Adhesive adhesion test method introduction

Adhesive adhesion test method introduction

As a traditional dosage form in traditional Chinese medicine preparations, plaster (sticking agent) plays an important role in the medical field. It has a wide range of applications in the medical fields such as rheumatism, pain relief, elimination, and siltation. Plaster (sticking agent) is extremely easy to use, but the size of its adhesion (adhesive strength) plays an important role for consumers. For this reason, the National Pharmacopoeia tests the adhesion (adhesion) of plasters (stickers). The detailed regulations; the Pharmacopoeia stipulates that the adhesion (adhesion) of the plaster (adhesive) mainly includes three indicators: initial adhesion (initial adhesion), holding strength (stickiness) and peel strength.
Jinan Sanquan Zhongshi Experimental Instrument Co., Ltd. is an excellent provider of testing instruments and inspection services. For many years, it has continued to be medical, medical, food, daily, packaging, printing, adhesive, automotive, petrochemical, environmental, biological, new energy, construction, aviation. And the electronics industry provides customers with the best and most comprehensive quality control solutions. In order to facilitate the major plaster (sticker) manufacturers to better understand the "measurement method of paste adhesion", the pharmacopoeia regulations and testing instruments are combined to introduce the testing items and test methods.
1. Determination of initial adhesion of plaster (sticker) (initial viscosity measurement)
Take the CNY-1 initial viscosity tester produced by Sanquan Zhongshi as an example. The test principle is measured by inclined ball. The plaster initial adhesion test device is mainly composed of a slanting plate, a base, a stainless steel ball and a ball receiving box. First, adjust the inclined plate of the initial tack tester to 30 degrees from the horizontal plane, fix the adhesive side of the plaster (sticker) sample to the inclined plate of the initial tack tester, and place a stainless steel ball on the inclined plate. The steel ball is placed in the area and adjusted to the initial position, and the steel ball is released. The steel ball is rolled and passed through the viscous surface, and the initial viscosity is evaluated according to the largest ball steel ball which can be adhered to the adhesive surface of the plaster.

Initial tack tester CNY-1

√Application range

It is mainly used for the initial tack test of adhesive tapes, labels, medical tapes, protective films, plasters and other products.

How does it work?

The initial viscosity of the sample was tested by the effect of the adhesion of the product to the steel ball by the inclined ball rolling method, when the steel ball and the adhesive surface of the test sample were briefly contacted by a slight pressure.

√Technical parameters

1. Adjustable tilt angle: 0~60°

2. Countertop width: 120mm

3. Test area width: 80mm

4. Standard steel ball: 1/32 inch to 1 inch

5. Dimensions: 320mm × 140mm × 180mm

6. Weight: 6kg

√ configuration

Standard configuration: a box of mainframes and steel balls.

Optional configuration: steel ball

√ keyword

GB/T4852, initial adhesion tester, initial adhesion tester, beveled ball method II. Determination of adhesion (stickiness) of plaster (sticker)

Take the CNY-2 holding viscous tester and the YGJ-G adhesive tape press machine produced by Sanquan Zhongshi as an example. The test device consists of a viscous tester (including test frame, test plate, returning plate), and adhesive tape pressure. The roller machine consists of two parts. The viscous surface (adhesive surface) of the sample is attached to the surface of the test plate and the loading plate, and is rolled back and forth three times using an adhesive belt press roll machine. After being placed for 5 minutes, the sample is placed vertically on the test frame, along the sample. A weight of a specified mass is suspended in the longitudinal direction, and the time during which the sample slips until it falls off is recorded.

Sticky tester CNY-2

√Application range

It is suitable for the adhesive test of various adhesive tapes, adhesives, medical tapes, sealing tapes, labels, plasters and other products.

How does it work?

The test plate with the sample attached is vertically hung on the test frame, and the weight of the specified weight is suspended at the lower end, and the displacement of the sample after a certain time is removed, or the time when the sample is completely detached is used to characterize the adhesive tape. Ability to take off.

√Technical characteristics

1. Using a single chip timer

2. LCD liquid crystal display test time

√Technical parameters

1. Standard pressure roller: 2000g ± 50 g

2. Weight: 1000± 10g (including loading plate weight)

3. Test plate: 60 (L) mm × 40 (B) mm × 1.5 (D) mm

4. Timing range: 0~100h

5. Number of stations: 6 pieces (optional)

6. Dimensions: 600mm × 300mm × 400mm

7. Net weight: 20kg

8. Power: 220V 50Hz

√ configuration

Standard configuration: main machine, standard pressure roller, test board, power cord, fuse

Optional configuration: standard pressure roller, test plate

√ keyword

GB/T4851, viscous tester, tape retention tester, six-station sticky tester 3. Plaster (paste) peel strength measurement)
Determined by the 180° peel strength test according to the Pharmacopoeia. Take the BLG-100 electronic peeling test machine of Sanquan Zhongshi as an example. The test process is as follows:
The plaster (sticker) backing was first fixed to the test panel with double-sided tape. If necessary, use tape to fix the edges of the upper and lower sides of the sample so that the sample fits flat on the plate. A clean polyester film was placed flat on the viscous side of the sample, and a 2000 g weight roller was used to roll 3 on the prepared sample to ensure that no bubbles were present at the bond. After the test article is pasted, it should be placed for 20~40 minutes before testing.
The free end of the polyester film was folded in half (180°), and the free end of the film and the test plate were respectively clamped up and down on the testing machine. Be sure to keep the peeling surface in line with the test machine line, set the test speed to 300mm/min±10mm/min, start the test, and calculate the peel strength. The general unit is KN/m or N/mm.
The above is a brief introduction to the method for detecting the adhesion of plasters (stickers). Sanquan Zhongshi and plaster manufacturers conduct all-round communication on the detection and quality of their adhesion.
The above information was provided by Sheng Yongfang, Jinan Sanquan Zhongshi Experimental Instrument Co., Ltd.

Electronic peeling test machine BLJ-100

√Application range

Suitable for all kinds of composite film, adhesive, tape, release paper, paper, rubber, plastic, textile, waterproof material, non-woven fabric, wire, metal foil, metal sheet peeling, stretching, tearing, Performance test such as heat seal strength.

√Technical characteristics

Single arm structure

2. Can be shut down and peaked

3. Can measure peeling, heat sealing, stretching and other items

4. The tensile force value can be determined, and the constant force value can be measured to indicate the curve (force value, displacement).

5. Single point speed regulation can also be stepless speed regulation (1— 500mm /min)

6. Can be divided into four files, each measurement accuracy ± 1%

7. Closed-loop control with high control accuracy

√Technical parameters

1. Test force: 30N, 50N, 100 N, 300 N, 500N, 1000 N, etc. (optional)

2. Stretch space: 450mm

3. Load measurement range: 2% - 100% of the maximum load

4. Load measurement accuracy: + 1%

5. Force measurement bin: 1, 2, 5, 10 four-level bin

6. Displacement speed: 1, 2, 5, 10, 20, 50, 100, 200 (500) mm / min can be arbitrarily selected, stepless speed regulation

7. Speed ​​accuracy: ±2%

8. Dimensions: 1350mm × 450mm × 260mm

9. Power: 220V±10%V

√ configuration

Standard configuration: main unit, standard fixture set, one micro printer, peel test board, standard pressure roller

Optional configuration: peel test board, standard pressure roller

√ keyword

GB/T8808, electronic stripping machine, peeling test machine, tensile machine

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