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Ideal for indoor and outdoor graphic applications. Tougher than corrugated fiberboard, lighter than solid extruded plastic, waterproof, weather resistant and stain resistant, Coroplast is the material of choice for the screen printing industry.
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Color | Black, Brown, Green, Ivory, Navy Blue, Orange, Process Blue, Red, Silver Grey, White, Yellow |
| Size | 18" x 24" x 5/32", 24" x 18" x 5/32", 24" x 36" x 5/32", 36" x 24" x 5/32", 48" x 96" x 1/16", 48" x 96" x 3/32", 48" x 96" x 5/32", 48" x 96" x 1/4", 48" x 96" x 3/8", 48" x 144" x 5/32" |
| 2-4 Mil Material | 5-7 Mil Material | 8 & 10 Mil Material |
|---|---|---|
| 4 pt. .937 Kleen Kut 13T | 4 pt. .990 Kleen Kut 13T | 5/8" Wood |
| 4 pt. 910 Scope Across | 4 pt. 910 Scope Across | 3 pt. 1.250 Shallow Profile |
| 4 pt. .890 Score Around | 4 pt. .850 Score Around | 4 pt. 1.250 Hard Edge or |
| 6 pt. 1.250 Kleen Kut | ||
| Must have Balance Scores | 1/2 Gray Rubber Blocks | |
The name Coroplast® applies to a wide range of extruded corrugated plastic sheet products based on polypropylene copolymers. The natural polymer is chemically inert and is generally considered non-toxic and safe for use in contact with food. The base resin meets FDA requirements as listed in Food Additive Regulation Title 21, Section 177.1520(c), Item 1.1, covering food contact uses.
Pigmented or otherwise modified sheets are not considered to constitute any extra health hazard under normal handling and conversion. All additives are melt-blended into the polymer and encapsulated. Colors are available which will meet food contact approvals.
Coroplast® is made from a combustible thermoplastic material, polypropylene. While discretion would suggest that observation of precautions consistent with regulatory codes and standards should be followed when working with Coroplast, it is equally important to note that compared to other plastics on the market Coroplast is very low on a relative hazard scale.
Two areas of flammability hazard must be addressed: rate of combustion and toxicity of combustion products.
There are many flammability tests in use for different applications in the various parts of North America. A test valid in one area is not acceptable in another. We will try to offer information which will allow the relative hazard of Coroplast to be evaluated. If a flame retardant sheet is needed, ask about our Firewall FRB Brand Product.
In the United States the most generally accepted Surface Flame Spread Test is the ASTM E-84 Tunnel test. This test involves suspending a test specimen in the ceiling of the tunnel and igniting one end in the presence of a forced air stream.
This test is not applicable to thermoplastic material because they will melt out and fall to the floor, prejudicing the result. By this test Coroplast received an unrealistic low 25 (Red Oak is 100).
In Canada, this test has been modified to take thermoplastics into account and samples are tested in the same tunnel but on the floor (ULC-S102.2-78). By this test the 4mm natural sheet exhibited a more realistic Surface Flame Spread of 178 with Smoke Developed of 200 and Fuel Contributed of 100.
One of the factors not visible in the test figure is the length of time to get the fire going.
Until the sheet reaches a temperature of approximately 600 degrees F, it will not release flammable - low molecular weight hydrocarbons.
Should a fire occur, any available fire extinguisher may be used. In a limited fire situation dry chemical powder extinguishers have proven very successful. In a larger scale fire, water sprays/ sprinkler systems are very successful because they quickly cool and damp down the fire.
In a fire situation the amount of smoke and the toxicity of the smoke is perhaps more serious than the burn rate. Smoke evolution is dependent on the available oxygen present, but polypropylene copolymer normally generates little smoke. This is not true for many other thermoplastics. The compounds of combustion of polyolefin plastics are not highly toxic except for carbon monoxide which will be formed when any organic matter - e.g. paper, wood or gasoline burns. In fact, the carbon monoxide given off by burning Coroplast® is less than for cardboard or hardboard.
% Carbon Monoxide (CO) W/W evolved from Coroplast, cardboard and hardboard.
| Temp. Celsius | % Oxygen v/v | Percentage of Carbon Monoxide & CO W/W Evolved from | ||
|---|---|---|---|---|
| Coroplast | Cardboard | Hardboard | ||
| 500 | 21 12 |
6.2 6.6 |
7.6 7.0 |
15.8 9.0 |
| 350 | 21 15 12 |
4.8 11.7 4.3 |
9.4 13.8 11.8 |
9.7 15.5 13.6 |
| 250 | 21 15 |
4.7 2.5 |
11.1 9.3 |
8.0 7.4 |
While Coroplast will burn, it does not have a flash point or an uncontrollable flame spread rate like some acrylics or styrene. It responds very much like paper. Should a fire start it is easily extinguished by any type of extinguisher. Burning Coroplast generates combustion products with very low toxicity. This is common to polyolefin polymers.
For additional Technical information contact Coroplast.
Note: The full size of the sheet ordered should always come out after squaring.
Printing: Cold sheets may cause condensation if not allowed to warm up. This will cause adhesion problems.
Die Cutting: Cutting and creasing becomes easier as the temperature increases. At very low temperatures cutting and creasing properties are severely impaired.
Printing suggestions and ink supplier information are available in Technical Bulletin CSS-006-786.
We recommend that you discuss this type of ink with your supplier to locate a product compatible with your equipment.
Flat bed die cutters have been very successful with Coroplast. Rotary dies may require experimentation with rule types and high durometer blankets. Unlike paperboard, twin-wall plastic sheets must be cut through. Sharp beveled rule requires less pressure for the same cut. A good make-ready that will allow even cutting at minimum pressure will extend die life noticeably. The primary cause of a dull rule on Coroplast dies is the application of excess pressure to a whole die to make a problem spot cut better. Coroplast is more resilient that paperboard and generally requires a wider than usual creasing rule for across flute creasing. The height differential between cutting and creasing rule should also be less than normally used for cardboard especially across the flutes. To "set" a crease, the two skins must crush to touch each other and then have additional pressure applied.
Many successful converters have suggested the following "rule" choices:
These discussions are intended as initial guidelines for the conversion of Coroplast Individual machinery could require conditions or settings that vary from these suggestions. We recommend that customers should carry out their own trials to ascertain the best machine conditions and printing inks for their particular requirements.
| 2 mm | Color | Specification | Tolerance |
|---|---|---|---|
| Gauge | all | 2 mm | ± 0.15 mm |
| Density (grams/sq. meter) | all | 450 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 92 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 3 mm | Color | Specification | Tolerance |
| Gauge | all | 3 mm | ± 0.15mm |
| Density (grams/sq. meter) | all | 600 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 116 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 4 mm | Color | Specification | Tolerance |
| Gauge | all | 4 mm | ± 0.15 mm |
| Density (grams/sq. meter) | nat. & wht. | 750 | ± 5% |
| Density (lbs/1000 sq. ft.) | nat. & wht. | 150 | ± 5% |
| Density (grams/sq. meter) | colors | 700 | ± 5% |
| Density (lbs/1000 sq. ft.) | colors | 143 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 5 mm | Color | Specification | Tolerance |
| Gauge | all | 5 mm | ± 0.15 mm |
| Density (grams/sq. meter) | all | 1000 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 204 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 6 mm | Color | Specification | Tolerance |
| Gauge | all | 6 mm | ± 0.15 mm |
| Density (grams/sq. meter) | all | 1400 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 286 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 7 mm | Color | Specification | Tolerance |
| Gauge | all | 7 mm | ± 0.15 mm |
| Density (grams/sq. meter) | all | 1700 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 347 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 8 mm | Color | Specification | Tolerance |
| Gauge | all | 8 mm | ± 0.15 mm |
| Density (grams/sq. meter) | all | 1800 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 367 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| 10 mm | Color | Specification | Tolerance |
| Gauge | all | 10 mm | ± 0.15 mm |
| Density (grams/sq. meter) | all | 2000 | ± 5% |
| Density (lbs/1000 sq. ft.) | all | 408 | ± 5% |
| Surface Tension (Dyne Level) | all | 46 dyne/cm (minimum) | 46 dyne/cm (minimum) |
| Width | Material Size | Tolerance |
|---|---|---|
| Extruder (Offline) | 2 mm - 6 mm | ±1/8" |
| 8 mm - 10 mm | -1/8", +1/4" | |
| Slitter (Cut Square) | 2 mm - 6 mm | ±1/8" |
| 8 mm - 10 mm | -1/8", +1/4" | |
| Die Cutter | 2 mm - 6 mm | ±1/8" |
| 8 mm - 10 mm | -1/8", +1/4" | |
| Length | Material Size | Tolerance |
| Extruder (Offline) | < 36" | -0", +3/4" |
| 36" - 66" | -0", +1-1/8" | |
| 66" - 96" | -0", +1-1/2" | |
| > 96" | -0", +2" | |
| Slitter (Cut Square) | All | -0", +1/8" |
| Die Cutter | < 36" | ±1/8" |
| 36" - 66" | ±3/16" | |
| 66" - 100 " | ±1/4" | |
| >100" | ±3/8" | |
| Squareness* | Material Size | Tolerance |
| * The difference in length between the corner to corner diagonal measurement | ||
| Extruder (Offline) | < 60" | 3/8" |
| > 60" | 5/8" | |
| Slitter (Cut Square) | < 60" | 1/8" |
| 60" - 72" | 1/4" | |
| > 72" | 5/16" | |
| Die Cutter | < 72" | 1/4" |
| >72" | 5/16" | |
| Warp/Bow* | Material Size | Tolerance |
|
* Maximum height above a flat surface of any portion of a sheet
|
||
| < 96" | 1/4" | |
| > 96" | 1.0" | |
| 70" x 70" or Larger | 2.0" | |
| Straightness* | Material Size | Tolerance |
|
* Maximum distance measured between the edge of a sheet of Coroplast® and a straight edge when the two corners of the sheet touch the straight edge
|
||
| < 98" | 1/8" | |
| > 98" | 3/16" | |
Notice: All tolerances are subject to change without notice.
| Density, g/cc ASTM-D782A-2 | 0.90 |
| Notched Izod Impact (FT-lbs/in.) ASTM-D256-A @ 70 degrees F | 3.0 |
| Tensile Strength at Yield (psi units) ASTM-D638 2in/min. | 4000 |
| Elongation at yield (%) | 10 |
| Deflection Temp. degrees F 66psi | 194 |
| Water Absorption - 24 hrs, % ASTM-D570 | 0.02 |
| Falling Weight Impact Strength @ -29degree F (ft.lbs.) | 23 |
| Coefficient of Linear Thermal Expansion | -30 degrees C to 0 degrees C | 12 |
| 0 degrees C to 30 degrees C | 14 | |
| (MM/MM/C x [10 to the -5th]) | 30 degrees C to 60 degrees C | 21 |
| Normal temperature performance range | -17 degrees F to 160 degrees F |
| Melting point | 162 degrees C, 324 degrees F |
All information has been supplied by resin manufacturers -- Coroplast provides this data as a service and makes no warranty of information beyond our control.
Reducing environmental waste means looking for ways to reduce material used in our products, reusing products whenever possible, and recycling when the product's useful life is over.
Coroplast products contribute to the reduction of environmental waste on all three aspects.
Coroplast continues to create new products and uses based on the need to reduce, reuse, and recycle plastic. Look to Coroplast as one of the solutions.
The name Coroplast® applies to a wide range of extruded twin-wall plastic sheet products base on a high impact polypropylene copolymer.
Coroplast is a high-quality polypropylene twin-wall profile sheet formulated specifically for use in the screen printing, display and packaging markets.
Coroplast uses a copolymer resin in order to increase impact and low temperature performance. Copolymer resins are also used because the retain the ability to be flexed an unlimited number of times without breaking. We call this unique ability "a living hinge".
Chemically, the sheet is inert, with a NIL pH factor. At regular temperatures most oils, solvents and water have no effect, allowing it to perform under adverse weather conditions or as a product component exposed to harsh chemicals.
All Coroplast twin-wall profile sheets can be modified with additives, which are melt-blended into the sheet to meet the specific needs of the customer. Needs that require additives include: ultra violet protection, anti-static, flame retardancy, and color.
Coroplast products are offered in a wide range of standard, opaque and translucent colors.
| Temperature | ||
|---|---|---|
| Regent | 20°C (68°F) | 60°C (140°F) |
| Acetic Acid (10%) | Nil | Nil |
| Aceton | Nil | Nil |
| Ammonium Hydroxide (10%) | Nil | Nil |
| Benzene | Slight | Moderate |
| Carbon Tetrachloride | Moderate | Severe |
| Citric Acid (10%) | Nil | Nil |
| Cyclohexanol | Nil | Slight |
| Detergent (2% liquid) | Nil | Nil |
| Ethanol (96%) | Nil | Nil |
| Glycerine | Nil | Nil |
| Isopropyl Alcohol | Nil | Nil |
| Lactic Acid (20%) | Nil | Nil |
| Methanol | Nil | Nil |
| Methyl Ethyl Ketone | Nil | Slight |
| Nitrobenzene | Nil | Nil |
| Turpentine | Slight | Moderate |
| Xylene | Moderate | Severe |
| Temperature | ||
|---|---|---|
| Regent | 20°C (68°F) | 60°C (140°F) |
| Ammonium Hydroxide (10%) | Nil | Nil |
| Hydrochloric Acid | Nil | Nil |
| Hydrogen Peroxide (10%) | Nil | Slight |
| Nitric Acid (70%) | Nil | Nil |
| Phosphoric Acid (85%) | Nil | Nil |
| Potassium Hydroxide (50%) | Nil | Nil |
| Sodium Hydroxide (50%) | Nil | Nil |
| Sulphuric Acid (98%) | Nil | Moderate |
| Sulphuric Acid (10%) | Nil | Nil |
| Water | Nil | Nil |
* Degree of attack after 90 days under test: Concent-ration of reagent 100% unless stated.
Nil -- Negligible effect
Slight -- Some attack but function of part unimpared
Moderate -- Satisfactory for some applications
Severe -- Unacceptable
Information supplied by resin manufacturer -- Please Test for any questionable use.
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