Polyurethane detection and analysis is based on comprehensive indicators such as product use conditions, processing technology, production costs, etc., through experiments, identification, and optimization to obtain detection data of various raw material components and properties. Through the data in the polyurethane test report, it can provide the basis for the product development and production process improvement of the enterprise, and provide a strong technical support for the enterprise product innovation.
1. Analysis of the advantages of polyurethane testing
a. Polyurethane has a wide adjustable range and strong adaptability
b. Polyurethane has good wear resistance;
c. Polyurethane has high mechanical strength and good bonding performance;
d. Polyurethane has good elasticity and excellent recovery, and can be used for dynamic joints;
e. The low temperature flexibility of polyurethane is good;
f. Polyurethane is resistant to biological aging, has good weather resistance, and has a service life of 15 to 20 years;
g. Polyurethane has good oil resistance and is generally affordable.
2. Four major items of polyurethane testing
a. Polyurethane physical properties testing items: apparent density, tensile properties, rebound rate, compression set, abrasion, dimensional change rate, tear strength
b. Polyurethane flame retardant performance testing items: flame retardancy, thermal conductivity, flammability
c. Polyurethane sealing performance test items: closed cell rate, water absorption rate, water vapor transmission rate
d. Other performance testing items of polyurethane: wear resistance, fatigue resistance, bond strength, compressive strength
3. Detection methods and instruments for key indicators of polyurethane
a.. Tensile annual properties and tear strength (mechanical properties) of polyurethane are usually tested with a tensile machine
b.. The wear resistance and fatigue resistance of polyurethane are tested by a wear-resistant rolling machine
c.. Polyurethane strength and elongation are usually tested with a tensile testing machine
d. The hardness index of polyurethane is usually tested with a needle rubber and plastic hardness tester
e. The air tightness of polyurethane in chemical reaction will be tested by micro heat method, liquid difference method, liquid sealing method and other methods.
f. Polyurethane testing instruments: vacuum gauge, gas leak detector, air tightness leak detector, etc.
4. Testing standards for polyurethane products:
GB/T 10802-2006 General-purpose flexible polyether polyurethane foam
GB/T 11018.2-2008 Wire-coated copper winding wire-Part 2: 130-grade wire-coated direct-welded polyurethane enameled bundled wire
GB/T 19250-2013 Polyurethane waterproof coating
GB/T 20219-2015 Spray Rigid Polyurethane Foam for Thermal Insulation
GB/T 21539-2008 Polyurethane piston for concrete pump
GB/T 21558-2008 Rigid polyurethane foam for building thermal insulation
GB/T 23615.2-2017 Thermal Insulation Materials for Aluminum Alloy Building Profiles Part 2: Polyurethane Thermal Insulation Adhesive
GB/T 23997-2009 Solvent-based polyurethane wood coatings for interior decoration
GB/T 24132.3-2009 Plastic-coated fabrics for interior decoration - Part 3: Specification for polyurethane-coated woven fabrics
GB/T 24451-2009 Slow rebound flexible polyurethane foam
GB/T 24596-2009 Ductile iron pipes and fittings Polyurethane coating
GB/T 26689-2011 Rigid polyurethane foam for refrigerators and freezers
GB/T 26700-2011 Rigid polyurethane foam for door body filling
GB/T 26709-2011 Rigid polyurethane foam for solar water heaters
GB/T 27934.4-2011 Process control and detection method of paper printed matter lamination-Part 4: Reactive polyurethane (PUR) hot melt adhesive or coating film
GB/T 29047-2012 High-density polyethylene outer protective pipe rigid polyurethane foam plastic prefabricated direct-buried thermal insulation pipe and pipe fittings
GB/T 29288-2012 General technical conditions for thermoplastic rigid polyurethane foams
GB/T 30779-2014 Water-based polyurethane adhesive for shoes
GB/T 30916-2014 Spraying Rigid Polyurethane Foam Combination Polyether
GB/T 32104-2015 General technical conditions for polyurethane rubber buffer parts for rubber bladder forming equipment
GB/T 32469-2016 Plastics, polyurethane raw materials, toluene diisocyanate
GB/T 33091-2016 Polyurethane sieve plate
GB/T 8949-2008 Polyurethane dry-process artificial leather
GB/T 33092-2016 Belt conveyor cleaner polyurethane scraper
GB/T 34611-2017 Rigid polyurethane sprayed polyethylene winding prefabricated direct buried thermal insulation pipe
GB/T 35452-2017 Recycled bonded flexible polyurethane foam
GB/T 35453-2017 Rigid polyurethane foam board (DLPU) for frozen soil roadbed
GB/T 36520.1-2018 Hydraulic transmission-Dimensional series of polyurethane seals-Part 1: Dimensions and tolerances of piston reciprocating seals
GB/T 36520.2-2018 Hydraulic transmission-Dimensional series of polyurethane seals-Part 2: Dimensions and tolerances of piston rod reciprocating seals
GB 50404-2017 Technical Specification for Rigid Foam Polyurethane Thermal Insulation and Waterproof Engineering
GB/T 6109.10-2008 Enameled round winding wire-Part 10: 155 grade direct welding polyurethane enameled copper round wire
GB/T 6109.11-2008 Enamelled round winding wire - Part 11: 155 grade polyamide composite direct welding polyurethane enameled copper round wire
GB/T 6109.15-2008 Enamelled round winding wire - Part 15: 130 class self-adhesive direct welding polyurethane enameled round copper wire
GB/T 6109.16-2008 Enameled round winding wire - Part 16: 155 grade self-adhesive direct welding polyurethane enameled copper round wire
5, polyurethane test method standard
GB/T 12009.2-2016 Plastics - Aromatic isocyanates for polyurethane production - Part 2: Determination of hydrolyzed chlorine
GB/T 12009.4-2016 Plastics - Aromatic isocyanates for polyurethane production - Part 4: Determination of isocyanate content
GB/T 12009.5-2016 Plastics - Aromatic isocyanates for polyurethane production - Part 5: Determination of acidity
GB/T 22313-2008 Plastics - Polyols for polyurethane production - Determination of water content
GB/T 29493.6-2013 Determination of Hazardous Substances in Textile Dyeing and Finishing Auxiliaries-Part 6: Determination of Isocyanate Group Content in Polyurethane Prepolymers
GB/T 29493.7-2013 Determination of Hazardous Substances in Textile Dyeing and Finishing Auxiliaries-Part 7: Determination of Diisocyanate Monomers in Polyurethane Coating Finishing Agents
GB/T 32471-2016 Plastics Determination of the isomeric ratio of toluene diisocyanate for polyurethane production
GB/T 32477-2016 Plastics Determination of total chlorine content in toluene diisocyanate for polyurethane production
GB/T 30695-2014 Material identification method of polyvinyl chloride and polyurethane artificial leather (synthetic leather)
6. Polyurethane industry testing standards
HG/T 5063-2016 Solvent-based curing agent for polyurethane wood coatings
HG/T 5070-2016 Thermoplastic Polyurethane (TPU) Film
HG/T 5164-2017 Textile dyeing and finishing auxiliaries Water-based polyurethane emulsion for textile coating
HG/T 5328-2018 Polyurethane rubber sound-insulating shock-absorbing pad
HG/T 5376-2018 Two-component polyurethane adhesive for composite flexible packaging
HG/T 5456-2018 Polyurethane condoms
HG/T 2240-2012 Moisture (moisture) gas curing polyurethane coating (single component)
HG/T 2409-1992 Determination of isocyanate group content in polyurethane prepolymer
HG/T 2454-2014 Solvent-based polyurethane coating (two-component)
HG/T 2697-2017 Cots Part 2: Polyurethane Cots
HG/T 3711-2012 Polyurethane rubber vulcanizing agent MOCA
HG/T 4151-2010 Release paper for artificial leather
HG/T 4228-2011 Polyurethane chain extender HQEE
HG/T 4229-2011 Polyurethane chain extender HER
HG/T 4230-2011 Polyurethane chain extender MCDEA
HG/T 4363-2012 One-component polyurethane adhesive for automotive window glass
HG/T 4395-2012 Polyurethane rigid foam combination polyether for solar water heaters
HG/T 4574-2014 Determination method of foaming reaction characteristics of polyurethane raw materials
HG/T 4761-2014 Waterborne Polyurethane Coatings
HG/T 4900-2016 Polyurethane dust belt for belt conveyor
HG/T 4960-2016 Rigid polyurethane foam combination polyether for thermal insulation board
HG/T 4961-2016 Polyurethane rigid foam combination polyether for refrigerators and freezers
HG/T 4960～4961-2016 Rigid polyurethane foam for thermal insulation boards and polyurethane rigid foam for refrigerators and freezers combined with polyether [bound volume]
HG/T 5061～5064-2016 Coatings for automotive repair, coatings for silver mirror mirror backs, flexible protective coatings for bridge steel cables and curing agents for solvent-based polyurethane wood coatings (2016)
There are many comprehensive properties of polyurethane. Through testing, we know that polyurethane has a wide range of hardness, high strength, excellent wear resistance, oil resistance, ozone resistance, strong radiation resistance, air permeability, high tensile strength, and easy Processing and molding, various detection performances are very controllable. It is these excellent properties that make polyurethane play an irreplaceable role in many fields. Therefore, polyurethane testing has a wide range of needs, which is what we need to understand.
