FAQ
1. What is the delivery time?
Typically 2–4 weeks, depending on the order quantity.
2. How can I check the quality?
You can request free samples or place a small trial order to test the product before placing a large order.
3. What standards do your products meet?
All our products comply with international standards such as ISO, DIN, JIS, and GB. We can provide relevant certificates upon request.
4. What quality level does your factory offer?
Our products are known for high quality and competitive pricing. We also offer free samples for your reference.
5. Where are your main markets?
We mainly export to South America, North America, Africa, Asia, the Middle East, India, and other regions around the world.
Why Choose Us
With over 10 years of experience in the fastener industry, we are a trusted Chinese supplier specializing in both standard and non-standard fasteners. We strictly adhere to global standards like DIN, JIS, GB, ANSI, and BS. Our clients include companies from Korea, Iran, Europe, India, and the United States, all of whom have given us positive feedback. We appreciate your interest in our company and hope our website provides you with useful and detailed information. If you need more details, feel free to contact our sales team.
Please feel free to reach out if you're interested in our products! We look forward to working with you.
Hydroxyethylmethacrylate or HEMA is the organic compound with the formula H2C=C(CH3)CO2CH2CH2OH. It is a colorless viscous liquid that readily polymerizes. HEMA is a monomer that is used to make various polymers.
Polyhydroxyethylmethacrylate is hydrophobic; however, when the polymer is subjected to water it will swell due to the molecule's hydrophilic pendant group. Depending on the physical and chemical structure of the polymer, it is capable of absorbing from 10 to 600% water relative to the dry weight. Because of this property, it was one of the first materials to be successfully used in the manufacture of soft contact lenses.
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Liaoning Kelong Fine Chemical Co.Ltd. , https://www.kelongchemy.com