阅读说明：本技术 一种汽车内饰用皮革及其加工工艺 (Leather for automobile interior decoration and processing technology thereof ) 是由 付红萍 于 2020-06-02 设计创作，主要内容包括：本发明公开了一种汽车内饰用皮革及其加工工艺,旨在提供一种吸水效果好,延展性强,结构简单以及实用强的汽车内饰用皮革,其技术方案要点是将作为发泡层的原材料设置为,PVC树脂为RH-1型PVC树脂；弹性改性剂为丁腈橡胶；发泡剂为偶氮二甲酰胺；填料为碳酸钙；增塑剂；热稳定剂组成,同时通过增加了聚苯醚酮和纳米氧化铝,由于纳米氧化铝的纳米效应和多孔结构的特性,将聚苯醚酮和纳米氧化铝在高温环境中进行混料,使聚苯醚酮和纳米氧化铝相互吸附渗透,相互分散的更加均匀,相互协同,均匀了彼此的尺寸稳定性和强度韧性,本发明适用于汽车内饰皮革材料技术领域。(The invention discloses a leather for automobile interior decoration and a processing technology thereof, aiming at providing a leather for automobile interior decoration with good water absorption effect, strong ductility, simple structure and strong practicability, and the technical scheme is characterized in that the raw material used as a foaming layer is set as RH-1 type PVC resin; the elastic modifier is nitrile rubber; the foaming agent is azodicarbonamide; the filler is calcium carbonate; a plasticizer; the invention relates to a heat stabilizer composition, which is prepared by adding polyphenylene ether ketone and nano-alumina, mixing the polyphenylene ether ketone and the nano-alumina in a high-temperature environment due to the nano effect and the characteristic of a porous structure of the nano-alumina, so that the polyphenylene ether ketone and the nano-alumina are adsorbed and permeated with each other, are dispersed more uniformly and cooperate with each other, and have uniform dimensional stability and strength toughness.)

1. The leather for the automotive interior comprises a base layer (1), a foaming layer (2), a water absorbing layer (3) and a surface modification layer (4), wherein the base layer, the foaming layer (2), the water absorbing layer and the surface modification layer are sequentially connected from inside to outside, and is characterized in that the foaming layer (2) is prepared from the following raw materials in parts by weight: 100 parts by mass of PVC resin; 75-85 parts of a plasticizer; 30-40 parts of polyphenylene ether ketone; 5-10 parts of nano aluminum oxide; 10-15 parts of color paste; 5-10 parts of an elastic modifier; 1-3 parts of a heat stabilizer; 3-5 parts of foaming agent; 8-10 parts of a filler; based on the mass parts of the PVC resin; the base layer (1) is knitted fabric, and the water absorbing layer (3) is composed of a scale-shaped super water absorbing resin inner surface layer (30) formed by processing starch acrylonitrile graft copolymer and paper pulp and a pure cotton non-woven fabric layer (31) arranged between the inner surface layer and the foaming layer (2).

2. The leather for automobile interior decoration according to claim 1, wherein the inner surface layer (30) of the super absorbent resin is plated on the outer surface of the pure cotton non-woven fabric layer (31) by electrostatic deposition; the surface decorative layer is adhered on the outer side surface of the super absorbent resin inner surface layer (30) by adopting an adhesive mode.

3. The leather for automobile interior decoration as claimed in claim 1, wherein the surface finishing layer (4) is provided with a plurality of through holes and water-absorbent fluff (32) connected to the inner super absorbent resin layer (30) through the through holes, and the water-absorbent fluff (32) is connected to the inner super absorbent resin layer (30) by means of electrostatic flocking.

4. The leather for automobile interior decoration as claimed in claim 1, wherein the water-absorbing fluff (32) is composed of the following raw materials in parts by weight: 70-100 parts of polylactic acid slices, 8-12 parts of micron bamboo charcoal fibers, 2-5 parts of a phase solvent, 5-9 parts of polybutylene terephthalate, 2-4 parts of nano titanium dioxide, 0.5-1 part of chitosan, 20-30 parts of unsaturated polyester resin, 20-30 parts of vinyl ester resin and 0.8-2 parts of an initiator.

5. Leather for vehicle interior decoration according to claim 4, wherein the length of the water-absorbing fluff (32) is greater than the depth of the through-hole, and the difference between the two is between 1 and 2 mm.

6. Leather for vehicle interior finishing according to claim 4, wherein said surface finishing layer (4) is a planar double layer structure of two polymer materials having different moisture absorption characteristics, which is planar when not wetted and becomes curved when wetted, and the surface finishing layer (4) is a combination of a first web layer of a moisture-absorbent polymer component and a second web layer of a relatively hydrophilic polymer component.

7. A process for producing leather suitable for use in the automotive interior according to claim 1, comprising the steps of: (1) firstly, uniformly mixing the polyphenylene ether ketone and the nano alumina in parts by weight through a mixing kettle (5) for later use; keeping the temperature of the mixing kettle (5) at 150-170 ℃;

(2) feeding PVC resin powder, hindered phenol antioxidant, elastic modifier, plasticizer, stabilizer, foaming agent and filler into a mixing kettle (5) according to parts by weight for uniform mixing;

(3) feeding the mixture obtained in the step (1) and the step (2) into a mixing kettle (5) for mixing;

(4) carrying out banburying and roll mixing on the mixed components in the step, wherein the temperature of banburying and roll mixing is 350-450 ℃;

(5) carrying out calendering molding on the mixed components and knitted fabric serving as a substrate layer (1) through a calender (6), and cooling to obtain a PVC artificial leather substrate part;

(6) adding 1230ml of water and 87g of corn starch into a reaction kettle, uniformly stirring, heating to 70 ℃ for gelatinization for half an hour, cooling to 30 ℃, sequentially adding 76g of acrylonitrile and 65ml of ammonium ceric nitrate solution, reacting the mixture at 30-35 ℃ for 1h, neutralizing with 8mol/L of HCL solution until the pH value is 7.2-7.5, filtering, washing, and vacuum-drying at 60 ℃ to obtain the starch acrylonitrile graft copolymer;

(7) mixing the starch acrylonitrile graft copolymer with paper pulp according to the weight ratio of 1:1, tabletting and drying to obtain the starch acrylonitrile graft copolymer paper pulp; the super absorbent resin inner surface layer (30) is plated on the outer surface of the pure cotton non-woven fabric layer (31) by adopting an electrostatic deposition method; the pure cotton non-woven fabric layer (31) is bonded on the outer side surface of the foaming layer (2) in an adhesive mode, and the surface decorative layer with the through holes is bonded with the super absorbent resin inner surface layer (30);

(8) the water-absorbing fluff (32) is prepared by adding other raw materials except bamboo charcoal fiber into a kneader and kneading for 30-50 min;

then adding the bamboo charcoal fiber into the kneading machine and kneading for 5-8 minutes to obtain a master batch;

melting and dispersing the master batch, and then spinning to obtain water-absorbing fluff (32);

(9) electrostatic flocking: the surface decoration layer is processed by gluing and electrostatic flocking,

(10) naturally cooling and packaging.

8. The process for processing leather for automobile interior decoration according to claim 7, wherein the electrostatic high voltage is 70-110 kV; the flocking pole distance is 10-15 cm; flocking time is 7-10min, and heating temperature is 120-150 ℃.

Technical Field

The invention relates to the technical field of automobile interior leather materials, in particular to leather for automobile interior decoration.

Background

With the enhancement of the environmental protection and animal protection consciousness of people and the development of chemical industry, people gradually replace expensive animal leather with artificial leather which has the appearance comparable to that of animal leather fabric, the use of synthetic leather is more and more, and the leather for automobile interior decoration needs to be covered in a larger area, so that the ductility of the leather needs to be increased to ensure good practical effect;

moreover, the conventional leather for automobile interior trim is not particularly focused on the waterproof performance, but if the waterproof performance of the leather is not focused on, the influence on the interior trim is easily caused, especially on some electronic devices, if a sound box, an air conditioner and the like, a certain influence is caused along with the flow of water flow, and the improvement of the waterproof performance of the leather for automobile interior trim is also a problem existing at present.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the leather for the automotive interior, which has the advantages of good water absorption effect, strong ductility, simple structure and strong practicability.

In order to achieve the purpose, the invention provides the following technical scheme: the leather for the automotive interior comprises a leather base layer, a foaming layer, a water absorbing layer and a surface modification layer, wherein the leather base layer, the foaming layer, the water absorbing layer and the surface modification layer are sequentially connected from inside to outside, and the foaming layer is prepared from the following raw materials in parts by weight: 100 parts by mass of PVC resin; 75-85 parts by mass of a plasticizer; 30-40 parts of polyphenylene ether ketone; 5-10 parts of nano aluminum oxide; 10-15 parts of color paste; 5-10 parts by mass of an elastic modifier; 1-3 parts by mass of a heat stabilizer; 3-5 parts by mass of a foaming agent; 8-10 parts by mass of a filler; based on the mass parts of the PVC resin; the base layer is knitted fabric, and the water absorbing layer is composed of a scale-shaped super absorbent resin inner surface layer processed by starch acrylonitrile graft copolymer and paper pulp and a pure cotton non-woven fabric layer arranged between the inner surface layer and the foaming layer.

The invention is further configured to: the inner surface layer of the super absorbent resin is plated on the outer surface of the pure cotton non-woven fabric layer by adopting an electrostatic deposition method; the surface decorative layer is adhered to the outer side surface of the super absorbent resin inner surface layer in an adhesive mode.

The invention is further configured to: the surface modification layer is provided with a plurality of through holes and water absorption fluff which penetrates through the through holes and is connected with the inner surface layer of the super absorbent resin, and the water absorption fluff is connected with the inner surface layer of the super absorbent resin in an electrostatic flocking mode.

The invention is further configured to: the water absorption fluff is composed of the following raw materials in parts by weight: 70-100 parts of polylactic acid slices, 8-12 parts of micron bamboo charcoal fibers, 2-5 parts of a phase solvent, 5-9 parts of polybutylene terephthalate, 2-4 parts of nano titanium dioxide, 0.5-1 part of chitosan, 20-30 parts of unsaturated polyester resin, 20-30 parts of vinyl ester resin and 0.8-2 parts of an initiator.

The invention is further configured to: the length of the water absorbing fluff is larger than the depth of the through hole, and the difference value between the water absorbing fluff and the through hole is 1-2 mm.

The invention is further configured to: the surface modification layer is a planar double-layer structure formed by two polymer materials, the double-layer structure has different moisture absorption characteristics, the structure is in a planar state when not wetted and becomes arc-shaped after being wetted, and the surface modification layer is formed by combining a first net layer made of moisture absorption polymer components and a second net layer made of relatively hydrophilic polymer components into a whole.

By adopting the technical scheme, the foaming layer has the beneficial effects that 1, the raw material used as the foaming layer is set to be RH-1 type PVC resin; the elastic modifier is nitrile rubber; the foaming agent is azodicarbonamide; the filler is calcium carbonate; the plasticizer consists of 40-50 parts by mass of dioctyl phthalate, 15-25 parts by mass of dibutyl phthalate and 5-10 parts by mass of poly propylene glycol adipate; the heat stabilizer consists of 1-2 parts by mass of barium-cadmium stabilizer and 0.5-1 part by mass of dibutyltin laurate, and simultaneously, by adding polyphenylene ether ketone and nano-alumina, due to the characteristics of nano effect and porous structure of the nano-alumina, the polyphenylene ether ketone and the nano-alumina are mixed in a high-temperature environment, so that the polyphenylene ether ketone and the nano-alumina are adsorbed and permeated with each other, are dispersed more uniformly and are cooperated with each other, the dimensional stability and the strength toughness of each other are uniform, and the traditional polyurethane synthetic leather is changed The salt water absorption rate is more than 50 times, the absorption area is increased through the absorption of the water with the scale-shaped super absorbent resin, the good water absorption effect is improved, meanwhile, the structure of the pure cotton non-woven fabric layer and the foaming layer form a good matching effect, and the pure cotton non-woven fabric layer is used as a carrier of the super absorbent resin and forms a good combination effect on the super absorbent resin;

2. the surface modification layer is provided with a plurality of through holes and water-absorbing fluff which penetrates through the through holes and is connected with the inner surface layer of the super absorbent resin, the water-absorbing fluff is connected with the inner surface layer of the super absorbent resin in an electrostatic flocking mode, and the arranged water-absorbing fluff has a good water absorption effect and is conducted to the high water-absorbing resin part to increase the water absorption capacity;

3. the water absorption fluff is composed of the following raw materials in parts by weight: 70-100 parts of polylactic acid slices, 8-12 parts of micron-sized bamboo charcoal fibers, 2-5 parts of a phase solvent, 5-9 parts of polybutylene terephthalate, 2-4 parts of nano titanium dioxide, 0.5-1 part of chitosan, 20-30 parts of unsaturated polyester resin, 20-30 parts of vinyl ester resin and 0.8-2 parts of an initiator, wherein the bamboo charcoal fibers have high water absorption performance, and the firmness and toughness are enhanced by fusing the water absorption fibers with other resins and other raw materials, so that the bamboo charcoal fibers have high moisture absorption capacity, many gaps and holes in the fibers and large specific surface area, have high water absorption effect and high practicability;

4. the surface modification layer is a plane double-layer structure formed by two polymer materials (thermoelectric plastic elastomer (TPE)), and the two polymer materials have different moisture absorption characteristics, so that the structure is in a plane state when not wetted, and becomes arc after being wetted by water, thereby forming a good effect of preventing water flow, effectively preventing the flow area of water flow and forming effective control. The second relatively hydrophilic polymeric network may alternatively be TPE, a product of the type produced by PEBAX.

A processing technology suitable for the leather for the automotive interior comprises the following steps: (1) firstly, uniformly mixing polyphenylene ether ketone and nano-alumina according to parts by weight in a mixing kettle for later use; keeping the temperature of the mixing kettle between 150 and 170 ℃;

(2) feeding PVC resin powder, hindered phenol antioxidant, elastic modifier, plasticizer, stabilizer, foaming agent and filler into a mixing kettle according to parts by weight for uniform mixing;

(3) feeding the mixture obtained in the step (1) and the mixture obtained in the step (2) into a mixing kettle for mixing;

(4) carrying out banburying and roll mixing on the mixed components in the step, wherein the temperature of banburying and roll mixing is 350-450 ℃;

(5) carrying out calendering molding on the mixed components and knitted fabric serving as a substrate layer 1 through a calender 6, and cooling to obtain a PVC artificial leather substrate part;

(6) adding 1230ml of water and 87g of corn starch into a reaction kettle, uniformly stirring, heating to 70 ℃ for gelatinization for half an hour, cooling to 30 ℃, sequentially adding 76g of acrylonitrile and 65ml of ammonium ceric nitrate solution, reacting the mixture at 30-35 ℃ for 1h, neutralizing with 8mol/L of HCL solution until the pH value is 7.2-7.5, filtering, washing, and vacuum-drying at 60 ℃ to obtain the starch acrylonitrile graft copolymer;

(7) mixing the starch acrylonitrile graft copolymer with paper pulp according to the weight ratio of 1:1, tabletting and drying to obtain the starch acrylonitrile graft copolymer paper pulp; the inner surface layer of the super absorbent resin is plated on the inner surface of the pure cotton non-woven fabric layer by adopting an electrostatic deposition method; the super absorbent resin inner layer is bonded on the outer layer of the water absorption layer by adopting a bonding agent mode, and the surface decoration layer with the through holes is bonded with the super absorbent resin inner surface layer;

(8) the preparation method of the water-absorbing fluff comprises adding other raw materials except bamboo charcoal fiber into a kneader and kneading for 30-50 min;

then adding the bamboo charcoal fiber into the kneading machine and kneading for 5-8 minutes to obtain a master batch;

melting and dispersing the master batch, and then spinning to obtain water-absorbing fluff;

(9) electrostatic flocking: the surface decoration layer is processed by gluing and electrostatic flocking,

(10) naturally cooling and packaging.

The invention is further configured to: the electrostatic high voltage is 70-110 kV; the flocking pole distance is 10-15 cm; flocking time is 7-10min, and heating temperature is 120-150 ℃.

By adopting the technical scheme, the novel polyurethane synthetic leather has the beneficial effects that the polyphenylene ether ketone and the nano-alumina are added, and due to the characteristics of the nano-effect and the porous structure of the nano-alumina, the polyphenylene ether ketone and the nano-alumina are mixed in a high-temperature environment, so that the polyphenylene ether ketone and the nano-alumina are adsorbed and permeated with each other, are dispersed with each other more uniformly and cooperate with each other, the size stability and the strength toughness of each other are uniform, and the traditional polyurethane synthetic leather is changed;

and the starch acrylonitrile graft copolymer and the paper pulp are mixed according to the weight ratio of 1:1, and then the mixture is tabletted and dried to obtain the starch acrylonitrile graft copolymer paper pulp; the inner surface layer of the super absorbent resin is plated on the inner surface of the pure cotton non-woven fabric layer by adopting an electrostatic deposition method; the super absorbent resin inner layer is bonded on the outer layer of the water absorbing layer in an adhesive mode, the surface decorative layer with the through holes is bonded with the inner surface layer of the super absorbent resin, and the water absorbing fluff is used as a water absorbing guide material, so that the water absorbing range is increased, and the water absorbing capacity is greatly increased.

Drawings

FIG. 1 is a structural diagram of an embodiment of leather for automobile interior decoration and a processing method thereof according to the present invention.

Fig. 2 is a two-layer structure view of a surface finishing layer of leather for automobile interior and a processing process embodiment thereof.

FIG. 3 is a diagram of a structure of a preheating flow channel structure according to an embodiment of the present invention.

Reference number in the figure, 1, base layer; 2. a foamed layer; 3. a water-absorbing layer; 4. a surface modification layer; 30. a super absorbent resin inner surface layer; 31. a pure cotton non-woven fabric layer; 32. water absorption fluff; 5. a mixing kettle; 6. a calender; 7. preheating a flow channel; 8. a heater.

Detailed Description

Embodiments of a leather for automobile interior and a processing method thereof according to the present invention will be further described with reference to fig. 1 to 3.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.