Where can I test the physical properties of FRP?

What are the physical properties of steel, ** can be tested physical properties inspection (inspectionofplaysicalproperties), experimental testing of physical performance indicators in the performance inspection of metal plastic processing products. The main test items are magnetic properties, density, elastic modulus, thermal expansion coefficient, resistance value, etc.

The physical properties of FRP are tested by Inger for analysis, and it has its own independent laboratory

1. About epoxy resin product standards.

This column publishes the national standards, ministerial standards, and industry standards for epoxy resin products in China, and will also appropriately introduce some foreign standards. As for the industry standard, it was previously formulated by the industry association on behalf of the relevant state departments and became the national standard. However, in the past 15 years, this work has been basically interrupted, which is not conducive to the development of the industry.

To this end, the China Epoxy Resin Industry Association will launch the "industry standard" plan, and gradually formulate industry standards for products with backward and missing factors, standardize them, and standardize and improve them according to the relevant requirements if possible, so as to make them become national standards.

Second, the national standard objectives of epoxy resin.

1. Basic standards.

GB T1630—1989 epoxy resin nomenclature.

GB T2035—1996 Plastic terms and their definitions 2, product standards.

GB T13657—1992 Bisphenol A epoxy resin 3, method standard.

GB T4612—1984 Determination of epoxy equivalent of epoxy compounds.

GB T4613—1984 Determination of inorganic chlorine of epoxy resin and glycidyl ether.

4. Determination of soap machine chlorine.

GB T4618—1984 Determination of saponified chlorine of epoxy resin and related materials.

5. Gardner chromaticity method.

GB epoxy color determination method, Gardner colorimetry.

GB Epoxy Sodium Ion Determination Method.

GB Method for determining the total chlorine content of epoxy resins.

GB Epoxy Viscosity Determination Method.

Methods for determining the density of GB epoxy resin, pycnometer method.

Method for determining the softening point of gb epoxy resin.

Gb epoxy resin gel time determination method.

Q 5S69—94 Determination of epoxy equivalent of epoxy compounds—non-aqueous titration of hydrogen bromide-glacial acetic acid.

China Aviation Corporation No. 014 Center Standard).

6. Determination of physical properties.

GB T1732—1993 Paint viscosity determination method.

GB T2794—1995 Methods for determining viscosity of adhesives (rotational viscometer method) GB T2567—1995 General principles for testing methods for mechanical properties of resin casting bodies.

GB T2568—1995 Tensile test method for resin casting.

GB T2569—1995 Compression test method for resin casting.

GB T2570—1995 Bending test method for resin casting.

GB T2571—1995 Impact test method for resin casting.

GB T4726—1984 Torsion test method for resin casting.

FRP, alias: glass fiber reinforced composite plastic, is made of glass fiber reinforcing agent and unsaturated polyester, epoxy resin and phenolic resin adhesive as the basic composition. Due to the different types of resins used, it is known as polyester FRP, epoxy FRP and phenolic FRP.

FRP detection.

Detection scope: FRP tank: FRP storage tank, hydrochloric acid storage tank, sulfuric acid storage tank, anti-corrosion storage tank, chemical storage tank, transportation storage tank, food tank, fire tank, etc.

FRP pipe: FRP pipe, FRP sand pipe, FRP air duct, FRP cable pipe, FRP pipe jacking, FRP process pipe, etc.

Tower: drying tower, washing tower, desulfurization tower, acid mist purification tower, exchange column, etc.

Others: angle steel, trunking, pultrusion profiles, tees, tees, FRP grilles, FRP septic tanks, etc.

FRP detection.

Test items: mechanical properties: flexural strength, tensile strength, compressive strength, impact strength, etc.;

Optical properties: light transmittance, refractive index, etc.

Thermal properties: specific heat, thermal conductivity, thermal deflection temperature, flame resistance, self-extinguishing, etc.;

Electrical properties: surface resistance, volume resistance, breakdown resistance, dielectric constant, arc resistance, etc.

Chemical properties and media resistance: water resistance, solvent resistance, alkali resistance, oil resistance, etc.;

Conventional performance indicators: specific gravity, hardness, density, resin content, water absorption, wear resistance, pore content, etc.

Aging test: natural aging, artificial accelerated aging, salt spray test, halogen aging test, ozone aging test, etc.

Component analysis items: component analysis, principal component analysis, comparative analysis, unknown material analysis, graph analysis, failure analysis, full component analysis, molecular weight analysis, qualitative and quantitative analysis, grade identification, material identification, formula reduction, etc.

FRP detection.

Test method for tensile properties of fiber-reinforced plastics GB T1447-2005

Test method for compressive properties of fiber-reinforced plastics GB T1448-2005

Test method for flexural properties of fiber-reinforced plastics GB T1449-2005

Test method for impact toughness performance of fiber-reinforced plastic Charpy beam type GB T1451-2005

Test method for aging properties of glass fiber reinforced plastics GB T2573-2008

Test method for combustion performance of fiber reinforced plastics Oxygen index method GB T8924-2005

Test method for thermal conductivity of fiber-reinforced plastics GB T3139-2005

Test Methods for Enhanced Products Part 1: Determination of moisture content in GB T

CB General Purpose FRP Motorized Work Boat Type and Main Size.

CB 1029-1983 FRP Initial Ammunition Box.

CB Strength calculation of FRP members for single-layer structures.

CB Strength calculation of FRP members for sandwich panels.

Impact resistance silver pin test, atmospheric pressure test, light test.

Generally, the main thing to test tempered glass is to test its strength, that is, impact resistance. This point uses more physical test methods, that is, the weight of the measured strength is used to collide with the glass, but this method of testing and fighting is destructive, can not be fully detected, can only be sampled, in addition to the test of glass strength can be used in the way of atmospheric pressure, so that the strength is easier to control.

There are many ways to detect this kind of physical detection, as long as you can ensure that the gravity of the strength of the tempered glass can be controlled and calculated with the sock file, there will generally be professional instruments to detect.

If you are at home, then use a rubber hammer to test whether the strength of the glass you buy is enough, and you can generally distinguish ordinary glass from tempered glass by looking at the thickness. If the production of tempered glass needs to be tested, there will be quality inspection. It's good to flip through the file, the document will specifically require where to write the test items, and the tempered glass is in line with the standard as long as it is certified by the standard, and no additional testing is required.

But if the tempered glass you buy has not been tested and you want to test it yourself, it can only be to see how much it can bear. However, this kind of test is risky and destructive, so it is not recommended to take it, and the purchase of tempered glass should be purchased from a regular manufacturer.

Impact Test:

1. Lift the impact body with a flexible wire rope with a diameter of 3 mm, so that the outer periphery of the largest diameter part of the cross-section of the impact body is less than 13 mm from the surface of the specimen and within 50 mm from the center of the specimen.

2. Keep the center position of the maximum diameter of the impact body at a drop height of 300 mm, swing freely and fall, and impact the center point of the sample once near the center point. If the specimen is not damaged, raise it to 750 mm and hit it again near the center point of the same specimen.

3. When the sample is still not damaged, it will be raised to a high modulus level of 1200 mm, and it will be impacted once near the center point of the same sample.

4. When the falling height is 300mm, 750mm or 1200mm specimen is damaged, within 5min after the destruction, the largest 10 pieces are selected from the glass fragments, and the mass is called the mess. and measure the length of the longest glass fragment that remains in the frame without penetrating cracks.

Surface stress test

1. At a distance of 100mm from the long side, lead two parallel lines parallel to the long side, and intersect with the diagonal at 4 points, and the 4 points and the geometric center point of the product are the measurement points.

2. The surface is loaded with heavy objects.

3. After the signs of damage begin to appear, measure the length of the fracture through the crack.

Tested for cold and heat resistance

The 300mm 300mm tempered glass sample is placed in the oven of 200 2, kept warm for more than 4 hours, and the sample is vertically immersed in the ice-water mixture of 0 immediately after being taken out, and the height of the sample should be ensured to be immersed in water above 1 3, and the glass is observed to be damaged after 5min.

Tempered glass inspection content and method.

1. Size and appearance inspection.

1.Dimensional measurement: According to the product drawing, use calipers to measure its key dimensions (length, width, thickness, hole position, etc.).

2.Visual inspection: In the standard light source color light box, wear anti-static gloves, hold the product at a distance of 20cm, and visually inspect whether there are dirt, black spots, cracks, etc

Scratches and other undesirable appearances.

2. Light transmittance test.

Use a 3M film meter to test the light transmittance of the product.

3. Ball drop test.

Put the product to be tested on a smooth and flat steel plate, the steel plate has a 30cm round hole in the center of the product, use a 32g heavy steel ball, 30cm directly above the product, carry out a free fall ball, and carry out 3 falling ball tests to observe whether the surface of the product is bruised or broken.

For products of different thicknesses, the height of the ball is 30cm for the product and 40cm for the product;

Fourth, bending performance test.

1.Put the product on the fixture as shown in the figure below, press down the pressure rod to deform the product, and observe the deformation of the product.

5. Glue walking and lamination test.

Take the product, gently peel off the release film on one side of the mobile phone, tear up the area of about 40% of the total area of the product, and then slowly put back the release film to observe whether the release film will automatically paste back to the surface of the product, and will not produce bubbles and air lines.

Repeat the test 2 times for the above steps.

6. Surface pencil hardness test.

1.For pencils, use a sharpener to cut off the wood to expose a 5-6mm refill, taking care to ensure that the refill is an undamaged cylindrical shape. Hold the pencil holder (when using a drawing refill) perpendicular to the sandpaper, and keep this vertical position and polish the tip of the refill until you get a smooth, flat circular section with no chips or chips around the perimeter of the section.

A compliant edge can also be obtained by sanding the refill by gluing sandpaper to a platform driven by a motor. Fix the pencil in the direction perpendicular to the platform and the resulting refill will be more consistent.

2.Place the sample on a flat level table, starting with the hardest pencil, and use a pencil hardness tester to hold the pencil at 45 degrees from the surface of the sample, with the nib direction away from the operator and swiping away from the operator. Whether it's hanging up, scratching the paint film, or breaking the refill, every effort should be made to ensure that the forward and downward pressure is consistent in this concentrated situation.

The recommended length of the scratch is:

3.Continue with the above test until a pencil does not scratch the sample, and record the hardness of the abrasion.

4.Make at least two abrasions for each pencil or refill.

I'm more curious about whether your production is 5mm thick or bai50mm thick glass. I didn't do du over the glass of the hood, but zhi

I'm still on tempered glass or dao

Very familiar. Tests are done frequently.

Now that you know the GB version, the above experiment is very clear. There are 5 experiments that are clear above. It is the impact resistance test, the fragmentation test, the scatter bag test, the stress test, and the heat resistance test.

The corresponding judgment criteria are as follows: Item 1. The corresponding experimental procedure is the first one.

We all do it in accordance with the national standard. The impact resistance test requires a smooth ball with a diameter of 1024 grams and an impact height of 1 meter. However, this experiment can basically be achieved with tempered glass above 5mm.

The simplest and most important thing is the fragmentation experiment, according to the steps to smash a piece of glass can be judged, do not be wasteful, it is a must, we often smash. If the fragments are qualified, the stress is OK. As for the scattering bomb test, if it is to be installed, we will do it at the time of 3C certification or customer inspection, and usually do less.

You are making the glass of the range hood, and I think the heat resistance experiment is very important.

It is recommended that you must do two tests: fragmentation test and heat resistance test, if you don't understand, you can find me.

It is recommended to refer to JC T 1006-2006 standard for glazed tempered and glazed semi-tempered glass;

Combine Safety Glass for Architectural Use Part 2: Tempered Glass and GB17841 Tempered Glass and Semi-Tempered Glass for Curtain Walls standard.