Yoghurt cup sheet raw material and preparation method thereof

A technology for yogurt cups and raw materials, applied in the field of synthetic resins, can solve the problems of complex blending of HIPS and rubber, failure to meet the sensory needs of consumers, easy occurrence of macula, black spots, etc., and achieve excellent appearance and good rigidity , good impact resistance effect

Active Publication Date: 2019-01-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the method of blending HIPS and rubber is relatively complicated, and due to the problem of poor blending of HIPS and rubber, macular spots and black spots are prone to occur during processing, and the defective rate increases, making it difficult to make the yogurt cup sheet material have a good surface quality. The visual performance cannot meet the sensory needs of consumers

Method used

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  • Yoghurt cup sheet raw material and preparation method thereof
  • Yoghurt cup sheet raw material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a kind of equipment for preparing yogurt cup sheet material, figure 1 For the schematic diagram of equipment for preparing yogurt cup sheet material provided by the embodiment of the present invention, please refer to figure 1 , the equipment includes a first feeding tank 1, a second feeding tank 2, a filtering unit 3, a mixing unit 4, a reaction unit 5, a devolatilization unit 6 and a granulation unit 7 connected in sequence; the connection between the filtering unit 3 and the mixing unit 4 The connecting pipeline between them is also communicated with the mineral oil storage tank 8; the devolatilization unit 6 includes a polymer output port 61 and a volatile matter output port 62, the polymer output port 61 communicates with the granulation unit 7, and the volatile matter output port 62 communicates with the second The feeding tank 2 is connected.

[0044] Wherein, the filter unit 3 includes two filters connected in series, i.e. a primary fil...

Embodiment 2

[0047] In this embodiment, the equipment in Embodiment 1 is used to prepare raw materials for yogurt cup sheets.

[0048] 1. Prepare materials

[0049] 4.5 parts by weight of polybutadiene rubber: a mixture of the first low-cis polybutadiene rubber and the second low-cis polybutadiene rubber in a mass ratio of 1:1;

[0050] Wherein, the first low-cis polybutadiene rubber is a star structure, Mooney viscosity (50ML (1+4) 100 ℃) is 50, and at 25 ℃, the viscosity in 5wt% styrene is 34.8mPa· s;

[0051] The second low cis-polybutadiene rubber has a linear structure, the Mooney viscosity (50ML(1+4)100°C) is 51, and at 25°C, the viscosity of 5wt% styrene is 165mPa·s;

[0052] β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate) 0.05 parts by weight;

[0053] 0.5 parts by weight of zinc stearate;

[0054] 12 parts by weight of ethylbenzene;

[0055] 3 parts by weight of mineral oil;

[0056] 79.95 parts by weight of styrene.

[0057] 2. Formation of the first mixture ...

Embodiment 3

[0070] In this embodiment, the equipment in Embodiment 1 is used to prepare raw materials for yogurt cup sheets.

[0071] 1. Prepare materials

[0072] 5 parts by weight of polybutadiene rubber: a mixture of the first low-cis polybutadiene rubber and the second low-cis polybutadiene rubber in a mass ratio of 1:1;

[0073] Wherein, the first low-cis polybutadiene rubber is a star structure, Mooney viscosity (50ML (1+4) 100 ℃) is 51, and at 25 ℃, the viscosity in 5wt% styrene is 35.8mPa· s;

[0074] The second low cis-polybutadiene rubber is a linear structure, the Mooney viscosity (50ML(1+4)100°C) is 52, and at 25°C, the viscosity of 5wt% styrene is 168mPa·s;

[0075] β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate) 0.08 parts by weight;

[0076] 0.7 parts by weight of zinc stearate;

[0077] 17 parts by weight of ethylbenzene;

[0078] 4 parts by weight of mineral oil;

[0079] 73.22 parts by weight of styrene.

[0080] 2. Formation of the first mixture

...

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Abstract

The invention provides a yoghurt cup sheet raw material and a preparation method thereof. The yoghurt cup sheet raw material comprises the following components by weight: 6-7.5 parts of polybutadienerubber, 3-5 parts of mineral oil, 0.05-0.1 part of an antioxidant, and 87.4-90.95 parts of polystyrene. Specifically, the polybutadiene rubber has a particle size distribution of 1-8micron unimodal distribution. The yoghurt cup sheet raw material has a weight-average molecular weight of 19000-230000, impact resistance of 11-14kJ/m<2>, and tensile strength of 27-30Mpa. The yoghurt cup sheet raw material provided by the invention is HIPS with special strength properties, has good processability, rigidity and impact resistance, can be directly used as yoghurt packaging material, and has no need for adding rubber products, thereby further avoiding the phenomena of yellow spots and black spots caused by uneven mixing of rubber and HIPS.

Description

technical field [0001] The invention relates to a preparation method of a sheet material, in particular to a yogurt cup sheet material and a preparation method thereof, belonging to the technical field of synthetic resins. Background technique [0002] With the improvement of people's living standards, the demand for healthy drinks is increasing year by year, and yogurt has become one of the first choices for pursuing healthy drinks, which has brought about the vigorous development of the yogurt packaging industry. The products used in the manufacture of yogurt cup sheets should not only have good processing performance to ensure the processing efficiency of the products and meet the needs of large-scale production, but also have high rigidity to meet the crispness of the sheet products and ensure the transportation process The demand for stacking and placing of medium-sized products without collapsing also needs to have excellent impact resistance to ensure that the yogurt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/02C08F212/08C08F2/00C08L51/04C08L91/06C08L25/06
CPCC08F279/02C08L51/04C08L2205/025C08L2205/03C08L91/06C08L25/06C08F212/08C08F2/001
Inventor 张璐吴利平朱军杨昌辉关莉张治军马小伟廖仿燕薛江龚官浩
Owner PETROCHINA CO LTD
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