Patent ID: 9597855
Date: 2017-03-21
CPC Classifications: A61F,B32B,Y10T

Claim:
1. A composite stretch material which is comprised of a first nonwoven fabric sheet part and second nonwoven fabric sheet part which are superposed over each other, and elastic members which are arranged between the first nonwoven fabric sheet part and the second nonwoven fabric sheet part, wherein each of the nonwoven fabric sheet parts is formed with concave parts and convex parts in a thickness direction of the nonwoven fabric sheet part, the concave parts and the convex parts are alternately repeatedly formed in a first direction and respectively extend in a second direction perpendicular to the first direction, so as to define convex-concave rows, the convex-concave rows are separated from each other by non-shaped regions which extend continuously along the first direction without including the concave parts and the convex parts, the convex parts project out from thickness direction positions of corresponding non-shaped regions of the nonwoven fabric sheet parts, the concave parts which are formed between two of the convex parts which adjoin each other reach thickness direction positions of the non-shaped regions, the first nonwoven fabric sheet part and the second nonwoven fabric sheet part are superposed so that the non-shaped regions face each other while the convex parts of the first nonwoven fabric sheet part face the second nonwoven fabric sheet part and the convex parts of the second nonwoven fabric sheet part face the first nonwoven fabric sheet part and the elastic members are arranged in a state stretched in the first direction between the aligned non-shaped regions, the aligned non-shaped regions are joined through elastic members, and the convex parts of the first nonwoven fabric sheet part enter respectively into the insides of the concave parts of the second nonwoven fabric sheet part and the convex parts of the second nonwoven fabric sheet part enter respectively into the insides of the concave parts of the first nonwoven fabric sheet part, and wherein certain intervals are opened between a flat facing in the non-shaped regions of the first nonwoven sheet and the non-shaped regions of the second nonwoven fabric sheet part, and the elastic members are placed in spaces which are defined at the certain intervals between the flat facings in the non-shaped regions of the first nonwoven fabric sheet part and the non-shaped regions of the second nonwoven fabric sheet part, while the concave parts and the convex parts extended in the second direction of the convex-concave rows which are discontinued with the spaces.