CN109929187B

CN109929187B - Special master batch for HIPS (high impact polystyrene) plate for refrigerator liner

Info

Publication number: CN109929187B
Application number: CN201910297525.9A
Authority: CN
Inventors: 彭俊东
Original assignee: Nanjing Yunchang Polymer Material Co ltd
Current assignee: Nanjing Yunchang Polymer Material Co ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2022-04-26
Anticipated expiration: 2039-04-15
Also published as: CN109929187A

Abstract

The invention discloses a special master batch for HIPS (high impact polystyrene) plates for refrigerator liners, which is prepared from the following raw materials in parts by weight: 21-27 parts of polypropylene, 48-58 parts of rutile titanium dioxide, 20-24 parts of precipitated barium sulfate, 0.4-0.6 part of polydimethylsiloxane and 0.4-0.6 part of lubricant. The precipitated barium sulfate and the polydimethylsiloxane are simultaneously introduced into the master batch, so that the surface glossiness of the HIPS plate can be remarkably improved, and the HIPS plate is more favorable for application to the refrigerator liner.

Description

Special master batch for HIPS (high impact polystyrene) plate for refrigerator liner

Technical Field

The invention relates to modified master batches of HIPS plates, in particular to a special master batch of HIPS plates for refrigerator liners.

Background

The inner container of the refrigerator, namely the inner wall of the refrigerator body of the refrigerator, has good adaptability to temperature, does not deform in a high-temperature environment, and keeps the flatness of the inner wall of the refrigerator under a low-temperature condition, and the inner container of the refrigerator mainly adopts ABS, HIPS and other materials. The HIPS material has the advantages of low cost, simple process and wide application, is mainly applied to food packaging, is suitable for food contact, is used as a material of an inner container of a refrigerator, is extruded into a plate by raw materials, is subjected to plastic suction by using a plate with a proper size to form a specified shape and appearance, is easy to shrink and warp and deform in the plastic suction process because the inner container of the refrigerator is irregular, and is traditionally reduced in shrinkage rate by adding inorganic fillers (such as barium sulfate, calcium carbonate, talcum powder and the like), but the surface gloss can be influenced after the fillers are added.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide the special master batch which can ensure that the surface gloss of the HIPS plate after being formed into the refrigerator liner by plastic suction is good.

The technical scheme is as follows: the invention discloses a special master batch for a HIPS (high impact polystyrene) plate for a refrigerator liner, which is prepared from the following raw materials in parts by weight: 21-27 parts of polypropylene, 48-58 parts of rutile titanium dioxide, 20-24 parts of precipitated barium sulfate, 0.4-0.6 part of polydimethylsiloxane and 0.4-0.6 part of lubricant.

Preferably, the particle size of the titanium dioxide is not more than 15 mu m, the titanium dioxide is rutile type as a coloring agent, the titanium dioxide is pure white, resistant to high and low temperature, good in corrosion resistance and anti-aging performance, and can be in contact with food.

Preferably, the particle size of the precipitated barium sulfate is not more than 15 microns, and the barium sulfate serving as an inorganic filler can reduce the shrinkage rate of the material, enhance the effect of titanium dioxide, improve the anti-aging performance and improve the heat resistance of the product.

Preferably, the number average molecular weight of the polydimethylsiloxane is more than 100 ten thousand, and the introduction of the ultra-high molecular weight polydimethylsiloxane can effectively prevent the materials from migrating to the surface of the master batch, so that the glossiness and the scratch resistance of the HIPS product, namely the refrigerator liner, can be improved.

Preferably, the lubricant is one of ethylene bis stearamide, polyethylene wax, microcrystalline wax and pentaerythritol ester.

Has the advantages that: the special master batch provided by the invention contains polydimethylsiloxane and precipitated barium sulfate at the same time, the precipitated barium sulfate is selected as an inorganic filler, the influence on the surface gloss of the HIPS plate can be obviously reduced, and meanwhile, the ultra-high molecular polydimethylsiloxane is added, so that the material can be effectively prevented from migrating to the surface of the master batch, the surface gloss of the HIPS plate is improved, and the surface gloss of a refrigerator liner product is further ensured, therefore, a high-performance and low-cost raw material is provided for the refrigerator liner product.

Detailed Description

The present invention will be described in detail with reference to examples for further understanding of the technical solutions of the present invention.

Example 1

TABLE 1

Name of Material	Ratio (in parts)
		PP320	24
NR930	53
		GY-6000	22
WET-742	0.5
		EB-FF	0.5

In Table 1, PP320 is a polypropylene produced by Nanjing Jinling chemical industry, and the melt index is 32g/10 min; NR930 is titanium dioxide white pigment produced by Nanjing Tipu titanium industry, the particle size is 12 μm, and the whiteness L is not less than 96; GY-6000 is precipitated barium sulfate produced by Jiangxi Guangxi chemical industry, and the particle size is 10 mu m; WET-742 is polydimethylsiloxane produced by En chemical industry in Anhui; EB-FF is ethylene bis stearamide produced by King of Japan.

Adding the raw materials into a high-speed stirrer, stirring and mixing at 350rpm/min for 5 minutes, and then extruding by a CTE65 type double-screw extruder, wherein the set temperature is as follows: first zone 200 ℃, second zone 205 ℃, third zone 205 ℃, fourth zone 210 ℃, fifth zone 210 ℃, sixth zone 210 ℃, seventh zone 215 ℃, eighth zone 215 ℃, ninth zone 215 ℃ and die head 220 ℃. And performing melt extrusion, cooling and grain cutting to obtain the refrigerator plate master batch.

Example 2

TABLE 2

Name of Material	Ratio (in parts)
		PP320	24
NR930	53
		HS-318	22
WET-742	0.5
		EB-FF	0.5

In Table 2, PP320 is a polypropylene produced by Nanjing Jinling chemical industry, and the melt index is 32g/10 min; NR930 is titanium dioxide white pigment produced by Nanjing Tipu titanium industry, the particle size is 12 μm, and the whiteness L is not less than 96; HS-318 is talcum powder produced by Jiangxi generalized industry, and the grain size is less than or equal to 10 mu m; WET-742 is polydimethylsiloxane produced by En chemical industry in Anhui; EB-FF is ethylene bis stearamide produced by King of Japan.

Example 3

TABLE 3

Name of Material	Ratio (in parts)
		PP320	27
NR930	48
		GY-6000	24
WET-742	0.4
		EB-FF	0.6

In Table 3, PP320 is a polypropylene produced by Nanjing Jinling chemical industry, and the melt index is 32g/10 min; NR930 is titanium dioxide white pigment produced by Nanjing Tipu titanium industry, the particle size is 12 μm, and the whiteness L is not less than 96; GY-6000 is precipitated barium sulfate produced by Jiangxi Guangxi chemical industry, and the particle size is 10 mu m; WET-742 is polydimethylsiloxane produced by En chemical industry in Anhui; EB-FF is ethylene bis stearamide produced by King of Japan.

Example 4

TABLE 4

Name of Material	Ratio (in parts)
		PP320	21
NR930	58
		GY-6000	20
WET-742	0.6
		P861/3.5	0.4

In Table 4, PP320 is a polypropylene produced by Nanjing Jinling chemical industry, and the melt index is 32g/10 min; NR930 is titanium dioxide white pigment produced by Nanjing Tipu titanium industry, the particle size is 12 μm, and the whiteness L is not less than 96; GY-6000 is precipitated barium sulfate produced by Jiangxi Guangxi chemical industry, and the particle size is 10 mu m; WET-742 is polydimethylsiloxane produced by En chemical industry in Anhui; p861/3.5 is pentaerythritol stearate (PETS) from German Corning.

Comparative example 1

TABLE 5

Name of Material	Ratio (in parts)
		PP320	25.5
NR930	53
		GY-6000	22
EB-FF	0.5

In Table 5, PP320 is a polypropylene produced by Nanjing Jinling chemical industry, and the melt index is 32g/10 min; NR930 is titanium dioxide white pigment produced by Nanjing Tipu titanium industry, the particle size is 12 μm, and the whiteness L is not less than 96; GY-6000 is precipitated barium sulfate produced by Jiangxi Guangxi chemical industry, and the particle size is 10 mu m; EB-FF is ethylene bis stearamide produced by King of Japan.

The master batches prepared in the above examples 1, 2, 3 and 4 and the comparative example 1 were subjected to color plate preparation to detect gloss by using HIPS622P of Shanghai Seisaceae as a dispersion resin at a conventional dispersion ratio of 4%, the color plate specification was 50 × 40 × 3mm, the test was carried out according to GB/T8807-1988, and the test results are shown in Table 6 by using a Haidan instrument HD-A823-4 multi-angle gloss meter at 60 ℃.

TABLE 6

As described above, the polydimethylsiloxane is introduced more in example 1 than in comparative example 1, and the test results in table 6 show that the introduction of the polydimethylsiloxane can significantly improve the glossiness of the smooth color plate; the results of the tests in Table 6 also show that precipitated barium sulfate can more effectively maintain the gloss of glossy panels. Therefore, the most preferable formula in example 1 shows that the synergistic effect of polydimethylsiloxane and barium sulfate can improve the glossiness of the HIPS board most effectively, so that the HIPS board is more suitable for being used as a refrigerator inner container material.

Claims

1. The special master batch for the HIPS plate for the refrigerator liner is characterized by comprising the following raw materials in parts by weight: 21-27 parts of polypropylene, 48-58 parts of rutile type titanium dioxide, 20-24 parts of precipitated barium sulfate, 0.4-0.6 part of polydimethylsiloxane and 0.4-0.6 part of lubricant, wherein the number average molecular weight of the polydimethylsiloxane is more than 100 ten thousand, the particle size of the titanium dioxide is not more than 15 mu m, and the particle size of the precipitated barium sulfate is not more than 15 mu m.

2. The special master batch for the HIPS board for the refrigerator liner as claimed in claim 1, wherein the lubricant is one of ethylene bis stearamide, polyethylene wax, microcrystalline paraffin and pentaerythritol ester.