CN115097113A - Test method of organic silicon leather - Google Patents

Abstract

The invention belongs to the field of synthetic leather, and particularly relates to a method for testing organic silicon leather, which can test the heat-resistant bonding performance of the organic silicon leather in a stretching state, can simulate the use of an organic silicon leather material at an application end compared with the traditional testing method, and can judge the bonding performance of the material in use. The scheme comprises the following steps: s1, cutting an organic silicon leather test sample into a rectangle, folding the sample at the middle point of a long edge, and measuring and fixing the tail end from the folded position; s2, stretching the fixed organic silicon leather test sample, loading the organic silicon leather test sample into a clamp, and scratching a silica gel material layer on at least one side of the clamp perpendicular to the stretching direction; s3, placing the organic silicon leather test sample scratched in the S2 into water for heating; s4, observing the shrinkage and/or delamination of the organosilicon leather test sample treated by the S3, and scraping the sample to observe the delamination.

Description

Test method of organic silicon leather

Technical Field

The invention belongs to the technical field of synthetic leather, and particularly relates to a testing method of organic silicon leather.

Background

Worldwide, concerns about environmental protection and animal welfare are rapidly remodeling the leather industry-especially in the world's largest leather market. Meanwhile, common leather and current synthetic substitutes cannot meet the increasing requirements of automobiles, wearable electronic products and the like in terms of weather resistance, stain resistance, odor and sustainability. Leather is generally known for its soft touch and breathability, providing a superior texture and comfort. However, it also has some significant disadvantages, including poor uv resistance, poor crack and aging resistance, and brittleness. In contrast, other types of synthetic leather, while durable, suffer from the problem of dangerous, irritating odors that result from complex chemical agents and pose a threat to human health.

The unique molecular structure of the organic silicon can meet the requirements of consumers on the softness, moisture permeability, stability and environmental protection of leather. However, silicone leather generally has the problem of easy peeling and delamination after high-temperature water boiling, which requires that manufacturers always pay attention to the water boiling resistance of silicone leather products in the development process.

The existing test methods usually place the product directly in water and keep heating to see if it is peeled off. However, the silicone leather is often in a stretched state at the application end, and the bonding performance of the silicone leather changes to some extent due to stretching, so that the bonding performance judgment of the production end and the application end is inconsistent. In view of the above, an efficient silicone leather boiling-resistant testing method is provided, which is a technical problem to be solved urgently in the field of synthetic leather.

Disclosure of Invention

The invention aims to provide a testing method of organic silicon leather. In particular, the adhesion properties of silicone leather products were tested and characterized in the stretched state.

The technical scheme adopted by the invention for solving the problems is as follows:

a test method of organic silicon leather comprises the following steps:

s1, cutting an organic silicon leather test sample into a rectangle, and folding and fixing the sample at the middle point of a long side;

s2, stretching the fixed organic silicon leather test sample, loading the stretched organic silicon leather test sample into a clamp, and scratching a silica gel material layer on at least one side of the clamp perpendicular to the stretching direction;

s3, placing the organic silicon leather test sample scratched by the S2 in water at the temperature of 95-105 ℃ for heating for 4-6 hours;

s4, observing the shrinkage and/or delamination of the organosilicon leather test sample treated by the S3, and scraping the sample to observe the delamination.

Further, the organosilicon leather test sample is a composite layer of a silica gel material layer and a substrate material layer formed by coating the silica gel material on the substrate material.

Further, the base material is PET or TPU.

Further, the rectangle in step S1 has a long side of 200-500mm and a short side of 20-50 mm. Preferably a rectangle with a long side of 300mm and a short side of 30 mm.

Further, the fixing in step S1 is performed at a position 50-200mm in the longitudinal direction from the fold back position as the starting point. Preferably, the fixing is performed at a position of 100mm in the long side direction from the folded position as a starting point

Further, when the silicone leather test sample is scratched in step S2, the silicone rubber material layer is completely scratched, and the test sample is not completely broken. Preferably, the layer of silicone material is completely scribed through, without breaking the layer of base material.

Further, in step S2, the stretching is performed so that the stretching length is 120 to 140% of the original length in the longitudinal direction. Preferably, the stretching is 130% of the original length.

Further, when the test sample of the silicone leather is scratched in step S2, the interval between two adjacent scratches is 20-30 mm. Preferably, the spacing is 20 mm.

Further, step S4 further includes classifying according to the peeling condition of the sample, wherein the classification criteria are:

no obvious shrinkage and/or delamination are generated at the cut of the sample, and the silica gel material layer and the substrate material layer are not delaminated and peeled after the sample is peeled or the peeling area is less than 5 percent of the total area of the sample, so that no peeling is judged;

slight shrinkage and/or delamination appear at the sample cut, and after the sample is scraped, the silica gel material layer and the substrate material layer are delaminated and peeled, and the peeling area is 10-30% of the total area of the sample, then medium peeling is judged;

and after the sample is scraped, the whole silica gel material layer and the base material layer are peeled/shed, and the obvious peeling is judged.

The invention has the beneficial effects that:

the testing method provided by the invention is a boiling test in a stretching state, and compared with the traditional testing method, the testing method can simulate the use of the organic silicon leather material at the application end and judge the bonding performance of the material in use. Other conventional methods in the field do not stretch or scratch the test object, and have certain deviation on the performance judgment of the material.

The test method provided by the invention carries out laceration operation on the organosilicon leather test sample, integrates the method of the hundred-lattice test, and is not applicable to the traditional hundred-lattice test because the organosilicon leather test sample is a silica gel product. The method has the advantages that the advantages of the hundred-grid test are applied to the test of the organic silicon leather through the reasonable arrangement of the steps, and the method is simple and efficient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a graph of the effect of test samples of treated silicone leather from example 1;

FIG. 2 is a graph of the effect of the treated silicone leather test sample of example 2;

FIG. 3 is a graph of the effect of the treated silicone leather test sample of example 3.

Detailed Description

The present invention will be described in detail with reference to examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.

Example 1: a test method of organic silicon leather comprises the following steps:

s1, cutting an organic silicon leather test sample into a rectangle with a long side of 300mm and a short side of 30mm, folding the sample at the middle point of the long side in half, and measuring 100mm from the folded position for fixing; the organic silicon leather test sample is a composite layer of a silica gel material layer and a base material layer formed by coating a silica gel material on the base material, wherein the base material is TPU;

s2, stretching the fixed organic silicon leather test sample to 130% of the original length, loading the organic silicon leather test sample into a clamp, and scratching a silica gel material layer on one side of the clamp perpendicular to the stretching direction, wherein the interval between two adjacent scratches is 20 mm;

s3, placing the organic silicon leather test sample scratched in the S2 into water at 100 ℃ and heating for 4 hours;

s4, observing the shrinkage and/or delamination of the organosilicon leather test sample treated by the S3, and scraping the sample to observe the delamination. The silicone material layer was observed to have no shrinkage or delamination from the TPU and no peeling occurred after scratching, as judged no peeling in fig. 1.

Example 2: a test method of organic silicon leather comprises the following steps:

s1, cutting an organic silicon leather test sample into a rectangle with a long side of 200mm and a short side of 20mm, folding the sample at the midpoint of the long side, and measuring 70mm from the folded position for fixing; the organic silicon leather test sample is formed by coating a silica gel material on a substrate material to form a composite layer of a silica gel material layer and the substrate material layer, wherein the substrate material is PET;

s2, stretching the fixed organic silicon leather test sample to 130% of the original length, loading the organic silicon leather test sample into a clamp, and scratching a silica gel material layer on one side of the clamp perpendicular to the stretching direction, wherein the interval between two adjacent scratches is 25 mm;

s3, placing the organic silicon leather test sample scratched in the S2 into water at 100 ℃ and heating for 4 hours;

s4, observing the shrinkage and/or delamination of the organosilicon leather test sample treated by the S3, and scraping the sample to observe the delamination. The silicone material layer was observed to shrink slightly and delaminate from the PET, with a peel area of about 10% after scratching, judged as a medium peel as shown in figure 2.

Example 3: a test method of organic silicon leather comprises the following steps:

s1, cutting an organic silicon leather test sample into a rectangle with a long side of 500mm and a short side of 50mm, folding the sample at the middle point of the long side in half, and measuring 200mm from the folded position for fixation; the organic silicon leather test sample is formed by coating a silica gel material on a substrate material to form a composite layer of a silica gel material layer and the substrate material layer, wherein the substrate material is PET;

s2, stretching the fixed organic silicon leather test sample to 130% of the original length, loading the organic silicon leather test sample into a clamp, and scratching a silica gel material layer on one side of the clamp perpendicular to the stretching direction, wherein the interval between two adjacent scratches is 30 mm;

s3, placing the organic silicon leather test sample scratched in the S2 in water at the temperature of 100 ℃ for heating for 4 hours;

s4, observing the shrinkage and/or delamination of the organosilicon leather test sample treated by the S3, and scraping the sample to observe the delamination. The layer of silicone material was observed to delaminate severely from the TPU and was judged to peel significantly as shown in figure 3.

The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are all within the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (9)

1. The method for testing the organic silicon leather is characterized by comprising the following steps of:

s1, cutting an organic silicon leather test sample into a rectangle, and folding and fixing the sample at the midpoint of a long edge;

s2, stretching the fixed organic silicon leather test sample, loading the stretched organic silicon leather test sample into a clamp, and scratching a silica gel material layer on at least one side of the clamp perpendicular to the stretching direction;

s3, heating the organic silicon leather test sample scratched by the S2 in water at the temperature of 95-105 ℃ for 4-6 hours;

s4, observing the shrinkage and/or delamination of the organosilicon leather test sample treated by the S3, and scraping the sample to observe the delamination.

2. The method for testing the silicone leather according to claim 1, wherein the silicone leather test sample is a composite layer of a silicone material layer and a base material layer formed by coating the silicone material on the base material.

3. The method of testing silicone leather according to claim 2, wherein the base material is PET or TPU.

4. The method for testing silicone leather according to claim 1, wherein the rectangle of step S1 is a rectangle with a long side of 200-500mm and a short side of 20-50 mm.

5. The method for testing silicone leather according to claim 1, wherein the fixing of step S1 is performed at a position 50-200mm in the longitudinal direction from the fold back position as the starting point.

6. The method for testing silicone leather according to claim 1, wherein when the silicone leather test sample is scratched in step S2, the silicone rubber material layer is completely scratched, and the test sample is not completely scratched.

7. The method for testing silicone leather according to claim 1, wherein the stretching in step S2 is stretching in a longitudinal direction to 120 to 140% of an original length.

8. The method for testing silicone leather according to claim 1, wherein step S2 is performed such that when the test sample of silicone leather is scratched, the interval between two adjacent scratches is 20-30 mm.

9. The method for testing silicone leather according to claim 1, wherein step S4 further comprises grading according to the peeling condition of the sample, wherein the grading standard is as follows:

no obvious shrinkage and/or delamination are generated at the cut of the sample, and the silica gel material layer and the substrate material layer are not delaminated and peeled after the sample is peeled or the peeling area is less than 5 percent of the total area of the sample, so that no peeling is judged;

slight shrinkage and/or delamination appear at the sample cut, and after the sample is scraped, the silica gel material layer and the substrate material layer are delaminated and peeled, and the peeling area is 10-30% of the total area of the sample, then medium peeling is judged;

and after the sample is scraped, the whole silica gel material layer and the base material layer are stripped/shed, and then the obvious stripping is judged.

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