Engineering plastics â The Manual - F.wood-supply.dk

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Thermal properties Characteristic temperatures Service temperatures Glass transition temperature The glass transition temperature T g is the temperature at which polymers change from a hard elastic and brittle state to a flexible rubbery elastic state. A distinction must be made here between amorphous and partially crystalline thermoplastics. • Modulus • Temperature amorphous T g T g T m • Modulus • Temperature semi-crystalline An amorphous material can be subjected to mechanical wear above the T g , as here its mechanical strength decreases sharply. Partially crystalline materials, in contrast, still demonstrate a certain mechanical strength beyond the T g due to their crystalline areas, and are therefore particularly well suited for components exposed to mechanical stress. Melting temperature The melting temperature T m is the temperature at which a material melts, i.e. changes from the solid to the fluid aggregate state and its crystalline structures break down. Long-term service temperature The long-term service temperature is defined as the maximum temperature at which a plastic has lost no more than 50 % of its initial properties after 20,000 hours of storage in hot air (in accordance with IEC 216). Short-term service temperature The short-term service temperature is the short-term peak temperature which the plastic can tolerate over a short period (from minutes to occasionally hours) taking into consideration the stress level and duration, without sustaining damage. The maximum service temperature is dependent upon the following factors: ˌˌDuration of exposure to temperature ˌˌMaximum admissible deformation ˌˌDegradation of strength characteristics due to thermal oxidation ˌˌAmbient conditions Negative service temperatures The service temperature in the negative temperature range is not precisely defined and depends largely on different characteristics and ambient conditions: ˌˌToughness / brittleness of a material ˌˌModification: materials with reinforcement fibres tend to demonstrate hard-brittle behaviour ˌˌTemperature ˌˌDuration of load ˌˌType of load (e.g. impact or vibration load) 46
Service temperatures [°C] Glass transition temperature [°C] Melting temperature [°C] –300- –200- –100- 0 100 200 300 400 °C –100- 0 100 200 300 400 °C TECARAN ABS TECANYL 731 TECAFINE PE TECAFINE PE 10 TECAFINE PP TECAPRO MT TECAFORM AD TECAFORM AH TECAMID 6 TECAMID 66 TECAMID 46 TECAST T TECARIM 1500 TECAPET TECANAT TECAFLON PVDF TECAFLON PTFE TECASON S TECASON P MT farbig TECAPEI TECATRON TECAPEEK TECATOR 5013 TECASINT TECARAN ABS TECANYL 731 TECAFINE PE TECAFINE PE 10 TECAFINE PP TECAPRO MT TECAFORM AD TECAFORM AH TECAMID 6 TECAMID 66 TECAMID 46 TECAST T TECARIM 1500 TECAPET TECANAT TECAFLON PVDF TECAFLON PTFE TECASON S TECASON P MT farbig TECAPEI TECATRON TECAPEEK TECATOR 5013 TECASINT –300- –200- –100- 0 100 200 300 400 °C –100- 0 100 200 300 400 °C Negative application temperature long-term short-term • • Service temperature long-term short-term Glass transition temperature Melting temperature 47
Page 1 and 2: Stock shapes Engineering plastics -
Page 3 and 4: 4 6 7 8 Overview of plastics Classi
Page 5 and 6: TECANAT (PC) TECAPEI (PEI) TECATRON
Page 7 and 8: Ensinger process chain The name Ens
Page 9: Compression moulding / sintering Co
Page 12 and 13: 40 30 20 H H H H H H H H C C C C C
Page 14 and 15: PC H H C C n H H CH 3 O C O C CH 3
Page 16 and 17: H C H O n 40 H C H H C n POM-H 30 P
Page 18 and 19: H C O H POM-C H C O H H C O n H H H
Page 20 and 21: H H H N CH 2 x C O n Unreinforced C
Page 22 and 23: ABS PC 120 100 80 H N CH 2 x C O n
Page 24 and 25: PES O S O O O H H H H C C O C C C C
Page 26 and 27: 100 80 60 40 PC Structural formula
Page 28 and 29: F C F F C F n 80 PTFE F F C C F F n
Page 30 and 31: O O C O n O 160 C O C H H O C C O H
Page 32 and 33: O O S n CH O 3 O O O C C O C C O n
Page 34 and 35: CH 3 N m O CH 3 n 100 F C F F C F n
Page 36 and 37: PEI PI O O C O n 160 O C O C H H O
Page 38 and 39: H N CH 2 x H N C O CH 2 C y O n 160
Page 40 and 41: O C O C H H O C C O H H n DMA 3-poi
Page 43 and 44: In order to determine correct mater
Page 45: Fillers Fillers generally offer no
Page 49 and 50: Coefficient of linear thermal expan
Page 51 and 52: Influence of time on mechanical cha
Page 53 and 54: Compressive strength [MPa] Ball imp
Page 55 and 56: Tribological characteristics Genera
Page 57 and 58: Electrical properties Surface resis
Page 59 and 60: Comparative tracking index [V] Cond
Page 61 and 62: Potassium permanganate, aqueous sol
Page 63 and 64: Flame retardant classification With
Page 65 and 66: Weather resistance Radiation resist
Page 67: Medical technology approvals The bi
Page 70 and 71: Material chosen Criteria for materi
Page 72 and 73: Calculations In order to clarify th
Page 75 and 76: Machining is the predominant method
Page 77 and 78: α t Machining Guidelines γ Sawing
Page 79 and 80: Intermediate annealing An intermedi
Page 81 and 82: Welding processes Method Heating el
Page 83 and 84: Bonding PEEK Compressive strength i
Page 85 and 86: Situation in the food and medical t
Page 87 and 88: 4. Semi-finished products made of p
Page 89 and 90: Material TECAFORM AH SD TECAFORM AH
Page 91 and 92: Material TECAMID 66 MH TECAMID 66 G
Page 93 and 94: Material TECATRON TECATRON GF40 TEC
Page 95 and 96: Material TECAPEEK CF30 MT TECAPEEK
Page 97 and 98:
Material TECASINT 2031 TECASINT 239
Page 99 and 100:
Ensinger: Facts and figures Headqua
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Engineering plastics â The Manual - F.wood-supply.dk