Ningbo Gongyao Sealing Materials Co.,Ltd---a professional manufacturer and exporter of Chinese sealing and heat insualtion materials,owns three factories,specialized in manufacturing braided packings, fiberglass,asbestors/non-asbestos products and other materials.Our company own Up-to-date technology,advaanced equipments,also near 40 years manufacturing experience and 100 tons output per month which assure a competitive price,good quality and 100 tons output per month which assure a competitive price,good quality and perfect service and can finish you order on time.
Enterprise Objective:Based on sincerity,the high quality at low price strives for the survival;the technical
Packaging & Delivery
Packaging Detail:Wooden pallet of about 1000 kgs, 2000kgs net each
Delivery Detail:15-35 days
. the product description
Asbestos rubber sheet is made up of asbestos, rubber and packing by pressing. According to its formula, process, performance and use different, there are mainly high pressure, low-voltage asbestos rubber sheet in asbestos rubber sheet, and oil resistant asbestos rubber sheet, acid and alkali resistance and other categories.
For pipe flanges, high pressure vessel flange sealing material and all kinds of mechanical junction surface. When using general rushed into various shapes according to the requirement, the size of the gasket.
2. manufacturing material
Manufacture of asbestos materials are chrysotile asbestos rubber sheet, blue asbestos (crocidolite) two kinds.
Chrysotile as part of the serpentine asbestos, its main composition is contains about 13% water of crystallization of magnesium silicate and its heat resistance, good alkali resistance, high tensile strength, acid resistance performance is poorer, most asbestos rubber sheet are produced by it.
Blue asbestos belongs to the class amphibole asbestos, main component is 2.5 ~ 3.5% water of crystallization of silicate, magnesium oxide composition is minimal, iron oxide accounts for about 18 ~ 24%. Blue asbestos heat resistant performance is good, not only and acid resistant performance, so much is used to make acid asbestos rubber sheet.
Asbestos fiber greater effects on the performance of the quality of asbestos rubber sheet, so the requirement of asbestos fiber tensile strength is high, the heat resistant performance is good, there is a certain length, fiber bending, elastic. General high pressure asbestos rubber sheet and more than 400 oil resistant asbestos rubber sheet is 2, 3 levels of asbestos fibers. Due to the use of asbestos rubber sheet limits, more use of ishikawa non-asbestos rubber asbestos board to replace the original.
3. characteristics of purpose
Features: with medium hardness, acid and alkali. In the temperature - between 30 ~ 60 ° C + 20% acid (alkali) in the liquid.
USES: can be coining various kinds of acid and alkali resistant requirements of good gasket sealing performance.
4.Physical Property:
| Asbestos Rubber Sheets Physical Property |
| GB/T539-1995 |
| Item |
IG-XJB450 |
IG-XJB400 |
IG-XJB350 |
IG-XJB300 |
IG-XJB200 |
IG-XJB150 |
Tensile Strength
Mpa ≥ |
19.0 |
15.0 |
12.0 |
9.0 |
6.0 |
5.0 |
| Aging Coefficient ≥ |
0.9 |
| Burning Lose %≤ |
28 |
30 |
30 |
| Density g/cm2 |
1.6-2.0 |
| Compressibility % |
12±5 |
| Rebound Rate |
45 |
40 |
35 |
| Pliability |
No Crack |
| Stress-relaxation %≤ |
50 |
Steam
Airtightness |
With the temperature of 440-450°Cand the pressure of 11-12 Mpa,Keep for 30 min without puncture |
With the temperature of 390-400°Cand the pressure of 8-9 Mpa,Keep for 30 min without puncture |
With the temperature of 340-350°Cand the pressure of 7-8 Mpa,Keep for 30 min without puncture |
With the temperature of 290-300°Cand the pressure of 4-5 Mpa,Keep for 30 min without puncture |
With the temperature of 200-220°Cand the pressure of 2-3 Mpa,Keep for 30 min without puncture |
With the temperature of 140-150°Cand the pressure of 1.5-2 Mpa,Keep for 30 min without puncture |
5.Regular size:
Length: 500 mm, 1000 mm, 1200 mm, 1500 mm, 2000 mm
Width: 500 mm, 1000 mm, 1200 mm, 1500 mm
Thickness: 0.5 -- 6mm
Packaging & Delivery
Packaging Details: 1000-1500 KGS per wooden pallet, Or 50 KGS per wooden case, Or roll packed with PE bag, Or as your requirements
Delivery Detail: 15-30 days after we received your deposit
Audited Supplier 
){kind=link}