Heat resistant conveyor belt has good heat resistance, used in high temperature aging is not easy to crack, Baoding Zhongbo industry and Mining Machinery Co., heat-resistant conveyor belt has been widely acclaimed. Heat level general, belt at 100 ℃ -120 ℃, using SBR combined with non sulfur curing system; to require a higher heat resistant conveyor belt is made of EPDM with low sulfur or sulfur free vulcanization system, and the heat-resistant antioxidant.

According to the heat tolerance of different, can be divided into different heat resistance level, but the requirements are not aging, cracking, the conveyor belt to this point.

The conveyor belt working at a temperature of 120 ℃ environment:

(1) were selected to styrene butadiene rubber, chloroprene rubber, rubber content about 55%.

(2) curing system for Magnesium Oxide 4 copies, 5 copies of Zinc Oxide. In order to speed up the curing progress and improve the tensile stress, can join the 0.5phr-1.0phrNA-22, but more than 1phr is easy to produce coke. Vulcanization system should be adopted to promote styrene butadiene rubber with low sulfur and high effective and semi efficient curing system.

(3) reinforcing agent commonly used with high abrasion furnace black, easy processing channel black, the dosage is 40phr-50phr.

(4) softening system to select the softener high boiling point, low volatile for the legislation, commonly used has the ancient Malone, asphalt, oil etc..

(5) the antioxidant should be much support heat aging resistance, not easy to be a good oil out old agent MB, the amount of 2phr-3phr.

The conveyor belt working at a temperature of 160 ℃ -180 ℃ environment:

(1) the rubber general three yuan of ethylene propylene rubber, rubber content 50%-55%.

(2) curing system as the sub EPDM saturation is high, less sulfur double bond, cross-linking slow, should adopt the sulfur carrier or DCP crosslinking, were 2phr-3phr, 4phr-6phr.

(3) the reinforcing filler generally add hard black resistance, the amount of 40phr-50phr.

(4) the best selection of softening agent, softener high boiling point volatile low, such as the anvil of allyl resin is better, the amount of about 5phr.

(5) the three rubber high saturation, heat aging resistant performance is good, only need to add a small amount of antioxidants, such as MB1phr-2phr.

At a temperature of 200 ℃ or above, conveying work environment with:

(1) considering the performance and cost of ethylene propylene rubber and silicone rubber can be selected and used rubber as the main body. Gum content of about 50%.

(2) curing system according to the use requirements, available sulfur carrier with sulfur vulcanization dosage in 2phr-3phr; or conditions permit use peroxide vulcanization, commonly used include DCP dosage is about 4phr-6phr.

(3) reinforced filling system with good reinforcing effect of N2 series, N3 series of carbon black, the amount used in 50phr-60phr.

(4) softening system heat resistant conveyor belt softening system is generally used in high boiling point, low volatile oil, commonly used paraffin oil etc..

(5) for old age system generally adopts the amine antioxidants, such as MB, RD, 6PPD, dosage is about 2phr-3phr. For example: CIIR40, EPDM60 formula, Magnesium Oxide stearic acid 0.5, 0.5, 5, 1.25 alkyl phenolic resin resorcinol, adhesion promoter 2.5, six methylene four amine 0.8, semi reinforcing carbon 70, Bai Tanhei 15, paraffin oil, 5, 20 Zinc Oxide accelerator TMTD1, accelerator CZ1.5, 1, sulfur vulcanizates the performance of MPA9.8, the tensile strength, tensile stress at 300% elongation at break of MPA8.1, KN/m37, Yingshang (shore A) 61, adhesion strength of N/cm360.

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