CN105885394A - TPU (thermoplastic polyurethanes) film and preparation method thereof - Google Patents
TPU (thermoplastic polyurethanes) film and preparation method thereof Download PDFInfo
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- CN105885394A CN105885394A CN201610431470.2A CN201610431470A CN105885394A CN 105885394 A CN105885394 A CN 105885394A CN 201610431470 A CN201610431470 A CN 201610431470A CN 105885394 A CN105885394 A CN 105885394A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
-
- 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
- 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
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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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention provides a TPU (thermoplastic polyurethanes) film and a preparation method thereof. The TPU film is prepared from TPU resin, PHA (polyhydroxyalkanoate) resin, a hydrolysis-resistant agent, a light stabilizer and an antioxidant by a calendering technology. The TPU film used for producing automobile seat cushions instead of cattlehide has the advantages of good breathability, high resistance to tear, uniformity in thickness, fewer fisheyes and the like. The preparation method is beneficial to large-scale production and reduction of TPU film cost.
Description
Technical field
The invention belongs to thermoplastic elastomer thin film technical field, more particularly, to a kind of TPU film and preparation side thereof
Method.
Background technology
Automobile cushion is the vitals of automotive trim, enjoys the concern of people because it is directly connected to the comfortableness of automobile.
Medicated cushion material currently mainly is Corii Bovis seu Bubali, PVC leather, PU leather, wherein soft with Corii Bovis seu Bubali, ventilative, comfortableness is good, be subject to most
Welcome.But it is owing to Corii Bovis seu Bubali is expensive, wear-resisting, scraping and wiping resistance performance is not enough, causes service life shorter.
TPU is a kind of Polyurethane Thermoplastic Elastomer, and TPU is the abbreviation of thermoplastic polyurethane macromolecular material, by polyethers
Or polyester diol, diisocyanate and small-molecular-weight chain extender form through addition polymerization.There is high-modulus, high intensity, height
The characteristics such as elongation, high resiliency and excellent wear-resisting, low temperature resistant, tasteless, nontoxic, heat sealable processing, and have plastics concurrently
Processability and the physical and mechanical properties of rubber, lead in auto industry, Aero-Space, health care, the articles for daily use etc.
Territory is widely used.
Owing to the flexibility of TPU film is closest to head layer Corii Bovis seu Bubali, and there is wear-resisting, scratch resistance, be therefore that instead of Corii Bovis seu Bubali
Make the preferred material of superior automobile medicated cushion.Generally the preparation method of TPU film have blowing, be cast, the technique such as calendering,
But the TPU film thickness range using blow molding process to prepare is many compared with point little, brilliant, use the TPU film that curtain coating duty is standby
Tear-resistant poor performance, two kinds of techniques are not the most well positioned to meet automobile cushion and use requirement.Calendering technology is current plastic sheeting
In technique, yield is maximum, fastest, automatization and the production technology of change variety, and use prepared by this technique is thin
The advantages such as it is uniform that film has thickness, and embossed channels is clear, thin film tear resistance is good.
Public announcement of a patent application number for the patent of invention of " CN 103289360A " disclose a kind of calendering type thermoplastic polyurethane and
Its preparation method, the invention provides a kind of problem solving to stick roller in thermoplastic polyurethane calender line.The method is to pass through
In TPU resin, add additive, form sealing coat by the precipitation of additive, make TPU not stick roller, but additive
The sealing coat formed can hinder hydrone to pass through, and reduces the breathability of TPU film.Public announcement of a patent application number is " CN
103802340A " patent of invention disclose the preparation method of a kind of TPU calendered film, this invention uses Single screw extrusion
Machine combines inverted L shape four-roll calender and prepares TPU calendered film, TPU film prepared by the method possess thickness uniformly, produce
The advantages such as amount is big.But TPU film poor air permeability prepared by the method, it is impossible to as automobile cushion.
Summary of the invention
For the shortcoming of prior art, offer is provided and is used as automobile cushion TPU film and preparation thereof
Method, the TPU film of preparation has that good permeability, tear-resistant performance be good, thickness uniformly and the advantage such as brilliant point is few.
For reaching object above, the technical solution used in the present invention is:
The present invention provides a kind of TPU film, following component prepare: TPU resin 88-94 weight portion, PHA resin
4-8 weight portion, hydrolysis-resisting agent 1-2 weight portion, light stabilizer 0.5-1 weight portion, antioxidant 0.5-1 weight portion.
Preferably, described TPU resin polyether-type TPU, mean molecule quantity is 70,000-10 ten thousand.
Preferably, described PHA resin is beta-hydroxy-butanoic acid and 3-Hydroxycaprylic acid copolymer, and monomer ratio is: 1:1.2-1.3,
Molecular weight is 6000-10000.
Preferably, in described hydrolysis-resisting agent polycarbodiimide, maleic anhydride graft phenylethene-butadiene block copolymer
Kind.
Preferably, the one during described light stabilizer is UV531, UV770.
Preferably, at least one during described antioxidant is I1010, I168.
Accordingly, the present invention also provides for a kind of TPU film preparation method, comprises the following steps:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 88-94 parts by weight of pulverulent TPU resin, 4-8 parts by weight of pulverulent PHA resin, 1-2 weight portion resistant to hydrolysis
Agent, 0.5-1 weight portion light stabilizer, 0.5-1 weight portion antioxidant add homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 120-145 DEG C, two grades 150-155 DEG C.
Described Devolatilization device is arranged on planetary extruder two grades.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 135-140 DEG C, 2# roller: 135-140 DEG C, 3#
Roller: 140-145 DEG C, 4# roller: 150-160 DEG C, 5# roller: 165-170 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4#
Roller: 5# roller corresponds to 1:1.05-1.1:1.05-1.1:1.1-1.2:1.15-1.3.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 120-80 DEG C, embossing 80-70 DEG C, cooling 40-30 DEG C.
Described TPU film degree of crystallinity is 14%-17%.
Beneficial effect:
The present invention provides a kind of TPU film and preparation method thereof, compared with prior art, present invention employs and has long-chain
The PHA resin of aliphatic structure, as lubricant, prevents TPU from sticking extruded metal roller, owing to PHA resin is macromole
Structure, is difficult to separate out, and the breathability of TPU will not be produced impact.First by TPU resin low temperature pulverizing, squeeze in conjunction with planet
Go out machine plasticizing and five roll-ins are prolonged, improve TPU resin and the mixing uniformity of each auxiliary agent and plasticizing effect, reduce TPU
The quantity of thin film crystalline substance point.Have employed suitable technological temperature, effectively control the degree of crystallinity of TPU film, make TPU film
Between different batches, mechanical property difference is little, good permeability.Therefore, the TPU film thickness that prepared by the present invention is uniform, anti-tear
Split, crystalline substance is put less, good permeability, can be used for making automobile cushion.
Detailed description of the invention
Hereinafter describe and be used for disclosing the present invention so that those skilled in the art are capable of the present invention.Preferred reality in below describing
Execute example and be only used as citing, it may occur to persons skilled in the art that other obvious modification.
The present invention provides a kind of TPU film, following component prepare: TPU resin 88-94 weight portion, PHA resin
4-8 weight portion, hydrolysis-resisting agent 1-2 weight portion, light stabilizer 0.5-1 weight portion, antioxidant 0.5-1 weight portion.
Described TPU resin one thermoplastic elastomer (TPE), has polyether-type and polyester-type two kinds, and polyether-type TPU resin has resistance to
The advantage of hydrolysis.The TPU resin of the present invention is preferably polyether-type TPU resin, and mean molecule quantity is 70,000-10 ten thousand.
TPU film is mainly made to have suitable melt strength in preferable hydrolytic resistance and the course of processing.
Described PHA resin is a kind of bio-based polyester, containing aliphatic and ester group structure, has phase with polarity TPU resin
Capacitive.The PHA resin used contains 3-Hydroxycaprylic acid, has long-chain fatty acid structure, is possible to prevent TPU resin to stick
Stack, currently preferred PHA resin is beta-hydroxy-butanoic acid and 3-Hydroxycaprylic acid copolymer, and monomer ratio is: 1:
1.2-1.3, molecular weight is 6000-10000.
Described hydrolysis-resisting agent is preferably the one in polycarbodiimide, maleic anhydride graft phenylethene-butadiene block copolymer,
Utilize the crosslinking between TPU resin and hydrolysis-resisting agent and hydrogen bond, slow down the hydrolysis of TPU resin.The hydrolysis-resisting agent of the present invention
More preferably poly-carbodiimide.
Described light stabilizer is preferably the one in UV531, UV770, can slow down TPU film under action of ultraviolet light
Amino is oxidized, causes the phenomenon that TPU film turns yellow.The present invention is more preferably UV531.
Described antioxidant can slow down the oxidative degradation of TPU resin in TPU film molding process.The present invention is excellent
Elect at least one in I1010, I168 as.
Accordingly, the present invention also provides for the preparation method of a kind of TPU film, comprises the following steps:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 88-94 parts by weight of pulverulent TPU resin, 4-8 parts by weight of pulverulent PHA resin, 1-2 weight portion resistant to hydrolysis
Agent, 0.5-1 weight portion light stabilizer, 0.5-1 weight portion antioxidant add homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 120-145 DEG C, two grades 150-155 DEG C.
Described Devolatilization device is arranged on planetary extruder two grades, can effectively get rid of the volatile matter in plasticizing process.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 135-140 DEG C, 2# roller: 135-140 DEG C, 3#
Roller: 140-145 DEG C, 4# roller: 150-160 DEG C, 5# roller: 165-170 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4#
Roller: 5# roller corresponds to 1:1.05-1.1:1.05-1.1:1.1-1.2:1.15-1.3, prolongs due to five roll-ins and makes material on roller
The cladding time is longer compared with four-roll calendaring, and each component of TPU film can be made to plastify further, reduces crystalline substance point and produces.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 120-80 DEG C, embossing 80-70 DEG C, cooling 40-30 DEG C,
Can effectively control the degree of crystallinity change in the forming process of TPU film.
Described TPU film degree of crystallinity controls at 14%-17%, makes TPU film have preferable breathability.
In order to be further appreciated by the present invention, the technical scheme provided the present invention below in conjunction with embodiment is described in detail, this
The protection domain of invention is not limited by the following examples.
TPU resin used in the following embodiment of the present invention is provided by Bayer A.G.
PHA resin used in the following embodiment of the present invention is from Tianjin Green Biomaterial Co., Ltd..
Hydrolysis-resisting agent used in the following embodiment of the present invention is from Guangzhou Ai Chen Chemical Industry Science Co., Ltd.
Light stabilizer used in the following embodiment of the present invention is from Germany's BASF.
Antioxidant used in the following embodiment of the present invention comes from Ciba of Switzerland.
For the ease of comparing, all embodiments TPU film thickness be 100 microns.
Embodiment 1
Various raw material is weighed according to hereinafter described mass fraction ratio
TPU resin 88 weight portion, PHA resin 8 weight portion, hydrolysis-resisting agent poly-carbodiimide 2 weight portion, light are stable
Agent UV531 1 weight portion, antioxidant I1010 1 weight portion.
Described a kind of TPU film preparation method is as follows:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 88 parts by weight of pulverulent TPU resins, 8 parts by weight of pulverulent PHA resins, 2 weight portion hydrolysis-resisting agents, 1
Weight portion light stabilizer, 1 weight portion antioxidant add homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 120 DEG C, two grades 150 DEG C.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 135 DEG C, 2# roller: 135 DEG C, 3# roller: 140 DEG C,
4# roller: 150 DEG C, 5# roller: 165 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4# roller: 5# roller corresponds to 1:1.05:
1.05:1.1:1.15.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 80 DEG C, embossing 70 DEG C, cooling 30 DEG C.
Embodiment 2
Various raw material is weighed according to hereinafter described mass fraction ratio
TPU resin 94 weight portion, PHA resin 4 weight portion, hydrolysis-resisting agent poly-carbodiimide 1 weight portion, light are stable
Agent UV531 0.5 weight portion, antioxidant I1010 0.5 weight portion.
Described a kind of TPU film preparation method is as follows:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 94 parts by weight of pulverulent TPU resins, 4 parts by weight of pulverulent PHA resins, 1 weight portion hydrolysis-resisting agent, 0.5
Weight portion light stabilizer, 0.5 weight portion antioxidant add homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 145 DEG C, two grades 155 DEG C.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 140 DEG C, 2# roller: 140 DEG C, 3# roller: 145 DEG C,
4# roller: 160 DEG C, 5# roller: 1170 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4# roller: 5# roller corresponds to 1:1.1:
1.1:1.2:1.3.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 120 DEG C, embossing 80 DEG C, cooling 40 DEG C.
Embodiment 3
Various raw material is weighed according to hereinafter described mass fraction ratio
TPU resin 92.2 weight portion, PHA resin 5 weight portion, hydrolysis-resisting agent poly-carbodiimide 1.5 weight portion, light are steady
Determine agent UV531 0.7 weight portion, antioxidant I1010 0.6 weight portion.
Described a kind of TPU film preparation method is as follows:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 92.2 parts by weight of pulverulent TPU resins, 5 parts by weight of pulverulent PHA resins, 1.5 weight portion hydrolysis-resisting agents,
0.7 weight portion light stabilizer, 0.6 weight portion antioxidant add homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 140 DEG C, two grades 152 DEG C.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 138 DEG C, 2# roller: 136 DEG C, 3# roller: 143 DEG C,
4# roller: 155 DEG C, 5# roller: 168 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4# roller: 5# roller corresponds to 1:1.06:
1.08:1.15:1.25.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 100 DEG C, embossing 85 DEG C, cooling 35 DEG C.
Embodiment 4
Various raw material is weighed according to hereinafter described mass fraction ratio
TPU resin 96 weight portion, hydrolysis-resisting agent poly-carbodiimide 2 weight portion, light stabilizer UV531 1 weight portion,
Antioxidant I1010 1 weight portion.
Described a kind of TPU film preparation method is as follows:
(1) by TPU resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 96 parts by weight of pulverulent TPU resins, 2 weight portion hydrolysis-resisting agents, 1 weight portion light stabilizer, 1 weight portion
Antioxidant adds homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 145 DEG C, two grades 155 DEG C.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 140 DEG C, 2# roller: 140 DEG C, 3# roller: 145 DEG C,
4# roller: 160 DEG C, 5# roller: 1170 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4# roller: 5# roller corresponds to 1:1.1:
1.1:1.2:1.3.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 120 DEG C, embossing 80 DEG C, cooling 40 DEG C.
Embodiment 5
Various raw material is weighed according to hereinafter described mass fraction ratio
TPU resin 94 weight portion, PHA resin 4 weight portion, light stabilizer UV531 1 weight portion, antioxidant I1010
1 weight portion.
Described a kind of TPU film preparation method is as follows:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) by 94 parts by weight of pulverulent TPU resins, 4 parts by weight of pulverulent PHA resins, 1 weight portion light stabilizer, 1
Weight portion antioxidant adds homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film.
Described planetary extruder temperature is: one-level 145 DEG C, two grades 155 DEG C.
Employing F type five roll calendar is prolonged in described five roll-ins, and temperature is 1# roller: 140 DEG C, 2# roller: 140 DEG C, 3# roller: 145 DEG C,
4# roller: 160 DEG C, 5# roller: 1170 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4# roller: 5# roller corresponds to 1:1.1:
1.1:1.2:1.3.
Described deflect from, embossing, chilling temperature be respectively as follows: deflect from 120 DEG C, embossing 80 DEG C, cooling 40 DEG C.
In implementation process, owing to there is more serious glutinous roller phenomenon, it is impossible to preparation TPU film.
Comparative example
Implement according to the patent of invention disclosure that public announcement of a patent application number is " CN 103802340A ", prepare 100 microns
TPU film, as a comparison.
Detecting the TPU of embodiment of the present invention 1-5 respectively, and contrast with comparative example, result is as shown in table 1.
TPU film the performance test results prepared by table 1 embodiment of the present invention 1-5
Annotation: hydrothermal aging condition is 60 DEG C, humidity 80%, 400 hours.
The test result corresponding from embodiment 1-3 is it can be seen that TPU film prepared by the present invention removes hot strength and contrast
Outside example remains basically stable, other performance is superior to comparative example, has preferable tearing strength, breathability, hydrolytic resistance, and
Thickness point uniform, brilliant is few, can be used for making automobile cushion.
From embodiment 4-5 test result it can be seen that PHA resin sticks roller during being possible to prevent TPU resin calendering formation,
Calendering is made to process it is achieved that and moistened surface tension force is higher, unlubricated dose of precipitation.Hydrolysis-resisting agent can improve TPU
The hydrothermal aging performance of thin film, aging after-drawing strength retention is more than 90%.More than it is shown and described the present invention's
Ultimate principle, principal character and advantages of the present invention.Skilled person will appreciate that of the industry, the present invention is not by above-mentioned enforcement
The principle of the simply present invention described in the restriction of example, above-described embodiment and description, without departing from spirit and scope of the invention
On the premise of the present invention also have various changes and modifications, these changes and improvements both fall within the scope of claimed invention
In.The protection domain of application claims is defined by appending claims and equivalent thereof.
Claims (8)
1. a TPU film, it is characterised in that prepared by following component:
TPU resin 88-94 weight portion, PHA resin 4-8 weight portion, hydrolysis-resisting agent 1-2 weight portion, light stabilizer 0.5-1 weight portion, antioxidant 0.5-1 weight portion.
TPU film the most according to claim 1, it is characterised in that described TPU resin is polyether-type TPU, mean molecule quantity is 70,000-10 ten thousand.
TPU film the most according to claim 1, it is characterised in that described PHA resin is beta-hydroxy-butanoic acid and 3-Hydroxycaprylic acid copolymer, and monomer ratio is: 1:1.2-1.3, and molecular weight is 6000-10000.
TPU film the most according to claim 1, it is characterised in that described hydrolysis-resisting agent is the one in polycarbodiimide, maleic anhydride graft phenylethene-butadiene block copolymer.
TPU film the most according to claim 1, it is characterised in that described light stabilizer is the one in UV531, UV770.
TPU film the most according to claim 1, it is characterised in that described antioxidant is at least one in I1010, I168.
7. the preparation method of a TPU film, it is characterised in that comprise the following steps:
(1) by TPU resin, PHA resin at 10 DEG C-15 DEG C, it is broken into 30-50 mesh powdery；
(2) 88-94 parts by weight of pulverulent TPU resin, 4-8 parts by weight of pulverulent PHA resin, 1-2 weight portion hydrolysis-resisting agent, 0.5-1 weight portion light stabilizer, 0.5-1 weight portion antioxidant are added homogenizer mix homogeneously；
(3) mixed material prolongs through planetary extruder plasticizing, devolatilization, five roll-ins, deflects from, embossing, cooling prepare TPU
Thin film, wherein planetary extruder temperature is: one-level 120-145 DEG C, two grades 150-155 DEG C；
Devolatilization device is arranged on planetary extruder two grades；
Employing F type five roll calendar is prolonged in five roll-ins, temperature is 1# roller: 135-140 DEG C, 2# roller: 135-140 DEG C, 3# roller: 140-145 DEG C, 4# roller: 150-160 DEG C, 5# roller: 165-170 DEG C, roller speed ratio 1# roller: 2# roller: 3# roller: 4# roller: 5# roller corresponds to 1:1.05-1.1:1.05-1.1:1.1-1.2:1.15-1.3；
Deflect from, embossing, chilling temperature be respectively as follows: deflect from 120-80 DEG C, embossing 80-70 DEG C, cooling 40-30 DEG C.
The preparation method of a kind of TPU film the most according to claim 7, it is characterised in that described prepared TPU film degree of crystallinity is 14%-17%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141774A (en) * | 2017-06-28 | 2017-09-08 | 福州大学 | A kind of high transparency polyether-type bimirror face TPU film |
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| CN111169057A (en) * | 2020-03-06 | 2020-05-19 | 浙江佳阳塑胶新材料有限公司 | TPU film processing technology |
| WO2023184663A1 (en) * | 2022-03-29 | 2023-10-05 | 广东汇齐新材料有限公司 | High-temperature-washing-resistant tpu hot-melt adhesive film and preparation method therefor |
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