What Is Foam Sealant?

The full name of polyurethane foam adhesive is one-component polyurethane foam sealant, commonly known as foaming agent, foam rubber, PU sealant, PU FOAM in English is the cross-product of aerosol technology and polyurethane foam technology.

Polyurethane foam

Full name of polyurethane foam

Polyurethane foam is a kind of

Generally, the surface drying time is about 10 minutes (at room temperature 20 ° C), and the total drying time varies with ambient temperature and humidity. Generally, the total drying time in summer is about 4-6 hours, and in winter it is about 24 hours. Or even longer. Under normal use conditions (and in the case of a cover on its surface), its service life is estimated to be not less than ten years, and the cured foam maintains good elasticity and adhesion in the temperature range of -10 ° C to 80 ° C. force. The cured foam has functions of caulking, bonding and sealing. Flame retardant

Door and window installation: The joints between doors and windows and the wall are sealed, fixed and bonded.

Advertising model: production of models and sandboxes, repair of display boards.

Sound insulation and muffling: The gaps in the decoration of the voice room and the broadcasting room can be filled with sound insulation and muffling.

Horticulture: Flower arrangement, horticulture, light and beautiful.

Daily maintenance: holes, gaps,

Before construction, the oil and dust on the construction surface should be removed, and a small amount of water should be sprayed on the construction surface. Before use, place

Construction Notes

Policy-oriented

Since the popularization and application of 2000 products in China, its market demand has rapidly expanded. In 2009, the annual consumption of the national construction market has exceeded 80 million cans. With the improvement of building quality requirements and the promotion of energy-saving buildings, these products The amount will continue to increase steadily in the future.

At present, China has fully mastered the formulation and production technology of this type of product, and has generally adopted fluorine-free foaming agents that do not damage the ozone layer, and has developed products for front foaming (1). Except that some manufacturers still use imported valve accessories, other supporting raw materials have been localized.

Remarks: (1) The so-called front foaming means that 80% of the polyurethane foaming agent has been foamed after spraying, and the rear foaming margin is small, so that the workers can master the hands well when using the foaming gun. The effort is simple and convenient without waste of glue, which greatly saves costs. Post-foaming is that the gum gradually thickens after spraying, and is several times thicker than when it is punched out. This makes it difficult for the worker to grasp the strength of the trigger, which is easy to waste the glue, at least 1/3. Doors and windows can be easily damaged after the glue is cured.