Unlock instant, AI-driven research and patent intelligence for your innovation.

APET packaging sheet capable of being heat-sealed at high frequency and preparation method thereof

A packaging sheet and high-frequency technology, which is applied in the field of APET packaging sheet and its preparation, can solve the problems of difficult recycling of recycled materials, high cost, and high addition of low-melting point materials, and achieve low formula cost and high-frequency sealing efficiency High and low energy consumption

Inactive Publication Date: 2013-05-08
广东金榜塑料包装有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technologies can reduce costs to a certain extent, they have higher requirements for equipment and technology, and there is also the problem that recycled materials are difficult to reuse
Recently, the research on heat-sealable APET has been developing in the direction of blending: some scholars have achieved the heat-sealing effect by adding low-melting-point polar materials with better compatibility with PET. This method requires more low-melting-point materials to be added ( The addition amount should reach 30-50%), but the cost is relatively high

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A method for preparing a high-frequency heat-sealable APET packaging sheet, comprising the following steps:

[0019] 1) Mix the raw materials evenly and dry until the water content is lower than 50ppm;

[0020] 2) Put the raw material mixture in the previous step into the PET extrusion sheet unit for extrusion molding.

[0021] Wherein, step 1) is to place the raw material in a crystallization dryer to realize crystallization drying.

[0022] In step 2), the temperature of each zone of the extrusion sheet machine is: zone 1: 270-275°C, zone 2: 270-275°C, zone 3: 270-275°C, zone 4: 265-270°C, zone 5: 265-270 ℃, six zones 265-270 ℃, the production sheet specification is 0.40×610, the speed of the metering pump is 22-55r / min, the linear speed of the fixed roller is 15.2-15.4m / min, and the linear speed of the pressure roller is 15.6-15.8m / min, the linear speed of the shaping roller is 15.8-16m / min, and the linear speed of the traction roller is 15.8-16m / min.

[0023] Th...

Embodiment 1

[0026] The raw material composition of the high-frequency heat-sealable APET packaging sheet is shown in Table 1:

[0027] Table 1: Raw material composition of high-frequency heat-sealable APET packaging sheet

[0028] raw material parts by mass APET 40 SMA with a weight average molecular weight of 120,000 and a grafting rate of 25% 2

[0029] After the formed sheet is plastic-absorbed, high-frequency heat-sealing is performed on the sheet. The temperature of high-frequency heat-sealing is 100-120°C, the heat-sealing current is 0.45-0.55A, and the heat-sealing time is 3 seconds. The oscillation cycle rate is 27.12MHz.

Embodiment 2

[0031] The raw material composition of the high-frequency heat-sealable APET packaging sheet is shown in Table 2:

[0032] Table 2: Raw material composition of high-frequency heat-sealable APET packaging sheet

[0033] raw material parts by mass APET 100 SMA with a weight average molecular weight of 100,000 and a grafting rate of 30% 5

[0034] After the formed sheet is plastic-absorbed, high-frequency heat-sealing is performed on the sheet. The temperature of high-frequency heat-sealing is 100-120°C, the heat-sealing current is 0.45-0.55A, and the heat-sealing time is 2 seconds. The oscillation cycle rate is 27.12MHz.

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
molecular weightaaaaaaaaaa
water contentaaaaaaaaaa
degree of graftingaaaaaaaaaa
Login to View More

Abstract

The invention discloses an amorphous polyethylene terephthalate (APET) packaging sheet capable of being heat-sealed at high frequency and a preparation method thereof. The sheet comprises the following raw materials in part by mass: 40 to 100 parts of APET, and 2 to 5 parts of stryenemaleic anhydride (SMA). The preparation method of the APET packaging sheet capable of being heat-sealed at high frequency comprises the following steps of: uniformly mixing the raw materials, and drying; and placing the mixture of the raw materials in a polyethylene terephthalate (PET) extrusion sheet machine setand performing extrusion molding. The APET packaging sheet capable of being heat-sealed at high frequency, which is provided by the invention has high high-frequency seal efficiency, the formed sheetis transparent and meets the requirement of food and drug administration (FDA), and the APET packaging sheet capable of being heat-sealed at high frequency is suitable for the fold package of cosmetics, foods, toys, printing and the like or low-draw-ratio blister packages, has low cost, and is low in energy consumption, the production equipment and process are simple; and the recovery material can be recycled.

Description

technical field [0001] The invention relates to a high-frequency heat-sealable APET packaging sheet and a preparation method thereof. Background technique [0002] With the rise of plastic sheet packaging, research on heat-sealable sheets has gradually become a research hotspot, but most heat-sealing technologies are limited to plastic films, because the thickness of plastic sheets is relatively large, and traditional heating methods The sealing method is inefficient, consumes a lot of energy, and the heat sealing effect is not very good. [0003] High-frequency heat sealing is a packaging method that has emerged in recent years. Its principle is to use high-frequency electric fields to make polar groups in dielectric materials polarized and oriented. Because the direction of the electric field is constantly changing, the polar groups are also repeatedly oriented. , continuous torsional movement, thus continuous friction and heat generation, and finally welding and sealing....

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): B29C47/60B65D65/38B29C47/92B29C48/92
CPCY02P70/10
Inventor 邹华
Owner 广东金榜塑料包装有限公司