TW587981B - Artificial wood using thermoplastic material as base material for prototype mold or sand casting mold - Google Patents

Abstract

An artificial wood using a thermoplastic material as a base material includes (a) a thermoplastic material in a discontinuous phase as a base material; and (b) a filler in a continuous phase being selected from a group consisting of calcium carbonate, talc, mica powder, wood powder, hollow glass beads, hollow ceramic beads, and hollow plastic beads with a melting point higher than that of the thermoplastic material, in which the filler used provides 48% to 60% in volume in the artificial wood, and the specific gravity of the artificial wood is 0.84 to 1.8 depending on the specific gravity of the filler.

Description

587981 Case No. 9012975Π V. Description of the Invention Background of the Invention Conventional resin), res i η), or light weight materials such as plastic, nails, drills, etc., or plastic materials such as molds and plastics. In the past, there have been patents, 188354, intermediate materials, materials such as wood substitutes, the strength and the use of foaming past wood, from the vertical early cutting performance is not modified (1) wood substitute unsaturated polyamines or low ratio The hardening agent and the shaped injection materials for wood can be said to have the use of the patented 192-year-old composite material oxygen resin 'has its physical properties. In addition to the agent, it is used in wood systems and is easily broken. It is based on Liquid resin, such as epoxy resin (e ρ OX y polyester resin (UP, unsaturated polyester formic acid ester (PU, polyurethane)) Add a certain proportion of filler, and then add a hardener to make the liquid mixed chemical reaction Forming a net structure and setting. The setting has similar characteristics to wood, and can be cut, chipped, planed, and processed in the same processing method to achieve the desired shape. Generally, it can be used in sanding models, shoe material prototypes, and prototypes. Parts and molds in the automotive industry. For Yoyogi, the production method is a continuous pouring system hollow hollow agricultural power. 17 Petrochemical The certainty of the air ball does not need to be added to the manufacturing method and the prototype mold is displayed in the sand turning mold. The preparation of the epoxy compound has a patented amount of composite materials and a foaming degree range. The foaming agent and the mold or turning tool The company's physical resins are limited to the patented method for the production of rings for patented public materials. For (0. 4-0. 9 to reduce the dense complexity of sand molds, composite materials are produced by different methods. 9 In 2011, Taiwan ’s application number was an oxyresin composition, 'g / cm 3 currently used in the patent to maintain the degree. Previous cases except rain. Most of the original forest materials use their wood grains with horizontal and' such as The longitudinal wood grain is broken and turned over in the mold

Page 5 587981 --tm,., 90129750_ year, month, day, five, description of the invention (2) '----- In CNC high-speed engraving with sand process =, if the pattern of the shoe mold is thin and encounters wood grain , It is easy to break due to CNC rapid cutting, causing troubles and reducing production rate. In view of this, my personal consideration on this point, coupled with nearly ten years of experience in plastic processing technology, concentrate on == rubber characteristics to make up for problems such as wood horizontal stripes ”, and through the experiments and formulas Adjustments, supplemented by theories, have led to the invention of "埶 塑 '= 木". …, Generation [Explanation of the Invention] And the present invention uses a thermoplastic with a higher glass transition temperature (Tg) as the main substrate, such as Polyvinyl Chloride (PVC), acrylic? Diene-styrene copolymer (ABS), acrylic? -Styrene copolymer (AS), polystyrene (PS) or impact-resistant polystyrene (H〗 ps), etc .; and a filler added to the substrate, the filler may be calcium carbonate, Talcum powder, mica powder, wood powder, or even glass hollow balls or a mixture of such fillers, and hot pressing to form wood substitutes. Since this type of wood is based on thermoplastic plastics, waste or side materials can be recycled and reused. In terms of environmental protection, its value is far higher than traditional thermosetting wood that cannot be recycled. As the present invention is based on thermoplastics with high glass transition temperature (g 1 ass transition temperature, Tg) as the main substrate, such as PVC, ABS, AS, PS or HIPS, these plastics are all rigid materials. If you want to adjust the soft hardness of wood substitutes made of this kind of plastic, for PVC series, you can add plasticizers such as D0P to reduce its hardness, and PS, HIPS and other series of wood substitutes can add styrene-butadiene Ethylene-styrene block copolymer (SBS) or SEBS (Stupid ethylene-ethylene-butene-styrene group

Page 6 587981-He 90129750_ Year, month, day, and fifth. Description of the invention (3) Block copolymer) Reduce the hardness of the wood and increase its toughness. Considering the amount of SBS added, it is added with PS or HIPS. The ratio range is SBS: PS (or HIPS) = (5 parts by weight · 95 parts by weight) ~ (50 parts by weight: 50 parts by weight), and the preferred range is SBS: PS (or HIPS) = (15 parts by weight: 85 parts by weight) ~ (3 5 parts by weight: β 5 parts by weight), such a wood substitute also has considerable toughness, and it is not easy to crack or collapse when the wood is machined.

The spirit of the present invention is mainly that a relatively large amount of filler is blended into the above-mentioned plastic mixture, and the amount of this excessive filler must be at least greater than the volume percentage (that is, about > 48% or more) of the plastic mixture. By blocking the continuous phase (COnt inu〇us phase) of the plastic mixture with an excessive volume of filler, the purpose of "phase reverse" is achieved, so that the original belongs to the "continuous phase" (c ο ntinu 〇usphase) The plastic mixture is converted into a "discontinuous phase"; and the filler of the original discontinuous phase is converted into a continuous phase. Such a conversion makes the plastic mixture a binder-like, and the continuous phase It is a substitute for fillers. When wood is machined (such as cutting, shaving, nailing, planing, etc.), the phase of the fillers will block the high-speed processing, which will greatly reduce the "raw edges" caused by high-speed processing of traditional plastics. "Problem", for the production of molds, the work of trimming can be omitted.

In this matter, the choice of resin is mainly based on the resin with a higher T g point. It is the mixture of PS or HIPS and SBS or SEBS, or the mixture of abs, AS, and SBS. The last choice is plasticizer. Adjust the hardness of PVC. The most preferable choice of the above resin is high impact polystyrene (HIPS) with impact resistance.

Page 7 587981 _ case number 90129750 j__ V. Description of the invention (4) The composition of styrene-butadiene block copolymer (SBS) is a thermoplastic elastomer that increases the toughness of wood substitutes. Due to the high glass transition temperature (Tg) of resins such as polystyrene, burrs are less likely to occur during the "wood-generation" cutting process. SBS or SEBS thermoplastic elastomers are used to reduce The "yoyogi" hardness and increased toughness can make up for the "yoyoki" cracking or cracking caused by the stress of machining during the cutting process, making the "yoyoki" easier to process. In the present invention, the range of the addition ratio of PS (or ΗIPS) and SBS (or SEBS) is: ps (or HIPS): SBS (or SEBS) = (95 parts by weight: 5 parts by weight) ~ (50 parts by weight: 50 parts Weight), what is the preferred range? 3 (or 111? 3): 363 (or 8 £ 68) = (85 parts by weight: 15 parts by weight) ~ (65 parts by weight · 35 parts by weight), such resin composite ratio, plus the following The filler mentioned above, "Yoki" is easy to cut, cut, nail, planer and other characteristics, will be fully revealed. In the present invention, the filler added to the plastic substrate may be calcium carbonate, talc powder, mica powder, wood powder or even glass hollow balls or a mixture of such fillers. Take glass hollow spheres with true specific gravity 0.7 ~ 0.8 (apparent specific gravity 0.39 ~ 0.55) as an example. As a result of the test, the hollow spheres must be at least 5 5 phr (phr: parts per hundred resin). Part by weight) in order to meet the demand of "Yoyogi" processing. In consideration of both processing and cost, due to the high unit price of this type of hollow ball, it should not be added too much. The preferred range is 55 phr ~ 1 110 phr. Make "Yoki" products with a specific gravity of about 0.7 to 0.9. In addition, if calcium carbonate with a specific gravity of 2. 6 5 is added in large amounts, it can also be made into a product that can be processed like "Yoki", but the ratio of calcium carbonate added is more than 200 phr, and the preferred range is 2 5 to 0 phr

Page 8 587981 Case No. 90129750 5. In the description of the invention (5), such "yoyogi" will not produce burrs during high-speed cutting. • The resins and additives described above are not suitable for direct kneading by general extruder because of the high volume content of the additives. Therefore, in the present invention, a mixing machine such as a ten-horsepower machine, a kneader, or a double roller can be used to plasticize the SBS and PS resins first, and then mix the mixture. Then, add the filler mixture into the mixture Evenly dipping with the shearing force of Yi Shi, you can take it out evenly after mixing. Put: inside ~ low mixer into the shape of the hydraulic mold t while still soft 100kg / cm2, preferably about 30 ~ 50kg / cm2 , Below the required product available. f /, take out the crotch, even in this way the mixture can also be placed in the extremely short L / D (in order to reduce #, L / D = 15 or less, the preferred range l / D = 1 below J cut rate), the extruder As bad as the structure of a hollow ball, the filler volume is required to prevent the e-shear from being too high to break (phase reverse), and it is impossible to form a wood substitute ~ phase reversal. [Example]: [Example 1] HIPS = 80g SBS 6 5 5 (Yingquan Chemical Industry Co., Ltd.) = 2〇Calcium Carbonate = 2 5 0g (2 50 0phr), volume fraction tectonic g ^, knife rate = 48 · 5% Double roller mixing temperature = 1 50 ° C Pressure of hot press = 50kg / cm2 Cooling temperature of hot press = 1 0 0 ° C or less Cooling time of hot press = 3 minutes 587981 Case No. 90129750 Explanation of the invention (6) The density of the finished product is 1.738 kg / cm3, hardness = shore D 79-82 [Example 2] HIPS = 70g SBS 655 = 30g calcium carbonate = 250g (250phr), volume fraction = 48 · 5% Processing conditions: Double-roller mixing temperature = 1 5 (TC hot press pressure = 50kg / cm2 Hot press cooling temperature = 1 0 0 ° C or less Hot press cooling time = 3 minutes Finished product density 1.741 kg / cm3, Hardness = Xiao D 78-82 [Example 3] HIPS = 60g SBS 6 5 5 = 4 0 g calcium carbonate = 2 5 0 g (2 50 0 phr), volume fraction = 48. 5% Processing conditions: double roller Kneading temperature = 1 50 ° C Pressure of hot press = 50kg / cm2 Cooling temperature of hot press = 1 0 0 ° C or less Cooling time of hot press = 3 minutes Finished product density 1.748 kg / c m3, hardness = Shore D 78 -80

Page 10 587981 Case No. 90129750 Amendment 5 、 Explanation of Invention (7) [Example 4] Volume fraction = 1. 6 5%, volume fraction = 3 8. 8 9% HIPS = 80g SBS 6 5 5 = 2 0 g calcium carbonate = 125g (125phr), hollow ball CG = 70g (70phr) Processing conditions: glass hollow ball double roller mixing temperature = 150 ° C hot press pressure = 50kg / cm2 cooling temperature of hot press = 1 Cooling time of the hot press below 0 0 ° C for two or three minutes ※ Hollow ball CG: Density = 0.75 g / cm (manufactured by P. A. industrial company) Particle size range = 10 to 200 mm, average = 90 mm Finished product density 1. 616 kg / cm3, hardness = Xiao D 77-79 [Example 5] HIPS = 80g SBS 655 = 20g 51.61% hollow ball PE-6000 = 80g (80phr), volume fraction processing conditions: double roller mixing temperature = 1 5 0 ° C Pressure of hot press = 50kg / cm2 Cooling temperature of hot press = 1 0 0 ° C or less Cooling time of hot press = 3 minutes ※ PE_6000: Density = 0 · 7 ~ 0.8g / cm3

Page 11 587981 Case No. 90129750 A3 Revision V. Description of the Invention (8) (Tokai Kogyo Co.LTD, manufactured by Tokai Industries Co., Ltd.) Particle size range = 10 ~ 120mm, average = 40mm Finished density 0 · 852 kg / cm3, hardness = Xiao's D 65-68 [Example 6] Η I PS = 8 0 g SBS 655 2 20g hollow ball PE-6000 = 110g (llOphr), volume fraction = 59.46% Processing conditions: double roller mixing temperature = 1 5 0 ° C pressure of hot press = 50kg / cm2 Cooling temperature of hot press = 1 0 0 ° C or less Cooling time of hot press = 3 minutes Product density 0.845 kg / c m3, hardness = Shore D 65-68 [Case 7] HIPS = 80g SBS 6 5 5 = 20g hollow ball PE-6000 = 110g (llOphr), volume fraction = 57.74% calcium carbonate = 20g (20phr), volume fraction = 2.97% Processing conditions: Double roller mixing temperature == 1 5 0 ° C pressure of hot press = 50kg / cm2 cooling temperature of hot press = 1 0 0 ° C or less cooling time of hot press = 3 minutes

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Claims (1)

587981 Case No. 90129750 Said that Luzheng replaced the present six. The scope of patent application1. A wood-based wood substitute, including: va) discontinuous thermoplastic base material, the thermoplastic base material contains a glass transfer point Thermoplastics with a glass transition temperature (Tg) higher than 60 ° C-impact-resistant polystyrene (Η I PS) and 5 to 100% by weight of thermoplastic elastomer-selected from styrene-butadiene Copolymer (SBS) based on the weight of the thermoplastic, and b) a continuous phase filler, selected from the group consisting of calcium carbonate and glass hollow spheres, and a combination thereof, wherein the filler is in the wood substitute The content is such that the volume percentage of the filler is between 48% and 60%, and the specific gravity of the wood is between 0.84 and 1.8. 2 · The Yoyogi in the scope of the patent application, the filler is calcium carbonate 3 · The Yoyogi in the scope of the patent application, the filler is a glass hollow ball, the glass hollow ball has The apparent specific gravity of K 7 ~ 0.8 and a particle size range between 10 and 120. 4 · For example, Yoyogi in the first patent application range, wherein the filler is a mixture of calcium carbonate and glass hollow spheres. , Wherein the glass hollow ball has a specific gravity between 0.7 and 0.8 and a particle size range between 10 and 120. 5. For example, the Yoyogi of the first scope of the patent application, wherein the resistant Impact Polystyrene Page 15 587981 _Case No. 90129750_Year_Month__ Sixth, the scope of application for patents Hene to styrene-butadiene copolymer (SBS) or the proportion range is HIPS: SBS or SEBS = 15 parts by weight · 85 parts by weight to 35 parts by weight and 65 parts by weight. 6 · The Yoyogi according to item 2 of the patent application scope, wherein the calcium carbonate is added at a ratio of more than 250 p h r (parts by weight per 100 parts by weight of resin). 7 · The Yoyogi as claimed in item 3 of the patent application range, wherein the glass hollow ball is added at a ratio of 5 5 p h r to 110 p h r (parts by weight per 100 parts by weight of resin). 8 · According to the Yoyogi in item 4 of the scope of the patent application, the calcium carbonate addition ratio is 20-2 0 0 phr (parts by weight per 100 parts by weight of resin) and the glass hollow ball is added between 3 5 phr ~ 1 10 phr (parts by weight per 100 parts by weight of resin). Page 16