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A kind of co-extruded composite plate and its preparation method

A composite board and co-extrusion molding technology, applied in the direction of heat preservation, building components, etc., can solve the problems of foamed wood-plastic composite materials entering metal profiles, the decrease of ductility and impact resistance, and the blockage of the inner cavity of metal profiles, etc., to achieve Distribute thermal expansion and contraction stress, reduce the difference in expansion and contraction, and ensure the effect of basic strength

Active Publication Date: 2019-05-21
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the density of wood-plastic composites is 3-4 times that of traditional wood products, its ductility and impact resistance are reduced, the material is brittle, and its mechanical strength (tensile and bending) is smaller than that of unfilled plastics, which limits its application
The inventor found that if the foaming technology is used to improve its performance, because the foamed wood-plastic composite material has strong fluidity, the molten wood-plastic composite material can easily pass through the holes, causing a large amount of foamed wood-plastic composite material to enter the interior of the metal profile. , to block the inner cavity of the metal profile

Method used

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  • A kind of co-extruded composite plate and its preparation method
  • A kind of co-extruded composite plate and its preparation method
  • A kind of co-extruded composite plate and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Weigh raw materials:

[0065] Weigh the raw materials of wood-plastic frame 1: 40 parts by weight of polyvinyl chloride, 35 parts by weight of wood powder (wood powder, aspect ratio less than 40:1, particle diameter less than 1mm), 10 parts by weight of inorganic filler, impact modified 8 parts by weight of agent, 2 parts by weight of lubricant, 2 parts by weight of stabilizer, 2 parts by weight of compatibilizer, and 1 part by weight of processing aid.

[0066] The raw material of foam layer 4: the raw material of foam layer 4 is divided into A component (being the first prepolymer) formula: two kinds of polyether polyols, the first polyether polyol 37 weight parts; The second polyether polyol 16 parts by weight of polyhydric alcohol; 1 part by weight of catalyst; 0.9 parts by weight of silicone oil; 3 parts by weight of foaming agent; 0.3 parts by weight of lubricant; 9 parts by weight of flame retardant; 10 parts by weight of inorganic filler; Polymer) formula: ...

Embodiment 2

[0094] This embodiment produces as Figure 8 The preparation method and raw materials of the composite plate shown are basically the same as those in Example 1. The difference is that: using Figure 7 Extrusion die shown and as Figure 9 Metal profile 2 shown. Figure 7 The metal profile 2 with figure 1 The position of the metal profile 2 in the composite panel is different, and the web of the metal profile 2 is bonded to the outer layer of the composite panel (the inner wall close to the surface of the composite panel) of the composite panel. Figure 7 and figure 1 The cross-sections at the same cutting position are basically the same, with only some differences in size.

[0095] Extrusion die: Figure 7 Dies shown can be fabricated Figure 8 Composite panels as shown, such as Figure 7 As shown, the extrusion die 3 includes a first core 34 and three second cores 32 .

[0096] The first core 34 is provided with an external shape that matches the semi-open metal profi...

Embodiment 3

[0103] produce as Figure 10 Shown composite plate, its preparation method and raw material are basically the same as embodiment 2, difference is:

[0104] Extrusion die: the extrusion die 3 is only provided with the first core 34, and the second core 32 is not provided. The first core 34 is provided with an external shape that matches the semi-open metal profile 2, so that when the opening When the shaped metal profile 2 passes through the cavity 33, the open-shaped metal profile 2 is half-enclosed on the outside of the first mold core 34, and the metal profile 2 sent into the cavity 33 is entangled with the first core 34 to form a closed entity. . A gap for injecting molten wood-plastic material is provided between the closed entity and the mold body, so that after the molten wood-plastic material enters the gap, a wood-plastic frame 1 of a composite plate is formed on the periphery of the closed entity, and after cooling and forming, the composite plate There is only one ...

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Abstract

The present invention provides a co-extrusion molding composite board. The co-extrusion molding composite board comprises a wood plastic frame, a foaming layer and a metal profile; the wood plastic frame is provided with a first cavity; the metal profile has an opening; the metal profile is positioned in the first cavity; the wall surface of the first cavity is bonded to the surface of the metal profile; the foaming layer is put in a space enclosed by the first cavity and the metal profile; the foaming layer is bonded to the wall surface of the first cavity and the surface of the metal profile; and the foaming layer is prepared by foaming polyurethane materials. According to the composite board, the internal metal profile effectively provides mechanical strength, the metal profile, the foaming layer and the wood plastic frame are composited and integrated, so that the requirement for strength of the wood plastic part is reduced, the foaming technology can be adopted for materials of the wood plastic frame, wood plastic materials are saved, and heat and sound insulation performance of the composite board applied as a wall board is largely improved.

Description

technical field [0001] The invention relates to a thermal insulation board, in particular to a co-extruded composite board and a preparation method thereof. Background technique [0002] Solid clay bricks are often used for traditional building walls, which is not conducive to the protection of cultivated land; at present, wall materials such as aerated concrete blocks and hollow bricks need to be constructed on site, requiring cement wet work, generating a lot of construction waste on site and consuming a lot of labor. , The dimensional accuracy of the wall is also difficult to control, and the construction period is long, ranging from more than half a year to more than one year or even more than two years to complete. [0003] In order to meet the needs of industrialization, ecology, energy saving and green environmental protection of new buildings, Chinese patent CN102650367A provides metal and resin composite co-extrusion profiles with holes or pits, and the metal profil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/80C08L27/06C08L97/02C08L25/06C08L23/06C08L23/28C08L23/12C08L69/00C08L27/24C08J9/04C08J9/06B29C48/15B29C48/305
Inventor 赵永生
Owner BEIJING NEW BUILDING MATERIALS PLC
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