TWM587172U - Composite plastic alloy structure - Google Patents

Abstract

A composite plastic alloy structure includes a plastic including a polyethylene (PE) molecular chain, a compatibilizer molecular chain, and a polyethylene terephthalate (PET) molecular chain. The polymer molecular chain and the polyethylene terephthalate molecular chain are entangled with each other to form a rope shape; and a fiber material including a cloth and a binding agent, the binding agent is bound to the cloth and plastic, and the plastic-coated fiber material forms a Composite plastic alloy structure. In this creation, the molecular chains of polyethylene and polyethylene terephthalate are entangled with each other to form a plastic by using a compatibilizer to enhance the mechanical properties. Plastic can be used alone in an injection molding machine to create a variety of plastic life Supplies. This creation can be used to make plastic wood and other products.

Description

Composite plastic alloy structure

This creation relates to a plastic structure, particularly a composite plastic alloy structure in which the molecular chains of polyethylene (PE) and polyethylene terephthalate (PET) are entangled with each other and contain a fiber material with a compatibilizer.

Plastic alloy is a high-performance new material obtained by physical blending or chemical grafting. It can be widely used in automotive, electronics, precision instruments, office equipment, packaging materials, building materials and other fields. It can improve or enhance the performance of existing plastics and reduce costs. It has become one of the most active varieties in the plastics industry and has grown very rapidly.

Polyethylene (PE) is a versatile plastic that comes in many forms including high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and metallocene-catalyzed synthesis developed in recent years. Polyethylene (mPE). Because of its many varieties and low prices, it has good toughness, processing properties, rheological properties, water resistance, etc. and is used to make various film products and plastic parts. However, PE also has problems such as poor mechanical strength, heat resistance, and air tightness.

Polyethylene terephthalate (PET) is mainly used in synthetic fibers, biaxially stretched films, and hollow containers. Because of its low price, PET has excellent abrasion resistance, heat resistance, chemical resistance, electrical insulation, molding dimensional stability, and high mechanical strength. Therefore, PET was widely used as an engineering plastic in the 1960s. PET for engineering plastics has excellent comprehensive performance and low price, which is very competitive compared with other general engineering plastics. PET molecules have rigid groups on the main chain, so their heat resistance is very high, and because of the high symmetry of the molecular chains, their electrical insulation properties are also very good. But PET also has a crystallization rate. Slowness, difficulty in molding and processing, high mold temperature requirements, long molding cycle, poor impact strength, large water absorption and other shortcomings have greatly limited its application scope.

Because PE and PET have many properties that can complement each other, if PE and PET are mixed into a plastic alloy, the performance of PE and PET can be improved, and new uses of plastic recycled materials can be provided. However, PE is a non-polar polymer, and PET is a polar polymer, so the two are poorly compatible. Therefore, to improve the performance of PE / PET alloys, the compatibility must be improved. Malay is mainly used in the conventional methods. Polypropylene grafts of functional monomers such as anhydride (MAH), glycidyl methacrylate (GMA), etc., use the reaction of these functional monomers with the terminal hydroxyl or carboxyl group of PET to achieve the effect of increasing the compatibility between PE and PET However, the above-mentioned grafts and modification methods often have defects such as low grafting rate and severe degradation of PE, which further affect their effects. There needs to be a better way to help polyethylene (PE) and polyethylene terephthalate (PET) together as a plastic alloy material.

In view of this, the author has accumulated years of research in related fields and practical experience, and specially created a composite plastic alloy structure to improve the lack of the above-mentioned conventional techniques.

The main purpose of this creation is to provide a composite plastic alloy structure, which can intertwine the molecular chains of polyethylene (PE) and polyethylene terephthalate (PET) into a plastic alloy material through a compatibilizer. There is no need to use chemical graft monomers and blend with a fiber material to increase strength.

In order to achieve the above purpose, the composite plastic alloy structure of the present invention includes a plastic including a polyethylene (PE) molecular chain, a compatibilizer molecular chain, and a polyethylene terephthalate (PET) molecular chain. , Polyethylene molecular chain, compatibilizer molecular chain and polyethylene terephthalate molecular chain are entangled with each other to form a rope shape; and a fiber material, which includes a cloth and a binding agent, the binding agent is bound to the cloth and plastic, The plastic-coated fiber material forms a composite plastic alloy structure. In this creation, the molecular chain of polyethylene and polyethylene terephthalate is entangled with each other through a compatibilizer to form a composite plastic alloy, which enhances mechanical properties. Quality, the plastic can also be directly processed and used in injection molding machines to produce a variety of plastic daily necessities, foam extrusion, and composite plastic alloy materials can be used to extrude plastic wood and other products.

When the plastic is used alone for injection molding, the mixing ratio is preferably such that the weight percentage of polyethylene (PE) is less than the weight percentage of polyethylene terephthalate (PET).

The preferred mixing ratio of the composite plastic alloy material is that the weight percentage of polyethylene (PE) is greater than the weight percentage of polyethylene terephthalate (PET).

When this creation is made into plastic wood, an outer layer can be preferably added to increase the service life.

In order to clearly and fully disclose this creation, the illustrations of the preferred implementations are listed, and the implementation manners are described in detail below.

A‧‧‧ polyethylene molecular chain

B‧‧‧Polyethylene terephthalate molecular chain

C‧‧‧ compatibilizer molecular chain

D‧‧‧ rope-like molecular chain

E‧‧‧Plastic

F‧‧‧Fiber material

1‧‧‧ Blending steps

2‧‧‧Processing steps

1A‧‧‧ Blending steps

2A‧‧‧Processing steps

3‧‧‧ core material

4‧‧‧ Outer

The first picture is a diagram of the creation.

The second picture is the manufacturing flow chart of the created plastic.

The third picture is the manufacturing flow chart of the creation.

The fourth picture is a schematic diagram of the creation of plastic wood.

Please refer to the first to third figures to reveal the drawings of the embodiment of the creation. The above-mentioned drawings explain the composite plastic alloy structure of the creation, which includes a plastic E, which includes a polyethylene (PE) molecular chain A. , A compatibilizer molecular chain C and a polyethylene terephthalate (PET) molecular chain B, polyethylene molecular chain A, compatibilizer molecular chain C and polyethylene terephthalate molecular chain B each other Twine to form a rope-like molecular chain D. By interweaving polyethylene molecular chain A, compatibilizer molecular chain C and polyethylene terephthalate molecular chain B with each other, polyethylene and polyethylene terephthalate can be made without using a chemical grafting monomer. Ester common Fusion into a plastic E; and a fiber material F, which includes a cloth and a binding agent, the binding agent is combined with the cloth and the plastic E, and the plastic E covers the fiber material F to form a composite plastic alloy structure.

The second figure reveals the flow chart of the production of the plastic E of the present invention, which includes a mixing step 1, injecting polyethylene (PE), polyethylene terephthalate (PET), and a compatibilizer into a high-speed mixer Mix for 10 to 30 minutes to form a mixture; and a processing step 2, inject the mixture into a single-screw or twin-screw extruder with an aspect ratio for melt blending. The melting temperature is controlled at 170 ° C to 290 ° C and the screw speed is 120. ~ 400 rpm, the compatibilizer entangles the molecules of polyethylene and polyethylene terephthalate with each other, showing a state similar to a ponytail. A polyethylene, polyethylene terephthalate blended plastic is obtained. The first mixture of E. After the first mixture passes through a single-screw or twin-screw extruder with an aspect ratio, it is then extruded, die-cut or drawn, cooled, air-dried, pelletized, and dried to obtain plastic E. The pellets can be used in injection molding machines to make various plastic daily necessities, such as chairs, traffic cones, racks, etc .; when using plastic daily necessities produced by injection molding, the preferred weight percentage of plastic E is poly. The weight percentage of ethylene (PE) is less than that of polyterephthalic acid The percentage by weight ratio of diester (PET) is.

The third figure discloses the manufacturing flow chart of this creation. The manufacturing step includes a mixing step 1A, mixing a pulverized cloth with a binding agent and heating up to the melting point of the binding agent, so that the binding agent melts and covers the pulverized cloth. A fiber material F is formed, wherein the binding agent is modified from a hydrophobic polymer modified starch or a hydrophilic material modified polyolefin, and the cloth includes at least one of polyester or cotton; and a processing step 2A, the fiber material F and The aforementioned particles of plastic E are kneaded to obtain a second mixture of a composite plastic alloy structure, and the second mixture is pressed to produce a plastic-wood finished product of the composite plastic alloy structure. The cloth is covered with plastic E because of the bonding agent, which increases the strength of the composite plastic alloy structure.

Based on the weight percentage of the composite plastic alloy material composition being 100 wt%, the content of the cloth is 20-60 wt%, and the content of the plastic E is 40-80 wt%. The preferred mixing ratio of the composite plastic alloy material is that the weight percentage of polyethylene (PE) is greater than the weight percentage of polyethylene terephthalate (PET).

In the fourth figure, the composite plastic alloy structure of this creation can be used as the core material 3 of a plastic-wood product, and an outer layer 4 is further added. The outer layer 4 covers the core material 3, and the constituent material of the outer layer 4 includes hydrophilicity. Modified polyolefin or a polymer blend containing a hydrophilic modified polyester. By selecting the composition of the outer layer 4, the core material 3 and the outer layer 4 can have excellent bonding, and the overall strength and durability of the WPC product can be increased. In this way, the plastic wood products made by the composite plastic alloy structure created by this creation can be used for outdoor or indoor decoration and building materials. For example, it can be used for indoor imitation wood floor tiles, imitation wood decorative patches, or outdoor landscaping and railings. And stairs are not particularly limited.

In the production of WPC products, the second mixture of the aforementioned composite plastic alloy structure and the material of the outer layer 4 of a polymer blend containing a hydrophilic modified polyolefin or a polymer containing a hydrophilic modified polyester may be prepared. , Extruding the two in a co-extrusion manner can obtain a WPC product as shown in the fourth figure.

However, the above is only a preferred embodiment of this creation. When it cannot be used to limit the scope of this creation, all changes and modifications obvious to those skilled in the industry should be deemed not to be inconsistent. The essence of this creation.

Claims (3)

A composite plastic alloy structure includes: a plastic including a polyethylene (PE) molecular chain, a compatibilizer molecular chain, and a polyethylene terephthalate (PET) molecular chain; the polyethylene molecular chain 1. The compatibilizer molecular chain and the polyethylene terephthalate molecular chain are entangled with each other to form a rope-like shape; and a fiber material including a cloth and a binding agent, the binding agent is combined with the cloth and the plastic, The plastic covers the fibrous material. The composite plastic alloy structure described in item 1 of the patent application range, wherein the weight percentage of polyethylene (PE) contained in the plastic is greater than the weight percentage of polyethylene terephthalate (PET). The composite plastic alloy structure described in item 1 of the patent application scope further includes an outer layer that covers the plastic and the fiber material.