CN206840876U

CN206840876U - A kind of polyurethane closed-cell foam product

Info

Publication number: CN206840876U
Application number: CN201720758307.7U
Authority: CN
Inventors: 董升顺
Original assignee: ARTIE INDUSTRIAL CO LTD CHINA
Current assignee: ARTIE INDUSTRIAL CO LTD CHINA
Priority date: 2017-06-27
Filing date: 2017-06-27
Publication date: 2018-01-05
Anticipated expiration: 2027-06-27

Abstract

The utility model discloses a kind of polyurethane closed-cell foam product, including leather layer, the PU foaming bed of materials, PU foamed materials are placed on leather layer, and glass fiber reticular cloth is set in the PU foaming bed of materials, polyester toughness reinforcing air-permeable layer is set on the PU foaming bed of materials.Due to the polyurethane closed-cell foam product, glass knitmesh before laying replaces short glass fiber into cloth, according to the characteristics of glass fiber reticular cloth mechanical property anisotropic, the maximized intensity for utilizing glass, and combine toughness, the gas permeability of poly- toughness reinforcing breathable composite, so as to reduce glass and PU foamed material usage amounts while product mechanical index is ensured, product density is reduced to 395 392 kg/m3 by 500 kg/m3, about loss of weight 20%, improve the mechanical property of product, reach that intensity is more preferable, the lighter purpose of weight；This product density is low, few using raw material, and comprehensive production cost declines about 25%, has good economic benefit.

Description

A kind of polyurethane closed-cell foam product

Technical field

It the utility model is related to automotive upholstery production field, in particular to a kind of polyurethane closed-cell foam product.

Background technology

In recent years, integral new-energy passenger is developing rapidly, and industry is to the lightweight requirements of bus interior also more and more higher.Poly- ammonia The car of ester foaming and bus air channel and baseplate of luggage rack are with its 500kg/m3 or so density lightweight in industry aspect With certain advantage, at present the short glass fiber enhancing used in industry, short glass fiber is unordered, mechanical property when being mixed with PU material Isotropism, its vertical mixing coefficient intensity can not be maximized, it is impossible to meet the market demand, with advances in technology, country is right The requirement more and more higher of environmental protection, bus interior industry are badly in need of a kind of in light weight, good polyurethane closed-cell foam product of performance To reach every demand.

In bus interior industry, polyurethane closed-cell foam technology is on the products such as air channel, baseplate of luggage rack with very wide General, widespread practice is to be foamed on PVC leathers to decorate bottom using PVC leathers, because PVC leathers are airtight, gathered Gas easily produces vacuole, it is necessary to repair in product surface caused by urethane closed-cell foam, causes production efficiency, product quality drop It is low, the method for solving these problems is there is no at present.

The content of the invention

Technical problem to be solved in the utility model is to overcome prior art insufficient, there is provided a kind of polyurethane closed-cell foam Product, make product lightweight, performance is more preferable, and product surface will not produce vacuole, it is not necessary to repair, improve production efficiency, production Quality.

In order to solve the above-mentioned technical problem, the utility model adopts the following technical scheme that：A kind of polyurethane closed-cell foam production Product, including leather layer, the PU foaming bed of materials, PU foamed materials are placed on leather layer, and fiberglass mesh is set in the PU foaming bed of materials Cloth, PU foaming the bed of material on set polyester toughness reinforcing air-permeable layer.

Due to the polyurethane closed-cell foam product, different from the short fine spray technology of polyurethane, set in the PU foaming bed of materials Long fine grid cloth laying process, glass knitmesh before laying into cloth, exist, according to glass in the form of a grid in PU foamed materials The characteristics of fine grid cloth mechanical property anisotropic, short glass fiber is replaced using fiberglass gridding cloth, maximumlly utilizes glass Intensity, and combine poly- toughness reinforcing breathable composite toughness, gas permeability, so as to subtract while product mechanical index is ensured Few glass is reduced to 395-392 kg/m3, about loss of weight 20% by 500 kg/m3, reached with PU foamed material usage amounts, product density Product light-weighted purpose；Mechanical property anisotropic, the mechanical property of product is improved, weight more preferable so as to reach intensity The lighter purpose of amount（Refer to table 1）；Product density of the present utility model is low, few using raw material, while the glass fiber reticular cloth of use, The cost of toughness reinforcing ventilated membrane declines about 25% less than the raw material of PU foaming and the cost of short glass fiber, comprehensive production cost, has good Economic benefit.

The utility model uses toughness reinforcing breathable composite, and the material is made up of toughened resin and breathable microporous film, increases Tough resin can be that product brings intensity, and microporous barrier brings gas permeability --- the aperture of microporous barrier is more than bubble（PU is produced when foaming It is raw）, expect less than PU, after PU material injection moulds, toughness reinforcing breathable composite be covered on PU material, polyester toughness reinforcing air-permeable layer exists Under mold, air reservoir is arranged below in mold, is provided with blast pipe, blast pipe and atmosphere in mold, blast pipe leads to Gas collection hole is crossed to connect with air reservoir；When matched moulds foams, by the combination of mould and toughness reinforcing breathable composite, there is exhaust knot The mould of structure applies pressure to PU foamed materials, in product bubble because die pressure and mould temperature driving to PU expect outside move, toughness reinforcing Breathable composite separates bubble with PU, and bubble is temporarily stored into the air reservoir of mould after passing through toughness reinforcing breathable composite, with Gas increases, and is gradually moved to blast pipe, the bubble in foamed material is extruded by blast pipe, reaches the purpose of exhaust.Pass through This process, it can effectively reduce the vacuole quantity of product surface（Refer to table 2）, qualification rate rises 78%, reduces unnecessary secondary Polishing, defoaming work step, improve product quality and production efficiency.

Table 1- polyurethane closed-cell foam product mechanical property indexs

Product void fraction contrasts before and after table 2- new technologies are implemented

Brief description of the drawings

Fig. 1 is polyurethane closed-cell foam product structure schematic diagram；

Fig. 2 is vented mould structural representation；

Fig. 3 mould part A enlarged drawings.

Embodiment

With reference to figure 1, Fig. 2, Fig. 3, the polyurethane closed-cell foam product, including leather layer 7, the PU foaming bed of materials 8, PU foaming The bed of material 8 is placed on leather layer 7, and glass fiber reticular cloth 9 is set in the PU foaming bed of materials 8, sets polyester toughness reinforcing saturating on the PU foaming bed of materials 8 Gas-bearing formation 10.One or more layers can be set in glass fiber reticular cloth 9.

The utility model is made up of using toughness reinforcing breathable composite toughened resin and breathable microporous film, and toughened resin can Intensity is brought for product, microporous barrier brings gas permeability --- the aperture of microporous barrier is more than bubble（PU is produced when foaming）, less than PU Material, the utility model use the mould with degassing function, and the mould is heated；Closed pore PU foaming mould structures, including Upper and lower mould 5,1, air reservoir 3 is arranged below in mold 5, blast pipe 4, blast pipe 4 and atmosphere are provided with mold 5, Blast pipe 4 is connected by gas collection hole 6 with air reservoir 3.

Described upper and lower mould is provided with heating tube 2, there is provided the environment temperature needed for foamed material foaming, while also raise Gas temperature, with the external world forms temperature difference, accelerates the speed of gas discharge, increases exhaust efficiency.Partial enlargement Fig. 2 In, the extruding of upper and lower mould 5,1 and the temperature that has of mould heating, the gas in PU foamed materials 8 are formed necessarily with ambient temperature Pressure difference and temperature difference, the generation gases of closed pore PU material 8 are extruded to air reservoir 3 during foaming, and the gas in air reservoir 3 is superfluous When, the gas in air reservoir 3 enters blast pipe 4 by gas collection hole 6, and gas is drained into air.So as to reduce product vacuole Rate.

The mould with exhaust structure that the utility model uses, exhaust passage is provided for gas caused by PU foaming, The gas with reference to caused by polyester toughness reinforcing breathable composite discharge PU foamed materials, so as to sinking void fraction, reduces unnecessary repair Work step is mended, is improved production efficiency and product quality.

Embodiment 1, the mould with degassing function is prepared, the mould is heated；Area, size, the number of plies will be set Grid glass layer of cloth and toughened resin composite are spooled stand-by with equipment in advance；Mould is opened, the tiling of PVC leathers is arrived down Mould；Glass fiber reticular cloth is laid on PVC leathers, PU is then expected into injection mould；Toughness reinforcing breathable composite is covered in PU On material；Matched moulds pressurize is foamed.It is 392 kg/m3, tensile strength 14Mpa, impact strength 20kJ/m2 to obtain product density, and bending is strong Spend 13.5Mpa.

Claims

1. a kind of polyurethane closed-cell foam product, including leather layer, the PU foaming bed of materials, PU foamed materials are placed on leather layer, its It is characterized in：Glass fiber reticular cloth is set in the described PU foaming bed of materials, polyester toughness reinforcing air-permeable layer is set on the PU foaming bed of materials.