Month: May 2019

Our EPDM (ethylene propylene diene monomer) closed cell sponge is a versatile material, which has high chemical stability, excellent electrical insulation properties and resistance to ageing, ozone, UV and weathering. The closed cell structure means it is resistant to air and water. Our company manufacture and supply wide varieties of EPDM sponge rubber sheets, which can make into various parts including EPDM rubber gaskets and EPDM strips etc. We can supply plain EPDM sponge rubber sheets and self adhesive EPDM sponge rubber sheets.

Our EPDM sponge rubber sheets can be widely used in various industries, like construction, refrigeration, air conditioning and other industries where environmental conditions are not required. Our EPDM sponge rubber sheets can also be widely used in areas with high environmental requirements, such as automotive air conditioning system in the environment (-40℃~+150℃) and areas with high temperature and environmental protection requirements, like hospitals, pharmaceutical plants, military equipment etc. 

Our main product lines of foam sheet include closed cell and open cell, EPDM, NBR, NBR/PVC, CR, EVA, PE with form factor of plate, sheet or roll etc. These foam sheets have been widely used in automobile, construction, aerospace, train, home appliance, electronics fields as gaskets, seals, shock/vibration absorber, thermal insulation and sound proofing materials etc. For more information, please contact with us at any time and we will offer you the satisfied products.

Item No.	Material	State	Color	Density (Kg/m3)	Tensile strength (Mpa)	Elongation at break (%)	Tearing strength (right angle type, KN/m)	Compression set (50%,23℃, 72h,%)	Burning rate (mm/min)	Maximum size (mm)	Inspection standard
YEO-10K	EPDM	Open cell	Black	90±20	≥0.1	≥200	≥0.5	≤3	≤40	50*1000*2000	JIS
YEO-10R	Open cell	Red	90±20	≥0.1	≥200	≥0.5	≤3	≤100	45*1000*2000	JIS
YEC-14	Closed cell	Black,Gray	130±20	≥0.4	≥120	≥2	≤8	≤30	40*1000*2000	JIS
YEC-16	Closed cell	Black,Gray	170±20	≥0.6	≥120	≥3	≤8	≤30	40*1000*2000	JIS
YNPO-55	NBR/PVC	Open cell	Black,Gray	60±10	≥0.1	≥100	≥0.5	≤5	≤20	30*1000*10000	JIS
YNPC-65	Closed cell	Black	70±10	≥0.2	≥120	≥1	≤8	≤20	30*1000*10000	JIS
YNO-01	NBR	Open cell	Black	80±20	≥0.1	≥120	≥0.5	≤3	≤10	25*700*3000	JIS

Kindly note: The above data are just for reference, for specific data and other items, please contact with us.

Different rubber products have different processing processes. Formulation, rubber mixing, calendering, extrusion, molding and vulcanization are the basic processes for the production of rubber products.

According to the performance requirements and manufacturing process conditions, the formula of rubber sheet is tested, practiced, identified, and the raw materials are reasonably selected to determine the dosage and ratio of various materials. Under the premise of not reducing product quality, reduce the cost of rubber compound, increase labor productivity, reduce energy consumption in processing and manufacturing, and improve production efficiency.

The mixing is the first step in the production process of rubber sheet. Its task is to mix the raw rubber which is required by formula and various raw materials to make the rubber compound which meets the performance requirements. That includes two main processes – Plastication Process and Compounding Process. Compounding processing is based on Plastication Process. The two processes are commonly known as rubber mixing processes. The rubber mixing equipments mainly have open mill and internal mixer.

Calendering of rubber sheet is to make rubber compound into a sleek sheet which has a specified section thickness and width through the use of calender. Sheets which have large section thickness can be separately calendered into thinner sheets and then laminated to the sheets with specified thickness.
 The final step in the production of rubber sheets is vulcanization. The macroscopic characteristics and microstructure of rubber products have changed during this process. The temperature, pressure and time during vulcanization are the main factors to constitute the vulcanization conditions, and are also called three elements of vulcanization.