ABS resin is widely used in injection molding, extrusion and vacuum forming for its well-balanced mechanical 
properties, chemical resistance and processing properties. Especially, ABS resin has high gloss and can be vacuum-formed easily in nature that leads to successful application in sheet and vacuum-forming products.
Refrigerator liner and door panel are the typical products of vacuum forming. In case of refrigerator liner, its large, complicated and deep design needs ABS resin more developed in vacuum-forming property as well as high performance vacuum forming machine and forming technology.
ABS, being produced by high quality extrusion machines, has the following features:
Non-toxic
Easy vacuum forming
Uniform extrusion
Good chemical resistance
Well-balanced mechanical properties
Stable color to sunlight
Recycle is possible
NEW PRODUCT:
Transparent ABS sheets are a new product from Noavaran Aida Plastic Co. with the same physical and mechanical properties of ABS sheets, while they are also transparent and can find more different applications:
PRODUCT SPECIFICATIONS:
AIDA-ABS sheets, in the plain form, are being produced in the following dimensions:
Thickness: 1.3-8 mm
Max. Width: 2050 mm
It is possible to produce the sheets according to the client request, subject to our production conditions. For more information, please do not hesitate to contact our sales department at:
sales@n-aidaplastic.com
ABS flat sheets are also being produced in different embossed forms according to the above dimensions.
The sheets could be produced up to 3 layers, according to the following design:
COLORS:
ABS sheets are being offered in the following colors:
- Snow white
- Bluish white
- Grey
- Black
- Blue
- Red
- Yellow
It is also possible to produce any desired color for the client, subject to fulfill our minimum order level. For more information you can contact our sales department at: sales@n-aidaplastic.com
PROPERTIES:
Typical properties of ABS raw materials which is used for the production of refrigerator liner sheets is as follow:
| Test Item | Test Condition | Unit | ASTM | ABS |
| Tensile Strength | ۲۳°C | Kg/cm2 (PSI) |
D638 | ۵۵۰ (۷۸۰۰) |
| Tensile Elongation | – | % | D638 | ۲۵ |
| Flexural Strength | ۲۳°C | Kg/cm2 (PSI) |
D790 | ۷۵۰ (۱۰۵۰۰) |
| Flexural Modulus | ۲۳°C | Kg/cm2 (PSI) |
D790 | ۲۶۰۰۰ (۳۶۹۰۰۰) |
| Izod Impact Strength | ۳٫۲mm, Notched | Kg.cm/cm (ft.lb/in) |
D256 | ۳۰ (۵٫۵) |
| Rockwell Hardness | R Scale | – | D785 | ۱۱۲ |
| Heat Distortion Temp. | ۶٫۴mm, 18.6Kg/cm2, Un annealed | °C (°F) |
D648 | ۹۱ (۱۹۶) |
| Melt Flow Index | ۲۲۰°C, 10Kg ۲۰۰°C, 5Kg |
g/10min | D1238 | ۱۲ ۱٫۲ |
| Molding Shrinkage | – | % | D755 | ۰٫۴ , ۰٫۷ |
| Specific Gravity | – | – | D792 | ۱٫۰۴ |
| Flammability | UL94, HB | Class | UL | HB |
| Water Absorption | – | % | D750 | ۰٫۳ |
Chemical Resistance of ABS sheets:
| AGENT | RESULT | AGENT | RESULT |
| Water | ۵ | Ethyl Alcohol | ۵ |
| Hot Water (80°C) | ۳ | Hydrochloric Acid (5%) | ۴ |
| Liquid Ammonia (10%) | ۵ | Phenol (5%) | ۳ |
| Sodium Hydroxide (10%) | ۵ | Glacial Acetic Acid (38%) | ۳ |
| Gasoline | ۴ | n- Heptane | ۴ |
| Nitric Acid (10%) | ۵ | Ether | ۴ |
| Hydrochloric Acid (10%) | ۵ | Benzene | ۲ |
| Sulfuric Acid (30%) | ۴ | Toluene | ۲ |
| Sodium Hydroxide (10%) | ۵ | Xylene | ۲ |
| Automotive fluids (non reactive organic esters) |
۴ | Xylene | ۲ |
| Detergents | ۴ | Ketone | ۲ |
| Silicon oil | ۵ | Esters | ۴ |
Key:
۵ = no change
۴ = slight change in appearance & physical properties
۳ = considerable change in appearance & physical properties
۲ = severe change in appearance & physical properties and dissolving
Storage Conditions:
Shelf life = 168 hours (1 week), Temperature = 23°C
Characterization of good quality ABS sheet for refrigerator liner:
Appearance: free from bubbles, voids, cracks, impurities and other defects, homogenous color distribution, uniform surface gloss level
Dimension tolerance: less than 50 mm (thickness), 1 mm (length, width) and 2 mm (rectangularity)
Rigidity and toughness: puncture impact strength > 10 J/mm
Homogenous shrinkage after thermal treatment between -3% to -5% in machine direction and less than + 2% in transverse direction
Thermo-formability: uniformity of stretching at a high temperature possesses with a proper modulus. Required formed product in good appearance and quality in thickness.
Chemical resistance: refrigerator grades must have high resistance to such chemicals as raw material of urethane, oil and food and to chemicals including raw materials of polyurethane foam, such as TDI, MDI, polyol, HCFC-141b
Thermo-formability:
Thermo-formability means material distribution and foam sharpness of inner liner. The hot tensile strength and elongations reflect well the thermo-formability.
The minimum liner wall thickness and material distribution are very important factors to the success of thermoforming because material stiffness, opacity and chemical resistance directly depend on the minimum liner wall thickness after thermoforming.
Recommended Thermoforming Conditions for ABS sheets :
Processing temperature : 140 ~ 150 °C
Bubble height : 65% of mold depth (female mold)
۸۵% of mold depth (male mold)
Plug depth : 85% of mold depth (female mold)
Mold temperature : 50 °C
APPLICATIONS:
- Refrigerator inner liners
- (ABS sheets which are used for the refrigerator liners are resistant to R141b, R11 and Cyclopentane blowing agents).
- Automobile interior parts
- Sanitary wares and bathtubs by applying a co-extruded PMMA layer
- Suitcases