CN110629592B - Double-corrugated regenerated leather structure and preparation method and application thereof - Google Patents

Double-corrugated regenerated leather structure and preparation method and application thereof Download PDF

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CN110629592B
CN110629592B CN201910905811.9A CN201910905811A CN110629592B CN 110629592 B CN110629592 B CN 110629592B CN 201910905811 A CN201910905811 A CN 201910905811A CN 110629592 B CN110629592 B CN 110629592B
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corrugated
regenerated
leather
reclaimed
double
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CN110629592A (en
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陈诗杰
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/003—Attaching together sheets, strips or webs; Reinforcing edges by stitching
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B32B9/025—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch comprising leather
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/008—Sewing, stitching
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • 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
    • B32B2479/00—Furniture

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The invention relates to a double-corrugated regenerated leather structure and a preparation method and application thereof, wherein the double-corrugated regenerated leather structure comprises two corrugated sheets, the two corrugated sheets have the same size, the cross sections of the two corrugated sheets are sine waveforms with the same amplitude and cycle respectively, the two corrugated sheets are arranged symmetrically from top to bottom, and the wave trough of the corrugated sheet positioned at the upper part and the wave crest of the corrugated sheet positioned at the lower part are sewn and fixed; the corrugated sheet comprises N pieces of corrugated reclaimed leather, the N pieces of corrugated reclaimed leather are formed by pressing N pieces of reclaimed leather which are soaked and then overlapped, and the front faces of the reclaimed leather face to face the same direction through a corrugated die, and the thickness of the corrugated sheet is smaller than the sum of the thicknesses of the N pieces of reclaimed leather; in the corrugated sheet, adjacent corrugated regenerated skins are fixed by gluing. The application double-corrugated regenerated leather structure has certain strength while having the advantages of regenerated leather, and can be applied to furniture such as tables, chairs and stools as a brand-new material.

Description

Double-corrugated regenerated leather structure and preparation method and application thereof
Technical Field
The invention belongs to the technical field of regenerated leather, and particularly relates to a double-corrugated regenerated leather structure and a preparation method and application thereof.
Background
The regenerated leather is called leather-bran paper. The scrap leather and the leftover bits and pieces produced in the leather processing process are recycled and processed into products with high added value. In the current market, the reclaimed leather has two main application modes:
one is used as an interlayer for other materials. Such as parts of shoes, textile and accessory linings, briefcases, handbags, sofas, and the like. Although the price of the reclaimed leather is more expensive than that of the paperboard and the production cost is slightly increased, the added value is improved due to good product quality, so the production profit is increased. And the regenerated leather has unequally texture, good elasticity and toughness, certain moisture resistance, strong processing adaptability and the like, so that the regenerated leather gradually replaces paper boards in the furniture industry.
The second is the use as a facing material. The regenerated leather can present rich expression forms after processes of embossing, printing, PU compounding and the like, so that the regenerated leather is widely applied to occasions such as book covers, electronic product shells, leather bags and the like.
Therefore, the regenerated leather in the prior art is used together with other materials, and because the regenerated leather belongs to soft materials, the strength of the regenerated leather is not utilized in the prior art, and the regenerated leather is used as a precedent of a load-bearing structure independently. Therefore, how to reform the regenerated leather into a material with bearing capacity becomes a novel furniture material except materials such as wood, metal, paper and the like, is applied to furniture such as tables, chairs, stools and the like in life, and is a blank field which needs to be filled in the prior art urgently.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide a double-corrugated regenerated leather structure with certain strength and hardness, and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-corrugated regenerated leather structure comprises two corrugated sheets, wherein the two corrugated sheets are the same in size, the cross sections of the two corrugated sheets are sine waveforms with the same amplitude and the same period, the two corrugated sheets are arranged symmetrically up and down, and the wave trough of the corrugated sheet positioned at the upper part and the wave crest of the corrugated sheet positioned at the lower part are sewn and fixed;
the corrugated sheet comprises N pieces of corrugated reclaimed leather, the N pieces of corrugated reclaimed leather are formed by pressing N pieces of reclaimed leather which are soaked and then overlapped, and the front faces of the reclaimed leather face to face the same direction through a corrugated die, and the thickness of the corrugated sheet is smaller than the sum of the thicknesses of the N pieces of reclaimed leather;
in the corrugated sheet, adjacent corrugated regenerated skins are fixed by gluing.
Furthermore, an anti-rebound layer is arranged between the two corrugated sheets.
Further, N is a natural number which is more than or equal to 3, and the ratio of the height difference between the wave crest and the wave trough of the corrugated sheet to the thickness of the corrugated sheet is 5-8: 1.
Further, still include surface layer flute regeneration skin, surface layer flute regeneration skin is fixed in the upper surface of upper portion flute piece and/or the lower surface of lower part flute piece through sticky mode, just surface layer flute regeneration skin is rather than the surface laminating of the flute piece that bonds mutually.
A preparation method of a double-corrugated regenerated leather structure comprises the following steps:
1) and cutting: cutting N regenerated leathers with the same size and larger area than the corrugated mould;
2) and skin soaking: placing the N regenerated skins in water, soaking for 20-40 minutes, slowly taking out, and draining;
3) and first pressing die: flatly spreading N regenerated skins on a female die of a corrugated die, pressing a male die, and pressing under the pressure of 8-12 tons;
4) and first drying: opening a corrugated mold, taking out the N regenerated leathers, placing the N regenerated leathers on a corrugated drying mold, naturally airing the N regenerated leathers for 20-30 minutes under the conditions of sunlight insolation prevention and ventilation, and then integrally turning over the N regenerated leathers and airing the N regenerated leathers for 20-30 minutes, thus repeatedly operating for 3-4 times;
5) every two adjacent regenerated leathers in the N regenerated leathers are fixed by gluing;
6) and pressing for the second time: placing the N regenerated leathers into a corrugating die again, and pressing under the pressure of 8-12 tons;
7) and drying for the second time: opening a corrugated mold, taking out the N regenerated skins, placing the N regenerated skins on a corrugated drying mold, naturally airing for 20-30 minutes under the conditions of sunlight exposure prevention and ventilation, turning over the N regenerated skins and airing for 20-30 minutes, and repeating the steps until the N regenerated skins are dried to obtain corrugated sheets;
8) and butt-joint: 2 corrugated sheets with the same size and specification are selected and sewn into a double-corrugated regenerated leather structure.
Further, before the skin soaking, the edge of the N pieces of regenerated skin is fixed by gluing or clamping.
Further, after the second drying, the corrugated sheet is cut neatly along the edge of the die by a cutter.
Further, the corrugated mold comprises a female mold and a male mold which are matched with each other, and when the corrugated mold is subjected to primary pressing and secondary pressing, the distance between the female mold and the male mold is 0.7-0.8 times of the addition value of the thicknesses of the N regenerated skins.
Further, after the butt-joint, the outer surfaces of one or two corrugated sheets after the butt-joint are glued with a surface layer corrugated regenerated leather.
The invention also relates to application of the double-corrugated recycled leather structure as a load-bearing structure or an auxiliary stress structure in furniture.
Compared with the prior art, the invention has the beneficial effects that: the double-corrugated regenerated leather structure provided by the invention is used as a brand new material, compared with the regenerated leather in the prior art, the hardness is greatly increased, and the double-corrugated regenerated leather structure can be used as a bearing material and applied to the field of furniture.
Drawings
Fig. 1 is a schematic structural diagram of a double-corrugated regenerated leather structure according to an embodiment of the present invention;
fig. 2 is a partially disassembled schematic structural view of a double-corrugated recycled leather structure according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a corrugating mold according to an embodiment of the present invention.
In the figure: 1-corrugated sheet, 2-rebound-prevention layer, 3-female die, 4-male die, 5-positioning column, 6-positioning hole, 7-surface corrugated regenerated leather and 8-suture line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present embodiment relates to a double-corrugated recycled leather structure, which includes two corrugated sheets 1, where the two corrugated sheets 1 have the same size, and have cross sections with sine waveforms having the same amplitude and period, respectively, the two corrugated sheets 1 are arranged symmetrically up and down, and a wave trough of the upper corrugated sheet 1 and a wave crest of the lower corrugated sheet 1 are sewn and fixed;
the corrugated sheet 1 comprises N pieces of corrugated reclaimed leather, the N pieces of corrugated reclaimed leather are formed by pressing N pieces of reclaimed leather which are soaked and then are placed in an overlapping mode, the front faces of the N pieces of reclaimed leather face to the same direction through a corrugated die, and the thickness of the corrugated sheet 1 is smaller than the sum of the thicknesses of the N pieces of reclaimed leather;
in the corrugated sheet 1, adjacent corrugated regenerated leathers are fixed by gluing.
In the embodiment, the corrugated sheet 1 is formed by pressing a plurality of regenerated leathers by a corrugated die, so that the compactness is increased, the hardness is increased, and the corrugated sheet can be used as a bearing structure; and when in use, the customized hard fillers such as wooden sticks or acrylic sticks with matched sizes can be inserted into the closed structure limited by the wave crests and the wave troughs of the two corrugated sheets so as to increase the strength of the double-corrugated regenerated leather structure and prevent the rebound deformation of the double-corrugated regenerated leather structure.
In addition, preferably, in an embodiment of the present invention, an anti-rebound layer 2 is further disposed between the two corrugated sheets 1. The anti-rebound layer 2 is sewn between the upper corrugated sheet 1 and the lower corrugated sheet 1, so that the corrugated sheets 1 can be prevented from being rebounded and deformed. Preferably, the anti-rebound layer 2 is a regenerated leather which is not subjected to compression molding.
In addition, preferably, in an embodiment of the present invention, N is a natural number greater than or equal to 3, and a ratio of a height difference between a peak and a trough of the corrugated sheet 1 to a thickness of the corrugated sheet 1 is 5-8: 1. Preferably, the thickness of the corrugated sheet 1 is 2.6mm to 10 mm.
The thickness specifications of the regenerated leather in the prior art are 0.4mm, 0.6mm, 0.8mm and 1mm, and when the corrugated sheet 1 is pressed, N pieces of regenerated leather are arranged according to the principle that the regenerated leather is thin inside and thick outside.
In addition, preferably, in an embodiment of the present invention, the corrugated surface reclaimed leather 7 is further included, the corrugated surface reclaimed leather 7 is fixed to the upper surface of the upper corrugated sheet 1 and/or the lower surface of the lower corrugated sheet 1 by gluing, and the corrugated surface reclaimed leather 7 is attached to the outer surface of the corrugated sheet 1 adhered thereto.
In the embodiment, the surface layer corrugated regenerated leather 7 is adhered to one side or two sides of the two sewed corrugated sheets 1, so that the sewing thread 8 of the two corrugated sheets 1 can be hidden, and the double-corrugated regenerated leather structure is more attractive.
The invention also relates to a preparation method of the double-corrugated regenerated leather structure, which specifically comprises the following steps:
1) and cutting: cutting N regenerated leathers with the same size and larger area than the corrugated mould;
2) and skin soaking: placing the N regenerated skins in water, soaking for 20-40 minutes, slowly taking out, and draining;
3) and first pressing die: flatly spreading N regenerated skins on a female die 3 of a corrugated die, pressing a male die 4, and pressing under the pressure of 8-12 tons;
4) and first drying: opening a corrugated mold, taking out the N regenerated leathers, placing the N regenerated leathers on a corrugated drying mold, naturally airing the N regenerated leathers for 20-30 minutes under the conditions of sunlight insolation prevention and ventilation, and then integrally turning over the N regenerated leathers and airing the N regenerated leathers for 20-30 minutes, thus repeatedly operating for 3-4 times;
5) every two adjacent regenerated leathers in the N regenerated leathers are fixed by gluing;
6) and pressing for the second time: placing the N regenerated leathers into a corrugating die again, and pressing under the pressure of 8-12 tons;
7) and drying for the second time: opening a corrugated mold, taking out the N regenerated skins, placing the N regenerated skins on a corrugated drying mold, naturally airing for 20-30 minutes under the conditions of sunlight exposure prevention and ventilation, turning over the N regenerated skins and airing for 20-30 minutes, and repeating the steps until the N regenerated skins are dried to obtain corrugated sheets 1;
8) and butt-joint: 2 corrugated sheets 1 with the same size and specification are selected and sewn into a double-corrugated regenerated leather structure.
Wherein, the reclaimed leather used in the embodiment is the prior art and can be directly purchased; the upper surface of the corrugated drying die is of a corrugated structure which is attached to the corrugated sheet 1, and the corrugated regenerated leather is dried by the corrugated drying die, so that the corrugated regenerated leather can be effectively prevented from rebounding and deforming; the application can greatly reduce the rebound deformation rate of the regenerated leather after demoulding by pressing and drying twice.
The invention processes the soft material regenerated leather in the prior art into the bearing material with certain mechanical strength, becomes a novel furniture material except materials such as wood, metal, paper and the like, can be applied to furniture such as tables, chairs, stools and the like in life, and develops a new era of the regenerated leather in the field of furniture.
In addition, preferably, in an embodiment of the present invention, in order to prevent the N recycled skins from being dislocated after being soaked, the N recycled skins are conveniently placed on the female mold 3 of the corrugating mold at one time, and before being soaked, the method further includes fixing the edges of the N recycled skins by gluing or clamping; and when the rubber is used for fixing, cutting off the glued part at the edge of the N pieces of regenerated leather after the first compression molding.
In addition, in an embodiment of the present invention, after the second drying, the method further includes cutting the corrugated sheet 1 along the edge of the mold by using a cutter.
In addition, preferably, referring to fig. 3, in an embodiment of the present invention, the corrugating mold includes a female mold 3 and a male mold 4 which are mated with each other, and the female mold 3 and the male mold 4 are spaced from each other by 0.7 to 0.8 times the sum of the thicknesses of the N regenerated skins at the time of the first press molding and the second press molding.
In addition, preferably, referring to fig. 3, in an embodiment of the present invention, positioning pillars 5 are disposed around the female mold 3, and positioning holes 6 corresponding to the positioning pillars 5 are disposed on the male mold 4; and punching a regenerated leather positioning hole at the position of the N regenerated leathers corresponding to the positioning column 5 after the N regenerated leathers are subjected to primary die pressing and before primary drying. So when carrying out the second moulding-die, alright with N regeneration skin through regeneration skin locating hole insert the reference column 5 in, take place the problem of dislocation when avoiding the second moulding-die. Preferably, in order to solve the problem of rebound deformation during the drying of the regenerated leather, the corrugated drying die is the same as the female die in shape and size, and a positioning column is arranged at the same position.
In addition, preferably, in an embodiment of the present invention, a heating rod is further disposed in the corrugating mold. The arrangement of the heating rod can greatly reduce the die pressing time, and tests show that at room temperature, the first die pressing needs more than 40 hours, and the second die pressing needs more than 30 minutes to reduce the rebound rate; when the press molding is carried out at 120-130 ℃, the first press molding only needs 5-15 minutes, and the second press molding only needs about 30-100 seconds.
Preferably, when the first pressing and the second pressing are both performed at room temperature, the adjacent regenerated leather in the corrugated sheet 1 is fixed by using leather-used environment-friendly water-based glue; when first moulding-die and second moulding-die all go on under the heating condition, adopt hot melt film adhesive fixation between the adjacent regeneration skin in the flute piece 1, and the hot melt film glues the face that can contact each other between the regeneration skin respectively before the bubble skin to realize the mutual bonding of adjacent regeneration skin again after the primary drying. Further, it is more preferable that the hot-melt adhesive sheet is adhered to the hides at intervals in order to avoid an influence of the hot-melt adhesive sheet on the soaking effect of the hides.
In the embodiment, the hot-melt adhesive sheet is adhered to the reclaimed leather in advance before the leather is soaked, so that the reclaimed leather is more firmly adhered with the hot-melt adhesive; and the adjacent regenerated skins in the corrugated sheet 1 are bonded after the first drying, so that the skins can be prevented from appearing marks like growth lines when the skins are pressed for the first time.
In addition, in an embodiment of the present invention, preferably, after the corrugated sheets 1 are butt-seamed, a surface-layer corrugated reclaimed leather 7 is glued to the outer surface of one or two corrugated sheets 1 after the butt-seamed. The arrangement of the surface layer corrugated regenerated leather 7 can prevent the suture line 8 from exposing to influence the beauty of the whole double-corrugated regenerated leather structure. The surface layer corrugated regenerated leather 7 can be placed under the N pieces of regenerated leather and pressed together when the corrugated sheet 1 is pressed.
In addition, the invention also relates to application of the double-corrugated recycled leather structure as a load-bearing structure or an auxiliary stress structure in furniture. For example, the double-corrugated reclaimed leather structure is applied to tables, chairs and stools as a load-bearing structure.
The double-corrugated recycled leather structure is used as a new structural material, has the advantages of being capable of being stored in a curling mode, convenient to transport, capable of reducing the transport space and cost, and convenient to carry outdoors.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims (10)

1. The double-corrugated reclaimed leather is characterized by comprising two corrugated sheets, wherein the two corrugated sheets have the same size, the cross sections of the two corrugated sheets are sine waves with the same amplitude and the same period, the two corrugated sheets are arranged symmetrically up and down, and the wave trough of the corrugated sheet positioned at the upper part is sewn and fixed with the wave crest of the corrugated sheet positioned at the lower part;
the corrugated sheet comprises N pieces of corrugated reclaimed leather, the N pieces of corrugated reclaimed leather are formed by pressing N pieces of reclaimed leather which are soaked and then overlapped, and the front faces of the reclaimed leather face to face the same direction through a corrugated die, and the thickness of the corrugated sheet is smaller than the sum of the thicknesses of the N pieces of reclaimed leather;
in the corrugated sheet, adjacent corrugated regenerated skins are fixed by gluing.
2. The double-corrugated reclaimed leather according to claim 1, wherein an anti-rebound layer is further arranged between the two corrugated sheets.
3. The double-corrugated reclaimed leather according to claim 1, wherein N is a natural number of 3 or more, and the ratio of the height difference between the crests and the troughs of the corrugated sheet to the thickness of the corrugated sheet is 5-8: 1.
4. The double-corrugated reclaimed leather according to any one of claims 1 to 3, further comprising a surface-corrugated reclaimed leather, wherein the surface-corrugated reclaimed leather is fixed to the upper surface of the upper corrugated sheet and/or the lower surface of the lower corrugated sheet by gluing, and the surface-corrugated reclaimed leather is attached to the outer surface of the corrugated sheet adhered thereto.
5. The method for preparing double-corrugated reclaimed leather according to any one of claims 1 to 4, which comprises the following steps:
1) and cutting: cutting N regenerated leathers with the same size and larger area than the corrugated mould;
2) and skin soaking: placing the N regenerated skins in water, soaking for 20-40 minutes, slowly taking out, and draining;
3) and first pressing die: flatly spreading N regenerated skins on a female die of a corrugated die, pressing a male die, and pressing under the pressure of 8-12 tons;
4) and first drying: opening a corrugated mold, taking out the N regenerated leathers, placing the N regenerated leathers on a corrugated drying mold, naturally airing the N regenerated leathers for 20-30 minutes under the conditions of sunlight insolation prevention and ventilation, and then integrally turning over the N regenerated leathers and airing the N regenerated leathers for 20-30 minutes, thus repeatedly operating for 3-4 times;
5) every two adjacent regenerated leathers in the N regenerated leathers are fixed by gluing;
6) and pressing for the second time: placing the N regenerated leathers into a corrugating die again, and pressing under the pressure of 8-12 tons;
7) and drying for the second time: opening a corrugated mold, taking out the N regenerated skins, placing the N regenerated skins on a corrugated drying mold, naturally airing for 20-30 minutes under the conditions of sunlight exposure prevention and ventilation, turning over the N regenerated skins and airing for 20-30 minutes, and repeating the steps until the N regenerated skins are dried to obtain corrugated sheets;
8) and butt-joint: 2 corrugated sheets with the same size and specification are selected and sewn into the double-corrugated regenerated leather.
6. The method for preparing double-corrugated reclaimed leather according to claim 5, wherein before the foaming, the method further comprises the steps of fixing the edges of the N reclaimed leathers by gluing or clamping; and when the rubber is used for fixing, cutting off the glued part at the edge of the N pieces of regenerated leather after the first compression molding.
7. The method for preparing double-corrugated reclaimed leather according to claim 5, wherein after the second drying, the method further comprises cutting the corrugated sheets to be tidy along the edges of the die by using a cutter.
8. The method for preparing a double-corrugated reclaimed leather according to claim 5, wherein the corrugating mold comprises a female mold and a male mold which are matched with each other, and the distance between the female mold and the male mold is 0.7-0.8 times of the sum of the thicknesses of the N reclaimed leathers during the first pressing and the second pressing.
9. The method for preparing double-corrugated reclaimed leather according to claim 5, wherein after the butt-jointing, a surface-layer corrugated reclaimed leather is adhered to the outer surface of the one or two corrugated sheets after the butt-jointing.
10. Use of the double-corrugated reclaimed leather according to any one of claims 1 to 4 as a load-bearing structure or auxiliary load-bearing structure in furniture.
CN201910905811.9A 2019-09-24 2019-09-24 Double-corrugated regenerated leather structure and preparation method and application thereof Expired - Fee Related CN110629592B (en)

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