A method for preparing a privacy film

Abstract

The application discloses a kind of preparation methods of privacy film, belong to screen protection film technical field, a kind of preparation methods of privacy film, including the following steps: step A1: modified glue is imprinted and forms long strip-shaped groove, by UV solidification 2-5s, obtain connection layer, the raw material of modified glue includes modified silane coupling agent, modified silane coupling agent contains fluoroalkyl chain, amide group, disulfide bond and imine bond;Step A2: UV color paste is added to modified glue, and stirring is mixed uniformly to obtain black glue, black glue is filled into long strip-shaped groove, and connection layer is compounded on the surface of PET layer, again UV solidification 2-5s, obtain privacy film.The privacy film prepared by the application has self-repairing and other properties, and has wide application prospect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of screen protection films, and particularly relates to a preparation method of a privacy protection film. BACKGROUND

[0002] With the popularity of electronic devices and the enhancement of people's awareness of personal privacy protection, the privacy protection film as a kind of privacy protection material capable of effectively protecting the information of a display screen has been widely applied. The privacy protection film is designed by special optics, so that when viewing the display screen, the user can clearly see the information on the screen, meeting the normal viewing demand. However, when the line of sight deviates by a certain angle, the information on the screen will become blurred or even cannot be seen, and this feature enables the privacy protection film to provide better personal privacy protection in public space.

[0003] Although the privacy protection film exhibits excellent performance in providing privacy protection, the existing privacy protection film products on the market still have obvious short boards in the self-repairing property. In the daily frequent operation environment, the display screen is inevitably subjected to scratches, impacts and other mechanical damages. Since the privacy protection film is closely attached to the surface layer of the display screen, the strength of the self-repairing ability of the privacy protection film is directly related to the protection efficiency and long service life of the display screen. If the self-repairing performance of the privacy protection film is poor, the privacy protection film is easily damaged once subjected to external impact, which not only interferes with the normal use experience of the user, but also weakens the privacy protection efficiency. SUMMARY

[0004] In order to solve the problem of the obvious short boards in the self-repairing property of the existing privacy protection film in the background art, the purpose of the present application is to provide a preparation method of a privacy protection film.

[0005] The purpose of the present application can be achieved by the following technical scheme:

[0006] A preparation method of a privacy protection film, comprising the following steps:

[0007] Step A1: pressing and forming a long strip-shaped groove in modified glue, and obtaining a connecting layer by UV curing for 2-5s, wherein the raw material of the modified glue comprises a modified silane coupling agent containing a fluoroalkyl chain, an amide group, a disulfide bond and an imine bond;

[0008] Step A2: adding UV color paste into the modified glue, stirring and mixing uniformly to obtain black glue, filling the black glue into the long strip-shaped groove, and compounding the connecting layer on the surface of the PET layer, and then UV curing for 2-5s to obtain the privacy protection film;

[0009] The mass ratio of the UV color paste to the modified glue is (94-98):(2-6).

[0010] Since the modified glue contains fluorinated alkyl chain, amide group, disulfide bond and imine bond, the obtained connecting layer and black glue also have these groups, so that the privacy film also has these components.

[0011] The fluorinated alkyl chain has lower surface energy. The low surface energy characteristics of the fluorinated alkyl chain make the surface of the privacy film form a thin film that is difficult to be infiltrated by water, oil and other liquids. This thin film not only has excellent water resistance, but also effectively prevents the adhesion of substances such as fingerprints and stains, thereby improving the anti-fingerprint and stain resistance of the privacy film. In addition, the fluorinated alkyl chain has a hydrophobic long chain, which can also improve the hydrophobicity of the privacy film. The film with high hydrophobicity has more excellent anti-fingerprint ability. Further, since the siloxane group has the characteristic of low surface energy, it can effectively reduce the adhesion of the surface of the privacy film, making it more difficult for contaminants such as oil and protein in fingerprints to adhere to the film surface. When the finger contacts the privacy film, the contaminants in the fingerprint are more easily wiped off without leaving obvious marks, further improving the anti-fingerprint and stain resistance of the privacy film. Both of the above-mentioned groups can form a uniform thin film on the surface of the film. The smooth and smooth thin film can reduce the diffusion of light on the film surface, so that the privacy film has a certain light transmittance while having a privacy function, thereby facilitating the reduction of visual fatigue.

[0012] The imine bond is a reversible dynamic covalent bond carbon-nitrogen double bond at room temperature. The self-repairing process of the imine bond is a dynamic equilibrium process. Inside the material, the breaking and recombination of the imine bond continuously occur, so that the material can repair itself to a certain extent and maintain its integrity and performance. The disulfide bond has low bond energy and can break or undergo reversible reaction under external stimuli such as light and heat. Therefore, materials containing disulfide bonds exhibit repairable processing, shape change and other functions like thermoplastic materials. The privacy film prepared by the modified glue containing the above-mentioned groups has self-repairing function.

[0013] The amide group has strong intermolecular interaction force, which can enhance the compatibility and binding force between the modified silane coupling agent and the organic materials such as UV monomer, epoxy acrylate resin and UV forming resin. The introduction of amide group can make the connecting layer have better flexibility and strength after curing, thereby improving the overall mechanical properties of the privacy film.

[0014] Further, the preparation method of the modified glue is as follows:

[0015] The absorbent, oxidizing agent, modified silane coupling agent and photoinitiator are dissolved into the UV monomer at 50-80°C, and the epoxy acrylate resin and UV forming resin are added. After stirring uniformly, the defoaming agent and leveling agent are added, and vacuum degassing is performed to obtain the modified glue.

[0016] The weight ratio of the absorbent, the oxidizing agent, the modified silane coupling agent, the photoinitiator, the UV monomer, the epoxy acrylate resin, the UV forming resin, the defoaming agent, and the leveling agent is (1-2):1:(2-4):(3-5):40:25:20:(0.5-1):(0.5-1).

[0017] Further, the absorbent is UV400; the oxidizing agent is non-toxic phosphite 1500; the photoinitiator is composed of 80wt% of 2-methyl-1-(4-methylthio phenyl)-2-morpholine-1-propanone and 20wt% of 2-isopropyl thioxanthone; the defoaming agent is BYK1790 defoaming agent; and the leveling agent is BYK361N leveling agent.

[0018] Further, the UV monomer includes one or more of trimethylolpropane triacrylate, hexanediol diacrylate, isobornyl acrylate, and 2-phenoxyethyl acrylate.

[0019] Further, the vacuum defoaming condition is a temperature of 20-50℃ and a pressure of -0.1MPa to -0.05MPa.

[0020] Further, the preparation method of the modified silane coupling agent is as follows:

[0021] Step B1: cystine is added to a 2mol / L sodium hydroxide aqueous solution to obtain solution A; 1H,1H,2H-perfluorooctanal is dissolved in anhydrous DMF to obtain solution B, and solution B is added dropwise to solution A, stirred for 20-40min, cooled to 0-4℃, and then 0.07g of sodium borohydride is added, reacted at room temperature for 90min, extracted with anhydrous diethyl ether, filtered, and dried to obtain a perfluorocystine derivative;

[0022] The weight ratio of cystine, the sodium hydroxide aqueous solution, 1H,1H,2H-perfluorooctanal, anhydrous ethanol, and sodium borohydride is 0.79g:2.5mL:2.39g:7.5mL:0.07g.

[0023] In the above step, the amino group of cystine reacts with the aldehyde group of 1H,1H,2H-perfluorooctanal to form an imine bond to obtain a perfluorocystine derivative.

[0024] Step B2: the perfluorocystine derivative is dissolved in anhydrous DMF, and then 3-aminopropyl triethoxysilane, EDCl [1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride], and pyridine are added, and reacted at 25℃ for 8-9h, filtered, washed, and dried to obtain a modified silane coupling agent.

[0025] The amount ratio of perfluorocysteic acid derivative, anhydrous DMF, 3-aminopropyl triethoxysilane, EDCl and pyridine is 0.93g:20-30mL:0.44g:0.38g:0.16g.

[0026] In the above step, the carboxyl group of the perfluorocysteic acid derivative can react with the amino group of the 3-aminopropyl triethoxysilane to generate an amide bond by amide reaction, to obtain the modified silane coupling agent, with EDCl as a coupling agent and pyridine as a catalyst.

[0027] The beneficial effects of the present application are:

[0028] 1. The anti-peeping film prepared by the present application has good anti-fingerprint performance, hydrophobic performance and self-repairing performance of more than 97.3%, and has high flexibility, and can be applied to various electronic screens and has wide application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Preparation Example 1

[0031] The preparation method of the modified silane coupling agent of the present preparation example is:

[0032] Step B1: 0.79g cysteic acid is added to 2.5mL 2mol / L sodium hydroxide aqueous solution to obtain solution A; 2.39g 1H,1H,2H-perfluorooctanal is dissolved in 7.5mL anhydrous DMF to obtain solution B, 2.5mL solution B is added dropwise to 7.5mL solution A, stirred for 20min, cooled to 4℃, 0.07g sodium borohydride is added, reacted at room temperature for 90min, extracted with anhydrous diethyl ether, filtered and dried to obtain perfluorocysteic acid derivative;

[0033] Step B2: 0.93g perfluorocysteic acid derivative is dissolved in 30mL anhydrous DMF, then 0.44g 3-aminopropyl triethoxysilane, 0.38g EDCl [1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride] and 0.16g pyridine are added, reacted at 25℃ for 8h, filtered, washed and dried to obtain the modified silane coupling agent.

[0034] Preparation Example 2

[0035] The preparation method of the modified silane coupling agent of the present preparation example is:

[0036] Step B1: 0.79 g of cystine was added to 2.5 mL of 2 mol / L aqueous sodium hydroxide solution to obtain solution A; 2.39 g of 1H, 1H, 2H-perfluorooctanal was dissolved in 7.5 mL of anhydrous DMF to obtain solution B, 2.5 mL of solution B was added dropwise to 7.5 mL of solution A, stirred for 40 min, cooled to 0°C, 0.07 g of sodium borohydride was added, reacted at room temperature for 90 min, extracted with anhydrous diethyl ether, filtered, and dried to obtain a perfluorocystine derivative;

[0037] Step B2: 0.93 g of the perfluorocystine derivative was dissolved in 20 mL of anhydrous DMF, then 0.44 g of 3-aminopropyl triethoxysilane, 0.38 g of EDCl [1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride], and 0.16 g of pyridine were added, and the mixture was reacted at 25°C for 9 h, filtered, washed, and dried to obtain a modified silane coupling agent.

[0038] Preparation Example 3

[0039] The preparation method of the modified silane coupling agent of the present preparation example is as follows:

[0040] 0.24 g of cystine was dissolved in 30 mL of anhydrous DMF, then 0.44 g of 3-aminopropyl triethoxysilane, 0.38 g of EDCl [1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride], and 0.16 g of pyridine were added, and the mixture was reacted at 25°C for 8 h, filtered, washed, and dried to obtain a modified silane coupling agent.

[0041] Preparation Example 4

[0042] The present preparation example uses 3-aminopropyl triethoxysilane.

[0043] Example 1

[0044] The present example provides a preparation method of a privacy film, comprising the following steps:

[0045] Step A1: The modified glue was embossed to form long strip-shaped grooves, and the connection layer was obtained by UV curing for 2 s, the thickness of the connection layer was 61.3 µm, the width of the long strip-shaped grooves was 5.4 µm, the depth of the long strip-shaped grooves was 60.2 µm, the distance between the bottom of the long strip-shaped grooves and the bottom wall of the connection layer was 1.1 µm, and the distance between adjacent long strip-shaped grooves was 32.7 µm;

[0046] Step A2: 98 parts of UV color paste were added to 2 parts of modified glue, and the black glue was obtained by stirring and mixing uniformly, the black glue was filled into the long strip-shaped grooves, and the connection layer was compounded on the surface of the PET layer, and then UV curing was performed again for 2 s to obtain a privacy film.

[0047] The preparation method of the modified glue is as follows:

[0048] Dissolve 2 parts of UV400, 1 part of non-toxic phosphite 1500, 2 parts of the modified silane coupling agent prepared in Preparation Example 1, 5 parts of a photoinitiator composed of 80 wt% of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone and 20 wt% of 2-isopropylthioxanthone into 40 parts of trimethylolpropane triacrylate at 50-80°C, add 25 parts of an epoxy acrylate resin and 20 parts of a UV molding resin, stir uniformly, then add 1 part of BYK1790 defoaming agent and 1 part of BYK361N leveling agent, vacuum degassing at 20°C and -0.1 MPa to obtain a modified glue.

[0049] Example 2

[0050] The present embodiment provides a preparation method of a privacy film, comprising the following steps:

[0051] Step A1: The modified glue is embossed to form long strip-shaped grooves, and a connecting layer is obtained by UV curing for 5s, the thickness of the connecting layer is 79.4µm, the width of the long strip-shaped grooves is 7.3µm, the depth of the long strip-shaped grooves is 70.3µm, the distance between the groove bottom of the long strip-shaped grooves and the bottom wall of the connecting layer is 9.1µm, and the distance between adjacent long strip-shaped grooves is 39.5µm;

[0052] Step A2: 96 parts of UV color paste are added to the modified glue, stirred and mixed uniformly to obtain black glue, the black glue is filled into the long strip-shaped grooves, and the connecting layer is compounded on the surface of the PP layer, and UV curing is performed again for 5s to obtain a privacy film.

[0053] The preparation method of the modified glue is:

[0054] Dissolve 2 parts of UV400, 1 part of non-toxic phosphite 1500, 2 parts of the modified silane coupling agent prepared in Preparation Example 1, 5 parts of a photoinitiator composed of 80 wt% of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone and 20 wt% of 2-isopropylthioxanthone into 40 parts of trimethylolpropane triacrylate at 50-80°C, add 25 parts of an epoxy acrylate resin and 20 parts of a UV molding resin, stir uniformly, then add 1 part of BYK1790 defoaming agent and 1 part of BYK361N leveling agent, vacuum degassing at 20°C and -0.1 MPa to obtain a modified glue.

[0055] Example 3

[0056] The present embodiment provides a preparation method of a privacy film, comprising the following steps:

[0057] Step A1: The modified glue was embossed and formed into long strip-shaped grooves, and a connecting layer was obtained by UV curing for 4s, the thickness of the connecting layer was 72.1 µm, the width of the long strip-shaped groove was 6.3 µm, the depth of the long strip-shaped groove was 64.9 µm, the distance between the groove bottom of the long strip-shaped groove and the bottom wall of the connecting layer was 7.2 µm, and the distance between adjacent long strip-shaped grooves was 34.1 µm;

[0058] Step A2: 94 parts of UV color paste were added to 6 parts of modified glue, and the black glue was obtained by stirring and mixing uniformly. The black glue was filled into the long strip-shaped grooves, and the connecting layer was compounded on the surface of the PE layer. UV curing was performed again for 4s to obtain the anti-peep film.

[0059] The preparation method of the modified glue is as follows:

[0060] 1 part of UV400, 1 part of non-toxic phosphite 1500, 4 parts of the modified silane coupling agent prepared in Preparation Example 2, 3 parts of a photoinitiator composed of 80 wt% of 2-methyl-1-(4-methylthio phenyl)-2-morpholine-1-propanone and 20 wt% of 2-isopropyl thioxanthone were dissolved into 40 parts of UV monomer (the UV monomer was composed of trimethylolpropane triacrylate and isobornyl acrylate at a mass ratio of 1:1) at 50-80°C, 25 parts of epoxy acrylate resin and 20 parts of UV forming resin were added, and after stirring uniformly, 0.5 parts of BYK1790 defoaming agent and 0.5 parts of BYK361N leveling agent were added. Vacuum degassing was carried out under the conditions of 35°C and -0.07 MPa to obtain the modified glue.

[0061] Comparative Example 1

[0062] Comparative Example 1 and Example 1 are different in that the modified silane coupling agent in Example 1 is replaced by the substance prepared in Preparation Example 3, and the remaining raw materials and steps are the same as those in Example 1.

[0063] Comparative Example 2

[0064] Comparative Example 1 and Example 1 are different in that the modified silane coupling agent in Example 1 is replaced by the substance of Preparation Example 4, and the remaining raw materials and steps are the same as those in Example 1.

[0065] Comparative Example 3

[0066] Comparative Example 1 and Example 1 are different in that no modified silane coupling agent is added, and the remaining raw materials and steps are the same as those in Example 1.

[0067] Comparative Example 4

[0068] Comparative Example 1 and Example 1 are different in that “98 parts of UV color paste are added to 2 parts of modified glue” in Example 1 is replaced by “98 parts of UV color paste are added to 1.5 parts of modified glue”, and the remaining raw materials and steps are the same as those in Example 1.

[0069] Comparative Example 5

[0070] Comparative Example 1 is compared with Example 3, the difference is that the “94 parts of UV color paste is added to 6 parts of modified glue” in Example 3 is replaced by “94 parts of UV color paste is added to 6.5 parts of modified glue”, and the rest of the raw materials and steps are the same as Example 3.

[0071] The performance tests of the anti-peep films prepared in Example 1-Example 3 and Comparative Example 1-Comparative Example 5 are carried out, and the test items are as follows, and the test results are shown in Table 1:

[0072] I. Anti-fingerprint detection: artificial sweat containing sodium chloride, urea, lactic acid and other components is dropped on the anti-peep films prepared in Example 1-Example 3 and Comparative Example 1-Comparative Example 5 to see if there is a mark left.

[0073] II. Hydrophobicity: characterized by water contact angle, tested with 4µL deionized water droplets.

[0074] III. Light transmittance: test the average transmittance in the wavelength range of 300-800nm.

[0075] IV. Self-repairing performance: draw a 200nm long, 20μm wide and 30μm deep scratch on the surface of the sample, and keep it at 50℃ for 24h. Measure the light transmittance before and after the scratch test, and the ratio represents the self-repairing property, which is recorded as the self-repairing rate.

[0076] V. Bending resistance: the anti-peep film product is wound around a 5mm shaft rod and bent 180°, and whether the bending part is broken is observed.

[0077] Table 1

[0078]

[0079] Note: “ / ” in Table 1 represents that the performance does not have the performance.

[0080] As can be seen from Table 1, the anti-peep films prepared in Example 1-Example 3 have excellent anti-fingerprint performance, water resistance, light transmittance, self-repairing property and bending resistance.

[0081] ​The fluorinated alkyl chain in Comparative Example 1 does not contain a fluorinated alkyl chain and an imine bond, and has a lower surface energy. This low surface energy property forms a thin film on the surface of the privacy film that is difficult to be infiltrated by water, oil and other liquids. This thin film not only has excellent water resistance, but also effectively prevents the adhesion of fingerprints, stains and other substances, thereby improving the fingerprint resistance and stain resistance of the privacy film. In addition, the fluorinated alkyl chain has a hydrophobic long chain, which can also improve the hydrophobicity of the privacy film. The film with high hydrophobicity has more excellent anti-fingerprint ability. The imine bond has self-repairing ability, so the anti-fingerprint performance, water resistance and self-repairing performance of Comparative Example 1 are all lower than those of Example 1.

[0082] In Comparative Example 2, a common silane coupling agent, 3-aminopropyl triethoxysilane, is used. It does not have a self-repairing group and a fluorinated alkyl chain, and its comprehensive performance is reduced.

[0083] In Comparative Example 3, no silane coupling agent is added. Since the siloxane group can improve the fingerprint resistance, stain resistance and light transmittance of the privacy film, the comprehensive performance of this comparative example is weak.

[0084] In Comparative Example 4 and Comparative Example 5, the amount of modified glue added is too little and too much, respectively. Compared with Example 1 and Example 3, the performance is reduced, indicating that the amount of modified glue added in the present application is the optimal amount.

[0085] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0086] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for producing a privacy film, characterized by, The method comprises the following steps: Step A1: the modified glue is embossed and formed into a long slot, and is cured by UV for 2-5 seconds to obtain a connecting layer, the raw material of the modified glue comprises a modified silane coupling agent, the modified silane coupling agent comprises a fluoroalkyl chain, an amide group, a disulfide bond and an imine bond; Step A2: the UV color paste is added into the modified glue, and is stirred and mixed uniformly to obtain black glue, the black glue is filled into the long slot, and the connecting layer is combined with the surface of the PET layer, and is cured by UV again for 2-5 seconds to obtain the anti-peeping film; The preparation method of the modified silane coupling agent is as follows: Step B1: cystine is added into a 2 mol / L sodium hydroxide aqueous solution to obtain solution A; 1H, 1H, 2H-perfluorooctyl aldehyde is dissolved in anhydrous DMF to obtain solution B, solution B is added dropwise into solution A, and after stirring for 20-40 minutes, cooling is performed to 0-4 DEG C, 0.07 g of sodium borohydride is added, reaction is performed at room temperature for 90 minutes, extraction is performed, filtration is performed, and drying is performed to obtain a perfluorocystine derivative; Step B2: the perfluorocystine derivative is dissolved in anhydrous DMF, and then 3-aminopropyl triethoxysilane, EDCl [1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride] and pyridine are added, reaction is performed at 25 DEG C for 8-9 hours, filtration is performed, washing is performed, and drying is performed to obtain the modified silane coupling agent.

2. The method of claim 1, wherein the method further comprises: The mass ratio of the UV color paste and the modified glue is (94-98):(2-6).

3. The method of claim 1, wherein the method further comprises: The preparation method of the modified glue is as follows: The absorbent, the oxidant, the modified silane coupling agent and the photoinitiator are dissolved into the UV monomer at 50-80 DEG C, the epoxy acrylate resin and the UV forming resin are added, stirring is uniformly performed, then the defoaming agent and the leveling agent are added, and vacuum degassing is performed to obtain the modified glue.

4. The method of claim 3, wherein the method further comprises, The weight ratio of the absorbent, the oxidant, the modified silane coupling agent, the photoinitiator, the UV monomer, the epoxy acrylate resin, the UV forming resin, the defoaming agent and the leveling agent is (1-2):1:(2-4):(3-5):40:25:20:(0.5-1):(0.5-1).

5. The method of claim 3, wherein the method further comprises: The absorbent is UV400; the oxidant is non-toxic phosphite 1500; the photoinitiator is composed of 80 wt% of 2-methyl-1-(4-methylthio phenyl)-2-morpholine-1-propanone and 20 wt% of 2-isopropyl thioxanthone; the defoaming agent is BYK1790 defoaming agent; and the leveling agent is BYK361N leveling agent.

6. The method of claim 3, wherein the method further comprises: The UV monomer comprises one or more of trimethylolpropane triacrylate, hexanediol diacrylate, isobornyl acrylate and 2-phenoxyethyl acrylate.

7. The method of claim 3, wherein the method further comprises: The vacuum degassing condition is that the temperature is 20-50 DEG C and the pressure is-0.1 MPa to-0.05 MPa.

8. The method of claim 1, wherein the privacy film is prepared by the steps of: In step B1, the dosage ratio of cystine, the sodium hydroxide aqueous solution, 1H, 1H, 2H-perfluorooctyl aldehyde, anhydrous ethanol and sodium borohydride is 0.79 g:2.5 mL:2.39 g:7.5 mL:0.07 g; and in step B2, the dosage ratio of the perfluorocystine derivative, anhydrous DMF, 3-aminopropyl triethoxysilane, EDCl and pyridine is 0.93 g:20-30 mL:0.44 g:0.38 g:0.16 g.

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