ADHESIVE TAPE AND METHOD FOR USING ADHESIVE TAPE

To provide an adhesive tape which has excellent followability and transparency and high weather resistance and can prevent the deterioration of adhesive strength even after long-term use outdoors.SOLUTION: There is provided an adhesive tape for a concrete structure or a structure having a rusted part, which is an adhesive tape comprising a base material and an adhesive layer provided on at least one surface of the base material, wherein the adhesive tape has a difference between the tensile load at 2.5% elongation and the tensile load at 0.5% elongation of 1.3 N/mm or less and has a tensile elongation at break of 100% or more, the total light transmittance of the adhesive tape is 50% or more after performing the accelerated weather resistance test according to cycle A in JIS K5600-7-7 for 500 hours, the peeling angle obtained by bonding the adhesive tape to a stainless steel plate through the adhesive layer after performing the accelerated weather resistance test for 500 hours is 180 degree, the base material does not break in a peeling test conducted under the condition of a peeling speed of 300 mm/minute and the adhesive strength of the adhesive layer is 20 N/25 mm or more.SELECTED DRAWING: None 【課題】追従性及び透明性に優れ、かつ耐候性が高く、屋外で長期使用しても粘着力の劣化が防止できる粘着テープを提供すること。【解決手段】基材と、前記基材の少なくとも片面に設けられる粘着剤層とを備える粘着テープであって、前記粘着テープは、２．５％伸長した時の引張荷重と、０．５％伸長した時の引張荷重との差が１．３Ｎ／ｍｍ以下であり、かつ引張破断点伸度が１００％以上であり、ＪＩＳ Ｋ５６００－７－７におけるサイクルＡに準拠した促進耐候性試験を５００時間実施した後において、前記粘着テープの全光線透過率が５０％以上であり、前記促進耐候性試験を５００時間実施した後に前記粘着剤層を介してステンレス板に貼り合わせて剥離角度１８０°、剥離速度３００ｍｍ／分の条件で行う剥離試験において前記基材が破断せず、前記粘着剤層の粘着力が２０Ｎ／２５ｍｍ以上である、コンクリート構造体用又は錆部を有する構造体用の粘着テープ。【選択図】なし