TWI798048B - Method of making leather texture - Google Patents

Abstract

The present invention provides a method for producing leather textures. Firstly, the leather material added with multiple foaming agents is prepared. The foaming temperature of each foaming agent is three different foaming temperatures. The curing equipment heats and presses the leather material simultaneously, so that the foaming agent with the first foaming temperature is foamed first, so that the leather material is partially matured and a first texture is formed on the surface, and then matured by a second heat press The equipment heats and presses the leather material synchronously to make the foaming agent with the second foaming temperature foam, so that the leather material is partially matured and a second texture superimposed on the first texture is formed on the surface. Finally, The leather material is heated and pressurized synchronously by using the first hot-press curing equipment, so that the foaming agent with the third foaming temperature is foamed, so that the leather material is fully matured and formed superimposed on the surface of the first and second foaming agents. A third texture of the texture is used to form a multi-layered texture, and the time for the second hot-press curing device to heat-press the leather material is different from the time for the first heat-press curing device to heat-press the leather material.

Description

Method of making leather texture

The present invention is related to the technical field of leather manufacturing, and more specifically refers to a method for making leather textures.

According to the considerations of price, convenience of use and animal protection, the commercial application of artificial leather is not lower than that of natural leather. Artificial leather (synthetic leather/artificial leather) mostly uses non-woven fabric as the base, and uses an adhesive to stick a layer of resin (such as polyurethane PU and polyvinyl chloride PVC, etc.) on the surface of the base or wrap resin on a special non-woven fabric.

The modification and processing of the surface (resin layer) of synthetic leather can improve the degree of imitation of natural leather and the product grade. The surface modification and processing steps of conventional synthetic leather include printing, embossing, roller coating, spraying, polishing, rubbing, bronzing, laminating, flocking, laminating, punching, etc. Among them, the embossing step is to use an embossing machine's embossed roller or pattern to apply pressure to the leather surface under a certain temperature condition (the resin layer is softened), so that the resin layer undergoes irreversible deformation, and the synthetic leather surface produces lines. The kneading step is to place the synthetic leather in a kneading machine, so that the synthetic leather is continuously subjected to tumbling, throwing, collision, friction and extrusion, as well as the effects of water and temperature, so that the resin layer produces natural creases, which can improve the texture of the leather. Synthetic leather simulates the degree of natural leather.

It is known that synthetic leather uses an adhesive to bond the resin layer and non-woven fabric. Not only is it easy to produce water and air pollution during the production process, but also, after embossing the synthetic leather with an embossing machine, the synthetic leather needs to be moved to the kneading machine for tanning. Skin, the process seems troublesome.

The reason is, based on the inventor's years of experience in the research and development of synthetic leather, he developed the invention of "Leather Texture Production Method", which can solve the shortcomings of the aforementioned conventional synthetic leather production process.

The main purpose of the present invention is to provide a method for producing leather texture, which does not have the water and air pollution produced in the conventional synthetic leather production process, and the production process is simple, and can form multi-layered and rich lines on the leather surface, which can be effectively simulated. Natural leather, moreover, the change of texture is very flexible, which is of great practical value.

The reason is that, in order to achieve the aforementioned purpose, the present invention provides a method for making leather textures, the steps of which at least include: getting leather materials: getting leather materials added with a plurality of foaming agents, and the hair of each foaming agent The foaming temperature is one of different first foaming temperature, one second foaming temperature and one third foaming temperature; the first embossing aging: using a first hot pressing aging equipment to heat and heat the leather material synchronously Pressing, so that the foaming agent with the first foaming temperature is foamed first, so that the leather material is partially matured and a first texture is formed on the surface; the second embossed aging: use a second hot pressing aging equipment to the leather The material is heated and pressurized synchronously to make the foaming agent with the second foaming temperature foam, so that the leather material is partially matured and a second texture is formed on the surface, and the second texture is superimposed In the first texture; the third embossing aging: use the first hot-press aging equipment to heat and press the leather material synchronously, so that the foaming agent with the third foaming temperature is foamed, so that the leather material is fully aged And a third texture is formed on the surface, and the third texture is superimposed on the first and second textures to synthesize multi-level textures.

Preferably, the first and second embossing aging steps are to age the leather material by 80%.

Preferably, the first embossing aging step is to age the leather material by 60%, and the second embossing aging step is to age the leather material by 20%.

Preferably, the first embossing aging step is to age the leather material by 20%, and the second embossing aging step is to age the leather material by 60%.

Preferably, the time for the first heat-pressing device to heat-press the leather material is longer than the time for the second heat-press device to heat-press the leather material.

Preferably, the time for the first heat-pressing device to heat-press the leather material is shorter than the time for the second heat-press device to heat-press the leather material.

Preferably, the first hot-press aging equipment is one of flat-plate hot-press forming equipment or crawler-type roller continuous hot-press bonding equipment, and the second hot-press ripening equipment includes a rolling machine and an oven.

Preferably, the first hot-press aging equipment includes a rolling mill and an oven, and the second hot-press aging equipment is one of flat-plate hot-press forming equipment or crawler-type roller continuous hot-press bonding equipment.

Preferably, in the step of embossing for the first time, the temperature of the first foaming is 100 to 120 degrees Celsius, and in the step of embossing for the second time, the temperature of the second foaming is 140 degrees Celsius , in the step of embossing for the third time, the temperature of the third foaming is 160 degrees centigrade.

Preferably, in the step of preparing the leather material, the leather material comprises a leather layer and a bottom layer, each of the foaming agents is added to the leather layer or/and the bottom layer, and the leather layer and the bottom layer use a foaming agent The gas force generated by the foaming sticks together, and the first, second and third lines are formed on the leather layer.

100: Method of making leather texture

110: Prepare leather materials

120: The first embossed aging

130: The second embossed aging

140: The third embossed aging

The first figure is a flow chart of a preferred embodiment of the present invention.

The second figure is a schematic diagram of the embossing time of the first, second and third embossing aging steps in a preferred embodiment of the present invention.

The third figure is a schematic diagram of the embossing time of the first, second and third embossing aging steps in another preferred embodiment of the present invention.

Hereinafter, two preferred embodiments of the present invention are cited, and further detailed descriptions are made in conjunction with the drawings as follows:

First of all, please refer to the first figure and the second figure, the leather texture method 100 of a preferred embodiment of the present invention, the first step is to prepare the leather material 110: prepare the leather material added with three foaming agents , each of the foaming agents has different foaming (decomposition) temperatures, respectively having a first foaming temperature (100 degrees Celsius to 120 degrees Celsius), a second foaming temperature (140 degrees Celsius) and a first foaming temperature Three foaming temperatures (160 degrees Celsius), such as known blowing agents with different foaming temperatures such as azodicarbonamide (ADC/AC), oxybisbenzenesulfonylhydrazine, and benzenesulfonylhydrazine, but not limited , each of the foaming agents can also add foaming aids to adjust the foaming temperature as required. The leather material comprises a leather layer and a bottom layer (not shown in the figure), and the leather layer is an elastic foam material (natural rubber or Plastic material) or artificial leather sheet made of animal leather, the bottom layer can be a sheet made of cloth or elastic foam material, such as vegetable leather, recycled leather, natural environmental protection leather and natural rubber leather, the leather layer of vegetable leather is The emulsion extracted from plants (such as purified rubber latex, peach gum or pine gum) is blended with natural materials such as plant tannins. The bottom layer is woven from natural fibers. The leather layer of waste recycled leather is made of plastic bottles, nylon, Cardboard, rubber, cork, etc. are recycled and recycled. The bottom layer is made of automotive glass interlayer material PVB. The leather layer of natural environmental protection leather is animal split skin, and the bottom layer is made of latex foam extracted from plants. The leather layer of natural rubber leather It is made of natural rubber, artificial rubber or composite rubber, and the bottom layer is made of artificial fiber or a blend of natural and artificial fiber. Each of the foaming agents is added to the leather layer or/and the bottom material, and three or more foaming agents can be used.

The second step of the present invention is the first embossing aging 120: mainly using a first hot pressing aging equipment to simultaneously heat and pressurize the leather material. The first hot pressing aging equipment is a conventional flat hot pressing forming equipment Or crawler-type roller continuous hot pressing and bonding equipment (the mold is preset in the equipment to form embossing on the surface of the leather layer), which can apply heat of 100 to 120 degrees Celsius to the input leather material for a long time The pressure (such as hot pressing for several minutes, depending on the aging speed of the leather material composition material, can be pre-heated in the first hot pressing The aging equipment sets the applied pressure and time), so that the leather layer and the bottom layer of the leather material can be glued together by the gas force generated by the foaming agent (at this time, the heat applied to the leather material by the first hot-press aging equipment The second and third foaming temperatures have not been reached, therefore, the other two foaming agents with higher foaming temperatures have not yet foamed) and are partially matured (60% matured), and a first grain can be formed on the surface of the leather layer ( For example, release paper texture, etc., not shown in the figure).

The third step of the present invention is the second embossing aging 130: it uses a second hot pressing aging equipment to heat and press the leather material synchronously. A rolling machine for embossing and maturing the foam material and an oven (the surface of the rollers of the rolling machine is preset with lines that can form embossing on the surface of the leather layer), which can apply short-term pressure to the leather material input into the rolling machine ( The time for the leather material to be rolled by the rolling machine is only a short time compared to the hot-pressing time of the first hot-pressing aging equipment for a few minutes), and then the leather material is passed through the oven to apply heat above 140 degrees Celsius, so that the The leather layer and the bottom layer of the leather material can continue to use the gas force generated by the foaming agent to increase the adhesive strength (the heat applied to the leather material by the foaming box does not reach the third foaming temperature, so another foaming temperature is higher. The foaming agent has not yet foamed) and continue to partially mature (recure 20%, so that the leather material can be matured by 80%), and apply pressure on the surface of the leather layer to superimpose a second pattern on the first pattern (such as steel wheel pattern etc., not shown in the figure).

The fourth step of the present invention is the third embossing aging 140: the leather material is heated and pressurized synchronously by using the first heat-pressing aging equipment, and the input leather material can be given heat and temperature above 160 degrees Celsius. The pressure for a long time makes the foaming agent with the third foaming temperature foam in the leather material, so that The leather layer and the bottom layer can continue to use the gas force produced by the foaming agent to stick together, and make the leather material fully mature and form a third texture superimposed on the first and second textures on the surface (such as release Cloth pattern, etc., not shown in the figure), each of the first, second and third textures can form multi-layered textures, and accordingly, after cooling, leather with multi-layered and rich textures can be obtained.

As can be seen from the above, the three embossing aging steps of the first embossing aging 120, the second embossing aging 130 and the third embossing aging 140 of the manufacturing method of the present invention can make the leather material be embossed for a long time respectively. , Short-time embossing and long-time embossing alternate embossing action at different times, combined with the three embossing aging steps that are carried out simultaneously at different temperatures and multi-stage foaming aging, not only can the leather layer be bonded without adhesive With the bottom layer, there is no conventional synthetic leather that needs to be bonded with an adhesive, which is prone to water and air pollution. Moreover, the texture of the leather surface is formed by superimposing the first, second and third textures, which can present Multi-layered and rich texture patterns produce embossed and tanned leather effects (for example, the first and second textures constitute embossed textures, and the third texture is the texture pattern of tanned leather), compared with conventional synthetic leather After embossing, the leather needs to be tanned to imitate the production method of natural leather. The manufacturing process of the present invention is simpler, and the step of synchronous embossing and aging is also simpler than the step of embossing and then tanning the conventional synthetic leather. The embossing and ripening 120, 130, 140 steps of the texture mold, pressure and time can be adjusted, and the design of the texture is very flexible, which is of great practical value.

Next, as shown in the third figure, the three embossing aging steps of the first embossing aging 120, the second embossing aging 130 and the third embossing aging 140 in the manufacturing method of the present invention can also be respectively used The leather material is subjected to short-time embossing (using the first hot-press aging equipment), long-time embossing (using the second Hot pressing curing equipment) and short-time embossing (using the first hot pressing curing equipment) embossing effect at different times, based on this, the surface can also have textures formed by superimposing the first, second and third textures The leather, and the embossing pressure and time can be adjusted to make the elastic effect of the texture changeable.

It must be mentioned that the embossing aging steps of the method of the present invention are not limited to three times, and several embossing aging steps can be added depending on the richness of the leather surface texture. It only needs to alternate long and short time embossing (For example, if the third embossing aging step is short-time embossing, the fourth embossing aging step is long-time embossing, if the third embossing aging step is long-time embossing, then the fourth embossing aging step is embossing The four embossing aging steps are short-time embossing), and the time for each embossing aging step can be adjusted according to the needs of leather aging.

The above descriptions are only some preferred embodiments of the present invention, and are not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some modifications without departing from the spirit and scope of the present invention. Changes and modifications, so the scope of protection of the present invention should be defined by the scope of the appended patent application.

100: Method of making leather texture

110: Prepare leather materials

120: The first embossed aging

130: The second embossed aging

140: The third embossed aging

Claims (10)

A method for preparing leather texture, the steps at least include: Prepare leather materials: prepare leather materials added with multiple foaming agents, each foaming agent can produce a different first foaming temperature, a second foaming temperature and a third foaming temperature; The first embossing aging: use a first hot pressing aging equipment to heat and press the leather material synchronously, so that the foaming agent with a first foaming temperature will be foamed first, so that the leather material is partially aged and formed on the surface forming a first texture; The second embossing aging: Utilize a second hot pressing aging equipment to heat and press the leather material synchronously to make the foaming agent with a second foaming temperature foam, so that the leather material is partially aged again and formed on the surface A second texture superimposed on the first texture is formed, the second foaming temperature is higher than the first foaming temperature, and the time for the second hot-press aging device to heat-press the leather material is the same as the time for the first heat-press aging device to heat-press the leather the timing of the materials differs; and The third embossing aging: Utilize the first hot-press aging equipment to heat and press the leather material synchronously to make the foaming agent with a third foaming temperature foam, so that the leather material is fully aged and formed on the surface The third texture is superimposed on one of the first and second textures to form a multi-layered texture, and the temperature of the third foaming is higher than the second foaming temperature, so that a leather with multi-layered textures can be obtained. The method for making leather textures as described in claim 1, wherein the first and second embossing aging steps are to age the leather material by 80%. The method for producing leather textures as described in Claim 2, wherein the first embossing aging step is to age the leather material by 60%, and the second embossing aging step is to age the leather material by 20%. The method for producing leather textures as described in Claim 2, wherein the first embossing aging step is to age the leather material by 20%, and the second embossing aging step is to age the leather material by 60%. The method for producing leather textures according to claim 3, wherein the time for the first heat-pressing device to heat-press the leather material is longer than the time for the second heat-pressing device to heat-press the leather material. The method for producing leather textures as described in Claim 4, wherein the time for the first heat-pressing device to heat-press the leather material is shorter than the time for the second heat-pressing device to heat-press the leather material. The method for producing leather textures as described in Claim 5, wherein the first hot-press curing equipment is one of flat-plate hot-press forming equipment or crawler-type roller continuous hot-press bonding equipment, and the second hot-press curing equipment includes a A rolling mill and an oven. The method for producing leather textures as described in Claim 6, wherein the first hot-press aging equipment includes a rolling mill and an oven, and the second hot-press aging equipment is flat-plate hot-press forming equipment or crawler-type roller continuous hot pressing One of hot bonding equipment. The method for producing leather textures as described in Claim 1, wherein, in the step of embossing and aging for the first time, the temperature of the first foaming is 100 to 120 degrees Celsius, and in the step of embossing and aging for the second time, The second foaming temperature is 140 degrees Celsius, and in the step of embossing for the third time, the third foaming temperature is 160 degrees Celsius. The method for producing leather texture as described in Claim 1, wherein, in the step of preparing the leather material, the leather material comprises a leather layer and a bottom layer, and each foaming agent is added to the leather layer or/and the bottom layer, The leather layer and the bottom layer are glued together by the gas force produced by the foaming agent, and the first, second and third lines are formed on the leather layer.

Images