DE202021102329U1 - Two-layer laminate floor - Google Patents

Abstract

Two-layer laminate flooring, comprising a hard core layer (2) and an elastic surface layer (1) which envelops the hard core layer (2), characterized in that an adaptation structure is arranged between the elastic surface layer (1) and the hard core layer (2), wherein the matching structure includes a plurality of unit elements formed on a surface of the hard core layer and a plurality of correspondence elements formed on a surface of the surface elastic layer, the unit element being a stripe structure having a convex shape or a groove shape in cross section , which is arranged along the longitudinal direction of the floor,
wherein the correspondence element is a convex matching component having a groove shape in cross section that covers the convex portion when the cross section of the unit element has a convex shape,
wherein the correspondence element is a groove fitting component having a convex shape in cross section, which is embedded in the groove when the cross section of the unit element has a groove shape,
wherein the material of the elastic surface layer is selected from one or more of natural rubber, synthetic rubber or thermoplastic elastomer,
wherein the hard core layer is selected from a metal profile, a hot extruded solid sheet made of wood-plastic, a hot-extruded hollow sheet made of wood-plastic, a hard-foamed self-skinning sheet, a hard-foamed coextrusion-coated sheet and a hard-foamed coextrusion-coated reinforcement sheet.

Description

Technical area

The present utility model relates to a floor, in particular to a two-layer laminate floor in the technical field of floor production technology.

State of the art

Elastomers such as rubber, synthetic rubber and thermoplastic elastomers have good contact and have the properties of soft quality and good elasticity, which makes the plate with the surface of the elastomeric material an incomparable advantage in decoration over other polymeric materials.

In the patent application with the international number WO2018 / 154287 A1 discloses a low heat absorbing flame retardant polyurethane wood imitation material, and the produced polyurethane sheet has the properties of a flame retardant surface layer, low heat absorption, antibacterial and soft touch. However, the material is a polyurethane foam material. When it is used as a floor, the polyurethane sheet has a low flexural strength and a high material cost. At the same time, since polyurethane is a flammable material, a large amount of flame retardant is required to meet the requirements of use.

Content of the present utility model

The present utility model aims to solve the above problems, whereby a two-layer laminate floor is provided.

• Zweischichtiger Laminatboden, umfassend eine harte Kernschicht und eine elastische Oberflächenschicht, die die harte Kernschicht umhüllt, dadurch gekennzeichnet, dass eine Anpassungsstruktur zwischen der elastischen Oberflächenschicht und der harten Kernschicht angeordnet ist, wobei die Anpassungsstruktur eine Vielzahl von Einheitselementen, die auf einer Oberfläche der harten Kernschicht ausgebildet sind, und eine Vielzahl von Korrespondenzelementen umfasst, die auf einer Oberfläche der elastischen Oberflächenschicht ausgebildet sind, wobei das Einheitselement eine Streifenstruktur mit einer konvexen Form oder einer Rillenform im Querschnitt ist, die entlang der Längsrichtung des Bodens angeordnet ist,
• wobei das Korrespondenzelement ein konvexes Anpassungskomponent mit einer Rillenform im Querschnitt ist, das den konvexen Abschnitt bedeckt, wenn der Querschnitt des Einheitselements eine konvexe Form aufweist,
• wobei das Korrespondenzelement ein Rillenpassungskomponent mit einer konvexen Form im Querschnitt ist, das in die Rille eingebettet ist, wenn der Querschnitt des Einheitselements eine Rillenform aufweist,
• wobei das Material der elastischen Oberflächenschicht aus einem oder mehreren von Naturkautschuk, synthetischem Kautschuk oder thermoplastischem Elastomer ausgewählt ist,
• wobei die harte Kernschicht aus einem Metallprofil, einer heiß extrudierten Vollplatte aus Holz-Kunststoff, einer heiß extrudierten Hohlplatte aus Holz-Kunststoff, einer hartgeschäumten selbsthäutenden Platte, einer hartgeschäumten koextrusionsbeschichteten Platte und einer hartgeschäumten koextrusionsbeschichteten Verstärkungsplatte ausgewählt ist.

The technical solutions for solving the above problems in the present utility model are as follows:

• Two-layer laminate flooring, comprising a hard core layer and an elastic surface layer which envelops the hard core layer, characterized in that an adaptation structure is arranged between the elastic surface layer and the hard core layer, the adaptation structure having a plurality of unit elements which are on a surface of the hard core layer and comprising a plurality of correspondence elements formed on one surface of the surface elastic layer, the unit element being a stripe structure having a convex shape or a groove shape in cross section, which is arranged along the lengthwise direction of the floor,
• wherein the correspondence element is a convex matching component having a groove shape in cross section that covers the convex portion when the cross section of the unit element has a convex shape,
• wherein the correspondence element is a groove fitting component having a convex shape in cross section, which is embedded in the groove when the cross section of the unit element has a groove shape,
• wherein the material of the elastic surface layer is selected from one or more of natural rubber, synthetic rubber or thermoplastic elastomer,
• wherein the hard core layer consists of a metal profile, a hot extruded one Solid sheet made of wood-plastic, a hot-extruded hollow sheet made of wood-plastic, a hard-foamed self-skinning sheet, a hard-foamed coextrusion-coated sheet and a hard-foamed coextrusion-coated reinforcement sheet is selected.

In the above technical solution of the present utility model, the elastic surface layer and the hard core layer are connected by the adaptation structure, so that the elastic surface layer and the hard core layer no longer need to have good compatibility in the selection of materials, which can significantly expand the selection range of the material. The materials selected from the hard core layer are above the Shore hardness of 80HD, such as polyethylene, polyethylene mixed with wood powder, polyvinyl chloride, polyvinyl chloride, mixed with wood powder or stone powder, and commonly used metals. At the same time, in order to reduce the total weight of the floor, the hard core layer can also be processed into a hollow structure or the hard core layer into a hard-foamed filling body. Furthermore, the material of the hard core layer can consist of a metal profile, a hot extruded solid sheet made of wood-plastic, a hot-extruded hollow sheet made of wood-plastic, a hard-foamed self-skinning sheet, a hard-foamed coextrusion-coated sheet and a hard-foamed, coextrusion-coated reinforcement sheet.

The selection of the elastic surface layer can be one or more of natural rubber, synthetic rubber, or thermoplastic elastomer.

For ease of description, the surface on which the hard core layer is in contact with the surface elastic layer is recorded as surface A, and the surface on which the surface elastic layer is in contact with the hard core layer is recorded as surface B. . There are a multitude of unit elements on surface A and a multitude of correspondence elements on surface B.

In the above technical solution of the present utility model, a metal profile is a profile suitable for use as a hard core layer of a laminate floor by a metal working method such as an aluminum alloy profile, and its surface and side surfaces are in direct contact with the elastic surface layer.

In the above technical solution of the present utility model, the hot extruded wood-plastic solid sheet refers to a solid sheet made by mixing a resin raw material, a vegetable fiber powder and a processing aid by a conventional hot extrusion method. Commonly used plastics in this sheet are polyolefins, more commonly such as polyethylene and polypropylene.

In the above technical solution of the present utility model, the hot-extruded hollow wood-plastic sheet is the same as the raw materials used in the hot-extruded solid wood-plastic sheet, but the processing forms are different. Since the mold has a mandrel protruding from the mold opening, the plate forms a hollow structure at the corresponding position of the mandrel.

In the above technical solution of the present utility model, the hard foamed self-skinning sheet is a hard sheet made by a foam extrusion method through a raw material containing a resin and a foaming agent. The plate has a self-skinning layer and the thickness of the self-skinning layer is normally between 0.1 and 1.0 mm. Since the inventor considers that the mechanical properties of the hard PU foamed sheet are low and the cost is high, the hard foamed self-skinning sheet in the present utility model specifically refers to the hard PVC foamed self-skinning sheet made of PVC resin .

In the above technical solution of the present utility model, the hard foamed coextrusion coated plate is realized by coextruded wrapping a hard plastic layer based on the above-mentioned hard foamed self-skinning plate. This is due to the thin thickness of the self-skinning layer of 0.1 to 1.0 mm, which must be improved in its mechanical properties.

In the above technical solution of the present utility model, the hard foamed coextrusion coated reinforcement plate is a reinforcement layer which is realized by adding a reinforcement layer between the coextrusion coated layer of the plate and the hard foamed core layer on the basis of the hard foamed coextrusion coated plate, which has better mechanical properties than the above-mentioned hard foamed one Has coextrusion coated plate. The reinforcement layer is formed by impregnating the resin with a glass fiber mesh and then curing it. In consideration of the convenience of processing, it is preferable not to fully cure and to have some flexibility in manufacture, for example, the degree of cure may be 92-98%.

As the above technical solution, it is preferably provided that the adaptation structure also comprises a plurality of first connection units and a plurality of second connection units, the first connection unit being formed by a surface on which the hard core layer is in contact with the elastic surface layer and between two adjacent unit elements is arranged, wherein the second connection unit is formed by a surface on which the elastic surface layer is in contact with the hard core layer and is disposed between two adjacent correspondence elements, the first connecting unit and the second connecting unit being appropriately disposed.

As the above technical solution, it is preferably provided that the convex adaptation component with a groove shape in cross section has a shrink structure when the cross section of the unit element has a convex shape, wherein the unit element with a convex shape in cross section has a shrink structure when the cross section of the unit element has a Has groove shape.

In the above technical solution of the present utility model, a member having a horizontal surface has a groove portion, and the inner space of the groove portion is wide and its connection with the horizontal surface is narrower. Therefore, a contraction structure formed at the joint is called a shrink structure, so that it is difficult to remove the second member having the corresponding structure from the groove portion having the shrink structure after it is matched with it, thereby reducing the bonding force of the member with the second member is greatly improved.

As the above technical solution, it is preferably provided that a surface in which the hard core layer is in contact with the elastic surface layer, and a surface in which the elastic surface layer is in contact with the hard core layer, with the unit element and the correspondence element on the Transitional connection of the horizontal and vertical directions of the floor is provided.

As the above technical solution, it is preferably provided that the surface of the first connection unit and the second connection unit is a jagged surface in cross section, flat or sawtooth-shaped. The surfaces of the first connection unit and the second connection unit are flat, which is a universal setting. When the portion of the surface of the first connection unit and the second connection unit is a serrated surface, the contact area of the surface A and the surface B can be significantly improved, and the resistance between the elastic surface layer and the hard core layer generated by horizontal forces, can be significantly improved, thereby improving the bonding force and the resistance to elongation between the elastic surface layer and the hard core layer.

As the above technical solution, it is preferably provided that the hard foamed self-skinning plate consists of a hard foamed core which is formed by a first foamed raw material that contains a first resin, and a self-skinning layer that is also formed by a first foamed raw material that coated the hard foamed core.

As the above technical solution, it is preferably provided that the hard foamed coextrusion-coated plate consists of a hard foamed core, a self-skinning layer which covers the hard foamed core, and a coextrusion housing which covers the self-skinning layer, the hard foamed core and the self-skinning layer be formed by a first raw material containing a first resin and a foaming agent, the coextrusion housing being formed by a second raw material containing a second resin and not containing a foaming agent, wherein the second resin and the first resin may be the same or different.

In the above technical solution of the present utility model it is provided that the hard-foamed coextrusion-coated reinforcement plate consists of a hard-foamed core, a glass fiber reinforcement layer and a coextrusion housing, the glass fiber reinforcement layer being arranged between the hard foamed core and the coextrusion housing, the hard foamed core and the self-skinning layer through forming a first raw material containing a first resin and a foaming agent, the coextrusion case being formed by a second raw material containing a second resin and not containing a foaming agent, the glass fiber reinforcing layer being formed by hardening the glass fiber mesh after impregnating with resin, wherein the second resin and the first resin can be the same or different.

In the above technical solution of the present utility model, it is provided that the foaming agent contains both a chemical foaming agent, as it is added to the resin raw material in the form of a material, and a physical foaming agent. When not added to the raw material, the supercritical carbon dioxide fluid is introduced through another inlet of the extruder and then mixed with the resin raw material within the extruder.

In the above technical solution of the present utility model, the mechanical strength of the hard core layer is improved by arranging a glass fiber reinforcing layer in the hard core layer, and finally the mechanical properties of the entire plate are improved, in particular the flexural modulus of the entire plate is improved, so that the entire panel still has good flexural strength at larger spans, which can significantly reduce the amount of keel and bring great convenience to installation, transportation and cost control.

In the above technical solution of the present utility model, the first resin is a PVC resin and the second resin is selected from one or more of PVC, ASA, PE, PC, PP, ABS and the like.

1. 1. Das vorliegende Gebrauchsmuster stellt eine Verbundstruktur eines hartgeschäumten Kernkörpers und eines Vorläufers der elastischen Oberflächenschicht bereit, das heißt, eine Anpassungsstruktur ist zwischen der elastischen Oberflächenschicht und der hartgeschäumten Kernschicht angeordnet. Basierend auf dieser Struktur kann der Vorläufer der elastischen Oberflächenschicht den hartgeschäumten Kernkörper besser beschichten, so dass das vorliegende Gebrauchsmuster die Vorteile einer hartgeschäumten Kernschicht und einer elastischen Oberflächenschicht, einer hohen Druckfestigkeit und einer guten Oberflächenkontaktbarkeit aufweist.
2. 2. In dem vorliegenden Gebrauchsmuster wird die Druckfestigkeit des Laminatbodens weiter verbessert, indem eine Glasfaserverstärkungsschicht innerhalb der hartgeschäumten Kernschicht angeordnet wird, und der Biegemodul des Laminatbodens wird signifikant verbessert, wodurch die Spannweite erhöht wird, die Menge an Kiel verringert wird, die Verlegekosten reduziert werden und die Verlegeeffizienz verbessert wird, wenn der Boden verlegt wird. Noch wichtiger ist, dass das vorliegende Gebrauchsmuster bessere mechanische Eigenschaften bei hohen Temperaturen aufweist und die Biegefestigkeit bei 80 °C über 20 MPa halten kann.
3. 3. Das vorliegende Gebrauchsmuster stellt einen hartgeschäumten Kernkörper bereit, insbesondere einen hartgeschäumten Kernkörper mit einer Glasfaserverstärkungsschicht. Der hartgeschäumte Kernkörper des vorliegenden Gebrauchsmusters kann dem Laminatboden eine höhere Druckfestigkeit, eine höhere Biegebruchlast und einen höheren Biegeelastizitätsmodul verleihen.

In summary, the present utility model has the following beneficial effects:

1. 1. The present utility model provides a composite structure of a hard foamed core body and a precursor of the elastic surface layer, that is, a conforming structure is arranged between the elastic surface layer and the hard foamed core layer. Based on this structure, the precursor of the elastic surface layer can coat the hard foamed core body better, so that the present utility model has advantages of a hard foamed core layer and an elastic surface layer, high compressive strength and good surface contactability.
2. 2. In the present utility model, the compressive strength of the laminate floor is further improved by arranging a glass fiber reinforcement layer within the rigid foamed core layer, and the flexural modulus of the laminate floor is significantly improved, thereby increasing the span, reducing the amount of keel, reducing the laying costs and the laying efficiency is improved when laying the floor. More importantly, the present utility model has better mechanical properties at high temperatures and can keep the flexural strength at 80 ° C above 20 MPa.
3. 3. The present utility model provides a hard foamed core body, in particular a hard foamed core body with a glass fiber reinforcement layer. The hard-foamed core body of the present utility model can give the laminate floor a higher compressive strength, a higher flexural rupture load and a higher flexural modulus of elasticity.

Figure list

• 1 Fig. 13 is a schematic diagram of the structure of the present utility model.
• 2 Fig. 13 is a schematic diagram of the mold structure of the present utility model.
• 3 Fig. 13 is a schematic diagram of the outer end face of the formation plate of the first flow channel of the present utility model.

List of reference symbols

1

elastic surface layer,

2

hard core layer,

201

Coextrusion housing,

202

Fiberglass reinforcement layer,

203

hard foamed core,

10

Main flow channel,

20th

Reinforcement material channel,

30th

Coextrusion flow channel,

11

Main flow duct outlet,

21

first channel,

22nd

second channel,

211

first outlet,

221

second outlet,

31

Surface outlet,

201

Entrance section,

202

Exit section,

301

Feed section,

302

Casting section,

303

Mold section,

3011

Branching channel,

3021

inclined channel.

Detailed embodiments

The present utility model is explained in more detail below in conjunction with the drawings.

The specific embodiment is only an explanation of the present utility model and is not a limitation of the present utility model. Any changes made by a person skilled in the art after reading the description of the present utility model are protected by patent law as long as they lie within the scope of the claims.

Embodiment 1

Two-layer laminate flooring comprising a hard core layer 2 and an elastic surface layer 1 Made of PU material, the elastic surface layer 1 the hard core layer 2 wrapped at least on a top and side surface of part of the floor, as in FIG 1 shown.

Whereby an adaptation structure between the elastic surface layer 1 and the hard core layer 2 is arranged, wherein the matching structure comprises a plurality of unit elements formed on a surface A, and a plurality of correspondence elements formed on a surface B, and a plurality of connecting elements.

Where the surface A is a surface on which the hard core layer 2 in contact with the elastic surface layer 1 wherein the surface B is a surface on which the elastic surface layer 1 in contact with the hard core layer 2 stands.

Wherein the connection unit comprises a first connection unit arranged between two adjacent unit elements and a second connection unit arranged between two adjacent correspondence elements, the unit element being a strip structure with a groove shape in cross section, which is arranged along the longitudinal direction of the floor, wherein the correspondence element is a groove fitting component having a convex shape in cross section embedded in the groove, the first connection unit and the second connection unit being mated, the unit element having a convex shape in cross section having a shrink structure.

According to the present embodiment it is provided that the hard core layer 2 is a hard foamed coextrusion coated reinforcement plate, wherein the hard foamed coextrusion coated reinforcement plate consists of a hard foamed core 203 , a glass fiber reinforcement layer 202 and a co-extrusion housing 201 consists, the fiberglass reinforcement layer 202 between the hard foamed core 203 and the coextrusion housing 201 is arranged, wherein the rigid foamed core 203 and the self-skinning layer is formed by a first raw material containing a first resin and a foaming agent, the co-extrusion case 201 is formed by a second raw material which contains a second resin and contains no foaming agent, the glass fiber reinforcing layer being formed by hardening the glass fiber mesh fabric after impregnation with resin, the thickness of the coextrusion case being about 2 mm.

According to the present embodiment, it is provided that the first resin is a PVC resin, the foaming agent being an AC foaming agent, the second resin also being a PVC resin.

1. a. Eine Gießform wird bereitgestellt, und das Trennmittel Magnesiumstearat 5 g und der Beschichtungslack, der Nano-Aluminiumoxid enthält, werden nacheinander in die Gießform gesprüht, und nach dem Trocknen werden das Polyetherpolyol 2200 g, das Talkpulver 15 g, das Isocyanat 600 g und das Härtungsmittel 4 g für 5 Minuten gemischt und in die Gießform gegossen, wobei ein Vorläufer der elastischen Oberflächenschicht mit einer Dicke von etwa 2 cm in einer Gießform mit einer Tiefe von etwa 3 cm gebildet wird. Der Vorläufer der elastischen Oberflächenschicht ist flüssig.
2. b. In die Gießform wird eine harte Kernschicht 2 mit Rillen an der Ober- und Seitenfläche eingebracht.
3. c. Nachdem die harte Kernschicht 2 abgeflacht ist, wird ein Druck auf sie ausgeübt, um ihre Position in der Gießform zu verringern, so dass der Vorläufer der elastischen Oberflächenschicht entlang der inneren Seitenwand der Gießform und des Spaltes um das Profil der harten Kernschicht ansteigt und zumindest die Rillen auf der Seitenoberfläche der harten Kernschicht durchdringt, so dass die Dicke des Vorläufers der elastischen Oberflächenschicht von 2 cm auf etwa 0,5 cm reduziert wird.
4. d. Der Druck, der in Schritt c ausgeübt wird, wird aufrechterhalten, und der Druck wird für 20-25 Minuten aufrechterhalten, so dass der Vorläufer der elastischen Oberflächenschicht in der Gießform gehärtet wird, um den zweischichtigen Laminatboden zu erhalten.

A method of manufacturing the above-described two-layer laminate flooring, comprising the following steps:

1. a. A mold is provided, and the release agent magnesium stearate 5 g and the coating varnish containing nano-alumina are sprayed into the mold one by one, and after drying, the polyether polyol becomes 2200 g, the talc powder 15 g, the isocyanate 600 g and the curing agent 4 g mixed for 5 minutes and poured into the mold, forming a precursor of the elastic surface layer with a thickness of about 2 cm in a mold with a depth of about 3 cm. The precursor of the elastic surface layer is liquid.
2. b. A hard core layer is placed in the mold 2 introduced with grooves on the upper and side surfaces.
3. c. After the hard core layer 2 is flattened, pressure is applied to it to decrease its position in the mold so that the precursor of the elastic surface layer rises along the inner side wall of the mold and the gap around the profile of the hard core layer and at least the grooves on the side surface of the penetrates hard core layer, so that the thickness of the precursor of the elastic surface layer is reduced from 2 cm to about 0.5 cm.
4. d. The pressure exerted in step c is maintained and the pressure is maintained for 20-25 minutes so that the precursor of the elastic surface layer is hardened in the mold to obtain the two-layer laminate floor.

According to the present exemplary embodiment, it is provided that the hard core layer is a hard-foamed, coextrusion-coated reinforcement plate.

The apparatus used for manufacturing the rigid foamed co-extrusion coated reinforcement sheet includes a main extruder, an auxiliary extruder, a co-extrusion die, and a molding die.

As in 2-3 As shown, the co-extrusion die is formed by docking a plurality of die plates including a die feed plate, a flow channel forming plate, and a die outlet plate.

The co-extrusion form is with a main flow channel 10 , a reinforcement channel 20th and a co-extrusion flow channel 30th Mistake. The main flow channel 10 , the reinforcement material channel 20th and the co-extrusion flow channel 30th are independent of each other in form. The reinforcement material channel 20th includes a first channel 21 and a second channel 22nd that are on either side of the main flow channel 10 are distributed. The first channel 21 and the second channel 22nd form a first outlet 211 and a second outlet 221 that are on either side of the main flow duct outlet 11 are arranged on the mold outlet plate. The coextrusion flow channel 30th forms a surface outlet 31 on the mold outlet plate. The surface outlet 31 is a rectangular ring structure and is around the main flow channel outlet 11 arranged. The first outlet 211 and the second outlet 221 are between the main flow duct outlet 11 and the surface outlet 31 arranged.

A structure corresponding to the shape of the unit element is on the surface outlet 31 arranged.

The reinforcement material channel 20th includes an entrance section 201 and an exit section 202 . The entrance section 201 and the exit section 202 are connected. The included angle between the entrance section 201 and the main flow channel 10 gradually decreases to zero along the material feed direction. The feed opening of the reinforcing material of the entrance section 201 is arranged on the flow channel formation plate.

The coextrusion flow channel 30th comprises an interconnected feed section 301 , a casting section 302 and a mold section 303 . The main body portion of the feed portion 301 is disposed on the formation plate of the second flow channel of the coextrusion mold, and the main body of the molding section 302 is arranged on the formation plate of the first flow channel of the mold, and the mold portion 303 is located on the outlet plate of the mold. The feed section 301 forms two branch channels 3011 on the formation plate of the second flow channel. The pouring section 302 is two interconnected inclined channels 3021 formed in the formation plate of the first flow channel. The branching channel 3011 is with the sloped channel 3021 docked. The inclined canal 3021 is with the mold section 303 docked. The inner end surface of the mold outlet plate is docked with the outer end surface of the formation plate of the first flow channel. The inner end face of the formation plate of the first flow channel is docked with the outer end surface of the formation plate of the second flow channel. The rectangular annular structure of the cross section of the mold section 303 gradually shrinks along the outlet direction and forms the surface outlet 31 on the outer end face of the mold outlet plate.

The entire coextrusion mold consists of a combination of a mold feed plate, a plurality of flow channel forming plates and a mold outlet plate. The mold feed plate and the mold outlet plate are arranged at both ends of the mold, respectively, and a plurality of flow channel formation plates are arranged between the mold feed plate and the mold outlet plate. According to the method of using the co-extrusion die, the die plate into which the material enters at one end is a die feed plate, and the die plate at one end of the product extrusion is a die outlet plate. The order of a plurality of flow channel plates, the first in the vicinity of the mold outlet plate as the formation plate of the first flow channel, the second in the vicinity of the mold outlet plate as the formation plate of the second flow channel, and so on. The inner end surface of the mold outlet plate refers to a surface of the mold outlet plate that faces the formation plate of the first flow channel. The outer end surface of the formation plate of the first flow channel refers to a surface of the formation plate of the first flow channel in the direction of the mold outlet plate. The inner end surface of the formation plate of the first flow channel refers to a surface of the formation plate of the first flow channel in the direction of the formation plate of the second flow channel. The outer end surface of the formation plate of the second flow channel refers to a surface of the formation plate of the second flow channel in the direction of the formation plate of the first flow channel.

• Nachdem das erste Rohmaterial, das das erste Harz und das Schäumungsmittel enthält, vollständig gemischt wurde (PVC-Harz 100 kg, Calciumcarbonat 50 kg, Stearinsäure 0,5 kg, Magnesiumstearat 0,5 kg, Calcium- und Zinkstabilisator 5 kg, AC-Schäumungsmittel 1 kg, Zinkoxid 0,5 kg, 15 Minuten in einem Hochgeschwindigkeitsmischer gemischt, Mischtemperatur 120 °C, danach in einem Kaltmischer auf 30 °C abgekühlt), wird es in den Hauptextruder eingegeben, und das erste Rohmaterial wird durch den Hauptextruder in den Hauptströmungskanal 10 der Form gequetscht und dann aus dem Hauptströmungskanal 10 extrudiert, um einen Druckhaltekern zu bilden.

The method of manufacturing the above hard core layer 2 is as follows:

• After the first raw material containing the first resin and the foaming agent are completely mixed (PVC resin 100 kg, calcium carbonate 50 kg, stearic acid 0.5 kg, magnesium stearate 0.5 kg, calcium and zinc stabilizer 5 kg, AC foaming agent 1 kg, zinc oxide 0.5 kg, mixed in a high-speed mixer for 15 minutes, mixing temperature 120 ° C, then cooled to 30 ° C in a cold mixer), it is fed into the main extruder, and the first raw material is fed into the main flow channel through the main extruder 10 squeezed out of the mold and then out of the main flow channel 10 extruded to form a pressure holding core.

At the same time, two layers of glass fiber reinforcement are being removed from the first duct 21 or the second channel 22nd entered.

At the same time, the second raw material (PVC resin 100 kg, hollow glass balls 20 kg, calcium carbonate 50 kg, magnesium stearate 2.0 kg) containing the second resin and containing no foaming agent is completely mixed and passed through the auxiliary extruder from the coextrusion flow channel 30th fed to the co-extrusion die and from the surface outlet 31 extruded to obtain a frame-shaped co-extrusion housing.

The pressure holding core, the fiberglass reinforcement layer and the coextrusion housing are extruded from their respective flow channels to form a preform. At the same time, the mold blank is inserted into the mold and the pressure holding core is foamed in the mold in a coextrusion housing which is restricted by the inner wall of the mold. The co-extrusion case is filled and the preform is assembled and molded in the mold to form the hard core layer. The shaped blank is successively a pressure holding core, a glass fiber reinforcement layer and a coextrusion housing from the inside to the outside. There is a pre-formed foaming space between the pressure holding core and the coextrusion housing.

The above technical solution provides a method for making a glass fiber reinforcement layer within a hard core layer. This is more difficult for the skilled person. Since the general understanding is that in order to fuse the glass fiber reinforcing layer with the foamed core body, the reinforcing material channel is connected to the main flow channel so that the glass fiber reinforcing layer can be integrated into the foamed layer. The problem with this is that there is a lot of pressure inside the main flow channel. Once the reinforcement material channel is connected to the main flow channel, the pressure is reversely released along the reinforcement material channel, and the material in the main flow channel will of course be squeezed into the reinforcement material channel and even further foamed, thereby blocking the reinforcement material channel, making it difficult for the fiberglass reinforcement layer to enter further and the To interrupt production. In general, it is necessary to dismantle the mold and clean the reinforcement material channel in a short production cycle. In addition, the hard core layer, which is hardly produced, is foamed in advance due to the premature depressurization, and some areas are foamed in advance, which also makes it difficult to control the quality of the hard core layer.

In the above technical solution, the above problems are solved by changing the manufacturing method and modifying the shape. Mainly manifested in the following areas: On the form: 1. The main flow channel adopts the pressure holding design throughout the form; 2. A co-extrusion flow channel is added; 3. The reinforcement material channel, the coextrusion flow channel and the main flow channel are independent of each other and meet at the port of the mold outlet plate; 4. The mold is installed at the mold exit. Regarding the process: 1. The idea of forming a composite panel from the mold exit is abandoned; 2. The co-extrusion case is inserted so that if the material converges in the mold outlet portion even though the compounding is not realized, the automatic blank required for the compounding is realized and then enters the mold for compounding. The first half of the mold realizes the compounding of the plate and the second half realizes the shaping of the plate.

Embodiment 2

Unlike in Embodiment 1, the hard core layer comprises a rigid PVC foam core, a PVC skin layer coated with the rigid PVC foam core, and a coextrusion housing coated with the PVC skin layer. That is, the glass fiber reinforcement layer is not included, the thickness of the PVC skin layer is about 0.5mm, and the thickness of the co-extrusion case is about 2mm.

• Nachdem das PVC-Schaummaterial vollständig gemischt wurde (PVC-Harz 100 kg, Calciumcarbonat 50 kg, Stearinsäure 0,5 kg, Magnesiumstearat 0,5 kg, Calcium- und Zinkstabilisator 5 kg, AC-Schäumungsmittel 1 kg, Zinkoxid 0,5 kg, 15 Minuten in einem Hochgeschwindigkeitsmischer gemischt, Mischtemperatur 120 °C, danach in einem Kaltmischer auf 30 °C abgekühlt), wird es durch den Hauptextruder aus der Düse extrudiert.

The procedure for making the hard core layer is as follows:

• After the PVC foam material has been completely mixed (PVC resin 100 kg, calcium carbonate 50 kg, stearic acid 0.5 kg, magnesium stearate 0.5 kg, calcium and zinc stabilizer 5 kg, AC foaming agent 1 kg, zinc oxide 0.5 kg, Mixed for 15 minutes in a high-speed mixer, mixing temperature 120 ° C, then cooled in a cold mixer to 30 ° C), it is extruded through the main extruder from the nozzle.

At the same time, the second raw material (PVC resin 100 kg, hollow glass spheres 20 kg, calcium carbonate 50 kg, magnesium stearate 2.0 kg) containing the second resin and containing no foaming agent is completely mixed and passed through the auxiliary extruder from the coextrusion flow channel of the coextrusion mold fed and extruded from the surface outlet to obtain a frame-shaped co-extrusion housing.

The pressure holding core and the coextrusion housing are extruded from their respective flow channels to form a preform. At the same time, the mold blank is inserted into the mold and the pressure holding core is foamed in the mold in a coextrusion housing which is restricted by the inner wall of the mold. The co-extrusion case is filled and the preform is assembled and molded in the mold to form the hard core layer. There is a pre-formed foaming space between the pressure holding core and the coextrusion housing.

Compared with Embodiment 1, the coextrusion mold in the present embodiment lacks a reinforcing material channel portion and the rest are the same.

Embodiment 3

The difference from the exemplary embodiment is that the hard core layer is a preformed aluminum alloy profile. The manufacturing method is the same as in Embodiment 1.

Embodiment 4

Unlike in exemplary embodiment 1, the hard core layer is a hot-extruded solid panel made of wood-plastic. The wood-plastic solid sheet hot extruded refers to a solid sheet made by mixing a resin raw material, a vegetable fiber powder and a processing aid by a conventional hot extrusion method.

The top and side surfaces of the plate also form surface A and have all the properties of surface A above. Commonly used plastics in this plate are polyolefins. In this In the exemplary embodiment, a resin is used as a mixture of polyethylene and polypropylene, with polyethylene being 38 kg, polypropylene being 2 kg and vegetable fiber powder being 100 kg.

The manufacturing method is the same as in Embodiment 1.

Embodiment 5

In contrast to Example 1, the hard core layer is a hot-extruded hollow board made of wood-plastic. The hot extruded wood-plastic hollow sheet is the same as the raw materials used in the hot-extruded solid wood-plastic sheet, but the processing shapes are different. Since the mold has a mandrel protruding from the mold opening, the plate forms a hollow structure at the corresponding position of the mandrel. Similarly, the top and side surfaces of the hot extruded hollow wood-plastic sheet form surface A and have all the properties of surface A above.

The manufacturing method is the same as in Embodiment 1.

Comparative example 1

A PU plate that is manufactured in accordance with the in W02018154287A1 disclosed method for a low heat absorbing flame retardant polyurethane wood imitation material.

The products in Embodiment 1, Embodiment 2 and the products in Comparative Example 1 were made according to the relevant contents of FIG GB / T24508-2009 , GB / T24137-209 , GB / T2411-2008 , GB / T18102-2007 tested to determine bending load, bending strength, surface hardness and surface wear resistance and the results are shown in the following table. Test object Test requirements Basis of the test procedure Test results Embodiment 1 Embodiment 2 Comparative example 1 Three-point bending properties (300 mm span) Bending load (N) 23 ° C ≥2500 GB / T24508-2009 4304 3657 3338 80 ° C - 3117 2615 2037 Flexural strength (MPa) 23 ° C ≥22 GB / T24137-209 28.04 23.8 9.28 80 ° C - 18.2 15.4 5.1 Surface hardness (HD) 30-60 GB / T2411-2008 32 32 30th Surface wear resistance (100 rpm wear value, g) ≤ 0.13, and the layer is not worn or damaged GB / T18102-2007 0.06, the layer does not wear out 0.06, the layer does not wear out 0.197, the layer slightly worn

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2018/154287 A1 [0003]
• WO 2018154287 A1 [0061]
• GB T245082009 [0062]
• GB T24137209 [0062]
• GB T24112008 [0062]
• GB T181022007 [0062]

Claims (6)

Two-layer laminate flooring, comprising a hard core layer (2) and an elastic surface layer (1) which envelops the hard core layer (2), characterized in that an adaptation structure is arranged between the elastic surface layer (1) and the hard core layer (2), wherein the matching structure includes a plurality of unit elements formed on a surface of the hard core layer and a plurality of correspondence elements formed on a surface of the surface elastic layer, the unit element being a stripe structure having a convex shape or a groove shape in cross section arranged along the longitudinal direction of the floor, the correspondence element being a convex fitting component having a groove shape in cross section covering the convex portion when the cross section of the unit element has a convex shape, the correspondence element being a groove fitting component ent with a convex shape in cross section, which is embedded in the groove when the cross section of the unit member has a groove shape, the material of the elastic surface layer is selected from one or more of natural rubber, synthetic rubber or thermoplastic elastomer, the hard core layer is selected from a metal profile, a hot extruded solid wood-plastic sheet, a hot-extruded hollow wood-plastic sheet, a hard-foamed self-skinning sheet, a hard-foamed co-extrusion-coated sheet and a hard-foamed co-extrusion-coated reinforcement sheet. Two-layer laminate floor after Claim 1 , characterized in that the adaptation structure also comprises a plurality of first connection units and a plurality of second connection units, the first connection unit being formed by a surface on which the hard core layer is in contact with the elastic surface layer and is arranged between two adjacent unit elements wherein the second connection unit is formed by a surface on which the elastic surface layer is in contact with the hard core layer and is arranged between two adjacent correspondence elements, the first connection unit and the second connection unit being appropriately arranged. Two-layer laminate floor after Claim 1 characterized in that the convex matching component having a groove shape in cross section has a shrink structure when the cross section of the unit element has a convex shape, the unit element having a convex shape in cross section has a shrink structure when the cross section of the unit element has a groove shape. Two-layer laminate floor after Claim 1 , characterized in that a surface in which the hard core layer is in contact with the elastic surface layer, and a surface in which the elastic surface layer is in contact with the hard core layer, with the unit element and the correspondence element at the junction of the horizontal and vertical direction of the floor is provided. Two-layer laminate floor after Claim 2 , characterized in that the surface of the first connection unit and the second connection unit is a serrated surface in cross section, flat or sawtooth-shaped. Two-layer laminate floor after Claim 1 , characterized in that the hard foamed coextrusion coated reinforcement plate consists of a hard foamed core, a glass fiber reinforcement layer and a coextrusion housing, wherein the glass fiber reinforcement layer is arranged between the hard foamed core and the coextrusion housing, wherein the hard foamed core and the self-skinning layer are formed by a first raw material that a first resin and a foaming agent, the coextrusion case being formed by a second raw material containing a second resin and not containing a foaming agent, the glass fiber reinforcing layer being formed by hardening the glass fiber mesh after impregnating with resin.

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