WIDE WATERPROOF SHEET AND MANUFACTURE THEREOF

Japanese Patent JP3737210

B2

PROBLEM TO BE SOLVED: To eliminate generation of wavy wrinkles, improve an external appearance quality, and prevent the occurrence of upward parting and the degradation of wind resistance even if it is laid on a backing by setting a heat history almost constant over the whole area of a wide waterproof sheet, and setting a difference between a maximum value and a minimum value within a prescribed value on the heat history.
SOLUTION: A rubber sheet 2a is sandwiched between upper and lower metal molds 6 and 7, and pressurized heating is performed. A position of the rubber sheet is dislocated, and a place on which pressurized heating is not yer performed is arranged between the upper and lower metal molds 6 and 7, and pressurized heating is performed. Then, it is repeated until the whole pressurized heating is finished according to a width of an original textile part 5 up to a joint part 3. Then, one side of the rubber sheet to be connected is arranged on the metal mold 6, and a cure tape 4 is interposed in the joint part 3 of an end part, and the other end part is superposed, and pressurized heating is performed through a cushion material 8, and a heat history is almost uniformized. At this time, a difference between a maximum value and a minimum value is set within 21 OK.hr. Therefore, generation of wavy wrinkles is prevented, and waterproof performance is improved, and external appearance can also be extremely improved.

Yoshitaka Higashida
Yuji Okiyoshi

JP21926396A

January 18, 2006

July 31, 1996

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Mitsuboshi Belting Co., Ltd.

E04D5/12; (IPC1-7): E04D5/12

JP49126975A
JP62126924U

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