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PET heat-sealing auxiliary agent, PET heat-sealing sheet and preparation method of PET heat-sealing auxiliary agent and PET heat-sealing sheet

A technology of sealing aids and additives, applied in the field of PET heat-sealing materials, can solve the problems of insufficient supply of PETG raw materials, expensive equipment, thin covering thickness, etc.

Pending Publication Date: 2022-07-15
东莞鸿冠新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of PET sheet has various defects such as complex production process, expensive equipment, high material cost, and difficulty in recycling leftover materials. At the same time, when the packaging box is heat-sealed, it is easy to cause partial sealing and heat-sealing to be weak.
The reason is that the thickness of the upper and lower layers of PETG material of the three-layer co-extrusion is thin, and the coverage is uneven. The heat sealing effect of the thin or not covered place is worse than that of the covered thick place.
[0006] As PETG raw materials are currently only two companies with relatively mature technology in the world, Eastman of the United States and SK of South Korea, there is insufficient supply of PETG raw materials, unstable supply, and high prices (the price of PETG is 2.5-3 times the price of PET) and other practical issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] The preparation method of PET heat-sealing auxiliary agent: it comprises the following steps:

[0049] Step 1: Prepare the main material for tackifying, mix 1-30 parts of styrene elastomer, 1-10 parts of silane coupling agent, and 10-75 parts of petroleum resin in proportion, add to twin-screw extruder, and extrude After the melting, shear dispersion and homogenization of the extruder, the strands are extruded. The temperature of the extruder in the melting stage is controlled at 120゜C-160゜C, and the temperature in the shearing and dispersion stage is controlled at 140゜C-150゜C. The temperature of the melting stage is controlled at 120゜C, the temperature of the die head is controlled at 150゜C-160゜C, the main engine speed is 20-40rpm, and the time is 1-3min. The product particles are cylindrical particles with a diameter of 2-3mm and a height of 2-3mm. If the particle size is too large or too small, it is easy to cause unstable product quality due to uneven mixing and fe...

Embodiment 1

[0055] The preparation method of PET heat sealing auxiliary agent, it comprises the following steps:

[0056] Step 1: Prepare the main material for tackifying, mix 1 part of styrene elastomer, 1 part of silane coupling agent, and 10 parts of petroleum resin in proportion, add to the twin-screw extruder, and melt and shear the extruder. After the effect of dispersion and homogenization, the strands are extruded, the temperature of the extruder melting stage is controlled at 120゜C, the temperature of the shear dispersion stage is controlled at 140゜C, the temperature in the homogenization stage is controlled at 120゜C, and the temperature of the die head is controlled at 150゜C, the main engine speed is 20rpm, and the time is 1min. After the strand is cooled by water, it is cut into pellets to obtain the viscosity-increasing main material. The product particles are cylindrical particles with a diameter of 2mm and a height of 2mm. If the particle size is too large or too small, it ...

Embodiment 2

[0061] The preparation method of PET heat-sealing auxiliary agent: it comprises the following steps:

[0062] Step 1: Prepare the tackifying main material, mix 30 parts of styrene elastomer, 10 parts of silane coupling agent, and 75 parts of petroleum resin in proportion, add it into a twin-screw extruder, and melt and shear the extruder. After the effect of dispersion and homogenization, the strands are extruded, the temperature of the extruder melting stage is controlled at 160゜C, the temperature in the shear dispersion stage is controlled at 150゜C, the temperature in the homogenization stage is controlled at 120゜C, and the die temperature is controlled at 160゜C, the main engine speed is 40rpm, and the time is 3min. After the strands are cooled by water, they are cut into pellets to obtain the main material of viscosity increase. The product particles are cylindrical particles with a diameter of 3mm and a height of 3mm. If the particle size is too large or too small, it is ...

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Abstract

The invention discloses a PET (Polyethylene Terephthalate) heat-sealing auxiliary agent which is prepared from the following components in parts by mass: 1 to 30 parts of PET resin, 1 to 30 parts of styrene thermoplastic elastomer, 1 to 10 parts of silane coupling agent, 10 to 75 parts of petroleum resin, 0.1 to 5 parts of dispersing agent, 0.1 to 1 part of antioxidant and 1 to 20 parts of polyoxyethylene. The invention also discloses a PET heat-sealing sheet and a preparation method of the PET heat-sealing auxiliary agent. According to the invention, PET is modified by using the tackifying function of petroleum resin, the cross-linking toughening effect of styrene thermoplastic elastomer and the complexing effect of polyoxyethylene according to the principle of permeation tackifying, so that the surface performance of PET is changed, and the physical and chemical properties of the PET raw material are changed fundamentally; therefore, the PET sheet material is changed into a new material which can be subjected to heat sealing from the mode that the PET sheet material cannot be subjected to heat sealing packaging. The problems that an existing outer packaging box is generally complex in production process, poor in leakproofness, poor in sanitary safety, high in cost and the like are solved.

Description

technical field [0001] The invention relates to the technical field of PET heat-sealing materials, in particular to a PET heat-sealing aid, a PET heat-sealing sheet and a preparation method thereof. Background technique [0002] PET resin has good mechanical properties, and has the advantages of acid and alkali resistance, good transparency, non-toxicity, good penetration resistance, low cost, etc. It is widely used in food, medicine, daily necessities, batteries, capacitors, electrical components, flexible printed circuit boards, etc. The outer packaging of the product. However, PET resin has a biggest disadvantage as a packaging material. Due to the molecular structure of PET itself, PET sheets made of PET resin cannot be packaged and sealed by heat sealing, which greatly affects the PET resin as an outer packaging. Universal, closed and safe. [0003] At present, there are mainly two ways of sealing PET sheets for outer packaging. [0004] The first is to design a buck...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L53/02C08L57/02C08L71/02C08J5/18
CPCC08L67/02C08L53/02C08L53/025C08L57/02C08L71/02C08J5/18C08J2367/02C08J2467/02C08J2453/02C08J2457/02C08J2471/02
Inventor 胡冠中李彬
Owner 东莞鸿冠新材料科技有限公司
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