Preparation method for modified reinforced hemp fiber

A hemp fiber and enhanced technology, which is applied in the field of preparation of modified enhanced hemp fiber, can solve problems such as shaving, long hairiness on the surface of the fabric, and poor interface compatibility, so as to increase the bonding strength, eliminate formaldehyde release, and improve phase. capacitive effect

Active Publication Date: 2018-05-18
JIANGYIN YANLI AUTOMOBILE DECORATIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the hemp fiber in the existing hemp fiber composite board has not been modified and strengthened. The hemp fiber contains a large number of hydroxyl groups and is a hydrophilic polar material, while polypropylene is a hydrophobic non-polar material and is essentially hydrophilic. Water-based plant hemp fiber and hydrophobic polypropylene are incompatible, and the interfacial compatibility between untreated hemp fiber and resin matrix is ​​extremely poor
The hemp fiber composite board produced by the prior art has outstanding hemp rigidity, poor cohesion between fibers, long hairiness o

Method used

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  • Preparation method for modified reinforced hemp fiber
  • Preparation method for modified reinforced hemp fiber

Examples

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Example Embodiment

[0027] Example 1:

[0028] Such as figure 1 Shown as an example of the preparation method of a modified reinforced hemp fiber of the present invention, including the following process steps:

[0029] Step 1. Hemp fiber is washed with water;

[0030] Step 2. Dry the hemp fiber after washing;

[0031] Step 3. Prepare the working fluid: use water as the base fluid and JFC penetrant as the additive to prepare the penetrant working fluid;

[0032] Step 4. Pre-moisten the hemp fiber with warm water;

[0033] Step 5. Put the hemp fiber into the working fluid for heat preservation and dipping;

[0034] Step 6. Wash with warm water;

[0035] Step 7. Wash in cold water;

[0036] Step 8. Drying treatment.

[0037] In this embodiment, the ratio of the working fluid of the penetrant is: 0.8-1 g of JFC penetrant is added per liter of water.

[0038] In the step 5 of this embodiment, the fixed bath ratio of putting the hemp fiber into the working fluid for heat preservation and dipping is 1:50.

[0039] In t...

Example Embodiment

[0043] Example 2:

[0044] The modified and reinforced hemp fiber prepared in Example 1 was tested for harmful substances according to the CS-A0229 standard of Fiat Automobile Company. At the same time, the hemp fiber manufactured by conventional technology is taken as a comparison. The bag size is 100L, and the sampling size is 500c㎡. Wherein, the hemp fiber manufactured by the conventional process is not modified and reinforced.

[0045] The measured data of hazardous substances are as follows:

[0046]

Example Embodiment

[0047] Example 3:

[0048] The modified reinforced hemp fiber prepared in Example 1 was used as a raw material to prepare a hemp fiber composite board, and the density test and strength test were performed. At the same time, the hemp fiber without modification and reinforcement treatment was used as the raw material to prepare the hemp fiber composite board as a comparison.

[0049] In the above two hemp fiber composite boards, the ratio of hemp fiber and polymer PP fiber is the same, and both are 50% hemp fiber + 50% polymer PP fiber.

[0050] The measured density data of hemp fiber composite board is as follows:

[0051]

[0052] The measured tensile strength and bending strength data are compared as follows:

[0053]

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Abstract

The invention discloses a preparation method for modified reinforced hemp fibers, belonging to the technical field of hemp fiber preparation. The preparation method comprises the following process steps: step 1, water processing of hemp fibers; step 2, drying treatment of the washed hemp fibers; steps 3, preparation of a working solution: with water as a base solution and a JFC penetrant as an additive, preparing the penetrant working solution; step 4, pre-wetting of the hemp fibers with warm water; step 5, heat-preserved impregnation of the hemp fibers in the working solution; step 6, washingwith warm water; step 7, washing with cold water; and step 8, drying. The preparation method can effectively reduce harmful substances such as aldehydes and benzenes in the hemp fibers, so the modified reinforced hemp fibers prepared in the invention has good environmental protection performance; and a hemp fiber composite board made of the modified reinforced hemp fibers is high in the bonding strength of the hemp fibers and PPs and can maintain high strength under the condition of low density, so the hemp fiber composite board is allowed to have light weight.

Description

technical field [0001] The invention relates to the technical field of hemp fiber preparation, in particular to a preparation method of modified reinforced hemp fiber. Background technique [0002] Plant hemp fiber has the characteristics of low cost, light weight, natural degradation, high specific strength and specific modulus, and is widely used in the preparation of fiber composite reinforcement materials. For example, in the automotive industry, hemp fiber composite panels have been developed to replace widely used synthetic reinforced fiber panels such as glass fiber panels. For example, the hemp fiber composite board made of hemp fiber and polymer PP fiber has been well applied in the interior materials of automobiles. [0003] However, the hemp fiber in the existing hemp fiber composite board has not been modified and strengthened. The hemp fiber contains a large number of hydroxyl groups and is a hydrophilic polar material, while polypropylene is a hydrophobic non-...

Claims

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Application Information

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IPC IPC(8): D06M15/53C08L23/12C08L1/02D06M101/06
CPCC08L1/02C08L23/12D06M15/53D06M2101/06
Inventor 徐松庄理少
Owner JIANGYIN YANLI AUTOMOBILE DECORATIVE PARTS
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