Characteristics and construction method of polyurethane prefabricated thermal insulation

Polyurethane preforms are prefabricated rigid foam polyurethane insulation modules, which mainly include female corner prefabricated modules, positive corner prefabricated modules, and door and window corner prefabricated modules and plates, which can be applied to doors, windows, and openings. Polyurethane preforms have the following characteristics:

1. Polyurethane preforms have low thermal conductivity and good insulation properties;

2, with polyurethane adhesive, high bond strength;

3, polyurethane prefabricated parts from the standard thickness control effect;

4, polyurethane preforms to meet the flame-retardant performance requirements.

Polyurethane preform performance indicators:

item       Head

single    Bit

Technical indicators

density

Kg/m3

25 to 50

Compression strength (strength at yield point or when deformed by 10% )

kPa

≥ 150

tensile strength

kPa

≥ 150

Thermal Conductivity

w/(m · k)

≤ 0.025

Dimensional stability ( 70 °C, 48h )

%

≤ 5

Water vapor transmission coefficient

(temperature ( 23 ± 2 )°C, relative humidity 85% )

Ng/ ( Pa · m · s )

≤ 6.5

Water absorption ( V/V )

%

≤ 3

Flammability

Level 1

Vertical combustion method

Average burning time

s

≤ 30

Average combustion height

Mm

≤ 250

Polyurethane preform construction method:

After entering the construction site and passing the re-inspection, according to the requirements of the construction plan, the yin and yang angles, door and window openings and other parts shall be bonded with polyurethane prefabricated blocks. Pay attention to avoid open flames such as welding to avoid fire.

1. Reference amount of polyurethane preform: 0.15m2/m2

2. Precautions for construction of polyurethane preforms:

Avoid contact with open fire during storage and transportation construction;

Polyurethane preforms are prohibited from exposure to open air, rain, and exposure to chemicals.

Polyurethane prefabricated parts must not be heavily crushed or collided with sharp objects to prevent damage or deformation. Rubber and plastic, rock wool board, rock wool composite board   Hebei Honghong Insulation Material Factory http://