Abstract: The bottle cap locking and opening torque values ​​of bottled cosmetics and other container products are one of the process parameters that the production unit controls offline or on-line. Whether the torque value is appropriate or not has a great influence on the intermediate transportation of the product and the final consumption. This article describes in detail the Labthink blue light NJY-20 torque meter bottle test cosmetic cap open torque value of the test process and the principle of the cosmetics industry to provide examples of production quality control process reference.
Keywords: bottled cosmetics, nozzle packaging products, hose packaging products, bottle mouth, opening torque, easy to open, leak, torque meter
1, the meaning
People apply cosmetics to human skin or facial features, such as cleansing, beautification, care, maintenance, and modification by applying, spraying, and sprinkling. According to the type can be divided into liquid, lotion, cream, powder, block, oil like these types. Liquid and emulsion cosmetics packaging can be roughly divided into bottles, hoses and bags. Bottled cosmetics are divided into plastic bottles and glass bottles. Bottles are divided into rotary, push-type and press-type bottles. Rotary bottles The mouth is often packaged with a screw cap, and it is necessary to perform twisting and screwing before use. If the screw cap is too tight, it is inconvenient for the consumer to open. If the screw cap is loosened, the quality problem of the bottle mouth leakage may occur.
How to solve the problem that similar screw cap bottled cosmetics can meet the requirements of the screw cap on the basis of the consumer can withstand, to achieve easy opening and sealing well, need to use effective monitoring means to verify. For screw cap bottled cosmetics, this article uses the NJY-20 torque meter independently developed by Jinan Languang Electromechanical Technology Co., Ltd. to test the torque value of the sample. The torque is used to determine whether the cosmetic product is easy to open and less likely to leak, providing a technical reference for the cosmetics industry. .
2, the status quo
At present, the domestic test cap open torque performance mainly refers to the “opening torque test†method in GB/T 17876-2010 "Packing Containers Plastic Anti-theft Bottle Cap". This standard is suitable for polyolefins as the main raw material, injection molding, heat After pressing or other process forming caps, the caps can not be restored to their original packaging after being opened and sealed.
3, sample
A brand of moisturizer packed in plastic bottles with plastic anti-theft caps.
4, testing equipment
This article uses the Labthink blue light NJY-20 torque meter to perform the torque test when opening the bottle cap.
Figure 2 NJY-20 Torque Meter
4.1 Test principle
Using a torsion angle phase difference sensor, a strain bridge detection method is adopted to realize the monitoring of the electrical signal of the torsion of the elastic shaft during testing of the sample, thereby testing the opening torque value of the cap or the size of the locking value.
4.2 Application
(1) This equipment is professionally used for bottle lock and opening torque test of cosmetics, foods and medicines (threaded connections) in bottle packaging and hose packaging. Such as hand cream, beverage bottles, medicine bottles. In addition, it can be used to test the tightening and opening torque values ​​of bottle caps, nuts and bolts used in thermos flasks and thermos cups (threaded connections).
(2) The equipment meets a number of national and international standards: GB/T 17876, ASTM D2063, ASTM D3198, ASTM D3474, BB/T 0025, BB/T 0034.
4.1 Equipment Parameters
Torque specifications are 20 Nm, 40 Nm, and 50 Nm. The accuracy is Class 1 and the system resolution is 0.001 Nm. Gripping range 5 mm to 170 mm (diameter). Provides dual test modes of opening force and locking force. The measurement peak is automatically maintained to ensure that the test results are accurately recorded. Overload protection, auto-zero, and fault indications are intelligently configured to ensure the safety of the user's operations. The system adopts microcomputer control, with LCD liquid crystal display screen and PVC operation panel to facilitate users to quickly and intuitively check the detection data and results. Supports LystemTM laboratory data sharing system, unified management of test reports and test results.5, the test process
(1) In a laboratory standard environment, place a sample of the cosmetic bottle in a well-conditioned state on the instrument holder and clamp it tightly.
(2) Set the instrument mode to "Turn on torque" and click to start the test.
(3) Put your hand on the bottle cap and unscrew the cap. At this time, the instrument will automatically detect the open torque value.
(4) According to the above steps, test the remaining 2 samples in turn.
Figure 3 Test process
6, test results
The opening torque values ​​of the tested plastic bottle packaging cosmetic caps were 0.405 Nm, 0.421 Nm, and 0.417 Nm, respectively.
7. Conclusion
The size of the cap locking and opening torque of bottled packaging products, suction packaging products, and hose packaging products is one of the process parameters that the production unit controls offline or on-line. This article uses the NJY-20 torque meter to test the opening torque of the cosmetic plastic bottle cap, has the advantages of high measurement accuracy, good stability, can ensure that bottled cosmetics are easy to open and have a good seal. In addition to testing equipment that tests the bottle opening torque and other properties, Labthink also provides global customers with professional testing services and equipment such as bottle container barrier. Learn more about Labthink's testing equipment and services. Log Labthink website or call the specific information of other devices. Jinan Languang Electromechanical Technology Co., Ltd. is willing to take this opportunity to increase technical exchanges and cooperation with enterprises and institutions in the industry.
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