CN111231446A - Simulated laminated first layer cowhide and production method thereof - Google Patents

Simulated laminated first layer cowhide and production method thereof Download PDF

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Publication number
CN111231446A
CN111231446A CN202010036607.0A CN202010036607A CN111231446A CN 111231446 A CN111231446 A CN 111231446A CN 202010036607 A CN202010036607 A CN 202010036607A CN 111231446 A CN111231446 A CN 111231446A
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layer
simulated
cowhide
polyurethane resin
polyurethane
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Chinese (zh)
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阮道光
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Wenzhou Yixin Technology Development Co Ltd
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Wenzhou Yixin Technology Development Co Ltd
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Priority to CN202010036607.0A priority Critical patent/CN111231446A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B32B9/025—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch comprising leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/046—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The invention provides a simulated joint first layer cowhide, which comprises a first layer cowhide and a polyurethane resin surface layer, wherein the polyurethane resin surface layer comprises a simulated muscle bottom layer and a simulated cuticle layer arranged on the simulated muscle bottom layer, and one surface of the simulated muscle bottom layer, which is opposite to the simulated cuticle layer, is bonded with the first layer cowhide through foamed polyurethane. The production process is simple, convenient and quick, and is more environment-friendly compared with the existing leather production mode; the finished product has soft, full and elastic hand feeling, the color is wear-resistant to more than 4 grades (the level of a coated product is 2.5), the product has no crack when bent at normal temperature for 10 ten thousand (the coated product has poor hand feeling), the product has the bent time of more than 2 ten thousand at the low temperature of-20 ℃ (the coated product can be bent for 1 ten thousand times), and the surface of the product is not discolored when being cleaned by liquid detergents such as laundry detergent, liquid detergent and the like (the coated product is discolored); and the surface of the finished product shows the gully of the skin epidermis through color difference, and the appearance can be more real through matching different color matching.

Description

Simulated laminated first layer cowhide and production method thereof
Technical Field
The invention relates to the field of leather and leather production, in particular to simulated laminated first layer cowhide and a production method thereof.
Background
The raw material cow leather is processed by alkali test chrome sulfate tanning to prepare blue wet cow leather, the surface layer of the blue wet cow leather is provided with a nipple layer called a head layer, and the head layer of blue wet cow leather is processed by wet finishing, retanning, dyeing, fatliquoring and drying to obtain a head layer cow leather crust. The first layer of the cow leather crust leather is divided into two directional products, one product without being coated is nubuck, water dyed leather, aniline leather and the like, and the resources of the products are very few; the other is a product with the surface coated, because the characteristic utilization rate, the wear resistance, the flexing resistance, the hand feeling, the sanitary performance and the like of the coating process are difficult to meet the high-standard customer requirements, and meanwhile, the color of the existing cowhide is difficult to achieve the reality and the layering of the original fresh skin after treatment and dyeing, in order to improve the attractiveness, the technology utilizes release paper as a film, and the high-physical-property foamed polyurethane is attached to the base leather of the first layer cowhide, so that the high-utilization rate, the high-physical property, the surface-cleaning, the softness, fullness and elasticity of the simulated attached first layer cowhide are achieved.
Disclosure of Invention
Based on the problems, the invention aims to provide the simulated attaching first layer cowhide which has strong layering sense, is similar to fresh skin in appearance, has soft, plump and elastic hand feeling, is crack-resistant, is low-temperature-resistant and has a surface which is not easy to discolor, and the production method thereof.
Aiming at the problems, the following technical scheme is provided: the utility model provides a emulation laminating head layer cow hide, includes the head layer cow hide, still includes the polyurethane resin top layer, the polyurethane resin top layer includes the imitative flesh bottom and sets up the imitative cuticle on the imitative flesh bottom, through the bonding laminating of foaming polyurethane between imitative flesh bottom and the imitative cuticle relative one side of cuticle and the head layer cow hide.
In the structure, the first layer of cowhide is adhered to the surface layer of polyurethane resin through foamed polyurethane, so that the finished product is guaranteed to have soft, full and elastic handfeel, can achieve the wear-resisting effect of more than four grades, and has the advantages of cracking resistance and low temperature resistance; the polyurethane resin surface layer is made into a simulated cuticle layer and a simulated muscle bottom layer by adding pigments with different colors, so that the surface looks more real and rich in layers.
A production method of a simulated joint head layer cowhide comprises a polyurethane resin surface layer, wherein the polyurethane resin surface layer comprises a simulated muscle bottom layer and a simulated cuticle layer arranged on the simulated muscle bottom layer, and one surface of the simulated muscle bottom layer, which is opposite to the simulated cuticle layer, is bonded with the head layer cowhide through foamed polyurethane; firstly, grinding the surface of a first layer of cow leather bottom blank by 180# to 400# abrasive paper for the first time, then softening and vibrating the first layer of cow leather bottom blank, ironing, repairing the injury residue, grinding the leather for the second time by 600# to 800# abrasive paper, then softening and heating to 50 ℃ to 70 ℃ to control the water content of the leather to be 8 percent to 10 percent to form a first layer of cow leather; secondly, laying release paper, wherein leather-like depressions are formed in the release paper, wales simulating skin ravines are formed between every two adjacent leather-like depressions, 5% -10% of dark color pigment is added into polyurethane resin diluent containing 18% -22% of polyurethane resin and coated on the release paper, the coating thickness is 0.1mm-0.15mm, redundant polyurethane resin diluent is scraped to enable residual polyurethane resin diluent to be stored in the leather-like depressions, a simulated cuticle is formed after the polyurethane resin diluent is dried in an oven, 5% -10% of light color pigment is added into the polyurethane resin diluent containing 18% -22% of polyurethane resin and coated on the surface of the simulated cuticle layer, the coating thickness is 0.15mm-0.20mm, and the polyurethane resin diluent is dried in the oven to form a simulated muscle bottom layer; and thirdly, spraying foamed polyurethane with the thickness of 0.15-0.25 mm on the polyurethane resin surface layer, placing a first layer of cowhide above the foamed polyurethane after baking the polyurethane resin surface layer in an oven to be half-dried, attaching one surface of the first layer of cowhide subjected to secondary leather grinding to the foamed polyurethane, pressing the surface of the first layer of cowhide to be 0.8-1.2MPa/CM through a flat press at the temperature of 60-70 ℃ for attaching the surface of the first layer of cowhide for 0.5-1.5 s, baking the surface of the first layer of cowhide in the oven, stripping release paper, and curing the release paper to obtain the simulated attached first layer cowhide.
In the structure, the surface layer of the first layer cow leather bottom blank can be quickly leveled by primary leather grinding, so that the later period of repairing the damaged part is facilitated, the surface flatness is improved by secondary leather grinding after the repairing of the damaged part, the leather is further softened and the optimal 60 ℃ heating is selected to quickly control the moisture content, and preparation is made for later period of laminating; the release paper is printed with the imitated skin pits imitating skin textures, the production efficiency can be improved by spraying the polyurethane resin diluent at one time and drying the polyurethane resin diluent at a high speed, the deep color pigment is matched for imitating the surface of real skin, the polyurethane resin diluent is sprayed at a second time and is heated and dried step by step to reduce the generation of bubbles, and the light color pigment is matched for imitating more young epidermal gullies, so that the integral quality and the attractiveness of the whole polyurethane resin surface layer are improved; through the spraying foaming polyurethane after drying to half-dry, make it keep certain viscidity and support nature, thereby can avoid the excessive or too dark infiltration of foaming polyurethane to influence the compliance in the first cow hide in laminating upper strata, the platen press heats the laminating and can effectively improve the laminating firmness, especially the lower occasion of temperature can direct influence laminating quality, dry and peel off from type paper after the laminating is accomplished, make the burr line from type paper surface stay on the polyurethane resin top layer, obtain soft comfortable emulation laminating first cow hide through natural curing again.
The invention is further set that the drying temperature of the imitated cuticle is 90-100 ℃, and the drying time is 50-80 s; the bionic muscle bottom layer enters an oven to be sequentially heated and dried step by step at 85-95 ℃, 105-115 ℃ and 125-135 ℃, and the drying time is 20-40 s, 50-70 s and 50-70 s respectively.
In the structure, the polyurethane resin diluent is quickly dried when the imitated cuticle is formed by first coating, so that the production efficiency is improved; the polyurethane resin diluent is gradually heated and dried after being coated for the second time to form the bionic muscle bottom layer, and the aim is that the thickness of the polyurethane resin diluent is increased after the polyurethane resin diluent is coated for the second time, for example, cracks, folds, bubbles and other defects are easily generated by quick drying, and the gradual heating and drying is most suitable for slowing down the bubbles generated by drying.
The invention is further set that the drying temperature of the sprayed foaming polyurethane is 125-135 ℃, and the drying time is 50-70 s.
In the structure, the best drying temperature after the foamed polyurethane is sprayed is 130 ℃, and the best drying time is 60s, so that the semi-drying effect can be quickly achieved.
The invention is further set that after the first layer cowhide and the foaming polyurethane are pressed and jointed by a flat press, the first layer cowhide and the foaming polyurethane enter an oven to be sequentially heated and dried step by step at 125-130 ℃, 130-135 ℃ and 135-145 ℃, and the drying time is 50-70 s, 100-140 s and 100-140 s.
In the structure, the optimal temperature for drying in the oven is 125 ℃, 130 ℃ and 135 ℃; the drying time is preferably 60s, 120s and 120 s.
The invention is further set that the first layer cowhide and the foaming polyurethane are pressed and attached into the oven through the flat press, and then are dried, and the release paper is peeled after being cooled for 50-70 s to 15-25 ℃ through the cooling box.
In the structure, the best time of cooling through the cooling box is 60s, the best cooling temperature is 18 ℃ and then the release paper is peeled off, the step can be selected according to the type of the release paper, and if the release paper is easily shrunk during rapid cooling, natural cooling is required to be selected so as to reduce the influence of shrinkage on the polyurethane resin surface layer.
The invention is further set that after the release paper is peeled off, the simulated attaching head layer cowhide is obtained after 48 hours of solidification.
In the structure, the polyurethane resin surface layer is adhered to the first layer cowhide through foaming polyurethane, dried and then solidified for 48 hours to achieve the best bonding strength.
The invention is further arranged in such a way that before the flat press is pressed and attached, barrier paper is arranged on the surface of the foamed polyurethane in an area which is not covered by the first layer of cowhide.
In the structure, the situation that the foaming polyurethane on the release paper is not adhered to the flat press at the position where the foaming polyurethane is not adhered to the first layer cowhide during pressure fitting can be avoided, and waste paper such as newspaper can be selected as the separation paper, so that the production cost is reduced.
The invention is further configured that the polyurethane resin is high-physical-property water-based polyurethane resin; the foaming polyurethane is solvent-free polyurethane resin.
In the structure, the high-physical-property waterborne polyurethane resin is convenient to dissolve and dry, and has little influence on the body of an operator during volatilization.
The invention has the beneficial effects that: the production process is simple, convenient and quick, and is more environment-friendly compared with the existing leather production mode; the finished product has soft, full and elastic hand feeling, the color is wear-resistant to more than 4 grades (the level of a coated product is 2.5), the product has no cracking after being bent for 10 ten thousand at normal temperature (the coated product has poor hand feeling of 10 ten thousand), the product can be bent for more than 2 ten thousand times at the low temperature of-20 ℃ (the coated product can be only coated for 1 ten thousand times), the utilization rate is improved by more than 50 percent, and the surface of the product is not discolored after being cleaned by liquid detergents such as laundry detergent, liquid detergent and the like (the; and the surface of the finished product shows the gully of the skin epidermis through color difference, and the appearance can be more real through matching different color matching.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a schematic top view of the bonding process of the platen press according to the present invention.
FIG. 3 is an enlarged view of the portion A of FIG. 1 according to the present invention.
FIG. 4 is a schematic process flow diagram of the present invention.
The reference numbers in the figures mean: 10-first layer cowhide; 11-a polyurethane resin surface layer; 111-simulated muscle bottom layer; 112-simulated stratum corneum; 12-foamed polyurethane; 13-release paper; 131-imitation leather concave; 132-wale; 14-barrier paper.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, the simulated fitting head cowhide shown in fig. 1 to 3 comprises a head cowhide 10 and a polyurethane resin surface layer 11, wherein the polyurethane resin surface layer 11 comprises a simulated muscle bottom layer 111 and a simulated horny layer 112 arranged on the simulated muscle bottom layer 111, and one surface of the simulated muscle bottom layer 111 opposite to the simulated horny layer 112 is adhered to the head cowhide 10 through foamed polyurethane 12.
In the structure, the first layer cow leather 10 is bonded and attached to the polyurethane resin surface layer 11 through the foamed polyurethane 12, so that the finished product is soft, full and elastic in hand feeling, can achieve the wear-resisting effect of more than four grades, and has the advantages of cracking resistance and low temperature resistance; the polyurethane resin surface layer 11 is made of the simulated horny layer 112 and the simulated muscle bottom layer 111 by adding different colors of pigments, so that the surface looks more real and rich in gradation.
As shown in fig. 1 to 4, the method for producing the simulated attaching head layer cowhide comprises a polyurethane resin surface layer 11, the polyurethane resin surface layer 11 comprises a simulated muscle bottom layer 111 and a simulated cuticle layer 112 arranged on the simulated muscle bottom layer 111, and one surface of the simulated muscle bottom layer 111 opposite to the simulated cuticle layer 112 is adhered and attached to the head layer cowhide 10 through foamed polyurethane 12; firstly, grinding the surface of a first layer of cow leather bottom blank by 180# to 400# abrasive paper for the first time, then softening and vibrating the first layer of cow leather bottom blank, ironing, repairing the injury residue, grinding the leather for the second time by 600# to 800# abrasive paper, then softening and heating to 50 ℃ to 70 ℃ to control the water content of the leather to be 8 percent to 10 percent to form a first layer of cow leather 10; secondly, laying release paper 13, wherein leather-like depressions 131 are formed in the release paper 13, ribs 132 imitating skin ravines are formed between adjacent leather-like depressions 131, polyurethane resin diluent containing 18% -22% of polyurethane resin is added with 5% -10% of dark color pigment and coated on the release paper 13, the coating thickness is 0.1mm-0.15mm, excess polyurethane resin diluent is scraped off to enable residual polyurethane resin diluent to be stored in the leather-like depressions 131, the mixture is dried in an oven to form an imitated horny layer 112, polyurethane resin diluent containing 18% -22% of polyurethane resin is added with 5% -10% of light color pigment and coated on the surface of the imitated horny layer 112, the coating thickness is 0.15mm-0.20mm, and the mixture is dried in the oven to form an imitated muscle bottom layer 111; and thirdly, spraying foamed polyurethane 12 with the thickness of 0.15-0.25 mm on the polyurethane resin surface layer 11, placing the first layer cowhide 10 above the foamed polyurethane 12 after baking the polyurethane resin surface layer in an oven to be half-dried, attaching one surface of the first layer cowhide 10 subjected to secondary leather grinding to the foamed polyurethane 12, pressurizing the surface to be attached for 0.8-1.2MPa/CM at the temperature of 60-70 ℃ by using a flat press, keeping the pressure for attachment for 0.5-1.5 s, then baking the surface in the oven, stripping release paper 13, and curing to obtain the simulated attached first layer cowhide.
In the structure, the surface layer of the first layer cow leather bottom blank can be quickly leveled by primary leather grinding, so that the later period of repairing the damaged part is facilitated, the surface flatness is improved by secondary leather grinding after the repairing of the damaged part, the leather is further softened and the optimal 60 ℃ heating is selected to quickly control the moisture content, and preparation is made for later period of laminating; the release paper 13 is printed with the imitated skin recesses 131 imitating skin textures, the production efficiency can be improved by spraying polyurethane resin diluent at one time and drying the polyurethane resin diluent quickly, the dark pigment is used for imitating the surface of real skin, the polyurethane resin diluent is sprayed at the second time and is heated and dried step by step to reduce bubbles, and the light pigment is used for imitating young skin gullies, so that the overall quality and the attractiveness of the whole polyurethane resin surface layer 11 are improved; baking to half-dry through spraying foaming polyurethane 12 after, make it keep certain viscidity and support nature, thereby can avoid foaming polyurethane 12 excessive or too dark infiltration to influence the compliance in the first layer cow hide 10 when laminating the first layer cow hide 10, the laminating firmness can effectively be improved in the laminating of platen press heating laminating, especially the lower occasion of temperature can direct influence laminating quality, dry after the laminating is accomplished and peel off from type paper 13, make the burr 132 from type paper 13 surface stay on polyurethane resin top layer 11, obtain soft comfortable emulation laminating first layer cow hide through natural curing again.
In the embodiment, the drying temperature of the imitated horny layer 112 is 90-100 ℃, and the drying time is 50-80 s; the bionic muscle bottom layer 111 enters an oven to be sequentially heated and dried step by step at 85-95 ℃, 105-115 ℃ and 125-135 ℃, and the drying time is 20-40 s, 50-70 s and 50-70 s respectively.
In the structure, the polyurethane resin diluent is quickly dried when the imitated horny layer 112 is formed by first coating, so that the production efficiency is improved; the polyurethane resin diluent is gradually heated and dried after the second coating to form the artificial muscle bottom layer 111, and the aim is to increase the thickness of the artificial muscle bottom layer after the second coating, such as cracks, folds, bubbles and other defects easily caused by quick drying, and the gradual heating and drying is most suitable for slowing down the bubbles generated by drying.
In the embodiment, the drying temperature of the sprayed foamed polyurethane 12 is 125-135 ℃, and the drying time is 50-70 s.
In the structure, the best drying temperature after the foaming polyurethane 12 is sprayed is 130 ℃, and the best drying time is 60s, so that the semi-drying effect can be quickly achieved.
In the embodiment, the first layer cowhide 10 and the foamed polyurethane 12 are pressed and attached by a flat press, and then enter an oven to be sequentially heated and dried step by step at 125-130 ℃, 130-135 ℃ and 135-145 ℃, wherein the drying time is 50-70 s, 100-140 s and 100-140 s.
In the structure, the optimal temperature for drying in the oven is 125 ℃, 130 ℃ and 135 ℃; the drying time is preferably 60s, 120s and 120 s.
In the embodiment, the first layer cowhide 10 and the foamed polyurethane 12 are pressed and attached into an oven through a flat press, dried, cooled by a cooling box for 50-70 s to 15-25 ℃, and then stripped from the release paper 13.
In the above structure, the time for cooling through the cooling box is preferably 60s, and the cooling temperature is preferably 18 ℃ before peeling off the release paper 13, and this step can be selected according to the type of the release paper 13, and if the release paper 13 is easily shrunk during rapid cooling, natural cooling is required to reduce the influence of shrinkage on the polyurethane resin surface layer 11.
In this embodiment, the release paper 13 is peeled off and cured for 48 hours to obtain the simulated laminated first layer cowhide.
In the structure, the polyurethane resin surface layer 11 is adhered to the first layer cowhide 10 through the foaming polyurethane 12, dried and then cured for 48 hours to achieve the best bonding strength.
In this embodiment, before the flat press is pressed and attached, the blocking paper 14 is disposed on the surface of the foamed polyurethane 12 in the area not covered by the first layer cowhide 10.
In the structure, the foamed polyurethane 12 on the release paper 13 can be prevented from being adhered to the flat press at the part which is not adhered to the first layer cowhide 10 during pressure adhesion, and the barrier paper 14 can be selected from waste paper such as newspaper and the like, so that the production cost is reduced.
In this embodiment, the polyurethane resin is a high-physical-property aqueous polyurethane resin; the foamed polyurethane 12 is a solvent-free polyurethane resin.
In the structure, the high-physical-property waterborne polyurethane resin is convenient to dissolve and dry, and has little influence on the body of an operator during volatilization.
The invention has the beneficial effects that: the production process is simple, convenient and quick, and is more environment-friendly compared with the existing leather production mode; the finished product has soft, full and elastic hand feeling, the color is wear-resistant to more than 4 grades (the level of a coated product is 2.5), the product has no cracking after being bent for 10 ten thousand at normal temperature (the coated product has poor hand feeling of 10 ten thousand), the product can be bent for more than 2 ten thousand times at the low temperature of-20 ℃ (the coated product can be only coated for 1 ten thousand times), the utilization rate is improved by more than 50 percent, and the surface of the product is not discolored after being cleaned by liquid detergents such as laundry detergent, liquid detergent and the like (the; and the surface of the finished product shows the gully of the skin epidermis through color difference, and the appearance can be more real through matching different color matching.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.

Claims (9)

1. The utility model provides a first layer cow hide of emulation laminating, includes first layer cow hide, its characterized in that: still include the polyurethane resin top layer, the polyurethane resin top layer includes the imitative flesh bottom and sets up the imitative cuticle on the imitative flesh bottom, through the bonding of foaming polyurethane bonding between imitative flesh bottom and the relative one side of imitative cuticle and the first layer cow hide.
2. A production method of simulated laminated first layer cowhide is characterized in that: the simulated joint head layer cowhide comprises a polyurethane resin surface layer, the polyurethane resin surface layer comprises a simulated muscle bottom layer and a simulated cuticle layer arranged on the simulated muscle bottom layer, and one surface of the simulated muscle bottom layer, which is opposite to the simulated cuticle layer, is adhered to the head layer cowhide through foamed polyurethane; firstly, grinding the surface of a first layer of cow leather bottom blank by 180# to 400# abrasive paper for the first time, then softening and vibrating the first layer of cow leather bottom blank, ironing, repairing the injury residue, grinding the leather for the second time by 600# to 800# abrasive paper, then softening and heating to 50 ℃ to 70 ℃ to control the water content of the leather to be 8 percent to 10 percent to form a first layer of cow leather; secondly, laying release paper, wherein leather-like depressions are formed in the release paper, wales simulating skin ravines are formed between every two adjacent leather-like depressions, 5% -10% of dark color pigment is added into polyurethane resin diluent containing 18% -22% of polyurethane resin and coated on the release paper, the coating thickness is 0.1mm-0.15mm, redundant polyurethane resin diluent is scraped to enable residual polyurethane resin diluent to be stored in the leather-like depressions, a simulated cuticle is formed after the polyurethane resin diluent is dried in an oven, 5% -10% of light color pigment is added into the polyurethane resin diluent containing 18% -22% of polyurethane resin and coated on the surface of the simulated cuticle layer, the coating thickness is 0.15mm-0.20mm, and the polyurethane resin diluent is dried in the oven to form a simulated muscle bottom layer; and thirdly, spraying foamed polyurethane with the thickness of 0.15-0.25 mm on the polyurethane resin surface layer, placing a first layer of cowhide above the foamed polyurethane after baking the polyurethane resin surface layer in an oven to be half-dried, attaching one surface of the first layer of cowhide subjected to secondary leather grinding to the foamed polyurethane, pressing the surface of the first layer of cowhide to be 0.8-1.2MPa/CM through a flat press at the temperature of 60-70 ℃ for attaching the surface of the first layer of cowhide for 0.5-1.5 s, baking the surface of the first layer of cowhide in the oven, stripping release paper, and curing the release paper to obtain the simulated attached first layer cowhide.
3. The method for producing the simulated fitted top layer cowhide according to claim 2, wherein the method comprises the following steps: the drying temperature of the imitated cuticle is 90-100 ℃, and the drying time is 50-80 s; the bionic muscle bottom layer enters an oven to be sequentially heated and dried step by step at 85-95 ℃, 105-115 ℃ and 125-135 ℃, and the drying time is 20-40 s, 50-70 s and 50-70 s respectively.
4. The method for producing the simulated fitted top layer cowhide according to claim 2, wherein the method comprises the following steps: the drying temperature of the sprayed foamed polyurethane is 125-135 ℃, and the drying time is 50-70 s.
5. The method for producing the simulated fitted top layer cowhide according to claim 2, wherein the method comprises the following steps: after the first layer cowhide and the foamed polyurethane are pressed and attached through a flat press, the first layer cowhide and the foamed polyurethane enter an oven to be sequentially heated and dried step by step at 125-130 ℃, 130-135 ℃ and 135-145 ℃, and the drying time is 50-70 s, 100-140 s and 100-140 s in sequence.
6. The method for producing the simulated fitted top layer cowhide according to claim 2, wherein the method comprises the following steps: and the first layer cowhide and the foamed polyurethane are pressed and attached into an oven through a flat press, dried, cooled for 50-70 s to 15-25 ℃ through a cooling box, and then the release paper is peeled.
7. The method for producing the simulated fitted top layer cowhide according to claim 6, wherein the method comprises the following steps: and (5) stripping the release paper, and curing for 48 hours to obtain the simulated attaching head layer cowhide.
8. The method for producing the simulated fitted top layer cowhide according to claim 2, wherein the method comprises the following steps: before the flat press is pressed and attached, barrier paper is arranged on the area, which is not covered by the first layer of cowhide, on the surface of the foamed polyurethane.
9. The method for producing the simulated fitted top layer cowhide according to claim 2, wherein the method comprises the following steps: the polyurethane resin is high-physical-property water-based polyurethane resin, and the foaming polyurethane is solvent-free polyurethane resin.
CN202010036607.0A 2020-01-14 2020-01-14 Simulated laminated first layer cowhide and production method thereof Pending CN111231446A (en)

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CN108472919A (en) * 2015-11-27 2018-08-31 康拉德霍恩舒赫公司 Method for manufacturing composite material and composite material
CN108729248A (en) * 2018-05-21 2018-11-02 昆山阿基里斯人造皮有限公司 A kind of high-fidelity color method of artificial leather
CN109849451A (en) * 2019-01-18 2019-06-07 温州凯信实业有限公司 A kind of fitting head layer ox-hide and its production method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101748613A (en) * 2009-12-18 2010-06-23 安徽安利合成革股份有限公司 Method for producing real leather intimating polyurethane synthetic leather
CN104195841A (en) * 2014-09-18 2014-12-10 福建宝利特集团有限公司 Soft PU (Polyurethane/PVC (Polyvinyl Chloride) tinted synthetic leather and preparation method thereof
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Application publication date: 20200605