On October 1st, 2025, the annual National Day will be held as scheduled, which is a joyful moment for the whole country to celebrate national prosperity and unity. Mid-Autumn Festival is approaching on October 6th, 2025. It is a traditional festival with a long history, and also a good time for family reunion. On this day, people admire the moon, eat mooncakes, express their longing and love to their loved ones, and enjoy the warmth and joy of reunion. This year, two festivals meet, and this moment is even more festive. All of us at Sunman sincerely wish you and your family happiness, safety, and success! Sunman's 2025 National Day and Mid-Autumn Festival holidays: October 1st (Wednesday) to October 8th (Wednesday), 2025 During the holiday period, Sunman will temporarily suspend normal office operations. But If you have any urgent inquiry, please feel free to contact us via email or phone at any time. We will reply to you as soon as possible.

The polyurethane resin used in the ink is generally made of a polyester/polyether polyol and an isocyanate, and has a molecular force of about 20,000 to 40,000. Its solvents are mainly benzene, ketone, ester solvents as the main solvent. In the research and development process, according to the environmental requirements of the ink factory and the printing factory, the corresponding benzene-free ink resin can be prepared by using a keto ester solvent or an alcohol ester solvent. Ink polyurethane resin features： 1. Excellent adhesion fastness to film substrates Polyurethane resin ink segment contains polar groups such as carbamate, allophanate ester, ester bond, ether bond, and polar groups formed on the surface of many polar substrates such as PET, PA, etc. Hydrogen bonds, in turn, form a linker with a certain degree of linking strength. After the polyurethane resin is made into an ink, it is printed on a polar plastic substrate surface with excellent adhesion fastness. 2. Good affinity and wettability with pigments Polyurethane resins for inks are generally prepared from polyester or polyether polyols, alicyclic diisocyanates and diamine/diol chain extenders and have a molecular weight of about tens of thousands. Due to the introduction of the urea bond in the PU resin, a polyurethane-urea resin (PUU) is formed so that it has good dispersion wetting properties to the pigment. 3. Good resin compatibility The polyurethane resin for ink has good compatibility with aldehyde and ketone resin, vinyl resin, etc. The user can add it according to the actual situation and his own craft formula to improve the ink's overall performance. 4. Excellent yellowing resistance In the preparation process, the polyurethane resin for printing ink mainly uses aliphatic polyester and aliphatic isocyanate as the main raw materials for synthesis. Compared with aromatic polyurethane, it has excellent optical stability, and the film has excellent yellowing resistance after film formation. 5. Excellent film formation Ink polyurethane resins are structurally different from polyurethane resins used in other fields. Traditional polyurethanes mainly react with polyester polyols/polyether polyols with isocyanic acid to produce hydroxyl terminated polyurethane resins. The polar groups in the molecular structure are carbamates. Mainly ester, molecular cohesion is insufficient to meet the filming performance requirements of ink resin. Therefore, the use of polyurethane resins for inks to introduce urea groups on the basis of conventional polyurethanes greatly improves the cohesive strength and film-forming properties of the resins themselves. 6. Wide compatibility of organic solvents and good solvent release Solubility of the organic solvent to the resin is achieved by the polarity of the solvent molecule attracting solute molecules, which is commonly known as the same type of miscibility; traditional polyurethane resin has extensive compatibility with organic solvents, ketones, es...

Resin berwarna kuning pucat dan tidak berbau ini dibuat dengan menambahkan hingga 65% klorin ke dalam elastomer, seperti karet alam, karet butil, atau stirena-butadiena. Karet terklorinasi menghasilkan lapisan film yang keras, kuat, dan mengkilap. Karet ini terutama digunakan untuk cat, pernis, perekat, tinta, dan pelapis kertas. Karet terklorinasi juga digunakan untuk cat tahan air pada lantai dan kolam renang. Karet ini sangat tahan terhadap bahan kimia dan kelembapan. Karet Terklorinasi dalam Cat: Cat karet terklorinasi biasanya terdiri dari resin karet terklorinasi, resin yang dimodifikasi, pigmen/pengisi, aditif, dan pelarut. Tidak dibatasi oleh suhu selama konstruksi: Pelapis karet terklorinasi dapat diaplikasikan pada lingkungan berkisar antara -20 hingga 50°C, tanpa dibatasi oleh musim atau suhu. Nyaman digunakan: Sebagian besar pelapis karet terklorinasi dikemas dalam sistem kemasan kaleng tunggal, dan tidak memerlukan pencampuran sementara komponen lain di lokasi konstruksi. Setelah drum kemasan dibuka dan dicampur secara merata, pelapis dapat digunakan. Cepat kering: Pelapis karet terklorinasi adalah pelapis yang mengering secara fisik melalui penguapan pelarut. Laju pelepasan pelarutnya cepat, dan setelah pengecatan, lapisan tersebut cepat kering menjadi lapisan film. Setelah 4 hingga 6 jam pada suhu ruangan, lapisan kedua dapat diaplikasikan. Lapisan tebal dapat diperoleh: Lapisan pasta tebal karet terklorinasi, jika disemprot dengan penyemprotan tanpa udara bertekanan tinggi, dapat mencapai ketebalan lapisan kering sekitar 55-85μm untuk setiap lintasan. Ketebalan lapisan kering tertinggi dapat mencapai 120μm, sehingga dengan beberapa lapisan yang lebih sedikit, lapisan tebal dapat diperoleh dan masa konstruksi dapat dipersingkat. Daya rekat yang baik: Pelapis karet terklorinasi memiliki daya rekat yang baik pada permukaan baja dan logam. Di saat yang sama, pelarut dalam bahan pembentuk film dapat meresap di antara lapisan-lapisan tersebut, membuatnya saling menempel, sehingga meningkatkan daya rekat antar lapisan pelapis. Sifat anti korosi yang baik: Karena karet terklorinasi sendiri merupakan bahan pembentuk film yang inert secara kimia, permeabilitas film pelapis terhadap uap air dan oksigen sangat rendah, hanya 1/10 dari permeabilitas alkohol dan asam. Selain itu, film ini memiliki ketahanan yang baik terhadap air, garam, asam, alkali, oksidan, dan berbagai gas korosif. Nyaman untuk pemeliharaan: Selama perawatan, lapisan cat lama yang telah melekat kuat tidak perlu dilepas. Lapisan cat baru dan lama dapat larut bersama karena penetrasi pelarut, sehingga menghasilkan daya rekat yang kuat. Cat karet terklorinasi juga dapat diaplikasikan pada beberapa jenis lapisan cat lainnya, sehingga perawatannya sangat mudah. Memiliki sifat anti-toksisitas dan tahan api yang baik: Karena kandungan polimer "klorin" yang tinggi dalam komponen pelapis karet terklorinasi, lapisan ini memiliki sifat menghambat pertumbuhan bakteri beracun. Jika permu...