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Adhesive film compounding method for preparing light weight reinforcement thermoplastic

A technology of enhanced thermoplastic and composite materials, which is applied in the field of composite materials for automotive interior parts, can solve the problems of uneven heating and heat transfer, large heating contact surface, melting and infiltration, etc., and achieve reduced mechanical properties, low cost, and floating rubber A large amount of effect

Inactive Publication Date: 2019-05-31
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of film holes and melt infiltration of traditional LWRT boards in the film compounding process, the present invention provides a film compounding method for preparing lightweight glass fiber reinforced thermoplastic composite materials
The invention utilizes the melting point difference between the adhesive film and the adhesive film to carry out compounding through the hot rolling process, avoids the problems of large heating contact surface of the plate of the traditional compounding machine, uneven heating and heat transfer, etc., and solves the compounding process of the plate film from the root The problems of film holes and partial area melting and infiltration often appear in the film, which ensure the flatness of the composite board and the sufficient amount of floating glue on the surface, and at the same time reduce the cost of composite tooling equipment and special barrier film preparation and use, and through experiments Detecting that the same gram weight of the film is compounded by different processes, the hot rolling process is superior to the traditional compound machine process

Method used

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  • Adhesive film compounding method for preparing light weight reinforcement thermoplastic
  • Adhesive film compounding method for preparing light weight reinforcement thermoplastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Lightweight fiber-reinforced thermoplastic composite sheet moldings are prepared by using the traditional composite machine hot-pressed composite method:

[0033] 50kg of glass fiber and 50kg of polypropylene fiber are fed into the bale opener, and after preliminary mixing, they are transported to the cotton storage bin, carded into a thin net, and then the thin net is laid into a certain number of layers of nets by a web lapper, and then needle punched Machine made felt. The felt is matured in a tenter oven at 190°C. The operating speed of the tenter oven is 5m / min to obtain a bare board, and then compounded with an adhesive film with a melting point of 108°C and 129°C in a compound machine. The weight of the two films is 45g / m 2 , the temperature of the hot plate is 110°C, the running speed is 5m / min, the cold roll is formed under the pressure of 0.6MPa, and then the cold plate is cooled and shaped at 25°C to make a lightweight fiber-reinforced thermoplastic composit...

Embodiment 2

[0036] Adopt the hot roll method of the present invention to prepare lightweight fiber-reinforced thermoplastic composite sheet moldings:

[0037] 50kg of glass fiber and 50kg of polypropylene fiber are fed into the bale opener, and after preliminary mixing, they are transported to the cotton storage bin, carded into a thin net, and then the thin net is laid into a certain number of layers of nets by a web lapper, and then needle punched Machine made felt. The felt is matured in a stenter oven at 190°C, and the operating speed of the stenter oven is 5m / min to obtain a bare board, and then roll-formed with an adhesive film with a melting point of 108°C and 129°C in a hot roller device. The weight is 45g / m 2 , the inner layer of adhesive film (melting point 108°C) first passes through the preheating roller, the oil temperature of the preheating roller is 80°C, the outer layer of adhesive film (melting point of 129°C) passes through the feeding cold roller, and then the bare boa...

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Abstract

The invention provides an adhesive film compounding method for preparing light weight reinforcement thermoplastic. According to the adhesive film compounding method for preparing the light weight reinforcement thermoplastic, a compounding equipment main body adopts a hot rolling mode, a bare board made of glass fibers and polypropylene fibers through a dry process and a plurality of layers of adhesive films are fed into a hot roller for compounding, the surface temperature of the hot roller is between the melting point of the inner-layer adhesive films and the melting point of the outer-layeradhesive films, and the value of the melting point of the adhesive films is gradually increased from the innermost-layer adhesive film to the outermost-layer adhesive film. According to the adhesive film compounding method for preparing the light weight reinforcement thermoplastic, the melting point difference between the adhesive films is used for compounding, so that the problems that a traditional compounding machine is large in flat-plate heating contact surface, uneven in heating and heat-transferring and the like are solved, and the problems that film perforation and local area melting infiltration that often occur in the process of plate and adhesive films compounding are fundamentally solved.

Description

technical field [0001] The invention belongs to the technical field of composite materials for automotive interior parts, and in particular relates to an adhesive film composite method for preparing lightweight glass fiber reinforced thermoplastic composite materials. Background technique [0002] Lightweight glass fiber reinforced thermoplastic composite material (Light Weight Reforcement Thermoplastic) referred to as LWRT sheet, mainly composed of glass fiber and polypropylene fiber, belongs to thermoplastic composite material. It has the following characteristics: (1) light weight; (2) good toughness; (3) recyclable; (4) good odor; (5) strong corrosion resistance; (6) good attraction performance. These characteristics are in line with the goal of light weight and energy saving and emission reduction in the automotive field, so they are widely used in the interior of automobiles. [0003] At present, there are two main processes for LWRT sheet preparation: (1) wet process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/50B29L7/00B29L9/00
Inventor 曹安东马国维方晶花东龙吕超目周立陈佳扬刘志阳
Owner 浙江华江科技股份有限公司