Resin film tensile testing machine

Resin film tensile testing machine★ Bending Test ★ Pull Force Puncture Force Test 1 Theme Content

This standard specifies various soft composite plastic materials for plastic composites on plastics or other substrates (such as aluminum foil, paper, fabrics, etc.)

Determination of detachment force.

2 Principles

Perform T-shaped peeling on a sample with a specified width at a certain speed, and measure the average peeling force between the composite layer and the substrate

3 Experimental equipment

A tensile testing machine with a graphical recording device, or other devices that meet the requirements of this test.

4 samples

Testing 4.1

sample size

A method

Width 15.0 ± 0.1mm, length 200mm. Used for composite films, etc.

B method

Width 30.0 ± 0.2mm, length 150mm. Used for artificial leather, woven composite bags, etc.

4.2 Sample Preparation

Remove 50mm from both ends of the sample in the width direction, and evenly collect 5 longitudinal and 5 transverse samples along the width direction of the sample. The composite direction is longitudinal.

Peel off the composite layer and substrate along the length direction of the sample by 50mm in advance, and there should be no obvious damage to the peeled off part. If the sample is difficult to peel off

One end of the sample, approximately 20mm in size, can be immersed in a suitable solvent for treatment. After the solvent evaporates, the peel strength test can be conducted. If the composite layer

If this treatment still cannot separate from the substrate, the experiment cannot be carried out.

5. State regulation and testing environment

The sample should be placed in an environment with a temperature of 23 ± 2 ℃ and a relative humidity of 45%~55% for more than 4 hours, and then tested in the above environment

Test.

6 Test speed

A method

300±50mm/m/n; Equipped with programmable and mechanical two-level limit protection; When the load exceeds the rated value by 5-10%, automatic shutdown protection is provided; Meets standard: QB/T1130 Plastic Right Angle Tear Performance Test Method Meets standard: GB13022 Plastic Film Tensile Performance Test Method Meets standard: GB/T16578-1996 Plastic and Film Pant Tear Method Meets standard: GB/T1040 Plastic Tensile Performance Test Method

B method

200 ± 50mm/min. Equipped with programmable and mechanical two-level limit protection; When the load exceeds the rated value by 5-10%, automatic shutdown protection is provided; Meets standard: QB/T1130 Plastic Right Angle Tear Performance Test Method Meets standard: GB13022 Plastic Film Tensile Performance Test Method Meets standard: GB/T16578-1996 Plastic and Film Pant Tear Method Meets standard: GB/T1040 Plastic Tensile Performance Test Method

7 Experimental Steps

Clamp the two ends of the peeled part of the sample onto the upper and lower fixtures of the testing machine, so that the longitudinal axis of the peeled part of the sample is aligned with the center of the upper and lower fixtures

Align the lines and tighten them appropriately. During the experiment, the unpeeled part was in a T-shape with respect to the stretching direction, as shown in Figure 1. Record the peeling process of the sample during the peeling process

Force curve. C. Sample width and testing speed;

d. The arithmetic mean of the peeling force in the vertical and horizontal directions;

e. If necessary, the standard deviation and values of peel strength should be provided;

f. Sampling date, testing date, and testing personnel.

Additional explanation:

This standard was proposed by the Ministry of Light Industry of the People's Republic of China.

This standard is under the jurisdiction of the Plastic Processing and Application Science Research Institute of the Ministry of Light Industry.

This standard was drafted by the Institute of Plastic Processing and Application Science of the Ministry of Light Industry.

The main drafters of this standard are Zeng Xinrong and Li Deying.

This standard adopts DIN53357-82 "Plastic Tape and Film Test - Film Peel Test" for reference.

The universal material testing machine complies with the standard "GB/T16491-1996 Electronic Universal Testing Machine" for computerized universal material testing machines GB 8808/GB 13022/GB 1040/GB 4850/GB 7753/GB 7754/GB 453/GB/T 17200/GB/T 16578/GB/T 7122/GB/T 2790/GB/T 2791/GB/T 2792/ASTM E4/ASTM D828/ASTM D882/ASTM D1938/ASTM D3330/ASTM F88/ASTM F904/ISO 37/JIS P8113‖QB/T 2358/QB/T 1130/ Waiting for experimental standards

Spring steel tensile testing machine

I. Overview

Spring steel tensile testing machine: This machine can perform tensile, compressive, bending, tearing, 90 degree peeling, 180 degree peeling, shear, adhesive force, pull-out force, elongation at extension and other tests on rubber, plastic, foam materials, plastics, films, flexible packaging, pipes, textiles, fibers, nanomaterials, polymer materials, composite materials, synthetic materials, packaging tapes, paper, wires and cables, seat belts, safety belts, leather belts, shoes, tapes, polymers, spring steel castings, copper tubes, non-ferrous metals, automotive parts, alloy materials and other non-metallic and metallic materials.

2、 Main specifications

A、 High precision force sensor: 10T, force accuracy within ± 0.5%.

B、 Capacity segmentation: Seven levels throughout the process: * 1: * 2: * 5: * 10: * 20: * 50: * 100, using high-precision 24bits A/D, sampling frequency 200HZ

C、 Power system: Wind configuration list

D、 Control system: Pulse Command control mode is adopted to improve control, with a speed control range of 0.1-250mm/min. The intermediate board adjustment has a fast coarse adjustment function. Automatically return to the origin and store after testing.

E、 Data transmission method: RS232 transmission

F、 Display mode: UTM107+WIN-XP test software computer screen display.

G、 A concise linear dual correction system with full range one gear and precise full range seven gear force.

H、 The luxury testing interface software can achieve control modes such as fixed speed, positioning movement, fixed load (with adjustable holding time), fixed load increase rate, fixed stress increase rate, and fixed strain increase rate, along with multiple control modes, to meet different testing requirements.

I、 Testing space: The testing width is about 440mm (standard specification), and the walking space of the connecting plate is 950mm (excluding fixtures) (standard specification)

J、 Full displacement: Encoder 2500P/R, improving accuracy by 4 times, using LINE DRIVE encoder for interference capability, displacement resolution 0.001mm

K、 Safety devices: overload emergency stop device, upper and lower travel limit device, leakage automatic power-off system, automatic breakpoint shutdown function.

L、 Manual control method: Wireless remote control device or manual operation box can be added. (Purchase)

3、 Function Introduction

▲ Automatic shutdown: After the sample is damaged, the moving crossbeam automatically stops moving;

▲ Automatic shifting: Automatically switch to the appropriate range according to the size of the test force to ensure the accuracy of the measurement data;

▲ Condition module: The experimental conditions and sample raw data can be stored in the form of their own standard modules; Convenient for users to call and view, saving experimental time;

▲ Automatic transmission: The displacement speed during the test process can be automatically completed or manually changed;

▲ Automatic saving: At the end of the experiment, the experimental data and curves are automatically saved by the computer to prevent data loss caused by forgetting to save them;

▲ Testing process: The testing process, measurement, display, analysis, etc. are all completed by a microcomputer;

Batch test: For samples with the same parameters, a batch of tests can be completed sequentially after one setting;

▲ Experimental software: Chinese Windows user interface, easy to operate;

▲ Display mode: Data and curves are dynamically displayed during the experimental process;

▲ Curve traversal: After the experiment is completed, the curve can be enlarged and reanalyzed, and the data corresponding to each point on the experimental curve can be found with the mouse;

▲ Test report: can be edited and printed according to user requirements;

▲ Limit protection: It has two levels of limit protection: programmable and mechanical;

▲ Overload protection: When the load exceeds the rated value by 3-5%, it will automatically shut down;

▲ Various experimental results are obtained in both automatic and manual modes, and reports are automatically generated to simplify the data analysis process and facilitate users;

4、 Main purpose:

1. Suitable for tensile, compressive, bending, shear and other tests on metal materials and components, as well as for testing similar non-metallic materials such as plastics, concrete, cement, etc.

2 Special Testing Projects

Coefficient of elasticity, also known as Young's modulus of elasticity

Definition: The ratio of the normal stress component to the normal strain in the same phase. To determine the coefficient of material rigidity, the higher the value, the stronger the material.

Proportional limit: The load can maintain a proportional relationship with elongation within a certain range, and its large stress is

To surpass the limit.

Elastic limit: the large stress that a material can withstand without deformation

Elastic deformation: After removing the load, the deformation of the material disappears.

Elastic deformation: After removing the load, the deformation of the material disappears.

5、 Universal material testing machine meets the requirements

Computer based universal material testing machine "GB/T16491-1996 Electronic universal testing machine" standard GB 8808/GB 13022/GB 1040/GB 4850/GB 7753/GB 7754/GB 453/GB/T 17200/GB/T 16578/GB/T 7122/GB/T 2790/GB/T 2791/GB/T 2792/ASTM E4/ASTM D828/ASTM D882/ASTM D1938/ASTM D3330/ASTM F88/ASTM F904/ISO 37/JIS P8113‖QB/T 2358/QB/T 1130/ Waiting for experimental standards

6、 Verification method for universal material testing machine

According to the force value of the tested section of the testing machine, the corresponding standard tensile test specimen is clamped on the testing machine, and the testing machine is allowed to stretch the standard tensile test specimen at the speed specified in GB/T228-2002 standard. When the standard tensile test specimen is in a stretched state, an extensometer or strain gauge is attached to it, and the tensile testing machine continues to stretch the standard tensile test specimen. The extensometer or strain gauge displays the elongation of the standard tensile test specimen. This method uses Hooke's law to convert the elongation of the standard tensile test specimen into a force value and compare it with the force value of the testing machine dial to determine the accuracy of the testing machine. This method greatly simplifies the verification process and brings great convenience and standardization to the daily verification of the original tensile state of the testing machine.

7、 Test project

（1） Common testing items: (common display values and calculated values)

★ Tensile stress ★ Tensile strength

★ Tensile strength ★ Tensile elongation

★ Constant tensile stress ★ Constant stress elongation rate

★ Fixed stress value ★ Tear strength

★ Force value at any point ★ Elongation at any point

★ Extraction force ★ Adhesive force and peak calculation value

★ Pressure Test ★ Shear Peel Force Test

★ Bending test ★ Pull out force puncture force test

（2） Special testing items:

1. Elastic modulus, also known as Young's modulus of elasticity:

Definition: The ratio of the normal stress component to the normal strain in the same phase. To determine the coefficient of material rigidity, the higher the value, the stronger the material.

2. Proportional limit: The load can maintain a proportional relationship with elongation within a certain range, and its large stress is the proportional limit.

3. Elastic limit: refers to the large stress that a material can withstand without permanent deformation.

4. Elastic deformation: After removing the load, the deformation of the material disappears.

5. Yongjiu deformation: After removing the load, the material still retains deformation.

6. Yield point: When a material is stretched, the deformation increases while the stress remains constant, and this point is called the yield point. The yield point is divided into upper and lower yield points, and generally the upper yield point is taken as the yield point. Yield: When the load exceeds the proportional limit and elongation is no longer proportional, the load will suddenly drop, and then fluctuate up and down over a period of time, causing significant changes in elongation. This phenomenon is called yield.

7. Yield strength: The quotient obtained by dividing the load at which the permanent elongation reaches a certain specified value during stretching by the original cross-sectional area of the parallel part.

8. Spring K value: the ratio of the force component in phase with the deformation to the deformation.

9. Effective elasticity and hysteresis loss: On a universal material testing machine, when the sample is stretched at a certain speed to a certain elongation or to a specified load, the percentage of the work recovered during shrinkage and the work consumed during stretching is measured, which is the effective elasticity; The percentage of the energy lost during the elongation and contraction of a sample compared to the work consumed during elongation is called hysteresis loss.

8、 Select

1. In terms of application scope

Electronic universal testing machine is widely used for testing the tensile performance indicators of various metal, non-metal and composite materials, such as wood, plastic profiles, wires and cables, paper, film, rubber, food packaging materials, fabrics, etc.

At the same time, various experimental data processing software and experimental aids can be customized according to domestic and international standards provided by users. The digital display electronic universal testing machine is suitable for users who only need data related to force values, tensile strength, compressive strength, etc. If complex parameters are required, a microcomputer controlled electronic universal testing machine is a better choice.

2. In terms of cost-effectiveness

The following electronic universal testing machines have more advantages. The hydraulic universal testing machine is mainly used for testing the mechanical properties such as tension, compression, and bending of metal, non-metal materials, parts, and components. Hydraulic universal testing machine is an ideal testing equipment for industrial and mining enterprises, building materials, quality inspection centers, water conservancy and hydropower, bridge engineering, research institutes, and mechanical testing laboratories in colleges and universities.

A manually controlled hydraulic universal testing machine suitable for finished product inspection and material index testing in industrial and mining enterprises; The electro-hydraulic servo universal testing machine is suitable for laboratories, research institutions, and colleges with high requirements for steel and building materials testing.

3. In terms of performance

The electronic universal testing machine does not require an oil source, making it cleaner and easier to use and maintain; Its testing speed range can be adjusted, with a testing speed of up to 500mm and a testing stroke that can be customized as needed, making it more flexible; High force measurement accuracy, some can even achieve it; Small in size, light in weight, large in space, and convenient to add corresponding devices for various material mechanics tests, it can achieve multiple uses for one machine.

4. Hydraulic universal testing machine, limited by the flow rate of the oil source, has a lower testing speed. Manual hydraulic universal testing machine, easy to operate and inexpensive, but with low control accuracy; Compared to the performance portal digital electronic universal testing machine, the electro-hydraulic servo universal testing machine has lower speed and control accuracy; The microcomputer controlled electro-hydraulic servo universal testing machine using load sensors can achieve a force accuracy of about 0.5%, and is more reliable, stable, and cost-effective in material mechanics tests with large tonnage.

5. The electronic universal testing machine mainly uses servo motors as the power source, and screw and nut as the executing components to achieve speed control of the moving crossbeam of the testing machine. In terms of transmission control, there are mainly two forms: synchronous belt and gearbox; Electronic universal testing machines all use load sensors for force measurement.

9、 Testing machine characteristics:

1. Due to the use of imported servo motors, servo speed control systems, and ball screws, the testing machine has smooth transmission, low noise, high speed accuracy, wide speed range, and long service life.

2. Synchronize display of test force, peak value, displacement, velocity, experimental status, and test curve

3. Limit, overload automatic protection, sample fracture automatic shutdown

4. Stability: resistance to fluctuations, zero drift, power supply capability, anti-interference ability, temperature drift, time drift, and moisture resistance.

For universal testing equipment, it covers almost all types of testing applications in various industries, and is therefore also known as "universal". Today, we will briefly introduce several applications: stability: anti fluctuation, zero drift, power supply capability, anti-interference ability, temperature drift, time drift, and moisture resistance. Satisfied the tensile testing of long and full-size specimens. The hydraulic horizontal tensile testing machine is mainly used for tensile performance testing of various metal components, steel cables, chains, anchor chains, lifting belts, cables, separation discs, etc. The main body of the testing machine adopts a steel plate welded frame structure, segmented moving crossbeams to adjust the testing space, single output rod double acting piston cylinder to apply testing force, manual or servo control of the testing process, load sensor force measurement, microcomputer display of testing force and testing curve.

Automotive components:

Rubber products on cars, including floor glue, rubber on electronic components, and key components on rubber products (brake pipes, brake cups, brake pads, seals, etc.). When using a tensile machine in daily life, if you don't know what range to choose, you won't be able to calculate the force value. Below, I will explain how to calculate:

Determine the size of the test piece, including its thickness and width. Measure the cross-sectional area of the test piece: Calculate the cross-sectional area based on the thickness and width of the test piece, usually using the formula 'A=(t * w) ²/2' to calculate the area in the circumferential direction, where't 'is the thickness and' w 'is the width.

Choose appropriate testing standards: Select corresponding testing standards based on different testing requirements, such as tensile strength, adhesive strength, tear strength, etc.

Apply load: In the tensile test, place the specimen on the loading device and apply a predetermined load. Record data: Record the elongation and original length (or clamp spacing) of the sample.

Calculate tension value: Based on the above data, calculate the required tension value using a formula or specific testing software. The unit of the test space is expressed in millimeters (mm). For vertical tensile testing machines, the test space is not very large. Conventional models are 0.6 meters and 1 meter, but for special models such as testing pipes, it can reach up to 3 meters. The testing space of a horizontal tensile machine can also reach several tens of meters, but regardless of how long the testing space is, its unit is usually expressed in millimeters, which is closely related to the unit of testing speed of the testing machine.

The specific calculation formula may vary due to different testing standards. For example, for the calculation of tensile strength, the formula 'σ=F/A' can be used, where 'σ' is stress, 'F' is load, and 'A' is cross-sectional area. For adhesive strength and tear strength, it may be necessary to calculate the peel force and large load separately, and then divide them by the width or thickness of the test piece.

The units of force mainly include cattle (N), kilonewtons (KN), kilograms, kilograms (KG), pounds (LB), tons, etc. In the application of daily testing machines, there are mainly cattle, kilonewtons, kilograms (kg), tons, etc. The conversion between them is mainly divided into two types of Newton conversion. The conversion relationship between kilograms and Newton is as follows:

1: 1KN=1000N=1T

2: 1kg=9.8N (For the convenience of calculation, the calculation method of 1kg=10N is often used in use)

Plastic:

Testing of mechanical properties such as tensile modulus of elasticity, flexural modulus of elasticity, compressive modulus, yield strength, tensile strength, fracture strength, elongation at break, compressive stress, compressive strain, shear, peel, brace, tear, penetration, etc. for various thermosetting and thermoplastic plastics. The main industries for material analysis and inspection include engineering plastics, reinforced nylon, modified plastics, plastic profiles, plastic pipes, plastic sheets, and films.

Construction steel:

Steel bars (steel plates), steel pipes, cast iron pipes, steel bar connection joints, welds and deposited metals, aluminum alloy types, carbon structural steel, elongation testing of low-carbon steel hot-rolled disc bars yield strength, elongation testing of steel wires for prestressed concrete, elongation testing of steel strands for prestressed concrete, and welding of steel bars with maximum elongation under high force.

In addition, there are some special testing items: elasticity coefficient, limit of elasticity, elasticity limit, elastic deformation, permanent deformation, yield point, yield strength, tension spring K value, useful elasticity and hysteresis loss, etc. According to the different fixtures, the testing items are also different. One versatile tool truly achieves universal material testing.

History of Universal Material Testing Machine

The universal material testing machine in our country was developed by Professor Deng Yuemo. The modern machinery industry in China, which emerged during the Opium War, has had the characteristics of semi colonial and semi feudal from the beginning. The enterprises founded by Chinese national capital have always been under heavy pressure from the feudal and bureaucratic compradors, and their situation has been very difficult. Until the first half of the 20th century, China's machinery industry was still extremely backward, with the main machinery and equipment relying on imports, and the design and manufacturing of mechanical products mostly controlled by foreigners. Deng Yuemo began his exploration and struggle in the field of mechanical engineering under such historical conditions.

In 1930, Deng Yuemo was appointed as a professor at Beiyang University. According to the national regulations in Nanjing, all engineering colleges must establish laboratories. But at that time, almost all teaching experimental instruments and equipment were imported and expensive, such as a 50000 pound material testing machine that cost more than $15000, and funding for schools was extremely limited. To overcome this difficulty, Deng Yuemo made up his mind to design and manufacture it himself. From 1932 to 1933, Deng Yuemo, relying on the Mechanical Research Society, successfully designed and manufactured a series of instruments and equipment for material testing laboratories and hydraulic laboratories through a series of arduous experiments, such as hydraulic testing machines, impact testing machines, cement tensile machines, flow meters, mixed flow water pumps, two-stage water pumps, water turbines, etc. In addition to equipping the material testing laboratory and hydraulic laboratory of Beiyang University, they were also supplied to relevant laboratories of Shandong University, Sun Yat sen University, Henan University, Chongqing University, Jiaozuo Institute of Technology, Henan Water Conservancy Specialized School, and many other universities across the country. The 50000 pound material testing machine was a universal material testing machine designed and manufactured by Chinese people at that time, which could conduct a series of static tests on the mechanical properties of materials.

Resin film tensile testing machineAutomotive components:

Rubber products on automobiles, including floor glue, rubber on electronic components, and key components on rubber products such as brake pipes, brake pads, seals, etc

Plastic:

Testing of mechanical properties such as tensile modulus of elasticity, flexural modulus of elasticity, compressive modulus, yield strength, tensile strength, fracture strength, elongation at break, compressive stress, compressive strain, shear, peel, brace, tear, penetration, etc. for various thermosetting and thermoplastic plastics. The main industries for material analysis and inspection include engineering plastics, reinforced nylon, modified plastics, plastic profiles, plastic pipes, plastic sheets, and films.

Construction steel:

Steel bars (steel plates), steel pipes, cast iron pipes, steel bar connection joints, welds and deposited metals, aluminum alloy types, carbon structural steel, elongation testing of low-carbon steel hot-rolled disc bars yield strength, elongation testing of steel wires for prestressed concrete, elongation testing of steel strands for prestressed concrete, and welding of steel bars with maximum elongation under high force.