TWI660991B - Plating high density plastic - Google Patents

Abstract

An electroplatable high specific gravity plastic, which contains cerium oxide, and at least one of polyphenylene sulfide (PPS) and high rigidity nylon (MXD6), wherein the polyphenylene sulfide and high rigidity nylon are The finished article can be plated, the metal layer can be plated to make it metallic, and the polyphenylene sulfide can make the article have a crisp sound like a metal collision when it collides; cerium oxide can increase the specific gravity of high specific gravity plastic and make The characteristics of hard material with high specific gravity plastic have the advantages of folding resistance, scratch resistance and low water absorption, which not only increases the application range of high specific gravity plastic products, but also increases its value.

Description

Plating high density plastic

The invention relates to plastics; in particular, it refers to a high specific gravity plastic.

Plastic products have the advantages of low cost and mass production, and they play an indispensable role in modern society.

Although plastic products are more convenient to manufacture than metal or wood products, because plastics have the disadvantages of low specific gravity and small support force, the range of applications is still very limited. Take the support frame as an example. Because of the doubt of insufficient support force, the support frame made of plastic is only used to hold small objects. In addition, when the support frame must carry a heavy TV, in order to make the TV It is close to the ground with the center of gravity of the support frame to achieve a stable effect. Most of the material of the support frame will use metal or wood with a higher specific gravity instead of plastic.

In addition, the hardness of plastic products is low, so they are easily deformed by force and even scratches on the surface. Therefore, items that must withstand large external forces or require precise assembly, such as Palin, must be resistant to drop and scratch. Special items, such as bathroom equipment, are not suitable for plastic.

In addition, due to the light weight of plastic products, people often feel cheap and low-quality. Therefore, even if the plastic products are refined, consumers may not pay for them and choose metal products. No change in plastic products can increase their value.

In view of this, the object of the present invention is to provide an electroplatable high specific gravity plastic which has the characteristics of high specific gravity and hard texture. It can be electroplated to make its appearance shiny with metal, and it also has a crisp sound like metal collision when it collides. The articles produced by it have a wide range of applications.

In order to achieve the above object, the present invention provides an electroplatable high-specific gravity plastic, which contains cerium oxide, and at least one of polyphenylene sulfide (PPS) and high-rigidity nylon MXD6.

The effect of the present invention is that polyphenylene sulfide and high rigidity nylon can make articles made of high specific gravity plastics plateable, the metal layer can be plated to have metallic luster, and the polyphenylene sulfide has the following properties when the articles collide. Crisp sound like metal collision; cerium oxide can increase the specific gravity of high specific gravity plastic and make the material made of high specific gravity hard and has the characteristics of anti-folding and scratch resistance. It not only increases the high specific gravity plastic products. The scope of application also enhances its value.

The electroplatable high specific gravity plastic of a preferred embodiment of the present invention includes cerium oxide (CeO ₂ ), and at least one of polyphenylene sulfide (PPS) and high rigidity nylon (MXD6). In this embodiment, The average particle diameter of cerium oxide is 0.2 to 40 μm, but it is not limited thereto. At least one of cerium oxide and polyphenylene sulfide and high rigidity nylon (MXD6) is mixed in advance by a mixing mixer, and then put into an injection molding machine, and the high specific gravity plastic is injected into a mold to form a specific shape . In addition, because the polyphenylene sulfide is white, it is possible to stir the colorant together with the polyphenylene sulfide and cerium oxide before injection molding to make objects of different colors.

When an article made of polyphenylene sulfide (or high rigidity nylon) and cerium oxide is used as a plastic raw material during collision, because of the material characteristics of polyphenylene sulfide (or high rigidity nylon), the articles made of it will emit as The crisp sound when metals collide, and the cerium oxide is a harder material, so it can resonate with polyphenylene sulfide (or high rigidity nylon) to strengthen the crisp sound.

In addition, due to the material properties of polyphenylene sulfide and high-rigidity nylon, articles made with them have electroplatability. After the article is electroplated and its surface is composed of a metal layer (such as an aluminum layer), the article can have a metallic luster, and its appearance is almost the same as that of a metal product, thereby achieving the effect of increasing the value in the mind of consumers.

Large molecular weight cerium oxide can increase the specific gravity of plastics. Therefore, compared with ordinary plastics, high specific gravity plastics have a heavier weight and a harder texture. They not only provide better support, but also better scratch resistance. The applicable range is also wider. Taking the support frame as an example, but not limited to this, the support frames made of conventional plastics can only be used for lightweight objects, such as mobile phones and stationery, while large and heavy objects, such as televisions, If it is placed on a support frame made of conventional plastic, not only will there be doubts about insufficient support force, but also the overall center of gravity of the support frame and the TV is too high due to the light weight of the plastic support frame, which will affect the stability. Shake slightly and dump. The support frame made of the above-mentioned high specific gravity plastic not only has better support force, but also because of its heavier weight (compared with the case of conventional support frame made of plastic with the same volume), it can make televisions and other objects and support The overall center of gravity of the frame moves toward the support frame and approaches the ground to achieve the effect of improving the overall stability.

For example, all articles that can be produced by injection molding can be made of electroplated high specific gravity plastic. In addition, electroplatable high-specific gravity plastic products can not only replace general plastic products, but also have the characteristics of hard texture, resistance to deformation and high specific gravity, making electroplatable high-specific gravity plastics more useful. The production of general plastic products is an area that has never been used, such as making into a forest, even musical instruments, such as: Ocarina, clarinet, etc.

Take bathroom equipment (such as shower head) as another example. In order to have both texture and impact resistance, general bathroom equipment is mostly made of metal materials. However, the bathroom equipment has a complicated structure and a large number of parts. If it is made of metal materials, it requires complicated processing steps, including cutting , Grinding, polishing, etc., and as the complexity of the component structure increases, the processing difficulty also increases, which not only significantly increases the production cost, but also lengthens the processing time.

In contrast, if the bathroom equipment is made of high specific gravity plastic, once the mold is made, the injection molding technology can be produced in large quantities and quickly without additional processing steps; even if the part structure is complicated, (compared to metal processing) injection molding is required. The technical difficulty to overcome is relatively simple.

Polyphenylene sulfide and high rigidity nylon have the characteristics of non-hygroscopic and low hygroscopicity, respectively. Therefore, high specific gravity plastic can be made into a rear-illuminated rotor. The rotor does not swell due to water absorption, so it can have a long Service life; In addition, high rigidity nylon has the advantage of low thermal expansion coefficient, so it includes objects made of high specific gravity plastics with high rigidity nylon, such as hot water pipes, three-way pipes for water heaters, etc., which can be used in high temperature environments. It is not easy to deform and has stable size.

The electroplatable high specific gravity plastic can not only make objects with high specific gravity, heavy weight, and hard texture, but also has the appearance of metal texture. It also has the crisp sound of metal collision during collision, which can almost replace metal products. In addition, the articles that can be plated with high specific gravity plastics have both the advantages of rapid and mass production, which makes them even better than metal processing.

The electroplatable high specific gravity plastic increases the specific gravity by cerium oxide. In other words, the higher the proportion of cerium oxide in the weight of the plastic, the greater the specific gravity of the plastic. Maker-to-manufacture At this time, the specific gravity of plastic can be adjusted by adjusting the ratio of polyphenylene sulfide (or high rigidity nylon) and cerium oxide.

Please refer to Tables 1 and 2 below to reveal the effects of polyphenylene sulfide and cerium oxide on the physical properties of the corresponding high specific gravity plastics at different weight ratios.

Please refer to Tables 3 and 4 below to reveal the impact of high rigidity nylon and cerium oxide on the physical properties of corresponding high specific gravity plastics at different weight ratios.

Table 3. Weight percentage of high rigidity nylon and cerium oxide in each product

Because cerium oxide is more expensive, you can add either 5-10% zinc oxide (ZnO) and 5-10% barium sulfate (BaSO ₄ ), or both, so that the plastic can maintain a high specific gravity. The characteristics can also achieve the effect of reducing costs.

The above descriptions are only the preferred and feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of patent application should be included in the patent scope of the present invention.

Claims (18)

An electroplatable high specific gravity plastic, which contains cerium oxide, and at least one of polyphenylene sulfide (PPS) and high rigidity nylon (MXD6), wherein the above cerium oxide accounts for the weight ratio of the electroplatable high specific gravity plastic. It is 20% ~ 80%. The electroplatable high specific gravity plastic according to claim 1, wherein the high specific gravity plastic has a tensile strength of 652 to 1100 kg / cm ² as measured according to ASTM D638. The electroplatable high specific gravity plastic according to claim 1, wherein the high specific gravity plastic has an elongation of 0.2 to 5% as measured according to ASTM D640. The electroplatable high specific gravity plastic according to claim 1, wherein the high specific gravity plastic has a flexural strength of 772 to 1600 kg / cm ² as measured according to ASTM D790. The electroplatable high specific gravity plastic according to claim 1, wherein the high specific gravity plastic has a flexural modulus of 40,500 to 169,000 kg / cm ² as measured according to ASTM D790. The electroplatable high specific gravity plastic as described in claim 1, wherein the specific gravity of the high specific gravity plastic is 1.28 to 3.73 g / cm ³ as measured according to ASTM D792. The electroplatable high specific gravity plastic according to claim 1, wherein the high specific gravity plastic has a shrinkage ratio of 0.3 to 0.69 cm / cm as measured according to ASTM D955. The electroplatable high specific gravity plastic as described in claim 1, wherein the pencil hardness of the high specific gravity plastic is HB ~ 3H measured according to ASTM D2240. The electroplatable high specific gravity plastic according to claim 1, wherein at least one of the above polyphenylene sulfide and high rigidity nylon accounts for 20% to 80% by weight of the electroplatable high specific gravity plastic. The electroplatable high specific gravity plastic according to claim 1, wherein the cerium oxide accounts for 40% to 80% by weight of the electroplatable high specific gravity plastic. The electroplatable high specific gravity plastic according to claim 10, wherein the high specific gravity plastic has a tensile strength of 700 to 857 kg / cm ² as measured according to ASTM D638. The electroplatable high specific gravity plastic according to claim 10, wherein the high specific gravity plastic has an elongation of 0.8 to 3% as measured according to ASTM D640. The electroplatable high specific gravity plastic according to claim 10, wherein the high specific gravity plastic has a flexural modulus of 51,000 to 169,000 kg / cm ² measured according to ASTM D790. The electroplatable high specific gravity plastic according to claim 10, wherein the specific gravity of the high specific gravity plastic is 1.65 to 3.73 g / cm ³ as measured according to ASTM D792. The electroplatable high specific gravity plastic according to claim 3, wherein at least one of the above polyphenylene sulfide and high rigidity nylon (MXD6) accounts for 20% to 60% by weight of the electroplatable high specific gravity plastic. . The electroplatable high specific gravity plastic according to one of claims 1 to 15, further comprising at least one of zinc oxide and barium sulfate. The electroplatable high specific gravity plastic according to one of claims 1 to 15, wherein the average particle diameter of the cerium oxide is 0.2 to 40 μm. The electroplatable high specific gravity plastic as described in claim 1, comprising a metal plating layer constituting a surface thereof.