Three enterprises failed to pass the national samp

2022-08-01
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2020 National Drawing of waterproof coiled material: 27 batches are unqualified, 3 enterprises fail to pass the spot check for two consecutive times (list attached)

2020 National Drawing of waterproof coiled material: 27 batches are unqualified, 3 enterprises fail to pass the spot check for two consecutive times (list attached), coating,

2020 National Drawing of waterproof coiled material passes through and straightens from the paper holder: 27 batches are unqualified, 3 enterprises fail to pass the spot check for two consecutive times (list attached)

january 29, 2021

january 28, The General Administration of market supervision and administration of the people's Republic of China reported "the state supervision and random inspection of the quality of 37 kinds of products such as leather shoes in 2020". The notice shows that in terms of waterproof coiled materials, 27 batches of products were found to be unqualified by national supervision and random inspection in 2020, and the unqualified discovery rate was 13.6%; Three waterproof coiled material manufacturers failed to pass the national supervision and spot check twice in 2019 and 2020

the circular pointed out that in 2020, the national supervision and spot check on the quality of waterproof coiled material products sampled 198 batches of building waterproof coiled material products produced by 197 enterprises in 20 provinces (autonomous regions and municipalities), of which 27 batches were unqualified, and the unqualified discovery rate was 13.6%

in 2020, the national supervision and spot check on the quality of waterproof coiled materials will focus on the soluble content, heat resistance, low-temperature flexibility, impermeability, tension and delay. They also want to help the steel plant operate or become more cautious in the later stage of the elimination. In addition to the existing (plastic waste) elongation, thermal aging, oil permeability, joint peel strength, tensile performance, nail rod tear strength, impact resistance, static load resistance, low-temperature bending, peel strength with post cast concrete 34 items such as dimensional change rate, tearing force, peeling strength of coiled material and coiled material, adhesion retention, peeling strength with cement mortar, thermal stability, peeling strength, re peeling strength of self-adhesive asphalt, dimensional change rate of heat treatment, right angle tear strength, trapezoidal tear strength, water absorption, tensile strength, elongation at break, and tear strength were inspected

the unqualified items in the national supervision and spot check of waterproof coiled material product quality in 2020 involve soluble matter content, thermal aging, joint peel strength of RMB 40/ton, low-temperature flexibility, peel strength, etc

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