CELCON® M25 CC34031 GRAY

CELCON® M25 CD3068 BLACK

CELCON® M25 CD7068 BLACK

CELCON® M25 CE33391 HOT PINK

CELCON® M25 CE7430 PURPLE

CELCON® M25 CF2001 NATURAL

CELCON® M25 CF2888 NATURAL

CELCON® M25 CG33836 BLUE

CELCON® M25 CG34095 BLUE

CELCON® M25 CG34096 BLUE

CELCON® M25 CG34542 BLUE

CELCON® M25 CG3671 BLUE

CELCON® M25 CH33619 TURQUOISE

CELCON® M25 CJ33269 GREEN

CELCON® M25 CJ33826 GREEN

CELCON® M25 CJ34045 GREEN

CELCON® M25 CL33247 YELLOW

CELCON® M25 CL33402 YELLOW

CELCON® M25 CL33402E YELLOW

CELCON® M25 CL33520 YELLOW

CELCON® M25 CN33827 RUST

CELCON® M25 CN7540 ORANGE

CELCON® M25 CN7540E ORANGE

CELCON® M25 CR33345 PINK

CELCON® M25 CS33273 RED

CELCON® M25 CV33822 TAN

CELCON® M25 CY33828 BROWN

CELCON® M25 H CF2001 NATURAL

 

CELCON M25 | POM | Unfilled

 

Description

Celcon® acetal copolymer grade M25 is a high molecular weight, higher toughness and impact resistance grade primarily used for extrusion and selected injection molding applications.

 

Chemical abbreviation according to ISO 1043-1: POM

 

Please also see Hostaform® C 2521.

 

Other Processing

Injection Molding

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℃ (360-390℉). Melt temperature should never exceed 230℃ (450℉).

 

Mold Surface Temperature: Preferred range 82-93℃ (180-200℉) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120℃ (250℉) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65℃/150℉) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25℃ (80℉). In general, mold surface temperatures lower than 82℃ (180℉) 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.

 

Film Extrusion

Standard extruders with a length to diameter ratio of at least 20:1 are recommended. The screw should be a high compression ratio of at least 3:1 and preferably 4:1 to assure good melting and melt homogeneity. The design should be approximately 35% each for feed and metering sections with the remaining 30% as the transition zone.

 

Melt temperature:160-220℃ (320-430℉)

 

Other Extrusion

Standard extruders with a length to diameter ratio of at least 20:1 are recommended. The screw should be a high compression ratio of at least 3:1 and preferably 4:1 to assure good melting and uniform melt homogeneity. The design should be approximately 35% each for the feed and metering sections with the remaining 30% as transition zone.

 

Melt temperature:180-220℃ (355-430℉)

 

Profile Extrusion

Standard extruders with a length to diameter ratio of at least 20:1 are recommended. The screw should be a high compression ratio of at least 3:1 and preferably 4:1 to assure good melting and melt homogeneity. The design should be approximately 35% each for feed and metering sections with the remaining 30% as the transition zone.

 

Melt temperature:180-220℃ (360-430℉).

 

Sheet Extrusion

Standard extruders with a length to diameter ratio of at least 20:1 are recommended. The screw should be a high compression ratio (at least 3:1 and preferably 4:1) to assure good melting and uniform melt homogeneity. The screw design should be approximately 35% each for the feed and metering sections with the remaining 30% as the transition zone.

 

Melt temperature:180-190℃ (355-375℉).

 

Blow Molding

Consult product information services.

Calandering

Consult product information services.

Compression Molding

Consult product information services.

 

ISO Data	Mechanical properties	Value	Unit	Test Standard
Phys	Density	1410	kg/m³	ISO 1183
	Melt volume rate (MVR)	2.2	cm³/10min	ISO 1133
	MVR test temperature	190	℃	ISO 1133
	MVR test load	2.16	kg	ISO 1133
	Mold shrinkage - parallel	2.2	%	ISO 294-4
	Mold shrinkage - normal	1.8	%	ISO 294-4
	Water absorption (23℃-sat)	0.75	%	ISO 62
	Humidity absorption (23℃/50%RH)	0.2	%	ISO 62
Mech	Mechanical properties	Value	Unit	Test Standard
	Tensile modulus (1mm/min)	2460	MPa	ISO 527-2/1A
	Tensile stress at yield (50mm/min)	63	MPa	ISO 527-2/1A
	Tensile strain at yield (50mm/min)	12	%	ISO 527-2/1A
	Tensile creep modulus (1h)	2100	MPa	ISO 899-1
	Tensile creep modulus (1000h)	1100	MPa	ISO 899-1
	Flexural modulus (23℃)	2430	MPa	ISO 178
	Charpy impact strength @ 23℃	250.0P	kJ/m²	ISO 179/1eU
	Charpy impact strength @ -30℃	190	kJ/m²	ISO 179/1eU
	Charpy notched impact strength @ 23℃	9.1	kJ/m²	ISO 179/1eA
	Notched impact strength (Izod) @ 23℃	8.3	kJ/m²	ISO 180/1A
Therm	Thermal properties	Value	Unit	Test Standard
	Melting temperature (10℃/min)	166	℃	ISO 11357-1,-2,-3
	DTUL @ 1.8 MPa	94	℃	ISO 75-1/-2
	Coeff.of linear therm. expansion (parallel)	1.2	E-4/℃	ISO 11359-2
	Coeff.of linear therm. expansion (normal)	1.2	E-4/℃	ISO 11359-2
SpecProd	Test specimen production	Value	Unit	Test Standard
	Processing conditions acc. ISO	9988-2	-	Internal
Rheo	Rheological Calculation properties	Value	Unit	Test Standard
	Density of melt	1200	kg/m³	Internal
	Thermal conductivity of melt	0.155	W/(m K)	Internal
	Specific heat capacity of melt	2210	J/(kg K)	Internal
	Ejection temperature	165	℃	Internal

 

Processing

Pre Drying

Drying is not normally required. If material has come in contact with moisture through improper storage or handling or through regrind use, drying may be necessary to prevent splay and odor problems.

 

Drying time (h):3

Drying temperature (℃):80 - 100