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When UV ink comes off during a tape test, the primer is often blamed first. However, poor adhesion can also result from the film surface, contamination, incomplete primer drying or incorrect UV curing. Here, “adhesion promoter” refers to a primer applied before printing. No single grade is suitable for every plastic film. Choose the Primer by Substrate PET and BOPET films often benefit from a prim...
Choosing a water-based resin should begin with the application, not with viscosity, solids content, or price. Products with similar technical data can behave very differently in production. A resin may work well on paper but show weak adhesion on plastic film. A coating may form properly under heated drying but remain tacky at room temperature. A low-viscosity polyurethane dispersion may look too ...
As global environmental regulations such as EU REACH and OEKO-TEX® Standard 100 become increasingly stringent, traditional solvent-based PU systems face growing restrictions in protective glove manufacturing. With advantages such as low VOC emissions and no DMFa residue, waterborne polyurethane (WPU) emulsions are rapidly becoming a key choice for glove manufacturers transitioning from solvent...
Printing problems on plastic film do not always come from the same part of the process. Ink may shrink immediately after transfer. A printed layer may look normal but fail a tape test after drying. Some problems only appear after water exposure, rubbing or when the press reaches normal production speed. During troubleshooting, it is useful to record when the defect first appears before changing se...
Poor surface smoothness, low gloss, and microscopic pinholes may occur during the spraying and baking of waterborne PTFE non-stick coatings. These defects can allow steam, fats, and corrosive substances to penetrate the coating over time, increasing the risk of blistering, peeling, and reduced non-stick performance. Why Pinholes May Form Pure PTFE has extremely high melt viscosity and limited flow...
Varnish is one of the “unsung heroes” of the printing process. Many people think it is only used to make paper look glossier, but it actually serves many other purposes. Simply put, applying varnish to a printed product is like giving it a functional outer layer. It protects the printed image while helping the product withstand friction, moisture, stains, and further processing. First, the Most Pr...
The Mid-Autumn Festival is a time for family, reunion, and sharing good wishes. At Sinograce Chemical, it is also a chance to thank the people behind our work. Our team develops and supplies water-based acrylic emulsions, polyurethane dispersions, adhesives, and functional coatings for a range of applications. Every product recommendation, sample, and customer project depends on the care of our co...
Waterborne Polyurethane (PUD) × NBR Latex: Verified Compatibility for Water-Based Polymer Blending How can polyurethane and nitrile rubber latex work together to develop high-performance water-based formulations? Waterborne polyurethane dispersion (PUD/WPU) and nitrile butadiene rubber (NBR) latex each offer valuable properties for industrial applications. Combining them can create new opportuniti...
The wall feels dry, but after a light shower, visible streaks appear. Some areas may also look glossier than the surrounding surface. Does this mean the acrylic emulsion has poor water resistance, or could the additive package be contributing to the problem For exterior paint formulators, the starting point is to examine the formulation and drying conditions together. Why a Dry Surface May Still B...
Are you visiting Guangzhou during the Canton Fair? Sinograce Chemical will be in the city fromOctober 22 to 24, 2026, and we would welcome the opportunity to meet and talk about your resin and coating needs. From materials for printing and textiles to surface finishing and non-stick applications, let us use the meeting to explore products relevant to your business. Water-Based Acrylic and Polyuret...
A fried egg slides easily off a non-stick pan, yet the coating underneath remains attached to the metal through repeated heating and cooking. This raises an interesting question: if PTFE is known for its exceptionally low adhesion, how can it form part of a durable coating on cookware? The explanation lies in the difference between the surface that contacts food and the interface that bonds with t...
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Sinograce Chemical is professional technical enterprise providing solutions of surface materials and manufacturing of raw materials. Sinograce Chemical Company is composed of R&D center, Manufacture center, Quality control department, Market center and International trade department. We have been dedicating to research on excellent paint/coating, adhesive for over 15 years. And now still conti...
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