阅读说明：本技术 一种餐盒片材用改性母粒及其制备方法 (Modified master batch for lunch box sheet and preparation method thereof ) 是由 李成 王鹏 熊松阳 于 2020-12-15 设计创作，主要内容包括：本发明的目的在于提供一种餐盒片材用改性母粒,这种母粒按重量份数包括以下物质：载体15-40份、分散剂5-8份、松节油10-15份、成核剂10-15份、硬酯酸镁1-3份,阻燃剂10-15份、偶联剂1-5份、抗氧化剂2-6份、抗静电剂3-4份；所述载体为生物降解聚酯,所述纳米填料为纳米无机粉体,表面通过包覆改性处理,粒径D50≤0.1um,本发明通过在母粒中添加阻燃剂、抗静电剂赋予餐盒片材很好的性能,使得可以放入微波炉中加热食物,然后通过各个组分的配合,使得本发明制得餐盒片材物理强度足够并且容易分解。(The invention aims to provide a modified master batch for a lunch box sheet, which comprises the following substances in parts by weight: 15-40 parts of carrier, 5-8 parts of dispersant, 10-15 parts of turpentine, 10-15 parts of nucleating agent, 1-3 parts of magnesium stearate, 10-15 parts of flame retardant, 1-5 parts of coupling agent, 2-6 parts of antioxidant and 3-4 parts of antistatic agent; the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, the particle size D50 is not more than 0.1um, the flame retardant and the antistatic agent are added into the master batch to endow the lunch box sheet with good performance, so that the lunch box sheet can be placed into a microwave oven to heat food, and then the prepared lunch box sheet has enough physical strength and is easy to decompose through the matching of all components.)

1. The modified master batch for the lunch box sheet is characterized by comprising the following substances in parts by weight: 15-40 parts of carrier, 5-8 parts of dispersant, 10-15 parts of turpentine, 10-15 parts of nucleating agent, 1-3 parts of magnesium stearate, 10-15 parts of flame retardant, 1-5 parts of coupling agent, 2-6 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

2. The masterbatch according to claim 1, wherein the masterbatch comprises the following substances in parts by weight: 20-30 parts of carrier, 5-6 parts of dispersant, 10-12 parts of turpentine, 12-14 parts of nucleating agent, 1-2 parts of sodium stearate, 12-15 parts of flame retardant, 2-4 parts of coupling agent, 3-5 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

3. The masterbatch according to claim 1, wherein the masterbatch comprises the following substances in parts by weight: 25 parts of carrier, 5 parts of dispersant, 11 parts of turpentine, 13 parts of nucleating agent, 2 parts of sodium stearate, 13 parts of flame retardant, 3 parts of coupling agent, 4 parts of antioxidant and 3 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

4. The concentrate of claim 1, wherein the dispersing agent is a mixture of butyl stearate and microcrystalline wax.

5. The masterbatch of claim 1, wherein the nucleating agent is a sorbitol nucleating agent.

6. The masterbatch according to claim 1, wherein the coupling agent is a silane coupling agent.

7. The concentrate of claim 1, wherein the antistatic agent is an alkali metal salt of an alkyl sulfonic acid or a dithiocarbamate.

8. A method of preparing a masterbatch according to any one of claims 1 to 7, comprising the steps of:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

Technical Field

The invention relates to the field of master batches, and particularly relates to a modified master batch for a lunch box sheet and a preparation method thereof.

Background

The master batch is named as plastic master batch, is a plastic processing aid developed in the 80 s of the 20 th century, and consists of excessive chemical aids, carrier resin, a dispersing agent and the like. In the plastic processing and forming process, in order to be convenient to operate, required auxiliaries, fillers and carrier resin are mixed and mixed firstly, and the particles are obtained through the processing processes of metering, mixing, melting, extruding, granulating and the like by using equipment such as an extruder. The limit of the auxiliary agent or the content of the filler in the master batch is several times to dozens of times higher than the required amount in the actual plastic product.

The disposable fast food box is changed from a foam lunch box to an environment-friendly lunch box, the original foam lunch box is not resistant to high temperature, and the manufacturing process causes damage to the environment and is eliminated, and the disposable fast food box is taken from plastic lunch boxes, paper lunch boxes, wood lunch boxes and the like. Among them, plastic is a mainstream material for manufacturing disposable snack boxes because of its characteristics of low toxicity, high melting point, strong plasticity, simple and convenient production, low relative cost, etc., and the existing snack boxes are difficult to consider degradability and thermal stability.

In order to solve the above problems, the inventors thought to increase the physical properties of the resulting lunch box by blending a degradable plastic with a filler material, and the mother particle for the lunch box sheet is a key to manufacturing a degradable and good physical property lunch box.

Disclosure of Invention

The present invention aims to solve at least one of the above problems,

in a first aspect, the invention provides a modified master batch for a lunch box sheet, wherein the master batch comprises the following substances in parts by weight: 15-40 parts of carrier, 5-8 parts of dispersant, 10-15 parts of turpentine, 10-15 parts of nucleating agent, 1-3 parts of magnesium stearate, 10-15 parts of flame retardant, 1-5 parts of coupling agent, 2-6 parts of antioxidant and 3-4 parts of antistatic agent; the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

Preferably, the master batch comprises the following substances in parts by weight: 20-30 parts of carrier, 5-6 parts of dispersant, 10-12 parts of turpentine, 12-14 parts of nucleating agent, 1-2 parts of sodium stearate, 12-15 parts of flame retardant, 2-4 parts of coupling agent, 3-5 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

Preferably, the master batch comprises the following substances in parts by weight: 25 parts of carrier, 5 parts of dispersant, 11 parts of turpentine, 13 parts of nucleating agent, 2 parts of sodium stearate, 13 parts of flame retardant, 3 parts of coupling agent, 4 parts of antioxidant and 3 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

Preferably, the dispersant is a mixture of butyl stearate and microcrystalline paraffin.

Preferably, the nucleating agent is a sorbitol nucleating agent.

Preferably, the coupling agent is a silane coupling agent.

Preferably, the antistatic agent is an alkali metal salt of an alkyl sulfonic acid or a dithiocarbamate.

In a second aspect, the invention provides a preparation method of modified master batch for a lunch box sheet, which comprises the following steps:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

Advantageous effects

According to the invention, the fire retardant and the antistatic agent are added into the master batch to endow the lunch box sheet with good performance, so that the lunch box sheet can be placed into a microwave oven to heat food, and then through the matching of the components, the lunch box sheet prepared by the method has enough physical strength and is easy to decompose.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The master batch comprises the following substances in parts by weight: 15-40 parts of carrier, 5-8 parts of dispersant, 10-15 parts of turpentine, 10-15 parts of nucleating agent, 1-3 parts of magnesium stearate, 10-15 parts of flame retardant, 1-5 parts of coupling agent, 2-6 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

A preparation method of modified master batches for lunch box sheets comprises the following steps:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

The dispersing agent is a mixture of butyl stearate and microcrystalline paraffin.

The nucleating agent is sorbitol nucleating agent.

The coupling agent is a silane coupling agent.

The antistatic agent is an alkali metal salt of an alkylsulfonic acid.

Example 2

The master batch comprises the following substances in parts by weight: 15-40 parts of carrier, 5-8 parts of dispersant, 10-15 parts of turpentine, 10-15 parts of nucleating agent, 1-3 parts of magnesium stearate, 10-15 parts of flame retardant, 1-5 parts of coupling agent, 2-6 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

A preparation method of modified master batches for lunch box sheets comprises the following steps:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

The dispersing agent is a mixture of butyl stearate and microcrystalline paraffin.

The nucleating agent is sorbitol nucleating agent.

The coupling agent is a silane coupling agent.

The antistatic agent is an alkali metal salt of an alkylsulfonic acid.

Example 3

The master batch comprises the following substances in parts by weight: 20-30 parts of carrier, 5-6 parts of dispersant, 10-12 parts of turpentine, 12-14 parts of nucleating agent, 1-2 parts of sodium stearate, 12-15 parts of flame retardant, 2-4 parts of coupling agent, 3-5 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

A preparation method of modified master batches for lunch box sheets comprises the following steps:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

The dispersing agent is a mixture of butyl stearate and microcrystalline paraffin.

The nucleating agent is sorbitol nucleating agent.

The coupling agent is a silane coupling agent.

The antistatic agent is an alkali metal salt of an alkylsulfonic acid.

Example 4

The master batch comprises the following substances in parts by weight: 20-30 parts of carrier, 5-6 parts of dispersant, 10-12 parts of turpentine, 12-14 parts of nucleating agent, 1-2 parts of sodium stearate, 12-15 parts of flame retardant, 2-4 parts of coupling agent, 3-5 parts of antioxidant and 3-4 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

A preparation method of modified master batches for lunch box sheets comprises the following steps:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

The dispersing agent is a mixture of butyl stearate and microcrystalline paraffin.

The nucleating agent is sorbitol nucleating agent.

The coupling agent is a silane coupling agent.

The antistatic agent is an alkali metal salt of an alkylsulfonic acid.

Example 5

The master batch comprises the following substances in parts by weight: 25 parts of carrier, 5 parts of dispersant, 11 parts of turpentine, 13 parts of nucleating agent, 2 parts of sodium stearate, 13 parts of flame retardant, 3 parts of coupling agent, 4 parts of antioxidant and 3 parts of antistatic agent;

the carrier is biodegradable polyester, the nano filler is nano inorganic powder, the surface of the nano filler is coated and modified, and the particle size D50 is less than or equal to 0.1 um.

A preparation method of modified master batches for lunch box sheets comprises the following steps:

1) mixing turpentine, water and a dispersant to obtain a mixture,

2) mixing the mixture obtained in the step 1) with a carrier, and adding water to obtain a mixed solution;

3) mixing the rest components according to the formula proportion and then mixing the mixture with the mixed solution obtained in the step 2) in a high-speed mixer for 5-8 minutes;

4) firstly plasticizing through a two-roller plasticator, then carrying out melt blending and extrusion granulation by adopting a double-screw extruder, controlling the temperature of the screw extruder to be 240-250 ℃ and the rotating speed of the screw extruder to be 300r/min in the process, and obtaining the modified master batch.

The dispersing agent is a mixture of butyl stearate and microcrystalline paraffin.

The nucleating agent is sorbitol nucleating agent.

The coupling agent is a silane coupling agent.

The antistatic agent is an alkali metal salt of an alkylsulfonic acid.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.