Celcon® GB25

This supplier and product may also be known by these terms: Celcom

Product names can be difficult to match. You may have searched any one of these terms to find this product: Celcon® GB25, Celcon GB25, Celcon® , Celcon, CelconGB25, GB 25, GB25, Acetal Copolymer, Acetal Copolymer, Acetal (POM) Copolymer, Acetal POM Copolymer, Acetal, pom, Ticona, AcetalPOMCopolymer, 25GB

Features may also be described by the following terms: Low Shrinkage, Warp Resistant, Warpage Resistant.

Uses may also be described by the following terms: Thin-walled Parts, Thin Walled Parts, Thin-wall Parts, Thin wall Parts, Thinwall Parts.

This plastic material has approval for 7 automotive specifications from the following agencies (the number in parentheses shows the number of specifications for that agency): FORD (3), GM (3), DELCO (1).

Standard reciprocating screw injection molding machines with a high compression screw (minimum 3:1 and preferably 4:1) and low back pressure (0.35 Mpa/50 PSI) are favored. Using a low compression screw (I.E. general purpose 2:1 compression ratio) can result in unmelted particles and poor melt homogeneity. Using a high back pressure to make up for a low compression ratio may lead to excessive shear heating and deterioration of the material.

Melt Temperature: Preferred range 182-199 C (360-390 F). Melt temperature should never exceed 230 C (450 F).

Mold Surface Temperature: Preferred range 82-93 C (180-200 F) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120 C (250 F) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65 C/150 F) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25 C (80 F). In general, mold surface temperatures lower than 82 C (180 F) may hinder weld line formation and produce a hazy surface or a surface with flow lines, pits and other included defects that can hinder part performance.