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404 Not FoundJan,13,2016
Min. Order
Supply Ability
100 Per day
Payment Terms
L/C, D/A, D/P, T/T, Western Union
Business Type
Manufacturer
Nov,27,2015
Min. Order
Supply Ability
10000 yads/day
Payment Terms
L/C, T/T, Western Union
Business Type
Manufacturer Exporter
Jun,08,2016
Min. Order
200 Square Meters
Supply Ability
10000 Square Meters per Month
Payment Terms
T/T , L/C or Western Union
Business Type
Manufacturer Importer Exporter Seller
May,09,2016
Min. Order
Supply Ability
5000 piece per month
Payment Terms
T/T, 50% payment in advance ,50% balance before shipment
Business Type
Manufacturer Distributor/Wholesaler Exporter Trading Company Seller
Nov,16,2016
Min. Order
two cubic meter
Supply Ability
20-50 cubic meters per day
Payment Terms
Business Type
Manufacturer Exporter
Nov,03,2016
Min. Order
Supply Ability
120MT PER MONTH
Payment Terms
L/C, D/P, T/T
Business Type
Manufacturer Exporter
Jun,13,2016
Min. Order
100 Pieces
Supply Ability
10000 pieces per Month
Payment Terms
L/C, D/P, T/T, Western Union, Western Union
Business Type
Manufacturer Distributor/Wholesaler Exporter Trading Company Seller
Oct,17,2016
Min. Order
Supply Ability
20 tons/day
Payment Terms
L/C, T/T, Western Union
Mar,24,2015
Min. Order
Supply Ability
10000kg/day
Payment Terms
Business Type
Manufacturer
Oct,31,2016
Polyurethane Sealant Product Name: Polyurethane Sealant Type: Package: Polyurethane Sealant 103 Description It’s one component sealant that cures at ...
Nov,11,2016
Polyurethane elastomer is a new type of polymer composite materials of between rubber and plastic. Its features are as below: 1.Wide range of hardness...
Nov,03,2016
Light yellow two component polyurethane adhesive It replaces the traditional cement and pitch for:pavements, parking lots, squares, roads in garden, ...
Nov,08,2016
Min. Order
Supply Ability
200 every day
Payment Terms
T/T in advance or L/C at sight
Business Type
Manufacturer,Exporter,Seller
Nov,03,2016
Polyurethane Foam Fender This combination of materials enables extremely high compressive stresses to be absorbed, coupled with low reaction forces...
Nov,14,2016
Min. Order
Supply Ability
50mt/month
Payment Terms
30% T/T in advance, balance before goods arriving loading ...
Business Type
Manufacturer,Exporter,TradingCompany,Seller
Mar,04,2016
Supply Ability
5000 piece per month
Payment Terms
T/T, Western Union, MoneyGram
Delivery Time
Business Type
Manufacturer Distributor/Wholesaler Exporter Trading Company Seller
Mar,24,2015
Min. Order
100 Pieces
Supply Ability
10000 Piece/Pieces per Month
Payment Terms
L/C,D/A,D/P,T/T,Western Union,MoneyGram
Business Type
Manufacturer,Distributor/Wholesaler,Exporter,TradingCompany,Seller
Sep,01,2015
Min. Order
Supply Ability
50000 pieces per day
Payment Terms
as requirement
Business Type
Manufacturer,Exporter,Seller
Apr,20,2015
Min. Order
Supply Ability
25 Cubic Meter/Cubic Meters per Month
Payment Terms
T/T(30% deposit required on all orders , balance paid prior ...
Business Type
Manufacturer,Exporter,Seller,Other
Jun,21,2016
Min. Order
Supply Ability
13000 Tons per year
Payment Terms
D/P, L/C, D/A, T/T
Business Type
Manufacturer Exporter
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Select AllBonaprene Products | Polyurethane | Polyurethane Properties | Polyurethane Comparisons
Polyurethane
Bonaprene Products are manufacturers of parts in cast polyurethane elastomers under the brand name Bonathane.
Bonathane polyurethane elastomers offer the following amazing properties:
Much more&resistant to wear than mild and stainless steel
Greater impact resistant then engineering plastics such as Nylon and Polyethylene
Superior resistance to compression set, wear, load and most other mechanical forces than rubber
Impervious to petrol and mineral oils&
Much cheaper tooling than for rubber and plastic mouldings
The list of what cast polyurethanes offer goes on and on. For more details please look at the
Bonaprene?s standard grade of polyurethane, Bonathane 4NA, meets the requirements of the majority of applications. It combines the most superior physical properties with a cost effectiveness. Bonaprene offers hardness from 55 Shore A to 95 Shore A in red, black, blue, orange, yellow, green, white and natural.
Bonathane is manufactured in state of the art dispensers that control all aspects of the blending
and processing from raw materials through to shot being dispensed into the mould. This equipment
ensures a homogenous and contamination free casting giving uniform properties with in the product
and from product to product.
For lower and higher hardness and other grades and colours see the sections below&
Bonaprene?s low hardness grade of polyurethane, Bonathane 4NA, meets the requirements of the majority of applications. It combines the most superior physical properties with a cost effectiveness. Bonaprene offers hardness from 35 Shore A to 50 Shore A in red, black, blue, orange, yellow, white and natural.
Bonathane is manufactured in state of the art dispensers that control all aspects of the blending and processing from raw materials through to shot being dispensed into the mould.&
Bonaprene?s Bonathane 1FA range of high hardness, high load bearing polyurethanes. Bonathane 1FA grades can be used where high hardness is required as the range goes from 80 Shore A up to 60 Shore D with 75 Shore D available as a special request. Bonathane 1FA is used in applications where wheels and rollers are subject to very high loads. Examples include bridle
drive and idler rolls on debarking drums and concrete pipe launch wheels. Bonathane 1FA is used in applications where hydrolysis and heat resistance is required such as hydro cyclones in the paper industry.
The following table gives an idea of how the different hardness compare.
Hardness Guide
Shore Scale
Description
Rubber band
Inner tubes
Car tyre treads
Fork lift truck tyres
Polyethylene rigid plastic
Nylon rigid plastic
Bonaprene?s Bonathane 5NA range of hydrolysis and temperature resistant grades are used where conditions exceed those of the Bonathane 1FA range of polyurethanes. Bonathane 5NA use sophisticated polyol resins blended with a range of curatives to match requirements. Hardness?s from 75 Shore A to 70 Shore D are available. Typical environments are rollers operating in hot inorganic acid vapours to high temperature hydro cyclones operations.
Bonaprene?s Bonathane 3FA grade is a range of high resilience and temperature resistant polyurethanes. Bonathane 3FA polyurethanes are used where the environment is hot and vibration insulation is required to control NVH (noise, vibration & harshness). Applications include mounts on commercial vehicles operating in hot engine bays to isolate vibration.
Bonaprene?s Bonathane 3NAFR and 4NAFR grade ranges offer polyurethanes with fire retardant and anti static properties. Hardness ranges from 60 Shore A to 90 Shore A and hardness?s in the range have been tested and certified for use in the mining industry. These Bonathane grades have been tested to the standards set out in the former British Coal Memorandum RD/NMMB (84) 1 method 2 and the former British Coal Specification 158/1989 by the Cerberus Mining Acceptance Service.
Bonaprene?s Bonathane 4NASF grade is a range of silicone free polyurethanes. Bonathane 4NASF retain all the properties of the 4NA standard range. Parts moulded from Bonathane 4NASF are used where no silicone can be in the working environment. Examples include the many paint application industries such as strip coating, can decorating and car building as well as other industries such as aerospace carbon fibre manufacture. Bonaprene combine the Bonathane 4NASF polyurethane with the use of silicone free release agent in the mould processing.
The Polyurethane Elastomer Group of the BRMA has produced this guide as a general introduction to the properties and applications of Polyurethane Elastomers.
To the chemist they are polymeric materials containing urethane groups.
(-NH-CO-O-), produced by the reaction of a polyol with an isocyanate. To the engineer they are materials offering a number of unique properties to meet a range of demanding applications.
To the accountant they are materials, which can be processed with low energy consumption and relatively low capital outlay for machinery to yield products, which show cost savings through improved performance.
Polyurethane Elastomers are unique in design and construction materials combining many of the advantages of rigid plastics, metals, and ceramics with the extensibility of rubber.
It is not claimed that Polyurethanes are the answer to all problems but they are extremely versatile and this is the key to their widespread and growing use
Comparison of Common Elastomers
Polyurethane (PU)
Natural Rubber
Styrene Butadiene (SBR)
Neoprene (CR)
Nitrile (NBR)
Ethylene Propylene (EPDM)
Hypalon (CSM)
Silicone (Si)
Temp Range (Celsius)
-40 to +100
-50 to +70
-50 to +70
-20 to +120
-40 to +120
-40 to +120
-20 to +150
-100 to +250
Compressions Set
Water (cold)
Gas Permeability
Electricity
Why this versatility?
Polyurethane Elastomers offer a very wide hardness range in which items can be produced. They range from 10-15° Shore A which is softer than a gum eraser to over 90° Shore D which is much harder than a golf ball. For these unfamiliar methods of measuring hardness, the illustration (Chart B) below may be of help for all practical purposes, Shore A is interchangeable with IRHD (International Rubber Hardness Degrees)
In applications where severe wear is a problem, Polyurethane Elastomers offer outstanding durability when compared with Rubber, plastics or even metal. In many applications the unusual combination of properties has made it possible to design and fabricate products from Polyurethane Elastomers using less material than has been possible with other elastomers.
It should be emphasised, however that abrasion resistance is a complex property. Selection of the proper formulation of Polyurethane Elastomer should be based on actual experience or simulated service tests
Polyurethane Elastomers have greater load-bearing capability than do conventional Elastomers of equal hardness. The capacity is a highly important advantage in some designs e.g. stripper springs, whilst in others it is the very factor that makes them possible. In addition to high load bearing properties in both tension and compression, Polyurethane?s have a high load bearing capacity in shear.
At lower hardness levels, practically all elastometric materials ? including Polyurethane?s- merely bend under impact. As conventional Elastomers are compounded up to higher hardness they tend to lose elasticity and crack under impact. On the other hand Polyurethane Elastomers even at their highest hardness levels, have significantly better impact resistance than almost all plastics.
Such great toughness combined with the many other outstanding properties associated with the high hardness Polyurethanes, leads to many applications in engineering.
Resilience in conventional rubbers is generally a function of hardness. This often-undesirable relationship does not hold true with Polyurethanes. Formulations are available in a very wide range of resilience.
For very shock absorbing uses, low rebound compounds are usually used i.e. rebound value of 10-40%. For high frequency vibrations or where quick recovery is required, compounds in the 40-65% rebound value are used.
Polyurethane Elastomers resist cracking under repeated flexing. As with any elastomer, the rate of cut growth under decreasing the thickness of the part may reduce flexing. Unlike other Elastomers however, Polyurethane Elastomers can be utilised practically in very thin sections because of their strength and toughness.
Many Polyurethane Elastomers remain flexible at very low temperatures and possess outstanding resistance to thermal shock. The low temperature resistance of Polyurethanes has led to many applications in Arctic conditions.
Whilst many Polyurethane Elastomers are only suitable for continuous operation up to 90°C, intermittent use up to 120°C or even higher can be achieved. Advice on the most suitable material for any particular application should be sought from your processor or raw material supplier.
Depending on type, Polyurethane Elastomers are very resistant to the swelling and deteriorating effects of water immersion and have excellent long-term stability in water up to 50°C. Continuous use in hot water over 80°C is not recommended.
Water absorption is very low (in the range of 0.3 to 1% by weight) and volume swell is negligible. This means for example, that Polyurethane Elastomers can operate at close tolerance in water lubricated bearings without fear of seizure.
The moisture vapour transmission rate of Polyurethane Elastomers is relatively high and advantage is taken of this fact in some applications e.g. poromeric shoe upper materials. However where this property might be disadvantageous, the advice of the processor or raw material supplier should be sought on the suitability of Polyurethane Elastomers for any particular application.
Some Polyurethanes have very good insulating properties and are used in many potting and encapsulating applications.
Products made from Polyurethanes are highly resistant to degradation by atmospheric oxygen and ozone. Tests on samples, aged over 500 hours in an atmosphere containing 3 ppm ozone, show no attach even while under 20% strain. Past experience for several hundred hours are virtually immune to attack by normal atmospheric concentrations.
This makes Polyurethanes highly successful when employed around electrical equipment, without hardening and cracking often experienced with conventional Elastomers and indeed many plastics.
Whilst many rubbers and plastics have excellent resistance to one or more specific solvents, oils or chemicals, the wide resistance of Polyurethanes to chemical attack means that they can be used in a multitude of environments with the exception of strong solvents.
As with all materials being examined for oil and chemical resistance, it is best to place a sample of the material in actual service. If this is not practical, tests should be devised which simulate actual service conditions as closely as possible.
Polyurethane Elastomers are considered to have the best resistance to gamma ray radiation of all Elastomers. They retain a high proportion of their original flexibility and toughness whilst exposed to gamma radiation.
Special compounds containing flame-retardants can be formulated to meet several self-extinguishing or non-burning specifications.
Suitably compounded Polyurethane Elastomers, usually Polyether based, do not support fungus growth and are generally resistant to such attack.
There are available many different types of polyol and several types of isocyanate. By selection of the right combination materials can be produced which are soft or hard, flexible or rigid but still retain the toughness and durability associated with Polyurethanes.
In addition to this wide choice of chemical combinations the large number of possible additives is considered, then the range of end products becomes very extensive. For example, catalysts can be chosen to give rapid or extended cure rates. Blowing agents can be used to produce foams, various additives can be employed to impart specific properties, e.g. flame retardant, antistatic, colour etc.
There are several methods of processing Polyurethane Elastomers and selection of the most suitable one enables either long or short production runs to be accomplished efficiently and economically.