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A kind of manufacturing method of PMMA alloy-PC composite board

A manufacturing method and composite board technology, which can be applied to flat products, other household appliances, household appliances, etc., can solve problems such as poor interface compatibility, large stress and strain, and easy delamination of double-layer composite boards.

Active Publication Date: 2021-12-31
ZHEJIANG DAOMING OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some manufacturers in the market have tried to combine PMMA or PMMA alloy materials with PC materials to form a new material with both high elasticity and high hardness. However, due to the large stress and strain and interface phase between PC materials and PMMA materials The problem of poor capacity, the finished double-layer composite board is easy to delaminate and fall off
In order to avoid the above problems, the current common practice is to mix the two materials before extrusion molding to form a mixed material, and then calender the mixed material, and the final finished sheet is a single-layer sheet. It is impossible to make double-layer or multi-layer composite boards, so it needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for manufacturing a PMMA alloy-PC composite board, the preparation steps are as follows:

[0041] (a) Take 3 parts of antioxidant and 1 part of UV stabilizer in parts by weight and place the antioxidant and UV stabilizer in a mixer, first stir at 60r / min for 2 minutes and then stir at 360r / min / min speed of stirring for 5 minutes to form a premix, which is placed in a granulator to make particles A;

[0042](b) Take 29 parts by weight of the PMMA block composition and 67 parts of polycarbonate A, and mix the PMMA block composition, the polycarbonate A, and the particles prepared in step (a) A is placed in a granulator to make particle B. The temperature of the first stage of the granulator is 212°C, the temperature of the second stage is 220°C, the temperature of the third stage is 230°C, the temperature of the die is 250°C, and the plasticization residence time is 1 minute, the absolute vacuum pressure is 0.06Mpa;

[0043] (c) Take polycarbonate B, add the p...

Embodiment 2

[0063] A method for manufacturing a PMMA alloy-PC composite board, the preparation steps are as follows:

[0064] (a) Take 4 parts of antioxidant and 2 parts of UV stabilizer in parts by weight and place the antioxidant and UV stabilizer in a blender, stir at 60r / min for 3 minutes and then stir at 360r / min / min speed of stirring for 6 minutes to form a premix, which is placed in a granulator to make particles A;

[0065] (b) Take 30 parts by weight of the PMMA block composition and 63 parts of polycarbonate A, and mix the PMMA block composition, the polycarbonate A, and the particles prepared in step (a) A is placed in a granulator to make particle B. The temperature of the first stage of the granulator is 225°C, the temperature of the second stage is 235°C, the temperature of the third stage is 245°C, the temperature of the die is 270°C, and the plasticization residence time is 2 minutes, the absolute vacuum pressure is 0.08Mpa;

[0066] (c) Take polycarbonate B, add the pa...

Embodiment 3

[0086] A method for manufacturing a PMMA alloy-PC composite board, the preparation steps are as follows:

[0087] (a) Take 4 parts of antioxidant and 2 parts of UV stabilizer in parts by weight and place the antioxidant and UV stabilizer in a blender, stir at 60r / min for 2 minutes and then stir at 360r / min / min speed of stirring for 5 minutes to form a premix, which is placed in a granulator to make particles A;

[0088] (b) Take 29 parts by weight of the PMMA block composition and 70 parts of polycarbonate A, and combine the PMMA block composition, the polycarbonate A, and the particles prepared in step (a) A is placed in a granulator to make particle B. The temperature of the first stage of the granulator is 214°C, the temperature of the second stage is 222°C, the temperature of the third stage is 232°C, the temperature of the die is 260°C, and the plasticization residence time is 1.5 minutes, the absolute vacuum pressure is 0.07Mpa;

[0089] (c) Take polycarbonate B, add ...

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PUM

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Abstract

The invention discloses a method for manufacturing a PMMA alloy-PC composite board. The preparation steps are as follows: (a) Put an antioxidant and a UV stabilizer in a mixer, first stir at a speed of 60r / min for 2 to 3 minutes, and then stir at a speed of 360r / min. Stir at min speed for 5-6 minutes to form a premix, and place the premix in a granulator to make particles A; (b) mix the PMMA block composition, polycarbonate A, and the Particle A is placed in a granulator to make particle B; (c) Particle B and polycarbonate B are added to the extruder and extruded to form a composite layer. The composite layer includes layer A and layer B, and layer A accounts for the total amount of the composite layer. 5%~20% of the thickness, layer A is formed by extrusion of particle B melted and plasticized, layer B is formed by extrusion of polycarbonate B melted and plasticized, and the composite layer is formed by constant temperature roller calendering to form PMMA alloy-PC Composite board. The invention solves the problem of poor interface compatibility of the PMMA alloy-PC composite board, and reduces the performance requirements of the mold and the injection molding machine in the later stage of the in-mold injection molding process.

Description

technical field [0001] The invention relates to a method for manufacturing a composite board, in particular to a method for manufacturing a PMMA alloy-PC composite board. Background technique [0002] Polycarbonate, also known as PC, has the characteristics of colorless and transparent, heat-resistant, flame-retardant, high strength, high elastic modulus, high impact strength, and wide operating temperature range. It is widely used in mobile phones, personal computers, home decoration surfaces, etc. field. The full name of PMMA is polymethyl methacrylate, also known as acrylic, acrylic or plexiglass. It is a colorless and transparent plastic material. Compared with PC, PMMA has higher hardness. [0003] At present, some manufacturers in the market have tried to combine PMMA or PMMA alloy materials with PC materials to form a new material with both high elasticity and high hardness. However, due to the large stress and strain and interface phase between PC materials and PMMA...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/00B29C43/24C08L69/00C08L53/00
CPCB29D7/00B29C43/24C08L69/00C08L53/00
Inventor 李祥涛方振明熊泽安梅业林胡玲静
Owner ZHEJIANG DAOMING OPTOELECTRONICS TECH