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    Home > Coatings News > Paints and Coatings Market > Coating standard: the quality of 14 batches of unqualified coating is worrying

    Coating standard: the quality of 14 batches of unqualified coating is worrying

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: Recently, the Municipal Administration of industry and commerce actively organized forces to monitor the quality of 60 batches of interior wall coating and waterproof coating sold in some building materials supermarkets, shopping malls and comprehensive trading markets

    After testing, 14 batches were unqualified, including 6 batches of interior wall coating and 8 batches of waterproof coating

    The unqualified rate was 23.3%

    The unqualified items of interior wall coating are washability and contrast ratio, and the unqualified items of waterproof coating are water impermeability, tensile strength, elongation at break, etc

    First, the washability is unqualified, with 6 batches, and the contrast rate is unqualified, with 1 batch, of which the above two indexes are not the same Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd

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    We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: Recently, the Municipal Administration of industry and commerce actively organized forces to monitor the quality of 60 batches of interior wall coatings and waterproof coatings sold in some building materials supermarkets, shopping malls and comprehensive trading markets

    After testing, 14 batches were unqualified, including 6 batches of interior wall coating and 8 batches of waterproof coating

    The unqualified rate was 23.3%

    The unqualified items of interior wall coating are washability and contrast ratio, and the unqualified items of waterproof coating are water impermeability, tensile strength, elongation at break, etc

    First, the washability is unqualified, there are 6 batches, the contrast rate is unqualified, there is 1 batch, among which, if the above two indicators are unqualified at the same time, there is 1 batch

    Washability and contrast ratio are two important technical indexes of interior wall coating

    The indexes are unqualified, interior wall coating is not washable, covering effect is poor, and lack of proper protection and decoration functions

    For example, the "Yongxin" brand synthetic resin emulsion interior wall coating (model specification: super white interior wall), which is sold in Shanghai Hao Ke building materials Co., Ltd., which is sold in Shanghai Hao Mei building materials market, is sold in Shanghai Hao Mei building materials market, Jiading District, China

    The measured value of scouring resistance is 15 times (the national standard is the lowest, not less than 300 times), and the quality of goods is very poor

    Second, the water impermeability is unqualified, with three batches

    Impermeability refers to the performance of waterproof coating without leakage in a certain water pressure and a certain period of time

    It is the main quality index of waterproof coating

    The monitoring found that Shanghai Xinsheng Trade Co., Ltd., which was sold in the Shanghai building decoration market, was named "Niu Yuan" brand polymer emulsion building waterproof coating, which was sold by Shanghai Niu Yuan Industry and Trade Co., Ltd.

    The samples can not be film-forming, and many indicators such as water impermeability can not be detected, the quality is poor, and the function of waterproof coating is completely lost

    Third, the tensile strength is unqualified, with 4 batches; the elongation at break is unqualified, with 5 batches

    Tensile strength and elongation at break are two main mechanical properties of waterproof coating

    The waterproof coating must have certain strength and extensibility after film forming, so as to have a better shielding effect on the cracks of the base course

    Even if the base course has small cracks due to external temperature difference, dry and wet factors, the coating will not break and leak, so as to ensure the waterproof effect

    According to the monitoring, the "Langqiao" polyurethane waterproof coating produced by Shanghai Quanshi waterproof materials Co., Ltd

    is sold in Jinlu building materials market by Dingfeng building materials store, Putuo District, Shanghai

    The measured tensile strength is 0.43mpa (the standard value should be ≥ 1.90mpa), the measured elongation at break is 10% (the standard value should be ≥ 450%), and the quality is extremely poor

    Fourth, the low tenderness is unqualified, with 4 batches

    Low temperature flexibility reflects the flexibility of waterproof coating at low temperature, which is not qualified

    The temperature resistance of waterproof coating is poor after film-forming, which is easy to produce cracks and lose waterproof effect

    In addition, the phenomenon of nonstandard outer package identification of some waterproof coatings is still serious

    Some commodities are not marked with component proportion according to the standard, and some commodities are not marked with product model

    [consumption reminder] latex paint is recommended for interior wall coating 1、 When purchasing the coating, check the packaging identification, such as product model, product standard number (including type and quality grade), net content, name and address of the manufacturer, production date and batch, effective storage period (shelf life), product certificate, brief instructions and precautions, etc

    when purchasing the coating, it must be within the shelf life, such as mildew, agglomeration, caking, precipitation, etc

    found after opening It means that the paint has deteriorated and cannot be used

    2、 The coating can be selected correctly according to the use environment, such as the wet parts of kitchen and toilet, which should be waterproof, mildew proof and easy to wash

    The other walls should be selected with good decoration effect, fine coating, not easy to be powdered and scrub resistant coating

    Interior wall coatings recommended to buy synthetic resin emulsion interior wall coatings

    Interior wall coatings can be divided into water-soluble resin interior wall coatings and synthetic resin emulsion interior wall coatings (commonly known as latex paints)

    Water soluble resin interior wall coating is cheap, nontoxic, odorless and convenient for construction, but it is not water-resistant and alkali resistant

    The coating is easy to peel off and turn yellow after being damped

    It is mostly used in medium and low grade rooms or temporary rooms

    The latex paint has rich colors, good adhesion with the base, fast drying, scrubbing resistance, safety and low toxicity, convenient for construction, and easy for maintenance and renovation

    It is recommended to buy environmentally friendly waterproof coating

    A small amount of polyurethane waterproof coating on the market is tar type, contains solvent, and smells great

    Although the price is low, it will give off harmful odors for a long time and endanger human health

    It is recommended to choose waterproof coatings with better quality and environmental protection, such as solvent free polyurethane waterproof coating, polymer cement waterproof coating and polymer emulsion building waterproof coating

    Recently, the Municipal Administration for Industry and commerce actively organized forces to monitor the quality of 60 batches of interior wall coating and waterproof coating sold in some building materials supermarkets, shopping malls and comprehensive trading markets

    After testing, 14 batches were unqualified, including 6 batches of interior wall coating and 8 batches of waterproof coating

    The unqualified rate was 23.3%

    The unqualified items of interior wall coating are washability and contrast ratio, and the unqualified items of waterproof coating are water impermeability, tensile strength, elongation at break, etc

    First, the washability is unqualified, there are 6 batches, the contrast rate is unqualified, there is 1 batch, among which, if the above two indicators are unqualified at the same time, there is 1 batch

    Washability and contrast ratio are two important technical indexes of interior wall coating

    The indexes are unqualified, interior wall coating is not washable, covering effect is poor, and lack of proper protection and decoration functions

    For example, the "Yongxin" brand synthetic resin emulsion interior wall coating (model specification: super white interior wall), which is sold in Shanghai Hao Ke building materials Co., Ltd., which is sold in Shanghai Hao Mei building materials market, is sold in Shanghai Hao Mei building materials market, Jiading District, China

    The measured value of scouring resistance is 15 times (the national standard is the lowest, not less than 300 times), and the quality of goods is very poor

    Second, the water impermeability is unqualified, with three batches

    Impermeability refers to the performance of waterproof coating without leakage in a certain water pressure and a certain period of time

    It is the main quality index of waterproof coating

    The monitoring found that Shanghai Xinsheng Trade Co., Ltd., which was sold in the Shanghai building decoration market, was named "Niu Yuan" brand polymer emulsion building waterproof coating, which was sold by Shanghai Niu Yuan Industry and Trade Co., Ltd.

    The samples can not be film-forming, and many indicators such as water impermeability can not be detected, the quality is poor, and the function of waterproof coating is completely lost

    Third, the tensile strength is unqualified, with 4 batches; the elongation at break is unqualified, with 5 batches

    Tensile strength and elongation at break are two main mechanical properties of waterproof coating

    The waterproof coating must have certain strength and extensibility after film forming, so as to have a better shielding effect on the cracks of the base course

    Even if the base course has small cracks due to external temperature difference, dry and wet factors, the coating will not break and leak, so as to ensure the waterproof effect

    According to the monitoring, the "Langqiao" polyurethane waterproof coating produced by Shanghai Quanshi waterproof materials Co., Ltd

    is sold in Jinlu building materials market by Dingfeng building materials store, Putuo District, Shanghai

    The measured tensile strength is 0.43mpa (the standard value should be ≥ 1.90mpa), the measured elongation at break is 10% (the standard value should be ≥ 450%), and the quality is extremely poor

    Fourth, the low tenderness is unqualified, with 4 batches

    Low temperature flexibility reflects the flexibility of waterproof coating at low temperature, which is not qualified

    The temperature resistance of waterproof coating is poor after film-forming, which is easy to produce cracks and lose waterproof effect

    In addition, the phenomenon of nonstandard outer package identification of some waterproof coatings is still serious

    Some commodities are not marked with component proportion according to the standard, and some commodities are not marked with product model

    [consumption reminder] latex paint is recommended for interior wall coating 1、 When purchasing the coating, check the packaging identification, such as product model, product standard number (including type and quality grade), net content, name and address of the manufacturer, production date and batch, effective storage period (shelf life), product certificate, brief instructions and precautions, etc

    when purchasing the coating, it must be within the shelf life, such as mildew, agglomeration, caking, precipitation, etc

    found after opening It means that the paint has deteriorated and cannot be used

    2、 The coating can be selected correctly according to the use environment, such as the wet parts of kitchen and toilet, which should be waterproof, mildew proof and easy to wash

    The other walls should be selected with good decoration effect, fine coating, not easy to be powdered and scrub resistant coating

    Interior wall coatings recommended to buy synthetic resin emulsion interior wall coatings

    Interior wall coatings can be divided into water-soluble resin interior wall coatings and synthetic resin emulsion interior wall coatings (commonly known as latex paints)

    Water soluble resin interior wall coating is cheap, nontoxic, odorless and convenient for construction, but it is not water-resistant and alkali resistant

    The coating is easy to peel off and turn yellow after being damped

    It is mostly used in medium and low grade rooms or temporary rooms

    The latex paint has rich colors, good adhesion with the base, fast drying, scrubbing resistance, safety and low toxicity, convenient for construction, and easy for maintenance and renovation

    It is recommended to buy environmentally friendly waterproof coating

    A small amount of polyurethane waterproof coating on the market is tar type, contains solvent, and smells great

    Although the price is low, it will give off harmful odors for a long time and endanger human health

    It is recommended to choose waterproof coatings with better quality and environmental protection, such as solvent free polyurethane waterproof coating, polymer cement waterproof coating and polymer emulsion building waterproof coating

    Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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