阅读说明：本技术 一种超纤革与热熔胶膜的预贴合工艺 (Pre-laminating process of microfiber leather and hot melt adhesive film ) 是由 丁家辉 于 2021-07-30 设计创作，主要内容包括：一种超纤革与热熔胶膜的预贴合工艺,热熔胶膜包括离型纸和设置在离型纸上的胶层,包括以下步骤：步骤一,将热熔胶膜的胶层与超纤革贴合对齐；步骤二,利用压烫设备在离型纸一侧进行加温熨烫,让温度传递到胶层以使热熔胶黏合于超纤革上；步骤三,将贴合热熔胶膜的超纤革经冷却设备进行冷却后,以完成超纤革与热熔胶膜的预贴合；本申请通过在超纤革表面复合一层带离型纸的热熔胶膜,以得到超纤革半成品,与其他面料或基体复合时,撕离离型纸,就可直接与其他面料复合。(A pre-laminating process of microfiber leather and a hot melt adhesive film comprises the following steps: firstly, gluing and aligning a glue layer of a hot melt adhesive film with microfiber leather; heating and ironing one side of the release paper by using pressing equipment, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather; step three, cooling the microfiber leather attached with the hot melt adhesive film by cooling equipment to finish pre-attaching the microfiber leather and the hot melt adhesive film; this application is through compounding a layer area in microfiber leather surface from the hot melt adhesive membrane of type paper to obtain microfiber leather semi-manufactured goods, when compounding with other surface fabrics or base member, tear and leave type paper, just can directly compound with other surface fabrics.)

1. The pre-laminating process of the microfiber leather and the hot melt adhesive film comprises release paper and an adhesive layer arranged on the release paper, and is characterized in that: the method comprises the following steps:

firstly, gluing and aligning a glue layer of a hot melt adhesive film with microfiber leather;

heating and ironing one side of the release paper by using pressing equipment, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather;

step three, cooling the microfiber leather attached with the hot melt adhesive film by cooling equipment to finish pre-attaching the microfiber leather and the hot melt adhesive film;

the adhesive layer is composed of the following raw materials in parts by weight: 70-80 parts of ethylene-methacrylate copolymer, 15-22 parts of maleic anhydride grafted polypropylene, 6-8 parts of oxidized polyethylene wax, 3-5 parts of ethylene distearamide, 2-5 parts of tin isooctyl dimercaptodimethylacetate, 1-3 parts of dodecahydroxystearic acid, 8-15 parts of oyster shell powder, 5-10 parts of silica powder and 3-6 parts of 2, 6-di-tert-butyl-p-cresol.

2. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 1, wherein the pre-laminating process comprises the following steps: the hot pressing equipment comprises three hot pressing roller sets arranged at intervals in sequence, the hot pressing roller sets comprise lower hot pressing rollers used for supporting microfiber leather and upper hot pressing rollers arranged above the lower hot pressing rollers and used for hot pressing hot melt adhesive films, and channels for the microfiber leather and the hot melt adhesive films to pass through are formed between the upper hot pressing rollers and the lower hot pressing rollers.

3. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 2, wherein the pre-laminating process comprises the following steps: the temperature difference between the upper hot-pressing roller and the opposite lower hot-pressing roller is 25-35 ℃.

4. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 3, wherein the pre-laminating process comprises the following steps: the temperature of the upper hot pressing roller of the first hot pressing roller group is 70 ℃, the temperature of the upper hot pressing roller of the second hot pressing roller group is 90 ℃, and the temperature of the upper hot pressing roller of the third hot pressing roller group is 110 ℃.

5. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 4, wherein the pre-laminating process comprises the following steps: the upper hot press rolls of the first hot press roll group are rolled to 3kgf, the upper hot press rolls of the second hot press roll group are rolled to 2.5kgf, and the upper hot press rolls of the third hot press roll group are rolled to 2 kgf.

6. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 1, wherein the pre-laminating process comprises the following steps: the cooling device comprises four cooling roller sets which are arranged at the rear of the pressing device at intervals in sequence, the cooling roller sets comprise lower cooling rollers used for supporting the microfiber leather and upper cooling rollers arranged above the lower cooling rollers and used for cold-pressing the hot melt adhesive film, and cooling channels for the microfiber leather and the hot melt adhesive film to pass through are formed between the upper cooling rollers and the lower cooling rollers.

7. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 6, wherein the pre-laminating process comprises the following steps: the temperature of the first cooling roller group is 70 ℃, the temperature of the second cooling roller group is 45 ℃, the temperature of the third cooling roller group is 20 ℃, and the temperature of the fourth cooling roller group is 10 ℃.

8. The pre-laminating process of the microfiber leather and the hot melt adhesive film according to claim 7, wherein the pre-laminating process comprises the following steps: the roll pressure of the upper cooling rolls of the first cooling roll group is 4kgf, the roll pressure of the upper cooling rolls of the second cooling roll group is 5kgf, the roll pressure of the upper cooling rolls of the third cooling roll group is 6kgf, and the roll pressure of the upper cooling rolls of the fourth cooling roll group is 6 kgf.

Technical Field

The invention belongs to the field of microfiber leather fabric treatment, and particularly relates to a pre-laminating process of microfiber leather and a hot melt adhesive film.

Background

The microfiber leather is a novel high-grade artificial leather made of superfine fibers, can be used in various fields such as shoes, bags, furniture and the like, and has a vivid leather simulation effect. With the improvement and progress of leather production technology, the requirements of people on quality are high, especially the development of imitation genuine leather in recent years, and the market demand of microfiber close to genuine leather is increasing rapidly.

When the microfiber leather is compounded with other fabrics or substrates, a layer of adhesive needs to be compounded between the microfiber leather and other fabrics or substrates to obtain the required fabrics or articles.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a pre-laminating process of microfiber leather and a hot melt adhesive film.

The invention adopts the following technical scheme:

a pre-laminating process of microfiber leather and a hot melt adhesive film comprises the following steps:

firstly, gluing and aligning a glue layer of a hot melt adhesive film with microfiber leather;

heating and ironing one side of the release paper by using pressing equipment, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather;

step three, cooling the microfiber leather attached with the hot melt adhesive film by cooling equipment to finish pre-attaching the microfiber leather and the hot melt adhesive film;

the adhesive layer is composed of the following raw materials in parts by weight: 70-80 parts of ethylene-methacrylate copolymer, 15-22 parts of maleic anhydride grafted polypropylene, 6-8 parts of oxidized polyethylene wax, 3-5 parts of ethylene distearamide, 2-5 parts of tin isooctyl dimercaptodimethylacetate, 1-3 parts of dodecahydroxystearic acid, 8-15 parts of oyster shell powder, 5-10 parts of silica powder and 3-6 parts of 2, 6-di-tert-butyl-p-cresol.

Further, the equipment is scalded including the three hot pressing roller set that sets up in proper order the interval, and hot pressing roller set is including the lower hot pressing roller that is used for supporting super fine leather and the last hot pressing roller that sets up the hot-pressing hot-melt adhesive membrane of hot-pressing roller top under, go up the hot pressing roller and form the passageway that supplies super fine leather and hot-melt adhesive membrane to pass through down between the hot pressing roller.

Further, the temperature difference between the upper hot-pressing roller and the opposite lower hot-pressing roller is 25-35 ℃.

Further, the temperature of the upper hot press roll of the first hot press roll group is 70 ℃, the temperature of the upper hot press roll of the second hot press roll group is 90 ℃, and the temperature of the upper hot press roll of the third hot press roll group is 110 ℃.

Further, the upper hot press rolls of the first hot press roll group are rolled at 3kgf, the upper hot press rolls of the second hot press roll group are rolled at 2.5kgf, and the upper hot press rolls of the third hot press roll group are rolled at 2 kgf.

Further, the cooling device comprises four cooling roller sets which are sequentially arranged at the rear of the pressing device at intervals, the cooling roller sets comprise lower cooling rollers used for supporting the microfiber leather and upper cooling rollers arranged above the lower cooling rollers and used for cold-pressing hot melt adhesive films, and cooling channels for the microfiber leather and the hot melt adhesive films to pass through are formed between the upper cooling rollers and the lower cooling rollers.

Further, the temperature of the first cooling roller group is 70 ℃, the temperature of the second cooling roller group is 45 ℃, the temperature of the third cooling roller group is 20 ℃, and the temperature of the fourth cooling roller group is 10 ℃.

Further, the roll pressure of the upper cooling rolls of the first cooling roll group is 4kgf, the roll pressure of the upper cooling rolls of the second cooling roll group is 5kgf, the roll pressure of the upper cooling rolls of the third cooling roll group is 6kgf, and the roll pressure of the upper cooling rolls of the fourth cooling roll group is 6 kgf.

As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:

firstly, a layer of hot melt adhesive film with release paper is compounded on the surface of microfiber leather to obtain a microfiber leather semi-finished product, and when the microfiber leather semi-finished product is compounded with other fabrics or a base body, the release paper is torn off, so that the microfiber leather semi-finished product can be directly compounded with other fabrics; the specific components and components of the adhesive layer in the hot melt adhesive film are limited, the ethylene-methyl methacrylate copolymer is used as a main raw material, oxidized polyethylene wax and ethylene bis-stearamide are added to be matched with other raw materials, so that the hot-pressing compounding temperature of the hot melt adhesive film is reduced, the flow speed of the molten hot melt adhesive film can be increased, the adhesive solution can efficiently permeate into the microfiber leather, the adhesive force between the hot melt adhesive film and the microfiber leather is increased, the adhesive force between the microfiber leather and a fabric or a substrate can be ensured, and the production requirements are met; adding dimethyltin isooctyl dimercaptoacetate, 2, 6-di-tert-butyl-p-cresol and other raw materials for matching, preventing the hot melt adhesive film from being oxidized and decomposed when being compounded with microfiber leather, other fabrics or a substrate, and ensuring the adhesive force of each layer between the finished products obtained by compounding; oyster shell powder and silica powder are added to be matched with other raw materials, and when glue solution flows, the glue solution permeates into gaps among the microfiber leather or the fabric, so that the adhesive force among all layers of a finished product is improved, the curing speed is accelerated, the shrinkage rate after curing is effectively reduced, and the stability of compounding among all layers is ensured;

secondly, carrying out hot pressing on the hot melt adhesive film and the microfiber leather, and then carrying out cold pressing for cooling to complete compounding to obtain a semi-finished product; the melted glue solution is uniformly spread on the microfiber leather in a sectional pressurizing and heating mode, so that the glue solution can be efficiently permeated; the cold pressing and cooling also adopts a sectional pressurizing mode so as to ensure that the microfiber leather does not rebound, and simultaneously, the microfiber leather is matched with glue solution to accelerate the fixing speed, reduce the curing shrinkage rate of the microfiber leather, ensure the stable lamination of the microfiber leather and the hot melt adhesive film, and facilitate rolling and collecting for later use.

Drawings

FIG. 1 is a schematic flow diagram of the preparation of the present invention;

wherein, 1-hot melt adhesive film, 2-microfiber leather, 3-pressing equipment, 4-cooling equipment, 31-hot pressing roller set, 32-upper hot pressing roller, 33-lower hot pressing roller, 41-cooling roller set, 42-upper cooling roller and 43-lower cooling roller.

Detailed Description

The invention is further described below by means of specific embodiments.

A pre-laminating process of microfiber leather and a hot melt adhesive film comprises the following steps:

firstly, gluing and aligning a glue layer of a hot melt glue film 1 and microfiber leather 2;

heating and ironing one side of the release paper by using a pressing device 3, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather 2;

and step three, cooling the microfiber leather 2 attached with the hot melt adhesive film 1 by a cooling device 4 to complete pre-attachment of the microfiber leather 2 and the hot melt adhesive film 1.

Wherein, hot melt adhesive membrane 1 is including leaving type paper and setting up the glue film on leaving type paper, and the glue film comprises the raw materials of following parts by weight: 70-80 parts of ethylene-methacrylate copolymer, 15-22 parts of maleic anhydride grafted polypropylene, 6-8 parts of oxidized polyethylene wax, 3-5 parts of ethylene distearamide, 2-5 parts of tin isooctyl dimercaptodimethylacetate, 1-3 parts of dodecahydroxystearic acid, 8-15 parts of oyster shell powder, 5-10 parts of silica powder and 3-6 parts of 2, 6-di-tert-butyl-p-cresol.

The pressing equipment 3 comprises three hot-pressing roller sets 31 which are sequentially arranged at intervals, each hot-pressing roller set 31 comprises a lower hot-pressing roller 33 used for supporting the microfiber leather and an upper hot-pressing roller 32 arranged above the lower hot-pressing roller 33 and used for hot-pressing the hot-melt adhesive film 1, and a channel for the microfiber leather 2 and the hot-melt adhesive film 1 to pass through is formed between the upper hot-pressing roller 32 and the lower hot-pressing roller 33; specifically, the temperature difference between the upper hot press roll 32 and the opposite lower hot press roll 33 is 25 to 35 ℃, the temperature of the upper hot press roll of the first hot press roll group is 70 ℃, the temperature of the upper hot press roll of the second hot press roll group is 90 ℃, the temperature of the upper hot press roll of the third hot press roll group is 110 ℃, and further, the roll pressure of the upper hot press roll of the first hot press roll group is 3kgf, the roll pressure of the upper hot press roll of the second hot press roll group is 2.5kgf, and the roll pressure of the upper hot press roll of the third hot press roll group is 2 kgf.

The cooling device 4 comprises four cooling roller sets 41 which are sequentially arranged behind the pressing device 3 at intervals, each cooling roller set 41 comprises a lower cooling roller 43 for supporting the microfiber leather and an upper cooling roller 42 which is arranged above the lower cooling roller 43 and used for cold-pressing the hot melt adhesive film 1, and a cooling channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper cooling roller 42 and the lower cooling roller 43; specifically, the temperature of the first cooling roller group is 70 ℃, the temperature of the second cooling roller group is 45 ℃, the temperature of the third cooling roller group is 20 ℃, and the temperature of the fourth cooling roller group is 10 ℃; further, the roll pressure of the upper cooling rolls of the first cooling roll group was 4kgf, the roll pressure of the upper cooling rolls of the second cooling roll group was 5kgf, the roll pressure of the upper cooling rolls of the third cooling roll group was 6kgf, and the roll pressure of the upper cooling rolls of the fourth cooling roll group was 6 kgf.

The preparation method of the hot melt adhesive film comprises the following steps: firstly, mixing and heating ethylene-methacrylate copolymer, maleic anhydride grafted polypropylene, oyster shell powder, silicon micropowder and ethylene distearamide to 150 ℃, and stirring for 20-30min under heat preservation; step two, adding oxidized polyethylene wax, dimethyl isooctyl dimercaptoacetate tin, dodecahydroxystearic acid and 2, 6-di-tert-butyl-p-cresol into the mixed solution prepared in the step one in sequence, cooling to 110 ℃, and continuing to keep the temperature and stir for 15-20min to prepare a glue solution; step three, performing tape casting on release paper to form a glue layer with the thickness of 0.5mm, and cooling to room temperature to obtain the hot melt glue film.

Example 1

A pre-laminating process of microfiber leather and a hot melt adhesive film comprises the following steps:

firstly, gluing and aligning a glue layer of a hot melt adhesive film with microfiber leather;

heating and ironing one side of the release paper by using pressing equipment, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather;

and step three, cooling the microfiber leather attached with the hot melt adhesive film by cooling equipment to finish pre-attaching the microfiber leather and the hot melt adhesive film.

Wherein, hot melt adhesive membrane is including leaving type paper and setting up the glue film on leaving type paper, and the glue film comprises the raw materials of following parts by weight: 70 parts of ethylene-methacrylate copolymer, 22 parts of maleic anhydride grafted polypropylene, 6 parts of oxidized polyethylene wax, 5 parts of ethylene distearamide, 2 parts of tin isooctyl dimercaptodimethylacetate, 3 parts of dodecahydroxystearic acid, 8 parts of oyster shell powder, 10 parts of silicon micropowder and 3 parts of 2, 6-di-tert-butyl-p-cresol.

The pressing equipment comprises three hot pressing roller sets which are sequentially arranged at intervals, each hot pressing roller set comprises a lower hot pressing roller for supporting the microfiber leather and an upper hot pressing roller arranged above the lower hot pressing roller for hot pressing the hot melt adhesive film, and a channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper hot pressing roller and the lower hot pressing roller; specifically, the temperature difference between the upper hot pressing roll and the lower hot pressing roll is 25 ℃, the temperature of the upper hot pressing roll of the first hot pressing roll group is 70 ℃, the temperature of the upper hot pressing roll of the second hot pressing roll group is 90 ℃, the temperature of the upper hot pressing roll of the third hot pressing roll group is 110 ℃, and further, the rolling pressure of the upper hot pressing roll of the first hot pressing roll group is 3kgf, the rolling pressure of the upper hot pressing roll of the second hot pressing roll group is 2.5kgf, and the rolling pressure of the upper hot pressing roll of the third hot pressing roll group is 2 kgf.

The cooling device comprises four cooling roller sets which are sequentially arranged at the rear part of the pressing device at intervals, each cooling roller set comprises a lower cooling roller for supporting the microfiber leather and an upper cooling roller which is arranged above the lower cooling roller and used for cold-pressing a hot melt adhesive film, and a cooling channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper cooling roller and the lower cooling roller; specifically, the temperature of the first cooling roller group is 70 ℃, the temperature of the second cooling roller group is 45 ℃, the temperature of the third cooling roller group is 20 ℃, and the temperature of the fourth cooling roller group is 10 ℃; further, the roll pressure of the upper cooling rolls of the first cooling roll group was 4kgf, the roll pressure of the upper cooling rolls of the second cooling roll group was 5kgf, the roll pressure of the upper cooling rolls of the third cooling roll group was 6kgf, and the roll pressure of the upper cooling rolls of the fourth cooling roll group was 6 kgf.

Example 2

A pre-laminating process of microfiber leather and a hot melt adhesive film comprises the following steps:

firstly, gluing and aligning a glue layer of a hot melt adhesive film with microfiber leather;

heating and ironing one side of the release paper by using pressing equipment, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather;

and step three, cooling the microfiber leather attached with the hot melt adhesive film by cooling equipment to finish pre-attaching the microfiber leather and the hot melt adhesive film.

Wherein, hot melt adhesive membrane is including leaving type paper and setting up the glue film on leaving type paper, and the glue film comprises the raw materials of following parts by weight: 80 parts of ethylene-methacrylate copolymer, 15 parts of maleic anhydride grafted polypropylene, 8 parts of oxidized polyethylene wax, 3 parts of ethylene distearamide, 5 parts of tin isooctyl dimercaptodimethylacetate, 1 part of dodecahydroxy stearic acid, 15 parts of oyster shell powder, 5 parts of silicon micropowder and 6 parts of 2, 6-di-tert-butyl-p-cresol.

The pressing equipment comprises three hot pressing roller sets which are sequentially arranged at intervals, each hot pressing roller set comprises a lower hot pressing roller for supporting the microfiber leather and an upper hot pressing roller arranged above the lower hot pressing roller for hot pressing the hot melt adhesive film, and a channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper hot pressing roller and the lower hot pressing roller; specifically, the temperature difference between the upper hot pressing roll and the lower hot pressing roll is 35 ℃, the temperature of the upper hot pressing roll of the first hot pressing roll group is 70 ℃, the temperature of the upper hot pressing roll of the second hot pressing roll group is 90 ℃, the temperature of the upper hot pressing roll of the third hot pressing roll group is 110 ℃, and further, the rolling pressure of the upper hot pressing roll of the first hot pressing roll group is 3kgf, the rolling pressure of the upper hot pressing roll of the second hot pressing roll group is 2.5kgf, and the rolling pressure of the upper hot pressing roll of the third hot pressing roll group is 2 kgf.

The cooling device comprises four cooling roller sets which are sequentially arranged at the rear part of the pressing device at intervals, each cooling roller set comprises a lower cooling roller for supporting the microfiber leather and an upper cooling roller which is arranged above the lower cooling roller and used for cold-pressing a hot melt adhesive film, and a cooling channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper cooling roller and the lower cooling roller; specifically, the temperature of the first cooling roller group is 70 ℃, the temperature of the second cooling roller group is 45 ℃, the temperature of the third cooling roller group is 20 ℃, and the temperature of the fourth cooling roller group is 10 ℃; further, the roll pressure of the upper cooling rolls of the first cooling roll group was 4kgf, the roll pressure of the upper cooling rolls of the second cooling roll group was 5kgf, the roll pressure of the upper cooling rolls of the third cooling roll group was 6kgf, and the roll pressure of the upper cooling rolls of the fourth cooling roll group was 6 kgf.

Example 3

A pre-laminating process of microfiber leather and a hot melt adhesive film comprises the following steps:

firstly, gluing and aligning a glue layer of a hot melt adhesive film with microfiber leather;

heating and ironing one side of the release paper by using pressing equipment, and transferring the temperature to the adhesive layer to enable the hot melt adhesive to be adhered to the microfiber leather;

and step three, cooling the microfiber leather attached with the hot melt adhesive film by cooling equipment to finish pre-attaching the microfiber leather and the hot melt adhesive film.

Wherein, hot melt adhesive membrane is including leaving type paper and setting up the glue film on leaving type paper, and the glue film comprises the raw materials of following parts by weight: 75 parts of ethylene-methacrylate copolymer, 18 parts of maleic anhydride grafted polypropylene, 7 parts of oxidized polyethylene wax, 4 parts of ethylene distearamide, 3 parts of tin isooctyl dimercaptodimethylacetate, 2 parts of dodecahydroxystearic acid, 12 parts of oyster shell powder, 7 parts of silicon micropowder and 5 parts of 2, 6-di-tert-butyl-p-cresol.

The pressing equipment comprises three hot pressing roller sets which are sequentially arranged at intervals, each hot pressing roller set comprises a lower hot pressing roller for supporting the microfiber leather and an upper hot pressing roller arranged above the lower hot pressing roller for hot pressing the hot melt adhesive film, and a channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper hot pressing roller and the lower hot pressing roller; specifically, the temperature difference between the upper hot pressing roll and the lower hot pressing roll is 30 ℃, the temperature of the upper hot pressing roll of the first hot pressing roll group is 70 ℃, the temperature of the upper hot pressing roll of the second hot pressing roll group is 90 ℃, the temperature of the upper hot pressing roll of the third hot pressing roll group is 110 ℃, and further, the rolling pressure of the upper hot pressing roll of the first hot pressing roll group is 3kgf, the rolling pressure of the upper hot pressing roll of the second hot pressing roll group is 2.5kgf, and the rolling pressure of the upper hot pressing roll of the third hot pressing roll group is 2 kgf.

The cooling device comprises four cooling roller sets which are sequentially arranged at the rear part of the pressing device at intervals, each cooling roller set comprises a lower cooling roller for supporting the microfiber leather and an upper cooling roller which is arranged above the lower cooling roller and used for cold-pressing a hot melt adhesive film, and a cooling channel for the microfiber leather and the hot melt adhesive film to pass through is formed between the upper cooling roller and the lower cooling roller; specifically, the temperature of the first cooling roller group is 70 ℃, the temperature of the second cooling roller group is 45 ℃, the temperature of the third cooling roller group is 20 ℃, and the temperature of the fourth cooling roller group is 10 ℃; further, the roll pressure of the upper cooling rolls of the first cooling roll group was 4kgf, the roll pressure of the upper cooling rolls of the second cooling roll group was 5kgf, the roll pressure of the upper cooling rolls of the third cooling roll group was 6kgf, and the roll pressure of the upper cooling rolls of the fourth cooling roll group was 6 kgf.

The microfiber leather with the hot melt adhesive film obtained by compounding the three embodiments and the microfiber leather directly compounded with other fabrics by a binder in the prior art are subjected to peel strength test to obtain the following data, which are specifically shown in table 1:

TABLE 1 test parameter data sheet for each example

Item	Example 1	Example 2	Example 3	Comparative example
					Peel strength	88N/25mm	90N/25mm	93N/25mm	52N/25mm

According to the table, the surface of the microfiber leather is compounded with a layer of hot melt adhesive film with the release paper to obtain a microfiber leather semi-finished product, and when the microfiber leather semi-finished product is compounded with other fabrics or substrates, the release paper is torn off, so that the microfiber leather semi-finished product can be directly compounded with other fabrics; the hot melt adhesive film and the microfiber leather are subjected to hot pressing and then cold pressing for cooling to complete compounding to obtain a semi-finished product; the melted glue solution is uniformly spread on the microfiber leather in a sectional pressurizing and heating mode, so that the glue solution can be efficiently permeated; the cold pressing and cooling also adopts a sectional pressurizing mode so as to ensure that the microfiber leather does not rebound, and simultaneously, the microfiber leather is matched with glue solution to accelerate the fixing speed, reduce the curing shrinkage rate of the microfiber leather, ensure the stable lamination of the microfiber leather and the hot melt adhesive film, and facilitate rolling and collecting for later use.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.