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Method for preparing double-color foamed sheet based on temperature control

A foamed sheet and temperature control technology, applied in the foaming field, can solve the problem of additionally introducing adhesives and the like

Pending Publication Date: 2022-03-01
SHINCELL NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects that secondary processing and additional adhesives need to be introduced during the preparation of existing two-color foamed boards, the present invention provides a method for preparing two-color foamed boards based on temperature control, which includes the following steps:

Method used

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  • Method for preparing double-color foamed sheet based on temperature control
  • Method for preparing double-color foamed sheet based on temperature control
  • Method for preparing double-color foamed sheet based on temperature control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: A method for preparing a two-color foamed sheet based on temperature control

[0057] This embodiment provides a method for preparing a two-color foamed sheet based on temperature control, including the following steps:

[0058] Step 1: Put the foamed mother board into the mold cavity of the foaming mold, and raise the temperature in the mold cavity to the first saturation temperature T 1 ;

[0059] Step 2: Inject the foaming agent and heat up to the first saturation temperature T 1 In the mold cavity, so that the foaming agent is at the first saturation temperature T 1 Dissolved into the foamed mother board;

[0060] Step 3: Wait for the foaming agent to reach the first saturation temperature T in the foaming mother board 1 After the saturation state under, the temperature in the mold cavity is raised to the second saturation temperature T 2 and maintain a preset length of time t 2 , so that the foamed mother board forms a temperature gradient in the t...

Embodiment 2

[0089] Embodiment 2: a kind of foam mold

[0090] Such as figure 1 As shown, the present embodiment provides a foaming mold for realizing the method described in Example 1. The foaming mold includes a fixed mold 1 and a moving mold 2; when the fixed mold 1 and the moving mold 2 are closed, both The inner space forms a mold cavity 6, and the mold cavity 6 is used to place a foaming mother board 7; a height control device 8 is provided in the mold cavity 6; the height control device 8 includes a driving member 9 and a moving plate 10; The driving member 9 can drive the moving plate 10 to move in the mold cavity 6 along the thickness direction of the foaming mother board 7 , so that the moving board 10 is attached to the foaming mother board 7 .

[0091] As preferably, the foaming mold also includes an injection pipeline 3, a pressure control device 4 and a pressure relief pipeline 5; channel; the pressure control device 4 applies pressure to the movable mold 2 so that the mold...

Embodiment 3

[0097] Example 3: Application of the method described in Example 1 in the preparation of two-color foamed sheet

[0098] This embodiment provides the application of the method described in Example 1 in the preparation of two-color foamed sheets, and the application uses the foaming mold described in Example 2 (the size of the mold cavity 6 of the foaming mold is 1000mm long * wide 800mm * high 50mm) to foam the foamed mother board, and use a TPU (thermoplastic polyurethane elastomer rubber) solid plate with a length of 500mm*width 300mm*thickness of 10mm as the foamed mother board (Tg=-40°C, Shore hardness 80A), specifically Including the following steps:

[0099] Step 1: After putting the foamed mother board into the mold cavity of the foaming mold, use the telescopic screw rod to control the moving plate to move in the mold cavity along the thickness direction of the foamed mother board. After the combination, the mold cavity and the moving plate are heated by program tempe...

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Abstract

The invention relates to a method for preparing a double-color foamed board based on temperature control, and belongs to the technical field of foaming. The invention provides a method for preparing a double-color foamed sheet based on temperature control, which comprises the following steps of: putting a foamed mother board into a mold cavity of a foaming mold, raising the temperature in the mold cavity to a first saturation temperature, injecting a foaming agent into the mold cavity, and dissolving the foaming agent into the foamed mother board, and after the foaming agent reaches a saturation state at the first saturation temperature in the foaming mother board, raising the temperature in the mold cavity to a second saturation temperature and keeping the second saturation temperature for a preset length of time, so that the foaming mother board forms a temperature gradient in the thickness direction, and after the temperature gradient is formed, releasing the pressure in the mold cavity to the environmental pressure, so that the foaming mother board expands and foams. According to the method, a temperature gradient is formed in the thickness direction of a foaming mother board by controlling the temperature in a mold cavity, so that the foaming mother board forms a melt strength difference in a foaming environment, and finally chromatic aberration is formed.

Description

technical field [0001] The invention relates to a method for preparing a two-color foamed board based on temperature control, which belongs to the field of foaming technology. Background technique [0002] Thermoplastic elastomers are materials that combine the elasticity of rubber with the melt flow and reusability of thermoplastics. It is widely used in the field of consumer goods because of its excellent physical and mechanical properties and electrical insulation properties. Common thermoplastic elastomers include thermoplastic polyurethane elastomer rubber (TPU), polyolefin elastomer (POE), thermoplastic polyester elastomer (TPEE), nylon elastomer (PEBA), etc. [0003] Thermoplastic elastomer foaming material is a soft polymer foaming material formed by dispersing a large number of bubbles in thermoplastic elastomer. It has the characteristics of light weight, rebound, cushioning, and shock absorption. Mats, climbing mats and other sports consumer products. As a cons...

Claims

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Application Information

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IPC IPC(8): B29C44/04B29C44/34B29C44/60B29L7/00
CPCB29C44/0407B29C44/3415B29C44/60B29L2007/002
Inventor 姜修磊余加保
Owner SHINCELL NEW MATERIAL CO LTD
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