Suppliers of acetal
say the inherent non-stick property of the resin no longer prevents good adhesion when overmolding with SEBS thermoplastic elastomers.
Examples are a cyclic acetal
named Vulkazon AFS and an enol ether named Vulkazon AFD.
Protonation of the hemi-acetal
hydroxyl, followed by the loss of water, produces an oxonium ion which quickly attacks the adjacent hydroxyl on PVOH to yield the cyclic acetal
This report was created for strategic planners, international marketing executives and import/export managers who are concerned with the market for acetals
, hemiacetals, and their halogenated, sulfonated, nitrated, or nitrosated derivatives in the United States.
A properly packed out acetal
part produced at the correct mold temperature will exhibit continued shrinkage of about 0.
The traditional route of using halogenated FR systems is not an option with acetals
because of the violent reaction that these polymers undergo with any chlorinated or brominated substances.
copolymers include general-purpose, impact-modified, and antimicrobial grades.
For parts that must withstand higher temperatures or more aggressive chemicals than standard nylons and acetals
can, DuPont offers two new Zytel HTN highperformance PPA-based polyamide resins.
Other new Delrin acetal
resins make possible the injection molding of flat shapes and large parts without the warp problems associated with standard acetals
Dry color, color concentrates and compounds for PE, PS, PP, ABS, SAN, PC, nylons, NAS, K-Resin, acrylics, urethanes, butyrate and acetals
Said to be the first acetal
developed specifically for commercial meltblown nonwoven fabrics, Celcon acetal
copolymer grade FG40U01 is designed to exceed conventional acetals
in the ability to provide greater stability in extrusion on both older and the most up-to-date equipment, especially equipment for processing polypropylene (PP).
Its stiffness, strength, and toughness are similar to standard medium-viscosity acetals