One-component polyurethane sealant for joint caulking of municipal sewage pipes
Publisher: Oriental Rubber Industry Time：3/1/2022 5:42:16 PM hot:
The difference between one-component polyurethane sealant and water-swellable water-stop glue
1. The one-component polyurethane sealant relies on sealing and waterproofing, and does not have expansion properties, so it is more suitable for use in relatively regular gaps.
2. On the basis of sealing and waterproofing, the water-swelling water-stop glue has the performance of water-swelling. When used in irregular gaps, it can use its own expansion to fill the gaps to achieve further waterproofing.
3. Relatively speaking, the price of one-component polyurethane sealant is lower, and the price of water-swellable water-stop glue is higher.
4. Most of the one-component polyurethane sealants are packaged in cartons, and the water-swelling water-stop adhesive is packaged in hoses, 600 ml/piece.
Advantages of using one-component polyurethane sealant:
For technical guidance of one-component polyurethane sealant and manufacturers of water-stop glue, please look for Baize Rubber and Plastic Company. Our company's one-component polyurethane sealants are tested in batches to ensure that each batch of products meets the standards. One-component polyurethane sealant 600ml/piece, the quality of the one-component polyurethane sealant produced by our factory is up to standard and the price is cheap.
One-component polyurethane sealant accelerated curing method:
1. When curing is required to be slightly faster: manually apply one-component polyurethane sealant with a serrated scraper, spray water mist on the glue surface after applying the glue, and then use a scraper to scrape the glue surface once after spraying the water mist. (The purpose is to fully mix the water and the adhesive) to composite the adherend, stack the composite sheets, and then press together. (generally 4 to 5 hours curing)
2. When fast curing speed is required: manually apply one-component polyurethane sealant with a serrated scraper, and spray water mist with catalyst on the glue surface after gluing (after spraying the water mist, the scraper can also be used for The rubber surface is scraped once), and then compound pressure.
3. When curing is required faster: manually apply glue with a serrated scraper, spray water mist with catalyst on the glue surface after gluing, and then use a scraper to scrape the glue surface once after spraying the glue. The sticky substance was then sent to a press with a heating device, the temperature was controlled at 60°C, and the pressing time was 15 minutes.
Attachment: One-component polyurethane sealant is cured by moisture, no matter whether it is heated or not, it cannot be cured without moisture.
What are the technical indicators of one-component polyurethane sealant?
One-component polyurethane sealants basically have density (g/cm3), tensile strength (MPa), hardness, shear strength (MPa), elongation at break (%), surface dry time (min), etc. , High modulus means high strength, low modulus means low strength; one-component means using one component, and two-component means that two components need to be mixed evenly in a certain proportion before use. One-component polyurethane sealant is a solvent-free one-component room temperature curing sealant. The sealant is in paste form and can be squeezed out or applied by spread. There is sag resistance, inlay vertical seams and top seams do not flow. The cured adhesive layer is rubbery and elastic. Adhesion to metal, rubber, wood, cement components, ceramics, glass, etc. Sealant is a material used to fill voids (holes, joints, seams, etc.) and has both bonding and sealing functions.
