Introduction of pu foam

Introduction of pu foam

Pu foam is made of isocyanate and polyether as the main raw materials. Under the action of various additives such as blowing agent, catalyst, flame retardant, etc., it is mixed by special equipment and foamed on-site by high-pressure spraying. Things.
  Polyurethane foam has two types: soft foam and hard foam. Soft foam has an open-cell structure, and hard foam has a closed-cell structure; soft foam is divided into two types: crust and non-crust.
The main function of soft polyurethane foam is cushioning. Polyurethane soft foam is often used in sofa furniture, pillows, cushions, toys, clothing and sound insulation linings.
Pu foam is a new type of synthetic material with thermal insulation and waterproof functions. Its thermal conductivity is low, only 0.022~0.033W/(m*Κ), which is equivalent to half of the extruded board and the lowest thermal conductivity of all thermal insulation materials. of. Rigid polyurethane foam is mainly used in building exterior wall insulation, integrated roof waterproof and thermal insulation, cold storage insulation, pipeline insulation materials, building boards, refrigerated trucks and cold storage insulation materials.

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Why Choose JOINTAS?

Pre-sales Support

Pre-sales Support

1. Design consultation 2. Drawing review 3. Sealant recommendation 4. Substrate experiment: compatibility test, adhesion test, pollution test 5. Solution (sealant seam decoration)

In-sales Support

In-sales Support

1. Construction training 2. Process supervision 3. Special treatment 4. Rubber cutting spot check

After-sales Support

After-sales Support

1. Issuing quality assurance documents 2. Project return visits


We Have The Best Solutions for Your Business

Jointas Chemical is listed company specialized in R&D, manufacture and sale of Eco-friendly silicone sealant, thermal paste and water based paints&coatings founded in 1989, China.

We Provide acrylic sealant,anti corrosion coatings, silicone adhesive, construction sealant, silicone caulk, house paint, interior paint, insulating glass sealant, industrial paint, gutter sealant, gap filler, grout sealant, construction adhesive bathroom sealant, waterborne coatings, water-based coating for steel structure,silicone structural, silicone sealant, ms sealant, pu sealant, pu foam, polyurethane sealant, anti corrosion paint, weather sealant, If you feel interested in them ,You can browse related products and initiate consultations on our website.

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Application range of pu foam

Business areas of this product: door and window engineering installation, home decoration, etc.
1. Seal and fix wooden, plastic steel, aluminum alloy and other metal door and window frames.
2. Wrap sealed cables and wire boxes, air conditioning pipes, and heat preservation hot and cold water pipes.
3. Fill the voids in the masonry building; fill the voids in the hull.
4. Home repairs: filling holes and gaps, repairing floor tiles and floors.
5. Landscaping and gardening: flower arrangement, gardening, setting, light and beautiful.
6. Advertising exhibition: model, sand table manufacturing, exhibition board repair.
7. Packaging and transportation: Wrap valuable and fragile commodities instantly.
8. Refrigeration air-conditioning: caulking, sealing and heat preservation around the cold storage and air-conditioning unit.

User Reviews

What users say about JOINTAS

The sealant has a fine texture and no bubbles, and the taste is very small. It is very convenient to use and dries very fast. The instructions are very detailed. The effect is good after using it.


The packaging of this product is very good, very strict, and the design is very scientific.


The product I bought is really good. The other ones I bought before have a lot of particles in it. They are not smooth to the touch. I don’t know how to use it, and the beauty stitches I bought make it. I really don’t have to say.


The effect is very good! The smell is very small, almost no smell during construction.


The quality is very good. I made it at home by myself. It's okay. The effect is good. The quality is indeed better than the price bought in other stores.


The smell is very small, the gel is translucent, it is smooth to use, and it dries quickly. The anti-mildew effect needs time to test.

Frequently Asked Question

Do you have any question?

1. Increase the total surface area of the bubble, that is, increase the free energy. 2. When the bubble liquid film wall becomes thinner, reduce the surface excess amount of adsorbed components, increase the surface tension, increase the free energy required to increase the surface area, and prevent the liquid film wall from thinning and breaking. 3. Increasing the viscosity of the material can effectively delay the thinning of the bubble film wall. This factor is the most important. Within 40-60s of the polyurethane foam foaming reaction, the influence of this factor will exceed other factors. 4. The double-sided electrical effect of the bubble liquid film also has a certain effect on the thinning of the liquid film.

1. The liquid film is dispersed due to the capillary action of the liquid film, and the dispersion phenomenon caused by gravity has the greatest impact. 2. The surface tension of the liquid film on the bubble wall is reduced due to the hot spots on individual parts or the presence of defoaming additives. 3. The van der Waals force between the surface of the bubble liquid film increases the tendency of the liquid film to thin. When the liquid film is very thin, its effect is more obvious.

Good thermal insulation performance, good waterproof performance, good bonding performance, suitable for new roofing or old roof repair, especially old roof repairing, no need to remove the original waterproof layer and insulation layer, just remove the ash and sand on the surface It can be sprayed, the construction is simple and fast, the closing structure is simple, the economic benefit is good, and the aging resistance is good.

Our updates and blog posts

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{keyword},If you have installed doors, windows or toilets in your home, you may find that the decoration master will apply a layer of glue to the connection between doors,

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{keyword},At the exhibition site, industry experts, association leaders and other professionals explored the exhibition of Antai Electronic Adhesives to discuss hot issues in the industry.

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