【Popular Science on Polymers and Materials】--003 Plastic Slippers + zdl1966
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This post was last edited by ljtjbx on 11/7/2015 at 10:56. In our daily lives, we come into contact with numerous plastic products; it can be said that our daily existence is inseparable from plastic products. Plastic products are divided into new plastic products and recycled plastic products. The internal quality of recycled plastic products is of course not as good as that of new plastic products, as there are always some defects. For example, many of the plastic slippers we use in summer are made from recycled plastic, or contain some recycled plastic (with the proportion varying depending on the case). In terms of the appearance of the finished product, its color is relatively dull and not very vibrant ； It feels a bit astringent to the touch, not very smooth. It has a bit of an off odor; it’s not pure (someone in the industry can tell) ； It feels a bit heavy in weight. During use, if it is placed in water, the buoyancy is not strong; it gives the impression of sinking, and it may even sink straight down ； The surface will turn black and cannot be cleaned off ； Prone to cracking, wear, and lacks toughness. However, plastic products can be recycled; they are considered renewable resources. Making the most of them by fully utilizing their utility and reducing resource consumption is an inevitable trend.
The last edit to this post was made by ljtjbx on 2015-11-7 at 11:01. Things to keep in mind when choosing plastic slippers: When selecting plastic slippers, we tend to prefer those that are softer. As a result, many merchants tried various ways to make slippers softer. They usually soak slippers in special chemical agents, but because the cleaning is not thorough enough, wearing such slippers can easily cause skin allergies, itching, and other symptoms. Moreover, some low-quality, inexpensive slippers are made from industrial waste rubber and plastics or from plastics produced from recycled materials; they contain large amounts of sulfur and aniline compounds, and long-term exposure to them can be harmful to health. Therefore, people who often wear rubber or plastic slippers may experience symptoms such as red patches, rashes, and itching on their feet, in mild cases ； In more severe cases, local edema, blisters, infection, and other complications may occur. Air-cushion sports shoes are mainly composed of shoelaces, upper fabric, upper synthetic leather, insoles, air-cushion rubber material, sole rubber material, sole hard rubber, and the air-cushion design. The insoles are made of a special material with high rebound properties, which can effectively absorb part of the reaction force, reducing the strain on the feet and making wearing them more comfortable ； The airbag rubber compound is used to retain the air inside the air cushion, provide elasticity, and reduce vibrations during movement ； The air cushion design is intended to reduce the shock caused by the impact between the ankle and the ground while walking, providing additional shock absorption and support. However, many experts believe that although air-cushioned shoes are beneficial for sports that involve bouncing, they are too soft, resulting in poor stability upon landing and an increased risk of ankle sprains. Furthermore, shoes with excessively high air-cushion soles can cause foot problems such as hallux valgus and flat feet ； As height increases, the stress on the lumbar and cervical vertebrae becomes greater, leading to chronic damage that ultimately results in back pain and cervical spondylosis. Your colleague said that, probably after reading about some plastic slippers of poor quality that contain substances harmful to the human body; men who wear them for a long time may see their sperm quality affected. Or maybe she thinks walking in slippers is unstable, so she’s reminding you? Choose slippers of better quality; prioritize quality first, and opt for those with non-slip soles that are not too high to ensure safety. That way, there’s nothing to worry about!
Very useful post; I’ve learned something from it – I’ll be more careful from now on!
The slippers in supermarkets all have a raw smell; the cheaper ones are the larger. This reminds me of the wooden clogs I wore as a child – they were made from a piece of hard, rough wood shaped to resemble shoes, with patterns carved on the bottom surface to prevent slipping. Rubber strips were used at the front to secure them on both sides, and when walking on stone paths, they made a clicking sound
I don’t know what’s wrong with these slippers of mine; I usually change into them when I get to the office. I’ve been wearing it for 10 and a half years now; aside from the fact that it’s difficult to clean, its quality is quite good. Bought from a street vendor.
It seems you bought an authentic product from a street vendor; nothing has gone wrong over these years, and the toxicity has basically dissipated. Another few decades should be no problem.
It’s just a change of office; it’s the place where I work, and there’s no water that could get spilled there.
Well, generally plastic products have an odor at first; it’s just a matter of intensity. Over time, the odors caused by volatile substances and additive migration in the product gradually disappear, meaning that the toxic period has passed. But problems such as aging and cracking often arise as a result.
I suspect my pair is made of tires; it’s too sturdy.
Ha, it mainly depends on your usage environment. Rather than how good the slippers themselves are in quality.
Then wear slippers – where do you think you’re going?