CN114878446A

CN114878446A - Detection method for anti-tack performance of water-based gloss oil

Info

Publication number: CN114878446A
Application number: CN202210468835.4A
Authority: CN
Inventors: 闫继芳; 徐天平; 杨晓; 王银磊
Original assignee: Beijing Jinyinlian International Supply Chain Management Co ltd
Current assignee: Beijing Jinyinlian International Supply Chain Management Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-09

Abstract

The application specifically discloses a detection method for the anti-sticking performance of aqueous gloss oil. A method for detecting the anti-tack performance of aqueous gloss oil comprises the following steps: s1, cutting the printing sample; s2, horizontally placing the glass plate, and placing the first gloss oil face upwards above the glass plate; s3, dripping water on the gloss oil surface of the first specimen, and then taking a second specimen to place the gloss oil surface downwards above the first specimen; subsequently covering another glass plate above the second proof sheet; s4, pressing a weight on the uppermost glass plate; and S5, drying at the drying temperature of 50-70 ℃ for 40-80min, S6, after drying, uncovering the first sample sheet and the second sample sheet, checking the gloss oil surface state of the sample sheets, and judging the anti-after-tack performance of the gloss oil. The detection method has the advantage of short detection time.

Description

Detection method for anti-back-tack performance of water-based gloss oil

Technical Field

The application relates to the field of printing and packaging, in particular to a detection method for the anti-sticking performance of water-based gloss oil.

Background

In the production process of printed matter, generally can print one deck gloss oil on the printing ink layer after printing ink printing, can play the effect that blocks water, dampproofing, improve the wear resistance of printing ink, can also protect and decorate the printed matter, promote product quality.

The printing product often can take place the adhesion phenomenon in transportation, storage or circulation link, and light person's printed matter surface is stained, and heavy person's paper breaks, and can pollute the product protected still, can not play the function of protection and transmission information, so before research and development waterborne gloss oil or waterborne gloss oil printing, should detect the adhesion performance of waterborne gloss oil, avoid causing heavy loss behind the finished product.

The adhesion phenomenon mainly comprises adhesion between the gloss oil surface of a product and the gloss oil surface of another product and adhesion between the gloss oil surface of the product and the back surface of another product, and because scenes and contact environments in which the two adhesion modes occur are different, the detection modes of the two products are also obviously different.

The adhesion between the gloss oil surface and the gloss oil surface is also called the re-adhesion of the water-based gloss oil, mainly because the main components of the water-based gloss oil, such as acrylic resin, emulsifier and the like, have certain hydrophilicity, the gloss oil absorbs water and gets damp and soft in the storage process and is adhered to adjacent printed matters, and when the two products are mutually peeled, the printed information is easily lost and paper is easily broken.

The existing detection means mostly adopt a pressing mode in a high-temperature environment, for example, the pressing is carried out for 48 hours, 72 hours or 7 days at a certain temperature, and the detection time is longer. Is not beneficial to the quick circulation of the product and influences the production efficiency.

Disclosure of Invention

In order to conveniently and rapidly detect the anti-sticking performance of the water-based gloss oil, the application provides a detection method for the anti-sticking performance of the water-based gloss oil.

The application provides a detection method for the anti-sticking back performance of water-based gloss oil, which adopts the following technical scheme:

a method for detecting the anti-tack performance of aqueous gloss oil comprises the following steps:

s1, cutting the printing sample, and cutting the printing sample into two sample sheets with the same size, namely a first sample sheet and a second sample sheet;

s2, horizontally placing the glass plate in an oven, and placing the first gloss oil face upwards above the glass plate;

s3, dripping water on the gloss oil surface of the first sample sheet, and then taking a second sample sheet to enable the gloss oil surface to be placed above the first sample sheet downwards; subsequently covering another glass plate above the second proof;

s4, pressing a weight on the uppermost glass plate;

s5, drying at 50-70 deg.C for 40-80min,

and S6, after drying, uncovering the first sample sheet and the second sample sheet, checking the gloss oil surface state of the sample sheets, and evaluating the anti-sticking performance of the water-based gloss oil.

The shape of the sample sheet can be a regular geometric figure or an irregular geometric figure, and preferably, the sample sheet can be in the shape of a circle, a rectangle, a square and the like;

more preferably, the proof size is a rectangle of (10-14) cm x (10-14) cm;

most preferably, the proof size is a square of 12cm by 12 cm.

Preferably, the amount of the water dropping in the step S3 is 40-100 cm ² 0.1ml of specimen area is dripped

Preferably, the amount of the water dropping in the step S3 is per (60-80) cm ² 0.1ml of sample area is dripped;

more preferably, the amount of the water dropping in the step S3 is used per (65-75) cm ² 0.1ml of the swatch area was added dropwise.

In one embodiment of the present application, 0.15ml of water may be dropped in the center of a 12cm × 12cm format specimen.

In one embodiment of the present application, 0.2ml of water may be dropped in the center of a 12cm × 12cm format specimen.

In one embodiment of the present application, 0.25ml of water may be dropped into the center of a 12cm x 12cm format specimen.

The purpose of the water dropping in the step of S3 is to expose the defect of the gloss oil layer of the proof sheet more quickly when the proof sheet is detected in a high-temperature and high-humidity environment. Thereby greatly shortening the detection time. When the sample sheets pass the detection under the environment of high temperature and high humidity, and the gloss oil layers of the two sample sheets do not stick back, the sample sheets can be stored for a long time under the normal storage environment.

The amount of water used in S3 has an influence on the detection result, and when the amount of water used is too large or too small, the detection result is biased.

When the water consumption is too low, the following may occur to cause deviation in experimental results, and in particular, may result: when the two sample sheets are pressed together by a heavy object, water drops are distributed at each position of the sample sheets in a dispersed manner, and a continuous wetting environment cannot be formed, so that the randomness of a detection result is high, and the detection accuracy is influenced; or moisture between the samples is quickly lost, so that the high-temperature and high-humidity environment between the samples cannot be maintained, and the detection accuracy is further influenced; or the humidity and the temperature between the samples are in a lower state, so that the detection time of the samples can be greatly prolonged.

Too much water in S3 also affects the efficiency and accuracy of the detection. In particular, may lead to extended detection times; when the water consumption is too much, the water is possibly extruded out of the edge of the sample sheet along with the extrusion of the heavy object, so that the water can be invaded into the sample sheet through the side wall or the back surface of the sample sheet, the substrate structure of the sample sheet is easy to damage, and the detection accuracy of the anti-after-tack performance of the water-based gloss oil is influenced.

For example, after 0.3ml of water is dropped into the center of a specimen of 12cm × 12cm specification and pressed and dried, it is found that moisture penetrates into the base material through the back surface of the specimen, and the specimen is broken, and the detection result cannot be shown.

Controlling the amount of water dropping in the step S3 to be every (60-80) cm ² 0.1ml of the swatch area was added dropwise. The detection rate can be improved on the premise of ensuring the detection accuracy.

Preferably, in one embodiment of the present application, the swatch may be a 12cm x 12cm square, and the amount of water drop is 0.2ml per swatch.

The drying temperature is represented by t, and the water dropping amount is represented by v;

when v is more than or equal to 0.15 and less than 0.2, t is more than or equal to 50 and less than 60;

optionally, when v is more than or equal to 0.2 and less than or equal to 0.25, t is more than or equal to 60 and less than or equal to 70.

Preferably, the drying temperature is 50-65 ℃.

More preferably, the drying temperature is 55-65 ℃.

In several embodiments of the present application, the drying temperature may be 50 ℃, 60 ℃, 70 ℃.

Preferably, the drying temperature may be 60 ℃.

Researches show that the drying temperature and the dosage of specimen drop water jointly influence the time consumption and the detection accuracy of detection

When the amount of the dripping water is constant, the drying temperature rises within a reasonable range to shorten the detection time, and if the drying temperature is too high, the detection accuracy is affected, and an expected detection result cannot be obtained after the sample sheet is uncovered.

If the amount of the dripping water is 0.15ml, the drying temperature is not more than 50 ℃,

when the amount of dripping water is 0.2ml, the drying temperature should not exceed 70 ℃,

when the amount of the dripping water is 0.25ml, the drying temperature should not exceed 75 ℃.

Similarly, when the drying temperature is constant, the more the amount of the dropping water is, the longer the time required for the detection is. In order to maintain a high humidity environment between the patterns, the amount of dripping water should not be too small, but too small (especially, the amount of dripping water is less than 0.1ml/144 cm) ² ) It is difficult to maintain a high humidity environment between the patterns, thereby affecting the accuracy of the detection.

Preferably, the weight amount is 0.8-1.5 kg.

The pressure intensity between the two sample sheets can be changed by adjusting the mass of the weight, so that the attaching tightness of the two sample sheets is adjusted. When the pressure is too low, the sample sheets are not tightly attached, and water is quickly evaporated, so that the detection result of the anti-rebound viscosity performance of the sample sheets is influenced; on the other hand, if the amount of the heavy material is too high, the two samples are bonded too tightly, so that the water storage amount between the samples is reduced, and the water cannot be continuously distributed in a sheet shape between the samples. On the other hand two kinds are posted and are closed too tightly and also can make between the sample to close with the passageway of external intercommunication, and the moisture between the sample is difficult to volatilize to the external world, influences the accuracy of testing result.

Preferably, the sample is dried for more than 12 hours after being oiled.

After the sample sheet is subjected to oil for 12 hours, the gloss oil layer on the surface of the printing ink is completely dried, the structure of the gloss oil layer on the surface of the sample sheet is stable, and the anti-sticky performance of the sample sheet cannot be obviously changed along with the prolonging of the storage time, so that the anti-sticky performance of the gloss oil can be evaluated only by detecting the sample sheet which is dried for more than 12 hours after the oil is subjected to oil.

The detection method of the anti-sticking back performance of the water-based varnish comprises the following steps:

s1, cutting the printing sample into two sample sheets of 12cm multiplied by 12cm, namely a first sample sheet and a second sample sheet respectively;

s3, dripping 0.15-0.25ml of water on the gloss oil surface of the first sample sheet, and then taking the second sample sheet to enable the gloss oil surface to be placed above the first sample sheet downwards; subsequently covering another glass plate above the second proof;

s4, pressing a weight on the uppermost glass plate;

s5, drying at 50-70 ℃ for 60min,

In summary, the present application has the following beneficial effects:

1. because this application is through dripping between the gloss oil face of two paper patterns to with the gloss oil face of two paper patterns in opposite laminating together, place two paper patterns under the environment of 50-70 ℃ after the pressurization, thereby the gloss oil face of paper pattern is heated the back, is in the environment of high temperature and high humidity, and then can accelerate detection rate, shortens check-out time.

2. The preferable quantity of dripping and stoving temperature through the adjustment in this application, further shorten check-out time, improved the accuracy that detects simultaneously.

Drawings

Fig. 1 shows the gloss oil level state of the sample sheet with the score of 5, 2 sample sheets in the graph can be directly slid open, the surface of the sample sheet is not damaged, and the anti-after-tack performance is optimal.

Fig. 2 shows the gloss oil level status of the sample sheet with a score of 4, wherein 2 sample sheets in the graph can be uncovered, the sample sheets are only adsorbed together, the surface is not damaged, and the anti-after-tack performance is better.

Fig. 3 shows a state of gloss oil level of 3-point sheet, 2 sheets of the sheet can be peeled off, but the surface has sporadic sticky flower, only the gloss oil layer is slightly damaged, and the sheet in the state needs to be observed under certain light, and the anti-adhesion performance is moderate.

Fig. 4 is a sample gloss oil level state with a score of 2, 2 samples in the graph have large-area sticking patterns on the surface or have sporadic ink on the surface which is stuck to the sample on the opposite side, and the surface is obviously damaged under normal observation conditions, and the anti-after-tack performance is unqualified.

FIG. 5 shows the gloss oil level of 2-point sample, and after 2 sample sheets are uncovered, the paper is broken and the anti-tack property is not satisfactory.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples.

The specification of the sample sheet and the corresponding water-based gloss oil used in the embodiments of the present application are as follows

Printing sample 1: is printed matter dried for 12 hr after being treated with gloss oil of type ATP966

Print sample 2: the printed matter was dried for 12 hours after being treated with gloss oil of SPC1300R

Print sample 3: is a printed matter which is dried for 12 hours after being treated by using gloss oil with the model AW680

The method for detecting the anti-sticking back performance of the water-based gloss oil comprises the following steps:

s4, pressing a weight on the uppermost glass plate;

s5, starting an oven, drying for 40-80min at the temperature of 50-70 ℃,

The method for detecting the anti-sticking performance of the aqueous gloss oil in the prior art comprises the following steps:

the two sample sheets are horizontally stacked with gloss oil surfaces facing each other, a glass plate is covered above the two sample sheets, a weight of 1kg is placed on the glass plate, the two sample sheets are pressed for 7 days, then the glass plate is opened, the two sample sheets are uncovered, and the surface state of the gloss oil is checked.

Inspection of print samples 1

Example 1

A method for detecting the anti-sticking back performance of water-based gloss oil comprises

S1, cutting the printing sample 1 into two sample sheets of 12cm multiplied by 12cm, namely a first sample sheet and a second sample sheet respectively;

s3, 0.2ml of water is dripped on the gloss oil surface of the first sample, and then the second sample is taken to place the gloss oil surface downwards above the first sample; subsequently covering another glass plate above the second proof;

s4, pressing a weight on the uppermost glass plate, wherein the weight is 1 kg;

s5, starting the oven, drying for 40min at the temperature of 60 ℃,

Example 2

The difference from the embodiment 1 is that the drying time in the step S5 in this embodiment is 60 min.

Example 3

The difference from embodiment 1 is that the drying time in step S5 in this embodiment is 80 min.

Comparative example 1

This comparative example used the above-mentioned prior art method for testing the anti-tack properties of an aqueous gloss oil, comprising the steps of:

the two samples are horizontally stacked with the gloss oil surfaces facing each other, a glass plate is covered above the two samples, a weight of 1kg is placed on the glass plate, the two samples are pressed for 7 days, then the glass plate is opened, the two samples are uncovered, and the surface state of the gloss oil is checked.

Inspection of print samples 2

Example 4

S1, cutting the printing sample 2 into two samples of 12cm multiplied by 12cm, namely a first sample and a second sample;

s4, pressing a weight on the uppermost glass plate, wherein the weight is 1 kg;

s5, starting the oven, drying for 40min at the temperature of 60 ℃,

Example 5

The difference from embodiment 4 is that the drying time in step S5 in this embodiment is 60 min.

Example 6

The difference from embodiment 4 is that the drying time in step S5 in this embodiment is 80 min.

Comparative example 2

Detection of print 3

Example 7

S1, cutting the printing sample 3 into two samples of 12cm multiplied by 12cm, namely a first sample and a second sample;

s3, 0.2ml of water is dripped on the gloss oil surface of the first specimen, and then the second specimen is taken to place the gloss oil surface downwards above the first specimen; subsequently covering another glass plate above the second proof;

s4, pressing a weight on the uppermost glass plate, wherein the weight is 1 kg;

s5, starting the oven, drying for 40min at the temperature of 60 ℃,

Example 8

The difference from embodiment 7 is that the drying time in the step S5 in this embodiment is 60 min.

Example 9

The difference from embodiment 7 is that the drying time in step S5 in this embodiment is 80 min.

Comparative example 3

and horizontally stacking the two sample sheets with the gloss oil surfaces opposite to each other, covering a glass plate above the two sample sheets, placing a weight of 1kg on the glass plate, pressing the two sample sheets for 7 days, then opening the glass plate, uncovering the two sample sheets, and checking the surface state of the gloss oil.

EXAMPLES 1-9 TEST OF THE REVERSION PROPERTIES OF COMPARATIVE EXAMPLES 1-3

Detecting the dried sample

1. 2 sample sheets can be directly slid open, the surface of the sample sheet is not damaged, the anti-after-tack performance is optimal, and the score is given for 5;

2. 2 sample sheets can be uncovered, the sample sheets are only adsorbed together, the surface is not damaged, the anti-after-tack performance is better, and the score is given for 4;

3. the 2 pieces of sample sheets can be uncovered, but the surface has scattered sticky flowers, only the gloss oil layer is slightly damaged, the sample sheets in the state need to be observed under certain light, the anti-adhesion performance is moderate, and the rating is given to 3 points

4. Uncovering 2 sample sheets, sticking a large area of patterns on the surface of the sample sheet or sticking scattered ink on the surface of the sample sheet to the opposite sample sheet, obviously showing that the surface is damaged under normal observation conditions, and giving a score of 2, wherein the anti-sticking performance is unqualified;

5. and (4) uncovering 2 sample sheets, wherein the paper sheets are broken by adhesion, seriously adhered and unqualified in anti-sticking performance, and the score is given for 1.

Note that the above uncovering means: the worker pinches the sample sheet from the corners of the sample sheet and separates the two sample sheets at a speed of 1-3 cm/s.

The sticking flower means that the surface of the gloss oil layer is damaged, and under certain light, the surface has traces after the sticking position is separated.

Adhesion Performance scores for examples 1-9 and comparative examples 1-3 are shown in Table 1

TABLE 1

Group of	Scoring	Group of	Scoring	Group of	Scoring
						Example 1	4	Example 4	5	Example 7	1
Example 2	4	Example 5	4	Example 8	2
						Example 3	4	Example 6	4	Example 9	2
Comparative example 1	4	Comparative example 2	4	Comparative example 3	2

By table 1, combine examples 1-3 with comparative example 1; examples 4-6 and comparative example 2; examples 7 to 9 and comparative example 3, examples 1 to 9 of the present application were significantly shorter in the test than comparative examples 1 to 3, and the test results obtained in examples 1 to 3 of the present application were the same as in comparative example 1, the test results in examples 4 to 6 were similar to those in comparative example 2, and the test results in examples 7 to 9 were similar to those in comparative example 3. Therefore, the detection method can be used for detecting the anti-after-tack performance of the water-based gloss oil, the actual coincidence degree of the detection results is good, and the detection time is obviously shortened. And thus can be used for rapid inspection of the finished product. Particularly, when the detection time is 60min, the degree of coincidence between the gloss oil level state of the paper pattern and the actual state is higher, and the detection result is more accurate.

The influence of the drying temperature and the dripping amount between the sample sheets on the detection time and the detection accuracy is as follows:

examples 10 to 14 and comparative examples 4 to 6 were conducted using the same print 1 as in example 2, except that the amount of dripping water was different in the step of S3; and step S5, the drying temperature is different.

The amounts of soil water and drying temperatures of examples 10 to 14 and comparative examples 4 to 6 are shown in Table 2

TABLE 2

Group of	Amount of dripping water	Drying temperature
			Example 10	0.15	50
Example 11	0.15	60
			Example 12	0.2	50
Example 13	0.2	70
			Example 14	0.25	70
Comparative example 4	0.15	40
			Comparative example 5	0.25	75
Comparative example 6	0.2	25

Influence of drying temperature and dripping amount between paper patterns on detection time and detection accuracy

Experimental methods

12 sets of detection models are manufactured, each set of detection models simultaneously comprises the detection paper samples of the examples 10-14 and the comparative examples 4-6, the 12 sets of detection models are simultaneously placed in an oven, one set of detection models are taken out at intervals, the gloss and oil level state of the paper sample is detected, and the gloss and oil level state of the paper sample is compared with the gloss and oil level state of the comparative example 1.

The drying times for the 12 models are as follows:

TABLE 3

Group of	1	2	3	4	5	6	7	8	9	10	11	12
													Drying time/min	30	35	40	45	50	55	60	65	70	1440	2880	4320

The shortest drying time of examples 10 to 14 and comparative examples 4 to 6 was examined.

The minimum drying time refers to the minimum time t/min for the gloss oil surface to achieve the surface effect of the comparative example 1 after the paper pattern is uncovered.

The results of the measurements are shown in Table 4

TABLE 4

Group of	Minimum time t/min	Group of	Minimum time t/min
				Example 10	55	Example 14	60
Example 11	/	Comparative example 4	＞1440
				Example 12	65	Comparative example 5	/
Example 13	/	Comparative example 6	＞4320

Note: the effect of the surface of comparative example 1 was not achieved.

In combination with table 3, it can be seen that both the drying temperature and the water consumption contribute to shortening the detection time, and in general cognition, the drying temperature is increased and the water consumption is reduced, so that the detection time can be shortened.

However, the drying temperature and the water consumption have a correlation, and in examples 11, 13 and 5, although the temperature is increased, the water consumption is low, so that the moisture between the samples is rapidly evaporated, and the high-humidity environment between the samples is difficult to maintain, so that even if the drying time is prolonged, the surface condition of the gloss oil obtained in comparative example 1 cannot be achieved in examples 11, 13 and 5, and therefore the detection accuracy of examples 11 and 13 and 5 is not high, so that the detection accuracy is considered to be affected when the water consumption is low and the temperature is too high. When the temperature is higher than 75 ℃, for example, the temperature is raised to 80 ℃ and 90 ℃, the excessive temperature easily causes the surface of the gloss oil to generate thermoplastic deformation, and then the patterns are adhered, so the excessive temperature also has no detection significance.

On the other hand, when the water consumption is increased, the detection time is correspondingly prolonged because more water needs to be evaporated. As in examples 10 and 12, with the increase in the amount of water used, example 12 took 10min more for the test than example 10.

Therefore, when the amount of water used was 0.15ml, the drying temperature was 60 ℃ or less, the specimen sheet could quickly reach the surface of comparative example 1, and if the time was extended, the detection accuracy was easily affected.

When the water consumption is 0.2ml, the drying temperature is preferably below 70 ℃, and when the drying temperature is below 70 ℃, the shortest time for detection is continuously reduced along with the increase of the drying temperature. And when the drying temperature is higher than 60 ℃, the detection accuracy is easily influenced.

When the water consumption is 0.25ml, the drying temperature is preferably 70 ℃, when the drying temperature is 70 ℃, the shortest time for detection is continuously reduced along with the rise of the drying temperature, and when the drying temperature is more than 70 ℃ (such as 75 ℃), the detection accuracy is influenced.

Therefore, the water consumption is 0.2ml, and the detection time is shortest when the drying temperature is 60 ℃.

In comparative examples 4 and 6, the temperature was too low, which resulted in a significant extension of the detection time.

By combining the data in tables 1 and 4, when the water consumption is 0.2ml, the drying temperature is 60 ℃, and the drying time is 60min, the detection time is short, and the detection accuracy is higher.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The detection method for the anti-sticking back performance of the water-based gloss oil is characterized by comprising the following steps of:

s4, pressing a weight on the uppermost glass plate;

s5, drying at 50-70 deg.C for 40-80min,

and S6, after drying, uncovering the first sample sheet and the second sample sheet, checking the gloss oil surface state of the sample sheets, and judging the anti-sticking performance of the gloss oil.

2. The method for detecting the anti-sticking back performance of the aqueous gloss oil according to claim 1, wherein: the sample sheet is a rectangle with the size of (10-14) cm x (10-14) cm.

3. The aqueous gloss oil of claim 1The method for detecting the anti-tack performance is characterized in that the dosage of the dripping water in the step S3 is 40-100 cm ² 0.1ml of the specimen area is added dropwise.

4. The method for detecting the anti-blocking property of an aqueous varnish according to claim 3, wherein the amount of the dripping water in the step S3 is 60-80 cm ² 0.1ml of the specimen area is added dropwise.

5. The method for detecting the anti-sticking back performance of the aqueous gloss oil according to claim 1, wherein the drying temperature is represented by t, and the amount of dripping water is represented by v;

6. The method for detecting the anti-sticking back performance of the aqueous gloss oil according to claim 1, wherein the drying temperature is 55-65 ℃.

7. The method for detecting the anti-sticking back performance of the aqueous gloss oil according to claim 1 or 2, wherein the weight amount is 0.8-1.5 kg.

8. The method for detecting the anti-sticking back performance of the aqueous gloss oil according to claim 1 or 2, wherein the sample is dried for 12 hours or more after oil is passed.

9. The method for detecting the anti-blocking property of an aqueous varnish according to claim 1, wherein, in step S1, the print sample is cut, and two 12cm x 12cm proof sheets are cut from the print sample, wherein the two proof sheets are a first proof sheet and a second proof sheet respectively;

s4, pressing a weight on the uppermost glass plate;

s5, drying at 50-70 ℃ for 60min,