TWM663007U - Waterproof and breathable silicone leather - Google Patents

Abstract

The invention provides waterproof and breathable organic silicon leather, which comprises a surface layer, a bottom layer arranged on the surface of the surface layer, and a base fabric covering the surface of the bottom layer; the surface layer and the bottom layer are formed with irregular micro-channels through mechanical foaming, and waterproof and breathable holes are formed on the surface, so that the bottom layer and the surface layer are bonded and the waterproof and breathable holes are connected, so that the micro-channels of the bottom layer are connected to the micro-channels of the surface layer; thereby, the good waterproof performance of the organic silicon material itself is combined with the mechanical foaming technology to achieve a balance between waterproof and breathable performance, thereby achieving improved use comfort, weather resistance and wear resistance.

Description

Waterproof and breathable silicone leather

The invention relates to the field of artificial leather technology, in particular to waterproof and moisture-permeable organic silicon leather and its preparation method.

With the rapid development of modern industry and technology, artificial leather is widely used in daily life, such as shoemaking, clothing, furniture and car interior. Artificial leather is mainly based on synthetic materials, made by chemical treatment and mechanical processing, and has the advantages of low cost, easy processing and customization. However, the existing artificial leather has some defects in waterproof and moisture permeability. The common artificial leathers on the market mainly include polyvinyl chloride (PVC) leather, polyurethane (PU) leather and silicone leather.

PVC leather is cheap, has a mature production process and is easy to process, but has poor air permeability and may become hard and brittle after long-term use. It is also not environmentally friendly and has some pollution to the environment. PU leather has a texture closer to natural leather, is softer and has higher wear resistance, but has limited air permeability and waterproof properties. It may age and decompose after long-term contact with moisture, and has some impact on the environment. Silicone leather has better resistance to high and low temperatures and aging, and has better environmental protection, but has a higher production cost, and its air permeability and waterproof properties still need to be improved in some application scenarios.

Although the above-mentioned existing technologies have certain advantages in different aspects, they still have shortcomings in terms of both waterproof and breathable performance. Traditional artificial leather often sacrifices breathability when pursuing waterproof performance, resulting in reduced comfort during use of the product, especially in the field of footwear and clothing. In addition, the existing PVC and PU leathers have certain negative impacts on the environment during production and disposal. With the improvement of environmental awareness, the market demand for environmentally friendly materials has become more urgent. Some artificial leathers are prone to aging, discoloration, cracking and other problems after long-term use, affecting the beauty and service life of the product.

Therefore, developing a new type of waterproof and breathable organic silicon leather and its preparation method can meet the market demand for high-performance, environmentally friendly and durable materials, and has important practical significance and broad application prospects.

In view of the above-mentioned known technical problems, the purpose of the present invention is to provide a waterproof and breathable organic silicon leather and a preparation method thereof. Organic silicon material itself has good waterproof performance, combined with mechanical foaming technology, it can achieve a balance between waterproof and breathable performance, improve the comfort of use, and make the new organic silicon leather have excellent waterproof and breathable properties, and have significant improvements in environmental protection performance, service life and durability. In addition, organic silicon material is an environmentally friendly material, and has little impact on the environment during production and disposal, which meets the market demand for green materials. Organic silicon leather also has high weather resistance and wear resistance, and is not prone to aging, cracking and other problems after long-term use, which extends the service life of the product.

Based on the above purpose, the present invention provides a waterproof and breathable organic silicone leather, including: A surface layer, having a first surface and a second surface opposite to the first surface; the interior of the surface layer is mechanically foamed with irregular micro-channels, and the micro-channels are connected to the first surface and the second surface to form waterproof and breathable holes; A bottom layer, having a third surface and a fourth surface opposite to the third surface; the interior of the bottom layer is mechanically foamed with another irregular micro-channel, and the other micro-channel is connected to the third surface and the fourth surface to form another waterproof and breathable hole; the third surface of the bottom layer is bonded to the second surface of the surface layer, the other waterproof and breathable hole on the third surface is connected to the waterproof and breathable hole on the second surface, and the other micro-channel of the bottom layer is connected to the micro-channel of the surface layer; A base fabric covering and bonding to the fourth surface of the bottom layer.

According to the embodiment of the present invention, the pore size of the micro channel and the waterproof and breathable hole of the surface layer can be independently 0.2μm to 5μm. In one embodiment, the pore size of the micro channel and the waterproof and breathable hole of the surface layer can be independently 0.2µm, 0.5µm, 0.8µm, 1.1µm, 1.4µm, 1.7µm, 2µm, 2.3µm, 2.6µm, 2.9µm, 3.2µm, 3.5µm, 3.8µm, 4.1µm, 4.4µm, 4.7µm or 5µm, but not limited to these; each of the above specific values can be used as the end point value of another range. Preferably, the pore sizes of the microchannels and the waterproof and moisture permeable holes of the surface layer can be independently approximately 2µm.

According to an embodiment of the present invention, the pore size of the another micro channel and the another waterproof and breathable hole of the bottom layer can be independently 0.2μm to 5μm. Specifically, the pore size of the another micro channel and the another waterproof and breathable hole of the bottom layer can be independently 0.2µm, 0.5µm, 0.8µm, 1.1µm, 1.4µm, 1.7µm, 2µm, 2.3µm, 2.6µm, 2.9µm, 3.2µm, 3.5µm, 3.8µm, 4.1µm, 4.4µm, 4.7µm or 5µm; but not limited to this, each of the above specific values can be used as an end point value of another range. More specifically, the pore sizes of the another microchannel and the another waterproof and moisture permeable hole of the bottom layer can be independently approximately 2µm.

According to an embodiment of the present invention, the thickness of the organic silicon leather may be 0.09 mm to 0.22 mm. Specifically, the thickness of the organic silicon leather may be 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.20 mm, 0.21 mm or 0.22 mm; but not limited thereto, each of the above specific values may be used as an end point value of another range.

According to the embodiment of the present invention, the thickness of the surface layer can be 0.02 mm to 0.07 mm. Specifically, the thickness of the surface layer can be 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm or 0.07 mm; but not limited to this, each of the above specific values can be used as an end point value of another range.

According to the embodiment of the present invention, the thickness of the bottom layer can be 0.07 mm to 0.15 mm. Specifically, the thickness of the bottom layer can be 0.07 mm, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm or 0.15 mm; but not limited to this, each of the above specific values can be used as an end point value of another range.

According to an embodiment of the present invention, the thickness ratio of the surface layer to the bottom layer may be 2:7 to 7:15.

According to the implementation of the present invention, the composition of the surface layer may include, by weight: Liquid silicone, 100 parts by weight; Talc, 5 to 10 parts by weight; Hydrogen-containing crosslinking agent, 2 to 6 parts by weight; and Platinum catalyst, 1 to 1.2 parts by weight.

According to the implementation of the present invention, the composition of the base layer may include, by weight: Liquid silicone, 100 parts by weight; Vinyl silicone oil, 4 to 10 parts by weight; Aluminum hydroxide, 80 to 100 parts by weight; Hydrogen-containing crosslinking agent, 2 to 6 parts by weight; and Platinum catalyst, 1 to 1.2 parts by weight.

According to the implementation of the present invention, the touch feel of the surface layer is improved by adding the talcum powder, so that the surface layer has a smooth feel and scratch resistance. In addition, by adding talcum powder to the liquid silicone, the material property that the surface tension of talcum powder is significantly higher than that of liquid silicone, resulting in low compatibility between the two, can be utilized. After combining with mechanical foaming processing, a high-porosity foam structure can be formed, effectively improving the waterproof and moisture-permeable performance of the present organic silicone leather.

In one embodiment, the talc powder of the surface layer can be 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 10 parts by weight; but not limited to this, each of the above specific values can be used as an end point value of another range.

In one embodiment, the average particle size (D50) of the talc powder of the surface layer may be 2.6 micrometers (µm) to 3.5µm. Specifically, the average particle size (D50) of the talc powder may be 2.6µm, 2.7µm, 2.8µm, 2.9µm, 3µm, 3.1µm, 3.2µm, 3.3µm, 3.4µm or 3.5µm; but not limited to this, each of the above specific values can be used as an endpoint value of another range.

According to the implementation of the present invention, by adding aluminum hydroxide to the liquid silicone constituting the base layer, the material property that the surface tension of aluminum hydroxide is significantly higher than that of liquid silicone, resulting in low compatibility between the two, can be utilized. After combining with mechanical foaming processing, the base layer forms a high-porosity foam structure, and the base layer and the surface layer are combined to form an organic silicone leather with waterproof, moisture-permeable and flame-retardant properties.

In one embodiment, the aluminum hydroxide content of the bottom layer may be 80 parts by weight, 83 parts by weight, 86 parts by weight, 89 parts by weight, 92 parts by weight, 95 parts by weight, 98 parts by weight or 100 parts by weight; but not limited to these, each of the above specific values can be used as an endpoint value of another range.

In one embodiment, the average particle size (D50) of the aluminum hydroxide of the bottom layer may be 2.6 micrometers (µm) to 3.5µm. Specifically, the average particle size (D50) of the aluminum hydroxide may be 2.6µm, 2.7µm, 2.8µm, 2.9µm, 3µm, 3.1µm, 3.2µm, 3.3µm, 3.4µm or 3.5µm; but not limited to this, each of the above specific values can be used as an endpoint value of another range.

In one embodiment, the vinyl silicone oil of the bottom layer can be 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 10 parts by weight; but not limited to this, each of the above specific values can be used as the end point value of another range. Vinyl silicone oil is a divinyl-terminated polydimethylsiloxane, or a methylvinyl polysiloxane with a vinyl group in the middle of the molecular chain. In addition to the possible difference in the number and position of the vinyl group, another difference between liquid silicone and vinyl silicone oil is that the molecular weight or viscosity of liquid silicone is greater than that of vinyl silicone oil.

According to the implementation of the present invention, by adding a proper amount of hydrogen-containing crosslinking agent and platinum catalyst to the base layer and the base layer, the liquid silicone and other additives are cured to form an organic silicone leather with flexible properties.

In one embodiment, the hydrogen-containing crosslinking agent of the top layer and the bottom layer can be 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight or 6 parts by weight respectively; but not limited to this, each of the above specific values can be used as an end point value of another range. The hydrogen-containing crosslinking agent can be poly(methyl hydrogen siloxane) (PMHS).

In one embodiment, the hydrogen-containing crosslinking agent used for the surface layer and the bottom layer is a hydrogen-containing crosslinking agent having a hydrogen content of 0.5wt% to 1.0wt%. Specifically, the hydrogen content of the hydrogen-containing crosslinking agent can be 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt% or 1wt%; but not limited to this, each of the above specific values can be used as an end point value of another range.

In one embodiment, the platinum-gold catalyst of the surface layer and the bottom layer can be 1 weight part, 1.1 weight parts or 1.2 weight parts respectively; but not limited to this, each of the above specific values can be used as the end point value of another range. The platinum-gold catalyst can be chloroplatinic acid (H ₂ PtCl ₆ )

In one embodiment, the platinum-gold catalyst used for the surface layer and the bottom layer is chloroplatinic acid (H ₂ PtCl ₆ ) with a concentration of 500 ppm to 5000 ppm. Specifically, the concentration of the platinum-gold catalyst can be 500 ppm, 1000 ppm, 1500 ppm, 2000 ppm, 2500 ppm, 3000 ppm, 3500 ppm, 4000 ppm, 4500 ppm or 5000 ppm; but not limited thereto, each of the above specific values can be used as an end point value of another range.

According to the implementation of the present invention, the surface layer and the bottom layer can each independently add 0.5 to 3 parts by weight of color paste to adjust the color of the waterproof and moisture-permeable organic silicone leather.

In one embodiment, the color paste of the surface layer and the base layer can be independently 0.5 weight parts, 0.8 weight parts, 1.1 weight parts, 1.4 weight parts, 1.7 weight parts, 2 weight parts, 2.3 weight parts, 2.6 weight parts, 2.9 weight parts or 3 weight parts; but not limited to this, each of the above specific values can be used as the endpoint value of another range.

According to the embodiment of the present invention, the base fabric can be selected from one of knitted leather base fabric, machine-woven leather base fabric and microfiber leather base fabric. Specifically, the material of the leather base fabric can be one of polyester-cotton blended base fabric, pure polyester base fabric, pure cotton base fabric and polyester-viscose blended base fabric.

In one embodiment, the weight of the base fabric may be 60 g to 500 g. Specifically, the weight of the base fabric may be 60 g, 90 g, 120 g, 150 g, 180 g, 210 g, 240 g, 270 g, 300 g, 330 g, 360 g, 390 g, 420 g, 450 g, 480 g or 500 g; but not limited to this, each of the above specific values can be used as an endpoint value of another range.

The present invention also provides a method for preparing waterproof and breathable organic silicone leather, the method comprising the following steps: a surface glue preparation step: by weight, 100 parts of liquid silicone and 5 to 10 parts of talcum powder are mechanically foamed to form a first foam body; then 2 to 6 parts of a hydrogen-containing crosslinking agent and 1 to 1.2 parts of a platinum catalyst are added and mixed evenly; a base glue preparation step: by weight, 100 parts of liquid silicone and 4 to 10 parts of vinyl silicone oil are mixed and stirred to form a foam structure mixture, and then 80 to 100 parts of aluminum hydroxide (Al(OH) ₃ ), mechanically foaming to form a second foamed body; then adding 0.2 to 0.6 parts of a hydrogen-containing crosslinking agent and 0.1 to 0.12 parts of a platinum catalyst and mixing them evenly; The surface layer preparation step comprises the following steps: applying the first foam body to a surface of a release paper with a thickness of 0.02 mm to 0.07 mm by scraping, so as to form a first foam layer; transferring the first foam layer and the release paper to a tunnel oven for baking and curing and molding, wherein the first half of the total curing and molding time is defined as the front curing and molding stage, and the second half of the total curing and molding time is defined as the back curing and molding stage, wherein the heating temperature in the front curing and molding stage is 80° C. to 90° C., and the heating temperature in the back curing and molding stage is 120° C. to 150° C.; and curing and molding the first foam layer into a surface layer having a plurality of micro channels formed therein; Preparation steps of the bottom layer: the second foam body is scraped and coated on the surface of the surface layer with a thickness of 0.07mm to 0.15mm to form a second foam layer, and then a base cloth is immediately covered on the surface of the second foam layer; the second foam layer, the base cloth, the surface layer and the release paper are transferred to the tunnel oven for baking and curing and molding. The first half of the total time of the curing and molding process is defined as the front stage of curing and molding, and the second half of the total time is the post-curing and molding stage. The heating temperature in the front curing and forming stage is 80°C to 90°C, and the heating temperature in the rear curing and forming stage is 120°C to 150°C; the second foaming layer is cured and formed into a bottom layer with a plurality of micro channels formed therein, the bottom layer is adhered to the surface of the surface layer, and the base fabric is adhered to the surface of the bottom layer; and a release paper peeling step: the release paper is peeled off, and the surface layer, the bottom layer and the base fabric are cured and bonded to form a waterproof and moisture permeable organic silicon leather.

According to the implementation of the present invention, the steps of the method are not limited by sequence number, as long as the top layer is prepared before the bottom layer; the base glue can also be prepared before the top glue, or the base glue can be prepared after the top layer is prepared.

According to the embodiment of the present invention, in the step of preparing the dough, the first foam is formed by fully stirring the dough with a double planetary mixer at a speed of 2000 rpm to 4000 rpm for 15 to 20 minutes.

According to the novel implementation, in the base glue preparation step, the foam structure mixture is formed by stirring the liquid silicone and the vinyl silicone oil using a double planetary mixer for 15 to 20 minutes.

According to the embodiment of the present invention, in the base glue preparation step, the second foam is formed by fully stirring the second foam with a double planetary mixer at a speed of 4000 rpm to 6000 rpm for 15 to 20 minutes.

According to the implementation of the present invention, in the surface layer preparation step or the bottom layer preparation step, the total time for the curing molding process can be 10 minutes to 30 minutes.

In one embodiment, the heating time in the front stage of the curing molding is 10 minutes to 15 minutes, and the heating time in the back stage of the curing molding is 10 minutes to 15 minutes.

In one embodiment, in the surface layer preparation step or the bottom layer preparation step S4, the heating temperature of the front stage of curing and molding can be 80°C, 85°C or 90°C; but not limited to this, each of the above specific values can be used as an endpoint value of another range.

In one embodiment, in the surface layer preparation step or the bottom layer preparation step, the heating temperature of the latter stage of curing and molding may be 120°C, 130°C, 140°C or 150°C; but not limited to this, each of the above specific values may be used as an endpoint value of another range.

In one embodiment, the volume ratio of the first foam in the step of preparing the adhesive to its raw material (the sum of liquid silicone and talcum powder) is about 1.2:1.

In one embodiment, the volume ratio of the second foam in the primer preparation step to its raw materials (the sum of liquid silicone, vinyl silicone oil and aluminum hydroxide) is about 1.2:1.

In order to facilitate understanding of the technical features, contents and advantages of the present invention and the effects that can be achieved, the present invention is described in detail as follows in conjunction with the accompanying drawings. The drawings used therein are intended only for illustration and auxiliary description, and may not be the true proportions and precise configurations of the present invention after implementation. Therefore, the proportions and configurations of the attached drawings should not be interpreted to limit the scope of rights of the present invention in actual implementation.

《Waterproof and moisture-permeable silicone leather》

As shown in FIG. 1 to FIG. 5 , the preparation process structure and the preparation method of the novel waterproof and moisture permeable organic silicon leather are provided.

As shown in FIG5 , the steps of the preparation method of the novel waterproof and breathable organic silicone leather include a surface glue preparation step S1, a bottom glue preparation step S2, a surface layer preparation step S3 (see also FIG1 ), a bottom layer preparation step S4 (see also FIG2 , FIG3 ) and a release paper peeling step S5 (see also FIG4 ); thereby, through the aforementioned steps, a waterproof and breathable organic silicone leather structure as shown in FIG4 is obtained, which includes a surface layer 20, a bottom layer 30 and a base fabric 40.

As shown in FIG. 4 , the surface layer 20 is formed with a first surface 21 and a second surface 22 opposite to the first surface 21 ; the interior of the surface layer 20 is mechanically foamed to form an irregular micro-channel 23 , and the micro-channel 23 is connected to the first surface 21 and the second surface 22 to form a waterproof and moisture-permeable hole 24 . The bottom layer 30 is formed with a third surface 31 and a fourth surface 32 opposite to the third surface 31; the inside of the bottom layer 30 is mechanically foamed to form irregular micro-channels 33, and the micro-channels 33 are connected to the third surface 31 and the fourth surface 32 to form waterproof and moisture-permeable holes 34; the third surface 31 of the bottom layer 30 is bonded to the second surface 22 of the surface layer 20, the waterproof and moisture-permeable holes 34 on the third surface 31 are connected to the waterproof and moisture-permeable holes 24 on the second surface 22, and the micro-channels 33 of the bottom layer 30 are connected to the micro-channels 23 of the surface layer 20. The base fabric 40 is covered and bonded to the fourth surface 32 of the bottom layer 30 during the preparation process.

Embodiment 1 to 8(E1 to E8) :

The composition ratios of Examples 1 to 8 are shown in Table 1 below; the preparation steps of Examples 1 to 8 are as follows: Preparation step S1 of the adhesive: as shown in Table 1 below, in parts by weight, according to the proportions of each embodiment, liquid silicone (China, Dongguan Wenyi, model: ADO-1) and talcum powder (Xufeng, model: XFH-934071-Y6) are fully stirred for 15 to 20 minutes at a speed of 2000 rpm to 4000 rpm using a double planetary stirrer to perform mechanical foaming to form a first foam body; color paste is added to the first foam body and stirred for 10 to 15 minutes to fully mix the color paste with the first foam body; then a hydrogen-containing crosslinking agent (hydrogen content 0.75wt%, Kunshan Dawei, model: DW-300100) and _a platinum catalyst ( _H2PtCl6 , concentration 2000ppm, Kunshan Dawei, model: DW-2000SW) were mixed evenly; Primer preparation step S2: As shown in Table 1 below, in parts by weight, according to the proportions of each embodiment, liquid silicone (China, Dongguan Wenyi, model: ADO-1) and vinyl silicone oil (China, Kunshan Dawei, model: DW-300550) were mixed and stirred using a double planetary mixer to form a foam structure mixture; aluminum hydroxide (Al(OH) ₃ , average particle size (D50) is 2.6µm to 3.5µm), and a double planetary stirrer is used to stir at a speed of 4000rpm to 6000rpm for 15 minutes to 20 minutes to perform mechanical foaming to form a second foam body; then a hydrogen-containing crosslinking agent (hydrogen content 0.75wt%, Kunshan Dawei, model: DW-300100) and a platinum catalyst ( _H2PtCl6 , concentration 2000ppm, Kunshan Dawei model: DW _- 2000SW) are added and mixed evenly; Surface layer preparation step S3: scrape the first foam body with a thickness of 0.02 mm to 0.07 mm on the surface of a release paper 10 to form a first foam layer; transfer the first foam layer and the release paper 10 to a 20-meter-long tunnel oven for baking and curing and molding; heat at a temperature of 80°C to 90°C for 10 minutes to 15 minutes in the front stage of the curing and molding, and heat at a temperature of 120°C to 150°C for 10 minutes to 15 minutes in the back stage of the curing and molding; cure the first foam layer to form a surface layer 20 with a plurality of microchannels 23 formed therein (as shown in FIG. 1); Step S4 of preparing the bottom layer: scraping the second foam body with a thickness of 0.07 mm to 0.15 mm on the surface of the surface layer 20 to form a second foam layer (as shown in FIG. 2 ), and immediately covering the surface of the second foam layer with a base cloth 40 (as shown in FIG. 3 ); transferring the second foam layer, the base cloth 40, the surface layer 20 and the release paper 10 to the tunnel oven for baking and curing and forming; The first stage of the curing and molding is heated at a temperature of 80°C to 90°C for 10 minutes to 15 minutes, and the second stage of the curing and molding is heated at a temperature of 120°C to 150°C for 10 minutes to 15 minutes; the second foaming layer is cured and molded into a bottom layer 30 with a plurality of micro channels 33 formed therein, the bottom layer 30 is adhered to the surface of the surface layer 20, and the base fabric 40 is adhered to the surface of the bottom layer 30 (as shown in FIG. 3); the release paper peeling step S5: the release paper 10 is peeled off, and the surface layer 20, the bottom layer 30 and the base fabric 40 are cured and bonded to form a waterproof and moisture-permeable organic silicon leather (as shown in FIG. 4).

Table 1: Structure Ingredients Embodiment E1 E2 E3 E4 E5 E6 E7 E8 Surface Liquid Silicone 100 100 100 100 100 100 100 100 talcum powder 5 10 8 8 8 8 8 8 Color paste 2 2 2 2 2 2 2 2 Hydrogenated crosslinking agent 4 4 2 6 4 4 4 4 Platinum catalyst 1.1 1.1 1.1 1.1 1 1.2 1.1 1.1 Bottom layer Liquid Silicone 100 100 100 100 100 100 100 100 Vinyl silicone oil 7 7 7 7 7 7 7 7 Aluminum hydroxide 90 90 90 90 90 90 80 100 Color paste 2 2 2 2 2 2 2 2 Hydrogenated crosslinking agent 4 4 2 6 4 4 4 4 Platinum catalyst 1.1 1.1 1.1 1.1 1 1.2 1.1 1.1

Comparison ratio 1 to 8(C1 to C8) :

The composition ratios of Comparative Examples 1 to 8 are shown in Table 1 below; the preparation steps of Comparative Examples 1 to 8 are the same as those of Examples 1 to 8.

Table 2: Structure Ingredients Comparison ratio C1 C2 C3 C4 C5 C6 C7 C8 Surface Liquid Silicone 100 100 100 100 100 100 100 100 talcum powder 4 11 8 8 8 8 8 8 Color paste 2 2 2 2 2 2 2 2 Hydrogenated crosslinking agent 4 4 1 7 4 4 4 4 Platinum catalyst 1.1 1.1 1.1 1.1 0.9 1.3 1.1 1.1 Bottom layer Liquid Silicone 100 100 100 100 100 100 100 100 Vinyl silicone oil 7 7 7 7 7 7 7 7 Aluminum hydroxide 90 90 90 90 90 90 79 101 Color paste 2 2 2 2 2 2 2 2 Hydrogenated crosslinking agent 4 4 1 7 4 4 4 4 Platinum catalyst 1.1 1.1 1.1 1.1 0.9 1.3 1.1 1.1

《Performance Test》

As shown in Table 3 below, the product feel, air permeability, waterproofness scores and tear strength test results of Examples 1 to 8 (E1 to E8) and Comparative Examples 1 to 8 (C1 to C8) are provided.

Table 3: Product Name Feel Breathability Waterproof Tear strength(KG) Embodiment E1 5 5 6 15 E2 5 6 6 14 E3 6 5 6 14 E4 5 5 6 17 E5 6 5 6 15 E6 5 5 6 14 E7 5 5 6 16 E8 5 6 6 14 Comparison ratio C1 4 3 5 11 C2 4 4 5 11 C3 4 4 5 10 C4 3 4 5 13 C5 4 4 5 12 C6 3 4 5 10 C7 4 3 5 11 C8 4 4 5 10

Test Example 1: Product Feel

As shown in Table 3, the feel was determined subjectively on a scale of 1 to 6, where 1 indicates a very hard product, 2 indicates a hard product, 3 indicates a slightly hard product, 4 indicates a slightly soft product, 5 indicates a soft product, and 6 indicates a very soft product, and N/M = cannot be measured.

As can be seen from Table 3, the hand feel of the silicone leather products of Examples E1 to E8 is soft or very soft. In contrast, referring to Tables 1 and 2, after one or two components exceed the composition ratio range defined in Examples E1 to E8, it can be seen that the hand feel of the products of Comparative Examples C1 to C8 is slightly hard or slightly soft. It is obvious that the composition ratio defined in the silicone leather of Examples E1 to E8 can indeed bring a better hand feel experience to the products.

Test Example 2: Product Breathability

As shown in FIG6 and FIG7, a gas permeability test device 50 is provided, which includes an air inlet bottle 51 and a gas permeable cylinder 54, both of which are cylindrical and have the same thickness and diameter. The bottom of the air inlet bottle 51 is closed and connected to an air inlet pipe 511. The top of the air inlet bottle 51 is formed with a bottle mouth (covered by organic silicon leather A in FIG6 and FIG7). The top and bottom ends of the gas permeable cylinder 54 are connected to form an upper opening 541 and a lower opening 542 respectively; the outer walls of the opposite sides of the air inlet bottle 51 are respectively provided with a hook The air-permeable cylinder 54 has a bottom end 52, and the two opposite side outer walls of the bottom end thereof are respectively provided with a fastening clip 53; as shown in FIGS. 6 and 7, the organic silicon leather A of Examples 1 to 8 (E1 to E8) and Comparative Examples 1 to 8 (C1 to C8) is clamped between the bottle mouth of the air inlet bottle 51 and the lower opening 542 of the air-permeable cylinder 54, and the organic silicon leather A is clamped and sealed between the bottle mouth of the air inlet bottle 51 and the lower opening 542 of the air-permeable cylinder 54 by aligning the fastening clip 53 with the hook portion 52 and then fastening them. Therefore, in the second test example, water is added to the breathable cylinder 54, and then gas is introduced from the air inlet pipe 511. The bubbles generated on the upper surface of the organic silicone leather A (the surface in contact with water) are scored by visually observing 10 seconds after the gas is introduced.

As shown in Table 3, air permeability was determined subjectively on a scale of 1 to 6, wherein 1 indicates a product with no bubbles, 2 indicates a product with very few bubbles, 3 indicates a product with no bubbles partially on the surface, 4 indicates a product with a surface full of bubbles, 5 indicates a product with many bubbles, and 6 indicates a product with extremely many bubbles, and N/M = cannot be measured.

As can be seen from Table 3, the organic silicon leathers of Examples E1 to E8 all showed a state of many bubbles or extremely many bubbles in the air permeability test, indicating that the products of Examples E1 to E8 have excellent air permeability. In contrast, referring to Tables 1 and 2, after one or two components exceed the composition ratio range specified in Examples E1 to E8, it can be seen that Comparative Examples C1 to C8 all showed a state of partial surface no bubbles or only surface full of bubbles in the air permeability test, which shows that the air permeability of the products of Comparative Examples C1 to C8 is quite limited and far inferior to the air permeability of Examples E1 to E8.

Test Example 3: Product Waterproofness

Using the same air permeability test device 50 as shown in FIG. 6 and FIG. 7 , the air was introduced into the second test example 10 seconds later, and then the air was stopped. The lower surface of the organic silicone leather A (the surface in contact with the gas) was visually inspected 10 seconds after the air was stopped to see if there was any water leakage, and the score was given.

As shown in Table 3, air permeability is determined subjectively on a scale of 1 to 6, where 1 indicates a product with obvious water leakage, 2 indicates a product with slight water leakage on the lower surface, 3 indicates a product with obvious water seepage on the lower surface, 4 indicates a product with slight water seepage on the lower surface, 5 indicates a product with slight moisture in the intake cylinder, and 6 indicates a product with no moisture at all in the intake cylinder. N/M = cannot be measured.

As can be seen from Table 3, the silicone leathers of Examples E1 to E8 all showed a state of no moisture in the air intake cylinder in the waterproof test, indicating that the products of Examples E1 to E8 have excellent waterproof effects and can effectively prevent water or water vapor from penetrating. In contrast, referring to Tables 1 and 2, when one or two components exceed the composition ratio range specified in Examples E1 to E8, it can be seen that Comparative Examples C1 to C8 all showed a state of slight moisture in the air intake cylinder in the waterproof test, which shows that the waterproof performance of the products of Comparative Examples C1 to C8 is poor and cannot achieve true waterproof and moisture permeability performance.

Test Example 4: Product Tear Strength

This test case is based on the standard method ASTM D2262.

As can be seen from Table 3, the tear strength of the silicone leather products of Examples E1 to E8 is between 14KG and 17KG; in contrast, referring to Tables 1 and 2, after one or two components exceed the composition ratio range defined in Examples E1 to E8, it can be seen that the tear strength of the products of Comparative Examples C1 to C8 is between 10KG and 13KG, which is significantly lower than the tear strength performance of Examples E1 to E8. It can be seen that the composition ratio defined in the silicone leather of Examples E1 to E8 can indeed bring better tear strength to the product.

The embodiments described above are only for illustrating the technical ideas and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They cannot be used to limit the patent scope of the present invention. In other words, any equivalent changes or modifications made according to the spirit disclosed by the present invention should still be included in the patent scope of the present invention.

10: Release paper 20: Surface layer 21: First surface 22: Second surface 23: Micro channel 24: Waterproof and moisture permeable hole 30: Bottom layer 31: Third surface 32: Fourth surface 33: Micro channel 34: Waterproof and moisture permeable hole 40: Base fabric 50: Breathability test device 51: Air inlet bottle 511: Air inlet pipe 52: Hook and buckle part 53: Fastening clip 54: Breathable cylinder 541: Upper opening 542: Lower opening A: Silicone leather S1: Surface glue preparation step S2: Bottom glue preparation step S3: Surface layer preparation step S4: Bottom layer preparation step S5: Release paper peeling step

FIG1 is a schematic diagram of the structure of the surface layer of the novel organic silicone leather formed on the release paper. FIG2 is a schematic diagram of the structure of the surface layer and the bottom layer of the novel organic silicone leather combined on the release paper. FIG3 is a schematic diagram of the structure of the surface layer, the bottom layer and the base fabric of the novel organic silicone leather combined on the release paper. FIG4 is a schematic diagram of the structure of the novel organic silicone leather. FIG5 is a flow chart of the steps of the manufacturing method of the novel organic silicone leather. FIG6 is a structural diagram of the experimental device of the second experimental example of the novel (I). FIG7 is a structural diagram of the experimental device of the second experimental example of the novel (II).

20: Top layer

21: First surface

22: Second surface

23: Microchannel

24: Waterproof and moisture-permeable holes

30: Bottom layer

31: Third surface

32: The fourth surface

33: Microchannel

34: Waterproof and moisture-permeable holes

40: Base fabric

Claims (4)

A waterproof and breathable organic silicone leather, comprising: A surface layer, having a first surface and a second surface opposite to the first surface; the interior of the surface layer is mechanically foamed with irregular micro-channels, the micro-channels are connected to the first surface and the second surface to form waterproof and breathable holes; A bottom layer, having a third surface and a fourth surface opposite to the third surface; the interior of the bottom layer is mechanically foamed with another irregular micro-channel, the other micro-channel is connected to the third surface and the fourth surface to form another waterproof and breathable hole; the third surface of the bottom layer is bonded to the second surface of the surface layer, the other waterproof and breathable hole on the third surface is connected to the waterproof and breathable hole on the second surface, and the other micro-channel of the bottom layer is connected to the micro-channel of the surface layer; A base fabric covering and bonding to the fourth surface of the bottom layer. The waterproof and breathable organic silicon leather as described in claim 1, wherein the pore size of the microchannels and the waterproof and breathable holes of the surface layer is 0.2 μm to 5 μm; the pore size of the microchannels and the waterproof and breathable holes of the bottom layer is 0.2 μm to 5 μm. The waterproof and moisture-permeable silicone leather as described in claim 2, wherein the thickness of the silicone leather is 0.08 mm to 0.15 mm. The waterproof and moisture-permeable silicone leather as described in claim 3, wherein the thickness ratio of the top layer to the bottom layer is 2:7 to 7:15.

Images