Pearl cotton plates with high compressive strength and high thickness and preparation thereof

A technology of compressive strength and manufacturing method, which is applied in the field of high compressive strength and high thickness pearl cotton sheet and its manufacturing field, can solve the problems of high processing cost, long processing procedure, failure to meet packaging requirements, etc., and achieves low processing cost, The effect of fewer manufacturing steps

Inactive Publication Date: 2008-10-22
SHENZHEN BAODONGSHENG PLASTIC PACKING PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products made in this way have low compressive strength and cannot meet some packaging requirements, and need to be foamed many times to get the finished product. The processing procedure is long and the processing cost is high.

Method used

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  • Pearl cotton plates with high compressive strength and high thickness and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Referring to Fig. 1, a single-screw extruder 1 with a screw diameter of 200 mm and L / D=32 is used. The exit of the mold 7 is a rectangle with a length of 1,000 mm and a width of 300 mm, and the length of the mold is 2,000. A cooling device 8 is provided at the end of the mold, and ice water at 0°C is passed into it for cooling. Add 100 kilograms of low-density polyethylene (18D of Daqing Petrochemical Branch) into hopper 2, 0.8 kilograms of talcum powder into foaming nucleator hopper 3, and 1.5 kilograms of monoglyceride into anti-shrinking agent hopper 4. Ester, connect the blowing agent bottle 6. Start the extruder 1 and the heating device, heat the sleeve temperature to 170°C, and set the screw speed to 30 rpm. Open the hopper and feed continuously at the speed of 30 minutes, and pass in 18 kg of butane. At this time, the resin pressure at the tip of the screw was 20 MPa, and the residence time from passing the tip of the screw to the die outlet was 48 seconds. The prepa...

Embodiment 2

[0032] Basically similar to Example 1, 100 kg of low-density polyethylene, 20 kg of butane, 0.5 kg of talc and 1 kg of monoglyceride were used. The heating temperature is 180°C. Use a flat mold with a thickness of 30 cm. The test indexes of the prepared pearl cotton board are shown in Table 1.

Embodiment 3

[0034] Basically similar to Example 1, 100 kg of low-density polyethylene, 15 kg of butane, 1 kg of talc and 2 kg of monoglycerides were used. The heating temperature is 150°C. Use a flat mold with a thickness of 30 cm. The test indexes of the prepared pearl cotton board are shown in Table 1.

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Abstract

The invention belongs to the packaging material technical field and discloses a pearl wool plank and a method for making the same. The pearl wool plant is made of 100 kilograms of low-density polyethylene, 15 to 20 kilograms of foaming agent, 0.5 to 1 kilogram of foaming nucleating agent and 1 to 2 kilograms of antishrinking agent which are foamed once. The method for making the pearl wool plank comprises the following steps that: low density polyethylene and foaming nucleating agent are added continuously at the screw tail part of a screw extruding press and are melted down at a temperature of between 150 and 180 DEG C; meanwhile, the antishrinking agent and the foaming agent are added inside the screw extruding press according to the dosage, the foaming agent is added near the middle part of a screw, the antishrinking agent is added between the positions of the low density polyethylene and the foaming agent; the melting low density polyethylene mixed with the foaming agent, the foaming nucleating agent and the antishrinking agent sprayed by the extruding press is extruded inside a flat plate die to form, the resin pressure at the front end of the screw is between 10 and 100MPa, the flat plate die is adopted. The plank is cooled and cut as well as packed. The pearl wool plank has a thickness more than 20 millimeters and a pressive strength higher than 1.0MPa, can be used for the high-class packaging material, has few manufacture processes, needs one step to form and has low process cost.

Description

Technical field [0001] The invention relates to a polyethylene foam material, in particular to a pearl cotton board with high compressive strength and high thickness and a manufacturing method thereof. Background technique [0002] EPE, the English abbreviation is EPE, is extruded from low-density polyethylene as the main raw material to produce high-foam polyethylene products. EPE has high elasticity, is tough but not brittle, and has a soft surface. It can effectively prevent damage caused by friction during product packaging. It has excellent shock resistance and anti-shock performance, plus resource reuse and recyclability. , It has quickly become a new type of environmentally friendly packaging material. It is now widely used in electronic products, glass products, high-end furniture, fruits, precision electronic instruments, high-end clothing and footwear and other product packaging. It can also be used for composite packaging. The use of wooden floor as mulch will graduall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/14C08K5/10B29C47/14B29C47/92C08K3/36B29C48/305B29C48/92
CPCB29C47/92B29C48/07B29C48/92B29C2948/92514B29C2948/92704B29C2948/92895
Inventor 李院恒
Owner SHENZHEN BAODONGSHENG PLASTIC PACKING PRODS
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