Surface fastener, cushioning structure, and seat structure

A surface fastener which is used while stacked on a cushioning member to fix a covering member to the cushioning member that is to be covered,

• the surface fastener being formed of a synthetic resin and comprising an integrally molded base with a 0.1 to 0.9 mm thickness and an engagement element group including at least one engagement element row composed of a plurality of protruding engagement elements with a 0.2 to 0.8 mm protrusion height arranged in a row on one surface of the base,
• wherein a resistance value of the surface fastener as measured by a handle-o-meter method conforming to the JIS L 1096 E method is within an 80 to 150 g range, and
• wherein, when a load value is 40 N or more, a hysteretic characteristic of a load-deflection graph which is obtained when a pressure up to 100 N is applied to a stack of the surface fastener and the cushioning member by a pressure plate with a 30 mm diameter is within a ±5% range of a hysteretic characteristic of a load-deflection graph which is obtained when the pressure is applied only to the cushioning member under the same condition, and a spring constant of the surface fastener by itself is 0.5 N/mm or less.