JP-7856701-B2 - Polyester compositions and their products

Inventors

• 袁 敬堯
• 曹 俊哲
• 劉 騏▲宣▼

Assignees

• 南亞塑膠工業股▲分▼有限公司

Dates

Publication Date

20260511

Application Date

20240726

Priority Date

20240611

Claims (7)

1. A polyester composition, The resin (A) has an intrinsic viscosity of 0.6 dL/g to 0.85 dL/g and includes a virgin polyethylene terephthalate resin, recycled polyethylene terephthalate, or a combination thereof. A fiber reinforcement material (B) comprising glass fibers, carbon fibers, titanium fibers, boron fibers, or a combination thereof, which are short fibers with a diameter of 10 micrometers and a length of 4.5 micrometers, An inorganic reinforcing material (C) containing talc powder, calcium carbonate, or a combination thereof, Nuclear agent (D), It contains a strengthening agent (E) and With a total amount of 100 parts by weight of the polyester composition, the amount of resin (A) is 60 to 80 parts by weight, the amount of fiber reinforcing material (B) is 5 to 20 parts by weight, the amount of inorganic reinforcing material (C) is 5 to 20 parts by weight, the amount of nucleating agent (D) is 2.5 to 10 parts by weight, and the amount of reinforcing agent (E) is 0.3 to 2 parts by weight. Polyester composition.
2. The nucleating agent (D) comprises at least one organic nucleating agent. The polyester composition according to claim 1.
3. The reinforcing agent (E) includes ethylene-methyl acrylate-glycidyl methacrylate ternary copolymer, glycidyl methacrylate grafted polyolefin elastomer, styrene-ethylene/butylene-styrene copolymer, maleic anhydride grafted styrene-ethylene/butylene-styrene block copolymer, methyl methacrylate-butadiene-styrene, or a combination thereof. The polyester composition according to claim 1.
4. Lubricant (F) It further includes, The lubricant (F) includes stearates, polyethylene wax, siloxane modifiers, fluororesins, or combinations thereof. The polyester composition according to claim 1.
5. Antioxidant (G) It further includes, The antioxidant (G) includes a hindered phenol antioxidant, a phenol antioxidant, a phosphite ester antioxidant, or a combination thereof. The polyester composition according to claim 1.
6. Further comprising a lubricant (F), an antioxidant (G), or a combination thereof, With a total amount of the polyester composition being 100 parts by weight, the amount of the lubricant (F) is 0.1 to 2 parts by weight, and the amount of the antioxidant (G) is 0.2 to 2 parts by weight. The polyester composition according to claim 1.
7. A polyester composition according to any one of claims 1 to 6 is used as engineering plastic granules to produce a product. product.

Description

This invention relates to polyester compositions, and more particularly to polyester compositions and products thereof that can be processed under low-temperature conditions. Most tableware commonly seen today is made of melamine. However, when melamine tableware is damaged or broken, it can release toxins when exposed to heat, which can enter the human body and damage organs. Furthermore, polyester tableware, also commonly seen today, is made from polyethylene terephthalate (PET) with added nucleating agents. Polyethylene terephthalate containing nucleating agents requires injection molding at high mold temperatures (e.g., 130°C) or injection molding at low mold temperatures followed by post-crystallization. Moreover, the heat resistance of the manufactured tableware is only 150°C. Therefore, improving the production efficiency and heat resistance of non-toxic products is an urgent issue for those skilled in the art. Embodiments of the present invention are described in detail below. The details of the embodiments provided are illustrative and do not limit the scope of protection of the present invention. Those skilled in the art may modify or alter these details based on the requirements of their actual implementation. Furthermore, descriptions of well-known apparatus, methods, and materials may be omitted to avoid obscuring the various principles of the present invention. In this specification, a range expressed as "approximately" one specific value to "approximately" another specific value may also be expressed directly as one specific value and/or another specific value. When this range is expressed, the other embodiment encompasses the range from that one specific value to/or the other specific value. Similarly, when the preceding "approximately" is used to indicate that a value is an approximation, it should be understood that the specific value forms another embodiment. Furthermore, it should be understood that the endpoints of each range are either clearly related to or independent of the other endpoint. In this specification, non-limiting terms (e.g., possible, may be, e.g., or other similar terms) are optional but not required practices, including addition or presence. Unless otherwise defined, terms used herein (including technical and scientific terms) have the same meaning as those generally understood by those skilled in the art. Furthermore, terms (as defined in commonly used dictionaries) should be understood to have the same meaning as those in the relevant art, and should not be interpreted in this way unless explicitly defined as idealized or overly formal. <Polyester composition> The present invention provides a polyester composition comprising a resin (A), a fiber reinforcing material (B), an inorganic reinforcing material (C), a nucleating agent (D), and a strengthening agent (E). The polyester composition of the present invention may further contain, as necessary, a lubricant (F), an antioxidant (G), or other suitable additives. Each of the above-mentioned components will be described in detail below. Resin (A) The intrinsic viscosity of resin (A) is 0.6 dL/g to 0.85 dL/g, preferably 0.6 dL/g to 0.76 dL/g. If the intrinsic viscosity of resin (A) is less than 0.6 dL/g, it may reduce the impact resistance of the polyester composition, potentially leading to insufficient strength and/or cracking problems in the polyester composition or its products. If the intrinsic viscosity of resin (A) is higher than 0.85 dL/g, it may increase the melt flow index (MI) of the polyester composition, which may reduce the fluidity of the polyester composition and make it difficult to apply in subsequent processing steps. There are no particular restrictions on the structure/composition of resin (A), and an appropriate resin may be selected as needed. For example, resin (A) may include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or other suitable resins. Polyethylene terephthalate may include virgin polyethylene terephthalate resin, recycled polyethylene terephthalate, or a combination thereof. Sources of recycled polyethylene terephthalate may include, but are not limited to, recycled packaging granules, recycled film granules, recycled fabric granules, industrial recycled environmentally friendly recycled polyester granules, or other suitable polyethylene terephthalate products to meet the needs of introducing recycled materials. Recycled packaging granules may include recycled bottle granules (e.g., recycled PET bottle granules), recycled tray granules, or other suitable packaging products. With a total amount of polyester composition of 100 parts by weight, the amount of resin (A) is 60 to 80 parts by weight, preferably 65 to 72 parts by weight. Fiber reinforcement material (B) There are no particular restrictions on the fiber reinforcement (B), and an appropriate fiber reinforcement may be selected as needed. In this embodiment, the fiber reinforcement (B) may include glass fi