CN106905866B - Preparation process of hot melt adhesive film - Google Patents
Preparation process of hot melt adhesive film Download PDFInfo
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- CN106905866B CN106905866B CN201710239441.0A CN201710239441A CN106905866B CN 106905866 B CN106905866 B CN 106905866B CN 201710239441 A CN201710239441 A CN 201710239441A CN 106905866 B CN106905866 B CN 106905866B
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- hot melt
- melt adhesive
- adhesive film
- film
- tensile strength
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J177/00—Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Adhesives based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2477/00—Presence of polyamide
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a preparation process of a hot melt adhesive film, in particular to a preparation process of an air-permeable hot melt adhesive film prepared by a blow molding method. The air-permeable hot melt adhesive film is formed by selecting two partially compatible hot melt adhesive raw materials with different tensile strengths according to a preset proportion, uniformly mixing the two hot melt adhesive raw materials, performing melt extrusion blow molding through a film blowing machine to form a double-layer adhesive film, cutting edges of the double-layer adhesive film to form a single-layer adhesive film, stretching the single-layer adhesive film by a biaxial stretching machine, forming holes, and rolling. Meanwhile, a certain amount of pore-forming agent is added, so that the micropores on the breathable hot melt adhesive film are distributed more uniformly. The preparation process provided by the invention has the advantages of strong universality, simple process, online pore-forming, contribution to continuous production, relatively low energy consumption and production cost and good working environment. The air-permeable hot melt adhesive film prepared by the invention is more suitable for being applied in the field with relatively high requirements on bonding strength and air permeability.
Description
Technical Field
The invention relates to a preparation process of a hot melt adhesive film, in particular to a preparation process of an air-permeable hot melt adhesive film prepared by a blow molding method.
Background
The hot melt adhesive film is formed by preparing a hot melt adhesive into a film with a certain thickness, placing the film between adherends and bonding the films by heating and pressurizing, thereby helping industrial production to realize modularization, improving production efficiency and saving sizing materials.
The hot melt adhesive is made into a film by considering the rheological property, the film forming property and other properties of raw materials. There are various film forming methods such as coating, blow molding, casting, and calendering. Among them, the blow molding method is favored by manufacturers of hot melt adhesive materials because the cost is relatively low due to the overall equipment and environmental requirements, and the performance index after film formation basically meets the application requirements.
However, regardless of the method by which the hot melt adhesive film is formed, it is always inferior to the hot melt adhesive web in air permeability due to its own characteristics. The hot melt adhesive net film is a non-woven fabric-shaped hot melt adhesive product which is widely accepted by customers as a main breathable adhesive material, but has high requirements on equipment, temperature environment and the like in the production and preparation process, high energy consumption and relatively poor working environment.
Therefore, how to prepare the air-permeable hot-melt adhesive film, and the preparation process and the cost are relatively low, and the adhesive needs can be met, which becomes a problem to be solved.
Disclosure of Invention
The present invention is directed to solve the above problems and to provide a process for preparing a hot-melt adhesive film, so that the prepared hot-melt adhesive film has air permeability.
The technical scheme adopted by the invention is as follows: a preparation process of a hot melt adhesive film comprises the following steps:
(1) selecting two hot melt adhesive raw materials according to a preset proportion, wherein the two hot melt adhesive raw materials are partially compatible and have different tensile strengths;
(2) putting the two uniformly mixed hot melt adhesive raw materials into a film blowing machine, performing melt extrusion blow molding through the film blowing machine to form a film bubble, and then extruding gas in the film bubble to form a double-layer adhesive film;
(3) cutting edges of the double-layer adhesive film and splitting the double-layer adhesive film to form a single-layer adhesive film;
(4) and (3) stretching the single-layer adhesive film by using a biaxial stretching machine and then rolling to form the air-permeable hot-melt adhesive film.
In the step (1), the two types of hot melt adhesive raw materials are preferably colloidal particles; the index value of the tensile strength of the hot melt adhesive raw materials with lower tensile strength is taken as a reference, and the difference ratio of the index values of the tensile strength of the two hot melt adhesive raw materials is more than or equal to 40 percent; the consumption of the hot melt adhesive raw material with higher tensile strength is less than or equal to that of the hot melt adhesive raw material with lower tensile strength, and the mass ratio of the two is preferably 1: 1-1: 10;
in the step (1), a pore-foaming agent can be added simultaneously, wherein the pore-foaming agent is inorganic small particles such as calcium carbonate or talcum powder, and the addition amount of the pore-foaming agent is 0.1-1% of the total amount of the hot melt adhesive raw material;
in the step (4), the biaxial stretching proportion of the biaxial stretching machine is consistent or inconsistent, and the area size ratio of the biaxial stretching machine before stretching to the biaxial stretching machine after stretching is 1: 1.2-1: 1.8;
in the step (4), the thickness of the air-permeable hot-melt adhesive film is 0.02-0.2 mm.
The invention has the beneficial effects that: the air-permeable hot melt adhesive film is formed by selecting two partially compatible hot melt adhesive raw materials with different tensile strengths according to a preset proportion, uniformly mixing the two hot melt adhesive raw materials, performing melt extrusion blow molding through a film blowing machine to form a double-layer adhesive film, cutting edges of the double-layer adhesive film to form a single-layer adhesive film, stretching the single-layer adhesive film by a biaxial stretching machine, forming holes, and rolling. Meanwhile, a certain amount of pore-forming agent is added, so that the micropores on the breathable hot melt adhesive film are distributed more uniformly. The preparation process provided by the invention has the advantages of strong universality, simple process, online pore-forming, contribution to continuous production, relatively low energy consumption and production cost and good working environment. The air-permeable hot melt adhesive film prepared by the invention is more suitable for being applied in the field with relatively high requirements on bonding strength and air permeability.
Detailed Description
The invention selects two hot melt adhesives as raw materials according to a preset proportion, and the two hot melt adhesives are partially compatible and have different tensile strengths; uniformly mixing two hot melt adhesive raw materials, putting the mixture into a film blowing machine, performing melt extrusion blow molding through the film blowing machine to form a film bubble, and then extruding gas in the film bubble to form a double-layer adhesive film; cutting edges of the double-layer adhesive film and splitting the double-layer adhesive film to form a single-layer adhesive film; and (3) stretching the single-layer adhesive film by using a biaxial stretching machine and then rolling the single-layer adhesive film to form the air-permeable hot-melt adhesive film.
The two types of the hot melt adhesive raw materials are preferably colloidal particles; the using amount of the hot melt adhesive particles with higher tensile strength is less than or equal to that of the hot melt adhesive particles with lower tensile strength, and the density and size of the final micropores can be adjusted by adjusting the using amount proportion of the two hot melt adhesive raw materials within a certain range.
The index value of the tensile strength of the hot melt adhesive particles with lower tensile strength is taken as a reference, and the difference ratio of the index values of the tensile strength of the two hot melt adhesive particles is more than or equal to 40 percent, so that micropores which are relatively uniformly distributed are formed on the adhesive film in the biaxial stretching stage.
The mass ratio of the using amount of the hot melt adhesive particles with high tensile strength to the using amount of the hot melt adhesive particles with low tensile strength is preferably 1: 1-1: 10, so that the comprehensive indexes of the air permeability and the local bonding effect of the final adhesive film product are balanced.
In the biaxial stretching stage, the biaxial stretching proportion is consistent or inconsistent, the area size ratio of the film before stretching to the film after stretching is 1: 1.2-1: 1.8, and the local bonding effect or the whole air permeability of the film can be influenced if the area size ratio is too large or too small.
The thickness of the finally prepared adhesive film product is preferably 0.02-0.2 mm.
Meanwhile, in the stage of colloidal particle selection and mixing, a proper pore-forming agent is added, such as inorganic small particles of specific amount of calcium carbonate or talcum powder and the like, so that the distribution of micropores on the final adhesive film product is more uniform, the addition amount of the pore-forming agent is preferably 0.1-1% of the total amount of the hot melt adhesive colloidal particles, and the air permeability or local adhesive effect of the final adhesive film product can be influenced if the addition amount is too small or too much.
For further describing the invention, the inventor selects PES hot melt adhesive particles of the brand 126 and PA hot melt adhesive particles of the brand 6150 (the tensile strength of PES of the brand 126 is lower, and the difference ratio of the index values of the tensile strength of the PES and the tensile strength of the PA hot melt adhesive particles of the brand 6150, which are produced by Shanghai Tianyang Hot melt adhesive materials Co., Ltd.) to be mixed in proportion or to be mixed with pore-forming agent in proportion, and refers to the technical scheme of the invention to prepare the air permeability hot melt adhesive film sample marked as Pi. The specific raw material ratios and the parameters of the stretch ratio are shown in the following table 1:
| sample (I) | The mass parts of all the raw materials | Draw ratio |
| P1 | PES:PA =30:30 | 1.2 |
| P2 | PES PA calcium carbonate =70:30:0.1 | 1.4 |
| P3 | PES PA talc powder =150:30:0.9 | 1.6 |
| P4 | PES PA porogen =300:30:3.3 | 1.8 |
Table 1: the raw material ratios and the draw ratios of the samples were determined.
Each sample P1-P4, with blown film and web products of 126 and 6150, were tested against the relevant standards and the results are shown in table 2 below:
table 2: the raw material ratios and the draw ratios of the samples were determined.
From the above table 2, it is obvious that the peel strength of the hot melt adhesive film of the same grade is obviously higher than that of the net film product, but the adhesive film product has no excellent air permeability compared with the net film. By adopting the technical scheme of the invention, two partially compatible hot melt adhesive raw materials with different tensile strengths are selected, or a specific amount of inorganic small particle pore-forming agent such as calcium carbonate or talcum powder is combined, and the breathable hot melt adhesive film can be formed by utilizing a film blowing technology and performing biaxial stretching. Although the adhesive strength of the hot melt adhesive film is not as good as that of the conventional adhesive film, the hot melt adhesive film is superior to the conventional net film, and is superior to the conventional adhesive film in the aspect of air permeability, namely the comprehensive indexes of air permeability and adhesive effect of the hot melt adhesive film are more suitable for the actual requirements of specific markets (such as the fields with relatively high requirements on adhesive strength and air permeability). The preparation process provided by the invention has the advantages of strong universality, simple process, online pore-forming, contribution to continuous production, relatively low energy consumption and production cost and good working environment.
Claims (4)
1. The preparation process of the hot melt adhesive film is characterized by comprising the following steps:
(1) selecting two hot melt adhesive raw materials according to a preset proportion, wherein the two hot melt adhesive raw materials are partially compatible and have different tensile strengths;
(2) putting the two uniformly mixed hot melt adhesive raw materials into a film blowing machine, performing melt extrusion blow molding through the film blowing machine to form a film bubble, and then extruding gas in the film bubble to form a double-layer adhesive film;
(3) cutting edges of the double-layer adhesive film and splitting the double-layer adhesive film to form a single-layer adhesive film;
(4) stretching the single-layer adhesive film by using a biaxial stretching machine and then rolling to form a breathable hot-melt adhesive film;
in the step (1), the consumption of the hot melt adhesive raw material with higher tensile strength is less than or equal to that of the hot melt adhesive raw material with lower tensile strength; the mass ratio of the hot melt adhesive raw material with higher tensile strength to the hot melt adhesive raw material with lower tensile strength is 1: 1-1: 10; the index value of the tensile strength of the hot melt adhesive raw materials with lower tensile strength is taken as a reference, and the difference ratio of the index values of the tensile strength of the two hot melt adhesive raw materials is more than or equal to 40 percent.
2. The process for preparing a hot melt adhesive film according to claim 1, wherein: in the step (4), the area size ratio of the pre-stretching area to the post-stretching area is 1: 1.2-1: 1.8.
3. The process for preparing a hot melt adhesive film according to claim 1, wherein: in the step (1), a pore-foaming agent is also added at the same time, and the pore-foaming agent is calcium carbonate or talcum powder inorganic small particles.
4. The process for preparing a hot melt adhesive film according to claim 3, wherein: the adding amount of the pore-foaming agent in the step (1) is 0.1-1% of the total amount of the hot melt adhesive raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710239441.0A CN106905866B (en) | 2017-04-13 | 2017-04-13 | Preparation process of hot melt adhesive film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710239441.0A CN106905866B (en) | 2017-04-13 | 2017-04-13 | Preparation process of hot melt adhesive film |
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| Publication Number | Publication Date |
|---|---|
| CN106905866A CN106905866A (en) | 2017-06-30 |
| CN106905866B true CN106905866B (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710239441.0A Active CN106905866B (en) | 2017-04-13 | 2017-04-13 | Preparation process of hot melt adhesive film |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1748981A (en) * | 2005-10-09 | 2006-03-22 | 华东理工大学 | Low temperature solid phase processing method of polymer alloy |
| CN103739962A (en) * | 2014-01-02 | 2014-04-23 | 上海紫华企业有限公司 | Polyolefin microporous air-permeable membrane and preparation method thereof |
| CN104552997A (en) * | 2014-11-27 | 2015-04-29 | 佛山市联塑万嘉新卫材有限公司 | Plastic blown film compounding and manufacturing method |
| CN106317576A (en) * | 2016-08-30 | 2017-01-11 | 重庆和泰塑胶股份有限公司 | Method for preparing breathable film through film blowing |
| CN106541567A (en) * | 2016-10-18 | 2017-03-29 | 上海天洋热熔粘接材料股份有限公司 | The preparation technology of PUR blown film and the inflation film manufacturing machine for preparing the PUR blown film |
-
2017
- 2017-04-13 CN CN201710239441.0A patent/CN106905866B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1748981A (en) * | 2005-10-09 | 2006-03-22 | 华东理工大学 | Low temperature solid phase processing method of polymer alloy |
| CN103739962A (en) * | 2014-01-02 | 2014-04-23 | 上海紫华企业有限公司 | Polyolefin microporous air-permeable membrane and preparation method thereof |
| CN104552997A (en) * | 2014-11-27 | 2015-04-29 | 佛山市联塑万嘉新卫材有限公司 | Plastic blown film compounding and manufacturing method |
| CN106317576A (en) * | 2016-08-30 | 2017-01-11 | 重庆和泰塑胶股份有限公司 | Method for preparing breathable film through film blowing |
| CN106541567A (en) * | 2016-10-18 | 2017-03-29 | 上海天洋热熔粘接材料股份有限公司 | The preparation technology of PUR blown film and the inflation film manufacturing machine for preparing the PUR blown film |
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| CN106905866A (en) | 2017-06-30 |
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Address after: 201802 Shanghai City, Jiading District Hui Ping Lu Nanxiang Town, No. 505 Patentee after: SHANGHAI TIANYANG HOT MELT ADHESIVE Co.,Ltd. Patentee after: NANTONG TIANYANG NEW MATERIAL CO.,LTD. Patentee after: Kunshan Tianyang New Material Co.,Ltd. Address before: 201802 Shanghai City, Jiading District Hui Ping Lu Nanxiang Town, No. 505 Patentee before: SHANGHAI TIANYANG HOT MELT ADHESIVE Co.,Ltd. Patentee before: NANTONG TIANYANG NEW MATERIAL CO.,LTD. Patentee before: KUNSHAN TIANYANG HOT MELT ADHESIVE Co.,Ltd. |
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Address after: 201802 Shanghai City, Jiading District Hui Ping Lu Nanxiang Town, No. 505 Patentee after: Tianyang New Material (Shanghai) Technology Co.,Ltd. Patentee after: NANTONG TIANYANG NEW MATERIAL CO.,LTD. Patentee after: Kunshan Tianyang New Material Co.,Ltd. Address before: 201802 Shanghai City, Jiading District Hui Ping Lu Nanxiang Town, No. 505 Patentee before: SHANGHAI TIANYANG HOT MELT ADHESIVE Co.,Ltd. Patentee before: NANTONG TIANYANG NEW MATERIAL CO.,LTD. Patentee before: Kunshan Tianyang New Material Co.,Ltd. |
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