(1) Consider the variety and performance of curing agents
The type of curing agent significantly impacts the mechanical strength, heat resistance, water resistance, and corrosion resistance of the final product. For example, aromatic polyamines, imidazoles, and acid anhydrides generally offer better thermal stability compared to aliphatic polyamines or low molecular weight polyamides. When it comes to epoxy resins, those cured with aromatic acid anhydrides tend to perform better than those cured with aromatic diamines or aliphatic polyamines. Additionally, triethylene tetramine provides good alkali resistance but lacks in acid and formaldehyde resistance. Alicyclic polyamines, such as isophorone diamine, offer excellent chemical resistance when used in epoxy systems. Anhydride-based curing agents also provide better alkaline resistance than acidic resistance. It's crucial to choose the right curing agent based on the specific application and desired properties.
(2) Combination of several curing agents
Using a combination of different curing agents can lead to improved overall performance through synergistic effects. For instance, blending a low molecular weight polyamide with a small amount of m-phenylenediamine allows for room temperature curing while enhancing the toughness of the final product and improving its heat resistance. Another example is the combination of triamellitic anhydride (TMA) with methyltetrahydrophthalic anhydride, which forms a eutectic mixture with low viscosity (around 200–250 mPa·s at 25°C). This makes it easier to mix with epoxy resins, thereby improving processability and workability during formulation.
(3) Pay attention to the environmental protection of curing agents
The selection of curing agents should prioritize safety for both human health and the environment. Ethylenediamine, for example, should not be used alone due to its potential toxicity. Instead, modified amine curing agents are recommended to reduce harmful emissions and improve overall environmental compatibility. Choosing eco-friendly options not only supports sustainable practices but also meets regulatory requirements in many industries today.
Zonglan Hand Tools for eyelets consist of piercing and attaching hand toolsets.
This manual set is designed to be used with a hide face mallet. It is good for piercing material and attaching curtain eyelets afterward. Not all hand tools are the same and it is not easy to find such a highly qualified hand tool for attaching curtain eyelets in today`s world.
Though these tools are designed for low-volume eyelet application projects, Zonglan Hand Tools are professionally designed and produced with advanced technology for decades of problem-free use. Zonglan Hand Tools are made of Stainless Steel to increase their resistance to oxidation. Their surface is specially treated for metal hardening for stronger durability against harsh hammer usage.
Zonglan Hand Tools are designed in such a manner affording the use of minimum force with maximum comfort. In addition, thanks to its precision, the eyelet application quality of Zonglan Hand Tools is far better than the application quality of its ordinary competitors.
Our hand tools sets are available for 6mm,10mm and 12mm Easy Apply Zonglan eyelets and are suitable to attach them onto various substrates, including tarpaulin, drapery and home textile.
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NINGBO ZONGLAN MECHANICAL AND ELECTRICAL EQUIPMENT MANUFACTURE CO., LTD , https://www.zonglaneyelet.com