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Hydrolysis and polyurethane explained - A common problem with safety shoe

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  • China TM3171 Oil Acid resistant TPU sole industrial safety shoes with composite toe manufacturer

    TM3171 Oil Acid resistant TPU sole industrial safety shoes with composite toe

    1. Materials: Embossed cow leather upper, PU/ TPU,  Soft mesh fabric
    2. Size: 36-46
    3. Toe cap & mid sole: Composite toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ chemical/ petrol/ impact/ puncture resistant, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3170 Black steel toe labour winter safety shoes for men construction manufacturer

    TM3170 Black steel toe labour winter safety shoes for men construction

    1. Materials: Embossed cow leather upper, PU dual density sole, fur lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & steel mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ impact/ puncture resistant, keep warm, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3169 Anti-slippy steel toe puncture-proof sport safety shoes for logistics manufacturer

    TM3169 Anti-slippy steel toe puncture-proof sport safety shoes for logistics

    1. Materials: Suede leather & fabric upper, PU single density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, breathable, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3168 Microfiber leather steel toe industrial safety shoes sport for men manufacturer

    TM3168 Microfiber leather steel toe industrial safety shoes sport for men

    1. Materials: Microfiber leather upper, PU dual density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, breathable, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3167 Anti slip rubber sole steel toe sport safety shoes for women manufacturer

    TM3167 Anti slip rubber sole steel toe sport safety shoes for women

    1. Materials: Suede leather & fabric upper, rubber sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3166 anti slip prevent puncture composite toe safety shoes airport manufacturer

    TM3166 anti slip prevent puncture composite toe safety shoes airport

    1. Materials: Suede leather upper, PU dual density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Composite toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, metal free, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3165 Air cushioned anti puncture light weight safety sneakers with steel toe manufacturer

    TM3165 Air cushioned anti puncture light weight safety sneakers with steel toe

    1. Materials: 3D fly knit fabric upper, PU dual density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, breathable, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton.
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM3164 Non-slip PU sole anti puncture steel toe work safety shoes for men manufacturer

    TM3164 Non-slip PU sole anti puncture steel toe work safety shoes for men

    1. Materials: Leather & fabric upper, PU single density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, breathable, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM267B Anti-skid light weight steel toe sport safety shoes work for men manufacturer

    TM267B Anti-skid light weight steel toe sport safety shoes work for men

    1. Materials: PU nubuck leather upper, PU single density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, breathable, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

  • China TM267G Light weight prevent puncture steel toe sport safety shoes men work manufacturer

    TM267G Light weight prevent puncture steel toe sport safety shoes men work

    1. Materials: PU nubuck leather upper, PU single density sole, air mesh fabric lining
    2. Size: 36-46
    3. Toe cap & mid sole: Steel toe cap & aramid fiber mid-sole
    4. Standard: CE EN ISO 20345:2022 SB-P SRC or others
    5. Function: Slip/ oil/ petrol/ chemical/ impact/ puncture resistant, breathable, shock absorption
    6. Package: 1 pair per color box,10 pairs per carton
    7. Sample Time: 7 days
    8. Order Lead Time: 45 days after receiving the deposit

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News

Hydrolysis and polyurethane explained - A common problem with safety shoe

2022-01-06 13:53:32
Tiger master is safety shoesmanufacturer in china. We have more than 15 years of experience of exporting many different styles ofsafety shoes to foreign market. Our safety shoes are built with good performance and work safety protection. There is a common problem with safety shoes. It is hydrolysis. Now we will explain hodrolysis and polyurethane for you.

Many of our shoes have the soles attached to the uppers by a process where 2 materials are brought together in a mould, the resultant chemical reaction forms polyurethane (PU). the use of polyurethane makes a lightweight flexible sole which is not only shock absorbent but also extremely hard wearing, that's why polyurethane is ideal for shoes.

One of the main technical challenges with polyurethane is overcoming an ageing deterioration known as ‘hydrolysis’. Hydrolysis is the chemical breakdown of the PU polymer and the resulting physical breakdown or crumbling of the PU sole by the attack of water (usually in vapour form), occurring over a period of several years (even when the shoes are in store!).

This process is accelerated by warmth and high humidity. It will, therefore, happen more quickly in tropical climates, but also in confined spaces (such as lockers) if the safety shoes are put away damp. In the most advanced state of hydrolysis, the PU sole will lose all its physical strength, thus cracking or crumbling.

The Tiger Master PU sole has been improved to increase the resistance against hydrolysis and performs better than any average safety shoe.

There are 2 types of PU soles. There is a Polyether based PU sole and a Polyester based PU sole. Polyether based PU soles have a high resistance against hydrolysis and low oil resistance. Polyester based PU soles have a low resistance against hydrolysis and high oil resistance.

Safety shoes are always using a polyester based PU sole. The basic PU sole used in most safety shoes on the market lasts for 1.5 year in tropical conditions and 3 years in normal conditions.

The Tiger Master PU sole, upgraded with improved resistance against hydrolysis, lasts for 3 years in tropical conditions and 6 years in normal conditions.

Hydrolysis Safety Shoes:


Do you have any questions about hydrolysis or crumbling shoe soles?

Don’t hesitate to contact us right away. Tiger master is professional!