poor ventilation.

Shoe shoe is that the size of the identity of fertility. Different countries according to their shoe size is a commonly used unit of measure, idioms, and the main characteristics of hair foot family law enacted.
The main production of the early

shoes, old shoes shoes are Shichi No. logo, also known as Shanghai No.. Such as 7-inch 8,6 inch 2, etc., No. 1 bad points about 3.33mm. Began producing shoes in the after part of the switch to French horn similar mark, such as the 78 divided by 2 to become a 39.

China's first shoe standards, is the first large-scale national foot measurements (1965-1968) based on the results, and included in the GB/T3293-1982 last series of

the characteristics of shoe-based coding is to develop long legs, the old standard is to use cm system. Foot length in centimeters, how many centimeters of shoes to wear, such as foot length 23CM (including 22.8-23.2), wearing 23's shoes.

China on January 16, 1998 release of GB/T3293-1998 integration with the international shoe.

1. What is the RB: Rubber, namely rubber, into natural rubber and synthetic rubber, natural rubber, mainly from Hevea, synthetic rubber, synthetic methods by using different raw materials (monomer) different types of synthetic rubber, polybutadiene rubber and styrene butadiene rubber as the most common synthetic rubber production. RB soles wear resistance, shrinkage and stability, good bending, but the material weight, are generally used for outsole.

2. What is PU: Polyurethane,Supra Society Sale, polyurethane composite materials for the polymer is based on the large density durable foam rubber material,MBT Walking Shoes, density, hardness, wear resistance, good flexibility, but absorbent, easy fracture, easy to yellowing. PU commonly used in basketball, tennis shoes in the hands of the end or after the end of dissection, may also be used for casual shoes outsole.

3. What is a PVC: Polyvinylchloride, PVC, is widely used in today's world a synthetic material. Most of the more expensive, oil, wear, good insulation properties, but poor slip resistance, not cold, not folding, poor ventilation.

4. What is the TPU: Thermoplastic Polyurethane, thermoplastic polyurethane elastomer, is a linear polymer materials. TPU has the advantage of flexibility, but the material weight, shock absorption is poor. Commonly used in jogging, walk, casual shoes in the end.

5. What is TPR: Thermoplastic Rubber, thermoplastic elastomer, also known as thermoplastic rubber. Both rubber high strength, high elasticity, but also injection molding process,MBT Sandals Sale, with environmental non-toxic, wide range of hardness, color of the fine, soft touch, anti-fatigue, good temperature resistance,http://bbs.conn.tw/viewthread.php?tid=137813&extra=page%3D1&frombbs=1 &member_code=5880412, excellent processing properties,Supra Shoes, such as multiple features. Both secondary injection molding, can also be forming a separate,Asics Shoes, but poor wear resistance.

6. What is TR: TPE and rubber composite material that has the appearance of the pattern are many, feel good, brilliant color,http://carsandsuperstars.com/display...php?pos=-11031, finish, high-tech features, but also 100% recycled materials are environmentally friendly soles.

soles of the material identification and characteristics:

on the PU, PVC, TPR, RUBBER other identification!

PU is the lightest and most durable.

PU shoe sole material is easy to recognize, very light in his hand,cheap shoes uk, soles of the holes are round the back.

PVC soles of material in his hand heavier than TPR's.

TPR soles elastic material is better than PVC, the sole firm in the hand,http://www.quanjinglian.com/uchome/s...=blog&id=88225, the natural fall down, if they can bounce back so that the TPR

PVC material TPR soles than the cheaper, but the quality is poor, especially in the winter, it is easy off the bottom.

PVC material has a characteristic that is not the sole injection holes, as well as with the smell, then there is taste. stood for a long time, then also president of the white stuff.

TR sole surface is very bright. than the average TPR soles should be stiffer. TR TPR injection of more than holes. injection hole is very special.

weight: RUBBER (rubber) the most important, PU, ​​EVA lightest,

material: PU expensive, EVA, TPR moderate, PVC cheapest

craft: TPR is a shape to do it, but to processing of PVC, ABS material is generally high heels, expensive and hard,

applications: PVC is used in lining or bear the weight of the site,MBT Sandals Clearance, or the manufacture of children's shoes; PU leather for shoes, you can bear the weight of the fabric or the site. In the bag, the more applicable is the PVC leather. This is because the bag is different from the wear items in the foot in the shoe, will not emit heat; do not bear the weight of the individual.

PU,Supra Vaider UK, PVC's way easier to distinguish, from the bottom corner to see PU thick PVC fabric than many, also has a different feel, PU's soft number; PVC hard some of the feel; also be used fire to burn, PU PVC smell than the taste of a lot to light.

1. first say what is the PH: PHYLON dragon collectively.

2. So what is PHYLON: EVA foam with a heated compressed mixture of substances made of the hardness by the foaming temperature control, is characterized by light weight, flexibility and good seismic performance, high-end running shoes, tennis shoes, basketball shoes in the end of the main materials used can also be used for casual shoes outsole.

3. So what is EVA: Ethylene Vinyl Acetate, ethylene vinyl acetate copolymer is ethylene (E) and vinyl acetate (VA) copolymer in the system.

EVA is a kind of plastic material from ethylene (E) and vinyl acetate (VA) of the composition. Proportion of these two chemicals adjustable for different applications to meet the needs of vinyl acetate (VA content) the content is higher, its transparency, flexibility and tenacity will be relatively increased.

EVA and PEVA is characterized by:

1, biodegradable: Discard or combustion does not harm the environment.

2, and PVC prices are similar: EVA PVC prices more expensive than the toxic, but relatively free of phthalates in PVC is cheap.

3, lighter: EVA density ranged from 0.91 to 0.93, while the PVC was 1.32.

4, non-odor: EVA does not contain such as ammonia (ammonia) or other organic odors.

5, free of heavy metals: the toys comply with the relevant international regulations (EN-71 Part 3 and ASTM-F963).

6, does not contain phthalates: suitable for children toys and no release of hazardous plasticizers.

7, high transparency, flexibility and toughness: a wide range of applications.

8, super-low temperature (-70C): suitable for freezing environment.

9, resistant to water, salt and other substances: In a large portion of the application can maintain a set.

10, heat paste: can be firmly affixed to the nylon, polyester, canvas and other cloth.

11, the low temperature fit: to accelerate the production rate.

① outsole

outsole materials are generally the use of natural rubber or synthetic rubber.

Natural rubber is obtained from plants of natural polymers,http://pandasthumb.org/archives/2011....html#comments, the advantage of soft, flexible, drawback is poor wear resistance, used for indoor sports shoes.

generally divided into styrene-butadiene synthetic rubber butadiene rubber. SBR is a copolymer of butadiene and styrene, was the first general-purpose industrial synthetic rubber, its main features include the quality of uniform, anti-aging, heat, wear, but the sticky, poor adhesion; BR is cis 1,4 - polybutadiene rubber short, second only to the consumption of styrene butadiene synthetic rubber, its main features include abrasion resistance, good elasticity, good resistance to flex, but the tear strength, only slip of the poor.

② in the end or the end of

in the soles of shoes belonging to the same class of PH in the plastic bottom and EVA midsole most common. EVA is a foam midsole, lightweight,MBT Shoes Sale, PH in the end of the second foam, lightweight, flexible, and has good cushioning performance, perform better than EVA shoes, EVA higher than the cost. The PH and the EVA sole good performance, and more for brand sports shoes, the company's main product is the two soles.

addition to PH in the bottom and EVA midsole,Supra Vaider Tuf, PU midsole is also very common, PU midsole greatest advantage is the flexibility and toughness is good, but easy hydrolysis.

now a lot of sports shoes with built-in bottom structures, also called the package in the end, the end of the package type from the appearance of shoes with outer soles and uppers from the two major components, there are still in the bottom structure, in the end just in the upper inside of the package. The bottom end of the package can also be counted as a form, and packets in the end is different is that the bottom is wrapped in sole in the end, is not really looking at the overall appearance of the rubber soles.
Integral sole

③

integral EVA soles are the most common foam molding soles, this shoe, low cost, but the degree of slip differential. Also common is the whole PU soles. PU shoe soles are cold forming, is characterized by light, but not wet, getting to the water after a chemical reaction occurs eroded layer by layer. There is also a whole style is pure rubber sole shoes. All the rubber composition of the sole, slip resistant advantages and disadvantages of a heavy weight. Pure rubber soles used for outdoor hiking shoes or work shoes, electrical shoes.