Canvas shoe sole

VII. Canvas Shoe Sole Adhesive 60% NR latex (LA-TZ type)... 

The injection-compression process is an important variation in which rubber is injected into a partly closed mould under low pressure used for moulding-on of rubber soles to footwear uppers. Rubber is injected into a gap between the shoe upper and the sole plate, which is held 3-4 mm wider than it would be in its final position. After injection at the first mould station of a multistation machine the sole plate is closed in the manner of compression moulding at the second mould station and rubber is pressed along the sole and over the toe cap. The importance of the process is that it becomes possible to mould without using normal high injection pressures which tear and distort canvas, leather or synthetic uppers. 

A review is presented of recent developments in sports shoes today s trainers, which come in all colonrs and shapes, with mnltilayer, multicolonr soles for comfort and aesthetic appeal, replace the former black canvas plimsoll with rnbber sole. Shoes are now designed specifically with each sport in mind, although they have essentially the same basic design with variations in the composition of the sole. 

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