CN107277701A - A kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination - Google Patents
A kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination Download PDFInfo
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- CN107277701A CN107277701A CN201710688311.5A CN201710688311A CN107277701A CN 107277701 A CN107277701 A CN 107277701A CN 201710688311 A CN201710688311 A CN 201710688311A CN 107277701 A CN107277701 A CN 107277701A
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- 239000012528 membrane Substances 0.000 title claims abstract description 49
- 150000001875 compounds Chemical class 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000003475 lamination Methods 0.000 title claims abstract description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 138
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 138
- 238000000034 method Methods 0.000 claims abstract description 46
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 51
- 238000001125 extrusion Methods 0.000 claims description 37
- 238000003490 calendering Methods 0.000 claims description 18
- 235000011837 pasties Nutrition 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 12
- 230000032683 aging Effects 0.000 claims description 9
- 238000005238 degreasing Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 235000011266 Passiflora quadrangularis Nutrition 0.000 description 2
- 244000179684 Passiflora quadrangularis Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2207/00—Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00
- H04R2207/021—Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
- H04R2231/001—Moulding aspects of diaphragm or surround
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, it is improved on the longitudinal stretching of Conventional processing methods, by the way that the PTFE base band of different longitudinal stretching multiplying powers is overlapped, roll again, cross directional stretch, sintering sizing, a kind of compound e PTFE waterproof and breathable sound passing membranes finally prepared are carried out again, while puncture strength tensile strength is improved, improve waterproof and breathable entrant sound effect by regulating and controlling surface density size.Especially, in the effective area of identical entrant sound, when surface density reaches certain numerical value, it is lost in sound transmittance process small, using effect is more preferably.
Description
Technical field
Field, more particularly to a kind of waterproof and breathable compound by lamination are manufactured the invention belongs to electronic product accessory
The preparation method of sound passing membrane.
Background technology
Expanded PTFE has good physical property due to it, is widely used in mobile phone, intercom, DV, pen
Remember in the electronic products such as sheet, digital camera, the wearable device of meeting sounding, be mainly used in waterproof and breathable entrant sound, these are portable
Product, is required for by carrying out perforate at some position so that the ear that sound effectively can travel to people from enclosure interior is worked as
In., typically all can be using some productions in order to prevent that the challenge in the external world can be effectively coped with rugged environment in tapping
Product, such as acoustics grenadine, TPU membrane, e-PTFE films block the electronic component inside this perforate, effective protective housing, simultaneously
Keep good entrant sound effect.For acoustics grenadine, because its processing method is made by certain basketry, its is saturating
Sound, air permeable effect are good, but water proofing property is not good enough, and water resistance is being required than answering under relatively severe condition which has limited it
With；Its maximum advantage of TPU membrane is exactly that cheap, water resistance is splendid, but its substantially impervious gas.When back adhesive type TPU is anti-
Water sound passing membrane is affixed at the opening of portable product, once the increase of enclosure interior pressure, due to its air impermeability, can cause housing
Deformation, sound passing membrane misplace, so as to cause the unfavorable shadows such as housing seal failure, the entrance of dust rainwater, the failure of entrant sound effect
Ring；
E-PTFE waterproof ventilated membranes are that a kind of micropore obtained by special stretch processes is controllable（0.1 ~ 5 micron passes through
Stretching ratio, rate of extension, draft temperature control）Waterproof ventilated membrane.Its feature, when it is applied to the sounding of portable product
During position, the pressure that enclosure interior is produced can effectively be discharged by micropore, meanwhile, the size of its micropore only allows water to steam
Gas is passed through and dust, raindrop are not through, the component for the enclosure interior effectively protected.In addition, passing through e-PTFE waterproof and breathables
The surface density regulation and control of sound passing membrane, can to play remarkable entrant sound effect at positions such as receiver, microphone, loudspeakers, China is specially
Sharp document CN 102123863A disclose a kind of expanded PTFE（e-PTFE）Waterproof and breathable sound passing membrane, the film passes through one
Fixed lamination combination process, has obtained the MULTILAYER COMPOSITE waterproof and breathable sound passing membrane that surface density is sufficiently close to, while multiple by lamination
The product of conjunction, its tensile strength and puncture strength are also substantially improved, still, the patent of invention, are not through experiment
Method goes to verify influence of the different surface densities to sound loss.And surface density is more than with entrant sound effect into normal distribution relation.
When surface density is excessive, sound is through being that can not cause waterproof and breathable entrant sound vibration of membrane, so as to cause sound insertion loss very big；
Surface density is too small, and the high vibration of waterproof and breathable sound passing membrane can be caused during sound entrant sound, if vibration is excessively violent, it is meant that need
More energy are wanted to maintain, now, the penetration loss of sound can also increase.If a kind of product waterproof and breathable sound passing membrane energy
Reach the water proofing property for keeping good simultaneously, gas permeability, possess extraordinary puncture strength and tensile strength, meanwhile, can be by certain
Plant special process and make it that in effective entrant sound area the surface density of waterproof and breathable sound passing membrane is regulated and controled well, then, it is above-mentioned
Problem just can be readily solved.
The content of the invention
Puncture strength tensile strength and effective entrant sound size can not be taken into account simultaneously to solve above-mentioned prior art, due to
Surface density can not be regulated and controled very well, and cause the problems such as waterproof and breathable entrant sound effect is not good, and the present invention uses following technical side
Case：
The present invention provides a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, and preparation method includes following step
Suddenly：S1, batch mixing：Polytetrafluoroethylene (PTFE) is mixed by a certain percentage with extrusion aid；S2, ageing：The batch mixing obtained in step S1 is existed
30-60 DEG C of ageing 8-24h；It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations,
Wherein compression ratio is 1.5 ~ 3 times, and preforming pressure is 0.5 ~ 2.5MPa；S4, pasty state extrusion：Product in the step S3 is pre-
Shaping idiosome, which is delivered in pasty state extruder, to be extruded, and the compression ratio in extrusion is 20-50, and extrusion temperature is 40-60 DEG C, extrusion
Pressure is 1-4 MPa；S5, calendering：Product in step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band is obtained；S6、
Degreasing：The polytetrafluoroethylene (PTFE) base band obtained in step S5 is subjected to ungrease treatment at 200-250 DEG C；
S7, longitudinal stretching：Five PTFE base bands are picked out from step S6 product and carry out different multiples longitudinal stretching,
Then it is superimposed, carries out calendering process again, obtains certain thickness compound PTFE base band.Wherein, five PTFE bases
The longitudinal stretching technique of band is in following scope：Draft temperature be 251-300 DEG C, longitudinal stretching speed be 600-900 %/
Sec, longitudinal stretching multiplying power is 3-20 times；S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, laterally drawn
It is 251-300 DEG C to stretch temperature, and cross directional stretch speed is 600-900 %/sec, and cross directional stretch multiplying power is 11-20 times；S9, sintering：
Product in step S8 is sintered into 0.5-10min at 330-380 DEG C, the expander polytetrafluoroethylene (PTFE) waterproof and breathable is produced saturating
Sound film.
As improvement of the present invention, the polytetrafluoroethylene (PTFE) base band of described five different longitudinal stretching multiplying powers is by pressure
Prolong, then cross directional stretch, at least one layer of mean pore aperture is 0.45 μm in the composite construction of formation.
As a further refinement of the present invention, the polytetrafluoroethylene (PTFE) base band shape of described five different longitudinal stretching multiplying powers
Into composite construction in, by cross directional stretch technique, resulting finished product, the surface density of each layer of porous layer is 1 ~ 5g/m2.
As a further refinement of the present invention, the waterproof and breathable entrant sound film thickness is 15 ~ 35 μm, surface density be 1 ~
30g/m2, tensile strength is 50 ~ 110MPa, and puncture strength is 35 ~ 60kPam2/g.
The beneficial effects of the present invention are：By the way that the PTFE base band of different longitudinal stretching multiplying powers is overlapped, then roll,
Cross directional stretch, sintering sizing, a kind of compound e-PTFE waterproof and breathables sound passing membrane finally prepared, puncture strength stretching are carried out again
While intensity is improved, change surface density size and be lost small in waterproof and breathable entrant sound effect, sound transmittance process to improve, use
It is better.
Brief description of the drawings
Fig. 1 is 500 times of the SEM figures after polytetrafluoroethylene (PTFE) longitudinal stretching
Fig. 2 is 3000 times of the SEM figures after polytetrafluoroethylene (PTFE) longitudinal stretching.
Fig. 3 is 500 times of SEM figure of the polytetrafluoroethylene (PTFE) Jing Guo biaxial tension.
Fig. 4 is 3000 times of SEM figure of the polytetrafluoroethylene (PTFE) Jing Guo biaxial tension.
Embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
A kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, comprises the following steps：S1, batch mixing：Will be poly-
Tetrafluoroethene is mixed by a certain percentage with extrusion aid；S2, ageing：The batch mixing obtained in step S1 is aged 8- at 30-60 DEG C
24h；It is preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations, and wherein compression ratio is 1.5 ~ 3
Times, preforming pressure is 0.5 ~ 2.5MPa；S4, pasty state extrusion：The preforming idiosome of product in the step S4 is delivered into pasty state
Extruded in extruder, the compression ratio in extrusion is 20-50, extrusion temperature is 40-60 DEG C, and extrusion pressure is 1-4MPa；
S5, calendering：Product in step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band is obtained；S6, degreasing：By step S5
In obtained polytetrafluoroethylene (PTFE) base band ungrease treatment is carried out at 200-250 DEG C；S7, longitudinal stretching：From step S6 product
Pick out five PTFE base bands and carry out different multiples longitudinal stretching, be then superimposed, carry out calendering process again, obtain one
Determine the compound PTFE base band of thickness.Wherein, the longitudinal stretching technique of five polytetrafluoroethylene (PTFE) base band is in following scope：Stretching
Temperature is 251-300 DEG C, and longitudinal stretching speed is 600-900 %/sec, and longitudinal stretching multiplying power is 3-20 times；S8, laterally drawing
Stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 251-300 DEG C, and cross directional stretch speed is
600-900 %/sec, cross directional stretch multiplying power is 11-20 times；S9, sintering：By the product in step S8 in 330-380 DEG C of sintering
0.5-10min, produces the expander polytetrafluoroethylene (PTFE) waterproof and breathable sound passing membrane.Wherein, five different longitudinal stretching multiplying powers
Polytetrafluoroethylene (PTFE) base band by calendering, then cross directional stretch, at least one layer of mean pore aperture in the composite construction of formation
For 0.45 μm, this is that the classification of waterproof for ensureing composite membrane can reach IP68 premise.
In the present invention, the surface density of each layer of porous layer is in the composite construction of five polytetrafluoroethylene (PTFE) base band formation
1 ~ 5g/m2, turns into thickness by interaction force between layers and is combined in 15 ~ 35 μm of e-PTFE waterproof and breathables entrant sound
Film, described e-PTFE waterproof and breathable entrant sound composite membranes, except when in have one layer of mean pore outer for 0.45 μm, other levels
Micropore size does not limit size, and the surface density for only adjusting composite membrane is used, and described e-PTFE waterproof and breathable entrant sounds composite membrane is drawn
Intensity is stretched in 50 ~ 110MPa.Described e-PTFE waterproof and breathable entrant sound composite membrane puncture strengths are in 35 ~ 60kPam2/g.
In order to be better understood from the preparation process of the application, the inside has several technical terms to need to explain, as follows：1、
E-PTFE waterproof and breathable sound passing membranes：E-PTFE perforated membranes, because its micropore is at 0.22 ~ 5 μm or so, only allow water vapour molecule
（0.0004μm）Pass through, and small water droplet, raindrop, dust etc.（General 50 μm of ＞）It can not pass through.Meanwhile, the waterproof ventilated membrane has again
Standby good sound passes through effect；
2nd, surface density：The grammes per square metre of the e-PTFE waterproof and breathable sound passing membranes of unit area, unit：g/cm2；
3rd, PTFE base band：The PTFE powder raw material of decentralized is mixed with extrusion aid, is then prepared into by pasty state expressing technique
The solid idiosome of PTFE toroidals, then idiosome process is rolled into sheet material, then carry out de- extrusion aid, longitudinal stretching；
4th, sound insertion loss：The propagation of sound is the vibration by causing surrounding medium and propagated, and is triggering vibration of media
Process is converted into the energy loss of the mechanical energy of medium by sound wave.Unit, dB.
The waterproof and breathable sound passing membrane obtained by laminated multi-layer produced with combination, physical properties are greatly promoted, and are punctured strong
While spending tensile strength raising, waterproof and breathable entrant sound is better, and using effect is more preferably.
Illustrated below with several embodiments:
Embodiment 1
The invention provides a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, the raw material trade mark of selection is big
Golden F106 polytetrafluoroethylene (PTFE) is mixed with isomeric alkane hydro carbons solvent naphtha Isopar-C.
Preparation method comprises the following steps,
S1, batch mixing：The Isopar-C that the great Jin F106 boards polytetrafluoroethylene (PTFE) for being 75% by mass fraction is 25% with mass fraction is mixed
Close uniform；
S2, ageing：The batch mixing obtained in step S1 is aged 12h at 35 DEG C；
It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations, and wherein compression ratio is 2
Times, preforming pressure is 2MPa；
S4, pasty state extrusion：The preforming idiosome of product in the step S3 is delivered in pasty state extruder and extruded, in extrusion
Compression ratio be 50, extrusion temperature be 50 DEG C, extrusion pressure be 4 Mpa；
S5, calendering：Product in the step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band, described poly- four is obtained
The thickness of fluoride-based band is 0.8mm, during width is 11cm, calender line, and the speed of two rollers of the calender is 2m/
min；
S6, degreasing：The polytetrafluoroethylene (PTFE) base band obtained in the step S5 is subjected to ungrease treatment at 225 DEG C；
S7, longitudinal stretching：Five PTFE base bands are picked out from step S6 product and carry out different multiples longitudinal stretching
Overlap-add procedure.
1st article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, longitudinal stretching times
Rate is 3 times；
2nd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
5 times；
3rd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
7 times；
4th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
9 times；
5th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
11 times.
Then, the PTFE base band of above-mentioned five different longitudinal stretching multiplying powers is overlapped calendering and obtains certain multiplicity
Compound PTFE base band；
S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 270 DEG C, is laterally drawn
Speed is stretched for 700 %/sec, and cross directional stretch multiplying power is 12 times；
S9, sintering：Product in the step S8 is sintered into 1min at 360 DEG C, the expander polytetrafluoroethylene (PTFE) is produced artificial
The sample 1 of waterproof and breathable sound passing membrane.
Embodiment 2
The invention provides a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, the raw material trade mark of selection is big
Golden F106 polytetrafluoroethylene (PTFE) is mixed with isomeric alkane hydro carbons solvent naphtha Isopar-C.
Preparation method comprises the following steps,
S1, batch mixing：The Isopar-C that the great Jin F106 boards polytetrafluoroethylene (PTFE) for being 75% by mass fraction is 25% with mass fraction is mixed
Close uniform；
S2, ageing：The batch mixing obtained in step S1 is aged 12h at 35 DEG C；
It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations, and wherein compression ratio is 2
Times, preforming pressure is 2MPa；
S4, pasty state extrusion：The preforming idiosome of product in the step S3 is delivered in pasty state extruder and extruded, in extrusion
Compression ratio be 50, extrusion temperature be 50 DEG C, extrusion pressure be 4 Mpa；
S5, calendering：Product in the step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band, described poly- four is obtained
The thickness of fluoride-based band is 0.8mm, during width is 11cm, calender line, and the speed of two rollers of the calender is 2m/
min；
S6, degreasing：The polytetrafluoroethylene (PTFE) base band obtained in the step S5 is subjected to ungrease treatment at 225 DEG C；
S7, longitudinal stretching：Five PTFE base bands are picked out from step S6 product and carry out different multiples longitudinal stretching
Overlap-add procedure.
1st article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, longitudinal stretching times
Rate is 3 times；
2nd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
6 times；
3rd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
9 times；
4th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
12 times；
5th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
15 times.
Then, the PTFE base band of above-mentioned five different longitudinal stretching multiplying powers is overlapped calendering and obtains certain multiplicity
Compound PTFE base band；
S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 270 DEG C, is laterally drawn
Speed is stretched for 700 %/sec, and cross directional stretch multiplying power is 16 times；
S9, sintering：Product in the step S8 is sintered into 1min at 360 DEG C, the expander polytetrafluoroethylene (PTFE) is produced artificial
The sample 2 of waterproof and breathable sound passing membrane.
Embodiment 3
The invention provides a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, the raw material trade mark of selection is big
Golden F106 polytetrafluoroethylene (PTFE) is mixed with isomeric alkane hydro carbons solvent naphtha Isopar-C.
Preparation method comprises the following steps,
S1, batch mixing：The Isopar-C that the great Jin F106 boards polytetrafluoroethylene (PTFE) for being 75% by mass fraction is 25% with mass fraction is mixed
Close uniform；
S2, ageing：The batch mixing obtained in step S1 is aged 12h at 35 DEG C；
It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations, and wherein compression ratio is 2
Times, preforming pressure is 2MPa；
S4, pasty state extrusion：The preforming idiosome of product in the step S3 is delivered in pasty state extruder and extruded, in extrusion
Compression ratio be 50, extrusion temperature be 50 DEG C, extrusion pressure be 4 MPa；
S5, calendering：Product in the step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band, described poly- four is obtained
The thickness of fluoride-based band is 0.8mm, during width is 11cm, calender line, and the speed of two rollers of the calender is 2m/
min；
S6, degreasing：The polytetrafluoroethylene (PTFE) base band obtained in the step S5 is subjected to ungrease treatment at 225 DEG C；
S7, longitudinal stretching：Five PTFE base bands are picked out from step S6 product and carry out different multiples longitudinal stretching
Overlap-add procedure.
1st article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, longitudinal stretching times
Rate is 3 times；
2nd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
7 times；
3rd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
11 times；
4th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
15 times；
5th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
19 times.
Then, the PTFE base band of above-mentioned five different longitudinal stretching multiplying powers is overlapped calendering and obtains certain multiplicity
Compound PTFE base band；
S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 270 DEG C, is laterally drawn
Speed is stretched for 700 %/sec, and cross directional stretch multiplying power is 18 times, and the pattern of product is as shown in Figure 3 and Figure 4；
S9, sintering：Product in the step S8 is sintered into 1min at 360 DEG C, the expander polytetrafluoroethylene (PTFE) waterproof is produced
The sample 3 of ventilative sound passing membrane.
Embodiment 4
The invention provides a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, the raw material trade mark of selection is big
Golden F106 polytetrafluoroethylene (PTFE) is mixed with isomeric alkane hydro carbons solvent naphtha Isopar-C.
Preparation method comprises the following steps,
S1, batch mixing：The Isopar-C that the great Jin F106 boards polytetrafluoroethylene (PTFE) for being 75% by mass fraction is 25% with mass fraction is mixed
Close uniform；
S2, ageing：The batch mixing obtained in step S1 is aged 12h at 35 DEG C；
It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations, and wherein compression ratio is 2
Times, preforming pressure is 2MPa；
S4, pasty state extrusion：The preforming idiosome of product in the step S3 is delivered in pasty state extruder and extruded, in extrusion
Compression ratio be 50, extrusion temperature be 50 DEG C, extrusion pressure be 4 MPa；
S5, calendering：Product in the step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band, described poly- four is obtained
The thickness of fluoride-based band is 0.8mm, during width is 11cm, calender line, and the speed of two rollers of the calender is 2m/
min；
S6, degreasing：The polytetrafluoroethylene (PTFE) base band obtained in the step S5 is subjected to ungrease treatment at 225 DEG C；
S7, the 1st article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, longitudinal stretching times
Rate is 3 times；
2nd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
5 times；
3rd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
7 times；
4th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
9 times；
5th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
11 times.
Then, the PTFE base band of above-mentioned five different longitudinal stretching multiplying powers is overlapped calendering and obtains certain multiplicity
Compound PTFE base band；
S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 270 DEG C, is laterally drawn
Speed is stretched for 700 %/sec, and cross directional stretch multiplying power is 18 times；
S9, sintering：Product in the step S8 is sintered into 1min at 360 DEG C, the expander polytetrafluoroethylene (PTFE) waterproof is produced
The sample 4 of ventilative sound passing membrane.
Embodiment 5
The invention provides a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, the raw material trade mark of selection is big
Golden F106 polytetrafluoroethylene (PTFE) is mixed with isomeric alkane hydro carbons solvent naphtha Isopar-C.
Preparation method comprises the following steps,
S1, batch mixing：The Isopar-C that the great Jin F106 boards polytetrafluoroethylene (PTFE) for being 75% by mass fraction is 25% with mass fraction is mixed
Close uniform；
S2, ageing：The batch mixing obtained in step S1 is aged 12h at 35 DEG C；
It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out pre-forming operations, and wherein compression ratio is 2
Times, preforming pressure is 2MPa；
S4, pasty state extrusion：The preforming idiosome of product in the step S3 is delivered in pasty state extruder and extruded, in extrusion
Compression ratio be 50, extrusion temperature be 50 DEG C, extrusion pressure be 4 Mpa；
S5, calendering：Product in the step S4 is delivered in calender and rolled, polytetrafluoroethylene (PTFE) base band, described poly- four is obtained
The thickness of fluoride-based band is 0.8mm, during width is 11cm, calender line, and the speed of two rollers of the calender is 2m/
min；
S6, degreasing：The polytetrafluoroethylene (PTFE) base band obtained in the step S5 is subjected to ungrease treatment at 225 DEG C；
S7, longitudinal stretching：Five PTFE base bands are picked out from step S6 product and carry out different multiples longitudinal stretching
Overlap-add procedure.
1st article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, longitudinal stretching times
Rate is 3 times；
2nd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
7 times；
3rd article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
11 times；
4th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
15 times；
5th article of base band technique：Longitudinal drawing temperature is 270 DEG C, and longitudinal stretching speed is 700 %/sec, and longitudinal stretching multiplying power is
12 times.
Then, the PTFE base band of above-mentioned five different longitudinal stretching multiplying powers is overlapped calendering and obtains certain multiplicity
Compound PTFE base band；
S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 270 DEG C, is laterally drawn
Speed is stretched for 700 %/sec, and cross directional stretch multiplying power is 12 times；
S9, sintering：Product in the step S8 is sintered into 1min at 360 DEG C, the expander polytetrafluoroethylene (PTFE) waterproof is produced
The sample 5 of ventilative sound passing membrane.
Longitudinal stretching postjunction and fiber are carried out to the sample in embodiment 1-5 after longitudinal direction size and biaxial tension
Its drawing process is shown in such as table 1 below；
The drawing process of the polytetrafluoroethylene (PTFE) base band of the different levels of table 1 and compound rear base band
Node and fiber size are tested (SEM form shape appearance figures are shown in Fig. 1 ~ 4), and its test result is as follows：
The typical expanded polytetrafluoroethylsealing waterproof and breathable sound passing membrane physical property table of table 2
| It is real Test Group | Stretching is strong Degree, MPa | Puncture strength, kPa·m2/g | It is average Micropore, μm | It is thick Degree, μm | Face is close Degree, g/ m2 | Sound loss, dB has Imitate test area 3.14mm2 | Sound loss, dB, effectively Test area 0.785mm2 | Protection Grade | Air permenbility, ml/ cm2/min@ 70mBar |
| Sample Product 1 | 79.56 | 50.45 | 0.33 | 35. 56 | 20 | 6 | 8 | IP68 | 800 |
| Sample Product 2 | 109.67 | 59.90 | 0.45 | 31. 29 | 8 | 2.5 | 2.9 | IP68 | 1000 |
| Sample Product 3 | 49.89 | 39.33 | 0.62 | 25. 45 | 3 | 4.1 | 3.7 | IP68 | 1250 |
| Sample Product 4 | 107.67 | 43.23 | 0.48 | 30. 87 | 10 | 3.2 | 2.0 | IP68 | 1100 |
| Sample Product 5 | 98.78 | 57.90 | 0.5 | 29. 98 | 13 | 4.3 | 3.4 | IP68 | 1050 |
From Table 2, it can be seen that the micropore size of all samples in the present embodiment is 0.1-0.45 μm, thickness is 15 ~ 35 μ
M, surface density is in 1 ~ 30g/m2, tensile strength is in 50 ~ 110MPa, and puncture strength is in 35 ~ 60kPam2/ g so that the waterproof of preparation
While ventilative sound passing membrane has good waterproof, ventilative, entrant sound effect, have concurrently again and possessed extraordinary puncture strength and drawing
Stretch intensity.
Above-described embodiment and non-limiting product form of the invention and style, the ordinary skill people of any art
Appropriate change or modification that member is done to it, all should be regarded as not departing from the patent category of the present invention.
Claims (4)
1. a kind of preparation method of the waterproof and breathable sound passing membrane compound by lamination, it is characterised in that：Preparation method includes following
Step：S1, batch mixing：Polytetrafluoroethylene (PTFE) is mixed by a certain percentage with extrusion aid；S2, ageing：The batch mixing that will be obtained in step S1
8-24h is aged at 30-60 DEG C；It is S3, preforming：The product that S2 steps are obtained, which is put into preforming machine, carries out preforming behaviour
Make, wherein compression ratio is 1.5 ~ 3 times, preforming pressure is 0.5 ~ 2.5MPa；S4, pasty state extrusion：By the production in the step S3
The preforming idiosome of thing is delivered in pasty state extruder and extruded, and the compression ratio in extrusion is 20-50, and extrusion temperature is 40-60 DEG C,
Extrusion pressure is 1-4 MPa；S5, calendering：Product in step S4 is delivered in calender and rolled, PTFE base is obtained
Band；S6, degreasing：The polytetrafluoroethylene (PTFE) base band obtained in step S5 is subjected to ungrease treatment at 200-250 DEG C；S7, longitudinal direction are drawn
Stretch：Five PTFE base bands are picked out from step S6 product and carry out different multiples longitudinal stretching, are then superimposed, again
Calendering process is carried out, certain thickness compound PTFE base band is obtained；Wherein, the longitudinal stretching work of five polytetrafluoroethylene (PTFE) base band
Skill is in following scope：Draft temperature is 251-300 DEG C, and longitudinal stretching speed is 600-900 %/sec, longitudinal stretching multiplying power
For 3-20 times；S8, cross directional stretch：Product in step S7 is subjected to cross directional stretch processing, transverse drawing temperature is 251-300
DEG C, cross directional stretch speed is 600-900 %/sec, and cross directional stretch multiplying power is 11-20 times；S9, sintering：By the product in step S8
0.5-10min is sintered at 330-380 DEG C, the expander polytetrafluoroethylene (PTFE) waterproof and breathable sound passing membrane is produced.
2. a kind of preparation method of waterproof and breathable sound passing membrane compound by lamination according to claim 1, its feature exists
In：The polytetrafluoroethylene (PTFE) base band of described five different longitudinal stretching multiplying powers is by calendering, then cross directional stretch, the composite junction of formation
At least one layer of mean pore aperture is 0.45 μm in structure.
3. a kind of preparation method of waterproof and breathable sound passing membrane compound by lamination according to claim 1, its feature exists
In：In the composite construction of the polytetrafluoroethylene (PTFE) base band formation of described five different longitudinal stretching multiplying powers, by cross directional stretch work
Skill, resulting finished product, the surface density of each layer of porous layer is 1 ~ 5g/m2.
4. a kind of preparation method of waterproof and breathable sound passing membrane compound by lamination according to claim 1, its feature exists
In：The waterproof and breathable entrant sound film thickness is 15 ~ 35 μm, surface density is 1 ~ 30g/m2, tensile strength is 50 ~ 110MPa, is punctured
Intensity is 35 ~ 60kPam2/g。
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| EP3781848A1 (en) * | 2018-06-06 | 2021-02-24 | SGL Carbon SE | Layer composite for a seal |
| CN112745608A (en) * | 2020-12-29 | 2021-05-04 | 施柏德（厦门）科技有限公司 | PTFE composite material with excellent uniformity and manufacturing process and application thereof |
| CN114102949A (en) * | 2021-11-16 | 2022-03-01 | 浙江格尔泰斯环保特材科技股份有限公司 | Preparation method of polytetrafluoroethylene composite microporous membrane and composite microporous membrane |
| CN114770992A (en) * | 2022-04-22 | 2022-07-22 | 睿得新材料科技(佛山)有限公司 | Preparation method of polytetrafluoroethylene stretching belt, stretching belt and preparation device |
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