WO2021120440A1 - 一种复合型材 - Google Patents

一种复合型材 Download PDF

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Publication number
WO2021120440A1
WO2021120440A1 PCT/CN2020/082332 CN2020082332W WO2021120440A1 WO 2021120440 A1 WO2021120440 A1 WO 2021120440A1 CN 2020082332 W CN2020082332 W CN 2020082332W WO 2021120440 A1 WO2021120440 A1 WO 2021120440A1
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Prior art keywords
melt
template
outlet
metal core
core material
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PCT/CN2020/082332
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English (en)
French (fr)
Inventor
唐道远
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安徽森泰木塑集团股份有限公司
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Publication of WO2021120440A1 publication Critical patent/WO2021120440A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties

Definitions

  • the invention relates to a composite profile, which belongs to the technical field of building components.
  • Metal profiles are very common in the construction field, such as aluminum alloy profiles. Bare metal profiles are prone to corrosion; painted metal profiles are also prone to physical damage and damage the coating, which is also prone to corrosion.
  • a better solution is to install a plastic sleeve on the surface of the metal profile, so that the metal profile can be better protected.
  • the plastic sleeve often cracks, which makes it difficult to provide long-term protection.
  • the European Patent Granted Announcement No. EP2620 276 B1 discloses a structural member, which includes an integral extruded part including a metal core and a covering layer containing polyolefin resin and wood flour.
  • a covering layer is formed on the outer surface of the metal core; and an adhesive layer formed between the covering layer and the core, wherein the adhesive layer contains at least ⁇ - A copolymer prepared by polymerizing an olefin and an epoxy-containing unsaturated monomer.
  • the metal core is a hollow-shaped aluminum core with a flat or special-shaped cross-section with a thickness of 1.1-3.0 mm.
  • the thickness of the covering layer is 0.7 ⁇ 5mm
  • the covering layer contains 5-50 parts by weight of wood powder relative to 100 parts by weight of the polyolefin resin
  • the thickness of the adhesive layer is 0.05-0.5mm
  • the adhesive layer and the covering layer are at the same time Extrusion molding.
  • this adhesive layer is greatly affected by the temperature difference.
  • the copolymer prepared by the polymerization of ⁇ -olefin and epoxy-containing unsaturated monomer is prone to degradation and aging.
  • the weather resistance is not good, resulting in a sharp decline in the restraint of the plastic casing after a period of use, causing the plastic casing to crack, and it is difficult to provide long-term protection.
  • the present invention aims to solve the above-mentioned problems, thereby providing a composite profile.
  • the composite profile bonds the plastic coating layer and the metal core material by hot melt adhesive, so that the expansion and contraction freedom of the metal and plastic materials affected by temperature is suppressed, thereby delaying or even avoiding the cracking of the plastic coating layer.
  • the adhesive layer provided by the present invention has the characteristics of good weather resistance, and thus has the performance of providing long-term protection.
  • a composite profile comprising a metal core material and a coating layer; the coating layer is wrapped around the outer periphery of the metal core material, and an adhesive layer is provided between the metal core material and the coating layer; the adhesive The agent layer is obtained by melting and solidifying hot melt adhesive.
  • a mixed layer is formed between the coating layer and the adhesive layer, and the mixed layer is formed by fusing part of the coating layer raw materials and part of the adhesive layer raw materials in a mold.
  • the thickness of the mixed layer is 1-100 ⁇ m.
  • the hot melt adhesive is an ⁇ -olefin copolymer or homopolymer without epoxy groups.
  • the ⁇ -olefin copolymer is a mixture of maleic anhydride grafted PE.
  • the composite profile is prepared by a melt adhesive multi-layer co-extrusion process.
  • Another object of the present invention is to provide a method for preparing the above composite profile.
  • a method for preparing composite profiles includes the following steps:
  • the hot melt adhesive is an ⁇ -olefin copolymer without epoxy groups.
  • the raw materials of the plastic include: 40-50% recycled PE material, 45-48% plant fiber powder, 1.25-8.25% talc, 0.07% carbon black, 0.38% iron red, 0.6% antioxidant, anti-ultraviolet absorption Agent 1.2%, lubricant 1.5%.
  • the mold is assembled and fixed by multiple mold plates, and has a cavity, a melt channel, a melt channel, and a mold outlet;
  • the multiple mold plates include at least an inlet template, a melt template, and a melt.
  • the melt channel includes a melt inlet, a melt cavity, and a melt flow
  • the channel and the melt outlet, the melt inlet, the melt cavity and the melt channel are arranged on the melt template, and the melt outlet is arranged on the melt template or on the melt template;
  • the melt channel It includes a melt inlet, a melt cavity, a melt flow channel and a melt outlet.
  • the melt inlet, the melt cavity and the melt flow channel are arranged on the melt template, and the melt outlet is arranged on the melt template. Or set on the outlet template; a melt casting space is formed between the melt outlet and the cavity; a melt casting space is formed between the melt outlet and the cavity.
  • the outlet template and the melt template are the same die plate.
  • the present invention adopts a melt co-extrusion process to sequentially squeeze hot melt adhesive and plastic on the surface of the metal core material; the composite profile made by the co-extrusion process has the advantages of good forming degree and high interlayer bonding strength;
  • the hot melt adhesive has been co-extruded. Due to the time interval, a certain degree of solidification has occurred, resulting in minimal mixing between the coating layer and the hot melt adhesive layer. , Forming a mixed structure layer, thereby greatly improving the bonding strength between the hot melt adhesive and the coating layer;
  • the setting of this interval can promote the production of the coating layer and the melt layer at their interface A certain degree of mixing; because of this interval, the melt layer is first squeezed on the metal core material, and a certain degree of curing occurs, but the curing is incomplete; because the material components of the coating layer and the melt layer have a certain degree of Therefore, in the high-temperature and high-pressure mold cavity environment, the cladding layer and the melt layer have a certain degree of fusion at their interface; this fusion can promote the cladding layer to be more firmly attached to the metal core material;
  • the hot melt adhesive composed of ⁇ -olefin copolymer without epoxy groups has a good effect on the bonding between the metal core material and the cladding layer. More importantly, the hot melt adhesive has Stronger weather resistance; thereby improving the quality of the composite profile of the present invention, better bonding strength and longer service life;
  • hot melt adhesive can be used as one of the raw materials, and the mold is used for one-time molding; compared to the process of extruding after coating, it has both product quality and ease of process operation. Better results.
  • Figure 1 is a product structure diagram of the present invention
  • Figure 2 is a diagram of the mold structure of the present invention.
  • Figure 3 is a schematic diagram of the structure of the melt template of the mold of the present invention.
  • Figure 4 is a schematic diagram of the structure of the melt template of the mold of the present invention.
  • Figure 5 is a test table of performance results of the present invention.
  • a composite profile includes a metal core material 1 made of aluminum alloy, an adhesive layer 2 formed by hot melt adhesive, and a covering layer 3 made of plastic material.
  • the hot melt adhesive is a mixture of maleic anhydride grafted PE.
  • the mold 4 is assembled and fixed by multiple mold plates, and has a cavity 41, a melt channel 42, a melt channel 43 and a mold outlet 44; the multiple mold plates are at least It includes an import template 401, a melt template 402, a melt template 403, and an exit template 404; the end face of the import template 401 is provided with an inlet for the metal core material 1, and the mold outlet 44 is set on the end face of the outlet template 404
  • the melt channel 42 includes a melt inlet 42a, a melt cavity 42b, a melt flow channel 42c and a melt outlet.
  • the melt inlet 42a, the melt cavity 42b, the melt flow channel 42c and the melt outlet are arranged in the melt
  • the melt channel 43 includes a melt inlet 43a, a melt cavity 43b, a melt flow channel 43c and a melt outlet, the melt inlet 43a, the melt cavity 43b and the melt outlet are arranged in the melt
  • a melt casting space 43e is formed between the melt outlet and the cavity 41;
  • a melt casting space 42e is formed between the melt outlet and the cavity 41.
  • the first extruder is docked with the melt channel 42 of the mold; the second extruder is docked with the melt channel 42 of the mold;
  • the maleic anhydride grafted PE homopolymer (hot-melt adhesive) into the first extruder.
  • the molten hot-melt adhesive is obtained, and the molten hot-melt adhesive is Squeeze into the melt channel 42 and exit from the melt outlet of the mold 4, enter the melt casting space 42e, and cover the outer peripheral surface of the hot metal core material 1 in the melt casting space 42e to form a glue-containing metal Core material; as the metal core material 1 is fed, the glue-containing metal core material is also fed forward at the same time; the temperature of the hot melt adhesive in the melt channel 42 is controlled to 210°C; the screw speed is when the hot melt adhesive is extruded 5.5r/min;
  • the molten raw materials are obtained.
  • the molten raw materials are extruded into the melt channel 43 and are led out from the melt outlet of the die 4. Enter the melt casting space 43e, and cover the outer peripheral surface of the rubber-containing metal core material in the melt casting space 43e to form the blank of the composite profile; as the metal core material 1 is fed, the blank is also fed forward at the same time ;
  • the blank of the composite profile is extruded from the exit 44 of the die to form the composite profile.
  • Recycled PE material 42%, wood powder 46%, talc powder 8.25%, carbon black 0.07%, iron red 0.38%, antioxidant 0.6%, anti-ultraviolet absorbent 1.2%, lubricant 1.5%.
  • test report is shown in Figure 5:

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  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

本发明涉及一种复合型材，属于建筑构件技术领域。一种复合型材，包括金属芯材和包覆层；所述包覆层包覆在所述金属芯材的外周，并且金属芯材和包覆层之间具有胶黏剂层；所述胶黏剂层由热熔胶熔融固化所得。本发明采用熔融共挤工艺，依次在金属芯材表面上挤包上热熔胶和塑料；通过共挤工艺制得的复合型材具有成型度好，层间结合强度高的优点。

Description

一种复合型材 技术领域
本发明涉及一种复合型材，属于建筑构件技术领域。
背景技术
金属型材在建筑领域使用非常普遍，如铝合金型材等。裸露的金属型材容易发生锈蚀；经过涂装处理的金属型材也容易受到物理性的损伤，使涂层破坏，这样也容易发生锈蚀。一个较优的方案是在金属型材外表安装一个塑料的套管，这样就能使金属型材受到较好的保护。但由于金属和塑料的材料性质不同，在环境温度不同时，由于受温度影响的胀缩不同步，使得塑料套管经常开裂，从而难以长久地提供保护。
授权公告号为EP2620 276 B1的欧洲专利，公开了一种构造构件，它包括整体挤压成型件，所述整体挤压成型件包括金属芯，包含聚烯烃树脂和木粉的覆盖层，所述覆盖层形成在所述金属芯的外表面上；以及粘合剂层，所述粘合层形成在所述覆盖层与所述芯之间，其中所述粘合剂层包含通过至少将α-烯烃和含环氧基的不饱和单体聚合而制备的共聚物，所述金属芯为中空形状的铝芯，平板状或异形截面，厚度为1.1～3.0mm，所述覆盖层的厚度为0.7～5mm，所述覆盖层含有相对于100重量份的聚烯烃树脂5～50重量份的木粉，所述粘合层的厚度为0.05～0.5mm，所述粘合层与所述覆盖层同时挤出成型。在具体的使用实践中发现，这种粘合剂层受温差影响较大，尤其在我国北方地区，α-烯烃和含环氧基的不饱和单体聚合而制备的共聚物容易发生降解和老化，耐候性不佳，致使使用一段时间后对于塑料套管的约束性急剧下降，使塑料套管开裂，而难以长久地提供保护。
发明概述
技术问题
问题的解决方案
技术解决方案
本发明要解决上述问题，从而提供一种复合型材。该复合型材通过热熔胶将塑料材质的包覆层与金属芯材粘结起来，使得金属和塑料材料受温度影响的胀缩自由度得到抑制，从而延缓甚至避免塑料包覆层的开裂。并且，本发明提供的胶黏剂层具有耐候性好的特点，从而具备长久提供保护的性能。
本发明解决上述问题的技术方案如下：
一种复合型材，包括金属芯材和包覆层；所述包覆层包覆在所述金属芯材的外周，并且金属芯材和包覆层之间具有胶黏剂层；所述胶黏剂层由热熔胶熔融固化所得。
作为优选，所述包覆层与胶黏剂层之间形成一混融层，所述混融层由部分的包覆层原料和部分的胶黏剂层原料在模具中融合形成。
作为优选，所述混融层的厚度为1～100μm。
作为优选，所述热熔胶是不含环氧基团的α-烯烃共聚物或均聚物。
作为优选，所述α-烯烃共聚物为马来酸酐接枝PE的混合物。
作为优选，所述复合型材通过熔胶多层共挤工艺制得。
本发明的另一个目的是提供上述复合型材的一种制备方法。
一种复合型材的制备方法，包括以下步骤：
a、将金属芯材预热，形成热态的金属芯材，通入到模具的型腔中；
b、使热熔胶以熔融形态出现在模具的熔胶通道中；并将热熔胶从熔胶通道的出料口挤出，使热熔胶挤包在热态的金属芯材上；形成含胶金属芯材；
c、使塑料以熔融形态出现在模具的熔料通道中；并将塑料从熔料通道的出料口挤出，使塑料挤包在含胶金属芯材上；形成复合型材的坯料；
d、将复合型材的坯料从模具的出口挤出，形成复合型材。
作为优选，所述热熔胶是不含环氧基团的α-烯烃共聚物。
作为优选，塑料的原料包括：再生PE料40～50％、植物纤维粉45～48％、滑石粉1.25～8.25％、炭黑0.07％、铁红0.38％、抗氧剂0.6％、抗紫外吸收剂1.2％、润滑剂1.5％。
作为优选，所述模具由多块模具板拼装后固定而成，具有型腔、熔胶通道、熔料通道和模具出口；所述的多个模具板至少包括进口模板、熔胶模板、熔料模 板和出口模板；所述进口模板的端面上设有金属芯材的进口，模具出口设置在所述的出口模板的端面上；所述熔胶通道包括熔胶进口、熔胶腔、熔胶流道和熔胶出口，熔胶进口、熔胶腔和熔胶流道设置在所述的熔胶模板上，熔胶出口设置在熔胶模板上或者设置在熔料模板上；所述熔料通道包括熔料进口、熔料腔、熔料流道和熔料出口，所述熔料进口、熔料腔和熔料流道设置在所述的熔料模板上，熔料出口设置在熔料模板上或者设置在出口模板上；熔料出口与型腔之间形成一熔料流延空间；熔胶出口与型腔之间形成一熔胶流延空间。
作为优选，所述出口模板和熔料模板为同一块模具板。
发明的有益效果
有益效果
本发明具有以下有益效果：
1、本发明采用熔融共挤工艺，依次在金属芯材表面上挤包上热熔胶和塑料；通过共挤工艺制得的复合型材具有成型度好，层间结合强度高的优点；
2、本发明在进行包覆层的共挤时，热熔胶已经完成共挤，由于时间间隔，产生了一定程度的固化，使得包覆层与热熔胶层之间产生极小的混融，形成一混融结构层，从而大大提升了热熔胶与包覆层之间的结合强度；
3、本发明的模具中，通过将熔料流延空间和熔胶流延空间设置为一定的间隔，0.5～2cm，这个间隔的设置，可促使包覆层与熔胶层在它们的界面产生一定程度的混融；因为这个间隔，熔胶层先挤包在金属芯材上，并产生了一定程度的固化，但固化不完全；由于包覆层与熔胶层的材料组分本身具有一定的相似性，因此在高温高压的模腔环境中，包覆层与熔胶层在它们的界面产生一定程度的融合；这种融合可促使包覆层更牢固地附着在金属芯材上；
4、经过验证，由不含环氧基团的α-烯烃共聚物构成的热熔胶，对于金属芯材和包覆层的粘结具有良好的效果，更重要的是，该热熔胶具有较强的耐候性；从而提高了本发明复合型材的品质，更好的粘结强度和更久的使用寿命；
5、本发明的成型工艺，可将热熔胶当做其中一种原料进行使用，利用模具一次成型；相对于涂胶后再进行挤包的工艺，无论在产品质量和工艺操作便捷性上都具有更好的效果。
对附图的简要说明
附图说明
图1是本发明的产品结构图；
图2是本发明的模具结构图；
图3是本发明的模具的熔胶模板的结构示意图；
图4是本发明的模具的熔料模板的结构示意图；
图5是本发明的性能结果测试表；
图中，1-金属芯材，2-包覆层，3-胶黏剂层，4-模具；
41-型腔，42-熔胶通道，43-熔料通道，44-模具的出口；
42a-熔胶进口，42b-熔胶腔，42c-熔胶流道，42e-熔胶流延空间；
43a-熔料进口，43b-熔料腔，43c-熔料流道，43e-熔料流延空间；
401-进口模板，402-熔胶模板，403-熔料模板，404-进口模板。
发明实施例
本发明的实施方式
以下结合附图对本发明进行进一步的说明。
本具体实施方式仅仅是对本发明的解释，并不是对本发明的限制，本领域技术人员在阅读了本发明的说明书之后所做的任何改变，只要在权利要求书的范围内，都将受到专利法的保护。
如图1所示，一种复合型材，包括铝合金材质的金属芯材1，热熔胶形成的胶黏剂层2和塑料材质的包覆层3。本实施例中，热熔胶为马来酸酐接枝PE的混合物。
制造上述复合型材的模具结构具体如下：
如图2-4所示，所述模具4由多块模具板拼装后固定而成，具有型腔41、熔胶通道42、熔料通道43和模具出口44；所述的多个模具板至少包括进口模板401、熔胶模板402、熔料模板403和出口模板404；所述进口模板401的端面上设有金属芯材1的进口，模具出口44设置在所述的出口模板404的端面上；所述熔胶通道42包括熔胶进口42a、熔胶腔42b、熔胶流道42c和熔胶出口，熔胶进口42a、熔胶腔42b、熔胶流道42c和熔胶出口设置在熔胶模板402上；所述熔料通道43包括熔 料进口43a、熔料腔43b、熔料流道43c和熔料出口，所述熔料进口43a、熔料腔43b和熔料出口设置在熔料模板403上；熔料出口与型腔41之间形成一熔料流延空间43e；熔胶出口与型腔41之间形成一熔胶流延空间42e。
本实施例复合型材的制备方法如下：
(1)准备工作：
采用两台挤出机，第一台挤出机与模具的熔胶通道42对接；第二台挤出机与模具的熔料通道42对接；
(2)导入金属芯材：
将金属芯材1预热，形成热态的金属芯材，将之导入到模具4的型腔中；
(3)熔胶挤出：
将马来酸酐接枝PE的均聚物(热熔胶)投入第一台挤出机中，经第一台挤出机的作用，得到熔融态的热熔胶，熔融态的热熔胶被挤入熔胶通道42，从模具4的熔胶出口导出，进入熔胶流延空间42e，在熔胶流延空间42e中覆盖在热态的金属芯材1的外周表面，形成一含胶金属芯材；随着金属芯材1的送进，含胶金属芯材也同时向前送进；热熔胶在熔胶通道42中的温度控制为210℃；热熔胶挤出时，螺杆转速为5.5r/min；
(4)熔料挤出：
将原料及添加剂投入第二台挤出机中，经第二台挤出机的作用，得到熔融态的原料，熔融态的原料被挤入熔料通道43，从模具4的熔料出口导出，进入熔料流延空间43e，在熔料流延空间43e中覆盖在含胶金属芯材的外周表面，形成复合型材的坯料；随着金属芯材1的送进，坯料也同时向前送进；
(5)挤出：
将复合型材的坯料从模具的出口44挤出，形成复合型材。
本实施例中，原料及其添加剂的配方如下：
再生PE料42％、木粉46％、滑石粉8.25％、炭黑0.07％、铁红0.38％、抗氧剂0.6％、抗紫外吸收剂1.2％、润滑剂1.5％。
对本实施例的产品进行检测，具体如下：
180H高温水煮低温冻融：
将试样长度、宽度、厚度、质量测试完毕记录，浸于温度为60℃水中12H，紧接着把试样放在温度为(-35±1)℃的超低温冰箱中24H冷冻，这个过程组成一个周期，循环五个周期后放入常温水中，23℃±2℃，浸泡15分钟，然后放置2H；检测其性能；
测试报告如图5所示：
结果显示：使用热熔胶后，产品的胶合强度达到国家标准的三倍以上、高温水煮低温冻融符合要求。

Claims (8)

  1. 一种复合型材，包括金属芯材(1)和包覆层(2)；其特征在于：所述包覆层(2)包覆在所述金属芯材(1)的外周，并且金属芯材(1)和包覆层(2)之间具有胶黏剂层(3)；形成所述胶黏剂层(3)的材料为热熔胶。
  2. 根据权利要求1所述的一种复合型材，其特征在于：所述热熔胶是不含环氧基团的α-烯烃共聚物或均聚物。
  3. 根据权利要求2所述的一种复合型材，其特征在于：所述α-烯烃共聚物为马来酸酐接枝PE的混合物。
  4. 根据权利要求1所述的一种复合型材，其特征在于：所述复合型材是通过熔胶共挤工艺制得的。
  5. 一种复合型材的制备方法，包括以下步骤：
    a、将金属芯材(1)预热，形成热态的金属芯材，通入到模具(4)的型腔中；
    b、使热熔胶以熔融形态出现在模具(4)的熔胶通道中；并将热熔胶从熔胶通道的出料口挤出，使热熔胶挤包在热态的金属芯材(1)上；形成含胶金属芯材；
    c、使塑料以熔融形态出现在模具(4)的熔料通道中；并将塑料从熔料通道的出料口挤出，使塑料挤包在含胶金属芯材上；形成复合型材的坯料；
    d、将复合型材的坯料从模具的出口(44)挤出，形成复合型材。
  6. 根据权利要求5所述的一种型材的制备方法，其特征在于：所述热熔胶是不含环氧基团的α-烯烃共聚物。
  7. 根据权利要求5所述的一种型材的制备方法，其特征在于：所述模具(4)由多块模具板拼装后固定而成，具有型腔(41)、熔胶通道(42)、熔料通道(43)和模具出口(44)；所述的多个模具板至少包括进口模板(401)、熔胶模板(402)、熔料模板(403)和出口模板(404)；所述进口模板(401)的端面上设有金属 芯材(1)的进口，模具出口(44)设置在所述的出口模板(404)的端面上；所述熔胶通道(42)包括熔胶进口(42a)、熔胶腔(42b)、熔胶流道(42c)和熔胶出口，熔胶进口(42a)、熔胶腔(42b)和熔胶流道(42c)设置在所述的熔胶模板(402)上，熔胶出口设置在熔胶模板(402)上或者设置在熔料模板(403)上；所述熔料通道(43)包括熔料进口(43a)、熔料腔(43b)、熔料流道(43c)和熔料出口，所述熔料进口(43a)、熔料腔(43b)和熔料流道(43c)设置在所述的熔料模板(403)上，熔料出口设置在熔料模板(403)上或者设置在出口模板(404)上；熔料出口与型腔(41)之间形成一熔料流延空间(43e)；熔胶出口与型腔(41)之间形成一熔胶流延空间(42e)。
  8. 根据权利要求5所述的一种型材的制备方法，其特征在于：所述出口模板(404)和熔料模板(403)为同一块模具板。
PCT/CN2020/082332 2019-12-18 2020-03-31 一种复合型材 WO2021120440A1 (zh)

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