A kind of thermoplastic elastomer composition and its preparation method and sealing gasket and the method for preparing sealing gasket in crown

A thermoplastic elastomer and sealing gasket technology, applied in the field of packaging, can solve the problems of increased logistics and initial processing costs, high hardness of sealing gaskets, unfavorable glass bottle sealing, etc., to meet food safety regulations, reduce flash and gaps , the effect of simple ingredients

Active Publication Date: 2021-05-11
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patent application CN103012903A discloses a method for preparing an effective sealing gasket using a combination of high-impact polystyrene HIPS, low-density polyethylene LDPE, and an elastomer, and a lubricant, but the hardness of the prepared sealing gasket is too high , which is not conducive to the sealing of glass bottles during long-distance transportation; patent application CN102408603A discloses a method for preparing sealing gaskets using low-density polyethylene LDPE, antioxidant masterbatch, coloring masterbatch and elastomer, but the antioxidant masterbatch And the coloring masterbatch contains low-density polyethylene, linear low-density polyethylene, talcum powder and polyethylene wax and other additives to improve gasket performance, but this increases logistics and initial processing costs; disclosed in the patent application CN1465507A A bottle cap gasket prepared from a composition containing ethylene-vinyl acetate copolymer (EVA), paraffin oil, polypropylene, polystyrene and elastomers, such a combination greatly increases logistics costs, while excessive ingredients and The addition of additives will bring serious challenges to the environmental safety and taste of bottle cap gasket materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of thermoplastic elastomer composition and its preparation method and sealing gasket and the method for preparing sealing gasket in crown

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] According to the method for preparing the sealing gasket in the crown cap provided by the present invention, during the extrusion process, the extrusion conditions are not particularly limited, for example, the extrusion conditions may include: the motor speed is 200-400rpm , the extrusion temperature is 85-120°C, preferably 85-115°C.

[0045] According to the method provided by the present invention, in the stamping process, in order to ensure the stability in the processing process, the stamping speed cannot be too fast, and in order to allow the sealing gasket to be rapidly cooled and formed, the stamping temperature cannot be too high. High, for example, the stamping conditions may include: a stamping speed of 2000-8000 pieces / min, preferably 5000 pieces / min, and a stamping temperature of 5-10°C.

Embodiment 1

[0062] Accurately weigh 1100g metallocene polyethylene, 900g styrene-butadiene-styrene block copolymer, 2g nucleating agent, mix in a high-speed mixer for 2min, utilize twin-screw extruder to extrude and granulate, and the motor speed is 300rpm, the temperature of the screw section is set to 160°C in the conveying section, 165°C in the melting section, 170°C in the mixing section, 170°C in the exhaust section, and 160°C in the homogenization section, passing through a 20°C cold water tank, and cutting. The resulting mixed ions were dried overnight at 70 °C. The obtained pellets are re-extruded with twin-screws, and the temperature of the screw section is set to 85°C in the conveying section, 90°C in the melting section, 100°C in the mixing section, 105°C in the exhaust section, and 115°C in the homogenization section, and are directly stamped on the crown cover Above, the processing speed is 5000 pieces / min, and the stamping temperature is 10°C.

[0063] Among them, the α-ole...

Embodiment 2

[0068] Accurately weigh 1400g metallocene polyethylene, 600g styrene-butadiene-styrene block copolymer, 1g nucleating agent, mix 1min in a high-speed mixer, utilize twin-screw extruder to extrude and granulate, and the motor speed is 250rpm, the temperature of the screw section is set to 160°C in the conveying section, 165°C in the melting section, 170°C in the mixing section, 170°C in the exhaust section, and 160°C in the homogenization section, passing through a 25°C cold water tank, and cutting. The resulting mixed ions were dried overnight at 70 °C. The obtained pellets are re-extruded with twin-screws, and the temperature of the screw section is set to 85°C in the conveying section, 90°C in the melting section, 100°C in the mixing section, 105°C in the exhaust section, and 115°C in the homogenization section, and are directly stamped on the crown cover Above, the processing speed is 5000 pieces / min, and the stamping temperature is 5°C.

[0069] Among them, the α-olefin i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of packaging, in particular to a thermoplastic elastomer composition, a preparation method and application thereof, and a method for preparing a sealing gasket in a crown cap. The thermoplastic elastomer composition contains metallocene polyethylene, styrene elastomer and nucleating agent, the evaporation residue of the thermoplastic elastomer composition after ethanol immersion and reflux is less than 15 mg / mL, and the evaporation residue after water immersion and reflux The evaporation residue is less than 10mg / mL. The thermoplastic elastomer composition has simple components, good economic benefits, meets food safety regulations, has low Shore A hardness and good sealing performance, and can guarantee processing stability during high-speed processing.

Description

technical field [0001] The invention relates to the field of packaging, in particular to a thermoplastic elastomer composition, a preparation method thereof, a sealing gasket and a method for preparing the sealing gasket in a crown cap. Background technique [0002] The bottle cap gaskets used in my country's beer industry are mainly based on polyvinyl chloride (PVC) and polyethylene (PE). Wherein, in the sealing gasket of PVC material, relative to the sealing gasket of 100 parts by weight of the PVC material, its main components and contents are respectively 35-40 parts by weight of plasticizer, 5 parts by weight of stabilizer, 55-60 parts by weight of PVC and other small amounts of additives, such a gasket material has the characteristics of low hardness and good resilience, so the prepared bottle cap material has good sealing performance. However, as people pay more attention to food safety issues and worry about the harm to the human body after the migration of plastici...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L53/02B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08L23/0815C08L2205/24C08L2207/04C08L53/02
Inventor 徐毅辉邹浩张师军高达利初立秋徐萌杨庆泉邵静波刘建叶徐凯侴白舸吕芸白弈青张琦
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap