• The tire
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• s.30
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• pp.6-17
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• 1970

• The tire
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• s.6
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• pp.19-23
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• 1967

• Journal of Adhesion and Interface
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• v.3 no.2
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• pp.40-44
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• 2002

We invested effect of the keeping-time of uncured composite and thermal aging, of cured composite on adhesive strength for rubber-brass coated steel cord composite in this study. We also evaluated how the adhesive strength affects to tire endurance. Using PAD adhesion specimen, peel adhesive strength was measured. The uncured composite was kept for several days up to 35 days in factory. Cured composite was also kept for 5 and 10 days at $85^{\circ}C$ in dry oven. Peel adhesive strength was decreased with increasing keeping-time and showed lower value with increasing thermal aging time. The lower peel adhesive strength, the lower tire-endurance. This fact was caused by the humidity and thermal aging which affected in the decrease of adhesive strength of the rubber-steel cord composite and resulted in interface fracture between rubber and steel cord. This phenomenon was confirmed from SEM investigation and tire-endurance. It was just known that corrosion of steel cord's surface and aging of adhesive layer strongly affected to decrease of adhesive strength. This resulted in directly decreasing tire-endurance.

• The tire
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• s.46
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• pp.7-12
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• 1973

자동차타어어가 상품인이상 경제효율을 도외시 하고선 만들수가 없다. 그래서 더욱 성능이 높은 타이어를 어떻게 해서 싸게 만들수 있느냐 가 큰문제로 된다. 한때는 가장 손이 많이드는 성형부문의 합리화가 타이어 매스푸로화에의 큰 과제이였다. 그것이 잇따라서 가류부문에도 파급했다. 여기에 등장하는것이 자동성형기 이기도 하고 백오마틱푸래쓰이 기도 했으나 그것들이 오늘날의 타이어제조의 전부는 아니다. 3류배우적 이기는 하나 가류촉진제의 이룩한 쳑할의 중요성도 잊어서는 안된다고 생각한다. 그래서 금번은 타이어 약품의 대상인 화학회사 가우화학(주)에 부탁해서 가류촉진제와 노화방지제를 중심으로 각종의 해설을 구했다. 이에 의하면 가류촉진제가 발견되어서 70년 그 진보에는 현저한것이 있었으나 챠알스 굳이어가 133년전에 발견한 류황을 사용해서의 가류법이 상금사용되고 있는 한 금후특히 괄목할 타이어 약품의 출현도 곤란할 것 같다고 하고 있다. 따라서 약품매이커어로서는 더욱 고도화에의 노력은 해도 고무 그 자체를 다르게 한다거나 타이어의 제조법을 근본적으로 개조하지 않는 한에 있어서는 말이다.

• Journal of Adhesion and Interface
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• v.4 no.1
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• pp.28-34
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• 2003

Steel tire cords were subjected to plasma polymerization coating of acetylene in order to enhance the adhesion to rubber compounds. Plasma polymerization coating was varied to plasma polymerization coating of acetylene, argon plasma etching+plasma polymerization, or argon plasma. etching+plasma polymerization with Ar carrier gas. Adhesion was evaluated via TCAT samples and compared to those with brass coated tire cord. For durability study, plasma polymer cooled tire cords were aged in lab atmosphere for 1, 3, 5, 10 or 15 days, while TCAT specimens prepared with plasma polymer coated tire cords were aged in distilled water, 10% NaCl solution or $100^{\circ}C$ oven for 1, 2, 3 or 4 weeks. After testing, failure surfaces were analyzed with SEM/EDX. Among the treatments, the highest adhesion was obtained by Ar etching+acetylene plasma. polymerization coating with Ar carrier gas, providing almost same pull-out force as the brass coated tire cords. Upon the aging of the tire cords in the lab atmosphere, brass coated tire cords provided better adhesion than plasma polymer coated tire cords, while the TCAT samples with plasma polymer coated tire cords exhibited similar or slightly superior durability to those with brass coated tire cords.

• Elastomers and Composites
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• v.34 no.2
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• pp.128-134
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• 1999

Steel tire cords were coated via RF plasma polymerization of acetylene and butadiene gas in order to enhance adhesion to rubber compounds. Adhesion of tire cords was measured by TCAT and T-test as a function of type of gas, plasma powder, treatment time, gas pressure and Ar gas etching. Some samples were subjected to aging study in distilled water at $80^{\circ}C$ for a period of 7 days. After testing, tire cords were analysed by SEM to elucidate the adhesion mechanism. The highest adhesion values were obtained at 20W, 2min and 25mtorr for acetylene plasma polymerization, and l0W, 4min, 25mtorr for butadiene plasma polymerization. However, Ar plasma etching did not affect adhesion, while the adhesion of tire cords increased rather than decreased, contrary to expectations. It was not possible to elucidate failure mode by SEM, owing to the rough surface of the tire and the thin plasma polymer coating layer.

• International Journal of Highway Engineering
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• v.2 no.1
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• pp.123-133
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• 2000

The asphalt mixture with CRM(Crumb Rubber Modifier) is known to show a better performance in resisting thermal cracking, fatigue cracking, and rutting compared with the conventional mixture. In this research, the lab tests on the physical and the mechanical characteristics of the domestic crumb rubber modified asphalt binder and conventional asphalts (AP-3, AP-5) were conducted. The physical test results show that CRM asphalt has better physical characteristics than that of conventional asphalts. The dynamic shear rheometer test results in high temperature show that CRM asphalt has higher complex shear modulus and aging resistance than those of conventional asphalts. And, the bending beam rheometer in low temperature test results show that CRM asphalt has higher resistance to thermal cracking than that of conventional asphalts.