CN204674114U - Diaphragm, display unit - Google Patents
Diaphragm, display unit Download PDFInfo
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- CN204674114U CN204674114U CN201520197738.1U CN201520197738U CN204674114U CN 204674114 U CN204674114 U CN 204674114U CN 201520197738 U CN201520197738 U CN 201520197738U CN 204674114 U CN204674114 U CN 204674114U
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Abstract
The utility model provides a kind of diaphragm, display unit, belongs to display screen resist technology field, and it can solve existing diaphragm and peel off the large problem of noise.Diaphragm of the present utility model comprises: the basic unit be made up of PETG; Be positioned at the first adhesive layer of described basic unit side; Be located at the intermediate layer be made up of polyurethanes between described basic unit and the first adhesive layer.Diaphragm of the present utility model can be used for being attached on the display screen of the handheld device such as mobile phone, panel computer, to play a protective role.
Description
Technical field
The utility model belongs to display screen resist technology field, is specifically related to a kind of diaphragm, display unit.
Background technology
In the handheld device such as mobile phone, panel computer, display screen (comprising touching display screen) is important part.In order to prevent display screen damaged in the processes such as transport, sale, therefore before handheld device is dispatched from the factory, needing first to attach layer protecting film on its display screen, when user will bring into use, then this diaphragm being taken off.
As shown in Figure 1, existing diaphragm generally includes basic unit 1 and is located at the first adhesive layer 3 of basic unit 1 side.Basic unit 1 can be made up of PETG (PET) material, plays main protective effect.And the first adhesive layer 3 is made up of, for basic unit 1 being bondd on a display screen binding agents such as polyacrylic acid glue, silica gel, epoxide-resin glue, polyurethane adhesives.In addition, also can be provided with release layer 7 at the first adhesive layer 3 away from the side of basic unit 1, it produces unexpected bonding for preventing the first adhesive layer 3, and is torn before diaphragm is attached to display screen.
Although above-mentioned diaphragm can play a protective role, it can produce the sound (can reach tens of decibel) of comparatively large " whip " when taking off from display screen, cause the pollution of peeling off noise.Especially, diaphragm is normally taken off voluntarily by user, therefore peels off the experience that noise directly can affect user.
Utility model content
The utility model peels off the large problem of noise for existing diaphragm, and provide a kind of diaphragm, it can significantly reduce stripping noise.
The technical scheme that solution the utility model technical problem adopts is a kind of diaphragm, and it comprises:
The basic unit be made up of PETG;
Be positioned at the first adhesive layer of described basic unit side;
Be located at the intermediate layer be made up of polyurethanes between described basic unit and the first adhesive layer.
Wherein, the first adhesive layer is preferably formed by from wetting binding agent.
The utility model also provides a kind of display unit, and it comprises for carrying out the display screen shown; And be located at the said protection film of described display screen light emission side, described diaphragm is bonded on described display screen by the first adhesive layer.
In diaphragm of the present utility model; intermediate layer is added between basic unit and the first adhesive layer; the material (polyurethanes) in this intermediate layer is softer than the material (PETG) of basic unit; therefore the vibration of basic unit in stripping process can be reduced; and noise is produced by vibration, therefore diaphragm of the present utility model can play the effect reducing and peel off noise.
Diaphragm of the present utility model for being attached to the display screen of the handheld device such as mobile phone, panel computer, to play a protective role.
Accompanying drawing explanation
Fig. 1 is the side-looking structural representation of existing diaphragm;
Fig. 2 is the side-looking structural representation of a kind of diaphragm of embodiment of the present utility model;
Wherein, Reference numeral is: 1, basic unit; 3, the first adhesive layer; 5, intermediate layer; 7, release layer.
Detailed description of the invention
For making those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Detailed description of the invention:
As shown in Figure 2, the utility model provides a kind of diaphragm, and it comprises:
The basic unit 1 be made up of PETG (PET);
Be positioned at the first adhesive layer 3 of basic unit 1 side;
Be located at the intermediate layer 5 be made up of polyurethanes (PU) between basic unit 1 and the first adhesive layer 3.
Wherein, the effect of main protection display screen is played by basic unit 1, and it is made up of pet material.
Preferably, the thickness of this basic unit 1 is between 12 microns to 200 microns.
Basic unit 1 in above thickness range can play a very good protection.
The side of basic unit 1 is located in 5, intermediate layer, and is made up of polyurethane material, and because polyurethane material is softer than pet material, therefore it can reduce to be delivered to the vibration in basic unit 1, thus reduces stripping noise.
Preferably, the hot strength in this intermediate layer 5 is less than or equal to 50% of the hot strength of basic unit 1, and elongation at break is more than or equal to 50% of the elongation at break of basic unit 1, and stretch modulus is then less than or equal to 10% of the stretch modulus of basic unit 1.
That is, when being 100% with the value of the hot strength of basic unit 1, elongation at break, stretch modulus respectively, then the hot strength in intermediate layer 5 is no more than 50%, and elongation at break is not less than 50%, and stretch modulus is no more than 10%.
When meeting above mechanical property, can ensure that intermediate layer 5 than basic unit 1 more " soft ", thus playing better effectiveness in vibration suppression.
Concrete, for meeting above mechanical property, suitable, known pet material and polyurethane material can be selected respectively to manufacture basic unit 1 and intermediate layer 5.Therefore, should be appreciated that above description is not the restriction to new material, material composition, performance, but limit preferably to adopt and meet necessarily required known materials and form each layer.
Preferably, the thickness in intermediate layer 5 is between 10 microns to 200 microns.
The effect that noise is peeled off in enough reductions both can have been played in intermediate layer 5 in above thickness range, can not affect again other performance of diaphragm.
Wherein, it is various for realizing intermediate layer 5 with the method for the combination of basic unit 1, such as, can be coated on after polyurethane material melting in basic unit 1, treats that its curing agent forms intermediate layer 5; Or, also intermediate layer 5 shaping in advance can be attached in basic unit 1.
Obviously, the combination between intermediate layer 5 and basic unit 1 should be tried one's best firmly, in order to avoid the two is separated from each other.Such as, 180 degree of peel strengths between intermediate layer 5 and diaphragm are preferably greater than or equal to 500 grams/inch.
Preferably, also the second adhesive layer (not shown) can be set up between intermediate layer 5 and basic unit 1, to improve the bond strength between intermediate layer 5 and basic unit 1.Wherein, this second adhesive layer can adopt the conventional binding agents such as polyacrylic acid glue to form.
Preferably, basic unit 1 also can carry out sided corona treatment towards the side in intermediate layer 5 and/or intermediate layer 5 towards the side of basic unit 1, thus forms corona processing layer (not shown).
Sided corona treatment refers to carries out the technique of discharging with high-frequency high voltage on processed surface, it can form the corona processing layer with more high surface energy and roughness, thus plays the effect strengthening surface conjunction power.Wherein, the dyne value of above-mentioned corona processing layer is preferably greater than or equal to 38, the representative of dyne value be the surface tension of rete, its unit is 10
-5newton.
Preferably, the corona processing layer formed by sided corona treatment can be also provided with, to strengthen the adhesion between intermediate layer 5 and the first adhesive layer 3 in intermediate layer 5 away from the side of basic unit 1 (namely near the side of the first adhesive layer 3).
Wherein, the first adhesive layer 3 is located at the side of intermediate layer 5 away from basic unit 1, for being bondd on a display screen by diaphragm.
Preferably, this first adhesive layer 3 is formed by from wetting binding agent.
A kind of known binding agent from wetting binding agent, also referred to as being certainly vented binding agent.When using that some is attached in substrate from the rete of wetting binding agent, remainder can when not by when external force automatically by the gas discharge between binding agent and substrate, thus make rete integral plaster in substrate.Wherein, from soaking the performance of binding agent to represent from wetting speed, the speed of namely its automatic basad upper attaching.Typically, the binding agent being more than or equal to 0.3 inch per second from wetting speed is from wetting binding agent.
When the first adhesive layer 3 adopts from wetting binding agent formation, it can reach the effect better reducing and peel off noise on the one hand, on the other hand, also can realize lower adhesion strength.Wherein, why lower adhesion strength is preferred, be because the first adhesive layer 3 is for realizing separable provisional bonding, being taken off by diaphragm for ease of user, therefore its adhesion strength should not be too high.Concrete, 180 degree of peel strengths of this first adhesive layer 3 are preferably less than or equal to 25 grams/inch.
Preferably, from wetting binding agent be from wetting polyacrylic acid binding agent, from wetting silicone adhesive agent, any one in wetting polyurethane adhesive.
Above various binding agents are relatively more conventional known certainly wetting binding agent, and they have stable performance, advantage with low cost.
Preferably, the thickness of this first adhesive layer 3 is between 3 microns to 50 microns.
First adhesive layer 3 of above thickness both can reach enough bond effects, can avoid again the waste of material.
Preferably, said protection film also comprises: be located at the release layer 7 of the first adhesive layer 3 away from side, intermediate layer 5.
That is; the release layer 7 of stripping can be easy in the first adhesive layer 3 arranged outside; this release layer 7 can be the known mould release membrance product such as cotton paper mould release membrance, polyester release film; it is for protecting the first adhesive layer 3 under normal conditions; avoid the bonding made a mistake; and when diaphragm being pasted on a display screen, as long as first torn by release layer 7, the first adhesive layer 3 can be exposed to bond.
The utility model also provides a kind of display unit, and it comprises:
For carrying out the display screen shown;
Be located at the above-mentioned diaphragm (certainly not comprising release layer) of display screen light emission side, diaphragm by the first adhesive layer bonding on a display screen.
That is, above-mentioned diaphragm can be attached to outside display screen, to form the display unit comprising diaphragm.
Preferably, above display unit is the display unit for handheld device.
That is, be preferred for protecting the display screen of the handheld device such as mobile phone, panel computer with upper protective film.Certainly, the scope of application of this diaphragm is not limited to this, and it also can be used for the display screen protecting the miscellaneous equipments such as TV.
Below embodiment of the present utility model, comparative example and the performance test results thereof are introduced.
Wherein, the raw material used in embodiment of the present utility model, comparative example is as following table:
Table 1, stock chart
The performance of table 2, PET film and PU film
| Physical parameter | Unit | PET film | PU film |
| The hot strength in MD direction (film forming direction) | psi | >25,000 | <10,000 |
| The elongation at break in MD direction | ％ | 150 | >450 |
| The stretch modulus in MD direction | psi | >40,000 | <800 |
| Light transmittance | ％ | 70～93 | 70～93 |
| Mist degree | ％ | 0.3～10 | 0.3～10 |
| Density | g/cm 3 | 1.395 | 1.08 |
Wherein, the performance of above-mentioned PET film and PU film as shown above.Visible, the relation of their performance such as hot strength, elongation at break, stretch modulus meets above preferred requirement.
Below the preparation method of the diaphragm of each embodiment and comparative example is described.
The preparation method of the diaphragm of each embodiment comprises: the coating of PU material is formed PU layer on a pet film, thus obtains the structure in basic unit+intermediate layer; Wherein, for the L01 type PET film of thickness 50 microns, its PU layer thickness formed is 100 microns, and for the P11 type PET film of thickness 75 microns, its PU layer thickness formed is 50 microns.Applied adhesive outside intermediate layer, keeps 10 minutes in room temperature afterwards, then at the temperature of 120 degrees Celsius, heats 5 minutes with except desolventizing, obtains the first adhesive layer that thickness is 15 microns; Finally attach above-mentioned mould release membrance outward at the first adhesive layer.
For each comparative example, its preparation method and embodiment similar, difference is not comprise coating PU material and forms the step of PU layer, but directly by adhesive-coated on a pet film and form the first adhesive layer.
The binding agent used in preparation is divided into following 3 kinds, and binding agent 1 is wherein from wetting polyacrylic acid binding agent, and binding agent 2 is from wetting silicone adhesive agent, and binding agent 3 is conventional polyacrylic acid binding agent, does not belong to from wetting binding agent.
The formula of table 3, binding agent 1
| Project | Weight portion |
| 77125 | 80 |
| PPG1000 | 3 |
| Ethyl acetate | 16 |
| EC-92 | 1 |
| Solid content (%) | 32 |
The formula of table 4, binding agent 2
| Project | Weight portion |
| 7647 | 29 |
| 7645 | 10 |
| Toluene | 60 |
| 7028 | 1 |
| 297 | 1 |
| 4000 | 1 |
| Solid content (%) | 35 |
The formula of table 5, binding agent 3
| Project | Weight portion |
| CSA5360 | 80 |
| Ethyl acetate | 38 |
| L-75 | 5 |
| Solid content (%) | 32 |
Wherein, the binding agent provided in above each table is conventional, known binding agent, and the first adhesive layer also can adopt other known binding agent to form; Therefore, above description should not be considered as the restriction to protection domain of the present utility model, and does not represent the composition that the utility model will protect new material or material yet.
Introduce the performance test methods of the diaphragm to each embodiment and comparative example below, it comprises:
(1) 180 degree of peel strength test
Test condition: temperature 23 ± 2 DEG C, relative humidity 50 ± 10%.
Testing procedure: after the complete crosslinking curing of the first adhesive layer, respectively cuts the bar-shaped sample of 1 inch wide, 10 inches long from the position, left, center, right of diaphragm; With isopropyl alcohol and cleansing tissue by glass pane surface scrub, the mould release membrance of sample is peelled off and pastes on a glass; Once make sample fit with the roll-in of hand-held rubber roller, reduce bubble as far as possible; Back pressure sample is carried out once with the speed of 12 inch per minute clocks with automatic roller machine; Place after 20 minutes, start Imass SP-2000 type test machine (supplier: Instrumentor's company, the U.S.), the termination of sample is fixed on fixture, keep glass plate and drawn the peel angle of sample to be 180 degree; Arrange blank time 4 seconds, 20 seconds operating times, start with the speed stable promotion of 12 inch per minute clocks, record peel stress, terminates test when lax generation or sample exhaust; Retest three samples take average data as result of the test.
(2) test from wetting speed
Testing procedure: after the complete crosslinking curing of the first adhesive layer, respectively cuts the bar-shaped sample of 2 inches wide, 6 inches long from the position, left, center, right of diaphragm; With isopropyl alcohol and cleansing tissue by glass pane surface scrub; Tear the mould release membrance of sample, sample minor face (2 inches in length limits) is overlayed on the glass plate of 5 inches × 5 inches on, another hand-held live the opposite side of sample; Decontrol opposite side and start with manual time-keeping, sample meeting automatic laminating is on glass plate, the sample that record is greater than 90% pastes the time t that on glass plate, (namely attaching length is 5 inches) is used, then equal t/5 (unit: inch per second), using the average data of 3 samples as result of the test from wetting speed.
(3) noise test is peeled off
Method of testing: after the complete crosslinking curing of the first adhesive layer, respectively cuts the bar-shaped sample of 2 inches wide, 5 inches long from the position, left, center, right of diaphragm; With isopropyl alcohol and cleansing tissue by the front shroud of the display screen of iphone 4s surface scrub; Tear the mould release membrance of sample, sample hand-held rubber rollers is fitted to front shroud surface, left at room temperature 10 minutes; Sample is put into 5 centimeters below noise receiver, sample end is taken off to front shroud surface angle be 45 degree, keep this angle and divested by sample with the speed of 90 inch per minute clocks, the maximum noise in record stripping process, using the average data of 3 samples as result of the test.
Below the result of the test of the diaphragm of each embodiment and comparative example is analyzed:
Table 6, diaphragm performance
Visible; the stripping noise of the diaphragm of each embodiment is all lower than the stripping noise of the diaphragm (i.e. other condition identical but not containing the diaphragm in intermediate layer) of corresponding comparative example above, and this shows that increasing intermediate layer can reach the effect reducing and peel off noise really.
For embodiment (and comparative example) 1 to 4, its first adhesive layer be all greater than 0.3 inch per second from wetting speed, namely its first adhesive layer uses from wetting binding agent; And in embodiment (and comparative example) 5, employing be that the non-self being only 0.1 inch per second from wetting speed soaks binding agent.Visible, the stripping noise of the diaphragm of embodiment 1 to 4 is all far below the stripping noise of the diaphragm of embodiment 5; And; the reduction degree of the stripping noise of the diaphragm of the relatively corresponding comparative example of stripping noise of the diaphragm of embodiment 1 to 4 is larger; be at least about 10 decibels, and the stripping noise of the diaphragm of embodiment 5 is only low than the stripping noise of the diaphragm of corresponding comparative example 3.5 decibels.This shows, peel off in noise in reduction, adopting from soaking binding agent is preferred to diaphragm of the present utility model.Meanwhile, the corresponding data of 180 degree of peel strengths also more than the diaphragm of embodiment 5 of the diaphragm of embodiment 1 to 4 is low.This shows, adopts and forms the first adhesive layer, also to reduction peel strength helpful (thus being convenient to diaphragm to take off) from wetting binding agent.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present utility model is described and adopts, but the utility model is not limited thereto.For those skilled in the art, when not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (12)
1. a diaphragm, is characterized in that, comprising:
The basic unit be made up of PETG;
Be positioned at the first adhesive layer of described basic unit side;
Be located at the intermediate layer be made up of polyurethanes between described basic unit and the first adhesive layer.
2. diaphragm according to claim 1, is characterized in that,
The thickness of described basic unit is between 12 microns to 200 microns.
3. diaphragm according to claim 1, is characterized in that,
Described first adhesive layer is formed by from wetting binding agent.
4. diaphragm according to claim 3, is characterized in that,
Described from wetting binding agent be from wetting polyacrylic acid binding agent, from wetting silicone adhesive agent, any one in wetting polyurethane adhesive.
5. diaphragm according to claim 1, is characterized in that,
The thickness of described first adhesive layer is between 3 microns to 50 microns.
6. diaphragm according to claim 1, is characterized in that,
The thickness in described intermediate layer is between 10 microns to 200 microns.
7. diaphragm according to claim 1, is characterized in that,
The hot strength in described intermediate layer is less than or equal to 50% of the hot strength of basic unit;
The elongation at break in described intermediate layer is more than or equal to 50% of the elongation at break of basic unit;
The stretch modulus in described intermediate layer is less than or equal to 10% of the stretch modulus of basic unit.
8. diaphragm as claimed in any of claims 1 to 7, is characterized in that, also comprises:
Be located at the second adhesive layer between described basic unit and intermediate layer.
9. diaphragm as claimed in any of claims 1 to 7, is characterized in that,
There is towards the side in intermediate layer the corona processing layer formed by sided corona treatment in described basic unit;
And/or
There is towards the side of basic unit the corona processing layer formed by sided corona treatment in described intermediate layer;
And/or
There is away from the side of basic unit the corona processing layer formed by sided corona treatment in described intermediate layer.
10. diaphragm as claimed in any of claims 1 to 7, is characterized in that, also comprises:
Be located at the release layer of described first adhesive layer away from side, described intermediate layer.
11. 1 kinds of display unit, is characterized in that, comprising:
For carrying out the display screen shown;
Be located at the diaphragm described in any one in the claim 1 to 10 of described display screen light emission side, described diaphragm is bonded on described display screen by the first adhesive layer.
12. display unit according to claim 11, is characterized in that,
Described display unit is the display unit for handheld device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520197738.1U CN204674114U (en) | 2015-04-02 | 2015-04-02 | Diaphragm, display unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520197738.1U CN204674114U (en) | 2015-04-02 | 2015-04-02 | Diaphragm, display unit |
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| CN204674114U true CN204674114U (en) | 2015-09-30 |
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| CN201520197738.1U Active CN204674114U (en) | 2015-04-02 | 2015-04-02 | Diaphragm, display unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907326A (en) * | 2016-06-01 | 2016-08-31 | 罗吉尔 | Anti-ultraviolet outdoor advertisement protective film and preparation method thereof |
-
2015
- 2015-04-02 CN CN201520197738.1U patent/CN204674114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907326A (en) * | 2016-06-01 | 2016-08-31 | 罗吉尔 | Anti-ultraviolet outdoor advertisement protective film and preparation method thereof |
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