Moisture resistant microbial penetration tester

The horizontal flammability tester obtains the flame spread trend and flame spread speed of the material during combustion by measuring the time required for a certain burning distance. The flammability of the product is graded to evaluate the flame retardant performance of the material.

Used for testing the relative burning rate and flame retardancy of textiles, especially automotive interior decorative fabrics.

Fume hood and fire extinguishing equipment are optional for complete combustion test.

The test principle of

1. The equipment provides a flame burning source, which can manually adjust the height specified in the flame value standard, and then automatically ignite and extinguish the flame.

2. Observe and record the combustion phenomenon when the flame ACTS on the sample.

Timed combustion in conjunction with a timer.

Test standard

This horizontal combustion tester meets but is not limited to the following standards:

GB 8410, QB/T 2729, ASTM D5132, SAE J369, FMVSS 302, ISO/NP 17074, ISO 3795, DIN 75200, etc.

standard

FMVSS 302 Federal Automotive Safety Standard 302

ISO 3795

GB/T8410-2006

Other relevant standards:

SAE J369:2003 -- American Society of Mechanical Engineers

HES D6003-99 -- Honda Motor Co

NES M0094:2003 -- Nissan Motor;

Es-x60410 :2001 -- Mitsubishi Motors

TRANS/WP29/78/Rev.1:1997 Annex 4 -- European Union

TL 1010:1997-- Volkswagen;

GS - 97038-2003 BMW;

GM 9070P:1996-- General Motors

Related terms

Combustion velocity: the ratio of measured combustion distance to the combustion velocity in millimeters per minute (mm/min);

Combustion distance: refers to the length of the burned part on the surface or inside of the sample;

Laminated composite material: any of a number of similar or different materials, the surfaces of which are fully bonded together by means of fusion, bonding, welding, etc.

Single material: Uniform, monolithic material made of the same material.

If different materials are intermittently connected together, it is not considered as laminated composite, and each material is a single material.

Exposed surface: the parts are assembled on the passenger side of the car;

Interior materials: vehicle interior materials usually use of a single material or laminated composite materials, the main types are: interior lining guard board, ceiling, floor covering, seat fabric, luggage cover, instrument panel, curtain, and any other indoor hood covering organic material, including packing, buffering device crash to absorb collision energy etc.

The instrument is mainly composed of a combustion chamber and a control chamber. Each part consists of:

A. Combustion chamber: stainless steel material, wire-drawing treatment;

A foot is fitted to facilitate the flow of gas;

There is a large area of heat-resistant glass in front, which is convenient to observe the test phenomenon.

Exhaust window is set on the upper side;

The top can be opened.

B. Thermometer: fixed and removable on top cover of combustion chamber.

Used to detect the temperature before, during and after the test.

C. Sample clip: placed in the combustion chamber, u-shaped clip can be placed above, and no-load plate for carrying combustion dripping can be placed below.

The position should not be moved during the test.

D. U-clip: A sample of standard size, consisting of two upper and two lower pieces, fixed together by pins, with a marking line in the designated position.

And has been equipped with heat resistant support wire.

Combustion tester/horizontal combustion tester tests the relative combustion rate and flame retardancy of textile fabrics, clothing, tents, especially automotive interior fabrics.

I. Test Principle:

After the sample is clamped horizontally on a U-shaped bracket and ignited for 15s at the free end of the sample with a specified height flame in the combustion chamber, it is determined whether or when the flame on the sample goes out, as well as the burning distance of the sample and the burning time of the distance.

Ii. Test Samples:

1. Shape and size

Standard sample shapes and sizes.

The thickness of the sample shall be the thickness of the part, but not exceeding 13mm.

When comparing the combustion properties of different materials, the sample must be of the same size (length, width and thickness).

In general, the sample must have the same cross section along the full length of the sample.

When the shape and size of the part are insufficient to make standard samples of the specified size, the following minimum size samples shall be guaranteed, but shall be recorded:

A) If the width of the part is between 3mm and 60mm, the length shall be at least 356mm.

In this case the specimen should be made as close to the width of the part as possible.

B) If the width of the part is greater than 60mm, the length shall be at least 138mm.

At this point, the possible burning distance is equivalent to the distance from the line to the flame extinction or from the start of the line to the end of the specimen.

C) If the width of the part is between 3mm and 60mm and the length is less than 356mm or the width of the part is greater than 60mm and the length is less than 138mm, the test shall not be conducted in accordance with this standard;

Specimens with a width less than 3mm shall not be tested in accordance with this standard.

Sample 2.

At least 5 samples shall be removed from the part under test.

If there are materials burning at different rates in different directions, samples should be intercepted in different directions, and 5 (or more) samples should be tested separately in the combustion chamber.

Sampling method is as follows:

A) When the material is supplied at the full width, the sample containing the full width and at least 500mm in length shall be intercepted, and the material 100mm from the edge shall be cut off, and the rest of the material shall be equally spaced and sampled evenly.

B) If the shape and size of the part meet the sampling requirements, the sample shall be taken from the part.

C) If the shape and size of the part do not meet the sampling requirements, the test must be carried out in accordance with this standard. The standard sample (356mm×l00mm) with the same material and process can be made and the minimum thickness of the part shall not exceed 13mm for the test.

The test results cannot be used for identification, certification, etc., and the sample preparation must be indicated in the test report.

D) If the thickness of the part is greater than 13mm, the sample including the exposed surface shall be machined from the non-exposed surface to a thickness of 13mm.

E) If the thickness of the part is not uniform and consistent, mechanical method shall be used to cut from the non-exposed surface to make the thickness of the part uniform to the minimum part thickness.

F) If the bending part fails to obtain the flat sample, the flat part shall be taken as far as possible, and the arch height of the sample shall not exceed 13mm;

If the arch height of the sample exceeds 13mm, a standard sample (356mm×l00mm) with the same material and process shall be made. The minimum thickness of the part shall not exceed 13mm for testing.

G) Laminated composite materials shall be considered as a single material for testing, and the sampling method is the same as above.

H) If the material is composed of several laminates but not laminated composite materials, the single material of all layers shall be sampled and tested separately within 13mm thickness from the exposed surface. The interface between material A and material B is not bonded, and material A shall be tested separately.

The thickness of material B is within 13mm, and it is closely bound to material C. Therefore, material B and C should be used as laminated composite materials, and 13mm should be cut for the test.

3. The preprocessing

Before the test, the sample should be regulated in the standard state of temperature 23℃±2℃ and relative humidity 45% ~ 55% for at least 24h, but not more than 168h.

Iii. Test Steps:

1. Take out the pre-treated samples, place the surface fluff or tufted samples on the flat table, and comb the fluff in the opposite direction on the fluff surface twice with the metal comb in accordance with 4.2.5.

2. Light the gas lamp when the air inlet of the gas lamp is closed, and adjust the flame according to the flame height marker plate, so that the flame height is 38mm.

Before starting the test, the flame should burn steadily in this state for at least 1min and then go out.

3. Load the exposed surface of the sample into the sample bracket face down.

Install the specimen so that both sides and one end are clamped by the U-shaped bracket, and the free end is aligned with the u-shaped bracket opening.

When the specimen width is insufficient, the U-shaped bracket cannot clamp the specimen, or the soft and flexible free end of the specimen will cause unstable combustion, the specimen shall be placed on the specimen bracket with heat-resistant metal wire for combustion test.

4. Push the sample support into the combustion chamber. Place the sample in the center of the combustion chamber and place it in a horizontal position.

Light the gas lamp when the air inlet of the gas lamp is closed, and make the flame height be 38mm, make the sample free end in the flame to ignite for 15s, and then turn off the flame (close the gas lamp valve).

5. The flame burns forward from the free end of the sample, and the timing starts at the moment when the flame root passes the marking.

Pay attention to the flame propagation on the fast burning side, the time to the flame propagation on the fast side.

6. When the flame reaches the second line or the flame is extinguished before reaching the second line, the timing shall be stopped at the same time. The timing shall also be based on the side with faster flame propagation.

If the flame is extinguished before reaching the second mark, measure the burning distance from the mark to the time the flame is extinguished.

Combustion distance refers to the length of the burned part on the surface or inside of the sample.

7. If the non-exposed surface of the sample has been cut, the timing shall be based on the flame propagation speed of the exposed surface.

8. The combustion velocity requirement does not apply to the surface formed by cutting the sample.

9. If the sample burns slowly for a long time starting from timing, the test can be stopped when the test timing is 20min, and the combustion time and combustion distance can be recorded.

A, use

The horizontal combustibility tester obtains the flame spread trend and the flame spread speed of the material during combustion by testing the time required for a certain distance of combustion. The flammability of the product is graded, and the flame retardant property of the material is evaluated accordingly.

Used for testing the relative burning rate and flame retardancy of textiles, especially automotive interior decorative fabrics.

Fume hood and fire extinguishing equipment are optional for complete combustion test.

Second, the test principle of automobile interior ornament combustion tester

1. The equipment provides a flame burning source, which can manually adjust the height specified in the flame value standard, and then automatically ignite and extinguish the flame.

2. Observe and record the combustion phenomenon when the flame ACTS on the sample.

Timed combustion in conjunction with a timer.

standard

FMVSS 302 Federal Automotive Safety Standard 302

ISO 3795

GB/T8410-2006

Other relevant standards:

SAE J369:2003 -- American Society of Mechanical Engineers

HES D6003-99 -- Honda Motor Co

NES M0094:2003 -- Nissan Motor;

Es-x60410 :2001 -- Mitsubishi Motors

TRANS/WP29/78/Rev.1:1997 Annex 4 -- European Union

TL 1010:1997-- Volkswagen;

GS - 97038-2003 BMW;

GM 9070P:1996-- General Motors

Iii. Technical specifications

Combustion chamber: W368mm×D216mm×H356mm;

Foot: 10mm;

Ventilation hole: 19mm×10;

Exhaust window: height 13mm;

Width of observation window :330mm

Sample frame: 255mm×200mm× 170mm

U-type sample clip: 355×25×10 mm, internal margin 50mm;

Supporting wire: 0.25mm, high-temperature resistant metal wire;

Spacing of supporting threads: 25mm

Bunsen burner: 9.5mm;

Thermometer: 150℃, accuracy less than 1℃;

Control box: 390mm×200mm×390mm;

Ignition time: 15s

Timing: accurate to 0.1s

Power supply: 220V, 50Hz

4. Advanced industrial appearance and control design;

1. Stainless steel structure box;

Bottom vent spacing: transverse 63.5mm, longitudinal 127mm.

2. Number of ventilation holes: 10, diameter: 19mm.

3, the burner for Φ 9.5 mm inner diameter.

The tip of the blowtorch is 19mm below the center of the free end of the sample

4, the flame applied time and timing (combustion) time

5. Adjustable within 0 ~ 9999 seconds.

6. Equipped with: stainless steel sample holder and sample template;

7. Built - in steel plate ruler in combustion chamber;

Precision: 1mm;

The combustion length can be easily read;

There is no need to take out the sample to measure the combustion length;

8. Imported Hamburger Bunsen lamps from The United States are used, with higher flame accuracy and adjustment range of 20mm ~ 100mm.

9. Flame measuring device;

Flame height: 38mm