CARBON MASTER BATCH

DongAh Group's CMB (Carbon Master Batch) Introduction 

The CMB division in Dong Ah Group was established in 1987 and has been focused on research and development of advanced CMB compounds and new technologies. This continuous efforts have placed the CMB division on top of Korean CMB industry. Our CMB division now holds numerous CMB compounds for Automobile, Electronics, Footwear and General Industry Products or Parts applications.

We have built a "POP SYSTEM (point of product system)", which is a real time monitoring system of the entire production process. In order to achieve our product quality level to perfect, we have established a "LOT TRACKING SYSTEM" which allows us to monitor or track whole manufacturing processing from receiving of raw materials to delivery of finished products.

We are doing pursue our best efforts to meet our consumer's satisfaction.

 

1. Inline Product (standard compound) : We have broad range of inline products to meet client's need. (e.g. types of polymer, physical properties etc.)

2. Customized Compounding : We produce products upon customer's specification or recipe.

 

Types of Supply

 * CMB : 1st stage mixing master batch

Unvulcanized rubber is mixed with a various types of additives (e.g. raw rubber, fillers (e.g. carbon black, silica, etc.), softener, plasticizer, etc.) physically in a mixing machine.

- the CMB stocks are packed following customer's requirement. (for example : by 20kg, 30kg, etc.)

 

 * FMB : 2nd stage mixing master batch

Curatives (e.g. sulfur, accelerators, peroxides, etc.) are added into CMB, in the state (e.g. sheet or ribbon shape) that customers can process it immediately as their wish.

 

- type of sheet, ribbon.

POLYMER TYPE

Characteristic

Application

EPDM
outstanding water, ozone, weather resistance and electrical insulating properties.

general purpose goods, weather strip, gasket, packing, hanger, hose and cable, etc.

NR

excellent mechanical properties, low heat and good fatigue resistance.

tire, vibration-resistant rubber, engine mount, hanger, belt, shoes, hose and spring, etc.
SBR
good processability and durability. rubber mat, rubber oilskin, pigment, belt, tire, etc.
BR

good abrasion resistance, elastic property and good flexibility at low-temperature.

tire tread, shoe outsole, rubber roll, belt and hose, etc.

blends with SBR or NR, etc. to improve chemical and mechanical properties.
NBR
excellent oil resistance. fuel hose, oil seal, safety shoes, gasket, etc.
IIR
(butyl rubber)
low gas permeability, low chemical reactivity, low rebound elasticity, and good vibration absorption. tire tube, bladder, hiking boots, curing bag, conveyer belt, engine mount, etc.
CR
low flammability, good adhesive, oil resistance, weather resistance, good elastic, chemical resistance, and mechanical properties. fuel hose skin, belt, adhesive, windowsill, rubber oilskin, etc.
Other
customer designed rubber compounds.  


CMB rubber goods

 

Quality Control system (HMC SQ / ISO 9001)

 

POP SYSTEM

  POP SYSTEM monitors & checks a point of production of all the process ranges from stock of raw materials to release of the products, which detects human error and malfunction of operating machine.

 

FOOLPROOF SYSTEM

  FOOLPROOF SYSTEM stops the process when a nonconformity occurs during processing.

 

EXAMINATION & TEST CONTROL SYSTEM

  During production process, a randomly picked specimen is examined and it's each data is stored in a database automatically. When a defective good is detected unexpectedly , the system sort it out automatically.

 

LOT TRACKING SYSTEM

  LOT TRACKING SYSTEM is a trail system which one can trace back a product from a raw material to a final product even customers are using.

 

REAL TIME PRODUCTION MONITORING SYSTEM

  This is an immediate response system when an unexpected accident occurs during manufacturing process.