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Tospearl 145FL

4.5 micron microfine silicone resin for use as an antiblocking agent in plastic films.




Product Overview

Tospearl 145FL is a 4.5 micron size micro-fine silicone resin that is used as an additive in biaxially oriented polypropylene (BOPP) films as a slip and antiblocking agent. As a slip agent it improves the Coefficient of Friction (COF) to facilitate easier processing, faster line speeds and prevents the film from tearing. 
Tospearl when used as a antiblocking agent prevents adhesion during film production both on a finished roll or on the inside of the bubble. 

Product Specifications

Appearance: White spherical beads
Mean particle diameter (µm): 4.0-5.0
Weight loss @ 250°C and 0.5 hours, %: <1.0
pH²: 6.0-8.0
Bulk specific gravity: 0.43
Particle specific gravity: 1.32
Refractive index: 1.42
Primary Chemistry: Methyl Silsesquioxane beads

Features & Benefits

Uniform particle size
High heat resistance
Low surface energy
Low refractive index
Non migratory


Antiblock masterbatch
Food packaging
Industrial clear films
BOPP Films

Related Products

Tospearl™ Micro-Fine Silicone Resins

Tospearl™ micro-fine silicone resins are spherical polymer powders designed with a very narrow particle distribution and are ideal for film and optical applications. In film applications, they act as a slip-additive or anti-blocking agent.

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