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There are two basic types of rubber used in the rubber industry: natural and synthetic. A number of different synthetic rubber polymers are used to make a wide variety of rubber products (see table 1). Natural rubber is mostly produced in Southeast Asia, whereas synthetic rubber is mostly produced in the industrialized countries—the United States, Japan, Western Europe and Eastern Europe. Brazil is the only developing country with a significant synthetic rubber industry.

Table 1. Some important rubber polymers

Type of rubber/
Elastomer

Production
(1000s of tonnes in 1993)

Properties

Common uses

Natural rubber

Thailand
Indonesia
Malaysia
India

1,501
1,353
923
426

General purpose; not oil-resistant, swollen by solvents; subject to weathering by oxygen, ozone,
UV light

Tyres, shock mounts, seals, couplings, bridge and building bearings, footwear, hoses, conveyor belts, moulded products, linings, rolls, gloves, condoms, medical devices, adhesives, carpet backing, thread, foam

Polyisoprene (IR)

US
Western Europe
Japan

47
15
52

General purpose; synthetic natural rubber, similar properties

See natural rubber above.

Styrene-butadiene (SBR)

US
Western Europe
Japan

920
1,117
620

General purpose; Second World War natural rubber substitute; poor oil/solvent resistance

Tyres (75%), conveyor belts, sponge, moulded goods, footwear, hoses, roll coverings, adhesives, waterproofing, latex carpet backing, foam products

Polybutadiene (BR)

US
Western Europe
Japan
Eastern Europe

465
297
215
62 (1996)

Poor oil/solvent resistance; subject to weathering; high resilience, abrasion resistance and low
temperature flexibility

Tyres, shoes, conveyor belts, transmission belts, toy superballs

Butyl (IIR)

US
Western Europe
Eastern Europe
Japan

130
168
90
83

Low gas permeability; resistant to heat, acid, polar liquids; not resistant to oil, solvents; moderate weathering

Inner tubes, tire curing bladders, caulking and sealants, cable insulation, vibration isolators, pond liners and roofing membranes,
high-temperature conveyor belts and hoses

Ethylene-propylene/
Ethylene-
Propylene-
Diene

US
Western Europe
Japan

261
201
124

Low-temperature flexibility; resistant to weathering and heat but not oil, solvents; excellent electrical properties

Wire and cable jackets; extruded weather stripping and seals; moulded products; isolation mounts; liner sheeting for grain storage, roofing, ponds, ditches, landfill

Polychloroprene (CR)
(neoprene)

US
Western Europe
Japan

105
102
74

Resistant to oil, flame, heat and weather

Wire and cable jackets, hoses, belts, conveyor belts, footwear, wet suits, coated fabrics and inflatable products, extrusions, adhesives,
bridge and rail mounts, sheeting, sponge gaskets, latex foam products

Nitrile (NBR)

US
Western Europe
Japan
Eastern Europe

64
108
70
30

Resistant to oil, solvents, vegetable oil; swollen by polar solvents such as ketones

Sealants, fuel-resistant hose linings and gaskets, roll coverings, conveyor belts, shoe soles, gloves, adhesives, oil-drilling equipment

Silicone (MQ)

US
Western Europe
Japan

95
107
59 (1990)

Stable at high/low temperatures; resistant to oil, solvents, weathering; physiologically and chemically inert

Wire and cable insulation, seals, adhesives, gaskets, specialty moulded and extruded goods, gas masks and respirators, food and medical tubing, surgical implants

Polysulphide (OT)

US
Western Europe
Japan

20
0
3

Resistant to oil, solvents, low temperature, weathering; low gas permeability

Roller covering, hose liner, gaskets, moulded goods, sealants, gas meter diaphragms, glass sealants, solid rocket propellant binder

Reclaimed rubber

–

–

Shorter polymer chains; easier processing; less mixing time and power consumption; lower tensile strength and lower cost

Tyres, inner tubes, floor mats, mechanical goods, adhesives, rubberized asphalt

Source: Production figures abstracted from Stanford Research Institute data.

Tyres and tyre products account for approximately 60% of synthetic rubber use and 75% of natural rubber consumption (Greek 1991), employing about half a million workers worldwide. Important non-tyre uses of rubber include automotive belts and hoses, gloves, condoms and rubber footwear.

In recent years, there has been a globalization of the rubber industry. This labour-intensive industry has grown in developing countries. Table 2 shows worldwide natural and synthetic rubber consumption for 1993.

Table 2. Worldwide rubber consumption for 1993

Region

Synthetic rubber
(1000 tonnes)

Natural rubber
(1000 tonnes)

North America

2,749

999

Western Europe

2,137

930

Asia and Oceania

1,849

2,043

Latin America

575

260

Central Europe

215

65

Commonwealth of Independent States

1,665

100

Middle East and Africa

124

162

China and Asia*

453

750

Total

9,767

5,309

*Includes China, North Korea and Viet Nam.

Source: International Institute of Synthetic Rubber Producers 1994.

 

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Contents

Rubber Industry References

American Conference of Governmental Industrial Hygienists (ACGIH). 1995. Industrial Ventilation: A Manual of Recommended Practice, 22nd ed. Cincinnati: OH: ACGIH.

Andjelkovich, D, JD Taulbee, and MJ Symons. 1976. Mortality experience in a cohort of rubber workers, 1964–1973. J Occup Med 18:386–394.

Andjelkovich, D, H Abdelghany, RM Mathew, and S Blum. 1988. Lung cancer case-control study in a rubber manufacturing plant. Am J Ind Med 14:559–574.

Arp, EW, PH Wolf, and H Checkoway. 1983. Lymphocytic leukemia and exposures to benzene and other solvents in the rubber industry. J Occup Med 25:598–602.

Bernardinelli, L, RD Marco, and C Tinelli. 1987. Cancer mortality in an Italian rubber factory. Br J Ind Med 44:187–191.

Blum, S, EW Arp, AH Smith, and HA Tyroler. 1979. Stomach cancer among rubber workers: An epidemiologic investigation. In Dusts and Disease. Park Forest, IL: SOEH, Pathotox Publishers.

Checkoway, H, AH Smith, AJ McMichael, FS Jones, RR Monson, and HA Tyroler. 1981. A case-control study of bladder cancer in the U.S. tire industry. Br J Ind Med 38:240–246.

Checkoway, H, T Wilcosky, P Wolf, and H Tyroler. 1984. An evaluation of the associations of leukemia and rubber industry solvent exposures. Am J Ind Med 5:239–249.

Delzell, E and RR Monson. 1981a. Mortality among rubber workers. III. Cause-specific mortality 1940–1978. J Occup Med 23:677–684.

—. 1981b. Mortality among rubber workers. IV. General mortality patterns. J Occup Med 23:850–856.

Delzell, E, D Andjelkovich, and HA Tyroler. 1982. A case-control study of employment experience and lung cancer among rubber workers. Am J Ind Med 3:393–404.

Delzell, E, N Sathiakumar, M Hovinga, M Macaluso, J Julian, R Larson, P Cole, and DCF Muir. 1996. A follow-up study of synthetic rubber workers. Toxicology 113:182–189.

Fajen, J, RA Lunsford, and DR Roberts. 1993. Industrial exposure to 1,3-butadiene in monomer, polymer and end-user industries. In Butadiene and Styrene: Assessment of Health Hazards, edited by M Sorsa, K Peltonen, H Vainio and K Hemminki. Lyon: IARC Scientific Publications.

Fine, LJ and JM Peters. 1976a. Respiratory morbidity in rubber workers. I. Prevalence of respiratory symptoms and disease in curing workers. Arch Environ Health 31:5–9.

—. 1976b. Respiratory morbidity in rubber workers. II. Pulmonary function in curing workers. Arch Environ Health 31:10–14.

—. 1976c. Studies of respiratory morbidity in rubber workers. III. Respiratory morbidity in processing workers. Arch Environ Health 31:136–140.

Fine, LJ, JM Peters, WA Burgess, and LJ DiBerardinis. 1976. Studies of respiratory morbidity in rubber workers. IV. Respiratory morbidity in talc workers. Arch Environ Health 31:195–200.

Fox, AJ and PF Collier. 1976. A survey of occupational cancer in the rubber and cablemaking industries: Analysis of deaths occurring in 1972–74. Br J Ind Med 33:249–264.

Fox, AJ, DC Lindars, and R Owen. 1974. A survey of occupational cancer in the rubber and cablemaking industries: Results of a five-year analysis, 1967–71. Br J Ind Med 31:140–151.

Gamble, JF and R Spirtas. 1976. Job classification and utilization of complete work histories in occupational epidemiology. J Occup Med 18:399–404.

Goldsmith, D, AH Smith, and AJ McMichael. 1980. A case-control study of prostate cancer within a cohort of rubber and tire workers. J Occup Med 22:533–541.

Granata, KP and WS Marras. 1993. An EMG-assisted model of loads on the lumbar spine during asymmetric trunk extensions. J Biomech 26:1429–1438.

Greek, BF. 1991. Rubber demand is expected to grow after 1991. C & EN (13 May): 37-54.

Gustavsson, P, C Hogstedt, and B Holmberg. 1986. Mortality and incidence of cancer among Swedish rubber workers. Scand J Work Environ Health 12:538–544.

International Agency for Research on Cancer (IARC). 1992. 1,3-Butadiene. In IARC Monographs on the Evaluation of Carcinogenic Risks to Humans: Occupational Exposures to Mists and Vapours from Strong Inorganic Acids and Other Industrial Chemicals. Lyon: IARC.

International Institute of Synthetic Rubber Producers. 1994. Worldwide Rubber Statistics. Houston, TX: International Institute of Synthetic Rubber Producers.

Kilpikari, I. 1982. Mortality among male rubber workers in Finland. Arch Environ Health 37:295–299.

Kilpikari, I, E Pukkala, M Lehtonen, and M Hakama. 1982. Cancer incidence among Finnish rubber workers. Int Arch Occup Environ Health 51:65–71.

Lednar, WM, HA Tyroler, AJ McMichael, and CM Shy. 1977. The occupational determinants of chronic disabling pulmonary disease in rubber workers. J Occup Med 19:263–268.

Marras, WS and CM Sommerich. 1991. A three dimensional motion model of loads on the lumbar spine, Part I: Model structure. Hum Factors 33:123–137.

Marras, WS, SA Lavender, S Leurgans, S Rajulu, WG Allread, F Fathallah, and SA Ferguson. 1993. The role of dynamic three dimensional trunk motion in occupationally-related low back disorders: The effects of workplace factors, trunk position and trunk motion characteristics on injury. Spine 18:617–628.

Marras, WS, SA Lavender, S Leurgans, F Fathallah, WG Allread, SA Ferguson, and S Rajulu. 1995. Biomechanical risk factors for occupationally related low back disorder risk. Ergonomics 35:377–410.

McMichael, AJ, DA Andjelkovich, and HA Tyroler. 1976. Cancer mortality among rubber workers: An epidemiologic study. Ann NY Acad Sci 271:125–137.

McMichael, AJ, R Spirtas, and LL Kupper. 1974. An epidemiologic study of mortality within a cohort of rubber workers, 1964–72. J Occup Med 16:458–464.

McMichael, AJ, R Spirtas, LL Kupper, and JF Gamble. 1975. Solvent exposures and leukemia among rubber workers: An epidemiologic study. J Occup Med 17:234–239.

McMichael, AJ, R Spirtas, JF Gamble, and PM Tousey. 1976a. Mortality among rubber workers: Relationship to specific jobs. J Occup Med 18:178–185.

McMichael, AJ, WS Gerber, JF Gamble, and WM Lednar. 1976b. Chronic respiratory symptoms and job type within the rubber industry. J Occup Med 18:611–617.

Monson, RR and KK Nakano. 1976a. Mortality among rubber workers. I. White male union employees in Akron, Ohio. Am J Epidemiol 103:284–296.

—. 1976b. Mortality among rubber workers. II. Other employees. Am J Epidemiol 103:297–303.

Monson, RR and LJ Fine. 1978. Cancer mortality and morbidity among rubber workers. J Natl Cancer Inst 61:1047–1053.

National Fire Protection Association (NFPA). 1995. Standard for Ovens and Furnaces. NFPA 86. Quincy, MA: NFPA.

National Joint Industrial Council for the Rubber Manufacturing Industry. 1959. Running Nip Accidents. London: National Joint Industrial Council for the Rubber Manufacturing Industry.

—.1967. Safe Working of Calenders. London: National Joint Industrial Council for the Rubber Manufacturing Industry.

Negri, E, G Piolatto, E Pira, A Decarli, J Kaldor, and C LaVecchia. 1989. Cancer mortality in a northern Italian cohort of rubber workers. Br J Ind Med 46:624–628.

Norseth, T, A Anderson, and J Giltvedt. 1983. Cancer incidence in the rubber industry in Norway. Scand J Work Environ Health 9:69–71.

Nutt, A. 1976. Measurement of some potentially hazardous materials in the atmosphere of rubber factories. Environ Health Persp 17:117–123.

Parkes, HG, CA Veys, JAH Waterhouse, and A Peters. 1982. Cancer mortality in the British rubber industry. Br J Ind Med 39:209–220.

Peters, JM, RR Monson, WA Burgess, and LJ Fine. 1976. Occupational disease in the rubber industry. Environ Health Persp 17:31–34.

Solionova, LG and VB Smulevich. 1991. Mortality and cancer incidence in a cohort of rubber workers in Moscow. Scand J Work Environ Health 19:96–101.

Sorahan, R, HG Parkes, CA Veys, and JAH Waterhouse. 1986. Cancer mortality in the British rubber industry 1946–80. Br J Ind Med 43:363–373.

Sorahan, R, HG Parkes, CA Veys, JAH Waterhouse, JK Straughan, and A Nutt. 1989. Mortality in the British rubber industry 1946–85. Br J Ind Med 46:1–11.

Szeszenia-Daborowaska, N, U Wilezynska, T Kaczmarek, and W Szymezak. 1991. Cancer mortality among male workers in the Polish rubber industry. Polish Journal of Occupational Medicine and Environmental Health 4:149–157.

Van Ert, MD, EW Arp, RL Harris, MJ Symons, and TM Williams. 1980. Worker exposures to chemical agents in the manufacture of rubber tires: Solvent vapor studies. Am Ind Hyg Assoc J 41:212–219.

Wang, HW, XJ You, YH Qu, WF Wang, DA Wang, YM Long, and JA Ni. 1984. Investigation of cancer epidemiology and study of carcinogenic agents in the Shanghai rubber industry. Cancer Res 44:3101–3105.

Weiland, SK, KA Mundt, U Keil, B Kraemer, T Birk, M Person, AM Bucher, K Straif, J Schumann, and L Chambless. 1996. Cancer mortality among workers in the German rubber industry. Occup Environ Med 53:289–298.

Williams, TM, RL Harris, EW Arp, MJ Symons, and MD Van Ert. 1980. Worker exposure to chemical agents in the manufacture of rubber tires and tubes: Particulates. Am Ind Hyg Assoc J 41:204–211.

Wolf, PH, D Andjelkovich, A Smith, and H Tyroler. 1981. A case-control study of leukemia in the U.S. rubber industry. J Occup Med 23:103–108.

Zhang, ZF, SZ Yu, WX Li, and BCK Choi. 1989. Smoking, occupational exposure to rubber and lung cancer. Br J Ind Med 46:12–15.