Talc in Plastics - تالک در پلاستیک ها
- Anti-block in
- LLDPE, LDPE, & PP Films
- Barrier in
- BMC, Polyester Gel Coats
- Reinforcement in
- Nucleation agent in
- Specialty applications for SMI products
- SMI minerals for plastics
- SMI minerals for engineering resins
- SMI minerals for polyolefin films
- SMI minerals for reinforced polyolefins
- SMI minerals used in Automotive Parts
- About Specialty Minerals Inc.
- What is Talc?
Talc is a highly functional additive that enhances key properties of numerous resins. In addition to being a cost-effective filler, talc can effectively provide antiblocking, reinforcement, and improved barrier properties. During polymer processing, talc, as the softest mineral, minimizes equipment wear. It also decreases mold shrinkage, and improves end product machining.
Thermoplastic elastomers, whether they be homopolymer, copolymer or TPO resin systems, benefit from the addition of the appropriately sized, high aspect ratio talc. Talc filled olefins also exhibit ductile fracture while the base resin fractures tend to be brittle.
As an example, talc with an aspect ratio of 10 to 1 when melt compounded with a homopolymer will provide a 250 percent increase in flexural modulus.
In polyethylene film applications, talc is an effective, low abrasion antiblock. Polyester gel coat barrier properties are improved with the addition of fine ground, platy talc. Talc also functions well as a nucleating agent during melt compounding.
Some of the key plastic application areas for talc are:
Specialty Minerals was the developer of talc-based antiblock additives for polyethylene films. ABT® and Polybloc® talcs are best suited for general purpose blown films. When the highest clarity is required, the Optibloc® family of products should be used.
For nucleation, use an ultrafine ground talc such as UltraTalc® 609 talc. This and slightly coarser products act as nucleation centers, increasing the temperature at which the polymer crystallizes and solidifies, thereby reducing cycle time and increasing productivity.
Reference of this text is: http://www.specialtyminerals.com
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ارسال شده در تاریخ سه شنبه 19 شهريور 1392
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