PROPERTY
CAST AND EXTRUDED ACRYLIC TUBES
PHYSICAL PROPERTIES
Density: 20°C : 1,19 (that of glass is approx. 2,7)
Water absorption: 0,25 – 0,30% after 24 hours at 20°C; max. 0,5% after 7 daysImpermeability: Policril tubes are completely waterproof and allow the convey of liquids with high vapour pressure and gas.
Weather resistance: Policril tubes do not suffer ageing, they are not affected by sudden changes in temperature, they do not crack or deform.
Exposure to UV rays: no effect is visible after 500 hours.
MECHANICAL PROPERTIES (AT 20°C)
Tensile strength: 55-70 MPa (exceeds 90 at –40°C; decreases to 40 at +40°C)
Compressive yield stress: 70 – 90 MPa (exceeds 170 at –40°C, decreases to 30 at +40°C)
Brinell hardness: 17,9 with a 5mm sphere of weight 250kg in 3”
Moh’s hardness: 2 +/- 3 (madreperla 3, glass 6)
Modulus of elasticity: 2850 MPa
THERMAL PROPERTIES
Vicat softening temperature: 95 – 105°C
Coefficient of linear expansion: 90·10-6/°C (at 20°C)
Specific heat: 1,5 W/mK
Thermal conductivity: 0,19 W/mK
OPTICAL PROPERTIES
Refractive Index nD20: 1.493 at 20°C (sodium line)
Transmittance: for a thickness of 5mm –
- a) in the visible spectrum: superior to 92%, the loss is almost entirely due to the reflection of the surfaces.
- b) In the ultraviolet range: better than that of glass and precisely:
Nanometers:
302 27%
312 57%
314 60%
317 62%
328 64%
340 76%
N.B. : “ Policril S.a.s.” absolutely the first one in Europe tecnologically speaking in its field, is actually able to propose the complete range of acrylic cast tubes (PMMA) without any overprice in the new type “UV adsorber”, increasing and mantaining in the years the brillance characteristics of the product. On request, at the same price, used up the reserves of finish products in stock, for particular appliances (expecially in the medical field). it will be available the traditional product.
Quality and innovation, our claim to be always in the van!
- c) in the infrared range: good permeability except for absorbent rays in the frequencies 1200, 1400, 1700 Nanometers.
ACOUSTIC PROPERTIES
Policril tubes significantly deaden sound waves and can be utilised as a transparent sound proofing material.
RESISTANCE TO INTERNAL PRESSURE OF POLICRIL TUBES
The resistance to internal pressure is related to the internal diameter, to the wall thickness and the temperature. It appears therefore evident that the thickness tolerance of the walls plays an important part and it is for this reason that it is always specified and respected.
The resistance to internal pressure decreases as the temperature increases and vice versa. In practice, it has been found that it is sufficient to consider the admissible pressure equivalent to 1/5 or 1/6 of the theoretical explosion value which can be calculated using the formula:
P = 2 SK / D
Where: P is the explosion pressure in MPa S is the thickness of the wall in mm.
K is the tensile strength of the material in MPa (in our case at 20°C 56-70 Mpa)
D is the internal diameter in mm, therefore the formula can also be expressed in the following way:
kg/cm = wall thickness x 110 / internal diameter
BEHAVIOUR OF POLICRIL TUBES WITH CHEMICAL AGENTS
The solvents of Poilicril tubes are:
- methyl methacrylate monomer
- chlorinated hydrocarbons for example; ethylene chloride, methyl chloride, methylamine chloride, chloroform
- other chlorine derivatives such as carbon tetrachloride, trichloroethylenes are also solvents but not as effective as the previous listed; aromatic hydrocarbons such as benzene, toluene, xilol, etc ; aldehydes and ketones such as acetone and methyl-ethyl-ketone, acetic acid esters, ethyl acetate, butanol etc; methanol, ethanol, and butanol are solvents but only with heat, ethanol provokes swelling of the material.
Non oxidant acids and strong alkalis do not create major reactions, in general:
Acetic acid has no effect up to 20% concentration at 20°C
Nitric acid has non effect up to 10% concentration at 40°C
Acid solution for lead batteries has no effect
Butyric acid attacks if the concentration exceeds 20% at 20°C
Chloric acid attacks if the concentration exceeds 20% at 20°C
Citric acid attacks if the concentration exceeds 20% at 20°C
Chromic acid attacks if the solution exceeds 40% of CRO
Fluoride acid lightly attacks
Formic acid has non effect up to 25% concentration at 20°C
Lactic acid has non effect up to 20% concentration at 20°C
Oxalic acid has non effect up to 10% concentration at 20°C
Phosphorus acid has non effect up to 50% concentration at 20°C
Sulphuric acid has non effect up to 25% concentration even at 60°C
Tartaric acid has non effect up to 20% concentration even at 20°C
Alkalis: Ammonia has non effect in solution up to 25%
Potassium idroxide has no effect cold, with heat has no effect in solution up to 25%
Caustic soda has no effect cold, with heat has no effect in solution up to 25%
Other chemical products, apart from those already listed, behave in different ways:
- Sodium alluminate has no effect
- Acetic anhydride attacks
- Aniline attacks
- Sodium bichromate has no effect up to 40% concentration
- Sodium bisulphate has no effect up to 20% concentration
- Sodium carbonate has no effect
- Ammonium chloride has no effect
- Benzylchloride attacks
- Mercury chloride attacks
- Cyclohexane attacks
- Cyclopropane attacks
- Turpentine substitutes and methylated spirits attacks
- Hydrogen peroxide has no effect at 20% concentration
- Salt water has no effect
- petrol slightly attacks if it contains benzole or tetraethylead
- ether attacks
- Triethylamine attacks
- Petrol ether has no effect
- Gelatine has no effect
- Glycol has no effect
- normal or detergent motor oil has no effect
- Lockeed break oil attacks
- Coconut oil has no effect
- Olive oil has no effect
- Transformer oil has no effect
- Calcium hypochlorite has no effect
- Sodium hypochlorite has no effect up to 40% concentration
- Potassium iodate has no effect
- Fruit juices have no effect if they do not contain alcohol
- Butyl lactate has no effect
- Ethyl lactate has no effect
- Milk has no effect
- Lanolin has no effect
- Mercury has no effect
- Mercury chromate leaves a slight rose coloured stain
- Sodium metaphosphate has no effect
- Metatoluidine attacks
- Methylamine has no effect
- Nafta American solvent has no effect
- Nicotine attacks
- Ammonium nitrate has no effect
- Nitrobenzene attacks
- Sodium Oleate has no effect
- Medical paraffin has no effect
- Phenol attacks
- Bi and tri sodium phosphate have no effect
- Butyl stearate has no effect
- Iron sulphate does not attack, but slightly stains
- Ethyl sulphate attacks
- Copper sulphate attacks
- Tincture of iodine attacks
Gas and vapours generally do not have any effect with the exception of Sulphuric anhydride.
| VEDRIL CHEMICAL PROPERTIES | ||||||||
| Tests conducted at 20°C and 65% u.r. | ||||||||
| RR = Resists completely; RM = average resistance; NR = not resist | ||||||||
| INORGANIC ACID | ||||||||
| Boric acid | RR | |||||||
| Hydrochloric acid up to 40% | RR | Manganese sulphate | RR | |||||
| Chromic acid up to 40% | RR | Mercury sulphate | RM | |||||
| Chloro sulphuric acid | RR | Nickel sulphate | RR | |||||
| Hydrofluoric Acid up to 40% | RM | Potassium bicarbonate | RR | |||||
| Phosphoric acid up to 30% | RR | Potassium dichromate | RR | |||||
| Nitric acid up to 20% | RM | Potassium carbonate | RR | |||||
| Concentrated nitric acid | NR | Potassium cyanide | RR | |||||
| Sulphuric acid up to 40% | RR | Potassium ferricyanide | RR | |||||
| Sulphuric acid up to 80% | RM | Potassium nitrate | RR | |||||
| Sulfuric acid to 1% | RR | Potassium permanganate | RR | |||||
| Acid accumulators | RR | Potassium sulphite | RR | |||||
| Potassium sulphate | RR | |||||||
| ALKALIS | Copper chloride | RR | ||||||
| Ammonium | RR | Copper sulphate | RR | |||||
| Barium hydroxide, saturated solution | RR | Silicon tetrachloride | NR | |||||
| Potassium carbonate, saturated solution | RM | Sodium bisulfite | RR | |||||
| Sodium carbonate, saturated solution | RM | Sodium cyanide | RR | |||||
| Milk of lime | RR | Sodium chlorate | RR | |||||
| Potassium hydroxide solution, any concentration | RM | Sodium chloride | RR | |||||
| Caustic soda, any concentration | RM | Sodium fluoride | RR | |||||
| Soap solution | RR | Sodium phosphate | RM | |||||
| Sodium hypochlorite | RM | |||||||
| INORGANIC SUBSTANCES | Sodium nitrate | RR | ||||||
| Chlorine Water | RR | Sodium sulfate | RR | |||||
| Hydrogen peroxide 40 volumes | RR | Sodium sulfide | RR | |||||
| Hydrogen peroxide 120 volumes | NR | Tin chloride (dare) | RR | |||||
| Aluminium chloride | RR | Tin chloride (ico) | RR | |||||
| Aluminium fluoride | RM | Tin sulfate (ico) | RR | |||||
| Aluminium oxalate | RR | Zinc sulphate | RR | |||||
| Aluminum sulfate | RR | Zinc chloride | RR | |||||
| Aluminium Rock | RR | Zolfo | RR | |||||
| Ammonium carbonate | RR | |||||||
| Ammonium chloride | RR | ORGANIC ACID | ||||||
| Ammonium phosphate | RR | |||||||
| Ammonium nitrate | RR | Concentrated acetic acid | NR | |||||
| Ammonium sulphate | RR | Acetic acid up to 10% | RR | |||||
| Silver nitrate | RR | Butyric acid up to 5% | RR | |||||
| Barium chloride | RR | Formic acid | NR | |||||
| Barium sulfide | RR | Formic acid up to 2% | RR | |||||
| Calcium chloride | RR | Lactic acid 10% | RR | |||||
| Calcium hypochlorite | RM | Oxalic acid | RR | |||||
| Liquid chlorine | NR | Picric acid to 1% in water | RR | |||||
| Chlorine sulfuryl | NR | Stearic acid | RR | |||||
| Iron chloride (ico) | RR | Tartaric acid up to 20% | RR | |||||
| Iron chloride (dare) | RR | Thioglycolic acid up to 10% | RM | |||||
| Iron sulfate (dare) | RR | Trichloroacetic acid | NR | |||||
| Magnesium chloride | RR | |||||||
| Magnesium sulfate | RR | |||||||
| SOLVENTS AND ORGANIC COMPOUNDS | ||||||||
| Amyl acetate | NR | |||||||
| Acetato di amile | NR | Turpentine | RR | |||||
| Acetone | NR | Trichloroethylene | NR | |||||
| Allilic alcohol | NR | Tricresylphosphonate | NR | |||||
| Amyl alcohol | NR | Triethylamine | RR | |||||
| Butanol | NR | Xylene | NR | |||||
| Ethyl alcohol up to 20% | RR | |||||||
| Anhydrous ethyl alcohol | NR | GAS | ||||||
| Isopropyl alcohol | NR | |||||||
| Methyl alcohol | NR | Ammonium | RR | |||||
| Propyl alcohol | NR | Carbon dioxide | RR | |||||
| Acetaldehyde | NR | Pentoxide | RR | |||||
| Acetic anhydride | NR | Sulphur dioxide | RR | |||||
| Formaldehyde | RR | Nitrogen dioxide | RR | |||||
| Aniline | NR | Coal gas | RR | |||||
| Gasoline | RM | Hydrogen sulphide | RR | |||||
| Benzol | NR | Methane | RR | |||||
| Ethyl bromide | NR | Carbon monoxide | RR | |||||
| Ethyl butyrate | NR | Oxygen | RR | |||||
| Chlorophenol | NR | Ozone | RR | |||||
| Chloroform | NR | Bromine vapor | RM | |||||
| Ethyl Chloride | NR | Chlorine fumes | RM | |||||
| Jet fuel | RM | |||||||
| Cresol | NR | FOODS | ||||||
| Decalina | RR | |||||||
| Diacetonalcool | NR | Vinegar | RR | |||||
| Dioxane | NR | Water | RR | |||||
| Ethylene Bromide | NR | Mineral water | RR | |||||
| Dioctyl phthalate | RM | Anise | RR | |||||
| Heptane | RR | Beer | RR | |||||
| Esalina | RR | Coffee | RR | |||||
| Hexane | RR | Cinnamon | RR | |||||
| Etilcloroetere | NR | Chocolate | RR | |||||
| Light petroleum | RR | Onion | RR | |||||
| Phenol | NR | Chamomile extract | RR | |||||
| Ethyl ether | NR | Bay leaves | RR | |||||
| Phthalate diamilico | RM | Carnations | NR | |||||
| Dibutyl phthalate | NR | Milk | RR | |||||
| Glycerin | RR | Spirit | NR | |||||
| Diethylene Clicol | RR | Nutmeg | RR | |||||
| Ethylene glycol | RR | Pepper | RR | |||||
| Butyl lactate | NR | Cider | RR | |||||
| Methyl ethyl ketone | NR | Fruit juices | RR | |||||
| Monobromo mothballs | RR | Wine | RR | |||||
| Naphthalene | RR | |||||||
| Pyridine | NR | FATS, OILS, WAXES | ||||||
| Propylene | NR | |||||||
| Carbon disulphide | NR | Fatty acids, refining | RR | |||||
| Tetrachloroethane | NR | Wax floors | RM | |||||
| Tetrachloroethylene | NR | Diesel oil | RR | |||||
| Carbon tetrachloride | NR | Oils and fats | RR | |||||
| Tetrahydrofuran | NR | Mineral oils | RR | |||||
| Tetralin | NR | Mineral fats and oils | RR | |||||
| Toluene | NR | Transformer oil | RR | |||||
| DISINFECTANTS | DETERGENTS | |||||||
| Hydrogen peroxide 100 volumes | RR | Alcohol up to 20% | RR | |||||
| Carbolic acid | NR | Alcohol anhydrous | NR | |||||
| DDT | RM | Pure gasoline | NR | |||||
| Formal | RR | Chlorine bleach (sodium hypochlorite, sodium sol.22) | RR | |||||
| Chloroamine paste | NR | Chlorinated solvent-based stain remover | NR | |||||
| Lime chloride paste | RR | Aqueous solution of ammonia | RR | |||||
| Spirit (denatured ethanol) | NR | |||||||
| Up to 2% chloramine solution | RR | |||||||
| Solution of calcium chloride up to 2% | RR | |||||||
| Corrosive sublimate | RR | |||||||