日韩国产精品区一区二区,日本欧美国产亚洲国产韩国,亚洲欧美另类成人综合网,亲子乱高潮1000部,午夜国产精品a小视频

To determine the quality of air conditioning and solar insulation materials, a comprehensive evaluation is required from multiple key indicators. The following are specific criteria and methods for judgment:

fire resistance

Fire rating is the core indicator, and national standards classify materials into Class A (non combustible), Class B1 (flame retardant), Class B2 (combustible), and Class B3 (flammable). High quality insulation materials usually need to reach B1 level, which means they are flame retardant and self extinguishing when leaving the fire. They can be identified by the "B1 level" markings on the product surface or packaging. For example, Green Vine B1 grade rubber sheet (MCP4) and Yuyi B1 grade insulation cotton (MCP3) both meet this standard.

Physical properties

Density and pore structure: Materials with high density, fine and uniform pores have better insulation effect, stronger compression resistance and durability. It can be determined through extrusion testing that high-quality materials are not easily deformed after being compressed.

Thermal conductivity: The lower the coefficient, the better the insulation performance. It is necessary to comprehensively evaluate environmental factors such as temperature and moisture content.

Moisture resistance: The material should have a low water absorption rate to avoid an increase in thermal conductivity due to moisture, which may affect the insulation effect. For example, the flame retardant design of GJXBP rubber tube (MCP_2) helps prevent moisture.

Installation and usage characteristics

Adhesive strength and tensile strength: Ensure that the material is firmly attached to the pipeline or roof, avoiding hollowing and detachment.

Breathability: Balance insulation and moisture removal to prevent wall condensation or indoor air turbidity.

Temperature resistance range: Solar insulation materials need to withstand high temperatures, such as rubber and cotton, which can usually withstand temperatures ranging from -40 ℃ to 105 ℃.

Appearance and Identification

Surface craftsmanship: High quality materials have a smooth surface without impurities, such as B1 grade rubber sheets that often present a rough texture.

Packaging and Certification: Check whether the product packaging indicates the brand, certificate of conformity, and fire rating, and avoid selecting products without labeling or with rough packaging.

Service and cost-effectiveness

Choose products that provide comprehensive after-sales support, such as 7-day no reason return, free on-site return and exchange, etc. Comparing price and performance, for example, Weipeng Shuangxing B1 grade rubber sheet (MCP_5) is suitable for large-scale projects, while Green Man (MCP_10) and Yuyi (MCP_9) are suitable for small-scale household use.

Summary: High quality insulation materials need to balance fire resistance, physical properties, installation adaptability, and environmental friendliness. It is recommended to prioritize products with B1 grade, high density, and low water absorption, and pay attention to brand reputation and after-sales service.

Green vine B1 grade rubber board insulation board insulation board sun protection insulation material roof insulation cotton sunroom insulation cotton black b1 flame retardant 20mm self-adhesive adhesive without aluminum plate 1 ㎡

Free on-site return and exchange, advance claims, lightning refund, fast review, late claim, 7-day no reason return support, 30 day price insurance, 180 day return and exchange, damaged package return and exchange