WO2021243749A1

WO2021243749A1 - Double face leather-integrated composite material and preparation method therefor

Info

Publication number: WO2021243749A1
Application number: PCT/CN2020/096050
Authority: WO
Inventors: 杨乐; 王永刚; 周晓辉; 张新平; 李海林
Original assignee: 焦作隆丰皮草企业有限公司
Priority date: 2020-06-04
Filing date: 2020-06-15
Publication date: 2021-12-09
Also published as: CN111519446A

Abstract

Provided by the present invention is a double face leather-integrated composite material, comprising a coating film; a primer layer compounded on the coating film; a base material compounded on the primer layer; an adhesive layer compounded on the base material; a braided layer which has a batt layer and which is compounded on the adhesive layer, wherein the adhesive layer is compounded on a braided surface of the braided layer that has the batt layer; or a double face genuine leather-integrated layer compounded on the adhesive layer, wherein the adhesive layer is compounded on a skin layer of the double face genuine leather-integrated layer. The double face leather-integrated composite material provided by the present invention has a coating thickness that may be controlled at the micron level, and the board surface style may achieve any texture or visual effect. At the same time, the product has good physical properties, good quality stability and consistency, a simple production process, and high environmental protection efficiency, and is green and sustainable, and suitable for large-scale production, promotion and application.

Description

Hair and leather integrated composite material and preparation method thereof

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 4, 2020, the application number is 202010500898.4, and the invention title is "a hair-leather integrated composite material and its preparation method", the entire content of which is incorporated by reference In this application.

Technical field

The invention belongs to the technical field of hair leather processing and processing, and relates to a hair leather integrated composite material and a preparation method thereof, a real hair leather integrated composite material and a preparation method thereof.

Background technique

The processing of wool leather has a history of thousands of years. After a long period of development, the processing of wool leather has developed from the original simple manual operation to an important industrial technology field. The one-sided fur and leather refers to leather with fur on one side (hair leather) obtained by tanning, dyeing and finishing animal skins with fur. The fur leather is composed of two parts, a fur quilt and a leather board. The fur quilt refers to the side with animal hair, and the leather board is the leather surface with natural grain and luster.

Due to the scarcity and price factors of the integrated materials of wool and leather, the integrated materials of wool and leather on the market are mainly divided into two categories. The processing technology and product characteristics of the two types of products are as follows:

1. Really natural hair leather integrated material: it is a suede-style hair leather integrated material using natural fur (such as sheep skin or lamb skin, etc.) through traditional tanning, dyeing, mechanical processing, etc. The traditional spray gun machine sprays and finishes the method to make the smooth effect kind of hair leather integrated product, as the hair leather for boots, clothing and other purposes. However, as mentioned above, the traditional smooth surface production method, the process is complex and intelligent production is low, the physical properties of the product such as color fastness, abrasion resistance and other indicators are poor, the product has problems such as color difference, and its further improvement is the traditional processing technology. A bottleneck that is difficult to break through.

2. Wool-like integrated material: The artificial wool knitted fabric is used as the base material, and the solvent-based polyurethane coating layer is directly made on the base fabric surface to form the integrated wool-like material. Because it is directly coated with PU on the base fabric surface of the artificial woven wool, its fabric structure is grid-like and not tight and flat. Therefore, in order to achieve a firm and tight combination of the PU coating layer and the leather surface effect, the coating The thickness is basically in the range of 0.2-0.5mm, and the thickness is relatively thick. Compared with the one-piece material of real hair leather, the touch and softness of the hand feel are much worse. Moreover, the solvent-based polyurethane coating layer is also difficult to achieve the current technical concept of environmentally friendly and recyclable production.

Therefore, how to find a suitable composite material of wool and leather to solve the above-mentioned problems in the prior art, and have a simpler processing method, which is convenient for industrialization and application, has become an urgent need for many front-line researchers and R&D enterprises in the industry. One of the problems solved.

Summary of the invention

In view of this, the technical problem to be solved by the present invention is to provide a hair and leather integrated composite material and a preparation method thereof, in particular a hair and leather integrated composite material with high physical properties and a preparation method thereof. The hair-leather integrated composite material provided by the present invention has a specific composition and layer structure, so that it can also use natural fur or artificial wool knitted fabric as raw materials, and the coating thickness can be controlled at the micron level, and the board surface style can achieve any pattern or Visual effect, at the same time, the product properties are good, the quality stability and consistency are good, the production process is simple, the efficiency is high, the environmental protection is green and sustainable, and it is suitable for large-scale production promotion and application.

The present invention provides a hair-leather integrated composite material, including:

Coating film

A primer layer compounded on the coating film;

A substrate compounded on the undercoat layer;

An adhesive layer compounded on the substrate;

A braided fabric layer with a batt layer compounded on the adhesive layer, and the adhesive layer is compounded on the braided fabric surface of the braided fabric layer with a batt layer;

Or a dermal hair integrated layer compounded on the adhesive layer, and the adhesive layer is compounded on the skin layer of the dermal hair integrated layer.

Preferably, the coating film includes a water-based polyurethane resin coating film;

The thickness of the coating film is 4-50 μm;

The coating film is a microporous film.

Preferably, the material of the coating film includes water-based polyurethane resin, polyurethane dispersion and water-soluble synthetic resin;

The material of the coating film also includes one or more of a hand-feeling wax agent, a pigment paste and a leveling agent.

Preferably, the material of the coating film, based on the mass percentage of the raw material, includes:

Preferably, the primer layer includes a water-based polyurethane primer layer;

The roll coating amount of the primer layer is 2.1-2.5 g/SF.

Preferably, the material of the primer layer includes polyurethane dispersion and water-based polyurethane resin;

The material of the primer layer also includes a cross-linking agent and/or a pigment paste.

Preferably, the material of the primer layer, calculated as a percentage of the mass of the raw material, includes:

Preferably, the thickness of the substrate is 0.3-0.8 mm;

The substrate is a fabric substrate with a dense structure and a smooth surface;

The base material is a base material with fiber extensibility, compactness, and napness.

Preferably, the material of the substrate includes suede and/or Lycra fabric;

The weight of the suede is 180-240 g/m ² .

Preferably, the adhesive layer includes a PUR hot melt adhesive adhesive layer;

The peel strength of the adhesive layer is greater than 0.5Kg/cm.

Preferably, the knitted fabric layer with a batt layer is specifically a knitted fabric layer with a batt layer;

The thickness of the braid layer is 0.4-1 mm.

Preferably, the material of the woven fabric layer includes one or more of cotton yarn, hemp yarn, rayon fiber, acrylic fiber, woolen thread and polyester yarn;

The material of the wool layer includes artificial wool and/or real wool.

Preferably, the other surface of the finishing film opposite to the primer layer has a profiled texture;

The profiling pattern is obtained by rolling a patterned release paper.

Preferably, the thickness of the skin layer of the dermis and hair integrated layer is 0.2 to 1 mm;

The skin layer of the dermis and hair integrated layer is the skin layer after the skin is thinned;

The skin layer of the dermis and hair integrated layer contains a grain layer fiber structure;

The skin layer of the dermis and hair integrated layer does not include the fiber structure of the reticular layer.

The present invention provides a real hair leather integrated composite material, including:

Coating film

A primer layer compounded on the coating film;

An isolation layer compounded on the primer layer;

An integrated layer of dermis and hair compounded on the isolation layer;

The isolation layer is compounded on the skin layer of the dermis and hair integrated layer.

Preferably, the undercoating layer includes an aqueous polyurethane resin undercoating layer;

The material of the primer layer, calculated as a percentage of the mass of the raw material, includes:

Preferably, the isolation layer is an isolation layer used to seal the dermis and hair integrated layer;

The isolation layer includes a waterproof material isolation layer.

Preferably, the material of the isolation layer is butyl ester;

The spraying amount of the isolation layer is 25-35 g/SF.

The present invention also provides a method for preparing a hair-leather integrated composite material, which includes the following steps:

1) After bonding the woven fabric or leather wool integrated material with the batt layer and the base material through an adhesive, a composite material with a base material backing is obtained;

2) After the base coating is compounded on the substrate surface of the composite material with a substrate backing obtained in the above steps, the semi-finished product is obtained after baking;

3) After the coating film surface of the release paper coated with the coating film and the primer layer of the semi-finished product obtained in the above steps are ironed and bonded, and then baked again, a leather-integrated composite material is obtained.

Preferably, the substrate is a fabric substrate with a dense structure and a smooth surface;

The substrate is a substrate with fiber extensibility, compactness and napness;

The material of the substrate includes suede and/or Lycra fabric;

The weight of the suede is 180-240 g/m ² .

Preferably, the bonding speed is 3.5-4.5m/min;

The bonding pressure is 50-100kg/cm ² ;

The bonding temperature is 135-145°C;

The peel strength of the adhesive glue after bonding is greater than 0.5Kg/cm.

Preferably, the composite primer layer is specifically a spray primer layer;

The spray amount of the primer layer is 2.1～2.5g/SF;

The temperature of the baking is 90-100°C;

The baking time is 1 to 2 minutes.

Preferably, the undercoat layer, in terms of the mass percentage of the raw material, includes:

Preferably, the release paper coated with a coating film is specifically obtained by the following steps:

Coating raw materials for the coating film on the release paper, and forming a coating film on the release paper after baking;

The coating film, calculated as a percentage of the mass of raw materials, includes:

Preferably, the temperature of the ironing and bonding is 120-140°C;

The ironing and bonding speed is 3.5-4.5m/min;

The ironing and bonding pressure is 30-40 kg/cm ² .

Preferably, the temperature of the re-baking is 70-80°C;

The time for the re-baking is 3 to 5 minutes.

The present invention provides a hair-leather integrated composite material, including a coating film; a primer layer compounded on the coating film; a substrate compounded on the primer layer; an adhesive compound on the substrate Layer; a braided fabric layer with a batt layer composited on the bonding layer, the bonding layer is composited on the braided surface of the braided fabric layer with a batt layer; or composited on the bonding An integrated layer of dermis and hair on the layer, and the adhesive layer is compounded on the skin layer of the integrated layer of dermis and hair. Compared with the prior art, the present invention is aimed at the existing integrated material of fur and leather. The integrated material of real natural fur and leather has complex smooth surface production process and low degree of intelligent production, and the physical properties of the product such as color fastness, abrasion resistance, etc. The index is poor, and the product has problems such as color difference; while the artificial leather integrated material is thicker, and compared with the real leather integrated material, the touch and softness of the hand feel are poor. And the production process is not environmentally friendly.

The present invention provides a new integrated composite material of wool and leather with specific structure and composition, which can be realized through creative selection and improvement of process and raw materials. On the one hand, the present invention can be based on natural fur as the raw material for the skin layer and wool layer, on the other hand, it can also use the artificial wool knitted fabric as the skin layer and wool layer, processed by coating technology using water-based coating materials, and the coating thickness range can be controlled at the micron level , And have different board effects and styles of leather integrated materials, the board style can achieve any texture or visual effect, such as the current new material carbon fiber, optical effect fabrics and other styles. In the present invention, the knitted fabric and the wool layer or the dermal wool layer are attached to the substrate fabric, and the original softness of the knitted wool is not affected, and the formation has the same characteristics as the natural leather embryo board surface, and has certain fiber extensibility and compactness. And pile-like backing, so that a micron-level finishing layer can be made on it.

In the integrated composite material of hair and leather provided by the present invention, the coating thickness can be controlled at the micron level, the board surface style can achieve any texture or visual effect, at the same time, the product physical index is good, the quality stability and consistency are good, the production process is simple, and the environmental protection efficiency High, green and sustainable, suitable for large-scale production promotion and application.

The hair-leather integrated composite material provided by the present invention has been tested by standard methods and has excellent physical performance indicators. The color fastness to rubbing (50 dry rubbing) can reach 4.5, the color fastness to PVC migration can reach 4.0, and the resistance to tortuosity (dry rubbing) ) It can reach 125,000 times, the tortuous (wet) resistance can reach 20,000 times, and the Taber wear resistance (H22) can reach 100 times without abrasion.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the hair-leather integrated composite material provided by the present invention;

Figure 2 is a schematic diagram of the process flow of the method for preparing the wool-leather integrated composite material provided by the present invention;

Fig. 3 is a schematic diagram of the process flow of the preparation method of the real hair leather integrated composite material provided by the present invention.

detailed description

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

All the raw materials of the present invention have no special restrictions on their sources, and they can be purchased on the market or prepared according to conventional methods well known to those skilled in the art.

The purity of all raw materials of the present invention is not particularly limited, and the present invention preferably adopts industrial purity or conventional purity used in the field of wool leather preparation.

All the raw materials of the present invention, their brand names and abbreviations belong to the conventional brand names and abbreviations in the field. Each brand and abbreviation are clearly defined in the field of its related use. Those skilled in the art can, according to the brand names, abbreviations and corresponding uses, It can be purchased from the market or prepared by conventional methods.

The abbreviations of all the processes of the present invention belong to conventional abbreviations in the field, and each abbreviation is clearly defined in the field of its related use, and those skilled in the art can understand the conventional process steps according to the abbreviations.

Coating film

A primer layer compounded on the coating film;

A substrate compounded on the undercoat layer;

An adhesive layer compounded on the substrate;

In principle, the present invention has no special restrictions on the thickness of the coating film. Those skilled in the art can make selections and adjustments according to actual application conditions, product requirements and quality requirements. The high-grade coating layer has the characteristics more consistent with the natural skin embryo board surface, and can also realize diversified board surface styles. The thickness of the coating film is preferably 4-50μm, more preferably 5-40μm, and more preferably 6 ~30μm, more preferably 7-20μm, more preferably 8-15μm.

In principle, the present invention has no special restrictions on the material of the coating film. Based on the same principle as described above, the material of the coating film is preferably a water-based polyurethane material, that is, a water-based polyurethane resin coating film, and more preferably includes a water-based polyurethane resin and a polyurethane dispersion. And one or more of water-soluble composite resins, more preferably water-based polyurethane resins, polyurethane dispersions, and water-soluble composite resins. The material of the coating film of the present invention preferably further includes one or more of hand-feeling wax, pigment paste and leveling agent, more preferably multiple of hand-feeling wax, pigment paste and leveling agent. The coating film of the present invention has the advantages of good leveling, strong hiding power, strong adhesion, flexibility, wear resistance, cold resistance and heat resistance of the coating, and the wool leather treated by the coating film feels soft, smooth and plump. , Bright, strong leather feeling.

More specifically, the coating film, based on the mass percentage of the raw material, preferably includes:

The total content of the raw materials of the coating film of the present invention satisfies 100%.

In principle, the present invention does not specifically limit the mass percentage of the water-based polyurethane resin. Based on the same principle as described above, the mass percentage of the water-based polyurethane resin preferably includes 25%-30%, more preferably 26%-29%, and more preferably It is 27%-28%. Wherein, the water-based polyurethane resin has elasticity, good covering properties and uniform surface filling properties. The water-based polyurethane resin is preferably water-based polyurethane resin 1225, and specifically may be water-based polyurethane resin 1225 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention has no particular limitation on the mass percentage of the polyurethane dispersion. Based on the same principle as described above, the mass percentage of the polyurethane dispersion preferably includes 20%-25%, more preferably 21%-24%, and more preferably It is 22% to 23%. Wherein, the polyurethane dispersion is transparent and colorless, medium soft and strong in binding force. The polyurethane dispersion is preferably a polyurethane dispersion 127, and specifically may be a polyurethane dispersion 127 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not specifically limit the mass percentage of the water-soluble composite resin RC-2349. Based on the same principle as described above, the mass percentage of the water-soluble composite resin RC-2349 preferably includes 15%-20%, more preferably 16% to 19%, more preferably 17% to 18%. Wherein, the water-soluble composite resin RC-2349 is preferably the water-soluble composite resin RC-2349 produced by Stahl Leather Chemical Co., Ltd. The water-soluble synthetic resin RC-2349 has natural leather gloss and feel, is thin and fine, and has good extensibility.

In principle, the present invention does not particularly limit the mass percentage of the hand-feeling wax agent. Based on the same principle as described above, the mass percentage of the hand-feeling wax agent preferably includes 3% to 5%, more preferably 3.3% to 4.7%, and more preferably It is 3.6% to 4.4%, more preferably 3.9% to 4.1%. Wherein, the hand-feel wax agent has good transparency, can improve the scratch resistance and abrasion resistance of the coating film, and maintain the long-lasting smooth hand feeling of the coating film. The hand-feeling wax agent is preferably a hand-feeling wax agent 253, and specifically can be a hand-feeling wax agent 253 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not specifically limit the mass percentage of the pigment paste. Based on the same principle as described above, the mass percentage of the pigment paste preferably includes 10%-15%, more preferably 11%-14%, and more preferably 12%. %～13%. Wherein, the pigment paste is used for coloring, has bright color and certain air permeability. The pigment paste is preferably pigment paste 780, and specifically may be pigment paste 780 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not specifically limit the mass percentage of the leveling agent. Based on the same principle as described above, the mass percentage of the leveling agent is preferably 0.15% to 0.25%, more preferably 0.17% to 0.32%, more preferably It is 0.2% to 0.3%, more preferably 0.25% to 0.3%. Wherein, the leveling agent is preferably a leveling agent H, and specifically may be a leveling agent H produced by Lanxess Chemical Co., Ltd.

In principle, the present invention does not particularly limit the specific structure of the coating film. Based on the same principle as described above, the coating film is preferably a microporous film. The coating film of the present invention is baked at high temperature during the molding process, and the excess water inside the coating film is quickly volatilized in the form of water vapor, thereby forming a microporous structure on the coating film, thereby ensuring that the material as a whole has certain air permeability properties.

In principle, the present invention does not specifically limit the roll coating amount of the primer layer. Based on the same principle as described above, the roll coating amount of the primer layer is preferably 2.1 to 2.5 g/SF, more preferably 2.2 to 2.4 g/SF. SF is more preferably 2.3 to 2.5 g/SF.

In principle, the present invention has no special restrictions on the material of the primer layer. Based on the same principle as described above, the primer layer is used to bond the substrate and the coating film, and the substrate and the coating film The material is different and cannot be bonded by general glues. Through the primer layer, the substrate and the coating film can be bonded together well. The material of the primer layer preferably includes a polyurethane material, more preferably a water-based polyurethane primer layer, more preferably a water-based polyurethane material, and the primer layer has better adhesive properties. The primer layer is sprayed on the surface of the base material close to the coating film by spraying the water-based polyurethane material with a spray gun, and is formed by baking in an oven.

More specifically, the primer layer, calculated as a percentage by mass of the raw material, preferably includes:

The total content of the raw materials of the undercoat layer of the present invention satisfies 100%.

In principle, the present invention does not particularly limit the mass percentage of the polyurethane dispersion. Based on the same principle as described above, the mass percentage of the polyurethane dispersion preferably includes 25%-30%, more preferably 26%-29%, and more preferably It is 27%-28%. Wherein, the polyurethane dispersion liquid has a soft film formation, is suitable for hot pressing, has excellent adhesion and high solid content (the solid content is the mass percentage of the remaining part of the emulsion or paint after drying under specified conditions). The solid content of the polyurethane dispersion is about 43%. The polyurethane dispersion is preferably polyurethane dispersion 5450, and specifically may be polyurethane dispersion 5450 produced by Derui Leather Co., Ltd.

In principle, the present invention does not specifically limit the mass percentage of the water-based polyurethane resin. Based on the same principle as described above, the mass percentage of the water-based polyurethane resin preferably includes 5%-10%, more preferably 6%-9%, and more preferably It is 7% to 8%. Wherein, the water-based polyurethane resin is preferably water-based polyurethane resin 1225, and specifically may be water-based polyurethane resin 1225 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd. Adding the water-based polyurethane resin of the same material as the coating film to the primer layer can improve the physical similarity between the primer layer and the coating film, thereby further strengthening the primer layer and the coating film Fastness to fit.

In principle, the present invention does not specifically limit the mass percentage of the crosslinking agent. Based on the same principle as described above, the mass percentage of the crosslinking agent preferably includes 0.5% to 1%, more preferably 0.6% to 0.9%, more preferably It is 0.7% to 0.8%. Wherein, the crosslinking agent further enhances the adhesion fastness. The cross-linking agent is preferably cross-linking agent 105, and specifically can be cross-linking agent 105 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not particularly limit the mass percentage of the pigment paste. Based on the same principle as described above, the mass percentage of the pigment paste preferably includes 1.5% to 3.0%, more preferably 1.8% to 2.7%, and more preferably 2.1 %～2.4%.

In principle, the present invention has no particular limitation on the thickness of the substrate. Based on the same principle as described above, the thickness of the substrate is preferably 0.3 to 0.8 mm, more preferably 0.3 to 0.7 mm, more preferably 0.4 to 0.7 mm, More preferably, it is 0.4 to 0.6 mm.

In principle, the present invention has no special restrictions on the material of the substrate. Based on the same principle as described above, the substrate is a fabric with a dense structure and a smooth surface, and has a certain elasticity. The substrate does not affect the The softness of the woven fabric layer of the batt layer or the integrated layer of dermis and hair forms the same characteristics as the natural skin germ surface, and has certain fiber extensibility, compactness and pile feeling, so that it can be on the surface of the substrate. Form a micron-level finishing layer. The material of the substrate preferably includes suede and/or Lycra fabric, that is, suede substrate and/or Lycra fabric substrate, more preferably suede or Lycra fabric.

In principle, the present invention has no special restrictions on the grammage of the suede. Based on the same principle as described above, the grammage of the suede is preferably 180-240 g/m ² , more preferably 190-230 g/m ² , More preferably, it is 200 to 220 g/m ² . The suede is attached to the woven fabric surface of the woven fabric layer or the skin layer of the leather and wool integrated layer to form a wool and leather integrated composite material with a tactile feel and certain elasticity.

In principle, the present invention has no special restrictions on the material of the adhesive layer. Based on the same principle as described above, the adhesive layer is used to bond the substrate to the woven surface of the woven layer or the integrated leather and wool layer. On the cortex. The adhesive layer has excellent bonding strength, temperature resistance, chemical corrosion resistance, aging resistance and other characteristics, and is an environmentally friendly adhesive. The material of the adhesive layer preferably includes PUR hot melt adhesive, that is, the PUR hot melt adhesive adhesive layer, which can be cured by moisture in the air. In the present invention, PUR hot melt adhesive is selected for bonding, that is, adhesive glue. Specifically, the PUR hot-melt adhesive is coated on the substrate through a laminating device, and then is laminated with the braid surface of the braid layer or the skin layer of the dermis and wool integrated layer. The peel strength of the skin layer of the base material and the braid layer or the base material and the dermal hair integrated layer bonded by the adhesive layer can reach more than 0.5Kg/cm. Those skilled in the art can understand that the adhesive may form a layer structure or not have a corresponding layer structure, but it does not affect the overall layer structure description of the integrated leather and leather composite material of the present invention. Those skilled in the art are based on common knowledge in the field. Can understand its meaning normally.

In principle, the present invention does not specifically limit the specific selection of the braid layer with the batt layer. Based on the same principle as described above, the braid layer with the batt layer preferably includes a double layer with a batt layer and a braid layer. The structure is specifically preferably a knitted fabric layer knitted with a batt layer.

In principle, the present invention has no particular limitation on the thickness of the braid layer. Based on the same principle as described above, the thickness of the braid layer is preferably 0.4 to 1 mm, more preferably 0.5 to 0.9 mm, and more preferably 0.6 to 0.8 mm. .

In principle, the present invention has no special restrictions on the material of the braid layer. Based on the same principle as described above, the material of the braid layer preferably includes one or more of yarn, fiber, acrylic, woolen thread, and polyester filament. , That is, the braid layer preferably includes one or more of a yarn braid layer, a fiber braid layer, an acrylic braid layer, a woolen yarn braid layer, and a polyester silk braid layer, and more preferably includes cotton yarn, hemp yarn One or more of rayon, acrylic, wool and polyester yarn, more preferably cotton yarn, hemp yarn, rayon yarn, acrylic fiber, wool yarn or polyester yarn.

In principle, the present invention has no special restrictions on the material of the hair layer. Based on the same principle as described above, the material of the hair layer preferably includes artificial hair and/or real hair, that is, artificial hair layer and/or real hair layer, more preferably It is artificial or real hair. The real hair preferably includes natural animal hair such as wool and rabbit hair, and the artificial hair is man-made fiber. While knitting to form the knitted fabric layer, the real wool and/or artificial wool is knitted on the knitted fabric layer, thereby forming a batt layer on the knitted fabric layer.

In principle, the present invention has no particular limitation on the specific morphology of the other side of the coating film. Based on the same principle as described above, the other side of the coating film, that is, the opposite side of the side where the coating film and the primer layer are combined , Preferably with profiling lines. More specifically, the material forming the coating film is coated on a lined release paper, and then the release paper is peeled off, thereby forming a contoured line on the side of the coating film away from the primer layer.

In principle, the present invention does not particularly limit the thickness of the skin layer of the dermis and hair integrated layer. Based on the same principle as described above, the skin thickness of the dermis and hair integrated layer is preferably 0.2 to 1 mm, more preferably 0.2 to 0.8 mm, and more preferably 0.2 to 0.5 mm, more preferably 0.3 to 0.4 mm.

In principle, the present invention does not specifically limit the specific structure of the skin layer of the dermis and hair integrated layer. Based on the same principle as described above, the skin layer of the dermis and hair integrated layer is preferably a skin layer after skin peeling.

In principle, the present invention does not specifically limit the specific morphology of the skin layer of the dermis and hair integrated layer. Based on the same principle as described above, the skin layer of the dermis and hair integrated layer preferably contains a grain layer fiber structure, and more preferably does not include a mesh layer. Fiber structure. That is, in the present invention, through the skinning process, the network layer fiber structure of the skin layer can be removed, leaving a grain surface layer fiber structure of about 0.2 mm.

The present invention is aimed at the natural fur leather color embryo material, that is, the integrated layer of dermis and hair. It is preferable that a part of the board surface is sliced off by a skinning machine, leaving only a very thin board surface, by laminating substrates such as suede and performing primer coating And the transfer bonding of the finishing layer. The design of the present invention is based on the requirements of thin, light and soft raw material skins for materials such as clothing, but the number of raw material skins that meets this characteristic is limited. Leather materials that do not meet the requirements of conventional processing methods for dual-use products can be used as clothing leather; on the other hand, the conventional board surface has loose surface, serious spots and other defective secondary leathers can be used well. What's more, the skinning process removes the fiber structure of the mesh layer of the leather material, leaving the fiber structure of the grain surface layer, which is very compact and has the characteristics of thinness, lightness and softness. On the one hand, this method enriches the number of raw material skins that can be used as clothing leather to meet market demand; on the other hand, it greatly improves the effective utilization of low-grade leather materials and increases their added value.

Although the natural fur leather color embryo material (dermis and hair integrated layer) after the skin has the defect that the strength of the leather material is deteriorated, in the present invention, the leather after the skin is bonded to the base material such as suede. Not only does it not affect the thin, light and soft characteristics of the leather, the feel and thickness have reached the same level as that of the real wool leather integrated material, but also the strength of the leather is improved, so that the strength of the leather meets the requirements of clothing leather.

Refer to FIG. 1, which is a schematic structural diagram of the integrated wool-leather composite material provided by the present invention. Among them, 1 is a texture, 2 is a coating film, 3 is a primer layer, 4 is a substrate, 5 is an adhesive layer, 6 is a knitted fabric layer, and 7 is a batt layer.

In the present invention, the base material such as suede is attached to the woven fabric layer of the woven wool (the wool layer and the woven fabric layer with the wool layer) or the leather surface integrated with the dermis, without affecting the woven wool or the dermis. Under the condition of the original softness of the integrated material, it forms a backing with the same characteristics as the natural dermal surface, a certain degree of fiber extensibility, compactness and pile feeling, so that a micron-level coating layer can be made on it. Moreover, when woven wool or leather wool is integrated with suede and other substrates, PUR hot melt adhesive (one-component hot melt adhesive structure without organic solvents) is specially selected, which can be cured by moisture in the air, and has excellent The adhesive strength, temperature resistance, chemical corrosion resistance and aging resistance are characteristics of an environmentally friendly adhesive). The peel strength test result of the laminated composite material can reach more than 0.5kg/cm.

At the same time, the coating film of the present invention requires a micron-level coating thickness and can be smoothly transferred from the release paper to the backing (substrate such as suede) integrated with woven wool or dermis. The coating is required to be coated on the woven wool. The presenting effect of the material or leather hair integrated material is to cover the structure of the backing substrate, and it is required to be closely attached to the primer layer, and the consistency of the fit is good, and there should be no blistering or separation of the coating. This is One of the key points in the technical scheme of the present invention. Based on the comprehensive performance requirements of the target product, for the coating film, the present invention specifically selects a coating film formulation with elasticity, good coverage and uniform surface filling. Among them, the water-based polyurethane resin 1225 is matched with transparent, colorless, medium-soft, and adhesive. The strong polyurethane dispersion 127 and the thin and fine water-soluble synthetic resin RC-2349 with natural leather gloss and hand feeling, good extensibility, these three types of materials have good compatibility and exert their own advantages when used together. Laid the foundation for the good film formation of the coating film, and in order to further optimize the performance of the film-forming layer to the performance of the optimal feel and consistency, the formulation also deliberately added additives and leveling agents and feel wax agents, and finally achieved thinness. It is a coating film that is soft to the touch, natural luster of the leather and good film consistency, easy to peel from the release paper, and firmly adhered to the base coating of woven wool or leather wool.

The setting of the primer coating process formula and the addition and selection of the substrate in the present invention are one of the key points of the technical scheme of the present invention. The composite substrate of the present invention is preferably suede or Lycra fabric, especially suede is a raised textile fabric, which is completely different from the material and structure of the coating film. Therefore, the combination of the two-layer structure and the conventional concept are used It is impossible for glue materials to stick together. The present invention specifically selects and combines the formula of the primer layer. The selected film is soft, suitable for hot pressing, has excellent adhesion and high solid content (about 43 % Solid content) polyurethane dispersion 5450, matched with a certain proportion of water-based polyurethane material 1225 with the same composition as the coating film. In order to further strengthen the adhesion fastness, a trace amount of crosslinking agent 105 is added to the formula. The primer formulation not only plays the role of bonding the substrate and the coating film firmly, but also can be fused with the coating film to form a consistent chemical material, and finally achieves the product goal of high simulation of the fur coating technology effect on the back of the substrate.

The integrated leather-like material made by weaving wool of the present invention is similar to the integrated material of natural leather in terms of hand feeling, appearance and use. It is a good supplement to the limited natural raw material leather resources, and the finished product is better than the finished product. Abrasion resistance, color fastness to rubbing, color fastness to migration, resistance to tortuosity, resistance to hydrolysis and other physical properties. The real hair leather integrated material produced by the present invention through the leather and wool integrated layer, on the one hand, enriches the number of raw leathers with special requirements that can be used for clothing leather and other purposes, and meets the market demand. On the other hand, it greatly improves the low-grade leather. Effective use of materials and increase its added value.

The present invention provides a method for preparing a hair-leather integrated composite material, which includes the following steps:

3) After ironing and laminating the coating film surface of the release paper coated with the coating film and the primer coating of the semi-finished product obtained in the above steps, after drying it again, the hair and leather integrated composite material is obtained.

The specific steps can be as follows:

1`) After bonding the woven fabric or leather wool integrated material with the wool layer and the substrate through the adhesive layer, a composite woven wool material with a substrate backing or a leather wool integrated material with a substrate backing is obtained Material;

2`) After the composite base coating on the substrate surface of the composite woven wool material with a base material backing or an integrated leather and hair material with a base material backing obtained in the above steps, it is baked to obtain a semi-finished product;

3`) Coat the water-based polyurethane material on the release paper, and form a coating film on the release paper after baking;

4') After ironing and laminating the coating film on the release paper and the primer layer of the semi-finished product obtained in the above steps, after drying it again, a leather-integrated composite material is obtained.

5`) The dried leather integrated composite material is cooled by the conveyor belt and transferred to the winding device point at the same time, the leather integrated composite material is peeled from the release paper, so as to smoothly transfer the coating film on the release paper On the backing of the composite woven wool material or the leather and hair integrated material, a hair leather integrated composite material with a coating film with a release paper pattern style is formed.

In principle, the present invention deals with the selection and composition of raw materials and the corresponding optimization principles in the preparation method of the said one type of leather integrated composite material, the selection and composition of the corresponding raw materials in the aforementioned integrated leather composite material, and the corresponding optimization principles All of them can be corresponded, so I won’t repeat them here.

In the present invention, the woven fabric or leather wool integrated material woven with the batt layer is firstly bonded with the base material through an adhesive to obtain a composite material with a base material backing. That is to say, the present invention first combines the braided fabric with the batt layer and the base material through the adhesive glue to obtain the composite braided wool material with the base material backing; or the present invention first combines the leather and hair integrated material and the base material through After the adhesive glue is bonded, a leather and hair integrated material with a base material backing is obtained.

In principle, the present invention does not particularly limit the bonding speed. Those skilled in the art can make selections and adjustments according to actual application conditions, product requirements and quality requirements. The high-grade coating layer has the characteristics more consistent with the natural skin embryo board surface, and can also realize diversified board surface styles. The bonding speed is preferably 3.5-4.5m/min, more preferably 3.7-4.3m/ min, more preferably 3.9 to 4.1 m/min.

In principle, the present invention does not particularly limit the pressure of the adhesion. Based on the same principle as described above, the pressure of the adhesion is preferably 50-100 kg/cm ² , more preferably 60-90 kg/cm ² , and more preferably 70 ～80kg/cm ² .

In principle, the present invention does not particularly limit the bonding temperature. Based on the same principle as described above, the bonding temperature is preferably 135 to 145°C, more preferably 137 to 143°C, and more preferably 139 to 141°C.

The adhesive of the present invention preferably adopts PUR hot-melt adhesive. Through a composite laminating device, the PUR hot-melt adhesive is coated on the backing of the substrate and bonded with the layer of the braid to form a pile-touch and certain elasticity. A flat and dense backing composite braided wool material; or through a composite laminating device, PUR hot melt adhesive is coated on the leather and wool integrated material and attached to the leather surface to form a pile touch, a certain elasticity, flat and compact The backing is a one-piece material of composite leather and wool.

In the present invention, after the composite woven wool material with a substrate backing or the integrated leather and wool material has a composite primer on the substrate surface obtained in the above steps, the semi-finished product is obtained after baking.

In principle, the present invention does not specifically limit the specific selection of the composite primer. Based on the same principle as described above, the composite primer is preferably a spray primer. The composite primer layer is specifically preferably a spray primer layer, and the water-based polyurethane material is sprayed on the surface of the substrate through a spray gun machine.

In principle, the present invention does not specifically limit the baking temperature for forming the primer layer. Based on the same principle as described above, the baking temperature is preferably 90-100°C, more preferably 92-98°C, and more preferably 94～96℃.

In principle, the present invention does not specifically limit the baking time for forming the primer layer. Based on the same principle as described above, the baking time is preferably 1 to 2 minutes, more preferably 1.2 to 1.8 minutes, and more preferably 1.4. ~1.6min.

In the present invention, the base material surface of the backing of the composite woven wool material or the composite leather wool integrated material is primed by a spray gun machine, and then baked in an oven, so that the polyurethane material and the cross-linking agent have the best active reaction. Form a primer layer with better adhesion properties. The formulation materials of the primer coating are specially selected water-based polyurethane, pigment paste and cross-linking agent to form a primer layer with adhesive properties.

In the present invention, after the coating film surface of the release paper coated with the coating film and the primer coating of the semi-finished product obtained in the above steps are ironed and bonded, after being baked again, a leather-integrated composite material is obtained.

In principle, the present invention does not specifically limit the specific preparation method of the release paper coated with a coating film. Based on the same principle as mentioned above, the release paper coated with a coating film is specifically prepared on the release paper. Roll coating of water-based polyurethane coating material (ie coating film), and form by physical heating and drying. In the present invention, the release paper is preferably provided with profiling lines, the coating film is attached to the primer layer, the release paper is peeled off, and the profiling lines are formed on the outer surface of the coating film.

The invention uses a combination of water-based resin materials with good film-forming properties, strong hiding power, and high physical properties (flexibility resistance, scratch resistance), and a small amount of specific hand-feel wax agent and other additives are added, and pigment paste is applied by rolling. Coating on the release paper by the machine, and then pass it through an oven at 120-130°C (preferably 122-128°C, more preferably 124-126°C) for the first time baking for 1 to 3 minutes (preferably 1.2 to 2.8 minutes, more preferably) 1.5～2.5min, more preferably 1.7～2.3min), to further react the chemical material to form a good film. At the same time, when baking at a high temperature, the excess water in the film-forming material is volatilized by water vapor to form a film The layer has a microporous structure, which not only ensures a good film formation of the coating layer, but also provides a basis for the subsequent laminating and peeling process, while ensuring that the material has certain air permeability properties.

In principle, the present invention does not specifically limit the ironing and bonding temperature of the coating film on the release paper and the primer layer on the semi-finished product. Based on the same principle as described above, the ironing and bonding temperature is preferably 120~ 140°C, more preferably 123 to 137°C, more preferably 126 to 134°C, more preferably 129 to 131°C.

In principle, the present invention does not particularly limit the speed of the ironing and bonding. Based on the same principle as mentioned above, the speed of the ironing and bonding is preferably 3.5-4.5m/min, more preferably 3.7-4.3m/min, More preferably, it is 3.9 to 4.1 m/min.

In principle, the present invention does not specifically limit the pressure of the ironing and bonding. Based on the same principle as described above, the pressure of the ironing and bonding is preferably 30-40 kg/cm ² , more preferably ^{32-38 kg/cm 2} , More preferably, it is 34 to .36 kg/cm ² .

In principle, the present invention does not specifically limit the temperature at which the coating film on the release paper and the primer layer of the semi-finished product are flattened and bonded, and based on the same principle as described above, the temperature for the second baking is preferably 70 to 80°C, more preferably 72 to 78°C, still more preferably 74 to 76°C.

In principle, the present invention does not specifically limit the time for the re-bake. Based on the same principle as described above, the time for the re-bake is preferably 3 to 5 minutes, more preferably 3.2 to 4.8 minutes, and more preferably 3.5 to 4.5 minutes. , More preferably 3.7 to 4.3 min.

In the present invention, an integrated layer of woven wool or real fur with a primer layer and a release paper coating film are laminated using an ironing machine at a certain temperature, and then preferably baked at a certain temperature in an S-shaped oven, the S-shaped On the one hand, the oven can save space, on the other hand, the temperature from the upper layer to the lower layer of the S-shaped oven is gradually reduced. To the lower layer, the temperature gradually decreases during the process, so that the sudden drop in temperature will not cause sudden changes in the performance of the laminated material, which is beneficial to the further fusion of the material, and thus the base coating and the coating layer of the release paper are firmly and consistently combined. Finally, a hair-leather integrated composite material with a coating layer with a release paper texture style is formed.

The present invention is a complete and refined overall preparation process, improves the versatility of the leather integrated composite material, controls the micron-level coating layer, has the characteristics more consistent with the natural leather embryo board surface, and can also realize diversified board surface styles. The above-mentioned preparation steps may specifically be the following steps:

The first step: use PUR hot melt adhesive to coat PUR hot melt adhesive on the substrate fabric through the composite laminating equipment and attach it to the knitted fabric surface with the wool layer or the leather surface of the leather and wool integrated material to form the belt base Composite braided wool material or composite leather wool integrated material with material backing;

The second step: release paper coating: use a combination of water-based resin materials with good film-forming properties, strong hiding power, and high physical properties (resistance to tortuosity, scratch resistance) and add a small amount of additives such as hand-feeling wax agent, and is equipped with The pigment paste is painted on the release paper by a roller coater, and then dried in an oven.

The third step: On the backing of the composite woven wool material or the composite leather wool integrated material, the primer is applied by a spray gun, and then it is baked in an oven, so that the polyurethane material and the crosslinking agent forming the primer have the best activity It reacts to form a primer layer with better adhesion properties.

The fourth step: the composite braided wool material with the primer layer or the composite leather wool integrated material and the release paper coating layer are laminated using an ironing machine at a certain temperature, and then dried in an S-shaped oven to make the The combination of the base coat of the composite woven wool material or the composite leather wool integrated material and the coating layer of release paper is firm and consistent.

Step 5: After the laminated composite material is baked, it is cooled by the conveyor belt and transferred to the point of the winding device. The composite woven wool material or composite leather wool integrated material is peeled from the release paper, so as to smoothly release the material. The coating layer on the paper is transferred to the backing of the woven wool or leather wool integrated material to form a woven wool material with a coating layer with a release paper pattern style, which can also be called an integrated wool-like material; The integrated material of leather and hair with a coating layer in the paper pattern style can also be called an integrated material of real hair leather.

In the present invention, in principle, there is no special restriction on the bonding of the base material fabric and the leather surface of the dermis and hair integrated material. Based on the same principle as described above, the dermis and hair integrated layer is preferably the surface of the dermis and hair integrated layer before being attached. The skin layer is thinned.

In principle, the present invention does not specifically limit the specific morphology of the skin layer of the dermis and hair integrated layer after thinning. Based on the same principle as described above, the skin layer of the dermis and hair integrated layer preferably contains a grain layer fiber structure, It is more preferable not to include the fiber structure of the net-like layer. That is, in the present invention, through the skinning process, the network layer fiber structure of the skin layer can be removed, leaving a grain surface layer fiber structure of about 0.2 mm.

Refer to FIG. 2, which is a schematic diagram of the process flow of the method for preparing the integrated leather and wool composite material provided by the present invention.

In the preparation process of the present invention, a specific temperature is specially selected, and high temperature is adopted for rapid film-forming and bonding. In addition, the fusion reaction of chemical materials is further enhanced under low temperature conditions to strengthen the bonding fastness and bonding uniformity, that is, the ironing machine Laminating temperature and re-baking temperature. The advantages of high-temperature film formation in the present invention can make the coating layer structure form a microporous structure to help improve the air permeability of the material. The high-temperature bonding enables the adhesive material to exert its best characteristics under the maximum active application conditions. The low-temperature baking treatment makes the multi-layer structural materials better and further fusion, and the consistency of the final finished material, the firmness of the coating layer, the feel and the appearance are optimized.

The present invention also provides a real hair leather integrated composite material, including:

Coating film

A primer layer compounded on the coating film;

An isolation layer compounded on the primer layer;

An integrated layer of dermis and hair compounded on the isolation layer;

In principle, the present invention provides the layer structure, raw material selection, composition and corresponding optimization principles in the above-mentioned real hair leather integrated composite material, and the corresponding layer structure, raw material selection, composition and corresponding optimization principles in the aforementioned hair leather integrated composite material. , All of which can be corresponded, so I won’t repeat them one by one here. Among them, the specific preferred composition of the primer layer is different from that of the aforementioned integrated leather and leather composite material. The dermis and hair integrated layer may not need to be thinned.

In principle, the present invention does not specifically limit the material of the isolation layer. Based on the same principle as described above, the material of the isolation layer preferably includes a waterproof material, that is, a waterproof isolation layer. The isolation layer of the present invention is an isolation layer used for backing the dermis and hair integrated layer.

In principle, the present invention does not have any special restrictions on the waterproof material. Based on the same principle described above, the waterproof material is preferably butyl ester, and specifically may be butyl ester 321 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not specifically limit the spraying amount of the isolation layer. Based on the same principle as described above, the spraying amount of the isolation layer is preferably 25 to 35 g/SF, more preferably 25 to 30 g/SF, and more preferably 28. -32g/SF, more preferably 30-35g/SF.

In principle, the present invention does not particularly limit the material of the primer layer. Based on the same principle as described above, the material of the primer layer (primer coating layer) preferably includes a water-based polyurethane resin material, that is, a water-based polyurethane resin primer layer.

Calculated as a percentage of the mass of raw materials, more preferably include:

In principle, the present invention does not particularly limit the mass percentage of the water-based polyurethane resin. Based on the same principle as described above, the mass percentage of the water-based polyurethane resin is preferably 15%-20%, more preferably 16%-19%, and more preferably It is 17%-18%. Wherein, the water-based polyurethane resin film has a soft hand feel, is resistant to high temperature ironing, and has good adhesive properties. The water-based polyurethane resin is preferably water-based polyurethane resin 207-7, and specifically can be water-based polyurethane resin 207-7 produced by Yinyang Chemical Co., Ltd.

In principle, the present invention does not specifically limit the mass percentage of the general-purpose acrylic emulsion resin. Based on the same principle as described above, the mass percentage of the general-purpose acrylic emulsion resin is preferably 15%-20%, more preferably 16%. -19%, more preferably 17%-18%. Wherein, the general-purpose acrylic emulsion resin has good film-forming feel, good covering, and has good resistance to dryness, moisture and friction, scratch resistance, and yellowing resistance. The general-purpose acrylic emulsion resin is preferably general-purpose acrylic emulsion resin 177, and specifically may be general-purpose acrylic emulsion resin 177 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not specifically limit the mass percentage of the acrylic resin. Based on the same principle as described above, the mass percentage of the acrylic resin is preferably 30%-40%, more preferably 32%-38%, and more preferably 34%. %～36%. Wherein, the acrylic resin is transparent, colorless, soft, and has good penetration and adhesion. The acrylic resin is preferably acrylic resin 211, and specifically may be acrylic resin 211 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention does not particularly limit the mass percentage of casein. Based on the same principle as described above, the mass percentage of casein is preferably 3% to 4%, more preferably 3.2% to 3.8%, and more preferably 3.4. %～3.6%. Wherein, the casein has filling properties and can improve the bearing capacity of the leather board facing the coating layer. The casein is preferably casein 220, and specifically may be casein 220 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In principle, the present invention has no special restrictions on the mass percentage of the penetrant. Based on the same principle as described above, the mass percentage of the penetrant is preferably 1.5% to 2%, more preferably 1.6% to 1.9%, and more preferably 1.7 %～1.8%. Wherein, the penetrating agent enables the coating layer to have good contact with the surface of the leather board and has a slight penetration, ensuring that the subsequent primer layer can have a good bonding ability with the release paper coating layer. The penetrating agent is preferably penetrating agent 4325, and specifically may be penetrating agent 4325 produced by Starr Leather Chemical Co., Ltd.

In principle, the present invention has no particular limitation on the mass percentage of the pigment paste. Based on the same principle as described above, the mass percentage of the pigment paste is preferably 9%-12%, more preferably 9.5%-11.5%, and more preferably 10. %～11%. Wherein, the pigment paste is used for coloring, has bright color and certain air permeability. The pigment paste is preferably a pigment paste 725, and specifically may be a pigment paste 725 produced by Shanghai Pilka Le Fuyi Chemical Co., Ltd.

In the preparation method of the real hair leather integrated composite material provided by the present invention, the setting of the back cover process is adopted, and the main component of the fur surface is the leather fiber, followed by the organic tanning agent, dye, auxiliary agent combined in the processing process such as tanning and dyeing in the early stage. Therefore, if the primer is directly applied to the board surface, the primer material will penetrate into the leather board surface in a large amount. This will cause the leather to feel hard on the one hand, and affect the composition with the release paper on the other hand. For the adhesion of the film layer, the present invention, especially before the primer coating, joins the board surface sealing process, spraying the waterproof material on the board surface, and controlling the degree of penetration of the primer coating material in the leather material.

However, the primer coating process in the preparation method of the real hair leather integrated composite material of the present invention particularly adopts a film-forming soft touch, high-temperature ironing resistance, and then a water-based polyurethane resin 207-7 with good performance. General-purpose acrylic emulsion resin 177 and transparent, colorless, soft, and good penetration and adhesion acrylic resin 211 with good dry resistance, moisture resistance and scratch resistance. In addition, casein 220 with filling properties is added to improve the bearing capacity of the fur board surface to the coating layer. Secondly, based on the back cover treatment of the leather board surface, a small amount of penetrant 4325 is added, so that the coating layer can be in good contact with the board surface. The contact and slight penetration ensure that the subsequent process can have good adhesion with the release paper coating layer.

The present invention is a real hair leather integrated material made by a leather and wool integrated layer. On the one hand, the material improves the physical properties and product grade of the product, and has excellent color fastness to rubbing, color fastness to PVC migration, abrasion resistance, static waterproofing And other characteristics, to meet market demand, on the other hand, greatly improve the effective use of low-grade leather, and increase its added value.

The present invention provides a method for preparing a real hair leather integrated composite material, which includes the following steps:

a) After passing the back cover of the skin board surface of the fur-colored embryo, the base coat is compounded, and then the semi-finished product is obtained after baking;

b) After the coating film surface of the release paper coated with the coating film and the primer coating of the semi-finished product obtained in the above steps are ironed and bonded, and then dried again, a leather-integrated composite material is obtained.

In principle, the present invention provides raw material selection, composition, preparation steps and corresponding optimization principles in the preparation method of the above-mentioned real hair leather integrated composite material, and the corresponding raw material selection, composition and preparation steps in the preparation method of the aforementioned hair leather integrated composite material And the corresponding optimization principles, and the corresponding optimization principles can all be corresponded, and will not be repeated here.

In principle, the present invention has no special restrictions on the specific manner of the back cover. Those skilled in the art can select and adjust according to actual application conditions, product requirements and quality requirements. The high-grade finishing layer has the characteristics more consistent with the natural skin embryo board surface, and can also realize diversified board surface styles. The back cover preferably includes the use of materials with specific waterproof properties for the back cover.

Refer to Fig. 3, which is a schematic process flow diagram of the method for preparing the real hair leather integrated composite material provided by the present invention.

In the preparation method of the real hair leather integrated composite material provided by the present invention, the natural skin embryo is used as the raw material to make the hair leather integrated material. Due to the loose load-bearing capacity of the wool leather board surface fiber, if the conventional other material release paper transfer coating technology is used , The film-forming layer and the leather board surface will be wrinkled, blistered, separated, etc., and the consistency of the bonding effect is poor. The present invention addresses the technical difficulties, from the back cover treatment of the board surface to the primer coating process design of the board surface, not only Waterborne polyurethane resin with good performance, while using filling acrylic resin and casein materials, and the introduction of auxiliary penetrants, so that the bottom coating of the board not only plays a good adhesion role, but also improves the load-bearing capacity of the leather board. .

The real hair leather integrated composite material provided by the present invention has more advantages in product physical properties and product grades than the hair leather integrated material made by traditional coating and other methods. The product exhibits color fastness to rubbing, good PVC migration resistance, and abrasion resistance. Good performance, a certain static waterproofing ability can be obtained without a separate waterproofing treatment. The overall quality and color consistency of the product are good. It has strong ability to cover defects such as spots and other defects of the original leather, which greatly improves the effective use of the leather. Rate. Moreover, it has high production efficiency and is environmentally friendly.

The above steps of the present invention provide a hair and leather integrated composite material with high physical properties and a preparation method thereof, and a real hair leather integrated composite material with high physical properties and a preparation method thereof. The invention is realized by creatively selecting and improving the process and raw materials. On the one hand, the present invention can be based on natural fur as the raw material for the skin and wool layers, on the other hand, it can also use artificial wool knitted fabrics as the skin and wool layers. The coating thickness range can be controlled at the micron level by using water-based coating materials through coating technology. In addition, there are integrated materials of leather and leather with different panel effects and styles. The panel style can achieve any texture or visual effect, such as the current new material carbon fiber, optical effect fabrics and other styles. In the present invention, the knitted fabric and the wool layer or the dermal wool layer are attached to the substrate fabric, and the original softness of the knitted wool is not affected, and the formation has the same characteristics as the natural leather embryo board surface, and has certain fiber extensibility and compactness. And pile-like backing, so that a micron-level finishing layer can be made on it. Compared with the leather integrated composite material provided by the present invention, it has better physical performance characteristics (wear resistance, color fastness to rubbing, color fastness to migration, resistance to tortuosity, resistance to hydrolysis, etc.). The chemical materials are all environmentally friendly water-based materials, with good quality stability and consistency, simple production process, high production efficiency, and can achieve standardized operations compared with traditional integrated processing methods of wool and leather, and have high environmental protection efficiency, green and sustainable, and suitable Large-scale production promotion and application. The integrated composite material of wool and leather with high physical properties provided by the present invention is similar to the integrated material of natural wool and leather in terms of hand feeling, appearance and use, and is a good supplement to the limited natural raw material leather resources.

In order to further illustrate the present invention, the following will describe in detail a hair-leather integrated composite material and its preparation method, a real hair-leather integrated composite material and its preparation method provided by the present invention in combination with examples, but it should be understood that these examples are The implementation is carried out on the premise of the technical solution of the present invention, and the detailed implementation mode and specific operation process are given, just to further illustrate the features and advantages of the present invention, and not to limit the claims of the present invention. The protection scope of the present invention It is not limited to the following embodiments.

Example 1

Integrated wool-leather composite material with braided wool

The first step: using PUR hot melt adhesive to coat the hot melt adhesive on the suede through the composite laminating equipment and laminating with the braid surface to form a composite braided wool material with a base cloth backing.

Among them, the thickness of suede: 0.4mm, and the weight of suede: 210g/m ² ;

Hot melt adhesive bonding pressure: 60kg/cm ² , hot melt adhesive bonding speed: 4m/min, bonding temperature 140°C.

The second step: release paper coating: the coating film material using the following formula is coated by a roller coater, and then dried in an oven.

Among them, the coating process formula:

Waterborne polyurethane resin 1225: 27%

Polyurethane dispersion 127: 23%

Water-soluble synthetic resin RC-2349: 16%

Hand-feel wax 253: 3.5%

Pigment paste 780: 10%

Leveling agent H: 0.2%

Water: 21.3%

Oven temperature: 125°C, film forming and baking time 1.5 minutes;

The thickness of the film-forming layer is 30 μm.

The third step: the backing of the composite woven wool material is primed by a spray gun, and then dried in an oven to form a primer with better adhesion performance.

Among them, the bottom coating process formula:

Polyurethane dispersion 5450: 30%

Polyurethane resin 1225: 10%

Crosslinking agent 105: 0.5%

Black pigment paste: 2.3%

Water: 57.2%

Spraying amount of primer: 2.2g/SF;

The oven temperature is 93°C, and the baking time is 1 minute.

The fourth step: the braided wool with the primer layer and the release paper coating layer are laminated using an ironing machine at a certain temperature, and then dried in an S-shaped oven, so that the bottom coating of the braided wool and the release paper A firm and consistent combination of the finishing layer of the type paper.

Among them, the lamination temperature of the ironing machine is 130℃; the lamination pressure of the ironing machine is 40kg/cm ² ; the conveying speed of the ironing machine is 4m/min. For 4min.

Step 5: After being baked, the laminated composite material is cooled by the conveyor belt and conveyed to the point of the winding device, peeling the woven wool composite material from the release paper, so as to smoothly transfer the coating layer on the release paper On the woven wool backing, a woven wool material with a coating layer with a release paper pattern style is formed.

The performance test of the integrated wool-leather composite material with woven wool prepared in Example 1 of the present invention was performed.

Refer to Table 1. Table 1 is the performance test result of the hair and leather integrated composite material prepared in Example 1 of the present invention.

Table 1

Example 2

Hair leather integrated composite material with real hair leather integrated material

The first step: Use the sheeting machine to remove a part of the leather surface of the real hair leather integrated material, remove the fiber structure of the network layer of the skin layer, and leave the fiber structure of the grain surface layer about 0.2mm.

Step 2: Use PUR hot-melt adhesive to coat the suede on the suede through the composite laminating equipment and attach it to the leather surface of the real hair leather integrated material to form a composite real hair leather integrated with a base cloth backing Material.

Among them, the weight of suede: 230g/m ² ;

Hot melt adhesive bonding pressure: 80kg/cm ² , hot melt adhesive bonding speed: 3.5m/min, bonding temperature 143°C.

The third step: release paper coating: the coating film material with the following formula is coated by a roller coater, and then baked in an oven.

Among them, the coating process formula:

Waterborne polyurethane resin 1225: 28%

Polyurethane dispersion 127: 24%

Water-soluble synthetic resin RC-2349: 18%

Hand-feel wax 253: 4%

Pigment paste 780: 13%

Leveling agent H: 0.25%

Water: 12.75%

Oven temperature: 120°C, and the drying time for film formation is 2 minutes;

The thickness of the film-forming layer is 10 μm.

The fourth step: the backing of the composite woven wool material is primed with a spray gun, and then baked in an oven to form a primer with better adhesion performance.

Among them, the bottom coating process formula:

Polyurethane dispersion 5450: 28%

Polyurethane resin 1225: 8%

Crosslinking agent 105: 0.6%

Black pigment paste: 2%

Water: 61.4%

Spraying amount of primer: 2.5g/SF;

The oven temperature is 100°C, and the baking time is 1.5 minutes.

The fifth step: the woven wool with the primer layer and the release paper coating layer are laminated with an ironing machine at a certain temperature, and then dried in an S-shaped oven to make the primer layer of the woven wool and the release paper A firm and consistent combination of the finishing layers of type paper.

Among them, the bonding temperature of the ironing machine is 140℃; the bonding pressure of the ironing machine is 35kg/cm ² ; the conveying speed of the ironing machine is 3.5m/min. The time is 3min.

Step 6: After being baked, the laminated composite material is cooled by the conveyor belt and transferred to the point of the winding device. The woven wool composite material is peeled from the release paper, so as to smoothly transfer the coating layer on the release paper On the woven wool backing, a woven wool material with a coating layer with a release paper pattern style is formed. The performance test of the hair-leather integrated composite material with the real hair-leather integrated material prepared in Example 2 of the present invention was performed.

The performance test of the hair-and-leather-integrated composite material with a real-hair-leather-integrated material prepared in Example 2 of the present invention was performed.

See Table 2. Table 2 is the performance test result of the hair-leather integrated composite material with the real hair-leather integrated material prepared in Example 2 of the present invention.

Table 2

Example 3

Real hair leather integrated composite material

Step 1: Pass the skin surface of the fur color embryo through the back cover to obtain the fur color embryo of the back cover;

Wherein, the material of the back cover preferably includes a waterproof material, that is, a waterproof isolation layer, with a spray amount of 30 g/SF; the waterproof material is more preferably butyl 321.

Among them, the coating process formula:

Waterborne polyurethane resin 1225: 25%

Polyurethane dispersion 127: 20%

Water-soluble synthetic resin RC-2349: 15%

Hand-feel wax 253: 3%

Pigment paste 780: 10%

Leveling agent H: 0.2%

Water: 26.8%

Oven temperature: 130°C, film forming and baking time 2.5 minutes;

The thickness of the film-forming layer is 40 μm.

The third step: the surface of the fur color embryo on the back cover is primed with a spray gun, and then dried in an oven to form a primer with better adhesion performance.

Among them, the bottom coating process formula:

The oven temperature is 100°C, and the baking time is 1.5 minutes.

The fourth step: the fur color embryo with the primer layer and the release paper coating layer are laminated with an ironing machine at a certain temperature, and then dried in an S-shaped oven, so that the primer layer of the fur color embryo and The coating layer of release paper is a firm and consistent combination.

Among them, the pressing pressure of the ironing machine is 40kg/cm ² ; the conveying speed of the ironing machine is 3.5m/min.

Step 5: After being baked, the laminated composite material is cooled by the conveyor belt and conveyed to the point of the winding device. The fur color embryo composite material is peeled from the release paper, so as to smoothly remove the coating layer on the release paper. Transfer to the fur color embryo, and then form a real hair leather integrated composite material with a release paper texture style with a coating layer. The performance of the integrated composite material with real hair leather prepared in Example 3 of the present invention was tested.

The performance of the real hair leather integrated composite material prepared in Example 3 of the present invention was tested.

See Table 3, which is the performance test result of the real hair leather integrated composite material prepared in Example 3 of the present invention.

table 3

The above provides a detailed introduction to a hair-leather integrated composite material and its preparation method, a real hair-leather integrated composite material and its preparation method provided by the present invention, and specific examples are used in this article to carry out the principles and implementations of the present invention. As explained, the description of the above embodiments is only used to help understand the method and core idea of the present invention, including the best way, and also enables any person skilled in the art to practice the present invention, including manufacturing and using any device or system , And implement any combination of methods. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims, and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements that are not different from the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

A hair-leather integrated composite material, characterized in that it comprises:

Coating film

A primer layer compounded on the coating film;

A substrate compounded on the undercoat layer;

An adhesive layer compounded on the substrate;

A braided fabric layer with a batt layer compounded on the adhesive layer, the adhesive layer being compounded on the braided fabric surface of the braided fabric layer with a batt layer;

Or a dermal hair integrated layer compounded on the adhesive layer, and the adhesive layer is compounded on the skin layer of the dermal hair integrated layer.
The hair-leather integrated composite material according to claim 1, wherein the coating film comprises a water-based polyurethane resin coating film;

The thickness of the coating film is 4-50 μm;

The coating film is a microporous film.
The hair-leather integrated composite material according to claim 1, wherein the material of the coating film includes water-based polyurethane resin, polyurethane dispersion and water-soluble composite resin;

The material of the coating film also includes one or more of a hand-feeling wax agent, a pigment paste and a leveling agent.
The hair and leather integrated composite material according to claim 1, wherein the material of the coating film, calculated as a percentage of the mass of the raw material, comprises:
The hair and leather integrated composite material according to claim 1, wherein the primer layer comprises an aqueous polyurethane primer layer;

The roll coating amount of the primer layer is 2.1-2.5 g/SF.
The hair-leather integrated composite material according to claim 1, wherein the material of the primer layer comprises polyurethane dispersion and water-based polyurethane resin;

The material of the primer layer also includes a cross-linking agent and/or a pigment paste.
The hair and leather integrated composite material according to claim 1, wherein the material of the primer layer, calculated as a percentage of the mass of the raw material, comprises:
The hair-leather integrated composite material according to claim 1, wherein the thickness of the base material is 0.3-0.8 mm;

The substrate is a fabric substrate with a dense structure and a smooth surface;

The base material is a base material with fiber extensibility, compactness, and napness.
The hair-leather integrated composite material according to claim 1, wherein the material of the substrate comprises suede and/or Lycra fabric;

The weight of the suede is 180-240 g/m 2 .
The hair and leather integrated composite material according to claim 1, wherein the adhesive layer comprises a PUR hot melt adhesive adhesive layer;

The peel strength of the adhesive layer is greater than 0.5Kg/cm.
The hair-leather integrated composite material according to claim 1, wherein the knitted fabric layer with a batt layer is specifically a knitted fabric layer with a batt layer;

The thickness of the braid layer is 0.4-1 mm.
The hair and leather integrated composite material according to claim 1, wherein the material of the woven fabric layer comprises one or more of cotton yarn, hemp yarn, rayon fiber, acrylic fiber, woolen thread and polyester yarn;

The material of the wool layer includes artificial wool and/or real wool.
The hair-leather integrated composite material according to claim 1, wherein the other surface of the coating film opposite to the primer layer has a profiled texture;

The profiling pattern is obtained by rolling a patterned release paper.
The hair and leather integrated composite material according to claim 1, wherein the thickness of the skin layer of the dermis and hair integrated layer is 0.2 to 1 mm;

The skin layer of the dermis and hair integrated layer is the skin layer after the skin is thinned;

The skin layer of the dermis and hair integrated layer contains a grain layer fiber structure;

The skin layer of the dermis and hair integrated layer does not include the fiber structure of the reticular layer.
A real hair leather integrated composite material, which is characterized in that it comprises:

Coating film

A primer layer compounded on the coating film;

An isolation layer compounded on the primer layer;

An integrated layer of dermis and hair compounded on the isolation layer;

The isolation layer is compounded on the skin layer of the dermis and hair integrated layer.
The real hair leather integrated composite material according to claim 15, wherein the primer layer comprises an aqueous polyurethane resin primer layer;

The material of the primer layer, calculated as a percentage of the mass of the raw material, includes:
The real hair leather integrated composite material according to claim 15, wherein the isolation layer is an isolation layer used to seal the dermal hair integrated layer;

The isolation layer includes a waterproof material isolation layer.
The real hair leather integrated composite material according to claim 7, wherein the material of the isolation layer is butyl ester;

The spraying amount of the isolation layer is 25-35 g/SF.
A method for preparing an integrated composite material of wool and leather, which is characterized in that it comprises the following steps:

1) After bonding the woven fabric or leather wool integrated material with the batt layer and the base material through the adhesive, a composite material with a base material backing is obtained;

2) After the base coating is compounded on the substrate surface of the composite material with a substrate backing obtained in the above steps, the semi-finished product is obtained after baking;

3) After ironing and laminating the coating film surface of the release paper coated with the coating film and the primer coating of the semi-finished product obtained in the above steps, after drying it again, the hair and leather integrated composite material is obtained.
The preparation method according to claim 19, wherein the substrate is a fabric substrate with a dense structure and a smooth surface;

The substrate is a substrate with fiber extensibility, compactness and napness;

The material of the substrate includes suede and/or Lycra fabric;

The weight of the suede is 180-240 g/m 2 .
The preparation method according to claim 19, wherein the bonding speed is 3.5-4.5 m/min;

The bonding pressure is 50-100kg/cm 2 ;

The bonding temperature is 135-145°C;

The peel strength of the adhesive glue after bonding is greater than 0.5Kg/cm.
The preparation method according to claim 19, wherein the composite primer layer is specifically a spray primer layer;

The spray amount of the primer layer is 2.1～2.5g/SF;

The temperature of the baking is 90-100°C;

The baking time is 1 to 2 minutes.
The preparation method according to claim 19, wherein the undercoat layer, calculated as a percentage of the mass of the raw material, comprises:
The preparation method according to claim 19, wherein the release paper coated with a coating film is specifically obtained by the following steps:

Coating raw materials for the coating film on the release paper, and forming a coating film on the release paper after baking;

The coating film, calculated as a percentage of the mass of raw materials, includes:
The preparation method according to claim 19, characterized in that the temperature of the ironing and bonding is 120-140°C;

The ironing and bonding speed is 3.5～4.5m/min;

The ironing and bonding pressure is 30-40 kg/cm 2 .
The preparation method according to claim 19, wherein the temperature of the re-baking is 70-80°C;

The time for the re-baking is 3 to 5 minutes.