What material is good for sandal uppers

Sandal uppers are an open type of shoes, which are shoes that can be worn by both men and women by fixing the soles on their feet through straps, columns or arches and ankles. So what material are we choosing for sandal uppers? What is the material of sandal uppers? 1

Plastic, EVA, rubber, choose EVA for sandals, the material is good and light.

Choice:

1. If it is a single material sandal, EVA is more suitable, light and comfortable; Rubber is heavy, but soft and comfortable.

2. It is best to choose composite materials for sandals, with rubber for outsole, foamed EVA for midsole, PU for insole and leather for uppers. Composite materials can be reasonably matched according to different needs, which is more advantageous than single materials.

difference:

1. hardness: plastic >; EVA> Rubber has the opposite elasticity.

2. Aging and deformation: plastic > EVA> Rubber.

3. Taste: EVA> Rubber >: Plastic.

4. Weight: rubber > Plastics > EVA。

EVA soles have high resilience and tensile strength, high toughness, good shock-proof and cushioning properties, excellent thermal insulation, cold resistance and low temperature performance, cold resistance, closed cell structure, good sound insulation effect, no water absorption, moisture resistance, good water resistance, corrosion resistance to chemicals such as seawater, grease, acid and alkali, antibacterial, non-toxic, tasteless and pollution-free.

Common features:

When the content of vinyl acetate in EVA is less than 2%, it can only be used as plastic. EVA has good low temperature resistance, and its thermal decomposition temperature is about 23℃. With the increase of molecular weight, the softening point of EVA increases, and the processability and surface gloss of plastic parts decrease, but the strength increases, and the impact toughness and environmental stress cracking resistance improve. The chemical resistance and oil resistance of EVA are slightly worse than those of PE (polyethylene) and PVC (polyvinyl chloride), and the change is more obvious with the increase of vinyl acetate content. What material is good for sandal uppers? 2

The main materials of uppers are rubber, PU, PVC, MD, TPR, EVA, etc.

1. EVA(E ethylene, VA vinyl acetate): The more vinyl acetate, the better the elasticity.

2. Rubber: it is divided into natural cloth and synthetic cloth, which is wear-resistant, elastic, heavy and costly.

3. TPR(T-heat, p-plastic, r-rubber): It has rubber properties, is wear-resistant and has low cost, but it will slip when it comes into contact with engine oil solvents.

4. PU: It has excellent abrasion resistance and repeated bending performance, good tearing and hunting resistance and elasticity, and excellent oil resistance, acid resistance, alkali resistance and low temperature resistance. The waste PU bottom can be automatically degraded, which is beneficial to environmental protection and is more suitable for platform shoes, which requires impact resistance and durability; However, there are some problems such as yellowing, hydrolysis, cracking, easy to open glue, etc. Air cushion shoes and football shoes are commonly used materials.

5. PVC: synthetic resin, with a middle cushion and a bottom, which is seldom used due to ecological and environmental problems. It is a common material for air cushion shoes and football shoes.

6. MD (Huailongdi): EVA is formed by one-time foaming, which has good softness, high elasticity and good thermal insulation performance, but the wear resistance is poor. Generally, high-top shoes are more suitable.

7. Ejector plate: also known as outsole bracket, which has super-support, anti-distortion and shock absorption functions. Generally, it can be divided into three types:

A, carbon fiber injection sheet: high hardness and density.

B, material ejection sheet: it is a relatively soft material.

C, micro-injection PVC: generally used for making small LOGO trademarks.

Choose sandals, focusing on these five points

1. Front and rear-front head and rear support.

Children like to jump up and down, and their toes are fragile. At ordinary times, pebbles, sharp sand and even glass may hurt their toes, so the shoes with front toe caps will be more suitable for them. Older children or adults can wear open-toed sandals.

there must be a support at the back (not the style of slippers). First of all, this affects the heel and does not follow the foot, and will not let the child fall off when wearing it; In addition, the rear support can also prevent the child's heel and ankle from being injured.

2, size-fit.

Some children's feet grow faster, and they will want to buy bigger ones. However, children wearing shoes that don't fit their feet may cause problems such as varus, valgus, X-shaped legs and O-shaped legs, so it is also very important to fit their feet.

After the child puts on the shoes, one of our fingers can be put into the heel, which is a more suitable size.

We can also turn the sole of the shoe against the baby's sole to determine whether it is too big or too small. The inner length of shoes should be , 5-1 cm larger than the foot length, the shoes in spring and autumn are generally 1 cm larger, and the sandals in summer are , 5 cm larger.

When the baby is wearing shoes, we can gently press the vamp on the toes with our fingers to see if there is any toe pressing.

also let the baby put on his shoes and walk around. After taking off his shoes, see if there are any indentations or red spots on his feet. (Shoes like the one in the picture above may get red here after being worn for a long time, so Ma Ma should pay attention to it. )

3. Upper-leather surface is king.

hole shoes (rubber shoes) and plastic jelly shoes are cute, aren't they? But buy carefully.

these shoes are usually damp, airtight and inflexible.

The most recommended is leather fabric, which is more comfortable for feet and can effectively support delicate little feet; Before going to school, we all try not to buy any plastic shoes for our children.

Leather shoes are also soft and hard, so we should buy moderate ones. Guama first gave Guagua Haitao small leather shoes, and the leather was very hard. Haitao was also difficult to return, so it could only be idle.

4. Sole-Flexibility but not too soft.

When children run and jump, if their shoes are too soft and their feet are not supported, they may damage joints and ligaments or even sprain.

Generally speaking, Oxford and rubber soles are the best.

5. Fastening-firmness is very important.

At present, most children's sandals on the market are made of hook and loop, and a few of them are buttons. Generally speaking, the button type will be stronger than hook and loop, but no matter which one, we should pay attention to the firmness.

Some hook and loop have relatively small contact area or poor quality, and it is easy to tear them carelessly, resulting in shoes falling off children's feet. Mama Gua bought shoes before, but after wearing them for two months, hook and loop didn't stick well. So we should pay attention to whether the contact area of hook and loop is large enough and the quality is good enough. What is the material of sandal uppers? 3

1. Look at the types of sandals

① Beach shoes: In the boys' world, there is not only one kind of sandals, but also it is very interesting in terms of types and Styles. Let's choose from the types and see if it suits your style. The design of beach sandals is very light, which is suitable for the beach by the sea and is a good choice for vacation. Today's beach sandals are more practical and trendy, and the texture of the street is quite strong, which is very easy to build.

② gladiator sandals: Roman sandals have a long history. This single product originated in the Middle Ages is very distinctive. It was originally worn by Roman soldiers, also known as gladiator sandals. The strap part and the winding part are special, and they are relatively formal sandals. Of course, the gladiator sandals worn by boys is a little more capable and neat, and it is more diverse in style. Daily going out is definitely a bright spot.

③ Mexican sandal: This kind of sandal is made of hand-woven structure, and it has a net design, which has nothing to say about breathability or comfort. Compared with large-area exposed sandals, such woven sandals can better modify the foot shape and have more choices in style and color.

2. Look at the material of sandals

① Upper: After talking about the general types, we still have to choose the hard core material of sandals. Sandals are made up of uppers and soles. The uppers are mainly made of leather, canvas and nylon, which are quite different from each other in terms of texture and durability. The leather is smooth and tidy, while the canvas nylon is a little more grainy.

② Sole: From the sole point of view, it mainly focuses on the requirements of wear resistance, anti-slip and fit. Because the sole part bears the ground and sole, it is easy to affect the walking posture. The common sole materials are rubber and EVA. The toughness of rubber is outstanding, and the anti-slip is also very good. The only problem is that it will be slightly bulky; EVA has good resilience and tension resistance, and it is moisture-proof.

I suggest you choose the material of the sole, which I mentioned above. Generally speaking, there is no big problem. Remember that the sole must not be stiff, otherwise walking is very uncomfortable and tiring. Generally, the price-performance ratio of rubber soles will be higher, and boys who pursue affordable convenience can give priority to it.

3. Look at the color of sandals

① Black: Finally, let's choose the most direct factor, that is, the color of sandals. No matter what kind of sandals, the color can always be "fatal". Wild black is the color with the highest utilization rate, and it is also the color that won't confuse boys. Basically, if you choose black, you can safely match it. Whether it is style or tonality, black can achieve a certain unity.

② Brown: After talking about black, people easily think of the classic color system of brown. Compared with the quietness of black, brown is much milder, but it is also a very manly color, and it will not appear black on the feet. In the brown series of sandals, leather ones account for the majority, which is very casual, not serious at all, but more friendly.

③ burgundy: retro colors are also very suitable for boys, so I have to tell you about burgundy. Wine red is not as bright and beautiful as red, but mixed with a hint of deep and calm, with a little rust, quite textured. Wine red is also a very white color, you can refer to the style of retro gentlemen to match, looking at it is full of advanced feeling.