CN212332019U

CN212332019U - Environment-friendly high-sound-absorption automotive carpet

Info

Publication number: CN212332019U
Application number: CN202020744970.3U
Authority: CN
Inventors: 谭曾凯; 郑冠崔; 赵宗慧; 王险峰; 张俊
Original assignee: Guangzhou Linjun Co ltd
Current assignee: Guangzhou Linjun Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-01-12
Anticipated expiration: 2030-05-08

Abstract

The utility model provides an environmental protection height inhales sound automotive carpet, includes from top to bottom compound epidermal layer in proper order, sound absorbing layer, polyethylene layer and the cotton pad of coconut palm, the bottom surface of epidermal layer with sound absorbing layer's top surface combines through the compound mode of acupuncture, the polyethylene layer through with coating after melting polyethylene resin in sound absorbing layer's bottom surface, the cotton pad of coconut palm is crisscross the mixing constitution of coconut palm fibre, ordinary fibre, low melting point fiber, flame retardant fiber. The epidermis is crisscross the mixture by ordinary fibre, low melting fiber and flame retardant fiber with the sound absorbing layer and is constituted, the utility model has the advantages of the sound is inhaled to the height, environmental protection, smell VOC functional good, lightweight and low cost.

Description

Environment-friendly high-sound-absorption automotive carpet

Technical Field

The utility model relates to an auto-parts technical field especially relates to a high sound automotive carpet that inhales of environmental protection.

Background

With the increasing improvement of living standard, the quality requirement of people on the interior of the automobile is also improved, the noise in the automobile is a key performance index of the quality of the automobile, and the acoustic characteristic of the material of the interior trim part of the automobile plays a key role besides the influences of an engine, suspension, airtightness in the automobile, the thickness of a metal plate and the like. The carpet is the largest part of the automotive interior, and the influence on the noise in the automobile is very important. The carpet for vehicle on the market at present has very high price if it has good sound absorption performance; the carpet with low price can not meet the requirements of people in all aspects of performance. And the automobile carpets on the market are generally not environment-friendly enough, and have poor odor and VOC performance.

At present, the automobile carpet mainly has the following problems:

PET type carpets (skin combined with underlying PET cotton) are expensive; although PET carpets (the combination of the surface layer and the lower layer of recycled cotton) are inexpensive, they have poor sound absorption, poor VOC odor performance, and poor support. Polyurethane carpets have poor odor, VOC performance, poor support, high price and are not environment-friendly. The carpet is generally very heavy and is not in line with the idea of light weight.

The reasons for the above disadvantages are mainly:

1. PET carpets are expensive, and many manufacturers add a lot of recycled cotton to the surface or lower cotton mats to save cost, which results in poor overall carpet performance due to poor sound absorption, poor VOC odor performance, and softness without support.

2. The polyurethane carpet is formed by combining an upper layer of surface skin and a lower layer of polyurethane, the polyurethane is formed by isocyanate, polyether polyol and other auxiliary agents under high-pressure foaming, the raw materials of the polyurethane carpet are toxic and have a large smell, and although the formed polyurethane is non-toxic, the odor VOC performance of the polyurethane is poor. Polyurethane has good sound absorption performance because of being a porous material, but the polyurethane also has poor support performance, and EPP or EPS foaming blocks are added to the lower layer to play a support role in practical application. In order to prevent polyurethane from penetrating into the surface of the carpet to affect the appearance, an EVA film is added between the surface skin and the polyurethane, which also results in the overall weight of the carpet.

On the premise of lower and more substantial price, the carpet still has high sound absorption, good odor and VOC performance and is more environment-friendly, which is the current development direction of the automobile carpet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above problem that prior art exists, provide an environmental protection height and inhale the lightweight automotive carpet who contains natural coconut palm fibre.

For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

the utility model provides an environmental protection height inhales sound automotive carpet which characterized in that, includes from top to bottom compound epidermal layer, polyethylene layer and the cotton pad of coconut palm in proper order, the polyethylene layer melts the back with polyethylene resin and coats the back of upper story, the cotton pad of coconut palm contains the coconut palm fibre.

In addition, be equipped with the sound absorbing layer between epidermal layer and the polyethylene layer, the bottom surface of epidermal layer with the top surface on sound absorbing layer combines through the compound mode of acupuncture, the polyethylene layer through with polyethylene resin melt back coat in the bottom surface on sound absorbing layer, the cotton pad of coconut palm contains the coconut palm fibre.

Further, the skin layer is formed by mixing common fibers, low-melting-point fibers and flame-retardant fibers through mechanical lapping.

Further, the sound absorption layer is formed by mixing common fibers, low-melting-point fibers and flame-retardant fibers through mechanical lapping.

As another technical means, the upper surface of the skin layer is subjected to napping treatment to form a napped layer.

Preferably, the polyethylene layer is compounded with the coconut palm fiber cotton pad in a hot pressing mode.

Preferably, the coconut palm fiber cotton pad is formed by interlacing and mixing coconut palm fiber, common fiber, low-melting-point fiber and flame-retardant fiber through air laying.

Further, the thickness of the surface layer is 1-2 mm; the thickness of the sound absorption layer is 2-4 mm.

Further, the gram weight of the skin layer is 300-450 g/m²The gram weight of the sound absorption layer is 300-²。

Compared with the prior art, the utility model discloses mainly there are following several advantages:

1. high sound absorption: the carpet can fully absorb the noise that car inner space and chassis panel beating sent, and play the polyurethane of key factor to the sound absorption in the carpet is cotton pad or lower floor of lower floor, we have used the cotton pad of coconut palm to replace original understructure, coconut palm silk toughness in the cotton pad of coconut palm is good, intensity height can establish the network structure that does benefit to the sound of inhaling in the cotton pad, thereby improve the sound absorption performance of cotton pad, and the skin layer has selected the acupuncture complex with the bonding mode on sound absorption layer, one deck PE has been reduced, can make the noise more easily absorbed by the carpet like this.

2. Environmental protection, the smell VOC performance is good: the natural coconut fiber is used in the carpet cotton pad, and compared with PET fiber or polyurethane, the natural coconut fiber is more environment-friendly, the VOC performance of the smell is better, and the overall performance of the carpet is effectively improved.

3. The weight is reduced. Compared with polyurethane carpets, the carpet is lighter, and a very heavy film is added between the surface skin and the polyurethane of the polyurethane carpet to prevent the polyurethane from permeating the surface skin of the carpet.

4. The cost is low. The coconut palm fiber in the coconut palm cotton pad is natural and does not need to be processed through complicacy, so the material cost is lower than PET and polyurethane, the preparation technology of coconut palm cotton pad adopts the air laying, the cost is lower than other technologies on the market, and the coconut palm cotton pad has certain support nature, need not need like polyurethane carpet lower floor need EPS or EPP foaming piece as the support, simultaneously, the bonding mode of epidermis and sound absorbing layer has selected the acupuncture complex, reduces PE's use.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

Referring to the attached drawing 1, an environmental protection high sound absorption automotive carpet, including from top to bottom compound epidermal layer 1 in proper order, sound absorbing layer 2, polyethylene layer 3 and coconut palm cotton pad 4, the bottom surface of epidermal layer 1 combines through the compound mode of acupuncture with the top surface of sound absorbing layer 2, polyethylene layer 3 coats in the bottom surface of sound absorbing layer 4 after melting polyethylene resin (polyethylene layer 3 mainly melts PE (polyethylene) resin through the heating, again with PE evenly coating at the back of sound absorbing layer 2, carry out the back coating complex), coconut palm cotton pad 4 is the coconut palm fibre, ordinary fibre, low melting fiber, fire-retardant fiber passes through the crisscross mixture of air laid net and constitutes.

The surface layer 1 and the sound absorption layer 2 are formed by mixing common fibers, low-melting-point fibers and flame-retardant fibers through mechanical lapping, and the surface layer and the sound absorption layer have different contents and types of the common fibers, the low-melting-point fibers and the flame-retardant fibers so as to achieve different performance targets. The thickness of the surface layer is 1-2 mm; the thickness of the sound absorption layer is 2-4 mm. The surface layer mainly plays a role in surface decoration, the sound absorption layer 2 plays a role in certain buffering and sound absorption, and the bottom surface of the surface layer 1 and the top surface of the sound absorption layer 2 are combined in a mode that a traditional PE (polyethylene) layer is not used for bonding, so that the purpose of the combination is to improve the sound absorption performance and further reduce the weight and cost.

In addition, the gram weight of the skin layer 1 is 300-450 g/m²The gram weight of the sound absorption layer 2 is 300-1000 g/m²The specific index can be adjusted according to the specific performance requirement, but in order to make the equipment needling process smoother, the optimal choice is to ensure that the gram weight of the two layers of the skin layer 1 and the sound absorption layer 2 which are superposed is 650-one 950 g/m²At the same time, the types and contents of the fibers in the surface layer and the sound absorption layer can be changed to achieve the performance goal.

The coconut palm cotton pad adopts natural coconut palm fiber (coconut palm tissue from the surface of coconut shell is simply processed to be fiber) to replace a part of common fiber (the replacement proportion can be adjusted between 5 percent and 45 percent according to the requirement), so that the composition of the cotton pad is changed into the coconut palm fiber, the common fiber, low-melting-point fiber and flame-retardant fiber, then various fibers are blown away in an air-flow net-forming mode to completely disorder and recombine various fibers, and then the coconut palm cotton pad is finally formed after heat setting, because the coconut palm fiber is natural fiber and has higher strength and toughness compared with the common fiber, the strength of the cotton pad is greatly improved compared with the original style, and the coconut palm fiber can establish a net-shaped structure which is favorable for sound absorption in the cotton pad (changing nine large parameters related to NV performance such as porosity, viscous characteristic length, thermal characteristic length and the like of the cotton pad), thereby improving the sound absorption and insulation performance of the cotton pad, and meanwhile, the cotton pad is very environment-friendly and has better smell than the original style.

The polyethylene layer 3 and the coconut palm fiber cotton pad 4 are heated to melt all the L-PET and PE resins in the material, and the L-PET and the PE resins are cooled, shaped and cut into edges after compounding, so that the environment-friendly high-sound-absorption lightweight automobile carpet containing natural coconut palm fibers is formed.

Example 2

In order to enhance decorativeness, the structure of the skin layer 1 was surface-treated on the basis of example 1, and the upper surface of the skin layer 1 was napped to form a nap layer 11.

Example 3

In order to reduce the overall weight and cost of the material, the sound absorption layer 2 is eliminated on the basis of the embodiment 1, and the material structure comprises a skin layer 1, a polyethylene layer 3 and a coconut palm cotton pad 4 which are sequentially compounded from top to bottom. The needling compounding of the surface layer 1 and the sound absorption layer 2 is eliminated, and the polyethylene layer 3 is directly heated and back-coated on the back surface of the surface layer 1.

Example 4

In order to enhance decorativeness, the structure of the skin layer 1 was surface-treated on the basis of example 3, and the upper surface of the skin layer 1 was napped to form a pile layer 11.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides an environmental protection height inhales sound automotive carpet which characterized in that, includes from top to bottom compound epidermal layer, polyethylene layer and the cotton pad of coconut palm in proper order, the polyethylene layer melts the back with polyethylene resin and coats the back of upper story, the cotton pad of coconut palm contains the coconut palm fibre.

2. The environment-friendly sound-absorbing automotive carpet as claimed in claim 1, wherein a sound-absorbing layer is disposed between the surface layer and the polyethylene layer, the bottom surface of the surface layer is combined with the top surface of the sound-absorbing layer by needle punching, and the polyethylene layer is coated on the bottom surface of the sound-absorbing layer after polyethylene resin is melted.

3. The carpet for car as claimed in claim 1 or 2, wherein the skin layer is formed by mixing the normal fiber, the low-melting fiber and the flame retardant fiber by mechanical lapping.

4. The carpet for car as claimed in claim 2, wherein the sound absorption layer is formed by mixing the general fiber, the low melting point fiber and the fire retardant fiber by mechanical lapping.

5. The environment-friendly high sound absorption automobile carpet as claimed in claim 3, wherein the polyethylene layer and the coconut palm fiber cotton pad are compounded by means of hot pressing.

6. The environment-friendly high sound absorption automobile carpet as claimed in claim 3, wherein the coconut fiber cotton pad is formed by interlacing and mixing coconut fiber, normal fiber, low melting point fiber and flame retardant fiber through air-laying.

7. The environment-friendly high sound absorption automotive carpet as claimed in claim 2, wherein the thickness of the skin layer is 1 to 2 mm; the thickness of the sound absorption layer is 2-4 mm.

8. The carpet as claimed in claim 3, wherein the skin layer has a grammage of 300-450 g/m²The gram weight of the sound absorption layer is 300-²。

9. The carpet for car of claim 3, wherein the upper surface of the skin layer is napped to form a napped layer.