Will the weight of safety shoes affect prolonged wear?

1. Direct Relationship Between Weight and Comfort
Studies show that wearers of heavy-duty safety shoes experience significantly higher discomfort scores, especially during delicate handling tasks. Greater weight means higher pressure on the feet, leading to foot fatigue with prolonged wear.

2. Impact on Physiological Load
The "Healthy China Action (2019-2030)" points out that prolonged, high-intensity repetitive work increases physical exertion. Excessively heavy footwear further amplifies fatigue and increases the risk of potential occupational injuries. Therefore, lightweight design is key to reducing the overall workload on workers.

3. The Effect of Weight on Sole Materials
Heavy-duty safety shoes often use thicker soles to enhance protection, but this also increases overall weight. In contrast, lightweight or medium-weight shoes maintain protection while better controlling weight, thus improving comfort during extended wear.

4. Trade-offs in Practical Use

For jobs requiring heavy lifting or working in high-risk environments, moderately increasing shoe weight for better protection is necessary; however, for jobs requiring prolonged standing or walking, lightweight safety shoes should be prioritized to reduce foot fatigue and discomfort.

How well do PVC safety shoes grip wet, muddy, or oily surfaces?

1. Ranking of Relative Grip Performance
Multiple comparative experiments show that PVC > microporous polyurethane (PU) has a better anti-slip coefficient than ordinary PU on dry and oily surfaces.

2. Performance in Wet Environments
In wet or oily conditions, the dynamic coefficient of friction (DCOF) of PVC soles decreases significantly, especially on oily surfaces. In rainy weather or oily workplaces, the anti-slip effect of PVC soles is somewhat weakened.

3. Improvement of Grip Due to Wear
Studies indicate that PVC soles develop a rougher surface texture after artificial wear, thus improving their anti-slip performance. This explains why the grip of PVC soles often improves after a period of use.