WO2021253630A1

WO2021253630A1 - Wear-resistant foam automobile mat and preparation method

Info

Publication number: WO2021253630A1
Application number: PCT/CN2020/111332
Authority: WO
Inventors: 陈统照
Original assignee: 浙江天盛汽车配件有限公司
Priority date: 2020-06-16
Filing date: 2020-08-26
Publication date: 2021-12-23
Also published as: CN111607982B; CN111607982A

Abstract

The present invention relates to the technical field of automobile interior décor articles, specifically a wear-resistant foam automobile mat and a preparation method utilizing the foaming capacity of latex, comprising the following steps: dispersing an inorganic fiber within the latex and adding a foaming agent, a vulcanizing agent, and an anti-oxidation agent and slowly stirring, generating bubbles, thereby forming a foam having evenly-distributed closed-cell fine bubbles; further providing a certain amount of a gelling agent, spreading same on a linen base fabric, and by means of hot steam vulcanizing, causing the vulcanized foam to solidify on the linen base fabric, forming a foam latex base mat, and obtaining a base mat provided with good spring-back resilience, softness, and comfort. In a further step, dispersing a polyurethane glue, a silicone powder, a glass powder, and a ceramic powder into a spray, and spraying same on the foam layer, providing the foam with good water resistance, self-cleaning ability, and wear resistance. An automobile mat obtained in this way is comfortable for feet, wear-resistant, slip-resistant, water-resistant, and self-cleaning, greatly improving the decorative sense and texture of automobile interior décor.

Description

Wear-resistant foamed automobile foot pad and preparation method thereof

Technical field

The invention belongs to the field of automotive interior products, and specifically relates to a wear-resistant foamed automotive foot pad and a preparation method.

Background technique

As a kind of conventional car interior products, car mats have now become the standard equipment of automobiles. Its main purpose is to protect the car ground, isolate chassis noise, and have good comfort and durability. On the one hand, the use of car mats avoids stepping in the dirty car and facilitates cleaning; on the other hand, the car mats are required to have good wear resistance, waterproof, dustproof, and non-slip properties, and do not affect driving safety.

With the rapid development of China's automobile industry, the current car mats have gradually matured in terms of material selection and production technology. The main materials of car mats are chemical fiber mats, PVC mats, rubber mats, silk ring mats, flax mats, leather mats, wool mats and so on. Chemical fiber foot pads are very dirty; although linen foot pads are cheap and soft, they are easy to fluff and deform after cleaning; PVC foot pads are easy to clean, but they are easy to age and harden; they are easy to harden in winter; leather foot pads are easy to clean. But the sound insulation effect is poor; the rubber feet are easy to clean, but they are not environmentally friendly and have a heavy smell; the wool feet are expensive and difficult to clean.

At present, in order to pursue a comfortable texture, the foot pads are made of high-grade materials such as wool, which are not only difficult to clean, but also have poor slip resistance, which will affect driving safety. High-quality and low-cost, satisfying and comfortable texture foot pads make the current market urgently needed products. Chinese Invention Patent Publication No. CN 103897222A discloses a car floor mat roll material that can be cut arbitrarily and its manufacturing process. It uses natural rubber, calcium carbonate, and accelerators to be mixed in an internal mixer, and then put into a rubber mixing furnace. ; Put in sulfur, stir evenly, and form a thermoplastic elastic rubber sheet from the rubber mixing furnace; the hot pressing roller can press the uneven texture. This technology discloses the use of natural rubber to prepare car mats, but it fails to obtain a mat with an excellent cushioning texture.

Natural rubber, as a kind of completely biomass-derived rubber, has great prospects in the application of car mats. Especially natural rubber latex, its suitable resilience has been used in latex mattresses and other aspects, and its cushioning texture is strong. However, there are few applications of natural latex in car mats. The natural latex is improved and processed into a foot pad with abundant closed cells, wear-resistant, waterproof and self-cleaning, which has great potential in improving the texture of the foot pad, enhancing the quality of car interiors and ensuring safe driving.

Summary of the invention

Aiming at the problems of current wool foot pads that are difficult to clean, poor safety, and foamed car foot pads have poor comfort and wear resistance, the present invention provides a wear-resistant foamed car foot pad and a preparation method. Its fundamental feature is to process the natural rubber emulsion with closed-cell bubbles, use inorganic fibers to modify it to form a textured foot pad with excellent resilience, and at the same time use a wear-resistant coating to process it to obtain a wear-resistant foam car foot pad.

In order to obtain good comfort and abrasion resistance of foamed car mats, a method for preparing wear-resistant foamed car mats is first provided, which is characterized in that the specific preparation method is as follows:

(1) Add the latex, inorganic fiber, foaming agent, vulcanizing agent, and antioxidant to the mixer, stir at 40-50rpm for 5-10min, the latex foams to form uniform fine foam, then add the gelling agent, continue to stir 1- 2min to obtain a foam containing uniform fine foam;

(2) Scrape the foam obtained in step (1) on a flax woven base cloth with a thickness of 5-8mm, and then send it into the mold. The mold is shaped as a template with hemispherical recesses on the foam surface. 3 -5min pre-solidification, then put the mould into 110℃ steam to vulcanize and solidify for 5-8min, cool down naturally and open the mould to obtain foamed latex base cushion;

(3) Disperse polyurethane glue, silicone powder, glass powder, and ceramic powder uniformly to obtain a wear-resistant adhesive, spray it on the latex surface of the latex base mat obtained in step (2), dry and solidify naturally; apply the hot melt adhesive to hot melt It is applied on the surface of the flax woven base fabric, and is embossed by a pressing roller to form a rubber nail anti-skid surface; a wear-resistant foamed car foot pad is obtained.

In order to obtain good comfort and abrasion resistance of foamed car mats, the present invention foams latex, inorganic fibers, foaming agents, vulcanizing agents, and antioxidants at low speed to form a hair with uniform closed-cell fine foam. The foam body, assisting a certain amount of gelling agent, is coated on the linen base cloth, and the foam is vulcanized and cured on the linen base cloth through hot steam vulcanization to form a foamed latex base pad; it has good resilience and soft comfort; In particular, the polyurethane glue, silicone powder, glass powder, and ceramic powder are dispersed into a spraying liquid and sprayed on the foam layer to make the foam have good water resistance, self-cleaning and abrasion resistance. The car foot pads thus obtained are comfortable, wear-resistant, anti-skid, water-resistant and self-cleaning, and can greatly enhance the sense of decoration and texture of car interiors.

Preferably, the added amount of latex, inorganic fiber, foaming agent, vulcanizing agent, antioxidant, and gelling agent in step (1) is calculated in parts by weight: 60-70 parts by weight of latex, 5-10 parts by weight of inorganic fiber , 0.5-0.7 parts by weight of foaming agent, 0.2-0.3 parts by weight of vulcanizing agent, 0.1-0.3 parts by weight of antioxidant, 1-2 parts by weight of gelling agent.

More preferably, the latex in step (1) is a composite of natural latex with a solid content of 40% and a synthetic latex with a solid content of 60% in a mass ratio of 4:1. Natural latex is the sap produced by the rubber tree. The natural latex undergoes cross-linking reaction and solidifies to become an elastic solid material. It has good biomass characteristics, low allergens, excellent rebound comfort, and stable mechanical properties. However, due to the high cost, the cost can be controlled reasonably by assisting in the synthesis of latex. Preferably, the synthetic latex is styrene butadiene latex.

Further preferably, the inorganic fiber in step (1) is selected from one of wollastonite fiber, glass fiber, and magnesium hydroxide fiber; it is used for the foam not only to reduce the cost, but also to support the foam effectively and effectively prevent the foam from growing. The foam body collapses and deforms during long-term use to improve the abrasion resistance of the foam body.

More preferably, the purpose of using foaming agent in step (1) is to mix latex with air, thereby generating bubbles; soaps and other surfactants can be used as foaming agents. The experiment of this project is provided by Qingdao Ruinuo Chemical Co., Ltd. The carboxylate emulsifier RAYNOL PC-3930 is used as a foaming agent; the foaming agent forms fine and uniform bubbles under low agitation, and they are all closed cells; the fine and uniform closed cells not only make the foam rebound and buffer the effect Good, and will not absorb dirt, does not absorb water, and is easy to clean.

More preferably, the vulcanizing agent in step (1) is dicumyl peroxide or hydroxycumyl peroxide, which can promote the vulcanization and curing of latex at a relatively low temperature.

Further preferably, the antioxidant in step (1) is selected from one of antioxidant 1010 and antioxidant 168.

Natural latex is a material that is easy to solidify when exposed to acid. After natural latex bubbles are added, a certain proportion of acidic substances are added as gelling agents to pre-curing the latex and form stable bubbles. Further preferably, the gelling agent in step (1) is citric acid. Since the latex will gradually solidify after adding citric acid, the gelling agent needs to be added after it is completely foamed. After adding the gelling agent, it should be scraped and used in time, otherwise the uniformity of the scraping will be affected once it has solidified.

Preferably, in step (2), a woven linen fabric is used as the base material of the foot pad. In principle, all kinds of non-woven fabrics, PVC sheets, and woven fabrics can be used as substrates for carrying scrap-coated foams. However, it is necessary to cross-link and vulcanize the foam at 110°C after blade coating. Considering the temperature resistance of the substrate, we chose a woven linen fabric as the substrate of the foot pad. Further, the gram weight of the selected linen woven base fabric is 180 g/m ² , as the base material of the foot pad, it has good compatibility with latex and conformability, and the foot pad is not easy to degummed after washing.

Preferably, the thickness of the squeegee in step (2) is 5-8mm. If the coating is too thick, not only the cost is high, but the deformation of the foot pad is too large, which will affect the accuracy of the driver's operation of the brakes, accelerator, etc., therefore The thickness of the scraped foam should not be too large. If the thickness is too small, the cushioning elasticity will be poor, which will affect the comfort.

Preferably, the height of the pits of the template with hemispherical pits in step (2) is 2mm, and the diameter of the pits is 3-5mm; the pits are formed into convex points by the template of the pits, thereby having good anti-slip properties .

Preferably, in step (3), the polyurethane glue, silicone powder, glass powder, and ceramic powder are uniformly dispersed in a mass ratio of 100:1-2:5-8:3-5;

Preferably, the solid content of the polyurethane glue in step (3) is 15%, the silicone powder, glass powder, and ceramic powder are dispersed in the polyurethane glue, sprayed on the latex surface of the latex base mat, and the coating is formed after natural drying and curing. The layer has good abrasion resistance, slip resistance, hydrophobic and self-cleaning properties; silicone powder has excellent hydrophobicity, in the form of powder in the polyurethane coating, giving the coating hydrophobic and self-cleaning properties; glass powder and ceramic powder are particle sizes Micropowders smaller than 20μm increase the wear resistance of the polyurethane coating in the coating.

Further preferably, in step (3), the spraying thickness of the dispersion composed of polyurethane glue, silicone powder, glass powder, and ceramic powder on the latex surface is 100-200 μm, and it is naturally dried; hot-melt adhesive is applied to the flax weave. The base fabric surface is embossed by a pressing roller to form a rubber nail anti-skid surface; a wear-resistant foamed car foot pad is obtained.

Preferably, the hot-melt adhesive in step (3) is EVA, which can be hot-melted at a lower temperature; the coating thickness on the surface of the linen woven base fabric is 0.5-1mm; the glue nails are formed by embossing by pressing rollers Anti-slip surface: This surface is in direct contact with the vehicle ground, has good adhesion, and effectively prevents the sliding of the foot pad.

Furthermore, the present invention provides a wear-resistant foamed car foot pad prepared by the above method. In order to obtain a comfortable, non-slip, and wear-resistant car foot pad, the present invention takes advantage of the easy foaming characteristics of latex, disperses inorganic fibers in it, and adds foaming agents, vulcanizing agents, and antioxidants for low-speed stirring and foaming to form The foam of uniform closed-cell fine foam, assisting a certain amount of gelling agent, is coated on the linen base cloth, and the foam is cured on the linen base cloth through hot steam vulcanization to form a foamed latex base cushion; The base cushion is flexible and comfortable; further, disperse polyurethane glue, silicone powder, glass powder, and ceramic powder into a spray liquid, spray it on the foam layer, so that the foam has good water resistance and self-resistance. Cleanliness and wear resistance. The car foot pads thus obtained are comfortable, wear-resistant, anti-skid, water-resistant and self-cleaning, which greatly improves the sense of decoration and texture of the car interior.

Compared with the prior art, the present invention has excellent effects embodied in:

(1) Taking advantage of the easy foaming characteristics of latex, disperse inorganic fibers in it, and add foaming agent, vulcanizing agent, and antioxidant to stir and foam at low speed, thereby forming a foam with uniform closed-cell fine foam, assisting a certain amount of The gelling agent is coated on the linen base cloth, and the foam is vulcanized and cured on the linen base cloth through hot steam vulcanization to form a foamed latex base cushion; a base cushion with good resilience and soft comfort is obtained.

(2) Disperse polyurethane glue, silicone powder, glass powder, and ceramic powder as spraying liquid, spray it on the foam layer, so that the foam has good water resistance, self-cleaning and abrasion resistance.

(3) The present invention uses latex reasonably in car mats, and through foaming and wear-resistant treatments, the mats have excellent cushioning, abrasion resistance, and water resistance, and the feet are soft and have a texture when stepping on them, which is useful for improving the car. The interior quality effect is significant, and the cost will not increase significantly.

Description of the drawings

The present invention will be further explained below in conjunction with the accompanying drawings:

Figure 1 is a schematic diagram of the structure of a wear-resistant foamed car foot pad of the present invention. Among them: 1- linen woven base fabric; 2- rubber nails; 3- latex foam; 4- wear-resistant adhesive layer.

detailed description

The present invention will be further explained by specific embodiments below. The following examples are preferred and specific embodiments of the present invention, but the embodiments of the present invention are not limited by the following examples.

Example one

(1) Mix natural latex with a solid content of 40% and a styrene-butadiene latex with a solid content of 60% in a mass ratio of 4:1, weigh 60kg, add it to a mixer, and then add 5kg of magnesium hydroxide inorganic fiber and 0.5kg of foaming agent ( RAYNOL PC-3930 provided by Qingdao Ruinuo Chemical Co., Ltd., 0.3 kg of vulcanizing agent dicumyl peroxide, 0.1 kg of antioxidant 1010, stirring at 40 rpm for 10 minutes, the latex foamed to form uniform fine foam, and then 1 kg of glue was added As the coagulant citric acid, continue to stir for 1 min to obtain a foam with uniform fine foam;

(2) Scrape the foam obtained in step (1) as soon as possible on ^{a woven linen fabric with a grammage of 180g/m 2} , with a thickness of 5mm, and then send it into the mold. The mold has a hemispherical shape on the surface of the foam. The template of the concave point, the height of the concave point of the concave point template is 2mm, and the diameter of the concave point is 3mm; the foam is formed into convex points through the concave point template, so that it has good anti-slip properties; the shape is pre-solidified for 5 minutes, and then the mold Vulcanize and solidify for 8 minutes in steam at 110°C, cool naturally, and open the mold to obtain foamed latex base cushion;

(3) Polyurethane glue with a solid content of 15%, silicone powder, glass powder with a particle size of less than 20μm, and ceramic powder with a particle size of less than 20μm are uniformly dispersed in a mass ratio of 100:1:5:5 to obtain a wear-resistant glue. Spray on the latex surface of the latex base mat obtained in step (2), and the spray thickness is 100μm to dry and solidify naturally; the EVA hot-melt adhesive is hot-melt coated on the surface of the linen woven fabric, and the coating thickness is 1mm. The flower forms a rubber nail non-slip surface; a wear-resistant foamed car mat is obtained.

Example two

(1) Mix natural latex with a solid content of 40% and a styrene-butadiene latex with a solid content of 60% in a mass ratio of 4:1, weigh 65kg, add it to the mixer, and then add 10kg of glass fiber and 0.7kg of foaming agent (Qingdao Reno RAYNOL PC-3930 provided by Chemical Co., Ltd., 0.3kg vulcanizing agent dicumyl peroxide, 0.2kg antioxidant 1010, stirring at 50rpm for 10min, the latex foamed to form uniform fine foam, and then 2kg gelling agent lemon was added Acid, continue to stir for 1 min to obtain a foam containing uniform fine foam;

(2) The step (1) in foam obtained knife grammage of 180g / m ² of fabric prepared flax, blade thickness of 6mm, and then into the mold, the mold having a foam surface on the hemispherical concave Point template, the height of the concave point of the concave point template is 2mm, and the diameter of the concave point is 5mm; the foam is formed into convex points through the concave point template, so that it has good anti-slip properties; the shape is pre-solidified for 5 minutes, and then the mold is sent Vulcanize and solidify in steam at 110°C for 8 minutes, cool down naturally, and open the mold to obtain a foamed latex base cushion;

(3) Polyurethane glue with a solid content of 15%, silicone powder, glass powder with a particle size of less than 20μm, and ceramic powder with a particle size of less than 20μm are uniformly dispersed in a mass ratio of 100:2:8:4 to obtain a wear-resistant glue. Spray on the latex surface of the latex base mat obtained in step (2), and the spray thickness is 150μm to dry and solidify naturally; the EVA hot melt adhesive is hot melt coated on the surface of the linen woven fabric, the coating thickness is 1mm, and it is pressed by a roller. The flower forms a rubber nail non-slip surface; a wear-resistant foamed car mat is obtained.

Example three

(1) Mix natural latex with a solid content of 40% and a styrene-butadiene latex with a solid content of 60% at a mass ratio of 4:1, weigh 70kg, add it to the mixer, and then add 8kg of wollastonite fiber and 0.5kg of foaming agent (Qingdao) RAYNOL PC-3930 provided by Rui Nuo Chemical Co., Ltd., 0.3 kg of vulcanizing agent hydroxycumene peroxide, 0.1 kg of antioxidant 1010, stirred at 50 rpm for 8 minutes, the latex foamed to form uniform fine foam, and then 1 kg of gelling was added Add citric acid and continue to stir for 1 min to obtain a foam with uniform fine foam;

(2) Scrape the foam obtained in step (1) ^{on a woven linen base cloth with a grammage of 180g/m 2} , with a thickness of 8mm, and then send it to the mold. The mold has a hemispherical recess on the foam surface. Point template, the height of the concave point of the concave point template is 2mm, and the diameter of the concave point is 3mm; through the concave point template, the foam is formed into convex points, which has good anti-slip properties; the shape is pre-solidified for 5 minutes, and then the mold is sent Vulcanize and solidify in steam at 110°C for 8 minutes, cool down naturally, and open the mold to obtain a foamed latex base cushion;

(3) Polyurethane glue with a solid content of 15%, silicone powder, glass powder with a particle size of less than 20μm, and ceramic powder with a particle size of less than 20μm are uniformly dispersed in a mass ratio of 100:1:6:5 to obtain a wear-resistant glue. Spray on the latex surface of the latex base mat obtained in step (2), and the spray thickness is 200μm to dry and solidify naturally; the EVA hot melt adhesive is hot-melt coated on the surface of the linen woven fabric, the coating thickness is 1mm, and it is pressed by a pressing roller. The flower forms a rubber nail non-slip surface; a wear-resistant foamed car mat is obtained.

Comparative example one

(3) The polyurethane glue and silicone powder with a solid content of 15% are uniformly dispersed at a mass ratio of 100:1 to obtain a wear-resistant glue, and sprayed on the latex surface of the latex base mat obtained in step (2), with a spray thickness of 100μm. Drying and curing; hot-melt coating EVA hot-melt adhesive on the surface of the flax woven base fabric with a coating thickness of 1 mm, and embossing by a pressing roller to form a rubber nail anti-skid surface; a wear-resistant foamed car foot pad is obtained.

In Comparative Example 1, glass powder and ceramic powder were not added to the polyurethane glue, which affected the abrasion resistance of the foot pad.

Comparative example two

(2) Scrape the foam obtained in step (1) as soon as possible on ^{a woven linen fabric with a grammage of 180g/m 2} , with a thickness of 5mm, and then send it into the mold. The mold has a hemispherical shape on the surface of the foam. The template of the concave point, the height of the concave point of the concave point template is 2mm, and the diameter of the concave point is 3mm; through the concave point template, the foam is formed into convex points, which has good anti-skid properties; the shape is pre-solidified for 5 minutes, and then the mold Vulcanize and solidify for 8 minutes in steam at 110°C, cool naturally and open the mold to obtain foamed latex base pad;

(3) Polyurethane glue with a solid content of 15%, glass powder with a particle size of less than 20μm, and ceramic powder with a particle size of less than 20μm are uniformly dispersed at a mass ratio of 100:5:5 to obtain a wear-resistant glue, which is sprayed in step (2) The latex surface of the obtained latex base mat was sprayed with a thickness of 100μm and dried and cured naturally; the EVA hot melt adhesive was hot-melt coated on the surface of the linen woven fabric, the coating thickness was 1mm, and the rubber nail anti-skid surface was formed by embossing by pressing rollers ; Obtain a wear-resistant foam car mat.

In Comparative Example 2, no silicone powder was added to the wear-resistant adhesive, which affected the wear resistance and self-cleaning properties of the foot pad.

Comparative example three

(2) Scrape the foam obtained in step (1) as soon as possible on ^{a woven linen fabric with a grammage of 180g/m 2} , with a thickness of 5mm, and then send it into the mold. The mold has a hemispherical shape on the surface of the foam. The template of the concave point, the height of the concave point of the concave point template is 2mm, and the diameter of the concave point is 3mm; the foam is formed into convex points through the concave point template, so that it has good anti-slip properties; the shape is pre-solidified for 5 minutes, and then the mold Vulcanize and solidify for 8 minutes in steam at 110°C, cool naturally and open the mold to obtain foamed latex base pad;

(3) Hot-melt coating of EVA hot-melt adhesive on the surface of the flax woven base fabric with a coating thickness of 1 mm, and embossing by a pressing roller to form a rubber nail anti-skid surface; a wear-resistant foamed car foot pad is obtained.

Comparative Example 3 is not sprayed with wear-resistant glue, which affects the wear resistance and self-cleaning properties of the foot pad.

Comparative example four

(1) Mix natural latex with a solid content of 40% and a styrene-butadiene latex with a solid content of 60% at a mass ratio of 4:1, weigh 60kg, add it to a mixer, then add 5kg of magnesium hydroxide inorganic fiber, and add 0.3kg of vulcanizing agent. Dicumyl oxide, 0.1kg antioxidant 1010, stir at 40rpm for 10min, then add 1kg gelling agent citric acid, continue stirring for 1min;

(2) The step (1) in the knife as soon as the material obtained grammage of 180g / m ² of fabric prepared flax, blade thickness of 5mm, and then into the mold, the mold surface is on a latex having a hemispherical pits Template, the height of the concave point of the concave point template is 2mm, and the diameter of the concave point is 3mm; through the concave point template, the latex is formed into convex points, which has good anti-slip properties; the mold is pre-solidified for 5 minutes, and then the mold is sent to 110°C steam Middle vulcanization and solidification for 8 minutes, natural cooling and mold opening to obtain latex base mat;

(3) Polyurethane glue with a solid content of 15%, silicone powder, glass powder with a particle size of less than 20μm, and ceramic powder with a particle size of less than 20μm are uniformly dispersed in a mass ratio of 100:1:5:5 to obtain a wear-resistant glue. Spray on the latex surface of the latex base mat obtained in step (2), and the spray thickness is 100μm to dry and solidify naturally; the EVA hot-melt adhesive is hot-melt coated on the surface of the linen woven fabric, and the coating thickness is 1mm. The flower forms a rubber nail anti-skid surface; a wear-resistant car mat is obtained.

In Comparative Example 4, latex was not foamed, and the cushioning comfort of the obtained foot pad was poor.

Comparative example five

(1) Mix natural latex with a solid content of 40% and a styrene-butadiene latex with a solid content of 60% at a mass ratio of 4:1, weigh 60kg, add it to a mixer, and then add 0.5kg of foaming agent (provided by Qingdao Reno Chemical Co., Ltd. RAYNOL PC-3930), 0.3 kg of vulcanizing agent dicumyl peroxide, 0.1 kg of antioxidant 1010, stirring at 40 rpm for 10 minutes, the latex foams to form uniform fine foam, then 1 kg of gelling agent citric acid is added, and the stirring is continued 1min, get a foam containing uniform fine foam;

In Comparative Example 5, inorganic fiber was not added as the support of the foam, which affects the wear resistance on the one hand, and on the other hand, the foot pad is easily deformed when pressed for a long time.

The performance test of the foot pad is as follows:

1. Abrasion resistance test:

Because the wear resistance of the foot pad of the present invention is improved by adding silicone powder, glass powder, and ceramic powder to polyurethane glue as a wear-resistant coating. Therefore, refer to GB/T 23988-2009 "Abrasion Resistance Measurement of Coatings-Falling Sand Method" to measure the abrasion resistance by the friction of falling standard sand on the coating. Specifically, the standard amount of sand required to wipe off the unit thickness is used as the constant amount of wear resistance. The more sand used per unit thickness, the better the wear resistance. Standard sand with a mud content of 0.2% was used in the test. The specific test data is shown in Table 1.

2. Anti-slip performance test:

The cut sample is 297×210mm as the test sample. After fixing, a 2kg weight is applied on the surface, and the weight is pulled at a rate of 100mm/min for a distance of 100mm. The sliding friction force is displayed by the pulling force, as shown in Table 1. The greater the sliding friction, the better the anti-skid performance.

3. Water resistance and self-cleaning test:

Prepare 50ml of vegetable oil, 0.5kg of soil, and 3000ml of water as simulated dirt (contains water and sand), pour it on the foot pad, let the dirt stay on the foot pad for 4 hours, then shake off the dirt naturally, and observe that the dirt adheres to the feet The pad condition and shaking off condition are shown in Table 1.

Table 1:

4. Resilience test:

Cut the foot pads, measure the initial thickness as h ₀ , and then apply 50kg of gravity per square decimeter (generally the weight per unit area in a car), and the thickness of the foot pads after applying pressure is counted as h ₁ ; after applying pressure for 2 hours, remove the pressure, The thickness of the foot pad after recovery is counted as h ₂ , as shown in Table 2.

Table 2:

检测项目Test items	h ₀(mm) h ₀ (mm)	h ₁(mm) h ₁ (mm)	h ₂(mm) h ₂ (mm)
实施例一Example one	8.58.5	5.35.3	8.58.5
实施例二Example two	9.29.2	5.35.3	8.58.5
实施例三Example three	11.211.2	5.35.3	8.58.5
对比例一Comparative example one	8.58.5	5.35.3	8.58.5
对比例二Comparative example two	8.58.5	5.35.3	8.58.5
对比例三Comparative example three	8.48.4	5.05.0	8.48.4
对比例四Comparative example four	8.58.5	7.67.6	7.87.8
对比例五Comparative example five	8.58.5	4.64.6	7.17.1

Through the above tests, the foot pad obtained by the present invention has good water resistance, self-cleaning properties, abrasion resistance and cushioning resilience. The overall performance is better, through the latex closed-cell foaming treatment, inorganic fiber support foaming; silicone powder, glass powder, ceramic powder to improve the coating wear resistance and hydrophobic self-cleaning, making the foot pad not only soft but also The texture is easy to clean, which has a significant effect on improving the quality of car interiors, and the cost will not increase significantly.

It should be understood that the exemplary embodiments described herein should be considered illustrative and not restrictive. Moreover, the description of each feature or aspect in each embodiment should be applicable to other similar features or aspects in other embodiments.

Claims

A method for preparing wear-resistant foamed car foot pads is characterized in that the specific preparation method is as follows:

(1) Add the latex, inorganic fiber, foaming agent, vulcanizing agent, and antioxidant to the mixer, stir at 40-50rpm for 5-10min, the latex foams to form uniform fine foam, then add the gelling agent, continue to stir 1- 2min, get a foam with uniform fine foam;

(2) Scrape the foam obtained in step (1) on a flax woven base cloth with a thickness of 5-8mm, and then send it into the mold. The mold is shaped as a template with hemispherical recesses on the foam surface. 3 -5min pre-solidification, then put the mould into 110℃ steam to vulcanize and solidify for 5-8min, cool down naturally and open the mould to obtain foamed latex base cushion;

(3) Disperse polyurethane glue, silicone powder, glass powder, and ceramic powder uniformly to obtain a wear-resistant adhesive, spray it on the latex surface of the latex base mat obtained in step (2), dry and solidify naturally; apply the hot melt adhesive to hot melt It is applied on the surface of the flax woven base fabric, and is embossed by a pressing roller to form a rubber nail anti-skid surface; a wear-resistant foamed car foot pad is obtained.
The method for preparing wear-resistant foamed car mats according to claim 1, characterized in that: the added amount of the latex, inorganic fiber, foaming agent, vulcanizing agent, antioxidant, and gelling agent in step (1) In parts by weight: 60-70 parts by weight of latex, 5-10 parts by weight of inorganic fibers, 0.5-0.7 parts by weight of foaming agent, 0.2-0.3 parts by weight of vulcanizing agent, 0.1-0.3 parts by weight of antioxidant, and gelling agent 1 -2 parts by weight.
The method for preparing wear-resistant foamed car mats according to claim 1, characterized in that: in step (1), the latex is natural latex with a solid content of 40% and a synthetic latex with a solid content of 60% in a mass ratio of 4 :1 composite; the inorganic fiber is selected from wollastonite fiber, glass fiber, and magnesium hydroxide fiber; the foaming agent is selected from the carboxylate emulsifier RAYNOL PC- provided by Qingdao Ruinuo Chemical Co., Ltd. 3930; the vulcanizing agent is one of dicumyl peroxide and hydroxycumene peroxide; the antioxidant is one of antioxidant 1010 and antioxidant 168; the gelling agent is citric acid .
The method for preparing wear-resistant foamed car foot pads according to claim 1, characterized in that: step (2) uses a linen woven base cloth as the base material of the foot pad, and the weight of the selected linen woven base cloth is 180g/ m 2 .
The method for preparing wear-resistant foamed car mats according to claim 1, characterized in that: in step (2), the height of the dents of the template with hemispherical dents is 2mm, and the diameter of the dents is 3-5mm. .
The method for preparing wear-resistant foamed car mats according to claim 1, characterized in that: in step (3), the mass ratio of polyurethane glue, silicone powder, glass powder, and ceramic powder is 100:1 to 2:5. -8:3-5 evenly dispersed.
The method for preparing wear-resistant foamed car floor mats according to claim 1, characterized in that: the solid content of the polyurethane glue in step (3) is 15%; the glass powder and ceramic powder have a particle size of less than 20 μm的微粉.
The method for preparing wear-resistant foamed car foot pads according to claim 1, characterized in that: in step (3), the spray thickness of the dispersion of polyurethane glue, silicone powder, glass powder, and ceramic powder on the latex surface It is 100-200μm.
The method for preparing wear-resistant foamed car foot pads according to claim 1, characterized in that: preferably, the hot melt adhesive in step (3) is selected from EVA; the coating thickness on the linen woven base fabric surface is 0.5-1mm.
A wear-resistant foamed car foot pad obtained by the preparation method of any one of claims 1-9.