TW201018582A - A highly transparent soft touch material - Google Patents

Abstract

A highly transparent soft touch material which includes a base film with transmission greater than 60%, and a top coating covers partial or overall of the base film. The top coating has protrusion diameter of particle dp, and the average distance among protrusions Sm, with dp/Sm between 0.1 and 0.8. The transmission of the multi layered film is between 10% and 50%.

Description

201018582 IX. Description of the Invention: [Technical Field] The present invention relates to a material having high transparency and soft touch, including a method of manufacturing the same, which can be combined with other materials for various people to use The outer casing of the touched product, especially the communication and (four) sex electronics, has a soft touch and transparency requirements. The high transparency effect makes the pattern information on the back of the material easy to identify. [Prior Art]

It is a known technique to apply a material having a soft touch to a plastic material for use in the production of βο. In the early days, in order to provide a soft touch (for example, a leather-like appearance) on the surface of a plastic molded article or a metal molded article, it was directly sprayed on the surface of the molded article to form a coated material of suede. In Japanese Patent Laid-Open No. Hei 2-41243, it is disclosed that the pigment particles and the ionizing radiation curing resin are used to spray the material onto the film to produce a good effect, which is commonly known as a decorative board. However, this technique requires an ionizing radiation-curable resin composition, and it is necessary to irradiate an electron beam, etc., which becomes complicated and mass production is not satisfactory. Japanese Patent Laid-Open No. 59-202830, the entire disclosure of which is incorporated herein by reference in its entirety, the entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire However, when it is adhered to the surface of the molded part, the result of the interface is often poor due to the curve of the formed part. Therefore, Japanese Patent Laid-Open No. Hei 62-251111 proposes a method of first placing a thermoplastic resin sheet in an injection molding die; and then injecting a resin into the mold; thus obtaining a thermoplastic resin sheet (decorative board) and an injection molding, 201018582 type integrally formed 'The decorative plate and the curved injection molded part will not result in poor interface overlap. For the material part, 'U.S. Patent No. 5,354,397, 1994, Sekisui C., Ltd., discloses that the foam layer, the elastic resin and the elastic particles are used to cause surface unevenness, and softness can be obtained. A suede-like touch. In 2002, Sekisui further proposed the use of extrusion molding instead of injection molding to produce a soft touch panel in a roll-to-roll manner. 2〇〇6年美国公开专利20060078745' Bayer Bayer also discloses the use of foamed materials, elastic resins and elastic particles to create a soft surface feel for the uneven surface. Traditionally, these materials have been used primarily in automotive interior design, so materials with soft touches have often been combined with colorants for use with other materials. Therefore, the transparency of such decorative panels has never been discussed. With the popularity and lightness and thinness of consumer electronics and displays, the shell of a portable product must have a soft touch that people like, and it does not affect the display or display of the built-in pattern design. It has become an important feature. However, in the prior art, the transparency of the decorative panel has not been explored or improved, and there is no suggestion or guidance from the prior art, how to improve or control the transparency of the decorative panel, but still retain Its essential soft touch. SUMMARY OF THE INVENTION In order to achieve a soft touch, it is necessary to add a large amount of spherical elastic particles to cause the surface to have unevenness. However, since a large amount of particles are added to the tree, the transmittance of the material is greatly reduced by scattering. In general, the soft touch material obtained by the prior art has a transmittance of less than 1%. 9 201018582 The high light transmittance soft touch material of the present invention firstly reduces the internal light diffusion effect caused by the difference in refractive index between the resin and the substrate, so the refractive index difference of each material should be less than (M is preferably Q, G5. The secondary control elastic particles protrude from the surface roughness Ra, α achieves the soft touch effect of the material; the distance Sm' between the control points has reached the high transmittance, while still retaining Acceptable soft touch level. It can be applied to in-mold decoration technology, clearly showing the pattern of back printing, imitation of gold road and color, etc. (4) special silk, this 75 «low penetration The effect that the soft touch material of β-degree of light can not achieve. The method for controlling the distance Sm between the roughness Ra and the protruding point in this case mainly controls the viscosity of the translucent resin to be coated, and achieves different surface characteristics. The viscosity of the translucent resin is determined by the amount of the hardener added and the reaction time. The high transmittance soft touch material of the present invention comprises: a plastic substrate 2 having a light transmittance greater than _; Comprehensive or In addition, the surface of the semi-transparent resin having a surface of φ hemispherical v-shaped 12' light transmittance ranges from 10 to 50%, wherein the semi-transparent resin layer contains at least 5Q% to 99% of surface resin and 1-5_elastic spherical particles. The inorganic particles, pigments or dyes may be further included to adjust the refractive index, mechanical strength, abrasion resistance, and light transmission color of the region. The size of the inorganic particles ranges from 5 to 5 The transparent plastic substrate is selected from the group consisting of polycarbonate, polyacrylic acid, polymethacrylic acid vinegar, polyammonia, polystyrene, polysulfon, polyacetate, poly The group consisting of vinyl chlorides is mainly required to have high transparency, and the light transmission rate of 201018582 is required to be more than 80%, especially more than 90%. The soft tactile surface layer 12 used in the present invention is a thermoplastic resin. Refers to an elastomeric polymer material that is so-called rubber elastic at room temperature and can be plasticized into various shapes at high temperatures. The above thermoplastic elastomers include polyfluorinated (polyfluorinated) and polystyrene (Polystyrene). ), polyolefin (p〇iy Iefin), Polyester, Polyvinyl Chloride, Polyamide, Ionomer, Fluororubber, 1,2 - Polybutadiene (1,2 Polybutadiene) type, Trans 1,4-Polyisoprene and synthetic natural rubber, etc., can be used singly or in combination. Thermoplastic elastomers generally include: a soft segment molecule It is a rubber component with entropy elasticity; and with a hard segment molecule, it has a binding force to prevent plastic deformation. In the range of moldability, it sometimes contains a part of crosslinked structure. However, this does not include a high-density three-dimensional cross-linking network structure. The hardness of thermoplastic elastomers, according to JIS K6301A- and hardness standards, is preferably between 20 and 98. The standard varies with the desired softness and the hardness of the elastic particles used. A specific example of the above thermoplastic elastomer of the polyester ester is a block copolymer, the polyurethane is a hard segment, and the polyether, polyester, polycarbonate or the like is a soft segment. Specific examples of the polystyrene type include block copolymers in which polystyrene is used as a hard segment, and polybutadiene, polyisoprene, and polyethylene-polybutene are soft segments (referred to as SBS, respectively). SIS, SEBS block copolymer) and further into a 201018582 step hydrogenation or supplementation with an additional functional group of block copolymers. Specific examples of polyolefins include those having a polyolefin such as polypropylene as a hard segment and ethylene as a soft segment (abbreviated as EPM (ethylene-propylene-methylene bond)); those having a polyolefin such as polypropylene as a hard segment And a small amount of diene composition together with ethylene as a soft segment (abbreviated as EPDM (ethylene-propylene-disaliethylene bond), _ and EPM-called EPR (ethylene-propylene rubber), is composed of two Those who mix and change; and those who use organic peroxides to produce partial cross-linking; and that is not

Saturated warp monomer or unsaturated "derivative grafted modified; and butyl rubber grafted polyethylene. The hard and soft parts can be copolymerized or aggregated in a mixed manner afterwards. Specific examples of the polyacetal type include a block copolymer in which a polyester is used as a hard segment and a polypyrene as a soft segment or the like. Examples of gas-gathered vinyls, including the increase in the degree of polymerization of polyvinyl chloride to the extreme (the highly linear chain of polyvinyl chloride, 叇 σ, the degree of polymerization is between about 2,000 and about 2,500), such as three-dimensional Three-dimensional conjugate structure, and ionic cross-linking structure. In the case of polyamides, the sentence red is a soft segment and the polyether is a soft segment. 7: Choice: = good thermoplastic resin ' needs to consider the specific characteristics of the desired, if the desired characteristics include scratch resistance, abrasion resistance, good touch feeling and appearance, w 基, carboxylic acid is the best use. If good light resistance and heat resistance are required, vinegar is used to synthesize polyurethane. (4) Aliphatic acid which does not yellowish The condition for selecting the elastic particles 13 is mainly due to the particle size and the size of the film. It is necessary to cause the surface to be uneven. However, if the particles are too large, the coating will be very brittle. The average particle diameter of the elastic particles is usually between i and 50 μm, preferably between 3 and 20 μm.

For the elastic particles 13 used in the present invention, non-natural elastic particles may be used, including polyurethane, hollow polyurethane, silicone particles, acrylic resin (preferably acrylic acid-polyurethane resin), polystyrene, and styrene-isoamethylene. Made of materials such as olefin copolymers. Although it is desirable to use spherical elastic particles; the particles obtained by the cold beam pulverization method, a general aspherical shape, can also be used. In general, the elastic particles are used in an amount of about 20 to 200 parts by weight, preferably 50 to 150 parts, based on 100 parts by weight of the thermoplastic resin. Further, two or more kinds of elastic particles can be used at the same time. When a relatively soft thermoplastic resin is used, or a slightly rigid thermoplastic resin can be used, particles made of cross-linked polymethyl methacrylate or a hard inorganic material can be used. The present invention utilizes the inorganic particles 14 to adjust the refraction of the region. The rate, mechanical strength, and abrasive inorganic particles are mainly coated with dioxane, dioxin or bismuth. The size of the inorganic particles ranges from I. [Embodiment] Embodiment 1 is a diagram showing a high in accordance with a preferred embodiment of the present invention.

Polyamine S is a schematic view of the cross-sectional structure of the resin A. Among them, the soft touch coating 12 is obtained by the following

Isocyanate S A

13 201018582 Curing catalyst 0. 5 parts Elastic particles A 80 parts The above (4) is mixed and mixed to obtain a resin formulation, # is the material of the soft touch coating layer 12. The material was coated on a polyethylene terephthalate (pET) film or sheet and dried at 15 Torr for 15 minutes to form a 6 inch micron soft touch decorative panel. When the transparent resin coating 21 is applied to the surface of the soft touch coating 12 with the polyurethane resin A, the coating is about 1 to 2 μm thick, and a high transmittance soft touch is formed. The decorative sheet 20' transmittance is 30%. Example 2 Polyurethane Resin B 100 parts Elastic particles A 200 parts Isogas ester A 8 parts The above materials were mixed and mixed to obtain a resin formulation, which is a material of the soft touch coating layer 12. The material was applied to a polyacrylic acid (pMMA) film or sheet and dried at 80 C for 5 minutes to form a 1 μm conventional soft touch panel 10. When the transparent resin coating 21 is applied to the surface of the soft touch coating 12 with the polyurethane resin B, the coating is about 1 to 2 μm thick, and a high-transparency soft touch decorative panel 20 is formed, and the transmittance is 40%. In the third embodiment, the main agent (the urethane resin L60H150 of Xinzhengfeng Co., Ltd.) and the hardener (the aliphatic isocyanate H79 of Xinzhengfeng Co., Ltd.) are mixed in proportion, and then uniformly stirred at room temperature, the translucent resin is obtained. Coated on a 180# m polycarbonate through 201018582 on a substrate with a 'coating thickness of 70'. Will be painted

, ν layer is dry, the condition is 8 (TC 5 / knife 钟 ' to get samples a, B and C. After a 矣 矣 话 L 表面 表面 表面 表面 surface covering - layer about 1 to 2 microns thick transparent resin, get Α1; in the table of β and love # 伽心衣面 Covering a layer of transparent resin about 2 to 4 microns thick, to get Β1; covering the surface of the flank of β with a layer of about 1 to 2 times) Skin large 5 () to 1 00 times, the photo is shown in Figure 3. Its special ΠΓ main sample hardener containing viscosity Ra light through the flat area (parts) (cps) (egg) dp rate (%) (%) L ab photo x magnification A 13 71 8 5 7 16 21 ] 46 5.1 -3 3 Δν^η B 15 86 5 5 9 27 57 59 C Π 110 3 4 11 41 88 ----- 70 — 0 A -0.7 ΒΧ100 A1 NA ΝΑ 6 4.5 10.5 28 63 ―-- 60 4 4 CX50 A1X50 B1 NA ΝΑ 2 2 12 47 97 74 6 -1 B1X50 B2 NA ΝΑ 2 3 12 46 95 73 6 -2 B2X50 E NA ΝΑ ΝΑ ΝΑ ΝΑ 4 Ν/Α 44 7.2 11 EX 100 Note:

1 _ Ra 'particles are convexly convex south, Sm is the average distance between the particles and the center point of the particles ' dp : the exposed diameter of the convex hemisphere; measured by optical microscopy (Olympus optical microscope, Model SIM6) result. 2. Open area, which is the percentage of the area where the particle protrusion height is less than 2 vm. This data is obtained by observing the result under the optical microscope and calculating the area by drawing the grid. The calculation area is 125/. Zmx93 “mat 50X.” 3. The main agent is the polyurethane foam L60H150 of Xinzhengfeng Company, the hardener is the aliphatic isocyanate H79 of Xinzhengfeng Company, and the hardener content is based on the main agent of 15 201018582 100 parts. 4. Sample E: The main agent is the polyurethane foam of Xinzhengfeng Company, the hardener is the aliphatic isocyanate H79 of Xinzhengfeng Company, and the hardener content is based on 100 parts of the main agent. 5_L, a and b Refers to the color coordinates in the UCS color gamut, where the value of l refers to the brightness, and the measurement method is performed according to JIS K7105. 样品 The samples F1 to F5 are produced by the above method, and the optical microscopic analysis photographs are as shown in Fig. 2. The surface characteristics are as follows: degree

--J=二-I 川丨 rj The relationship between the flat area (〇pen area %) of the above data and the light transmittance (M) can be obtained as shown in Fig. 5. From this linear relationship diagram, the higher the percentage of the flattened area, the higher the light transmittance. Further, the relationship between the dp/sm value of the elastic particles and the flattening area (Fig. 10) can be obtained as shown in Fig. 6. The smaller the linear value, the higher the percentage of the whole area, the more light _ the more the soft touch is directly touched by 1G people, and the result of voting is 1 to medium, with the degree 4 being the most Soft and pleasant. However, sample F5 was considered to be not soft by more than half of the people. Therefore, when d - less than 5/30 (that is, 〇.〇8), the surface of the material has no soft touch. The light transmission rate is 16%, and its dp/Sm value is 5/7 (that is, 〇. 71). The material light transmission 16 201018582 degrees less than 10% can not fully display the back pattern, which is not the present invention. Therefore, the dp/Sm value is kept between 〇1 and 〇8, so that the overall light transmittance of the material ranges from 1〇 to 50%, that is, it can have both a soft touch and a clear back pattern. Embodiment 4 Please refer to FIG. 7 , which is a cross-sectional structural diagram of a high transmittance soft touch panel according to a preferred embodiment of the present invention, wherein the high transmittance soft touch panel 30, It is obtained by the following method. The high transmittance soft touch decorative panel 20 obtained above is patterned on the flat surface (and non-soft touch surface) by screen printing technology. The content 31 is printed. The printed material is placed in the open injection molding cavity to make the surface with soft tactile properties away from the resin injection port. The film or plate m is electrostatically placed in the cavity. After the mold is closed, the relative viscosity is 1.3 (in the concentration of dichloromethane solution 〇. 5 /1〇〇ml, 2〇. The measurement of bisphenol〇1 A p〇lycarb〇nate is injected into the cavity to form the back plate 32' to obtain a high transmittance soft touch cover. The plate has a total thickness of 6 mm. In the fifth embodiment, the material prepared in the second embodiment is printed on the surface of the plastic substrate, and then the pressure-sensitive adhesive (Xinzhong Company HT 7嶋) is applied. It can be easily decorated with a simple pattern to decorate various surfaces with a pattern of soft touch and anti-slip function. The main one should be $ as a desktop H mouse pad and standard. 17 .201018582 [Simple diagram The above and other objects, features, advantages and embodiments of the present invention will become more apparent. The detailed description of the drawings is as follows: FIG. 1 is a view showing a high light transmittance of a preferred embodiment of the present invention. 2 is a schematic structural view of a high transmittance soft touch decorative panel according to another preferred embodiment of the present invention.

Figure 3 is an optical microscope observation of a high transmittance soft touch material. Photographs A, B, C, Al, Bl, B2 and E Figure 4 is an optical microscope for high transmittance soft touch materials. Observation photographs F1 to F5 Fig. 5 is a relationship between the flat area (〇peil area) and the light transmittance (T%). Fig. 6 is the relationship between the dp/SM value and the open area (open area). The figure shows a schematic cross-sectional structure of a high transmittance soft touch panel according to a preferred embodiment of the present invention. [Description of main component symbols] A: Projection pitch Sm B : Surface thick chain degree Ra 10 : Soft touch decorative panel 11 : Substrate 12 : Soft touch coating 13 : Elastic particles 14 : Inorganic particles 20 : High permeability Photometric soft touch decorative panel 21: Transparent resin coating 30: High transmittance soft touch cover 31: Screen printing pattern 32: Plastic material back sheet 18

Claims (1)

.201018582 X. Patent application scope: 1.-A kind of high-transparency soft touch material' contains: __plastic substrate, its light transmittance is more than 60%·, and there is another layer of surface on it. a semi-transparent resin layer having a hemispherical shape, a convex hemispherical exposed diameter dp, an average pitch Sm of the convex points, and a dp/S?^ between the 〇" and the 〇8, the overall light of the material The transmission range is from 10 to 50%. 2. If you apply for a patent range! The high-transparency soft touch material described in the item has an area of the flat area of 2/zm or less on the surface of π to between. ❿ 3. The high light transmittance soft touch material according to claim 1, wherein the translucent resin layer has a thickness of between 15 and 100/zm. 4.- A material with high transparency and soft touch, comprising at least a plastic substrate, on which a layer of semi-transparent resin having a hemispherical surface is present, and on the hemispherical surface thereof - The transparent resin layer partially fills the recess between the hemispheres, but is not completely filled, and the convex hemispherical exposed diameter is made, and the average pitch Sm of the convex points is 'the dp/Sm value is between Between 8 and 8, the overall light transmittance of the material ranges from 10 to 50%. _ 5• The soft touch of high transmittance as described in claim 4 of the patent application, wherein the transparent: resin layer can arbitrarily change the filling amount of the recess to control the protrusion height and transmittance of the surface of the material . 6. The high-transparency soft touch material as described in claim 4, wherein the 匕X is permeable to the moon tree, selected from the group consisting of polyamines, polystyrenes, and polysaturated hydrocarbons. A group consisting of polyfluorene-based polystyrene, poly- ugly amines, ionomers, fluoroelastene, U poly-confine polyisoprene, and synthetic natural rubbers. 7. The high-transparency soft touch material as described in the fourth paragraph of the patent application No. 4 201018582 A wide semi-transparent resin layer containing at least 5 (10) - 9 (10) resin material and 5 - elastic spherical particles And selected from the group consisting of hollow foamed particles of acrylic resin, polystyrene, and dichloroethylene-(tetra)-copolymer. 8. The high light transmittance soft touch material according to claim 7, wherein the elastic particles comprise polyurethane, hollow polyurethane and Shiyuesheng particles. 9. The high-transparency soft touch material as described in claim 7 and wherein the elastic particles have a particle size ranging from 丄 to 5 μm and from 3 to 30 μm. Preferably, some of the particles are distributed on the surface of the coating, and the surface roughness ranges from Φ to 3 to 1 μm. 10. A high-transparency soft touch material as described in claims 4 and 4, wherein the refractive index difference between the elastic particles and the transparent resin is 〇. 11. The high light transmittance soft touch material as described in claims 4 and 4 wherein the plastic substrate is selected from the group consisting of polycarbonate, polyacrylic acid, polydecyl acrylate, polyurethane, and polystyrene. A group consisting of ethylene, polyolefins, polyesters, and polystyrene. 0. The high light transmittance soft touch material as described in claims 1 and 4 wherein the hemispherical translucent resin layer may further comprise inorganic particles, pigments or dyes to adjust the region. Mechanical strength, wear resistance, and color of light transmission. 13. The high light transmittance soft touch material as described in claim 12, wherein the inorganic particles have a size ranging between 5 〇 nm and 5/zm. 14. The high-transparency soft touch material as described in claims 1 and 4 wherein the plastic substrate is polycarbonate, the hemispherical resin layer is polyamine-based 20 201018582 vinegar and The rubber particles, the inorganic particles are cerium dioxide, dioxins or hollow cerium. 1-2—a method for adjusting the transparency of a soft touch material, comprising the steps of: selecting a substrate (A) having a transmittance, and uniformly coating or partially printing a layer of semi-spherical elastic particles thereon a semi-transparent resin layer; (8) controlling the hemispherical elastic particles such that the convex hemispherical exposed straight #dp has an average spacing of 3«1 of the convex points, and the dP/Sm value is between ◦.丨 and 〇. Between 8 and 8, the overall light transmittance of the material ranges from 10 to 50%. 1616. - A transparent cover with a soft touch and a printed finish, comprising a soft touch material as described in claim 7 of the patent application, combined with a rigid plastic back with a printed pattern, two tight Bonded to keep the shape of the cover from deforming. 17. The transparent outer cover having a soft touch as described in claim 16, wherein the plastic back sheet is selected from the group consisting of polycarbonate, polymethyl methacrylate, polystyrene, polyethylene, and poly. a group consisting of ethylene dibenzoate. _ 18_—A decorative patch with a soft touch that utilizes the soft touch material of the high transmittance of the patents in items 2 and 4 on the surface of the plastic substrate or in the soft touch layer. On the surface, after printing the color or black-and-white pattern by printing or other means, the decorative patch can be manufactured by coating or laminating the adhesive material on the plastic substrate layer. twenty one