CN112608591A - Preparation method of TPU (thermoplastic polyurethane) material protective film - Google Patents
Preparation method of TPU (thermoplastic polyurethane) material protective film Download PDFInfo
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- CN112608591A CN112608591A CN202011334387.6A CN202011334387A CN112608591A CN 112608591 A CN112608591 A CN 112608591A CN 202011334387 A CN202011334387 A CN 202011334387A CN 112608591 A CN112608591 A CN 112608591A
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- tpu
- screw
- protective film
- film
- screw extruder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a preparation method of a TPU material protective film, which comprises the following steps of S1: crushing polyester type TPU particles to prepare liquid A; s2: crushing polytetrafluoroethylene, crushing TPU particles, mixing the two materials, and then melting and mixing to prepare liquid B; s3: putting the liquid A and the liquid B into a mixer in proportion to obtain a mixed material A; s4: then sending the mixed material A to a dehumidifying dryer for drying; s5: extruding the mixed material A into a film; s6: the finished film in the step S5 is drawn by a drawing device, constant tension of drawing is realized by adopting a tension closed-loop control mode, and the stability of tension is ensured; s7: and winding is carried out through a winding device. The invention provides a novel method for manufacturing a TPU material aiming at the condition that the TPU material covers the inside of a paper box to be used as a material for protecting an inner film, and the TPU film which is dry, stable in cutting and stable in mechanical property is generated by controlling a production material, a film extruder and a traction device, so that the use effect is good.
Description
Technical Field
The invention relates to the technical field of material films, in particular to a preparation method of a TPU material protective film.
Background
The buffer package has become one of indispensable components in the consumption and circulation links of commodities. The high-quality packaging material can improve the safety of the commodities and reduce the loss of the commodities in the circulation process of the commodities. If the packaging mode of expensive electronic products such as tablet computers is improper, damage can be caused to the products in the logistics process, and it is very important for the electronic products to select a packaging material suitable for electronic product transportation. The prior packaging materials are mostly seen in plastic foam, pearl wool, waste newspaper, buffering inflatable bags and the like. The plastic foam and the pearl wool are packaging materials which are used by electronic merchants most in logistics transportation of electronic products in the past, but the materials gradually fade the vision of people with the increasing environmental awareness of consumers.
Neotype reinforcing plastic elastomer protection film (TPU), through the section laminating in the carton inner face, put electronic product between protection film face and carton during the use, then will fold the carton shaping, form the box of square to carry out effectual protection. The reinforced plastic elastomer protective film (TPU) has the excellent characteristics of high tension, high tensile force, toughness and aging resistance, and is a mature fashionable environment-friendly material.
TPU, a short term for Thermoplastic polyurethane elastomers (Thermoplastic polyurethanes), is also known as PU thermoplastics. Is a linear block copolymer consisting of an oligomeric polyol soft segment and a diisocyanate-chain extender hard segment. The TPU film is prepared by special processes such as calendering, tape casting, film blowing, coating and the like on the basis of TPU granules, and is an important application form of TPU materials. The TPU film produced by extruding and casting the TPU granules has the characteristics of high moisture permeability, air permeability, cold resistance, heat resistance, wear resistance, high tension and high load supporting force. Thereby extending its application to the field of plastics. In particular, TPU has become one of the fastest growing polymeric materials in recent decades. The TPU composition is detected by SGS ASTM F963, does not contain cadmium, lead, mercury, arsenic, chromium and barium, and meets the standard of environmental protection. With the alternative development of industrial technologies, the trend of adopting TPU films to replace non-environment-friendly films has been a trend of pushing environmental protection policies all over the world. The TPU film is a novel industrial material capable of being continuously modified, the performance can be further optimized through the modes of raw material modification, material formula adjustment, production process optimization and the like, the application field is enlarged, and strong and continuous vitality can be endowed to the TPU film. The reinforced plastic elastomer protective film (TPU) is processed by adopting an extrusion casting method.
The use of TPU films as protective materials on the interior walls of cartons has some essential TPU film property requirements: one is that the TPU resin has a strong moisture absorption property, and its granular material may cause processing problems if it contains excessive moisture and reduce the quality of the finished product; one is that the TPU melt is sensitive to both shear and temperature, too high shear can cause product performance reduction, and too high temperature can cause melt decomposition, thus certain requirements are designed on an extruder and a screw; the TPU film has good tensile elasticity, and the tensile stability is kept and the traction force is reduced as much as possible during the traction process.
Disclosure of Invention
In view of the above problems. The invention provides a preparation method of a TPU material protective film.
The technical scheme of the invention is as follows: a preparation method of a TPU material protective film comprises the following steps:
s1: crushing polyester type TPU particles, mixing with oleamide, and melting and mixing by a double-screw extruder to prepare liquid A;
s2: crushing polytetrafluoroethylene, crushing TPU particles, putting the two materials into a horizontal mixer, uniformly mixing, and then carrying out melt mixing through a double-screw extruder to prepare a liquid B;
s3: putting the liquid A and the liquid B into a mixer in proportion, and then sending the mixture into a hot air dryer for drying at the drying temperature of 98 ℃ to obtain a mixed material A;
s4: then sending the mixed material A into a dehumidifying dryer for drying for 3 hours, wherein the drying temperature is 108 ℃, the moisture content of the mixed material A is 0.005-0.03%, and then placing the mixed material A into a dry and sealed container;
s5: and (2) extruding the dried mixed material A obtained in the step (S4) into a film through a single-screw extruder, wherein the linear speed of the screw of the single-screw extruder in rotation is not more than 0.15m/S, the single-screw extruder adopts a barrier type forced feeding screw, a smooth cylinder is matched, and the compression ratio is 1: 2.5, 25-30L/D ratio, the radial clearance between the screw and the column barrel should be 0.1-0.2 mm;
s6: the finished film in the step S5 is drawn by a drawing device, constant tension of drawing is realized by adopting a tension closed-loop control mode, and the stability of tension is ensured;
s7: the winding device is used for winding, and winding is carried out in a clearance winding mode.
Further, in step S5, a variable speed screw driving device is used as the screw of the single screw machine.
Further, in the step S1, the melting temperature of the twin-screw extruder was 310 ℃.
Further, in the step S2, the melting temperature of the twin-screw extruder was 185 ℃.
Further, in the step S2, the melting temperature of the twin-screw extruder was 185 ℃.
Further, the moisture content of the mixed material a in the step S4 is 0.005% to 0.019%.
Further, the three-section screw has a continuous and constant pitch of 1D.
Has the advantages that: the invention provides a novel concept, reasonable design and convenient use, and provides a novel manufacturing method of a TPU material aiming at the condition that the TPU material covers the inside of a paper box to be used as a material for protecting an inner film.
Detailed Description
The invention is further illustrated by the following examples:
a preparation method of a TPU material protective film comprises the following steps:
s1: crushing polyester type TPU particles, mixing with oleamide, and melting and mixing by a double-screw extruder to prepare liquid A;
s2: crushing polytetrafluoroethylene, crushing TPU particles, putting the two materials into a horizontal mixer, uniformly mixing, and then carrying out melt mixing through a double-screw extruder to prepare a liquid B;
s3: putting the liquid A and the liquid B into a mixer in proportion, and then sending the mixture into a hot air dryer for drying at the drying temperature of 98 ℃ to obtain a mixed material A;
s4: then sending the mixed material A into a dehumidifying dryer for drying for 3 hours, wherein the drying temperature is 108 ℃, the moisture content of the mixed material A is 0.005-0.03%, and then placing the mixed material A into a dry and sealed container;
s5: and (2) extruding the dried mixed material A obtained in the step (S4) into a film through a single-screw extruder, wherein the linear speed of the screw of the single-screw extruder in rotation is not more than 0.15m/S, the single-screw extruder adopts a barrier type forced feeding screw, a smooth cylinder is matched, and the compression ratio is 1: 2.5, 25-30L/D ratio, the radial clearance between the screw and the column barrel should be 0.1-0.2 mm;
s6: the finished film in the step S5 is drawn by a drawing device, constant tension of drawing is realized by adopting a tension closed-loop control mode, and the stability of tension is ensured;
s7: the winding device is used for winding, and winding is carried out in a clearance winding mode.
Preferably, in step S5, a variable speed screw driving device is used for the screw on the single screw machine.
Preferably, in the step S1, the melting temperature of the twin-screw extruder is 310 ℃.
Preferably, the melting temperature of the twin-screw extruder in the step of S2 is 185 ℃.
Preferably, the melting temperature of the twin-screw extruder in the step of S2 is 185 ℃.
Preferably, the moisture content of the mixed material a in the step S4 is 0.005% to 0.019%.
Preferably, the three-stage screw has a continuous and constant pitch of 1D.
In the specific implementation process, in the step of S1, the polyester type TPU particles with the weight average molecular weight of (22-28) multiplied by 100 are adopted, crushed to a 95-mesh sieve, mixed in a double-screw extruder for 20min and then prepared into the liquid A. Similarly, in step S2, polytetrafluoroethylene having a number average molecular weight of less than 55 ten thousand is used, and then pulverized to pass through a 150 mesh sieve, and TPU particles having a weight average molecular weight of (5-10). times.105 are used to pulverize to pass through a 150 mesh sieve. Step S2 is heavy, and the two materials are mixed again in a horizontal mixer for 20 min. In step S3, the liquid A and the liquid B are mixed in the mixer for 25min, and dried in the hot air dryer for 3-6 h.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. A preparation method of a TPU material protective film is characterized by comprising the following steps:
s1: crushing polyester type TPU particles, mixing with oleamide, and melting and mixing by a double-screw extruder to prepare liquid A;
s2: crushing polytetrafluoroethylene, crushing TPU particles, putting the two materials into a horizontal mixer, uniformly mixing, and then carrying out melt mixing through a double-screw extruder to prepare a liquid B;
s3: putting the liquid A and the liquid B into a mixer in proportion, and then sending the mixture into a hot air dryer for drying at the drying temperature of 98 ℃ to obtain a mixed material A;
s4: then sending the mixed material A into a dehumidifying dryer for drying for 3 hours, wherein the drying temperature is 108 ℃, the moisture content of the mixed material A is 0.005-0.03%, and then placing the mixed material A into a dry and sealed container;
s5: and (2) extruding the dried mixed material A obtained in the step (S4) into a film through a single-screw extruder, wherein the linear speed of the screw of the single-screw extruder in rotation is not more than 0.15m/S, the single-screw extruder adopts a barrier type forced feeding screw, a smooth cylinder is matched, and the compression ratio is 1: 2.5, 25-30L/D ratio, the radial clearance between the screw and the column barrel should be 0.1-0.2 mm;
s6: the finished film in the step S5 is drawn by a drawing device, constant tension of drawing is realized by adopting a tension closed-loop control mode, and the stability of tension is ensured;
s7: the winding device is used for winding, and winding is carried out in a clearance winding mode.
2. The method for preparing a protective film of TPU material as claimed in claim 1, wherein: in step S5, a variable speed screw driving device is used as the screw of the single screw machine.
3. The method for preparing a protective film of TPU material as claimed in claim 1, wherein: in the step S1, the melting temperature of the twin-screw extruder was 310 ℃.
4. The method for preparing a protective film of TPU material as claimed in claim 1, wherein: in the step S2, the melting temperature of the twin-screw extruder was 185 ℃.
5. The method for preparing a protective film of TPU material as claimed in claim 1, wherein: in the step S2, the melting temperature of the twin-screw extruder was 185 ℃.
6. The method for preparing a protective film of TPU material as claimed in claim 1, wherein: in the step S4, the water content of the mixed material A is 0.005-0.019%.
7. The method for preparing the TPU material protective film according to claim 6, wherein: the three-section screw has a continuous and constant pitch of 1D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011334387.6A CN112608591A (en) | 2020-11-25 | 2020-11-25 | Preparation method of TPU (thermoplastic polyurethane) material protective film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011334387.6A CN112608591A (en) | 2020-11-25 | 2020-11-25 | Preparation method of TPU (thermoplastic polyurethane) material protective film |
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| Publication Number | Publication Date |
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| CN112608591A true CN112608591A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011334387.6A Pending CN112608591A (en) | 2020-11-25 | 2020-11-25 | Preparation method of TPU (thermoplastic polyurethane) material protective film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113799420A (en) * | 2021-09-17 | 2021-12-17 | 浙江驭能新材料科技有限公司 | Composite film forming equipment for producing environment-friendly TPU (thermoplastic polyurethane) car cover film and using method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101422961A (en) * | 2008-11-10 | 2009-05-06 | 大连橡胶塑料机械股份有限公司 | Tension control system of plastic packaging film production line |
| CN111572074A (en) * | 2020-05-21 | 2020-08-25 | 常熟宏巨新材料科技有限公司 | Preparation method of TPU thermoplastic polyurethane film |
-
2020
- 2020-11-25 CN CN202011334387.6A patent/CN112608591A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101422961A (en) * | 2008-11-10 | 2009-05-06 | 大连橡胶塑料机械股份有限公司 | Tension control system of plastic packaging film production line |
| CN111572074A (en) * | 2020-05-21 | 2020-08-25 | 常熟宏巨新材料科技有限公司 | Preparation method of TPU thermoplastic polyurethane film |
Non-Patent Citations (1)
| Title |
|---|
| 温变英主编: "《高分子材料加工（第二版）》", 30 June 2016, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113799420A (en) * | 2021-09-17 | 2021-12-17 | 浙江驭能新材料科技有限公司 | Composite film forming equipment for producing environment-friendly TPU (thermoplastic polyurethane) car cover film and using method thereof |
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Application publication date: 20210406 |