CN112680139A - Acrylic foaming damping foam and preparation method thereof - Google Patents
Acrylic foaming damping foam and preparation method thereof Download PDFInfo
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Abstract
The invention discloses acrylic foaming damping foam which is applied to an OLED module and comprises a release film layer and an acrylic foam layer, wherein the release film layer and the acrylic foam layer are mutually overlapped, the acrylic foam layer is formed by coating and drying an acrylic foam coating liquid, and the acrylic foam coating liquid is prepared from the following components in parts by weight: acrylic polymer, curing agent, foaming microspheres, inorganic filler, dispersant, inorganic pigment and organic solvent. The acrylic foam adhesive tape prepared by the invention can absorb impact force, has excellent impact absorbability, can be widely used around liquid crystal as a buffer material by utilizing the characteristic, can not cause water decomposition due to excessive humidity, and has excellent durability.
Description
Technical Field
The invention belongs to the technical field of preparation of acrylic foam cotton materials, and particularly relates to acrylic foaming shock-absorbing foam cotton and a preparation method thereof.
Background
Due to the numerous advantages of OLED, OLED technology has a wider application range than LCD technology, and can be extended to the fields of electronic products, commerce, traffic, industrial control and medical use. With the development of science and technology, people cannot live with electronic display equipment such as mobile phones, computers and the like; the electronic devices are easy to collide and fall off in the using process, so that a layer of buffer material foam (such as PE foam, EVA foam and PU foam) is required to be adhered to the lower portion of the OLED frame of the screen of the electronic devices to absorb the impact of the outside on the electronic devices. Traditional cotton material of bubble divide into PU bubble cotton, prevent that static bubble is cotton, electrically conducts the bubble cotton, EPE, prevent static EPE, PORON, CR, EVA, bridging PE, SBR, EPDM etc.. But the traditional foam material has the defects of no viscosity, needs post-processing composite adhesive, has thick thickness, poor flexibility and no bending resistance, and is difficult to be applied to ultrathin flexible liquid crystal display products.
Disclosure of Invention
The invention aims to provide acrylic foaming shock-absorbing foam and a preparation method thereof, and discloses a method for applying an acrylic shock-absorbing foam material used by an OLED module and application thereof. Has the characteristics of convenient use, free bending, ultrathin volume, reliable performance and the like.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an inferior gram force foaming shock attenuation bubble is cotton, inferior gram force foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete and the cotton layer of inferior gram force bubble, from type rete and the cotton layer of inferior gram force bubble coincide each other and be in the same place, the cotton layer of inferior gram force bubble is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the technical scheme of further improvement in the technical scheme is as follows:
1. in the above scheme, from type rete including the substrate layer with be located the antiseized layer of substrate layer both sides.
2. In the above scheme, the substrate layer is made by the insulating class material that blocks water, for one of single-layer type film, compound polyester type film, coating type polyester film or polymer coextrusion resin film, antiseized layer is the antiseized processing layer of organosilicon, improves product coating production carrier film, makes things convenient for follow-up cross cutting processing. The antiseized layer is the antiseized processing layer of organosilicon, plays and prevents the adhesion effect, and the cotton monomer of bubble can conveniently be taken off, easily follow-up processing laminating operation.
3. In the above scheme, the acrylic polymer is a solvent-based polymer, and is selected from one or at least two of acrylic polymers modified by polyester resin, polyurethane resin or epoxy resin. The main body resin is made of a high-elasticity polymer material, and compared with a common polymer material, the high-elasticity polymer material has high buffering new energy and shock absorption.
4. In the above scheme, the curing agent is one or a mixture of at least two of an epoxy curing agent, an isocyanate curing agent, an imidazole curing agent, a hydrazide curing agent and an amine curing agent. Curing agents, also known as hardeners, curing agents or setting agents, are a class of substances or mixtures that enhance or control the curing reaction. The resin curing is carried out by adding a curing (crosslinking) agent to a thermosetting resin through chemical reactions such as condensation, ring closure, addition or catalysis to cause irreversible change of the thermosetting resin. Provides the crosslinking degree of the coating, provides temperature resistance, heat resistance and water resistance, and is not easy to decompose at high temperature.
5. In the scheme, the foaming microspheres are thermoplastic hollow polymer microspheres, the particle size of the microspheres is 5-50 nm, the microspheres are polymer particles with a core-shell structure, and the inner core of the foaming microspheres is low-boiling-point polymer particles serving as a foaming agentThe shell layer of the liquid hydrocarbon is a thermoplastic polymer copolymerized by acrylate monomers, and the expanded microspheres have good thermoplasticity and rebound resilience, so that the expanded microspheres are usually added into a high polymer to prepare a foamed product, the elasticity and the rebound resilience of the product can be further improved after the microspheres are added, the good rebound resilience is realized, and the expansion rate of an adhesion gap can be better improved compared with that of the common microspheres. Stable at normal temperature, after heating and expansion, the foaming temperature is between 80 and 160 ℃, the volume can be enlarged to dozens or even hundreds of times of the original volume, and the density is 400 to 1200kg/m before expansion3Reduced to 20-30 kg/m3The foaming temperature and time are adjusted to control the foaming size and density, so that different effects are produced.
6. In the scheme, the inorganic filler is one or a mixture of at least two of mica powder, aluminum oxide, silicon dioxide, calcium carbonate, diamond powder and carbon fiber; the addition of proper powder filler can achieve the effects of increasing quantity and reducing cost, improve or enhance the physical mechanical property, wear resistance, thermal property and aging resistance of plastic products, and overcome the defects of low temperature resistance, low rigidity, easy expansibility, easy creep property and the like of plastics. Therefore, the filler has both an increasing effect and a modifying effect; some fillers are active and can also act as reinforcement.
7. In the scheme, the dispersing agent is one or a mixture of at least two of fatty acids, paraffin, metal soaps, low molecular wax and HPMA compounds; the dispersant is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule. The amphiphilic agent is capable of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquids, and also preventing settling and agglomeration of the particles to form stable suspensions.
8. In the scheme, the inorganic pigment is one or a mixture of at least two of carbon black, titanium dioxide, iron oxide red and cobalt blue compounds; the pigment is a colored fine particle powdery substance, is generally insoluble in water, and can be dispersed in various media such as oil, solvent and resin. It has hiding power, tinting strength, is relatively light stable, and is commonly used in formulating paints, inks, and pigmented plastics and rubbers, and thus may also be referred to as a colorant.
9. In the above scheme, the organic solvent is one or a mixture of at least two of butyl acetate, ethyl acetate, toluene and xylene.
The invention adopts another technical scheme that: a preparation method of acrylic foaming shock absorption foam comprises the following steps:
s1, adding an organic solvent, foamed microspheres, an inorganic filler, a dispersing agent and an inorganic pigment into a reaction kettle, and mixing, dispersing and stirring at a high speed;
s2, adding acrylic polymer resin, fully grinding and dispersing, adding a curing agent, strongly stirring uniformly to obtain finished glue, filtering the finished glue by using a 100-mesh filter screen, standing and defoaming for a period of time to obtain acrylic foam mixed liquid;
and S3, coating the acrylic acid foam mixed solution on the release film layer, and heating in an oven to obtain the acrylic foam finished product.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the above scheme, the oven temperature in S2 is as follows: the temperature of the first section of drying oven is 60-70 ℃, the temperature of the second section of drying oven is 60-70 ℃, the temperature of the third section of drying oven is 70-80 ℃, the temperature of the fourth section of drying oven is 70-80 ℃, the temperature of the fifth section of drying oven is 80-90 ℃, the temperature of the sixth section of drying oven is 120-130 ℃, and the temperature of the seventh section of drying oven is 110-120 ℃.
2. In the scheme, the coating thickness of the acrylic acid foam mixed liquid in the S3 is 50-200 mu m.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the acrylic foam shock absorption foam and the preparation method thereof have the advantages that the prepared acrylic foam adhesive tape has excellent attaching performance to convex and concave positions of an attachment body due to softness, can show excellent adhesion to the attachment body even though the attachment body is thin and narrow in width, can be temporarily fixed on a smooth surface and can be repeatedly attached due to the viscosity of the acrylic foam body, can absorb impact force and has excellent impact absorption performance, and the acrylic foam adhesive tape can be widely used around liquid crystals as a buffer material due to the characteristic, does not cause water decomposition due to excessive humidity and has excellent durability.
The acrylic damping foam material provided by the invention is simple in use method, has higher construction efficiency as the acrylic damping foam material applied to the OLED module, is environment-friendly and free of wastes, has a series of characteristics of convenience in use, free bending, ultrathin volume, reliable performance and the like, and is low in cost, excellent in performance and long in service life.
Drawings
Fig. 1 is a schematic structural view of the acrylic foaming shock-absorbing foam of the present invention.
In the figure: 1. a release film layer; 2. acrylic foam layer.
Detailed Description
The invention is further described below with reference to the following examples:
example 1: the utility model provides an acrylic foaming shock attenuation bubble is cotton, acrylic foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
s1, adding 30 parts of ethyl acetate organic solvent and 1.5 parts of fatty acid dispersant, mixing and stirring uniformly, adding 2 parts of foaming microspheres, 2 parts of inorganic filler silicon dioxide and 0.5 part of inorganic pigment carbon black in sequence, and mixing, dispersing and stirring at high speed;
s2, adding 100 parts of solvent type acrylic polymer resin after the step S1, fully grinding and dispersing, then adding 0.4 part of epoxy type curing agent, strongly stirring uniformly, filtering the finished glue by using a 100-mesh filter screen, standing and defoaming for a period of time;
s3, the acrylic acid foam mixed solution obtained in the step S2 is coated on the release film and heated to prepare the acrylic acid foam adhesive tape. The heating step is completed in an oven, the temperature of the first section of oven is controlled to be 60 ℃, the temperature of the second section of oven is controlled to be 60 ℃, the temperature of the third section of oven is controlled to be 70 ℃, the temperature of the fourth section of oven is controlled to be 70 ℃, the temperature of the fifth section of oven is controlled to be 110 ℃, the temperature of the sixth section of oven is controlled to be 120 ℃, and the temperature of the seventh section of oven is controlled to be 80 ℃. The thickness of the prepared acrylic foam product is 120 mu m.
Example 2
The utility model provides an acrylic foaming shock attenuation bubble is cotton, acrylic foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
s1, adding 40 parts of butyl acetate organic solvent and 2.2 parts of low molecular wax dispersant, mixing and stirring uniformly, adding 2 parts of foaming microspheres, 1 part of inorganic filler silicon dioxide and 0.2 part of inorganic pigment carbon black in sequence, and mixing, dispersing and stirring at high speed;
s2, adding 100 parts of solvent type acrylic polymer resin after the step S1, fully grinding and dispersing, then adding 0.2 part of isocyanate curing agent, strongly stirring uniformly, filtering the finished glue by a 100-mesh filter screen, and standing and defoaming for a period of time;
s3, the acrylic acid foam mixed solution obtained in the step S2 is coated on the release film and heated to prepare the acrylic acid foam adhesive tape. The heating steps are completed in the drying oven, the temperature of the first section of drying oven is controlled to be 65 ℃, the temperature of the second section of drying oven is controlled to be 65 ℃, the temperature of the third section of drying oven is controlled to be 75 ℃, the temperature of the fourth section of drying oven is controlled to be 70 ℃, the temperature of the fifth section of drying oven is controlled to be 120 ℃, the temperature of the sixth section of drying oven is controlled to be 110 ℃, and the temperature of the seventh section of drying oven is controlled to be 80 ℃. The thickness of the prepared acrylic foam product is 120 mu m.
Example 3
The utility model provides an acrylic foaming shock attenuation bubble is cotton, acrylic foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
s1, adding 40 parts of ethyl acetate organic solvent and 1.8 parts of metal soap dispersant, mixing and stirring uniformly, adding 2 parts of foaming microspheres, 3 parts of inorganic filler calcium carbonate and 1.5 parts of inorganic pigment titanium dioxide in sequence, and mixing, dispersing and stirring at high speed;
s2, adding 100 parts of solvent type acrylic polymer resin after the step S1, fully grinding and dispersing, then adding 0.8 part of imidazole curing agent type curing agent, strongly stirring uniformly, filtering the finished glue by using a 100-mesh filter screen, and standing and defoaming for a period of time;
s3, the acrylic acid foam mixed solution obtained in the step S2 is coated on the release film and heated to prepare the acrylic acid foam adhesive tape. The heating step is completed in an oven, the temperature of the first section of oven is controlled to be 70 ℃, the temperature of the second section of oven is controlled to be 70 ℃, the temperature of the third section of oven is controlled to be 80 ℃, the temperature of the fourth section of oven is controlled to be 75 ℃, the temperature of the fifth section of oven is controlled to be 115 ℃, the temperature of the sixth section of oven is controlled to be 115 ℃, and the temperature of the seventh section of oven is controlled to be 85 ℃. The thickness of the prepared acrylic foam product is 120 mu m.
Example 4
The utility model provides an acrylic foaming shock attenuation bubble is cotton, acrylic foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
s1, adding 60 parts of toluene organic solvent and 1.5 parts of paraffin dispersant, mixing and stirring uniformly, adding 2.5 parts of foaming microspheres, 2 parts of inorganic filler mica powder and 1.2 parts of inorganic pigment cobalt blue in sequence, and mixing, dispersing and stirring at high speed;
s2, adding 100 parts of solvent type acrylic polymer resin after the step S1, fully grinding and dispersing, then adding 0.4 part of hydrazide type curing agent, strongly stirring uniformly, filtering the finished glue by using a 100-mesh filter screen, and standing and defoaming for a period of time;
s3, the acrylic acid foam mixed solution obtained in the step S2 is coated on the release film and heated to prepare the acrylic acid foam adhesive tape. The heating steps are completed in the drying oven, the temperature of the first section of drying oven is controlled to be 65 ℃, the temperature of the second section of drying oven is controlled to be 60 ℃, the temperature of the third section of drying oven is controlled to be 75 ℃, the temperature of the fourth section of drying oven is controlled to be 80 ℃, the temperature of the fifth section of drying oven is controlled to be 115 ℃, the temperature of the sixth section of drying oven is controlled to be 110 ℃, and the temperature of the seventh section of drying oven is controlled to be 90 ℃. The thickness of the prepared acrylic foam product is 120 mu m.
Example 5
The utility model provides an acrylic foaming shock attenuation bubble is cotton, acrylic foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
s1, adding 40 parts of organic solvent ethyl acetate and 2.4 parts of fatty acid dispersant, mixing and stirring uniformly, adding 1.5 parts of foaming microspheres, 2 parts of inorganic filler silicon dioxide and 0.6 part of inorganic pigment iron oxide red in sequence, and mixing, dispersing and stirring at high speed;
s2, adding 100 parts of solvent type acrylic polymer resin after the step S1, fully grinding and dispersing, then adding 0.6 part of epoxy type curing agent, strongly stirring uniformly, filtering the finished glue by using a 100-mesh filter screen, standing and defoaming for a period of time;
s3, the acrylic acid foam mixed solution obtained in the step S2 is coated on the release film and heated to prepare the acrylic acid foam adhesive tape. The heating step is completed in an oven, the temperature of the first section of oven is controlled to be 70 ℃, the temperature of the second section of oven is controlled to be 70 ℃, the temperature of the third section of oven is controlled to be 80 ℃, the temperature of the fourth section of oven is controlled to be 80 ℃, the temperature of the fifth section of oven is controlled to be 115 ℃, the temperature of the sixth section of oven is controlled to be 115 ℃, and the temperature of the seventh section of oven is controlled to be 80 ℃. The thickness of the prepared acrylic foam product is 120 mu m.
Example 6
The utility model provides an acrylic foaming shock attenuation bubble is cotton, acrylic foaming shock attenuation bubble is cotton is applied to on the OLED module, include from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by the cotton coating liquid coating of acrylic acid bubble and is formed, the cotton coating liquid of acrylic acid bubble adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
s1, adding 50 parts of ethyl acetate as an ethyl acetate organic solvent and 1.8 parts of a low molecular wax dispersant, mixing and stirring uniformly, adding 2.0 parts of foaming microspheres, 2.0 parts of inorganic filler carbon fibers and 0.5 part of inorganic pigment carbon black in sequence, and mixing, dispersing and stirring at a high speed;
s2, adding 100 parts of solvent type acrylic polymer resin after the step S1, fully grinding and dispersing, then adding 0.6 part of epoxy type curing agent, strongly stirring uniformly, filtering the finished glue by using a 100-mesh filter screen, standing and defoaming for a period of time;
s3, the acrylic acid foam mixed solution obtained in the step S2 is coated on the release film and heated to prepare the acrylic acid foam adhesive tape. The heating steps are completed in the drying oven, the temperature of the first section of drying oven is controlled to be 65 ℃, the temperature of the second section of drying oven is controlled to be 65 ℃, the temperature of the third section of drying oven is controlled to be 75 ℃, the temperature of the fourth section of drying oven is controlled to be 75 ℃, the temperature of the fifth section of drying oven is controlled to be 115 ℃, the temperature of the sixth section of drying oven is controlled to be 115 ℃, and the temperature of the seventh section of drying oven is controlled to be 85 ℃. The thickness of the prepared acrylic foam product is 120 mu m.
Comparative example 1
The utility model provides an acrylic foaming shock attenuation bubble is cotton, includes from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by acrylic acid bubble cotton coating liquid coating and is formed, acrylic acid bubble cotton coating liquid adopts the component of following parts by weight to make:
preparing the acrylic acid foam adhesive tape:
(1) mixing and uniformly stirring raw materials of acrylic acid polymer, isocyanate curing agent, foaming microspheres, nonionic surfactant, carbon black and ethyl acetate solvent in the acrylic acid foam coating liquid to obtain the acrylic acid foam coating liquid;
(2) coating the acrylic acid foam coating liquid on a PET release film through a coating machine;
(3) continuously heating and drying the product obtained in the step (2) through a coating machine containing 7 sections of drying ovens to form the acrylic foam adhesive tape with the release film, wherein the temperature of the first section of drying oven is controlled to be 60-70 ℃, the temperature of the second section of drying oven is controlled to be 90-100 ℃, the temperature of the third section of drying oven is controlled to be 90-100 ℃, the temperature of the fourth section of drying oven is controlled to be 100-110 ℃, the temperature of the fifth section of drying oven is controlled to be 100-110 ℃, the temperature of the sixth section of drying oven is controlled to be 90-100 ℃, and the temperature of the seventh section of drying oven is controlled to be 60-70 ℃.
Comparative example 2
The utility model provides an acrylic foaming shock attenuation bubble is cotton, includes from type rete 1 and acrylic bubble cotton layer 2, from type rete 1 and acrylic bubble cotton layer 2 each other the coincide together, acrylic bubble cotton layer 2 is dried by acrylic acid bubble cotton coating liquid coating and is formed, acrylic acid bubble cotton coating liquid adopts the component of following parts by weight to make:
the preparation method of the foam material comprises the following steps:
(1) mixing and uniformly stirring raw materials of acrylic acid polymer, pyridine curing agent, foaming microspheres, silicon dioxide, fatty acid dispersing agent, carbon black and ethyl acetate solvent in the acrylic acid foam coating liquid to obtain the acrylic acid foam coating liquid;
(2) coating the acrylic acid foam coating liquid on a PET release film through a coating machine;
(3) continuously heating and drying the product obtained in the step (2) through a coating machine containing 7 sections of drying ovens to form the acrylic foam adhesive tape with the release film, wherein the temperature of the first section of drying oven is controlled to be 60-70 ℃, the temperature of the second section of drying oven is controlled to be 90-100 ℃, the temperature of the third section of drying oven is controlled to be 90-100 ℃, the temperature of the fourth section of drying oven is controlled to be 100-110 ℃, the temperature of the fifth section of drying oven is controlled to be 100-110 ℃, the temperature of the sixth section of drying oven is controlled to be 90-100 ℃, and the temperature of the seventh section of drying oven is controlled to be 60-70 ℃.
The foam tapes prepared in the above examples 1 to 6 and comparative examples 1 to 2 were subjected to the performance test, which specifically includes the following steps:
1. test method
1.1 thickness measurement
(1) When sampling from the film roll, at least the outermost three turns of the film are removed
(2) Placing the well-taken sample in a standard test environment, and if the temperature balance requirement is only met, placing the sample for at least 3H; if the temperature and humidity balance is required, at least 24H is placed.
(3) The sample is placed between the upper and lower head planes of the measuring head of the thickness gauge, the adhesive tape faces upwards, the upper measuring head is slowly lowered during the test and finally covered on the surface of the adhesive tape, and the distance between the edge of the upper measuring head and the edge of the adhesive tape is 6mm as long as possible. Within 1 second after lowering the upper measuring head, the reading of the thickness gauge micrometer is recorded, in mm, to the nearest 0.001 mm.
(4) Measuring 9 points on each single sheet, recording data and calculating an average value; wherein the distance between every 2 points is not less than 50 mm.
(5) When the double-sided tape is measured, the gasket is used, the steps shown in (3) to (4) are adopted, the thickness of a sample with the gasket is measured, a mark is made at the measured position of the gasket, the gasket is uncovered, the position of the mark made on the gasket is measured, the thickness of the gasket is measured through the steps from (3) to (4), and the arithmetic mean value of two groups of readings is respectively obtained.
1.2 Density test
(1) When sampling from the film roll, at least the outermost three circles of the film are removed;
(2) placing the well-taken sample in a standard test environment, and if the temperature balance requirement is only met, placing the sample for at least 3H; if the temperature and humidity balance is required, at least 24H is placed.
(3) The test specimens were cut at room temperature to 10cm x 10cm size samples, the weight of the monomer foam was measured as m, and the thickness was measured as h under the same test conditions as above.
(4) Density calculation formula:
ρ＝m/h*100
1.3 tensile Strength and elongation at Break test:
(1) taking a roll-shaped or sheet-shaped sample, cutting the product into 3-5 strips with the size of 10mm multiplied by 150mm, and standing for more than 2H under the test condition.
(2) Equipment: an Shimadzu universal mechanical tension tester. And clamping one end of the sample on a clamp at the lower end of the tensile machine by using a universal tensile machine, stretching at the speed of 500mm/min, and testing the mechanical property.
(3) And recording test data, and taking an average value.
1.4 compressive Strength test
(1) Taking a roll-shaped or sheet-shaped sample, cutting the product into strips with the size of 50mm multiplied by 200mm, and standing for more than 2H under the test condition;
(2) superposing the samples layer by layer to prepare samples with the size of 25mm by 10mm, and standing for 24 hours at constant temperature in a laboratory after the completion;
(3) and (3) testing the sample by using a universal mechanical press, wherein the compression speed is 5mm/min, and performing compression test on the sample.
(4) The compression strength data values corresponding to 25% and 50% compression ratios, respectively, are taken.
1.5 falling ball impact test
(1) Taking a roll-shaped or sheet-shaped sample, cutting the product into strips with the size of 100mm multiplied by 100mm, and standing for more than 2H under the test condition;
(2) mobile phone cover glass, sample specification: 60mm 120mm 0.7mm, adhering acrylic foam material;
(3) the weight of the stainless steel ball is 55g, the diameter of the stainless steel ball is 25mm, the impact test is carried out on the mobile phone glass cover plate attached to the foam at the height of 500mm, and whether a sample is intact is observed.
2. Test results
Table 1 results of performance testing
The acrylic foam adhesive tape of the invention needs to meet the following performance requirements when in application:
density/(g/cm 3): 0.6-0.8;
tensile strength/Mpa: 0.7-1.5;
elongation at break/%: 300-700;
25% compressive strength/Mpa: not less than 0.2;
50% compressive strength/MPa: not less than 0.7;
to summarize: as can be seen from the data in Table 1, the acrylic foam adhesive tape has adjustable density, matched colors, good impact absorption performance and buffering and damping performance, and can well protect application products. By utilizing the characteristics, the buffer material is widely used around liquid crystal, and the detection results of the embodiments 1-6 are all in the range of the test requirements, so that the use requirements are met;
the foam tapes prepared in comparative examples 1 and 2 have elongation at break and compressive strength lower than the range required values, and have poor buffering performance, and the falling ball experiment causes glass breakage.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides an inferior gram force foaming shock attenuation bubble is cotton which characterized in that: on inferior gram force foaming shock attenuation bubble is applied to the OLED module, include from type rete (1) and acrylic bubble cotton layer (2), overlap together each other from type rete (1) and acrylic bubble cotton layer (2), acrylic bubble cotton layer (2) are dried by acrylic acid bubble cotton coating liquid coating and are formed, acrylic acid bubble cotton coating liquid adopts the component of following parts by weight to make:
2. the acrylic foaming shock-absorbing foam according to claim 1, wherein: the release film layer (1) comprises a base material layer and anti-sticking layers positioned on two sides of the base material layer.
3. The acrylic foaming shock absorption foam according to claim 2, which is characterized in that: the substrate layer is one of a monolayer film, a composite polyester film, a coating type polyester film or a high-molecular co-extrusion resin film, and the anti-sticking layer is an organic silicon anti-sticking treatment layer.
4. The acrylic foaming shock-absorbing foam according to claim 1, wherein: the acrylic polymer is one or at least two of polyester resin, polyurethane resin or epoxy resin modified acrylic polymer.
5. The acrylic foaming shock-absorbing foam according to claim 1, wherein: the curing agent is one or a mixture of at least two of epoxy curing agent, isocyanate curing agent, imidazole curing agent, hydrazide curing agent and amine curing agent.
6. The acrylic foaming shock-absorbing foam according to claim 1, wherein: the foaming microspheres are thermoplastic hollow polymer microspheres, the particle size of the microspheres is 5-50 nm, the foaming microspheres are polymer particles with a core-shell structure, the core of the foaming microspheres is low-boiling-point liquid hydrocarbon serving as a foaming agent, and the shell layer is a thermoplastic polymer copolymerized by acrylate monomers.
7. The acrylic foaming shock-absorbing foam according to claim 1, wherein: the inorganic filler is one or a mixture of at least two of mica powder, aluminum oxide, silicon dioxide, calcium carbonate, diamond powder and carbon fiber;
the dispersing agent is one or a mixture of at least two of fatty acids, paraffin, metal soaps, low molecular wax and HPMA compounds;
the inorganic pigment is one or a mixture of at least two of carbon black, titanium dioxide, iron oxide red and cobalt blue compounds;
the organic solvent is one or a mixture of at least two of butyl acetate, ethyl acetate, toluene and xylene.
8. The preparation method of the acrylic foaming shock absorption foam as claimed in claim 1, which is characterized in that: the method comprises the following steps:
s1, adding an organic solvent, foamed microspheres, an inorganic filler, a dispersing agent and an inorganic pigment into a reaction kettle, and mixing, dispersing and stirring at a high speed;
s2, adding acrylic polymer resin, fully grinding and dispersing, adding a curing agent, strongly stirring uniformly to obtain finished glue, filtering the finished glue by using a 100-mesh filter screen, standing and defoaming for a period of time to obtain acrylic foam mixed liquid;
and S3, coating the acrylic acid foam mixed solution on the release film layer (1), and heating in an oven to obtain the acrylic acid foam finished product.
9. The preparation method of the acrylic foaming shock absorption foam as claimed in claim 8, wherein the preparation method comprises the following steps: the oven temperature in S2 was as follows: the temperature of the first section of drying oven is 60-70 ℃, the temperature of the second section of drying oven is 60-70 ℃, the temperature of the third section of drying oven is 70-80 ℃, the temperature of the fourth section of drying oven is 70-80 ℃, the temperature of the fifth section of drying oven is 80-90 ℃, the temperature of the sixth section of drying oven is 120-130 ℃, the temperature of the seventh section of drying oven is 110-120 ℃, and the drying time is 5 min.
10. The preparation method of the acrylic foaming shock absorption foam as claimed in claim 8, wherein the preparation method comprises the following steps: the coating thickness of the acrylic acid foam mixed liquid in the S3 is 50-200 mu m.
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| CN113278385A (en) * | 2021-06-24 | 2021-08-20 | 江苏斯迪克新材料科技股份有限公司 | Removable acrylic acid foam adhesive tape |
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| CN113861497B (en) * | 2021-09-14 | 2023-03-03 | 浙江亚厦装饰股份有限公司 | Self-heating foam, preparation method thereof and adhesive tape |
| CN113861497A (en) * | 2021-09-14 | 2021-12-31 | 浙江亚厦装饰股份有限公司 | Self-heating foam, preparation method thereof and adhesive tape |
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