- Anti-blocking Agents\/Slipping Agents<\/a><\/li>
- Matting Agents<\/a><\/li>
- Light Diffusion Agents<\/a><\/li>
- Toner Additives<\/a><\/li>
- Resin fillers<\/a><\/li><\/ul><\/div>\n\n\n\n
Anti-blocking Agents\/Slipping Agents<\/h2>\n\n\n\n
\n\nNippon Shokubai\u2019s fine particles are used in a variety of plastic materials as anti-blocking agents and slipping agents of plastic films.<\/p>\n\n\n\n
The EPOSTAR\u2122 MV Series<\/a> is generally used by kneading the particles into plastic materials.
<\/p>\n\n\n\nThe high heat resistance of these particles enable the prevention of coloring caused by heating during kneading.
The particle diameter can also be adjusted in accordance with the thickness of the film, and as there is little scratching of films compared to inorganic silica particles, there is no impairment of the film\u2019s transparency.
It is also possible to modify the fine particles\u2019 surfaces to enhance their affinity with film resins.<\/p>\n<\/div>\n\n\n\n\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/03\/particle_case_1.png\")
<\/figure>\n<\/div>\n<\/div>\n\n\n\n![\"Forming](\"\/en\/wordpress\/wp-content\/uploads\/2022\/11\/particle_caseAB-Agents-1024x226.png\")
<\/figure>\n\n\n\nSimilar to the abovementioned EPOSTAR\u2122 MV Series<\/a>, the SEAHOSTAR\u2122 KE-P Series<\/a> is also used by kneading the particles into plastic materials.
Meanwhile, the ethylene glycol dispersion KE-E Series<\/a> can be used in the processes to manufacture PET resins, making it easier to manufacture PET resins with good dispersibility.
The EPOSTAR\u2122 MX Series<\/a> and SEAHOSTAR\u2122 KE-W Series<\/a> also use their water dispersion features to achieve properties such as slip coatings on film surfaces; these particles can be used in combination with various film properties.<\/p>\n\n\n\nPlease inquire about adjusting the particle diameter and refractive index and improving solvent resistance and heat resistance in accordance with your needs and preferences.<\/p>\n\n\n\n
Examples of Use of Fine Particles in the Film Manufacturing Process<\/h3>\n\n\n\n
![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2024\/09\/particle_case_3-1-1024x371.png\")
MDO : Machine direction orienter, TDO : Transverse direction orienter<\/figcaption><\/figure>\n\n\n\n \nComprehensive Guide to Anti-blocking Agents?<\/a><\/div>\n<\/div>\n\n\n\nMatting Agent<\/strong>s<\/h2>\n\n\n\n
\n\nThe EPOSTAR\u2122 Series<\/a> consists of spherical microparticles based on thermoset resin. By scattering light, these particles produce a matte finish on surfaces, enhancing texture and delivering a refined, premium appearance. They are widely used as matting agents in inks, coatings, films, and other applications.<\/p>\n\n\n\n
Among the EPOSTAR\u2122 Series, microparticles made from benzoguanamine resin have a significantly higher refractive index (n = 1.66) compared to typical organic particles such as acrylic or styrene. This enables precise control over haze and light transmittance, resulting in excellent matting performance and a sophisticated, high-end finish.<\/p>\n<\/div>\n\n\n\n
\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/07\/particle_case_1.5-1.png\")
<\/figure>\n<\/div>\n<\/div>\n\n\n\nThe EPOSTAR\u2122 Series<\/a> also demonstrates excellent resistance to a wide range of solvents, along with outstanding dispersibility and high thermal stability.<\/p>\n\n\n\n
Several product variations are available with different particle sizes and distributions, allowing for flexible use in various matting applications.<\/p>\n\n\n\n
\n\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/07\/epostar_ma_mv-1024x538.jpg\")
<\/figure>\n<\/div>\n\n\n\n\n\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/07\/eposter_matting_.png\")
EPOSTAR\u2122 induces diffuse light scattering<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n Light Diffusion Agents<\/h2>\n\n\n\n
\n\nWith a wide range of refractive indices, from the low refractive index of the SEAHOSTAR\u2122 Series<\/a> (inorganic silica particles (n = 1.43)) to the high refractive index of the EPOSTAR\u2122 Series<\/a> (benzoguanamine-formaldehyde resin particles (n = 1.66)), and a lineup of average particle diameter from submicrons to 10 microns, these products are used in the optical films of liquid crystal panels and as diffusion agents in LED lighting.<\/p>\n<\/div>\n\n\n\n
\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/03\/particle_case_2.png\")
<\/figure>\n<\/div>\n<\/div>\n\n\n\nToner Additives<\/h2>\n\n\n\n
\n\nThe EPOSTAR\u2122 Series<\/a> of products have compounds that contain many nitrogen atoms, such as melamine and benzoguanamine, in the resin skeleton, which gives them a high positive charge as particles.
Particles with a positive charge are generally particles that have been treated with amino-based surface treatment agents. Compared to these particles, EPOSTAR\u2122 particles have a noticeably high positive charge with virtually no variation in the electric charge amount of each particle, enabling them to show stable electrostatic properties and be ideal for use as charge control agents for toners.<\/p>\n<\/div>\n\n\n\n\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/03\/particle_case_3.png\")
<\/figure>\n<\/div>\n<\/div>\n\n\n\nPositive Charge Data of EPOSTAR\u2122<\/h3>\n\n\n\n
![\"Blowoff](\"\/en\/wordpress\/wp-content\/uploads\/2022\/11\/D-8-13_01_e-1024x752.png\")
<\/figure>\n\n\n\nRole of Toner Additives<\/h3>\n\n\n\n
Toners are composed of binder resins, coloring materials, charge adjusting agents, waxes, and external additives.
External additives play an important role in adhering to the surface of the toner and controlling properties such as electrostatic and anti-blocking properties, as well as fluidity.
Nippon Shokubai\u2019s EPOSTAR\u2122 Series<\/a> of products contain many nitrogen atoms that enable the use of positive charges and make them ideal for use as agents for controlling and maintaining electrostatic charge.<\/p>\n\n\n\nResin fillers<\/h2>\n\n\n\n
\n\nSEAHOSTAR\u2122 products are used as fillers of various resins in order to modify resins.
SEAHOSTAR\u2122 products are particularly ideal for use as resin fillers for electronic materials, applying their features of having minimal coarse particles and impurities.<\/p>\n\n\n\nSEAHOSTAR\u2122 KE-S Series<\/a>
SEAHOSTAR\u2122 Surface Treatment Type<\/p>\n<\/div>\n\n\n\n\n![\"\"](\"https:\/\/www.shokubai.co.jp\/en\/wordpress\/wp-content\/uploads\/2025\/03\/particle_case_4.png\")
<\/figure>\n<\/div>\n<\/div>\n\n\n\nSEAHOSTAR\u2122 Properties<\/h3>\n\n\n\n
- \n
- Perfectly spherical with a sharp particle size distribution and minimal coarse particles<\/li>\n\n\n\n
- Manufactured in dedicated equipment and free from contamination of foreign components<\/li>\n\n\n\n
- Able to make the particles surfaces hydrophobic by modifying the surfaces<\/li>\n\n\n\n
- Does not contain radioactive substances<\/li>\n<\/ol>\n\n\n\n\n\n
![\"\"](\"\/en\/wordpress\/wp-content\/uploads\/2022\/11\/\u8868\u9762\u6539\u8cea\u4f8b\uff08\u6587\u5b57\u5165\u308a\uff09-1.png\")
(Example of Surface Modification)
Able to make the particles\u2019 surfaces hydrophobic<\/figcaption><\/figure>\n<\/div>\n\n\n\n\n![\"\"](\"\/en\/wordpress\/wp-content\/uploads\/2022\/08\/img_case_008.png\")
Has a sharp particle size distribution, with minimal coarse substances (single and secondary aggregates)<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n SEAHOSTAR\u2122 Properties for Sealing Resins<\/h3>\n\n\n\n
- \n
- As shown in the above (left) diagram, silica fillers have a broad particle size distribution and contain coarse substances (single particles), which causes clogging and scratching on IC chips.<\/li>\n\n\n\n
- The SEAHOSTAR\u2122 Series<\/a> of products have a sharp particle size distribution, with minimal coarse substances (single particles, secondary particle aggregates), making them ideal for use in sealing resins, irrespective of the mounting method used (CUF, NCP, NCF, etc.).<\/li>\n<\/ul>\n\n\n\n
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- Matting Agents<\/a><\/li>