WO2014169450A1

WO2014169450A1 - Environmentally friendly composite particle and preparation method therefor

Info

Publication number: WO2014169450A1
Application number: PCT/CN2013/074316
Authority: WO
Inventors: 王德成; 姚丹; 刘俊豪; 夏开邦
Original assignee: 香港格林天使科技有限公司
Priority date: 2013-04-17
Filing date: 2013-04-17
Publication date: 2014-10-23

Abstract

An environmentally friendly composite particle and a preparation method therefor. Components of the environmentally friendly composite particle mainly comprise a resin, an inorganic powder, and a proper amount of an assistant, or can further comprise an organic material. The corresponding preparation method comprises the steps: drying the components, and then mixing and stirring the components in a heating temperature; and after full mixing, making a particle by means of vacuum kneading, so as to obtain an environmentally friendly composite particle. The environmentally friendly composite particles according to the present invention can be used to replace a PVC material.

Description

Environmentally friendly composite particle and preparation method thereof

Technical field

The invention relates to the technical field of materials, in particular to environmentally friendly composite particles and a preparation method thereof.

Background technique

Polyvinyl chloride (PVC) is a well-loved, popular and widely used synthetic material in the world today. Nowadays, the use of PVC materials in the world has reached a serious dependence. China is a major PVC importer and importer. At present, most of the toys and household general products are made of PVC, and PVC products can be found everywhere in daily life.

In recent years, studies have found that PVC products release toxic gases that are harmful to humans in the event of elevated temperatures. There are two reasons for its toxicity. One is the inherent safety hazard of vinyl chloride (VC) monomer in the synthesis of PVC. Second, PVC materials often need to be added with plasticizer during processing. The added plasticizer may seep out. Or gasification. Therefore, the products processed by PVC materials have certain risks. Accordingly, EU countries have already imposed restrictions on the import of PVC products.

As oil prices continue to rise and it is confirmed that PVC will release harmful gases when the temperature rises, it is necessary to develop appropriate new materials to replace traditional PVC materials.

Summary of the invention

According to an aspect of the present invention, an environmentally friendly composite particle comprising a resin, an inorganic powder, and an auxiliary agent is provided.

According to another aspect of the present invention, there is provided a method for preparing the environmentally friendly composite particle, comprising the steps of: drying various components including a resin, an inorganic powder and an auxiliary agent, and then performing mixing and stirring under heating; Kneading and granulating to obtain environmentally friendly composite particles.

The environmentally friendly composite particles according to the present invention can be widely used in production instead of PVC materials. The environmentally friendly composite particles in the present application may not contain a VC monomer, and the plasticizer may not be used in the components, so that the danger of using the PVC material can be overcome, and it is an ideal environment-friendly material for replacing the PVC material.

detailed description

Embodiments of the present invention provide an environmentally friendly composite particle, the components of the environmentally friendly composite particle mainly comprising a resin and an inorganic powder, supplemented with an appropriate amount of an auxiliary agent. The environmentally-friendly composite granule can be further processed by replacing the PVC material, and specifically, can be made into a sheet for printing, patterning, production of stationery, etc., and the environmentally-friendly composite granule can be used for producing blister or stamping. . The environmentally friendly composite granule according to the present invention can be used as an environmentally-friendly material, in addition to replacing the PVC material, and can further replace biodegradable materials such as PSM and PLA, and make general household articles and containers, such as trays, hotel disposable articles, Home appliance parts, etc.

The resin in the above-mentioned eco-friendly composite particles may be polyethylene (PE) and/or polypropylene (PP), that is, polyethylene or polypropylene may be used alone, or both components may be used at the same time. In some embodiments in accordance with the invention, the polypropylene may specifically select one or both of a PP homopolymer and a PP copolymer. The polyethylene may specifically be high density polyethylene (HDPE). One or more of high pressure low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and medium density polyethylene (MDPE).

The inorganic powder in the particulate component may be an inorganic powder or a plurality of inorganic powders. The inorganic powder may be selected from one or more of calcium carbonate, titanium dioxide, talc, kaolin, vermiculite powder, perlite, mica powder, quartz powder, and a diffusing agent. Depending on the inorganic powder selected, the number of powders may vary depending on the preparation of environmentally friendly composite particles. In one embodiment in accordance with the invention, the calcium carbonate powder has a mesh number of from about 1000 to about 1500 mesh. In another embodiment, the mesh number of titanium dioxide may be selected to be 3,000 mesh. The degree of pulverization of the powder is such that it is advantageous for sufficient mixing with the resin, and an excessively high number of powders causes an increase in cost. In one embodiment, the resin and inorganic powder used in the environmentally friendly composite particles are polyethylene and calcium carbonate, respectively. As a natural mineral of nature, calcium carbonate is environmentally friendly and non-toxic. It is widely distributed and easy to obtain. The use of calcium carbonate as a powder can effectively reduce the cost of the environmentally friendly composite particles and increase the hardness, specific gravity and stability of the powder. In another embodiment, the resin and inorganic powder used in the environmentally friendly composite particles are polyethylene and titanium dioxide, respectively. The granules can be further processed into a surface layer of three-layer co-extruded stone paper for furniture veneer, which contains titanium dioxide, and thus has the characteristics of whitening, light blocking, smooth surface and high hardness.

The environmentally-friendly composite granule includes one or more auxiliaries, and in one embodiment according to the present invention, the auxiliary comprises a coupling agent selected from a coupling agent, a compatibilizer (also referred to as a compatibilizer), and a slip agent ( It may also be referred to as one or more of a dispersing agent) and an antistatic agent. Further, the auxiliary agent may further include one or more selected from the group consisting of a flame retardant, an antioxidant, and a brightening agent. The following are some optional additives, including chlorate, titanate, polyethylene wax, polypropylene wax, diffusion oil, zinc stearate, calcium stearate, bright oil, environmentally friendly flame retardant. If coloring is required, a diffusing agent may be further added to the inorganic powder as an auxiliary agent to facilitate uniform coloration.

In the environmentally friendly composite particles according to the present invention, the weight percentage of the resin may be 15-80%, the weight percentage of the powder is 15-80%, and the specific gravity of the auxiliary agent is 2-5%. The ratio of powder to resin can be determined according to the requirements of the products produced, and is mainly determined according to the specific requirements of specific gravity and tensile strength. Those skilled in the art can make a ratio determination according to actual requirements and select different ratios of resin to powder.

The composition of the environmentally friendly composite particles according to the present invention may further comprise an organic material which may be selected from one of an elastomer such as an ethylene-octene copolymer (POE) or an ethylene-vinyl acetate copolymer (EVA) or Several. The weight percentage of the organic material is less than or equal to 10%.

According to an embodiment of the present invention, a method for preparing the above-mentioned environmentally friendly composite particles is further disclosed, which comprises the steps of: drying each component including a resin, an inorganic powder, an auxiliary agent, etc., and then performing mixing and stirring under heating; fully mixing After vacuum kneading and granulation, environmentally friendly composite particles are obtained. Specifically, it comprises: A. drying the resin, the inorganic powder and the auxiliary agent to a water content of less than 2%; B, mixing and stirring the resin, the inorganic powder and the auxiliary agent at 100-110 ° C, and the mixing order is first Adding an auxiliary agent to the inorganic powder, and adding the resin after the two are uniformly mixed; C, fully mixing, and then granulating by vacuum kneading to obtain an environmentally friendly composite particle. Wherein, when the auxiliary agent is added to the inorganic powder, the coupling agent is first added, and then other auxiliary agents are added.

For the environmentally friendly composite particles including organic materials in the composition, the organic material and the resin, the organic powder and the auxiliary agent may be dried in the step A of the above preparation method, and in the step B, first in the inorganic powder. Add the auxiliary agent, and then add the organic material and the resin to the stirring.

The invention will now be further described in detail by way of specific examples. In the following examples, the calcium carbonate used was Nanjing Omega calcium carbonate, and the polyethylene used was commercially available Saudi HTA-001 HD polyethylene, and the coupling agent used was 27 of Shenzhen Superior Changhao Technology Co., Ltd. # coupling agent, the antistatic agent used is 129# antistatic agent of Suzhou Jixin Trading Co., Ltd., and the compatibilizer used is WP-11 compatibilizer of Shanghai Jinshan Star Plastic Co., Ltd. The slip agent is ST-10B# slip agent of Shanghai Songya Chemical Co., Ltd. The flame retardant used is the inorganic flame retardant of Guangzhou Jiazhuo Trading Co., Ltd., and the titanium dioxide used is Dujiang R960 titanium dioxide. The polypropylene used is Yangzi Petrochemical F401 polypropylene. The brightener used is 363# brightener of Haimen Hualong Grease Additive Factory. The antioxidant used is Jinhai Yabao's AT-10# antioxidant. The EVA used is EVA of Dongguan Rongtai Packaging Materials Co., Ltd. The talc used is BHS-818# talcum powder of Quanzhou Xufeng Powder Co., Ltd., and the POE used is Exxon Mobil's 0201 POE.

Example 1

The environmentally friendly composite particles 1 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Calcium carbonate, 47.5%

Polyethylene, 47.5%

1.25% of coupling agent, antistatic agent, compatibilizer and slip agent

The specific preparation process is as follows:

1. The 1000-1500 mesh calcium carbonate powder is selected or the calcium carbonate is pulverized to 1000-1500 mesh, and the components in the above formulation are dried to a water content of less than 2%.

2. Put the calcium carbonate powder into the mixer and warm it at about 100~110 °C, and stir for 5~8 minutes.

3. The coupling agent will be added to the calcium carbonate powder first, and then the compatibilizer, the slip agent and the antistatic agent are respectively added to the calcium carbonate powder, and the mixture is fully stirred, and the set temperature is 100-110 ° C, and the mixture is stirred for about 5 minutes.

4. Add polyethylene and mix and stir for 5 minutes.

5. After vacuum kneading, the granulator is started to granulate, the strip is granulated by the discharge port, and dried again for about 30 minutes. After cooling, the environmentally friendly composite particles 1 are obtained, packaged, stored, and used.

The environmentally friendly composite granule 1 can be further processed into a sheet (rolling material), which can be used to make a thin inner packaging box or a tray type product such as a blister box or a cosmetic box using a blister mechanism.

Example 2

The environmentally friendly composite particles 2 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Calcium carbonate, 80%

Polyethylene, 15%

1.25% of coupling agent, antistatic agent, compatibilizer and slip agent

The preparation procedure was the same as in Example 1, and the environmentally friendly composite particles 2 were obtained.

Environmentally friendly composite particles 2, can be used for injection molding into plastic containers, disposable products, plastic toys, connecting screws and other products.

Example 3

The environmentally friendly composite particles 3 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Calcium carbonate, 15%

Polyethylene, 80%

1.25% of coupling agent, antistatic agent, compatibilizer and slip agent

The preparation procedure was the same as in Example 1, and environmentally friendly composite particles 3 were obtained.

The environmentally-friendly composite granule 3 can be used to replace the PVC to make the brighter and brighter printed-grade outer packaging box and cosmetic box.

Example 4

The environmentally friendly composite particles 4 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Titanium dioxide, 50%

Polyethylene, 45%

1% of coupling agent, antistatic agent, compatibilizer, slip agent and flame retardant

The preparation steps were the same as those in Example 1. The mesh size of the titanium dioxide powder in the preparation was 3000 mesh, and the environmentally friendly composite particles 4 were obtained.

The environmentally friendly composite granule 4 can be used for injection molding into hotel products such as a comb and a telephone casing.

The environmentally friendly composite particles 5 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Calcium carbonate, 47.5%

Polyethylene, 47.5%

The preparation procedure was the same as in Example 1, and environmentally friendly composite particles 5 were obtained.

The three-layer co-extrusion 5-roll calender is used to send the environmentally-friendly composite particles 4 as surface particles and environmentally-friendly composite particles 5 as intermediate particles to the extruder, and the particles are melted into a molten state, and after being discharged through the die, the calender rolls are pressed into The required thickness, using a mirror roll, and then corona treatment, static elimination, on-line thickness non-contact measurement and other processes, after processing is completed, to obtain three layers (surface layer - middle layer - surface layer) co-extruded stone paper.

Example 5

The environmentally friendly composite particles 6 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Calcium carbonate, 55%

Polyethylene, 21%

Polypropylene, 20%

1% slip agent, coupling agent, antistatic agent, compatibilizer, brightener, antioxidant, flame retardant 0.5% each

After the calcium carbonate powder and the auxiliary agent are uniformly mixed, polyethylene and polypropylene are added, and other preparation steps are basically the same as in the first embodiment, and the environmentally friendly composite particles 6 are obtained.

The environmentally friendly composite granules 6, which can be used for processing sheets (rolling materials) instead of PVC, to produce blister-grade packaging boxes (printable, fuel-spraying), prefer thicker blister packaging products, such as outer boxes or trays.

Example 6

The environmentally friendly composite particles 7 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Calcium carbonate, 49%

Polyethylene, 38%

EVA, 8%

2% slip agent, 1% of coupling agent, antistatic agent and compatibilizer

After the calcium carbonate powder and the auxiliary agent are uniformly mixed, polyethylene and EVA are added, and other preparation steps are basically the same as in the first embodiment, and the environmentally friendly composite particles 7 are obtained.

Environmentally friendly composite particles 7, can replace 95 degrees of soft PVC for processing all kinds of toys on the injection molding machine, such as: Spiderman.

Example 7

The environmentally friendly composite particles 8 were prepared according to the following formula (each component is based on the weight percentage of the composite particles):

Talc powder, 40%

Polyethylene, 25%

Polypropylene, 25%

POE, 5%

2% slip agent, 1% of coupling agent, antistatic agent and compatibilizer

The mesh number of talc is 1,250 mesh. After the talc powder and the auxiliary agent are uniformly mixed, polyethylene, polypropylene and POE are added, and other preparation steps are basically the same as in the first embodiment, and the environmentally friendly composite particles 8 are obtained.

Environmentally friendly composite granules 8 can replace sheet PVC, making all kinds of hard cards, such as hotel room cards, social security insurance cards.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the above specific embodiments may be modified according to the idea of the present invention.

Claims

An environmentally friendly composite granule characterized by comprising: a resin, an inorganic powder and an auxiliary.
The environmentally friendly composite particle according to claim 1, wherein the resin comprises polyethylene and/or polypropylene.
According to claim 1 The environmentally friendly composite particle characterized in that the inorganic powder is one or more selected from the group consisting of calcium carbonate, titanium dioxide, talc, kaolin, vermiculite powder, perlite, mica powder and quartz powder.
According to claim 1 The environmentally friendly composite particle characterized in that the auxiliary agent comprises one or more selected from the group consisting of a coupling agent, an antistatic agent, a compatibilizer, and a slip agent.
According to claim 4 The environmentally friendly composite particle, characterized in that the auxiliary agent further comprises one or more selected from the group consisting of a flame retardant, an antioxidant and a brightener.
The environmentally friendly composite particle according to any one of claims 1 to 5, wherein the resin is 15-80% by weight The inorganic powder has a weight percentage of 15-80%, and the auxiliary agent has a weight percentage of 2-5%.
The environmentally friendly composite particle according to claim 6, wherein the component further comprises an organic material selected from the group consisting of ethylene-octene copolymer and ethylene- One or two of the vinyl acetate copolymers.
The environmentally friendly composite particle according to claim 7, wherein the organic material has a weight percentage of less than or equal to 10%.
Claim 1 The preparation method of the environmentally-friendly composite granules comprises the steps of: after drying the components, mixing and stirring under heating conditions, the components include a resin, an inorganic powder and an auxiliary agent; Vacuum kneading granulation to obtain environmentally friendly composite particles.
The preparation method according to claim 9, wherein the component further comprises an organic material selected from the group consisting of ethylene-octene copolymer and ethylene- One or two of the vinyl acetate copolymers.