TWI373410B - A highly transparent soft touch material - Google Patents

Description

1373410

IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a material having a high transparent sound, a mile, a door, and a monthly touch, and a soft touch, including a method for producing the material, which is 盥t ^ With his material combined with the shell for a variety of products that people touch with their hands, especially communication and fading electronics, where soft touch and lightness are required. The high transparency effect makes the pattern information on the back of the material easy to identify. [Prior Art] The plastic material is coated with a material that is soft to the touch of geology, and is used for products that are often touched by human hands. In the early days, in order to provide the surface of a plastic molded product or a metal molded product, there was a flaw in the texture of the two songs (for example, a suede-like soft appearance), and the appearance of the molded article was directly applied to the appearance of the molded article. A layer of suede-coated material, which is disclosed in Japanese Patent Laid-Open No. Hei 2-41243, discloses 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 technology f t_shot curing resin composition, which must be irradiated with an electron beam, etc., becomes complicated and mass production is not ideal. : , Japanese special Kaiping 59-202 coffee patent number, all proposed to use injection molding, technology ' The board is made into a decorative board to produce a surface with a soft touch. However, when the surface is formed on the surface of the molded part, the result of the interface is often poor due to the curve of the formed part. si, the Japanese Patent Application No. 62_2511u No., a method is proposed, in which a thermoplastic resin plate is first placed in an injection molding process; and then a resin is injected into the mold; thus, a thermoplastic resin plate (decorative plate) can be obtained and injected into 1373410

The profile is integrally formed so that the decorative panel and the curved injection molded part do not result in poor interface overlap. For the material part, U.S. Patent No. 5,354,397, 1994, Sekisui Co., Ltd., discloses that the use of a foamed layer, an elastic resin and elastic particles to cause surface unevenness can be obtained as soft as A suede-like touch. In 2002, the accumulated water was further proposed to use extrusion molding instead of injection molding to produce a soft touch panel in a roll-to-roll manner. 2006

Bayer Bayer, Inc. also discloses the use of foamed materials, elastic resins and elastic particles to create a soft surface feel by using a foamed material, an elastic resin and elastic particles. Traditionally, these materials have been mainly used in automotive interior design, so materials with soft touches have often been combined with other materials to make the transparency of such decorative panels never discussed. With the popularity and lightness of consumer electronics and display (4), the outer shell of the portable product must have the soft touch of people and the display or display of the built-in pattern design.

No, the transparency of the decorative panel becomes an important characteristic. However, in the previous 2, 'there is no discussion or improvement on the transparency of the decorative panel, and there is no previous darkness or teaching 'how to upgrade or control the decoration. The transparency of the board, but still retains its necessary 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·j to cause the surface to have unevenness. However, due to a large number of particles = resin ^ also caused a large drop in the transmittance of the material due to scattering. The softness of the soft touch material of the technical parts is less than 10%. 5 The high-transparency soft touch material of the present invention firstly reduces the internal light diffusion effect caused by the difference in refractive index between the substrates and the substrate, so the refractive index difference of each material should be less than 〇·丨. H times to control the elastic particles protruding from the surface of the material, the thick chain Ra, U to achieve the soft touch effect of the material: in the control of the distance between the convex points Sm, has achieved the effect of high transparency, while still retaining acceptable Please refer to the i-th picture for the soft touch level. This can be applied to the in-home decoration (inGl decoration) technology, which clearly shows the pattern of the back printing, or the special effect of imitation metal lines and colors, which is not the soft touch material of the low transmittance before the case. The effect achieved. In the present case, the method for controlling the distance between the roughness Ra and the protruding point mainly depends on controlling the viscosity of the translucent resin to be coated to achieve different surface characteristics, or on the translucent resin layer, and then coating-transparent. Layer, as shown in Figure 2. The viscosity of the translucent resin is determined by the amount of the hardener added and the reaction time. The high-transparency soft touch material of the present invention comprises: -_substrate 2' having a light transmittance of more than 6 (%); and a semi-transparent resin surface having a hemispherical shape on the whole or part of the layer 12, the light transmittance range is W - . Wherein the hemispherical translucent resin layer' contains at least 5% by weight of enamel resin and blister's elastic spherical particles. Further, inorganic particles, pigments or dyes may be included to adjust the refractive index, mechanical strength, abrasion resistance, and light transmittance of the region. The size of the inorganic particles ranges between 5 〇 nm and between. D Haiyueyue plastic substrate is selected from the group consisting of polycarbonate, polyacrylic acid, polymethacrylic acid vinegar, polyurethane, polystyrene, polyolefin, polyester, and polyvinyl chloride. group. The main requirement is high transparency and light transmission.

The rate needs to be greater than 80%, especially greater than 90%. The soft tactile surface layer 12 used in the present invention is a thermoplastic resin and refers to an elastomeric polymer material which has so-called rubber elasticity at room temperature and can be plasticized into various shapes at a high temperature. The above thermoplastic elastomers include Polyurethanes, Polystyrenes, Polyolefins, Polyesters, Polyvinyl Chlorides, Polyamides. Ionomer type, Fluororubber, 1 '2-polybutadiene type, Trans 1,4-Polyisoprene and synthetic natural Rubber, etc., can be used alone or in combination. Thermoplastic elastomers generally include: a soft segment molecule is both a rubber component and has entropic elasticity; and with a hard segment molecule, it has a binding force to prevent plastic deformation. In the moldable range, it sometimes contains a part of the crosslinked structure. . However, this does not include a high-density three-dimensional cross-linking network structure. The hardness of the thermoplastic elastomer is preferably from 20 to 98 in accordance with JIS K6301A- and hardness standards, and the standards vary depending on the desired softness and the hardness of the elastic particles used. Specific examples of the above thermoplastic elastomer of the urethane type are 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 block copolymers that are either gamma hydrogenated or supplemented with additional functional groups. ------.----, a specific example of a polyolefin includes 'polyolefins such as polypropylene as a hard segment, and ethylene as a soft segment (abbreviated as EPM (ethylene-propylene-arylene bond) ); those with a combination of smoke, such as polypropylene as a hard segment, and a small amount of diene, together with ethylene as a soft segment (referred to as the face (acetonitrile _ propylene propylene), together with _ is called EPR (Ethylene-Silver Rubber) is obtained by mixing the two; and those which are further partially crosslinked by organic peroxides; and those grafted with unsaturated (4) or unsaturated (4) derivatives; And butyl rubber, grafted polyethylene, etc. The hard segment and the soft portion can be copolymerized during polymerization, or can be completed in a mixed manner afterwards. Specific examples of the polyacetate type include a block copolymer in which polyester is used as a hard ·^又和聚检 as a soft segment, etc. Examples of polyvinyl chlorides, including those whose degree of polymerization of polyvinyl chloride is increased to the extreme (highly linear polymerization of polyethylene); the degree of polymerization is from about 2 to about 2,500. 'methods such as three-dimensional crosslinked structures, and ionic crosslinked structures. Examples of polyamides The sub-includes those with polyamide as the hard segment and the shout as the soft segment. The choice of the best thermoplastic resin requires consideration of the specific performance characteristics required. For example, the four desirable properties include scratch resistance and wear resistance. Urinary lysine is best used for good touch and appearance. If good light fastness and heat resistance are required, it is necessary to synthesize polyurethane with non-yellowing aliphatic isocyanuric acid. The condition for selecting the elastic particles 13 is mainly due to its particle size and must be sufficient for 1373410

Large to cause surface irregularities, but too large particles will cause the coating to be very brittle. The average particle diameter of the elastic particles is usually between 1 and 50 μm, preferably between 3 and 20 μm. As the elastic particles 13 used in the present invention, non-natural elastic particles can be used, including ^^氦g曰, hollow polyamine vinegar, ishixiong granules, acrylic resin (preferably acrylic-polyurethane resin), polystyrene and benzene. Made of materials such as ethylene-isoprene copolymer. Although it is desirable to use spherical elastic particles, the particles obtained by the freeze-pulverization method are generally aspherical in shape and can also be used. In general, the elastic particles are used in an amount of about 20 to 200 parts, preferably 5 to 15 parts by weight based on the 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 an inorganic material of cross-linked polymethyl keto-acid (4) hard f can be used. The present invention utilizes the inorganic particles 14 to adjust the particle. The inorganic particles of the refractive index, mechanical strength, and wear resistance of the region are mainly encapsulated in dioxo, titanium dioxide or medium. The size of the inorganic particles is in the range of 5 - and [Embodiment] Embodiment 1 Referring to Figure 2, a schematic cross-sectional view of a high-transparency soft tactile decorative panel in accordance with a preferred embodiment of the present invention is shown. Among them, soft touch sensation 1 Ο From I..-. Polyurethane resin A 100 parts isocyanine vinegar A 10 parts 9 Curing catalyst 0·5 parts of elastic particles A 80 parts The above materials are mixed to obtain _resin formula, ie The material is coated on a polyethylene terephthalate film or sheet for a soft touch coating material 12 at 8 inches.匸 After drying for 15 minutes, a 6 μm thick coating layer is formed to form a soft touch decorative panel 1G as in (3). Then, the polyurethane resin Α# transparent resin coating 21' is applied to the surface of the soft touch coating 12, and the coating is about 1 to 2 micrometers thick, and a high transmittance soft touch decorative panel is formed. The luminosity is 3〇%. Implementation - Polyurethane Resin B 100 parts Elastic particles A 200 parts Isocyanate A 8 parts The above materials are mixed and mixed to obtain a resin formulation, which is the material of the soft touch coating layer 12. The material is coated on a poly(meth)acrylic film or a sheet, and after drying at 80 ° C for 5 minutes, a coating of 1 μm thick is formed, which is the soft touch decoration of FIG. 1 . Board 1 〇. Then, the polyurethane resin B is used as the transparent resin coating layer 21 to cover the surface of the soft touch coating layer 12. The coating layer is about 1 to 2 micrometers thick, and a high transmittance 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 with 180#111 polycarbonate

1373410 1. Ra: the average protrusion height of the particles, Sm is the average distance dp between the particles and the center point of the particles. It is the exposed diameter of the convex hemisphere; the result of observation under the optical microscope (Olympus optical microscope, Model SIM6) . 2. The open area is the percentage of the area where the particle protrusion height is less than 2"m. This data is obtained by observing the results under an optical microscope and calculating the area by the square of the grid. /ΖΙΠΧ93 /zmat 50X) 〇3. The main agent is the polyamine phthalate resin L6〇H15〇 of Xinzhengfeng Company, the hardener is the aliphatic isocyanate H79 of Xinzhengfeng Company, and the hardener content is 1373410 ^ (the main agent) ( \% μ«γτ<·ι ίι mt ιι ·ι , ij_ ^»»t. · , f

The loo share is the benchmark P 4. σ E. The main agent is the polyamine-based Lg-tree saponin L6 of Xinzhengfeng Company. . The chemical agent 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 refer 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. Fly the above-mentioned method to produce samples F1 to F5 whose optical microscopic analysis photographs are as follows: F4 3.5 34 F5 20 45 80 95 F3X50 Mapping the flat area of the above data (CDpen (10) illusion and light transmittance (10)) You can get to the relationship as shown in Figure 3. From this linear relationship diagram, the higher the percentage of the flattened area, the higher the light transmittance. . Further, the dp/sm value of the elastic particles is also rounded with the flat area, and the relationship as shown in Fig. 4 can be obtained. From this linear relationship diagram, the smaller the dp/sm value, the higher the percentage of the flat area, and the higher the light transmittance. The degree of soft touch is measured by the 1G person and the result of voting is 'degree 1 to 4', and the degree 4 is the softest and most pleasant. However, sample F5 was considered to be not soft by more than half of the people. Therefore, when dp/ is less than 2. 5/30 (that is, 〇·〇8), the surface of the material has no soft touch. The light transmittance of the sample VIII was 16%', and its dp/Sm value was 5/7 (i.e., 〇 71). The light transmission of the material 12 The effect of the back pattern The fourth embodiment is less than 10%, and the pattern of the back side cannot be fully displayed, > Therefore, the 'dp/sm value is kept between G 8 so that the light transmittance of the whole material is in the range of W, that is, it can have both a soft touch and a clear appearance. Referring to FIG. 5, it is preferred according to the present invention. A schematic cross-sectional view of a high transmittance soft touch panel of an embodiment. Among them, the high light transmittance soft touch panel 3 0 ' is made by the following method. The above-mentioned transparent light-sensitive touch panel is mounted on the flat surface (and non-soft touch surface), and the pattern content 31 to be presented on the cover is printed by screen printing technology. The printed material is placed in the open injection molding cavity so that the soft touch characteristic side is away from the resin injection port. The film or sheet is fixed to the cavity (10) in an electrostatic manner. The second viscosity polycarbonate (bisPhen〇l A pQlyCarb_te) having a relative viscosity of 1.3 (measured in dichlorofane solution concentration 〇 gram·ml, measured under the muscle) is injected into the cavity to form the back plate 32' to obtain a high permeability. The luminosity soft touch panel is 3 inches and has a total thickness of 6 mm. Example 5, the % of the sample - the material produced, after printing the pattern on the surface of the plastic substrate, and then a layer of pressure sensitive adhesive (New China company HT 7006), so that you can use a simple paste to pattern It is decorated with various surfaces and has a soft touch and a slip-proof function. The main applications are as desktop decoration, mouse pads and labels.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will be more clearly understood. The detailed description of the drawings is as follows: Figure i (10) shows the present invention - preferred embodiment Schematic diagram of the high transmittance recording material 枓. Guard net: 2 is a schematic cross-sectional view of a high-transparency soft touch decorative panel which is not in accordance with another preferred embodiment of the present invention. $3 (four) 4 Qpen area and S penetration rate (T%) diagram f 4 diagram is the relationship between dp / SM value and flat area (open fine) Figure 5 is a diagram according to one of the present invention A schematic cross-sectional view of a high transmittance soft touch panel of the preferred embodiment.

Attachment 1 is an optical microscope observation of high-transparency soft touch materials. A, B, C, Al, Bl, B2 and E. Attachment 2 is an optical microscope observation photograph F1 of high transmittance soft touch material. To F5 [Description of main component symbols] A: Projection pitch Sm 1〇: Soft touch decorative panel 12: Soft touch coating 14: Inorganic particles 21: Transparent resin coating 31: Screen printing pattern B: Surface roughness Ra 11 : Substrate 13 : Elastic particles 2 〇: High transmittance Soft touch decorative panel: High transmittance soft touch panel 32 : Plastic material back sheet

Claims (1)

1373410 (♦I I. ί·· » .«.., Patent Application: 1 _ Μ ---- 1. A high-transparency soft touch material, including: a plastic substrate, its light transmittance More than 60%; a semi-transparent elastic resin layer having a hemispherical shape on the surface, or a convex hemispherical exposed diameter dp, an average pitch Sm of the convex points, and a dp/Sm value Between 〇.1 and 〇8, the overall light transmittance of the material ranges from 10 to 50%; wherein the transparent elastic resin layer has a thickness of between 20 and 1 〇〇, and is selected from the group consisting of polyurethanes and poly Stupid Ethylene, Polyolefin, Polyester, Polyurethane, Polyamide, Ionomer, Gas Rubber, 3:) 2 Polybutene, Trans-Polyisoprene and Synthesis A group of natural rubbers. 2. The high-transparency tactile sensation material as described in the Scope of the EF Patent Application has an area of 2 mm or less of the flat area of the surface of 15 to 9〇%. 3. A high-transparency soft touch material comprising at least one plastic substrate, and a layer of semi-transparent elastic resin having a hemispherical surface thereon; wherein the moon-shaped bomb! The thickness of the tree layer is 2 〇 to! Between m, on the hemispherical surface, I-transparent resin layer' part fills the concave between the hemispheres, but not completely filled, ^ the hemispherical exposed diameter, the average of the convex points The spacing is like the value, and its dp/Sm value is between 〇丨盥〇. At 1〇_5〇%. Between the two, the overall light transmittance of the material range is 4. As in the patent application, the third transparent tree m is the sound ^ and the soft touch of the light, wherein the height of the μ light: the amount of filling of the recess, To control the convexity of the surface of the material. 5. As claimed in the scope of the patent range i and the section, wherein the hemispherical (four) luminosity (four) soft touch sensitive material elastic resin layer contains at least 50% _99% tree 1373410 fat material and 50% elasticity Spherical rough, selected from ^ A group of hollow foamed particles of an alkene and a dichloroethylene-(tetra)nitrile copolymer. The high transmittance soft touch material according to claim 5, wherein the elastic particles comprise a poly Ammonia §, hollow polyamine g and (iv) particles. 7. The high-transparency soft touch material as described in claim 5, wherein the particles of the elastic particles range from 3 to 3{), and the particles are distributed on the surface of the surface. Degree _ is between 3 and 4 meters. 8, such as the scope of patent application! And a soft touch material having high transmittance as described in 3, wherein the refractive index difference between the elastic particles and the transparent resin is $〇1. 9. The high-transparency soft touch material according to claim 1 or 3, wherein the plastic substrate is selected from the group consisting of polycarbonate, polyacrylic acid, polymethyl methacrylate A group consisting of ammonia, polystyrene, polystyrene, polyacetate, and polyvinyl chloride. 10. For applying the high-transparency soft touch material described in the above-mentioned 丨 丨 and 项 3, wherein the hemispherical translucent elastic resin layer may comprise inorganic particles, pigments or dyes. Adjust the mechanical strength, wear resistance, and color of light transmitted through the area. 11. The high-transparency soft touch material as described in claim 10, wherein the inorganic particles have a size ranging from 5 to 10,000. 12. The high-transparency soft touch material as described in the above-mentioned H. patents, wherein the plastic substrate is polycarbonate, and the hemispherical resin layer is a polyurethane and a rubber shaft. The inorganic particles are dioxo, titania or hollow dioxide. S ~ Rigid plastic backing plate, the two are closely combined to keep the shape of the outer cover invariant. 14. The transparent outer cover having a soft touch as described in claim 13, wherein the plastic backing is selected from the group consisting of polycarbonate, polymethyl methacrylate, polystyrene, polyethylene, and poly A group consisting of ethylene terephthalate. The system uses the scope of the patent application A decorative patch with a soft touch, which can be used to make a decorative patch after the sorghum and the third item are printed on the soft touch eyebrow pattern.