider is that the local Certifying Body of a particular country and not a foreign body, certifies the safety standards of all shoes used in the country.