Sunday, 20 April 2014 09:00

Outsole Manufacturing Solutions

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Shoe Sole Manufacturing Solutions

  • The various shoe-manufacturing techniques and can be broken down into four major categories. These categories are single density unit soles, dual density unit soles, single density direct attach, and dual density direct attach. Chem-Trend’s years of production floor experience working with shoe sole manufacturers around the globe has allowed us to understand and overcome the molding challenges found in each of these processes.
  • For single density unit soles, the polyurethane foam system is poured directly into the mold cavity (open pour) and a lid is secured over the cavity. At the completion of the cure cycle, the lid is removed and the completed part is de-molded. Single density unit soles are then attached to the upper material to complete the shoe manufacturing process. In many cases, single density unit soles are subjected to some type of post-mold operation to obtain the desired finished appearance on the part. Basic mold release agent requirements for this type of process include release performance, low build-up in the mold cavity, and compatibility with the post-mold finish operation and final shoe building process.
  • The dual density process requires bonding a midsole to an outsole in the same molding process. The outsole polyurethane foam is poured into the mold cavity, and a dummy last is used to close the mold. The dummy last is a type of false lid designed to cover the mold cavity, creating the proper thickness for the outsole while leaving room in the mold cavity for the midsole portion of the part. At the end of the outsole cure cycle, the dummy last is removed, and the midsole foam is poured on the backside of the outsole. A new lid is used to secure the mold, and a second cure cycle is completed. The molded soles may be subjected to post-mold finish operations and, as described above, are attached to the upper to finish the shoe. Release agent requirements for dual density unit soles are similar to those described for single density unit soles with one important difference: the mold release agent must be applied to the dummy last in order to separate it from the outsole. As a result, the release agent can be transferred to the outsole, but it must not interfere with adhesion between the outsole and midsole foam layers.
  • As the name suggests, the direct attach process is used to mold the sole directly to the upper material, eliminating the need for gluing or sewing to produce a finished shoe. Direct attach requires that the upper is secured to the top of the mold, and the polyurethane system(s) is injected into the mold cavity. For dual density direct attach, a dummy last is used to form the outsole, and the upper is secured into the mold prior to midsole injection. Scrap produced using a direct attach process is very expensive due to the fact that an entire shoe is wasted. It is also very difficult to complete a post-mold finish process on direct attach unit soles without affecting the upper portion of the shoe. For these reasons, mold release agent selection is critical. Direct attach mold release agents must produce a defect free urethane part, as well as impart a uniform gloss appearance. Gloss requirements are defined by the manufacturer, but can cover a broad range from low (matte) to high (shiny). Other important performance attributes for direct attach release agents include release, low build-up in the mold cavity, and dual density adhesion.
  • No matter what type of process you utilize in your shoe sole manufacturing operation, you can benefit from Chem-Trend’s extensive expertise in polyurethane molding, and our wide range of products developed to overcome the industry’s greatest challenges. Our products are designed to enhance your efficiency and reduce waste, providing you with higher quality soles and lower costs of operation.




Saturday, 19 April 2014 04:47

The 16th Jinjiang Footwear (Int’l) Exposition

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  •      The 16th Jinjiang Footwear (Int’l) Exposition, China, jointly sponsored by Fujian Provincial People’s Government, China Council for the Promotion of International Trade and China National Light Industry Council, will be grandly convened in the urban district of Jinjiang from April 18 to 21, 2014.Jinjiang footwear exhibition 2014
  •      The Jinjiang Footwear (Int’l) Exposition, China since 1999, as a “City Nameplate” of Jinjiang, the Capital of Brands in China, is growing in reputation and influence in the footwear industry from home and abroad. It is a barometer and weather vane for the shoemaking industry in China and even in the whole world and is titled one of the “Top 10 Charming Brand Exhibition of China” by the exhibition industry. Since 2010, the exhibition area each year has been maintained at 50,000 square meters with 1,700 international standard exhibition booths. Exhibitors come from more than 100 cities nationwide and more than 70 countries and regions in the world. The expected volume of transaction in THE 16TH Exposition reached 13.31 billion Yuan, with a year-on-year increase of 12.2%.
  •     “From shore to shore it seems wide at high tide, before fair wind a single sail is lifting”. Facing new situation and opportunities and confronting new challenges and tests, the 16th Jinjiang Footwear (Int’l) Exposition, China sincerely invites peers and coworkers to take your time off your busy work and participate in this grand ceremony and make a footwear exhibition with greater vitality, richer connotation and higher pursuit.
Friday, 18 April 2014 13:40

New outsole tech of anti slip and anti cold

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       South China University of Technology has developed a new timber material soles, wet skid resistance and anti-icing slip rubber material to fill the shoes of high-end technology gaps.

       China's outsole in the early 20th century has achieved the industrialized production, but is limited by the production technology and process conditions, the main source of the material only a single soles of leather or natural rubber.
In 2011, South China University of Technology Material Co., Ltd. a joint Guangdong Provincial Science and Technology Department of Guangdong Province reported Combination project - wet skid resistance and anti-slip rubber material ice research and industrialization. Currently, the project has been declared national invention patents, utility model patents 1, 3 acdemic papers.

Tuesday, 15 April 2014 07:17

GEAR Slip-free boots with non-marking outsole

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Slip-free boots that are actually comfortable? It's possible with Bogs' Ultra High Men's boots. Originally designed for dairy farmers who need to stay safe on slippery surfaces and are often on their feet for hours at a time, these boots are made to last and can be great for any adventure. They're also stylish enough for a trip around town.

Rated to -40 degrees, they'll get you through the rest of winter with no problem. They'll also last well through a wet spring with their durable 100 percent waterproof rubber construction and 7-millimeter waterproof insulation.

They have a non-slip and non-marking outsole, with a rubber midsole for extra cushion and an antimicrobial insole that provides odor protection for sweaty feet.

Tuesday, 15 April 2014 07:12

Newbalance's golf shoe outsole

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When a company known for running shoes takes up golf, no one should be surprised its focus would be on comfort, support and feeling light. These keys guided New Balance and its new NBG2002 golf shoe. 

NewStuff-NewBalance-shoe.jpgThe midsole is made of the company's REVlite material, which aids in cushioning and keeps the shoe's weight to only 11.9 ounces. Its outsole offers stability, and just a 10-millimeter drop from the heel to the midsole increases the shoe's responsiveness. 

New Balance's athletic influence is obvious, too. Though the upper is made of microfiber leather, it still has a running-shoe look. 

The NBG2002 ($125) comes in three colors and has a two-year waterproof warranty.

Monday, 14 April 2014 09:16

What is a dual density Eva outsole on shoes?

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 What is EVA dual density sole

      Let me put it in a easy way, we all know that soles has mid sole and outsole, mid sole is softer than
because mid sole needs comfortability for feet while out sole needs anti-slip ability .A sole of 

combination of mid-sole and outsole with different density that is we call dual density shoe sole.long
long ago, there 
are no dual-density- outsole" saying,because most outsole manufacturers produced
 mid-sole and outsole 
separatly,but with the time goes by and technology upgrading we can produce
mid-sole and outsole at once.
So the mold would be a key point.

Method of manufacture dual density EVA sole

   The method for fabricating a dual-density mid-sole includes the steps of: injection molding EVA 
material of a first density into a block;
placing the first densityEVAblock and raw EVA material pellets
of a second density together in a mold cavity; and applying heat and
pressure to the first densityEVA
 block and raw EVAmaterial pellets of a second density in the mold cavity to form a fused component.
The fused component is shaped and detailed into the mid-sole in a separate mold cavity.

       The result is a dual-density mid-sole consisting 
of one or more blocks ofEVA material of a first 
density fused to EVA material of a second
 density where the size, shape and location of the different 
density sections can be accurately controlled and precisely defined. An article of 
footwear including
an upper,
the dual-density mid-sole consisting of one or more blocks of EVA material of a first density
fused to EVA
 material of a second density,and an outsole, may be formed.

   upper mold and the lower mold, the mold having a cavity with each other on the lower mold cavity, and then separately
on the cavity and the lower cavity in the home into the same type of foam expansion ratio, and then heating the mold is
closed the entire group, the upper 
and lower mold cavity of the type of foam material into a shape with the lower layer of
the upper layer; then open the exit of the mold die, then the upper 
die and the mold is closed, so that the upper and
lower tie to form a sole; then after the second heating, the sole reaches 150 ℃ ~ 180 ℃ temperature,
so a combination
of different foam material integrally; finally die set is fully open, to make double-foam molding foam soles soles.
Patent Drawing
Patent Drawing
Patent Drawing
Patent Drawing
Patent Drawing
Patent Drawing
Patent Drawing
Patent Drawing

What is Phylon sole
        In China, we call Phylon sole a different name which is MD sole, or technically call it "Twice Foam EVA sole". Dosole has many soles in Phylon material , if you have our catalog you can find article number marked with "MD" then it is the Phylon material ,just like the picture right of you.It is usualy used in midsole of jogging shoe,running shoe,athletic shoe or sandals.

        Now ,let us introdue what is the phylon sole on earth, Phylon material biggest features are lightweight, flexible, and has good cushioning, Phylon foam is called  Twice Foam EVA material ,EVA sole is also very light soft and comfortble , but the performance and flexibility in terms of cushioning far smaller than Phylon sole, and the cost is much lower than Phylon, we all know that EVA sole is known as "Once Foam",so that is the difference and the reason they attribute the same, but different names as well different performances.

Manufacture method of Phylon sole 
        How to produce Twice Foam EVA(Phylon sole),as its name shows,Twice Foam EVA actually has the same raw material as EVA sole ,for Phylon(or MD) we make EVA foamed twice.
       When producing Phylon(MD) sole, plastic particles are heated twice then poured into the model to be pressurized and cooled finally you get what shape you want. That is why we  call it Twice Foam sole and thi is the way of making Phylon sole or MD sole . Phylon's softness is controlled by temperature,when can adjust the temperature when in heating process, the higher the temperature it is, the the greater density phylon it will , and the harder it will be. 
        On the contrary,the lower temperature in heating the more soft phylon it is, so , we can not judge one pair of Phylon sole good or not just by softness or hardness.

Disadvantages of Phylon sole
 Every coin has two sides,eventhough  the Phylon sole has so many strong points, but it has also a  bad side .It is not environmentally friendly ,because it is resistant to degradation.

Finnaly , I hope the information above helped you better understand the Phylon Outsole a bit .

Dosole - Your Ideal Outsole Supplier

      In general, the development of new products shoe styles that they will concentrate on the upper, rather than the sole. People are accustomed think: Sole has been working with the ground, "day and night relative" does not see the light, so the main quest is wear-resistant and non-slip, rather than to attract people's attention.

        Who noticed the sole pattern? Who noticed the sole pattern? A: The site survey team handling personnel will! Of course, this is just a small part of the very few people, and constitute the market. We have to note that the sole pattern is not just appear in the sole during walking, which is printed on the earth many times. This is the real market!

           At present, all kinds of shoes with soles have tread, but just to slip. If the pattern or the shape of the efforts made ​​features, a major breakthrough in the development of shoes Who is not it? "Bird line drunkenness, one place plum seal" bird footprints left in the snow is portrayed vividly. If the People's Bank of drunkenness, but also a land plum seal it? With this in mind, you can easily achieve, as long as the soles made ​​of a bird claws, is not able to leave footprints in the snow birds?
          Similarly, do you want out of the "catwalk", "tiger step" nature are alone. Such shoes have big market? Likely to adults, this shoe is nothing more than just a new map, go to work or should wear ordinary shoes. Cement road, you could not step on the marble floor footprint, targeted at adults, sandals and outdoor footwear is clearly the main design objects. But from the whole market considerations, it ought to be the main force shoes. Shoes not only fashion, health

Friday, 11 April 2014 02:41

Can I get a outsole sample from Dosole

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Can I get a sample from Dosole if I want one?

Yes,of course. Please contact our service.

How much cost for a sample?
Free, but freight should be collected by your side.

Can I get as many styles as I want for samples?
Not more than 3-5 pieces depended on different styles , and we only send one piece right side of 37# for female sizes, or 41# for male sizes.

How many days can I expect for sample?
Not more than 5 days, averaged 3-5days for making and plus 5-7days to be received by DHL UPS TNT FEDEX etc.

Thursday, 10 April 2014 15:24

Prada lady shoe outsole could leave your name

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          Prada (Prada) recently introduced a limited "private custom" series, you can own unique Prada heels in interior design, can be freely selected and combined from the height of the heel, fabric, soles to the color, the sole can also engrave his name English name abbreviation.

         From shoes to pointed shoes, from the sole to the heel, from suede to satin as well as with the height, color and markings ...... if fortunate enough to visit in Italy Prada flagship store in Sloane Street, you will have the opportunity to show their design talent, from the heel began to create their own Prada heels. There are three color sole option: black, brown and blue, and you can engrave his name on the soles of the beginning of the alphabet.

         According YOKA Fashion Network reported, Prada private custom series from the service charges 500 pounds (Contract 5000 yuan), located in Sloane Street, London, 43-45, Tel: 02072350008. Shoe production takes about a month's time, after the completion of Prada shoes will be sent to your home.

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