What material is good for sandal uppers? Sandals are open shoes. They are shoes that can be worn by both men and women by fixing the soles on their feet through straps, posts or arches and ankles. So what material is good for choosing sandal uppers?
What material is the sandal upper? 1 plastic, EVA and rubber. Sandals are made of EVA, which is good in material and light.
Select:
1, if it is a single material sandal, EVA is more suitable, light and comfortable; Rubber is heavy, but soft and comfortable.
2. Sandals should be made of composite materials, with rubber for the outsole, foamed EVA for the midsole, PU for the insole and leather for the upper. Composite materials can be reasonably matched according to different needs, and have advantages over single materials.
Difference:
1, hardness: plastic >; EVA> rubber has opposite elasticity.
2. Aging and deformation: plasticity >; EVA> rubber.
3. taste: EVA> rubber >: plastic.
4. weight: rubber > plastic > EVA.
EVA soles have high resilience and tensile strength, high toughness, good shock-proof and cushioning properties, excellent heat preservation, cold resistance and low temperature resistance, good cold resistance, closed-cell structure, good sound insulation effect, good water absorption, moisture resistance and 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 20%, it can be used as plastic. EVA has good low temperature resistance, and its thermal decomposition temperature is about 230℃. 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? The main materials of the upper 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: divided into natural cloth and synthetic cloth, wear-resistant, elastic, heavy, high cost.
3.TPR(T-heat, P-plastic, R-glue): It has rubber properties, wear resistance and low cost, but it will slip when it comes into contact with engine oil and solvent.
4.PU: Excellent abrasion resistance and repeated bending performance, good tear strength and elasticity, 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 more suitable for platform shoes, which requires impact resistance and wear resistance. However, there are some problems such as yellowing, hydrolysis, cracking and easy to open glue. Air cushion shoes and football shoes are commonly used materials.
5, PVC: synthetic resin, medium resistance to the bottom, less used because of ecological and environmental problems, commonly used materials for air cushion shoes and football shoes.
6, MD (Huailongdi): EVA foam molding, good flexibility, high elasticity, good warmth retention, but poor wear resistance, generally high-top shoes are more suitable.
7. thimble plate: also known as outsole bracket, it has the functions of super support, deformation prevention and shock absorption. Generally can be divided into three types:
A, carbon fiber injection tablets: high hardness and high density.
B, the material of the projectile: it is a relatively soft material.
C, micro-injection PVC: generally used to make small LOGO trademarks.
Choose sandals and focus on these five places.
1, front and rear-front head and rear bracket.
Children like to jump up and down, and their toes are very fragile. Usually some pebbles, sharp sand and even glass may hurt their toes, so the shoes in front of Baotou will be more suitable for them. Older children or adults can wear open-toed sandals.
There should also be support at the back (not the style of slippers). First of all, this affects the heel and does not follow the foot, and it will not let the child fall when put on; In addition, the back support can also prevent children's heels and ankles from being injured.
2, the size is right.
Some children's feet grow faster and will want to buy bigger ones. However, children wearing shoes that don't fit their feet may have problems such as varus, valgus, X-shaped legs and O-shaped legs, so it is also very important to fit their feet.
After children put on shoes, the heel can reach into one of our fingers, which is a more suitable size.
We can also turn the sole against the baby's sole to determine whether it is too big or too small. The inner length of shoes is 0,5-1 cm longer than that of feet, shoes in spring and autumn are generally1cm larger, and sandals in summer are 0,5 cm larger.
When the baby wears shoes, we can gently press the vamp on the toes with our fingers to see if there is pressure on the toes.
Also let the baby put on shoes and walk around. Take off his shoes and see if there are any indentations or red spots on his feet. (Shoes like those in the picture above may turn red here after being worn for a long time. Ma Ma should pay attention. )
3, the upper leather is king.
Aren't hole shoes (rubber shoes) and plastic jelly shoes cute? But buy carefully.
This kind of shoes is usually damp, airtight and inflexible.
The most recommended is leather fabric, which is more comfortable and can effectively support delicate feet; Before school, we all try not to buy any plastic shoes for our children.
Leather shoes also have soft and hard points, buy moderate soft and hard ones. Mama Gua first gave Guagua Haitao small leather shoes, which were very hard. Haitao is also difficult to return and can only be idle.
4, the sole-flexible bending but not too soft.
When children run and jump, if the shoes are too soft and their feet are not supported, they may damage joints and ligaments and even sprain.
Generally speaking, Oxford cloth and rubber soles are the best.
5, buckle-firmness is very important.
At present, most children's sandals on the market are adhesive tapes, and a few are buttons. Generally speaking, the button type will be stronger than the adhesive tape, but no matter which one, we should pay attention to the firmness.
Some adhesive tapes have a relatively small contact area or poor quality, and they are easily torn by carelessness, resulting in shoes falling off children's feet. Guama bought shoes before, and after wearing them for two months, the adhesive tape didn't stick well. So we should pay attention to whether the hook-and-loop contact area is large enough and the quality is good enough.
What material is good for sandal uppers? 3 1, depending on the type of sandals.
1 sandals: in the world of boys, there is not only one kind of sandals, but they are very interesting in terms of types and styles. Let's choose one of these types and see if it suits your style. The design of beach sandals is very light, suitable for the beach by the sea, and it is a good choice for vacation. Nowadays, beach sandals are more practical and trendy, and the street texture is quite strong, which is very easy to build.
② Gladiator sandals: Roman sandals have a long history. This kind of 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 are more formal sandals. Of course, the gladiator sandals worn by boys are more capable and neat, and the styles are more diverse. Going out every day is definitely a bright spot.
③ Mexican sandal: This kind of sandal is hand-woven structure with mesh design, which has nothing to say about breathability or comfort. Compared with large-area open-field sandals, this kind of woven sandals can better modify the foot shape and have more choices in style and color.
2, look at the sandal material
1 vamp: Speaking of general types, we should choose the hard core material of sandals. Sandals consist of uppers and soles. The vamp is mainly made of leather, canvas and nylon, which are quite different from each other in terms of texture and durability. Leather is smooth and tidy, while canvas nylon has a stronger graininess.
2 Sole: From the sole, it mainly focuses on the requirements of wear resistance, non-slip and fit. Because the sole part bears the ground and the sole, it is easy to affect the walking posture. Common sole materials are rubber and EVA. Rubber has outstanding toughness and good skid resistance. The only problem is that it will be slightly bulky; EVA has good resilience and tension resistance, and is moisture-proof.
The material of the sole, I suggest you choose what I mentioned above. Generally speaking, the problem is not big. Remember that the sole must not be stiff, otherwise it will be uncomfortable and tired to walk. Generally, the cost performance of rubber soles will be higher, and boys who pursue affordable convenience can be given priority.
3. Look at the color of sandals
① Black: Finally, let's choose the most direct factor, that is, the color part of sandals. No matter what kind of sandals, the color can always be "fatal". Wild black is the most used color, and it will not confuse boys. Basically, if you choose black, you can match it with confidence. Whether it is style or tonality, black can achieve a certain unity.
② Brown: Speaking of black, people can easily think of the classic color system of brown. Compared with the quietness of black, brown is much gentler, but it is also a very masculine color, and it will not appear black on your feet. Among the brown sandals, leather ones account for the majority, which is very casual, not serious at all, but more friendly.
3 wine red: retro colors are also very suitable for boys, so I have to talk to you about wine red. Wine red is not as bright and beautiful as red, but it is mixed with a hint of deep and calm, with a little rust, which is quite textured. Wine red is also a very white color, which can be matched with reference to the style of retro gentlemen, and it is full of advanced feeling when looking at it.